US20180375171A1 - Vehicular battery charger, charging system, and method - Google Patents

Abstract

A vehicle battery charger and a vehicle battery charging system are described and illustrated, and can include a controller enabling a user to enter a time of day at which the vehicle battery charger or system begins and/or ends charging of the vehicle battery. The vehicle battery charger can be separate from the vehicle, can be at least partially integrated into the vehicle, can include a transmitter and/or a receiver capable of communication with a controller that is remote from the vehicle and vehicle charger, and can be controlled by a user or another party (e.g., a power utility) to control battery charging based upon a time of day, cost of power, or other factors.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS
• The present patent application is a continuation of U.S. patent application Ser. No. 12/737,803, filed Feb. 17, 2011, which application is a national stage filing under 35 U.S.C. § 371 of International Application No. PCT/US2009/054174, filed on Aug. 18, 2009, which claims the benefit of U.S. Provisional Patent Application No. 61/189,353 filed on Aug. 18, 2008, the entire contents of which are incorporated herein by reference in their entireties.
BACKGROUND
• In light of the ever-rising costs of energy in the global market, energy consumers of all types seek to reduce the impact such costs to the greatest extent possible. One popular manner of doing so is the use of vehicles that do not rely solely (and in some cases, at all) upon petroleum products as a source of energy. Many such vehicles have been developed that rely exclusively or in large part on batteries that must be recharged from a source of electrical power external to the vehicle. Such vehicles are referred to hereinafter simply as “electric vehicles,” it being understood that this term refers to any vehicle requiring an external supply of electrical power to charge the vehicle for normal use. By way of example and without limitation, the term “electric vehicle” therefore refers to vehicles whose primary source of power is electrical batteries, as well as vehicles that have other sources of power (e.g., biofuel, fuel cells, natural gas, compressed air, and the like) in addition to or in lieu of electrical batteries, but that are designed to be supplied with electrical power from an external source to improve efficient operation of the vehicle.
• Unfortunately, significant limitations exist to the widespread utilization of electric vehicles. For example, most households have a small number of appliances, devices, and systems that require a significant draw of electrical power from a power supplier. The introduction of an electrical vehicle as another daily draw of electric power for a household would place unprecedented strain on community power systems, many of which are already incapable of meeting peak demands. This problem is exacerbated by the fact that in some cases, the daily draw of electric power to charge the battery of an electric vehicle may be the highest of a household.
• Simply put, existing power infrastructure for most communities is incapable of meeting the demand that widespread use of rechargeable electric vehicles would place on the infrastructure. Until electrical power distribution infrastructure is updated to meet this demand (and even after such a time), improvements in energy distribution and utilization for charging electric vehicle batteries are welcome in the art.
SUMMARY OF THE INVENTION
• In some embodiments, a vehicle charger for charging a battery of a vehicle and adapted for communication with a first controller remote from the vehicle and vehicle charger, wherein the vehicle charger comprises an electrical power cord releasably attachable to at least one of the vehicle and a source of power; a second controller electrically coupled to the electrical power cord; and at least one of a transmitter and a receiver coupled to the second controller and adapted for communication with the first controller, the second controller responsive to at least one signal from the first controller by changing a charging state of the vehicle charger.
• Some embodiments of the present invention provide a vehicle charger for charging a battery of a vehicle in the course of a charging session, wherein the vehicle charger comprises a controller; a display coupled to the controller and adapted to display a time; and a user-manipulatable control coupled to the controller and operable by a user to enter a time of day at which the charging session will end, the controller changing the supply of electric power to the vehicle battery during the course of the charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon the time needed to charge the vehicle battery by the time of day entered by the user.
• In some embodiments, a vehicle charger for charging a battery of a vehicle is provided, wherein the vehicle charger comprises a display mounted within the vehicle within reach of a user seated within the vehicle; a user-manipulatable control within reach of the user seated within the vehicle and by which a user can enter a time of day; a controller coupled to the display and to the battery, the controller changing a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon the time of day entered by the user.
• Some embodiments of the present invention provide a vehicle charger for charging a battery of a vehicle, wherein the vehicle charger comprises: a controller; and a memory coupled to the controller and in which to save a time of day entered by a user; the controller changing a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon the time of day entered by the user; and wherein the controller supplies electric power to the battery if a level of battery charge is below a threshold level of battery charge independent of the time of day entered by the user, the controller supplying electric power to the battery until the threshold level of battery charge is reached.
• In some embodiments, a vehicle charger for charging a battery of a vehicle is provided, wherein the vehicle charger comprises a controller; a display coupled to the controller; and a memory accessible by the controller and in which to save a time of day; the controller changing a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon the time of day; the controller operable to display at least two different screens upon the display, at least one of the screens displaying information regarding a charging session, and at least one of the screens displaying settings at least partially defining the manner of operation of the vehicle charger.
• Some embodiments of the present invention provide a vehicle charger for charging a battery of a vehicle and adapted for communication with a first controller remote from the vehicle and vehicle charger, wherein the vehicle charger comprises a display; a second controller coupled to the display and operable to change a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon a time of day; and at least one of a transmitter and a receiver coupled to the second controller and adapted for communication with the first controller, wherein the second controller displays an indicator indicating a status of communication between the first and second controllers.
• In some embodiments, a vehicle charger for charging a battery of a vehicle is provided, and comprises a controller; and a display coupled to the controller; the controller changing a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon a time of day; the controller operable to display on the display an amount of time remaining to complete charging of the battery.
• Some embodiments of the present invention provide a vehicle charger for charging a battery of a vehicle, wherein the vehicle charger comprises a controller; and a display coupled to the controller; the controller changing a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon a time of day; the controller operable to display on the display an amount of power consumed by the battery during the charging session.
• In some embodiments, a vehicle charger for charging a battery of a vehicle is provided, and comprises a controller; and a display coupled to the controller; the controller changing a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon a time of day; the controller operable to display on the display a cost of power supplied to the vehicle charger.
• Some embodiments of the present invention provide a vehicle charger for charging a battery of a vehicle in the course of a charging session, wherein the vehicle charger comprises an electrical power cord releasably attachable to at least one of the vehicle and a source of power; a controller; a housing attached to the electrical cord; a display on the housing, coupled to the controller, and adapted to display a time; and a user-manipulatable control coupled to the controller and operable by a user to enter a time of day; the controller changing the supply of electric power to the vehicle battery during the course of the charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon the time of day entered by the user.
• In some embodiments, a vehicle charger for charging a battery of a vehicle and adapted for communication with a first controller remote from the vehicle and vehicle charger is provided, and comprises a display; a user-manipulatable control; a second controller coupled to the display and operable to change a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging; and at least one of a transmitter and a receiver coupled to the second controller and adapted for communication with the first controller, the second controller responsive to at least one signal from the first controller by changing a charging state of the vehicle charger based at least in part upon the time of day entered by the user.
• Some embodiments of the present invention provide a vehicle charger for charging a battery of a vehicle, wherein the vehicle charger comprises a controller operable to change a supply of electric power to charge the battery during the course of a charging session by at least one of increasing a rate of charge of the battery, decreasing the rate of charge of the battery, starting battery charging, or stopping battery charging based at least in part upon a time of day, wherein the controller transmits a signal responsive to detection of an interruption of power supply to the vehicle charger.
• In some embodiments, a vehicle charger for charging a battery of a vehicle is provided, and comprises a controller; a vehicle charger battery coupled to the controller; and an electrical power cord releasably attachable to at least one of the vehicle and the vehicle charger battery to supply power from the vehicle charger battery to the battery of the vehicle, wherein the controller is operable to change a supply of electric power to the vehicle charger battery during the course of a charging session by at least one of increasing a rate of charge of the vehicle charger battery, decreasing the rate of charge of the vehicle charger battery, starting charging of the vehicle charger battery, or stopping charging of the vehicle charger battery based at least in part upon a time of day.
• Some embodiments of the present invention provide a vehicle charger for charging a battery of a vehicle, wherein the vehicle charger comprises a first core on the vehicle; a second core in a location stationary with respect to the first core, the second core providing an inductive charge to the first core in at least one position of the first core with respect to the second core; at least one sensor positioned to detect the position of the first core with respect to the second core; a display mounted within the vehicle within view of a user seated within the vehicle; and a controller coupled to the display and responsive to signals from the sensor to display at least one indicator on the display indicating a direction in which the vehicle must move for an improved positional relationship between the first and second cores.
• In some embodiments, a vehicle charger for charging a battery of a vehicle is provided, and comprises a controller; a first electrical connector coupled to the battery and the controller and located on one side of the vehicle; and a second electrical connector coupled to the battery and the controller and located on a different side of the vehicle, the first and second electrical connectors both shaped and dimensioned for releasable connection to an electrical power cord supplying power to the vehicle from an external power source.
• Some embodiments of the present invention provide a method of controlling charging of batteries of multiple vehicles each electrically connected to a power generation and distribution system, wherein the method comprises establishing communication with a controller associated with a battery charger of each vehicle; obtaining from each battery charger a time of day by which battery charging for the vehicle associated with the battery charger must be completed; and changing power supply to at least some of the battery chargers based at least in part upon the time of day received from the battery chargers.
BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 is a schematic diagram of a power generation and distribution system for a community.
• FIG. 2 illustrates a vehicular charging system according to an embodiment of the present invention.
• FIG. 3 illustrates a vehicular charging system according to another embodiment of the present invention.
• FIG. 4 illustrates a vehicular charging system according to another embodiment of the present invention.
• FIG. 5 is a perspective view of a vehicle charger according to an embodiment of the present invention.
• FIG. 6 is a perspective view of a portion of the vehicular charger illustrated inFIG. 5, shown in a first state.
• FIG. 7 is a perspective view of the vehicular charger illustrated inFIGS. 5 and 6, showing the vehicular charger in a second state.
• FIG. 8 is a perspective view of the vehicular charger illustrated inFIGS. 5-7, showing the vehicular charger in a third state.
• FIG. 9 is a perspective view of the vehicular charger illustrated inFIGS. 5-8, showing the vehicular charger in a fourth state.
• FIG. 10 is a perspective view of the vehicular charger illustrated inFIGS. 5-9, showing the vehicular charger in a fifth state.
• FIG. 11 is a perspective view of the vehicular charger illustrated inFIGS. 5-10, showing the vehicular charger in a sixth state.
• FIG. 12 is a perspective view of a portion of a vehicular charger according to another embodiment of the present invention.
• FIG. 13 illustrates a vehicle display according to an embodiment of the present invention.
• FIG. 14 illustrates another vehicle display according to an embodiment of the present invention.
• FIG. 15 is a schematic electrical diagram of a vehicular charging system according to an embodiment of the present invention.
• FIG. 16 is a schematic electrical diagram of a vehicular charging system according to another embodiment of the present invention.
• FIG. 17 is a schematic electrical diagram of a vehicular charging system according to another embodiment of the present invention.
• FIG. 18 a schematic diagram of a portion of a inductive vehicular charging system according to an embodiment of the present invention.
• FIG. 19 illustrates a vehicular display for the inductive vehicular charging system illustrated inFIG. 18.
• FIG. 20 is a side view of a vehicle and vehicular charger according to an embodiment of the present invention.
• FIG. 21 is a top view of the vehicle and vehicular charger shown inFIG. 19.
• FIG. 22 is a perspective view of the vehicle and vehicular charger shown inFIGS. 19 and 20.
• FIG. 23 is a perspective detail view of the vehicle and vehicular charger shown inFIGS. 19-21.
• FIG. 24 is a flowchart illustrating a method of operation of a vehicular charger according to an embodiment of the present invention.
• FIG. 25 is a flowchart illustrating a method of operation of a vehicular charger according to another embodiment of the present invention.
• FIG. 26 is a flowchart illustrating a method of operation of a vehicular charger according to another embodiment of the present invention.
• FIG. 27 is a flowchart illustrating a method of operation of a vehicular charger according to another embodiment of the present invention.
• FIG. 28 is a flowchart illustrating a method of operation of a vehicular charging system according to an embodiment of the present invention.
• FIG. 29 illustrates power draw from a power grid over a period of time, as controlled in part by a vehicular power charging system according to an embodiment of the present invention.
DETAILED DESCRIPTION
• Before any embodiments of the present invention are explained in detail, it is to be understood that the present invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the accompanying drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description, and should not be regarded as limiting. The use of “including,” “comprising,” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms “mounted,” “connected,” “supported,” and “coupled” and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings.
• A power generation and distribution system in which vehicle chargers and vehicle charging systems according to the present invention can be used is illustrated schematically inFIG. 1, and is indicated generally at10. Thesystem10 includes one or more sources ofpower12 that supply a community, such as one or more power plants generating electric power from natural gas, coal, water flow, nuclear power, geo-thermal power, wind, solar power, other power sources, and any combination thereof. Any number of sources ofpower12 can supply the electricity needs of the community, and can be located within the community and/or located distant from the community. For example, electric power can be generated in one or more power plants located in or nearby the community, whereas additional electric power can be supplied from other more distant power plants as needed in times of peak demand.
• Electric power is distributed from the sources ofpower12 in any conventional manner, such as by a number ofpower lines14 running from the sources ofpower12 to various locations in the community. Electric power can be further distributed within the community byadditional power lines14 and power distribution infrastructure. Such power lines and power distribution infrastructure (in their various forms) are known to those skilled in the art, and are not therefore described further herein.
• Electric power is transmitted over thepower lines14 to a number ofdifferent locations16 in the community, each of which draws and uses the electrical power for various purposes. One or moreelectric vehicles18,618,1018 are at some of these locations, and draw an amount of electric power for purposes of charging one ormore batteries20,620,1020 (seeFIGS. 2-4) of eachelectric vehicle18,618,1018. Eachelectric vehicle18,618,1018 in the community is releasably connected to thevehicular charging system10. In the illustrated embodiment ofFIGS. 2 and 3, eachelectric vehicle18,618 is releasably electrically and mechanically connected by arespective cord22,744 as will be described in greater detail below. In other embodiments (e.g.,FIG. 4), one or more of theelectric vehicles1018 are releasably electrically connected to thevehicular charging system10, but are not mechanically connected thereto. In such cases, theelectric vehicles1018 can be electrically connected by use of induction charging as described in greater detail below.
• Avehicle charging cord22 according to an embodiment of the present invention is illustrated inFIG. 5, and is shown in use inFIG. 2. The illustratedvehicle charging cord22 has afirst end24 adapted to releasably connect to an electrical outlet (not shown) of a business, residence, or other building or facility, and asecond end26 adapted to releasably connect to theelectric vehicle18. In this regard, thefirst end24 can have, for example, a standard U.S. two-prong or three-prong male electrical connector (i.e., grounded or ungrounded) intended for connection to a 120V AC supply of electric current, a U.S. Type B electrical connector intended for connection to a 220V AC supply of electric current, any electrical connector suitable for a 240V AC supply of electrical current, a Japanese Type B electrical connector meeting JA1-15 electrical standards, a British Type G electrical connector meeting British BS 1363 electrical standards, a European Type F electrical connector meeting CENELEC electrical standards, a French Type E electrical connector meeting French electrical standards, a Chinese Type I electrical connector meeting Chinese electrical standards, or a Type D or M electrical connector meeting Indian electrical standards. Any other releasable electrical connector suitable for connection to an electrical outlet of a building or facility, or for connection to a power cord, power device, or other power interface with the electrical system of the building or facility can be used as desired. In this regard, although thefirst end24 of thevehicle charging cord22 shown inFIG. 5 has a U.S. Type B plug, it will be appreciated that thefirst end24 can have any number and arrangement of blades, pins, and apertures for releasable mating engagement with an electrical connector of a power cord, power device, or other power interface as just described.
• Thesecond end26 of thevehicle charging cord22 can have any suitable plug for releasable connection with a mating electrical connector of the vehicle. In this regard, thesecond end26 of thevehicle charging cord22 can have any number of blades and/or pins for mating with associated apertures of the mating electrical connector of the vehicle, and can also or instead have any number of apertures for mating with associated blades and/or pins of the mating electrical connector of the vehicle. Thesecond end26 can be connected directly to an electrical connector of a vehicle, or to a power cord, power device, or other power interface with the electrical power system of a vehicle.
• Thevehicle charging cord22 can be any gauge suitable for carrying electric current to charge thevehicle18 and for also meeting country and local electrical codes. Also, thevehicle charging cord22 illustrated inFIG. 5 is insulated with flexible plastic or other suitable material.
• Thevehicle charging cord22 illustrated inFIGS. 2 and 5 also has ahousing28 intermediate theends24,26 of thecord22. In other embodiments, thehousing28 can be located at or define an end of thecord22, in which case thehousing28 can carry any of the electrical connectors described above with regard to ends24,26 of thevehicle charging cord22.
• The illustratedhousing28 has a substantially parallelepiped shape. Depending at least in part upon the shape and size of the electronics within the housing (described below) for performing any desired electrical transformer function, and the shape and size of the electrical elements used for the control features described below, thehousing28 can be larger or smaller than that shown inFIG. 5, and can have any other shape desired, (e.g., a cube shape, a spherical, elliptical, or other rotund shape, an irregular shape, and the like).
• With reference now toFIGS. 5-11, and also with reference toFIG. 15 (which illustrates a vehicular charging system utilizing the vehicular charger ofFIGS. 2, 5-11, a number of user-manipulatable controls30 and adisplay32 are provided on thehousing28. The illustratedhousing28 also contains electrical components for transforming power supplied thereto (indicated generally at136), and control circuitry for performing the vehicle battery charging management functions described in greater detail below. Thedisplay32 shown inFIGS. 5-11 and 15 is anLCD display32, although any other type of display can be used as desired. The user-manipulatable controls30 include apower button34, a number ofnavigation buttons36, and a select button38 (seeFIGS. 6-11). Thepower button34 can be pressed by a user to turn thevehicle charging cord22 on and off, thereby enabling and disabling thevehicle charging cord22 to charge one ormore batteries20 of avehicle18 connected thereto. Thenavigation buttons36 can be pressed by a user to navigate through one or more screens upon the display32 (described in greater detail below), whereas theselect button38 can be pressed by a user to select one or more options on the screen(s).
• In the illustrated embodiment, four navigation buttons36 (up, down, left, and right) are positioned around theselect button38, all of which are adjacent thepower button34. However, in other embodiments, thenavigation buttons36,select button38, andpower button34 can be in any other arrangement on thehousing28. Also, it will be appreciated that the user-manipulatable controls30 can be buttons as shown inFIGS. 5-11, but can instead or also be any other type of user-manipulatable control. For example, any of the user-manipulatable controls30 can be dome or tact switch, heat-sensitive, or other types of buttons, can be knobs or dials, and the like. Also, fewer or more user-manipulatable controls30 can be used in other embodiments, such as forvehicle charging cords22 not having a power button34 (i.e., automatically powered upon connection to a power source),vehicle charging cords22 having more or fewer navigation buttons (depending in some embodiments upon the arrangement of options onscreens32 shown on the display32), and the like.
• Although adisplay32 in conjunction with a number of button-type user-manipulatable controls34,36,40 is employed in the embodiment ofFIGS. 2, 5-11 and 15, in other embodiments, thedisplay32 and any number of the button-type user-manipulatable controls34,36,40 can be replaced by a touch screen (not shown). The touch screen can enable a user to display options, navigate between two or more screens, and select options by inputting commands directly into thedisplay32, and in some embodiments can simplify control of thevehicle charging cord22.
• With reference now toFIG. 15, in some embodiments, thevehicle charging cord22 has acontroller44 located within thehousing28 and at least partially controlling operations of thevehicle charging cord22. Thecontroller44 in the illustrated embodiment ofFIGS. 2, 5-11 and 15 is a programmable processor of any suitable type, but in some embodiments can take other forms such as non-programmable processor, a system of discrete logic elements, and any combination thereof. The illustratedvehicle charging cord22 also has atransceiver46 coupled to thecontroller44, enabling thecontroller44 to communicate with another controller. The other controller can be one or more processors of a personal computer, phone, PDA, or other processor-based device associated with a user of thevehicle charging cord22, one or more processors of a server or other computer associated with a power utility providing power to thevehicle charging cord22, and the like). In the illustrated embodiment ofFIGS. 2, 5-11 and 15, the other controller is a remote computer of apower utility48, and is indicated at50. Thecontroller50 of thepower utility48 is coupled to apower utility transceiver52 to enable thepower utility48 to communicate with thecontroller44 of thevehicle charging cord22.
• Thetransceiver46 of thevehicle charging cord22 and thetransceiver52 for the computer of thepower utility48 can each take any suitable form. However, it will be appreciated that thetransceiver52 for the computer of thepower utility48 can be selected to enable the computer of thepower utility48 to communicate with multiple vehiclecharging cord controllers44 of the same or different users. Also, thetransceiver46 of thevehicle charging cord22 and/or thetransceiver52 for the computer of thepower utility48 can be replaced by a separate transmitter and a separate receiver enabling two-way communication between thecontroller50 of thepower utility48 and thecontroller44 of thevehicle charging cord22. Such communication can be via the power lines14 (seeFIG. 1) between the computer of thepower utility48 and thelocations16 at which thevehicle charging cord22 is used. In this regard, reference herein and in the appended claims to a “receiver” and a “transmitter” is intended to encompass transceivers as well as separate receivers and transceivers.
• Any power line communication (PLC) system or combination of PLC systems adapted for carrying data overpower lines14 can be used for communication between thecontrollers44,50 described above, such as distribution line carrier (DLC) PLC systems, broadband over lines carrier (BLC) systems, low-speed narrow-band communication systems (proposed and used in Demand Side Management systems), and the like. Communication between thecontroller50 of thepower utility48 and thecontroller44 of thevehicle charging cord22 can be through any number of substations between thepower utility48 and thelocation16 at which thevehicle charging cord22 is used. Also, depending at least in part upon the PLC system(s) used, such communication can be through any number of repeaters as is well known to those skilled in the art of PLC systems.
• Thecontroller50 of the power utility48 (with which thecontroller44 of thevehicle charging cord22 communicates) can be located anywhere between thelocation16 of the user and the sources ofpower12. For example, thecontroller50 of thepower utility48 can be located at a facility where power is generated, at an office of thepower utility48, at any of a number of substations between the source ofpower12 and thelocation16 of the user, and the like.
• By connecting thefirst end24 of thevehicle charging cord22 to an electrical outlet of a building or facility (or to a power cord, power device, or other power interface with the electrical system of the building or facility), communication can be established over thevehicle charging cord22, the electrical system of the home, building, or other facility (e.g., through wiring and one or more circuit breakers thereof), and low and high-voltage power lines to thepower utility48 and thecontroller50 of thepower utility48 described above. In some embodiments, this communication can be established automatically upon plugging in thefirst end24 of thevehicle charging cord22, whereas in other embodiments, this communication is established when thevehicle charging cord22 is turned on or when a user enters an appropriate command to establish this communication (described in greater detail below), or in any other suitable manner. Communication between processors established automatically upon their connection are well known to those skilled in the art, and are not therefore described further herein.
• As discussed above, communication between thecontroller44 of thevehicle charging cord22 and thecontroller50 of thepower utility48 can be over power lines, wiring, or other conductors. However, it will be appreciated that communication along any portion or all of the distance between thecontroller50 of thepower utility48 and thevehicle charging cord22 can include wireless communication. In such cases, any number of wireless transmitters and receivers (and associated antennae) can be used to send and receive communications between thecontroller50 of thepower utility48 and thevehicle charging cord22. By way of example only, thevehicle charging cord22 can have a wireless processor and associated antenna, receiver, and transmitter enabling wireless communication with a wireless service provider, and ultimately to thecontroller50 of thepower utility48. Like the PLC communication described above, wireless communication between thecontroller50 of thepower utility48 and thevehicle charging cord22 can be established automatically upon plugging in thefirst end24 of thevehicle charging cord22, when thevehicle charging cord22 is turned on, or when a user enters an appropriate command to establish this communication (described in greater detail below).
• In some embodiments, thecontroller44 of thevehicle charging cord22 communicates with a user's computer rather than, or in addition to, communicating with thecontroller50 of thepower utility48. This communication can be any combination of wired or wireless communication. For example, a residence-based, office-based, or other facility-based PLC system can be used to communicate between thecontroller44 of thecharging cord22 and a user's computer (via the electrical system of the residence, office, or other facility). In other embodiments, thevehicle charging cord22 can have a wireless processor adapted for communication with a user's computer. Such communication can be through any suitable wireless personal area network (WPAN) (using, for example, ZigBee®, Bluetooth®, or any other WPAN wireless technology), wireless local area network (WLAN), and the like. Like the PLC communication described above, communication between thecontroller50 of thepower utility48 and the user's computer can be established automatically upon plugging in thefirst end24 of thevehicle charging cord22, when thevehicle charging cord22 is turned on, or when a user enters an appropriate command to establish this communication (described in greater detail below).
• Upon connection with a user's computer (wireless or otherwise), a user can control thevehicle charging cord22 in any of the same manners as apower utility48 described in greater detail below. Alternatively or in addition, communication between thecontroller44 of thevehicle charging cord22 and the controller of50 of thepower utility48 can be established through the user's computer. Specifically, wired or wireless communication between thecontroller44 of thevehicle charging cord22 and the user's computer can be used in conjunction with a connection between the user's computer and thecontroller50 of thepower utility48 to enable communication between thecontroller44 of thevehicle charging cord22 and thecontroller50 of thepower utility48. Such communication can thereby enable thepower utility48 to control the vehicle charging cord22 (in any of the manners described below) via the user's computer.
• With reference now toFIGS. 6-11, the illustratedvehicle charging cord22 has afirst screen40 providing information regarding thevehicle charging cord22, a battery connected thereto, and the status of charging operations of thevehicle charging cord22. In the illustrated embodiment ofFIGS. 2, 5-11 and 15, thescreen40 has a vehicle chargingcord status indicator42, which displays the status of charging operations. Thestatus indicator42 can indicate whether thevehicle charging cord22 is charging a battery, the type of charging operations being performed by thevehicle charging cord22, and/or whether an error in charging the battery has been detected.
• In the state of thevehicle charging cord22 shown inFIGS. 6, 10, and 11, thevehicle charging cord22 is not charging a battery connected thereto, nor is thevehicle charging cord22 programmed or otherwise controlled to charge a battery (described in greater detail below). Accordingly, thestatus indicator42 displays “OFF”. In the state of thevehicle charging cord22 shown inFIG. 7, thevehicle charging cord22 is in the process of charging a vehicle battery in “manual” mode (i.e., not based upon a time of day). Therefore, thestatus indicator42 displays “MANUAL CHARGE IN PROCESS” inFIG. 7. In the state of thevehicle charging cord22 shown inFIG. 8, thevehicle charging cord22 is in the process of charging a battery based upon one or more instructions that can include a time of day to begin charging the battery and/or a time of day to stop battery charging (discussed in greater detail below). Accordingly, thestatus indicator42 displays “PROGRAMMED CHARGE IN PROCESS” inFIG. 8. Finally, in the state of thevehicle charging cord22 shown inFIG. 9, an error has been detected by thevehicle charging cord22 in the process of attempting to charge the battery. Therefore, thestatus indicator42 display “ERROR—BATTERY FAULT” inFIG. 9. In some embodiments, thevehicle charging cord22 can have appropriate circuitry to detect a variety of charging problems, including without limitation a damaged battery, a damagedvehicle charging cord22, a disconnection between thevehicle charging cord22 and a source of power used to charge the vehicle battery, and/or a disconnection between thevehicle charging cord22 and the battery to be charged. A large number of conventional circuits capable of detecting such problems exist, and are not therefore described further herein. Such circuits fall within the spirit and scope of the present invention.
• Thefirst screen40 of thevehicle charging cord22 illustrated inFIGS. 2, 5-11 and 15 also has acommunication status indicator54. Thecommunication status indicator54 indicates whether communication exists between thecontroller44 of thevehicle charging cord22 and a computer (e.g., a computer of thepower utility48, the user's computer, a mobile phone, PDA, or other processor-based device as described above, and the like). For example, in the “OFF” state of thevehicle charging cord22 illustrated inFIG. 6, no communication exists between thecontroller44 of thevehicle charging cord22 and a computer, so thecommunication status indicator54 displays an appropriate indicator. In the other states of thevehicular charging cord22 illustrated inFIGS. 7-11, including the states ofFIGS. 10 and 11 where thevehicle charging cord22 is in an “OFF” state but is not set to charge a battery, communication has been established and maintained between thecontroller44 and a computer, so thecommunication status indicator54 displays an indicator showing this status.
• Thefirst screen40 of thevehicle charging cord22 illustrated inFIGS. 2, 5-11 and 15 also has a powerconnection status indicator56. The powerconnection status indicator56 indicates whether an electrical connection exists between thevehicle charging cord22 and a source of power (e.g., an electrical system of a house, office, facility, or other location) to charge a battery. When thefirst end24 of the illustratedvehicle charging cord22 is unplugged or is connected to an electrical system not providing power to thevehicle charging cord22, the powerconnection status indicator56 displays such an indicator (see, for example,FIG. 6). Otherwise, if a proper power connection is made, theconnection status indicator56 displays an appropriate indicator showing that such a connection has been made (see, for example,FIGS. 7-11).
• Aclock58 is also displayed on thefirst screen40 shown inFIGS. 6-9. Any form of clock can be displayed as desired, preferably indicating whether the displayed time is “A.M.” or “P.M.”. In some embodiments, time on theclock58 is maintained by thecontroller44 of thevehicle charging cord22, and can be maintained even if no power is supplied to the vehicle charging cord22 (e.g., when thevehicle charging cord22 is unplugged) by a battery of thevehicle charging cord22. Such a battery (not shown) can be connected to thecontroller44 of thevehicle charging cord22, can be located within thehousing28, and in some embodiments can be removed and replaced by a user as necessary via a door or other battery cover (also not shown). In these and other embodiments, the time displayed upon theclock58 can be retrieved and displayed by thecontroller44 from a computer upon establishment of communication with the computer in any of the manners described above.
• Thefirst screen40 of thevehicle charging cord22 illustrated inFIGS. 2, 5-11 and 15 also has a batterycharge level indicator60. Using any battery diagnostic circuitry desired, thecontroller44 of thevehicle charging cord22 can detect the level of charge of abattery20 to which thevehicle charging cord22 is connected (e.g., by the plug on thesecond end26 of thevehicle charging cord22 described above). The batterycharge level indicator60 illustrated inFIGS. 6-9 is a bar chart displaying charges ranging from 0% to 100%, and also displaying the percentage of full charge of avehicle battery20 to which thevehicle charging cord22 is connected (e.g., 31% inFIG. 6). However, other types of batterycharge level indicators60 can be used in other embodiments.
• For example, the batterycharge level indicator60 can be simply a number (e.g., the percentage of full charge of thebattery20, the exact charge level of the battery in amp-hours or in another unit of measurement, another number representative of the amount of charge of thebattery20 but not necessarily in units conventionally used to indicate battery charge, and the like). As another example, the batterycharge level indicator60 can also or instead include any other chart or visual representation, such as a pie chart, an escalating series of bars having different lengths, a symbol having different colors and/or brightness levels representing different battery charge levels, a gauge with a needle or other pointer, text in any language indicating the level of battery charge (e.g., “empty, very low, low, high, full”), and the like. The batterycharge level indicator60 can comprise any graphics, text, or combination of graphics and text to convey the level of charge of thebattery20 to a user, and can be any size desired on thefirst screen40. Thecontroller44 of thevehicular charging cord22 can monitor the charge level of thebattery20 being charged, and can update the batterycharge level indicator60 continuously or on a periodic basis.
• In some embodiments, thefirst screen40 of thevehicular charging cord22 also displays the voltage and/or amperage used to charge abattery20 connected thereto. These voltage and/or amperage indicators are included in the embodiment of thevehicle charging cord22 shown inFIGS. 2, 5-11 and 15, and are givenreference numbers62 and64, respectively.
• As also shown inFIGS. 6-9, thefirst screen40 of thevehicle charging cord22 can include other information regarding the status of a battery charging session performed by thevehicular charging cord22, including the amount of time estimated to completely charge the battery20 (in minutes, minutes and hours, or in any other format), the estimated or actual amount of power already consumed during the present charging session (in kWh or in any other unit of measurement), the actual or estimated cost of charging the connectedbattery20 per hour or other unit time, and/or the total actual or estimated cost of the current charging session to the present time. Each of these examples of information is displayed on thefirst screen40 shown inFIGS. 6-9, and is indicated withreference numbers66,68,70, and72, respectively.
• The chargetime remaining indicator66 and the power usedindicator68 can be calculated by thecontroller44 in any of a number of manners well known to those in the art of battery charging and electrical power metering technology. In this regard, it will be appreciated that the charge time remaining can be calculated taking into account the non-linear rate of charging formany batteries20, wherein the rate of battery charge at different levels of battery charge changes. Formulas for such estimates are well known to those skilled in the art of battery charging, and are not therefore described further herein. The charge cost perhour indicator70 can be retrieved and displayed by thecontroller44 from a computer upon establishment of communication with the computer in any of the manners described above, or can be manually entered into thevehicle charging cord22 by a user using the user-manipulatable controls30 and an appropriate data entry cell or menu on the display32 (not shown). In those embodiments in which the charge cost per hour is retrieved from another computer as described above, thecontroller44 can retrieve a cost per kWh figure directly from the power utility48 (e.g., from thecontroller50 of a computer of the power utility48), from the user's computer in which is stored a cost per kWh figure entered there or retrieved by the user's computer, and the like, and can multiply that figure by an estimated kWh level at which thevehicle charging cord22 will charge thebattery20 to display the charge cost perhour70 for the current battery charging session. The total cost to the present time for acharging session72 can be calculated by thecontroller44 simply by multiplying the values ofindicators68 and70 together.
• In some embodiments, any or all of theindicators66,68,70, and72 can be updated periodically during a charging session, such as every second, minute, or other time interval. Any or all of theindicators66,68,70,72 can be continually updated by receiving streaming data from thecontroller50 of thepower utility48 or from the user's computer. For example, the chargetime remaining indicator66 can be updated by thecontroller44 every second or minute based upon battery charge calculations made at the beginning of the charging session or made periodically during the charging session. As another example, the power used indicator can be updated by thecontroller44 every second, minute, or in greater periods of time based upon the actual or estimated power delivered via thevehicle charging cord22. As yet another example, the charge cost perhour indicator70 can be updated every second, minute or other time period based upon cost information retrieved by thecontroller44 from thecontroller50 of thepower utility48 or the user's computer, and/or can be updated immediately upon receiving streaming or batch-loaded power cost information from thecontroller50 of thepower utility48 or the user's computer.
• Thefirst screen40 of thevehicle charging cord22 illustrated inFIGS. 2, 5-11 and 15 also has abattery charge selector74 by which a user can select the manner in which thevehicle charging cord22 will charge avehicle battery20. By pressing thenavigation buttons36 and then theselect button38 described above, a user can highlight a desired manner in which thevehicle charging cord22 will charge avehicle battery20 connected thereto. The battery charge selector options illustrated inFIGS. 6-9 include “OFF”, “PROGRAMMED CHARGE”, AND “MANUAL CHARGE”, any of which can be highlighted and selected by a user as just described. Although a radio button format of thebattery charge selector74 is illustrated in the embodiment ofFIGS. 2, 5-11 and 15, thebattery charge selector74 can have any other form desired, including without limitation a drop-down or pop-up menu, and the like. Upon selecting the desired charge state as just described, thevehicle charging cord22 can immediately begin a charging session by beginning to supply current to thebattery20 to which thevehicle charging cord22 is connected (e.g., by closing aswitch92 coupled to thecontroller44 as described in greater detail below), or can begin such a session after a user then presses thepower button34. For example, if thepower button34 is selected after the “MANUAL CHARGE” button has been selected, thecontroller44 can causes theswitch92 to close without delay in order to begin charging thevehicle battery20, whereas if thepower button34 is selected after the “PROGRAMMED CHARGE” button has been selected, thecontroller44 can cause theswitch92 to close only after one or more conditions have been met as will be described in greater detail below. In any case, once a user commands and enables thevehicle charging cord22 to begin charging immediately or to begin charging at a later time based upon a set of instructions as described elsewhere herein, a vehicle charging session begins.
• The operational status of thevehicle charging cord22 can be displayed by thevehicle charging cord22 in a number of different manners and locations. For example, the vehicle chargingcord status indicator42 described above can be provided. Alternatively or in addition, one or more graphics (e.g., symbols, colors, and the like) providing the same general status indicators (e.g., off, charging in process, error) can be displayed elsewhere on thehousing28, such as through a translucent or transparent portion of thehousing28, through a lens located on thehousing28, and the like. In this regard, one or more graphics can be printed on the interior and/or exterior of thehousing28, can be invisible or substantially not visible to a user when not illuminated, and can be illuminated by one or more lamps, LEDs or other light sources within thehousing28 when such graphics are to be displayed. By way of example only, thecontroller44 can display a battery charging symbol such as that shown inFIGS. 7 and 8 in a first chargestatus display area76A when a charging session is in process, or when thevehicle charging cord22 is in the process of charging a battery20 (as described in greater detail below, thebattery20 may not be actively charging thebattery20 at one or more times during a charging session). As another example, thecontroller44 can display an error symbol such as that shown inFIG. 9 in the same or a different chargestatus display area76B when any of the battery charging errors described above have been detected. Still other battery charging symbols indicating any other information regarding the status of thevehicle charging cord22 and its operation can be displayed anywhere on the housing as a supplement to or in addition to the information shown on thedisplay32 described above. In some embodiments, one or morestatus display areas76 as just described can even replace thedisplay32.
• With continued reference to the illustrated embodiment ofFIGS. 2, 5-11 and 15, in some embodiments, thecontroller44 of thevehicle charging cord22 can display two or more different screens upon thedisplay32. This control enables a user to view substantially more information than that available from other types of displays and from other types of controls and indicators on thehousing28. By way of example only, two suchalternative screens40A,40B are illustrated inFIGS. 10 and 11, respectively, and can be accessed in a number of different manners. In some embodiments, eachscreen40,40A,40B is accessed by selecting a navigation button, such as by usingnavigation button36 in the illustrated embodiment to highlight a desired navigation button on thescreen40,40A,40B. In other embodiments, one ormore navigation buttons36 on thehousing28 are provided to move betweenscreens40,40A,40B, such as forward and back buttons, a single button to scroll though two ormore screens40,40A,40B, and the like. Although threedifferent screens40,40A,40B can be shown upon thedisplay32 in the illustrated embodiment ofFIGS. 2, 5-11 and 15, any other number of displays (e.g., 1, 2, 4, or more) can be shown upon thedisplay32, and can include any number and arrangement of the indicators, selectors, and other information described herein. In still other embodiments, asingle screen40 is provided, only a portion of which is visible on thedisplay32 at any given time. In such cases, other portions of thescreen40 can be viewed by scrolling in any desired direction using one ormore navigation buttons36 or other user-manipulatable controls on thehousing28.
• In the illustrated embodiment ofFIGS. 2, 5-11 and 15, thefirst screen40 has twonavigation buttons78,80, each of which causes the controller to display adifferent screen40A,40B when selected by a user in the manner described above. When a first “PROGRAM A CHARGE”navigation button78 is selected by a user, thecontroller44 replaces thefirst screen40 with asecond screen40A shown inFIG. 10. Thissecond screen40A enables a user to change the manner in which thevehicle charging cord22 will operate to charge one ormore batteries20 connected thereto. Thesecond screen40A also hasnavigation buttons82,84 that can be selected by a user to return to thefirst screen40, whether by making one or more changes to operation of the vehicle charging cord22 (by selecting the “GO” navigation button84), or by making no changes to operation of the vehicle charging cord22 (by selecting the “CANCEL” navigation button84). In the illustrated embodiment, selection of eithernavigation button82,84 on thesecond screen40A will return the user to thefirst screen40.
• A valuable feature of thevehicle charging cord22 ofFIGS. 2, 5-11 and 15 is the ability of a user to at least partially control when thevehicle charging cord22 will begin to charge one ormore batteries20 connected thereto. In many geographic locations, times of day, and times of the year, the ability ofpower utilities48 to supply the full power demand of users is limited or is inadequate. Although power utilities can often generate or otherwise obtain additional power at peak periods, such power often comes at a higher price to thepower utility48. Regardless of whether a higher price is paid by the utility, higher power prices are often charged to consumers of thepower utility22 during peak periods. In many cases,power utilities48 encourage their customers to consume power at non-peak periods, such as a nighttime, and often give significant discounts to those who consume power during such periods. Thevehicle charging cord22 ofFIGS. 2, 5-11 and 15 enables the user to take advantage of such cost savings by controlling when vehicle battery charging will occur. Even in those cases where savings to the power consumer are not provided, thevehicle charging cord22 can be used to reduce power draw uponpower utilities48 at peak times and/or to better manage power consumption.
• With reference toFIG. 10, thesecond screen40A (entitled the “Programmed Charge” screen inFIG. 10) can show any amount of the information shown on thefirst screen40 described above, such as the vehicle chargingcord status indicator42, thecommunication status indicator54, the powerconnection status indicator56, and theclock58. Thesecond screen40A enables a user to select a time at which thevehicle charging cord22 will begin charging abattery20 connected thereto. For this purpose, thesecond screen40A has abutton86 that can be selected (e.g., by user manipulation of the navigation andselect buttons36,38 as described above) to set thevehicle charging cord22 to begin charging at a desired time of day. This time of day can be changed and set by one or moretime change buttons88, such as by using thenavigation buttons36 to highlight one of thetime change buttons88 and by using theselect button38 to change thecharge start time90 displayed on thesecond screen40A. Any other manner of changing and selecting a desired time can be used as desired, including without limitation drop down or pull-up menus displaying various charge start times that can be selected.
• Once a charge start time has been selected by a user as just described, the user can select thenavigation button82 described above to return to thefirst screen40, and can command thevehicle charging cord22 to begin a charging session by pressing thepower button34. By doing so, thecontroller44 of thevehicle charging cord22 will compare thestart time90 entered by the user to the current time of day (e.g., displayed by theclock58 as described above), and will begin charging thebattery20 at the enteredcharge start time90. With reference toFIG. 15, thevehicle charging cord22 can have a relay or otherelectrical switch92 coupled to thecontroller44 and operable by thecontroller40 to close at thecharge start time90. Once thecharge start time90 has been reached, thecontroller40 can automatically close theswitch92, thereby supplying a current to thebattery20 for charging thebattery20. Theswitch92 can remain closed until thecontroller40 detects that thebattery20 is fully or sufficiently charged, until an error in charging is detected (as described above), or in some embodiments until a charge stop time or other triggering event occurs. When any such condition is reached, theswitch92 can open, thereby stopping current flow to thebattery20 and stopping the battery charging process. Thevehicle charging cord22 can be provided with any battery charge circuitry suitable for charging thebattery20. Such battery charge circuitry is well know, and can include one or more voltmeters and/or amp meters for this purpose.
• For example, thevehicle charging cord22 illustrated inFIGS. 2, 5-11 and 15 includes anamp meter94 and avolt meter96 electrically coupled to apower line98 supplying power to thebattery20. Thecontroller44 can utilize information from theamp meter94 and/orvolt meter96 to determine whether thebattery20 is fully charged, and to automatically stop charging the battery20 (e.g., by opening the switch92) when thebattery20 is fully charged.
• Accordingly, thevehicle charging cord22 can be programmed to begin charging abattery20 connected thereto at any time of day desired by a user. A user can therefore select an off-peak power time, and in some applications when the cost of power is reduced.
• It will be appreciated that the time selected by a user to begin charging thebattery20 may not be the most optimal time for apower utility48 to supply power for charging thebattery20. For example, in an emergency or during an unexpected surge of power demand, an otherwise off-peak time to begin charging thebattery20 may not be desirable for thepower utility20. As another example, widespread use of thevehicle charging cord22 may result in surges of power demand at particular off-peak times, such as at midnight, 1 a.m., 2 a.m., or other charge start times that may be commonly selected by users in programming thevehicle charging cord22 as described above. Another valuable feature of thevehicle charging cord22 illustrated inFIGS. 2, 5-11 and 15 can help to reduce or eliminate these problems. With reference again toFIG. 10, thesecond screen40A has anotherbutton100 that can be selected (e.g., by user manipulation of the navigation andselect buttons36,38 as described above) to set thevehicle charging cord22 to complete charging by a desired time of day. This time of day can be changed and set by one or moretime change buttons102, such as by using thenavigation buttons36 to highlight one of thetime change buttons102 and by using theselect button38 to change thecharge completion time104 displayed on thesecond screen40A. Any other manner of changing and selecting a desired time can be used as desired, including without limitation drop down or pull-up menus displaying various charge start times that can be selected.
• Once a charge start time has been selected by a user as just described, the user can select thenavigation button82 described above to return to thefirst screen40, and can command thevehicle charging cord22 to begin a charging session by pressing thepower button34. In such cases, thecontroller44 receives thecharge completion time90 and can delay the start time at which battery charging will commence based upon one or more factors (described below).
• In some embodiments, thecontroller44 automatically retrieves power information from amemory106 coupled to thecontroller44. This power information can include the cost of power per unit time, one or more pre-set times, and the like, and can be saved in thememory106 by thecontroller44. Thecontroller44 can receive the power information from thetransceiver46 of thevehicle charging cord22, which can receive the power information in communication with thecontroller50 andtransceiver52 of thepower utility48 and/or in communication with the user's computer. This communication can occur in any of the manners described above regarding the communication between thecontrollers44,50 and/or between thecontroller44 and the user's computer. In this regard, the information can be originally produced by thepower utility48, or can be produced by a user entering the information into the user's computer for transfer to thecontroller44 andmemory106 of thevehicle charging cord22.
• Thecontroller44 can delay the time at which battery charging will begin based upon the power information just described, whether stored in thememory106 of thevehicle charging cord22 or retrieved from thepower utility48 without being stored in thememory106. In some embodiments, the battery charging start determined by thecontroller44 can be based upon a threshold cost of power reached over a period of time. This cost of power can be received periodically by thecontroller44 from thepower utility48, such as by thecontroller44 of thevehicle charging cord22 polling thecontroller50 of thepower utility48, or by thecontroller50 of thepower utility48 regularly sending or streaming updated cost of power information to thecontroller44 of thevehicle charging cord22. Upon reaching a desired cost of power (e.g., $0.50/hr., $0.45/hr., $0.40/hr.), thecontroller44 of thevehicle charging cord44 can automatically cause theswitch92 to close, thereby charging thevehicle battery20. This threshold cost of power can be input by a user into thevehicle charging cord22 in any of the manners described above in connection with other information entry, such as by another data entry field similar to that of the desired charge starttime90 or the desiredcharge completion time104.
• In some embodiments, thecontroller44 can also automatically cause theswitch92 to open if a desired cost of power threshold is reached, thereby interrupting battery charging. In such cases, battery charging can resume in the same manner as it began when the cost of power lowers as detected by thecontroller44 of thevehicle charging cord22. Any number of interruptions and resumptions in charging thevehicle battery20 can take place in this manner.
• In some embodiments, thecontroller44 detects a command from the user to begin a charging session, and through communication with thecontroller50 of the power utility48 (whether initiated by thecontroller44 of thevehicle charging cord22 or initiated by thecontroller50 of thepower utility48 by periodic polling or in any other manner), provides a signal to thecontroller50 of thepower utility48 that a charging session has been requested. Upon receiving this signal, thecontroller50 of thepower utility48 can request or otherwise receive thecharge completion time104 from thecontroller44 of thevehicle charging cord22. In some embodiments, additional information regarding the charging session can also be received, such as the level of charge of thebattery20 connected to thevehicle charging cord22, and/or the estimated charge time remaining (discussed above in connection with the charge time remaining indicator66). Still other information can be received by thecontroller50 of thepower utility48, such as the capacity of thebattery20, the battery type, the manufacturer of thebattery20, the model or other identification information of thebattery20, and/or the battery age.
• Any or all of this information can be retrieved by or transmitted to thecontroller44 of thevehicle charging cord44 by communication with acontroller108 of the battery20 (i.e., forbatteries20 having an integrated circuit or other controller adapted for communication with another controller, otherwise known as “smart batteries”) or vehicle. For example, the battery capacity, type, manufacturer, model or other identification information, and/or age can be stored in a memory (not shown) of thebattery20 coupled to and accessible by acontroller108 of thebattery20. This information can be stored in the memory of thebattery20 by the manufacturer, supplier, and/or servicer of thebattery20, or in some embodiments by a user. As another example, any or all of this information can be stored in a memory (not shown) of thevehicle18 coupled to and accessible by acontroller108 of thevehicle18. This information can be stored in the memory of thevehicle18 by the manufacturer, supplier, and/or servicer of thevehicle18, or in some embodiments by a user. For example, upon installation of a battery into thevehicle18, the installer can access thecontroller108 of thevehicle18 in a conventional manner to record the battery capacity, type, manufacturer, model or other identification information, and/or age in a memory associated with thevehicle18. Any of this information can be transmitted to or retrieved by thecontroller44 of thevehicle charging cord22 automatically upon connection to thevehicle18 or at any other time, and in some embodiments can be stored in thememory106 of thevehicle charging cord22. In some embodiments, any of this information can then be retrieved from thememory106 of thevehicle charging cord22 and/or from the memory of thevehicle18 for transmission to thecontroller50 of thepower utility48 or for determining when to begin charging abattery20 based upon any of the embodiments described herein.
• Based upon the battery information obtained by thepower utility48 as described above, thepower utility48 can determine an desirable time to begin charging thebattery20 connected to thevehicle charging cord22. This time can be based upon a number of factors that are specific to the requested charging session, such as the charge time completion for the requested charging session, as well as other factors that are independent of the requested charging session, such as the current and anticipated power draw by other customers of thepower utility48, and/or the current and anticipated cost of power to thepower utility48. Accordingly, based upon the battery information obtained by thepower utility48, thepower utility48 can control when thevehicle charging cord22 starts to charge thebattery20 connected thereto. This control can occur, for example, by sending a signal from thecontroller50 of thepower utility48 to thecontroller44 of thevehicle charging cord22 at a desired start time to trigger closure of theswitch92, or by sending a signal from thecontroller50 of thepower utility48 to thecontroller44 of thevehicle charging cord22 to close theswitch92 at a particular future time (which time can be stored in thememory106 of thevehicle charging cord22 or can begin a timer counting to that particular time of day), or in other manners. In this manner, thepower utility48 can maintain a degree of control over power draw while still following an instruction by the user to complete a vehicle charging session by a desired time.
• As just described, in some embodiments thepower utility48 can control when thevehicle charging cord22 begins charging abattery20 connected thereto. Alternatively or in addition, in some embodiments thepower utility48 can interrupt charging of avehicle battery20 in the event that it is desirable to delay the remainder of the charging process, such as during a surge of demand occurring while abattery20 is being charged, in an emergency, and the like. This interruption can occur, for example, by sending a signal from thecontroller50 of thepower utility48 to thecontroller44 of thevehicle charging cord22 at a desired interruption time to trigger theswitch92 to open, or by sending a signal from thecontroller50 of thepower utility48 to thecontroller44 of thevehicle charging cord22 to open theswitch92 at a particular future time (which time can be stored in thememory106 of thevehicle charging cord22 or can begin a timer counting to that particular time of day), or in other manners. Thepower utility48 can resume charging thevehicle battery20 in the same manner as described above in connection with beginning to charge thevehicle battery20. Any number of interruptions and resumptions in charging thevehicle battery20 can take place based upon the desires and needs of thepower utility48 and the power draw upon thepower utility48.
• Although it is desirable in some applications to delay the time at which charging of thevehicle battery20 will begin based upon any of the embodiments described herein, it is also desirable in many cases to insure that a minimum level of battery power is immediately available to the user. This minimum level of battery power can be needed, for example, in case of emergency, or in the event that the user unexpectedly needs use of thevehicle18. In such cases, thevehicle charging cord22 illustrated inFIGS. 2, 5-11 and 15 has another valuable feature. With particular reference toFIG. 10, thesecond screen40A of the illustratedvehicle charging cord22 has abutton110 that can be selected (e.g., by user manipulation of the navigation andselect buttons36,38 as described above) to set thevehicle charging cord22 to immediately begin charging thebattery20 until a minimum threshold level of battery charge has been reached regardless of whether a programmed charge has also been selected as described above. This minimum threshold level of battery charge can be changed and set by one or morecharge level buttons112, such as by using thenavigation buttons36 to highlight one of thecharge level buttons112 and by using theselect button38 to change the minimum threshold level ofbattery charge114 displayed on thesecond screen40A. Any other manner of changing and selecting a desired minimum level of battery charge can be used as desired, including without limitation drop down or pull-up menus displaying various levels of battery charge that can be selected.
• When thebutton110 is selected (and in some embodiments, after the user selects thenavigation button82 described above to return to thefirst screen40, and after the user commands thevehicle charging cord22 to begin a charging session by pressing the power button34), thecontroller44 determines whether the charge level of thevehicle battery20 connected thereto is below the threshold input by the user. The battery charge level can be determined as described above. If the battery charge level is below the threshold input by the user, or in some cases at or below the threshold input by the user, thecontroller44 of thevehicle charging cord22 automatically causes theswitch92 to close, thereby charging thevehicle battery20 without delay. If the user has also requested a programmed charge as described above, thevehicle charging cord22 continues to charge thevehicle battery20 until the minimum threshold level ofbattery charge114 has been reached. At this time, thevehicle charging cord22 resumes operation in programmed mode. For example, if thecharge start time90 has already passed or if the current cost of power is below the desired cost of power as described above, thecontroller44 can continue to charge thevehicle battery20, and can do so without interruption following battery charging to the minimum threshold level of battery charge as just described. As another example, if thepower utility48 had determined that thevehicle battery20 should be charged (e.g., based at least in part upon acharge completion time104 entered by a user as also described above), thecontroller44 can continue to charge thevehicle battery20, and can do so without interruption following battery charging to the minimum threshold level of battery charge as just described.
• Of course, if thevehicle charging cord22 is operating in a manual charge mode (e.g., not based upon a time of day as selected usingbuttons86 and100), thevehicle charging cord22 can begin to charge thevehicle battery20 immediately after the user presses thepower button34, regardless of the degree to which the battery charge has been depleted.
• In some embodiments, user control over additional functions and features of thevehicle charging cord22 is enabled by further controls and menus. Additional controls and menus can be shown on thedisplay32 in either or both of thescreens40,40A described above, or in any number of additional screens. By way of example only, thevehicle charging cord22 of the embodiment illustrated inFIGS. 2, 5-11 and 15 has athird screen40B shown inFIG. 11. Thisthird screen40B can be a utilities screen accessed by a user when the “UTILITIES”navigation button80 is selected in a manner as described above. Thethird screen40B also hasnavigation buttons116,118 that can be selected by a user to return to thefirst screen40, whether by making one or more changes to operation of the vehicle charging cord22 (by selecting the “GO” navigation button116), or by making no changes to operation of the vehicle charging cord22 (by selecting the “CANCEL” navigation button118). In the illustrated embodiment, selection of eithernavigation button116,118 on thethird screen40B will return the user to thefirst screen40.
• With continued reference toFIG. 11, thethird screen40B can show any amount of the information shown on thefirst screen40 described above, such as the vehicle chargingcord status indicator42, thecommunication status indicator54, the powerconnection status indicator56, and theclock58. Thethird screen40B can include a batterycharge rate selector120 enabling a user to change the amperage at which thevehicle charging cord22 charges abattery20 connected to thevehicle charging cord22. This amperage can be changed and set by one or moreamperage level buttons122, such as by using thenavigation buttons36 to highlight one of theamperage level buttons122 and by using theselect button38 to change the amperage of thevehicle charging cord22 displayed on thethird screen40B. Any other manner of changing and selecting a charging amperage can be used as desired, including without limitation drop down or pull-up menus displaying various charging amperages that can be selected. Although not shown inFIG. 11, in other embodiments, a similar selector can be used to also or instead change the voltage at which thevehicle charging cord22 charges abattery20 connected to thevehicle charging cord22.
• Additional features that can be used in any of the vehicle charging cord embodiments described and/or illustrated herein relate to communication settings of thevehicle charging cord22. For example, thethird screen40B of thevehicle charging cord22 illustrated inFIGS. 2, 5-11 and 15 includes aselector124 that can be selected by a user to enable and disable Bluetooth® wireless communication with another controller, such as the processor of a user's computer. In other embodiments, the same or different selector can be used to enable and disable other types of wireless and wired communication with another controller. Thethird screen40B of the illustrated embodiment also has aselector126 that can be selected by a user to enable and disable wireless and/or wired communication with apower utility48.
• In some embodiments, thecontroller44 of thevehicle charging cord22 can send a communication to the user in the event that one or more different events associated with a vehicle charging session occur. By way of example only, by using conventional power detection circuitry, thecontroller44 can detect when a supply of power to thevehicle charging cord22 has been interrupted, such as in a power failure in the electrical system of the user, at the power utility, or anywhere in between. Identifying and communicating this status to a user can be very important to the user, enabling the user to find another source of electrical power to charge the user'svehicle18, or at least enabling the user to make appropriate plans based upon the existing level of charge in thevehicle battery20. As another example, and by using conventional battery diagnostic circuitry, thecontroller44 can detect when thebattery20 connected thereto is fully charged or has reached any other level of charge (e.g., a minimum battery charge level as described above). Still other events that can be detected and communicated to the user include a battery fault condition, a problem with thevehicle charging cord22, and the like.
• Upon detection of any of the events just described, thecontroller44 of thevehicle charging cord22 can send a communication to the user providing notice of the event. For example, thethird screen40B of thevehicle charging cord22 shown inFIG. 11 includes aselector128 that can be selected by a user to enable and disable thecontroller44 automatically sending a communication indicating that power supply to thevehicle charging cord22 has been interrupted. As another example, thethird screen40B of thevehicle charging cord22 shown inFIG. 11 includes aselector130 that can be selected by a user to enable and disable thecontroller44 automatically sending a communication indicating that thebattery20 to which thevehicle charging cord22 is connected is fully charged.
• Thecontroller44 of thevehicle charging cord22 can communicate any of the events described above in a number of different manners. For example, thevehicle charging cord22 can have a speaker or other sound emitting device (not shown) coupled to thecontroller44 and capable of emitting an auditory alarm when any of the above-described events have occurred. The audible alarm can be emitted once upon the occurrence of the event, or can be emitted upon the occurrence of the event and at periodic times (e.g., every 5 minutes, every hour, and the like) after the occurrence of the event. As another example, thecontroller44 of thevehicle charging cord22 can transmit a wired or wireless signal to the user's computer and/or to the power utility48 (i.e., to thecontroller50 of the power utility48) in any of the manners of communication described above in connection with thecontroller50. Such a signal can automatically trigger a visual or auditory alarm or other notice via the user's computer and/or thecontroller50 of thepower utility48, such as by automatically generating a text message or e-mail from thecontroller50 of thepower utility48 to a computer, phone, PDA, or other device of the user, by automatically generating a text message or e-mail from the user's computer to a phone, PDA, or other device of the user, by displaying an alert on the user's computer, and the like. Another mode of communication to the user include an automatically generated telephone call from the power utility48 (triggered by and/or under control of the controller50) or the user's computer to a phone of the user, followed by an automatically generated voice message communicating the event and played by phone to the user when the phone is answered. Still other modes of alerting the user to any of the events described above are possible, and fall within the spirit and scope of the present invention.
• In the illustrated embodiment ofFIGS. 2, 5-11 and 15, thecontroller44 of thevehicle charging cord22 responds to detection of power interruption or completion of battery charge by either causing an e-mail to be sent to the user and/or by generating an auditory alarm from thevehicle charging cord22 based upon whetherrespective selectors132,134 for such modes of communication are selected on thethird screen40B illustrated inFIG. 11. In other embodiments, other modes of communication can be similarly enabled and disabled by selection of other selectors.
• FIG. 12 illustrates another embodiment of a vehicle charging cord according to the present invention. This embodiment employs much of the same structure and has many of the same properties as the embodiments of the vehicle charging cord described above in connection withFIGS. 2, 5-11 and 15. Accordingly, the following description focuses primarily upon the structure and features that are different the embodiments described above in connection withFIGS. 2, 5-11 and 15. Reference should be made to the description above in connection withFIGS. 2, 5-11 and 15 for additional information regarding the structure and features, and possible alternatives to the structure and features of the vehicle charging cord illustrated inFIG. 12 and described below. Structure and features of the embodiment shown inFIG. 12 that correspond to structure and features of the embodiment ofFIGS. 2, 5-11 and 15 are designated hereinafter in the 200 and 300 series of reference numbers.
• The embodiment of thevehicle charging cord222 shown inFIG. 12 provides an example of how the various indicators, selectors, and user-manipulatable controls can take different forms and be located in different positions and arrangements on thehousing228, and how thevehicle charging cord222 can have any sub-combination of the features and elements described above (e.g., any sub-combination of the various indicators, selectors, and user-manipulatable controls described above). The illustratedvehicular charging cord222 does not have an LCD display as shown in the embodiment ofFIGS. 2, 5-11 and 15, and instead has a number of LED displays and indicators. For example, the illustratedvehicular charging cord222 utilizes an LED display for the batterycharge level indicator260,clock258, chargetime remaining indicator266, power usedindicator268, charge cost perhour indicator270,total cost indicator272, and charge start time/charge completion time indicator290,304 (both of which are combined into a common indicator as shown). As another example, the illustratedvehicular charging cord222 utilizes individual LED lights for the vehicle chargingcord status indicator242 and thecommunication status indicator254. The use of LED displays and LED lights can reduce manufacturing costs of thevehicle charging cord222, and in some embodiments can provide a design of thevehicle charging cord222 less susceptible to damage compared to the use of LCD and other displays.
• As described above in connection with the illustrated embodiment ofFIGS. 2, 5-11 and 15, the batterycharge level indicator260 andclock258 can display information in any form desired. For example, the batterycharge level indicator260 shown inFIG. 12 is a numerical percentage of full charge, but can take any of the other forms described above in connection with the batterycharge level indicator60 of the embodiment ofFIGS. 2, 5-11 and 15.
• In contrast to theselectors74 on thefirst screen40 in the embodiment ofFIGS. 2, 5-11 and 15, theselectors274 in the illustrated embodiment ofFIG. 12 are individual buttons of any conventional type, including any of the button types described above in connection with the power, navigation, andselect buttons34,36,38 of the embodiment ofFIGS. 2, 5-11 and 15. By pressing any of the fourbuttons274, a user can start a manual charge, start a programmed charge of the type described above in connection with thecharge start time90 illustrated inFIG. 10 (i.e., start charging at a time entered by the user), start a programmed charge of the type described above in connection with thecharge completion time104 illustrated inFIG. 10 (i.e., start charging based upon power utility control and complete charging by a time entered by the user), and stop thevehicle charging cord222 from charging abattery20 connected thereto.
• Also, in contrast to thetime change buttons88,102 on thesecond screen40A in the embodiment ofFIGS. 2, 5-11 and 15, the time change buttons288,302 in the illustrated embodiment ofFIG. 12 are mechanical buttons of any type, including any of the button types described above in connection with the power, navigation, andselect buttons34,36,38 of the embodiment ofFIGS. 2, 5-11 and 15. By pressing on the buttons288,302 to the left of the charge start time/charge completion time indicator290,304, the hour of the time displayed by the charge start time/charge completion time indicator290,304 can be adjusted, whereas by pressing on the buttons288,302 to the right of the charge start time/charge completion time indicator290,304, the minutes of the time displayed by the charge start time/charge completion time indicator290,304 can be adjusted. In other embodiments, any other number, position, and type of time change buttons can be used to adjust the time on the charge start time/charge completion time indicator290,304. Following entry of a desired time, a user can press any of the first three selectors274 (followed in some embodiments by pressing the power button234) to begin a charging session.
• Although LEDs are used in the illustrated embodiment ofFIG. 12 for various indicators andselectors258,260,242,254,266,268,270,272,290,304, any other type of light-emitting device can instead be used as desired.
• The various embodiments of thevehicle charging cords22,222 described above and illustrated inFIGS. 2, 5-12 and 15 can provide significant advantages relating to the portability of thevehicle charging cords22,222. By virtue of the fact that the opposite ends24,26 of thevehicle charging cords22,222 are releasably connected to an electrical system providing a source of electrical power and to thebattery20 of a vehicle, respectively, and by virtue of the fact that the other components of the vehiclecharging cord cords22,222 are contained within a housing to define a single integral unit, thevehicle charging cords22,222 are portable, can be readily moved from vehicle to vehicle, can thereby be used to charge any number of different vehicles, and can be moved into and out of (and can be transported by) vehicles with ease. Also,portable charging cords22,222 of the type described above and illustrated inFIGS. 2, 5-12 and 15 can be purchased by a user and can be releasably connected to thebattery20 of avehicle18, thereby eliminating the need to service thevehicle18 or to the electrical system at which the vehicle will be charged. This can be particularly useful in cases where the ability to charge thebattery20 of thevehicle18 in different locations only having standard electrical outlets (and otherwise not being specially adapted to charge electric vehicles) is important or desirable.
• In other embodiments, either end24,26 of thecharging cord22,222 can be permanently secured to the electrical system of the house, building, or other facility and/or to thevehicle18,218, respectively. For example, oneend24 of thecharging cord22,222 can be permanently secured to the electrical system of the house, building, or other facility (i.e., not intended or adapted for removal by a user, such as by being wired directly into a junction box or circuit breaker of the electrical system of the house, building, or other facility). In such cases, thecharging cord22,222 can be wound upon and stored in a floor standing, wall-mounted, or ceiling-mounted reel (not shown), such as those disclosed in U.S. Pat. No. 6,439,360, the entire disclosure of which is incorporated herein by reference. The reel can be spring-loaded to enable thevehicle charging cord22,222 to be easily wound upon the reel for storage, or can be manually turned for this purpose. In such embodiments, the majority, all, or almost all of the length of thecharging cord22,222 can be defined between thehousing28,228 and the end226 of thecharging cord22,222 intended for connection to the electrical system of the facility. In this manner, the majority or almost all of thevehicle charging cord22,222 can be conveniently stored. Such vehicle charging cords provide a significant benefit to users desiring to charge two ormore vehicles18,218 at the same facility using the samevehicle charging cord22,222, such as for charging onevehicle18,218 during the day and for charging anothervehicle18,218 at night using the samevehicle charging cord22,222. The use of onevehicle charging cord22,222 for two ormore vehicles18,218 can provide significant cost savings to the user(s) of thevehicles18,218.
• As another example, oneend26 of thecharging cord22,222 can be permanently secured to thevehicle18,218 (i.e., not intended or adapted for removal by a user, such as by being permanently connected to one or more wiring harnesses of the vehicle, or by being connected to an electrical junction box or fuse box of thevehicle18,218). In such cases, thecharging cord22,222 can also be wound upon and stored on a reel (not shown) carried by thevehicle18,218, such as the reels disclosed in U.S. Pat. No. 6,439,360 and incorporated by reference above. The reel can be mounted directly to the frame of thevehicle18,218, an interior surface of a body part of thevehicle18,218, to a bracket or other fixture (e.g., radiator mounting bracket, alternator or battery mounting bracket, and the like) of thevehicle18,218, to the front or rear bumper of thevehicle18,218, or to any other location providing suitable strength to carry the reel andvehicle charging cord18,218. As described above, the reel can be spring-loaded to enable thevehicle charging cord22,222 to be easily wound upon the reel for storage on the vehicle, or can be manually turned for this purpose. In such embodiments, the majority, all, or almost all of the length of thecharging cord22,222 can be defined between thehousing28,228 and the end224 of thecharging cord22,222 intended for connection to thevehicle18,218. In this manner, the majority or almost all of thevehicle charging cord22,222 can be conveniently stored on the vehicle. The vehicle-mountedvehicle charging cord22,222 provides a significant benefit for users needing to charge theirvehicle battery20,220 in multiple locations, as thevehicle charging cord22,222 is conveniently carried by thevehicle18,218 from destination to destination.
• Although reel-based vehicle charging cords as just described are described in connection withvehicle charging cords22,222 not intended for release by a user from both thevehicle18,218 and the electrical system of the facility, it should be noted that the other portable vehicle charging cord embodiments described and/or illustrated herein (i.e., those intended for user release at both ends) can also include a spring-loaded or non-spring-loaded reel as just described. In this manner, suchvehicle charging cords22,222 can be quickly and conveniently placed in a relatively portable and compact state.
• FIGS. 13, 14, and 16 illustrate an embodiment of a vehicle charging system according to the present invention. This embodiment employs much of the same structure and has many of the same properties as the embodiments of the vehicle charging cord described above in connection withFIGS. 2, 5-12 and 15. Accordingly, the following description focuses primarily upon the structure and features that are different the embodiments described above in connection withFIGS. 2, 5-12 and 15. Reference should be made to the description above in connection withFIGS. 2, 5-12 and 15 for additional information regarding the structure and features, and possible alternatives to the structure and features of the vehicle charging system illustrated inFIGS. 13, 14, and 16 and described below. Structure and features of the embodiment shown inFIGS. 13, 14, and 16 that correspond to structure and features of the embodiment ofFIGS. 2, 5-12 and 15 are designated hereinafter in the 400 and 500 series of reference numbers.
• Despite the significant advantages provided by the portablevehicle charging cords22,222 described above in connection withFIGS. 2, 5-12 and 15, other significant advantages are realized by incorporating the elements and features of thevehicle charging cords22,222 into avehicle18. With reference toFIGS. 13, 14, and 16, the illustrated vehicle charging system uses much of the same elements and features described above in connection with the various embodiments of thevehicle charging cords22,222. In this regard,FIG. 13 illustrates a portion of the dashboard of avehicle18, and includes a batterycharge level indicator460 integrated into the same part of the vehicle dashboard as anoil temperature indicator538. Also integrated into the same portion of the dashboard, by way of example only, is a vehiclecharging status indicator442. The vehiclecharging status indicator442 shown inFIG. 13 can be similar to the chargestatus display area76 described above in connection with thevehicle charging cord22 ofFIGS. 2, 5-11 and 15. Accordingly, one or more lights can be used to illuminate the words “MANUAL CHARGING IN PROCESS” when the vehicle battery charging system is in a manual charging mode as described above, whereas one or more other lights can be used to illuminate the words “PROGRAMMED CHARGE IN PROCESS” when the vehicle battery charging system is in a programmed charging mode as also described above. Any other manner of displaying the vehiclecharging status indicator442 can be used as desired, including without limitation an LED or LCD display, one or more lamps adjacent printed graphics, and the like.
• With continued reference to the illustrated embodiment ofFIGS. 13, 14, and 16, the illustrated vehicle charging system can include adisplay432 located in the console of thevehicle18. As used herein, the term “console” refers to any portion of the interior of a vehicle (i.e., in the interior passenger cabin of the vehicle) having one or more manual or electronic controls for controlling operation of avehicle18 and/or one or more indicators showing the status of vehicle operation. For example, the console of avehicle18 can include a dashboard having a speedometer, odometer, RPM gauge, oil temperature gauge, and the like, a navigation screen with associated indicators and/or controls, HVAC indicators and controls, an entertainment center (e.g., radio, DVD or other video system, CD, MP3 or other audio system, and the like) with associated indicators and controls, environmental temperature indicators, travel direction indicators, and the like. The console can be located immediately in front of the driver, to either side of the driver, in central forward area of the vehicle cabin, in an area between the driver's seat and an adjacent passenger seat, in an interior location on the roof or otherwise at a higher elevation than a horizontal line of sight of the user, and the like. Also, the console of the vehicle can extend to and be positioned in any combination of these interior vehicle locations, such as a single console including the dashboard and central area between the driver and passenger seats.
• In some embodiments, the selectors and indicators (including any displays) of the vehicle charging system are located in their own dedicated console, whereas in other embodiments, the console carrying such features also carries other vehicle indicators and controls. Also, the selectors and indicators (including any displays) of the vehicle charging system can be located in two or more consoles, if desired, such as one or more indicators located in the dashboard console of thevehicle18 and the remainder located in another console located between the driver and passenger at the front of the passenger compartment. Any combination of selectors and indicators located in any combination of vehicle consoles is possible, and falls within the spirit and scope of the present invention.
• Thedisplay432 shown inFIG. 14 is atouch screen display432, and includes many of the same indicators and selectors used in the vehicle charging cord embodiments described above in connection withFIGS. 2, 5-11 and 15. In particular, thedisplay432 includes a chargetime remaining indicator466, power usedindicator468, charge cost perhour indicator470, andtotal cost indicator472 like those of thevehicle charging cords22,222 described and illustrated above. Also, the illustrateddisplay432 includes another vehiclecharging status indicator442 that can be used in addition to or in place of that shown inFIG. 13, and acommunication status indicator454 and powerconnection status indicator456 similar to those described above in connection with the illustrated embodiment ofFIGS. 2, 5-11 and 15. Although a clock can also be included on thedisplay432, a clock is not included in thedisplay432 ofFIG. 14 in lieu of another clock of thevehicle18 located elsewhere on the dashboard or console of thevehicle18. This other clock can be connected to the same controller444 (seeFIG. 16) as the rest of the vehicle charging system, thereby providing thecontroller444 with the time of day information needed to begin programmed charging operations as described above.
• Thedisplay432 illustrated inFIG. 14 can display multiple screens440 to be shown upon thedisplay432, thereby enabling a significantly greater amount of battery and battery charging information to be shown on the display, and/or enabling a greater degree of control over the vehicle charging system. Like thevehicle charging cords22,222 described above, navigation between screens440 on thedisplay432 is enabled by navigation buttons on the screens. For example, the screen440 shown inFIG. 14 includes twonavigation buttons478,480 like those of the illustrated embodiment ofFIGS. 2, 5-11 and 15 described above. By pressing one of the navigation buttons478 (entitled “PROGRAMMED CHARGE SETUP”), the screen440 is replaced by a charge programming screen (not shown) having any or all of the indicators andselectors42,54,56,58,82,84,86,88,90,100,102,104,110,112, and/or114 described above in connection with thesecond screen40A inFIG. 10. These indicators and selectors can have the same or any other arrangement upon the programming screen. By pressing the other navigation button480 (entitled “UTILITIES”), the screen440 is replaced by a utilities screen (also not shown) having any or all of the indicators andselectors42,54,56,58,116,118,120,122,124,126,128,130,132, and/or134 described above in connection with thethird screen40B inFIG. 11. These indicators and selectors can have the same or any other arrangement upon the utilities screen.
• To begin or stop a manual or programmed charging session, the embodiment of the present invention illustrated inFIGS. 13, 14, and 16 can include a single power button that in some embodiments can change text to indicate whether a selection can be made by a user to start or stop a charging session (e.g., changing from “START CHARGE” to “STOP CHARGE” once a user selects “START CHARGE”, or changing from “STOP CHARGE” to “START CHARGE” once the user selects “STOP CHARGE”). In other embodiments, such as that shown inFIGS. 13, 14, and 16, the screen440 can includeseparate buttons434A,434B to start or stop a charging session, such as to start a manual charge if none of the selectors for a programmed charge have been selected on a programming screen, or to start a programmed charge of any type described herein.
• Although the in-console display432 illustrated inFIG. 14 is atouch screen display432, thedisplay432 can be any other type of display, such as the other types of displays described and illustrated herein. For example, thetouch screen display432 can be replaced by a display such as that shown inFIGS. 5-11 orFIG. 12, in which cases the vehicle charging system can include navigation buttons (e.g., adjacent the display432) enabling a user to navigate through a screen and to select any selectors upon thedisplay432. As another example, thetouch screen display432 can be replaced by any combination of buttons, switches, dials, or other user-manipulatable controls; LEDs and other lights; and displays (e.g., seeFIG. 12).
• A schematic diagram of the vehicle charging system in which an in-console display432 is utilized and/or in which the in-console vehicle charging selectors and indicators are otherwise utilized is shown inFIG. 16. Like the embodiments ofFIGS. 2, 5-12 and 15 described above, the system illustrated inFIG. 16 is releasably coupled to a source ofpower412 operated and controlled by apower utility448 having atransceiver452 and controller444 (e.g., a computer) that can communicate via a PLC system with thecontroller444 of the vehicle charging system. In the illustrated embodiment ofFIG. 16, however, thedisplay432 and other controls and indicators are located in one or more in-cabin consoles of thevehicle418. Therefore, apower cord540 having ends424,426 described above in connection with the embodiments ofFIGS. 2, 5-12 and 15 (but without the housing and other components carried in or on the housing) can be used to releasably connect thebattery420 of thevehicle418 with the electrical system of the facility used to charge thebattery420 as also described above. As with the earlier-described embodiments, thepower cord540 can be releasably coupled to thevehicle418, and in other embodiments can instead be stored on-board thevehicle418 when not in use (e.g., by a cord reel mounted on the vehicle as described above). Also as with the earlier-described embodiments, thepower cord540 can also or instead be releasably coupled to the electrical system of the house, office, or other facility to enable thepower cord540 to be more readily and easily moved within and removed from the facility, or can be permanently connected to the electrical system.
• With continued reference toFIG. 16, the illustrated vehicle charging system also includes atransceiver446 for communication between thecontroller444 on board thevehicle418 and thetransceiver452 and controller440 of thepower utility448, apower transformer536, anamp meter494, avolt meter496, aswitch492, and amemory506 performing the same functions described above in conjunction with the embodiments ofFIGS. 2, 5-12, and 15. It should be noted that thecontroller444 of the vehicle charging system can be a dedicated controller (e.g., a processor or set of discrete logic elements) separate from the other controllers of the vehicle (e.g., those used to control vehicle startup, vehicle access and security, and engine operation, smart battery controllers, and the like), or can be the same as such other controller(s). Accordingly, the electronics of the vehicle charging system according to some embodiments of the present invention can be fully or partially integrated into one or more other controllers of the vehicle, or can be separate therefrom. In either case, thecontroller444 can be located within a housing (not shown), and can be connected via suitable wiring harnesses or other wired or wireless electrical connections to an electrical connector on the vehicle (adapted for releasable mating connection to an external power cord as described above) or to a power cord carried by the vehicle as also described above. Similarly, thememory506,transceiver446, and clock can be dedicated solely for operation of the vehicle charging system as described in earlier embodiments, or can instead be shared by other systems of thevehicle418.
• The vehicle charging system shown inFIG. 16 can function in the same manners described above in connection with the embodiments ofFIGS. 2, 5-12, and 15, it being understood that communications, power control, programming, and other features of the vehicle charging system are performed on-board thevehicle418 rather than in a vehicle charging cord as shown inFIGS. 2, 5-12, and 15. Accordingly, power supply and communications in the embodiment ofFIG. 16 can include power supply and communications over one or more suitable power cords, wiring harnesses, and the like of the vehicle performing the same functions (including PLC and power transmission functions) as the flexible power cords on both sides of thehousings28,228 illustrated inFIGS. 2 and 5-12.
• FIG. 3 illustrates another embodiment of a vehicle charging system according to the present invention. This embodiment employs much of the same structure and has many of the same properties as the embodiments of the vehicle charging cord described above in connection withFIGS. 2, 5-12 and 15. Accordingly, the following description focuses primarily upon the structure and features that are different the embodiments described above in connection withFIGS. 2, 5-12 and 15. Reference should be made to the description above in connection withFIGS. 2, 5-12 and 15 for additional information regarding the structure and features, and possible alternatives to the structure and features of the vehicle charging system illustrated inFIG. 3 and described below. Structure and features of the embodiment shown inFIG. 3 that correspond to structure and features of the embodiment ofFIGS. 2, 5-12 and 15 are designated hereinafter in the 600 and 700 series of reference numbers.
• The vehicle charging system illustrated inFIG. 3 operates in substantially the same manner as that ofFIGS. 2, 5-12 and 15. However, in the illustrated embodiment ofFIG. 3, the vehicle charging system is embodied in acabinet742. Thecabinet742 performs functions similar to thehousings28,228 described and illustrated herein, such as to house the controller, transformer, and other electronics of the vehicle charging system. In some embodiments, thecabinet742 can be wall-mounted and/or floor-mounted (such as that shown inFIG. 3).
• Thecabinet742 of the vehicle charging system can include a display732 having any of the features and performing any of the functions described above in connection with thedisplays32 of the embodiments shown inFIGS. 2, 5-11, 14, and 15. The display732 can be a touch screen display or any other type of display as described herein, and can be accompanied by any number and type of user manipulatable controls (e.g., navigation buttons) as also described herein. Any combination of selectors and indicators (including displays) described and/or illustrated herein can be provided on the cabinet to perform the vehicle charging functions also described herein.
• In some embodiments, thecabinet742 is provided with apower cord744 terminating in aplug624 that can be releasably connected to a vehicle618 (and to thebattery620 thereof). Theplug624 can take any of the forms described above in connection with the embodiments ofFIGS. 2, 5-12, and 15. In some embodiments, thepower cord744 can be stored on a reel (not shown) in or adjacent thecabinet742. The reel can take any of the forms described above in connection with other embodiments of the present invention. Although thecabinet742 can provide a convenient location for storage of thepower cord744, thepower cord744 can instead be permanently or releasably coupled to thevehicle618 for storage on thevehicle618 when thepower cord744 is not in use. For example, thepower cord744 can be stored upon a reel of thevehicle618 as described in greater detail above. In those embodiments in which thepower cord744 is intended to be stored and carried by thevehicle618, thepower cord744 can have an opposite end terminating in a plug (such as any of the plugs described above in connection withplug26 shown inFIG. 5). Thecabinet742 can be provided with any number of electrical connectors for releasable mating engagement with the plug (and for any number of other plugs onpower cords744 extending to other vehicles618).
• FIG. 17 illustrates another embodiment of a vehicle charging system according to the present invention. This embodiment employs much of the same structure and has many of the same properties as the embodiments of the vehicle charging system described above in connection withFIGS. 2, 3, and 5-16. Accordingly, the following description focuses primarily upon the structure and features that are different the embodiments described above in connection withFIGS. 2, 3, and 5-16. Reference should be made to the description above in connection withFIGS. 2, 3, and 5-16 for additional information regarding the structure and features, and possible alternatives to the structure and features of the vehicle charging system illustrated inFIG. 17 and described below. Structure and features of the embodiment shown inFIG. 17 that correspond to structure and features of the embodiments ofFIGS. 2, 3, and 5-16 are designated hereinafter in the 800 and 900 series of reference numbers.
• Like the embodiment ofFIGS. 2, 3, and 5-16, the vehicle charging system ofFIG. 17 also includes atransceiver846 for communication between acontroller844 and thetransceiver852 andcontroller840 of thepower utility848, apower transformer836, anamp meter894, avolt meter896, aswitch892, and amemory906 performing the same functions described above in conjunction with the embodiments ofFIGS. 2, 5-12, and 15. Aclock858,display832, and associated user-manipulatable controls as described above (or other types and combinations of selectors and indicators, with or without displays) are also included for providing information to the user and for receiving instructions from the user in any of the manners also described above.
• The vehicle charging system ofFIG. 17 includes abattery946 that can be charged in any of the same manual or programmed manners described above in connection with the embodiments ofFIGS. 2, 3, and 5-16. Thebattery946 is separate from thebattery920 of thevehicle918, and can have any size sufficient for at least partially charging thebattery920 of thevehicle918 when connected thereto. Rather than or in addition to charging abattery920 of thevehicle918 as described herein in connection with other embodiments of the present invention, the vehicle charging system ofFIG. 17 operates to charge thebattery946 that remains at the house, building, or other facility at which vehicle charging takes place. Thebattery946 therefore functions as a reservoir of power that can collect and store a charge for later transfer tobatteries946 of one ormore vehicles918. Accordingly, although thebattery946 can have any size suitable for charging abattery920 of avehicle918, in some embodiments thebattery946 has a capacity capable of fully charging thebattery920 of at least onevehicle918 when thebattery920 of thevehicle918 has no charge or substantially no charge.
• Thebattery946 can be located anywhere in a house, building, or other facility where vehicle battery charging is desired, and in some embodiments is located an a garage in which the vehicle is stored. For example, thebattery946 can be stored in a cabinet also housing the rest of the vehicle charging system (e.g., in a lower portion of thecabinet742 illustrated inFIG. 3). In some embodiments, thebattery946 can be sufficiently oversized (in voltage, current, or capacity) for completely charging a drainedvehicle battery920 connected thereto so that improved or optimized battery charging conditions can be achieved. Thebattery946 can also be oversized to carry sufficient charge for charging two or more fully or substantially dischargedvehicle batteries920. Also, in some embodiments, the vehicle charging system can have one or more power converters (e.g., DC to DC converters) to increase the output voltage of thebattery946 sufficiently for charging thevehicle battery920.
• With continued reference to the illustrated embodiment ofFIG. 17, the vehicle charging system can include an additional relay or otherelectrical switch948 coupled to thecontroller844. Theswitch948 can enable a user to begin charging thebattery920 of avehicle918 connected to the vehicle charging system only when desired. Accordingly, thecontroller844 can send a signal to close theswitch948 upon receiving a command from a user (e.g., via a user-manipulatable control having any of the forms described herein) to begin charging thebattery920 of avehicle918 connected thereto. Like the other embodiments described and illustrated herein, theswitch948 can be controlled by a user and/or can be controlled by apower utility948 via thetransceivers846,852 andcontrollers840,844.
• By virtue of thebattery946 in the embodiment ofFIG. 17, control over a community's power draw needed for chargingvehicles918 is greatly increased. Rather than wait until avehicle918 is connected to the electrical system of a house, building, or other facility in order to supply power to charge thebattery920 of thevehicle918, the user orpower utility848 can be free to supply vehicle battery charging power at any convenient time. For example, if thepower utility848 has a period of relatively low daytime demand that is unexpected (such as a drop in power draw during an otherwise peak or high demand time), thepower utility848 can begin charging thebattery946 regardless of whether thevehicle918 is in another location. This flexibility can enable thepower utility848 to independently send relatively low-cost battery charging power—and/or for the user to independently draw relatively low-cost battery charging power—at times of power surplus regardless of the location of thevehicle918 to be charged.
• In some embodiments, the vehicle charging system ofFIG. 17 can also operate in a manner similar to the embodiments ofFIGS. 2, 3, and 5-16, whereby a user can connect thebattery920 of thevehicle918 for charging, and thebattery920 can be charged in any manual or programmed mode by closure of theswitches892,948 under control of thecontroller844. Such charging can take place without draining thebattery946 described above (such as by a suitable electrical bypass around the battery946), or can be supplemented by any amount of charge existing in thebattery946. In this regard, if the cost for charging or partially charging thebattery946 of the vehicle charging system is higher than the calculated cost of charging thebattery920 of thevehicle918 at the desired charging start time (both figures being available to thecontroller844 as described above, and being storable in and retrievable from thememory906 as desired), thecontroller844 can control theswitches892,948 to charge thevehicle battery920 using the charge from thesystem battery946 first. If the opposite is true, thecontroller844 can control theswitches892,948 to charge thevehicle battery920 using power directly from thepower utility848 without draining thesystem battery946. These operating conditions can be continually monitored by thecontroller844, which in some embodiments can automatically react to changing power supply costs while charging is in process by changing the source of charging current (i.e.,system battery946 or power utility848).
• The vehicle charging system ofFIG. 17 is illustrated in the form of a portable vehicle charging cord, such as the embodiments ofFIGS. 2, 5-12, and 15. However, the features of the vehicle charging system ofFIG. 17 can be incorporated into any of the vehicle charging system embodiments described and/or illustrated herein, including those illustrated inFIGS. 3, 13, 14, 16, andFIGS. 4, 18, and 19 (described below).
• FIGS. 4, 18, and 19 illustrate another embodiment of a vehicle charging system according to the present invention. This embodiment employs much of the same structure and has many of the same properties as the embodiments of the vehicle charging systems described above in connection withFIGS. 2, 3, and 5-17. Accordingly, the following description focuses primarily upon the structure and features that are different the embodiments described above in connection withFIGS. 2, 3, and 5-17. Reference should be made to the description above in connection withFIGS. 2, 3, and 5-17 for additional information regarding the structure and features, and possible alternatives to the structure and features of the vehicle charging system illustrated inFIGS. 4, 18, and 19 and described below. Structure and features of the embodiment shown inFIGS. 4, 18, and 19 that correspond to structure and features of the embodiments ofFIGS. 2, 3, and 5-17 are designated hereinafter in the 1000 and 1100 series of reference numbers.
• The vehicle charging system illustrated inFIGS. 4, 18, and 19 has the same components and features as described above in connection with the on-board vehicle charging system ofFIGS. 13, 14, and 16, but is further adapted for charging thebattery1020 of thevehicle1018 by induction charging. Accordingly, the vehicle charging system illustrated inFIGS. 4, 18, and 19 has atouch screen display1032 having a chargetime remaining indicator1066, power usedindicator1068, charge cost perhour indicator1070, andtotal cost indicator1072 as described in greater detail in the embodiments above. Also, the illustrateddisplay1032 includes a vehicle charging status indicator1042 (not shown inFIG. 19, but in the text banner at the top of the illustrateddisplay1032 inFIG. 19 when docking is not in process), acommunication status indicator1054, and a powerconnection status indicator1056 as described in greater detail in the embodiments above.
• Thedisplay1032 illustrated inFIG. 19 can displaymultiple screens1040 to be shown upon thedisplay1032, thereby enabling a significantly greater amount of battery and battery charging information to be shown on the display, and/or enabling a greater degree of control over the vehicle charging system. Navigation betweenscreens1040 on thedisplay1032 is enabled by navigation buttons on thescreens1040. For example, thescreen1040 shown inFIG. 19 includes twonavigation buttons1078,1080 for navigation to programming and utility screens as described in greater detail in the embodiments above. Also, thescreen1040 hasseparate buttons1034A,1034B to start or stop a charging session.
• Although the in-console display1032 illustrated inFIG. 19 is atouch screen display1032, thedisplay1032 can be any other type of display, such as the other types of displays described and illustrated herein. For example, thetouch screen display1032 can be replaced by a display such as that shown inFIGS. 5-11 orFIG. 12, in which cases the vehicle charging system can include navigation buttons (e.g., adjacent the display1032) enabling a user to navigate through a screen and to select any selectors upon thedisplay1032. As another example, thetouch screen display1032 can be replaced by any combination of buttons, switches, dials, or other user-manipulatable controls; LEDs and other lights; and displays (e.g., seeFIG. 12).
• With reference now toFIG. 4, the vehicle charging system ofFIGS. 4, 18, and 19 utilizes a conventional battery induction charging system in order to charge thebattery1020 of thevehicle1018, and includes acharging pad1150 having a power supply core (not shown) energized to supply power via induction to a power receiving core of the vehicle (shown schematically at1152 inFIG. 18). By way of example only, an inductive vehicular battery charger system that can be used is disclosed in U.S. Pat. No. 6,525,510, the entire contents of which are incorporated herein by reference. The power supply core of thecharging pad1150 is electrically connected to and receives power from a vehicular charger that is the same as that described above in connection with the embodiment ofFIG. 3. In particular, the core of thecharging pad1150 is electrically connected to the electrical system of the house, building, or other facility at which charging is to take place via a below-ground or above-ground power line1144 extending to acabinet1142 having any of the selectors and indicators (including display(s)) described above in connection withFIG. 3. In this regard, any of the alternative vehicle charger features and structures also described above in connection with the embodiment ofFIG. 3 can also be applied in the inductive vehicular charging system ofFIGS. 4, 18, and 19.
• As is well known to those in the art of inductive battery charging, proper alignment between the power supply core and the power receiving core of the battery charger is important for efficient battery charging. In the illustrated embodiment ofFIGS. 4, 18, and 19, this alignment can be achieved by user operation of thevehicle1018. In particular, one ormore sensors1154 can be provided on thevehicle1018 and can be positioned to detect the presence and proximity of thevehicle charging pad1150 and core thereof. Thesensors1154 can be inductive sensors adapted to detect the presence ofmetallic elements1156 in thevehicle charging pad1150 or having known positions with respect to thevehicle charging pad1150 and core. Alternatively, thesensors1154 can be Hall Effect sensors adapted to detect the magnetic field of magnets or electromagnets having known positions on or with respect to thevehicle charging pad1150 and core. In other embodiments, thesensors1154 can be RFID sensors adapted to detect the position of one or more RFID transmitters having known positions on or with respect to thevehicle charging pad1150 and core. Still other types ofsensors1154 can instead be used, including without limitation optical sensors, eddy current sensors, and ultrasonic sensors for use in conjunction with optical, eddy current, and ultrasonic sensing and position systems, all of which operate on principles well-known to those skilled in the art. By detecting the distance between the sensor(s)1154 on thevehicle1018 and one or more reference points on the charging pad1150 (or having known positions with respect to the charging pad1150), the position of the sensor(s)1154 with respect to thecharging pad1150 can be identified via triangulation. Triangulation systems operating to detect the relative position of objects based upon any of these technologies are well-known to those skilled in the art, and are not therefore described further herein.
• In other embodiments, the locations of thesensors1154 and the elements1156 (e.g.,metallic elements1156, magnets or electromagnets, RFID transmitters, and the like, as described above) detected by thesensors1154 can be reversed, whereby one or more of thesensors1154 can be located on thecharging pad1150 or located at known positions with respect to thecharging pad1150 for detecting one or more elements1156 (e.g.,metallic elements1156, magnets or electromagnets, RFID transmitters, and the like, as described above) of thevehicle1018.
• The controller (not shown) of the inductive vehicle charging system illustrated inFIGS. 4, 18, and 19 receives signals from the sensor(s)1154 described above, and based upon a conventional triangulation algorithm as described above, determines the direction in which thevehicle1018 must move for desired alignment of the vehicle1018 (and power receiving core connected to thebattery1020 of the vehicle1018) with respect to thecharging pad1150 and core thereof. Upon making this determination, the controller can display directional instructions to the user. In the illustrated embodiment ofFIGS. 4, 18, and 19,directional indicators1160 are displayed on the sametouch screen display1032 described above, along with atext line1162 noting the direction thevehicle1018 should move for proper charging alignment. In other embodiments, this information can be provided on another display (e.g., on a display located in a console of the vehicle1018), or can be located on another type of display (not necessarily a touch screen). Also, in some embodiments, this information can be presented without adisplay1032, such as by illumination of one or more LEDs or other lights to illuminate an arrow or other symbol, text, or any combination of symbols and text providing directional instructions to the user.
• By way of example only, thetouch screen display1032 illustrated inFIG. 19presents text1162 indicating the direction in which the user should move thevehicle1018 for proper charging alignment, presentsarrow symbols1160 in any combination (e.g., forward, rearward, left, right) around a graphical depiction of thevehicle1164, and also displays a graphical depiction of thefront wheels1166 turned in the direction needed for proper charging alignment. Any combination of these and other alignment symbols andtext instructions1168 can be displayed to the user to indicate how thevehicle1018 should be moved for proper charging alignment. Such symbols and/ortext1168 can be updated continuously or periodically as the position of thesensors1154 andvehicle1018 change with respect to thecharging pad1150 and core thereof, until alignment within a predetermined acceptable error calculated by the controller is achieved. In some embodiments, the control(s) selected to begin a charging session (e.g., the “START CHARGE”selector1034A on thetouch screen display1032 of the illustrated embodiment) are disabled until such alignment is achieved.
• By utilizing thesensors1154, sensedelements1156, andalignment indicators1168 as just described, proper alignment of thevehicle1018 with respect to thecharging pad1150 can be conveniently and quickly achieved without requiring the user to leave thevehicle1018. Also, a charging session can be started without the need to plug in thevehicle1018.
• Although the induction-based vehicle charging system described above in connection withFIGS. 4, 18, and 19 is presented in the context of an on-board vehicle charging system (i.e., where thedisplay1032, and other indicators and selectors are located in one or more consoles of thevehicle1032, it should be noted that the vehicle alignment features described above can be used in connection with any of the other vehicle charging systems herein.
• Another feature of the present invention regards the location at which a cord-based vehicle charging system is attached to the vehicle. As described above, some vehicle charging systems according to the present invention utilize acord22,222,540,744,944 that is releasably or permanently attached to thevehicle18,218,418,618,818. It will be appreciated that such a tethered connection can present the danger of a user accidentally moving thevehicle18,218,418,618,818 before disconnecting thecord22,222,540,744,944 from thevehicle18,218,418,618,818. Depending upon the position and orientation of the electrical connector of thevehicle18,218,418,618,818 to which thecord22,222,540,744,944 is connected, and the manner in which the opposite end of thecord22,222,540,744,944 is attached to the electrical system of the house, building, or other facility, such movement can create significant damage to thevehicle18,218,418,618,818,cord22,222,540,744,944, and/or the electrical system of the house, building, or other facility. In some embodiments of the present invention, this damage can be mitigated or avoided by virtue of the position of the electrical connector of thevehicle18,218,418,618,818.
• With reference now toFIGS. 20-23, another embodiment of the present invention is illustrated, and is presented in the context of thevehicle charging cords22,122 in the embodiments ofFIGS. 2, 5-12, and 15 by way of example only. In this regard, the features described below in connection withFIGS. 20-23 can be utilized in conjunction with any of the vehicle charging systems disclosed herein in which apower cord22,222,540,744,944 is attached to avehicle18,218,418,618,818 for purposes of charging thebattery20,222,422,622,822 of thevehicle18,218,418,618,818.
• As shown inFIGS. 20-22, theplug26 of thevehicle charging cord22,222 releasably connects to theelectrical connector170 of thevehicle18,218. In the illustrated embodiment ofFIGS. 20-22, theelectrical connector170 of the vehicle is located in afront surface172 of thevehicle18,218. Accordingly, in the event a user moves thevehicle18,218 in a rearward direction without disconnecting thevehicle charging cord22,222, the opportunity for theplug26 of thevehicle charging cord22,222 to automatically disconnect by virtue of rearward movement of thevehicle18,218 is significantly increased. Of course, a significant factor in the amount of shear and tension force exerted upon theplug26,vehicle charging cord22,222, andelectrical connector170 prior to this disconnection is the location of the other end of thevehicle charging cord22,222. In those embodiments where the other end (e.g., plug24) of thevehicle charging cord22,222 is connected to the electrical system of a house, building, or other facility substantially in front of thevehicle18,218, this force can be significantly less than the disconnection force needed in those embodiments in which the other end of thevehicle charging cord22 is connected at a location laterally disposed from thevehicle18,218. However, for those applications in which thevehicle18,218 must be backed up to exit the vehicle charging area, this location of theelectrical connector170 can significantly reduce the amount of disconnection force compared to locations of theelectrical connector170 located on a side or rear of thevehicle18,210.
• Although not illustrated, in some embodiments, theelectrical connector170 of thevehicle18,218 is located in arear surface174 of thevehicle18,218. Accordingly, in the event a user moves thevehicle18,218 in a forward direction without disconnecting thevehicle charging cord22,222, the opportunity for theplug26 of thevehicle charging cord22,222 to automatically disconnect by virtue of forward movement of thevehicle18,218 is significantly increased. As described above, a significant factor in the amount of shear and tension force exerted upon theplug26,vehicle charging cord22,222, andelectrical connector170 prior to this disconnection is the location of the other end of thevehicle charging cord22,222. In those embodiments where the other end (e.g., plug24) of thevehicle charging cord22,222 is connected to the electrical system of a house, building, or other facility substantially behind thevehicle18,218, this force can be significantly less than the disconnection force needed in those embodiments in which the other end of thevehicle charging cord22 is connected at a location laterally disposed from thevehicle18,218. However, for those applications in which thevehicle18,218 must be moved forward to exit the vehicle charging area, this location of theelectrical connector170 can significantly reduce the amount of disconnection force compared to locations of theelectrical connector170 located on a side or front of thevehicle18,218.
• In some embodiments, a clearance or light interference fit is provided between theplug24 of thevehicle charging cord22,222 and the electrical connector170 (located in a front orrear surface172,174 of thevehicle18,218 as described above), thereby providing a reduced amount of force needed to disconnect theplug24 from theelectrical connector170. In some embodiments, a force needed for disconnection of theplug24 from theelectrical connector170 is no greater than about 20 pounds (measured in a direction parallel to motion of theplug24 with respect to theelectrical connector170 during connection) to avoid or reduce damage to thevehicle charging cord22,222,electrical connector170, andvehicle18,218. In other embodiments, this force is no greater than about 10 pounds to avoid or reduce damage to thevehicle charging cord22,222,electrical connector170, andvehicle18,218. In still other embodiments, this force is no greater than about 5 pounds to avoid or reduce damage to thevehicle charging cord22,222,electrical connector170, andvehicle18,218.
• As indicated above, the angle at which the force of disconnection is applied upon theelectrical connector170 and plug24 can have a significant impact upon the shear and tension forces experienced by theelectrical connector170 and plug24 when thevehicle18,218 is moved without unplugging thevehicle charging cord22,222. To reduce or mitigate these forces, the orientation of theelectrical connector170 with respect to thevehicle18,218 is selected to fall within a range of angles measured from a forward direction of thevehicle18,218. In particular, in some embodiments, theelectrical connector170 is oriented so that an angle176 (seeFIG. 21) between the forward direction of thevehicle18,218 (defined by proper alignment of the vehicle under normal operating conditions) and the direction of motion of theplug24 with respect to theelectrical connector170 during connection is no greater than about 50 degrees. In other embodiments, thisangle176 is no greater than about 40 degrees to reduce or mitigate the disconnection force. In still other embodiments, thisangle176 is no greater than about 30 degrees to reduce or mitigate the disconnection force. In combination with the maximum disconnection forces according to some embodiments as described above, these orientation angles176 of theelectrical connector170 can help to ensure damage-free disconnection of thevehicle charging cord22,222 from theelectrical connector170 of thevehicle18,218 regardless of whether theelectrical connector170 is located in the front orrear surface172,174 of thevehicle18,218 as described above.
• In some embodiments, thevehicle18,218 is provided with two or moreelectrical connectors170 in different locations (e.g., different sides) on the exterior of thevehicle18,218, any of which can be connected to avehicle charging cord22,222 to charge thebattery20,220 of thevehicle18,218. For example, oneelectrical connector170 can be located in afront surface172 of thevehicle18,218, and anotherelectrical connector170 can be located in arear surface172 of thevehicle18,218. Both suchelectrical connectors170 can be connected to thebattery20,220 andcontroller44,244 of thevehicle18,218 by suitable power wiring (e.g., wiring harnesses) extending along thevehicle18,218. In such embodiments, a user can choose to connect thevehicle charging cord22,222 to theelectrical connector170 closest to the location at which thevehicle charging cord22,222 is connected to the electrical system of the house, building, or other charging facility, or can connect thevehicle charging cord22,222 to theelectrical connector170 oriented at the smallest angle with respect to such a location upon accidental movement of thevehicle18,218. This ability to choose between two or moreelectrical charging connectors170 can present significant convenience to the user while helping to prevent damage to thevehicle charging cord22,222 andvehicle18,118 upon accidental movement of thevehicle18,118 while still plugged in.
• The illustrated embodiment ofFIGS. 20-23 is presented with reference to avehicle charging cord22,222 intended for releasable connection at anelectrical connector170 of thevehicle18,218. However, it should be noted that the same principles of disconnect force, disconnect angle, and cord-to-vehicle interface location apply regardless of whether thevehicle charging cord22,222 is intended to be disconnected at thevehicle18,218. In this regard, some embodiments of the present invention provide avehicle charging cord22,222 that is not intended for disconnection from thevehicle18,218 (as presented above in connection with earlier-described embodiments). However, in such embodiments, thevehicle charging cord22,222 and/or the electrical wiring of thevehicle18,218 can be provided with an electrical connector that can automatically disconnect upon experiencing a threshold force. Any electrical connector located in the wiring of thevehicle18,218 or in the cord extending therefrom to a source of electrical power can be used. For example, in embodiments in which a power cord extending from thevehicle18,218 can be retracted onto a reel located on thevehicle18,218 as described above, the power cord can have a releasable electrical connection at a point along the length of the cord. As another example, the power cord can be provided with a releasable electrical connector located at thehousing28,228 orcabinet742,1142 of the vehicle charging system. In any such case, the power cord can automatically disconnect upon experiencing a threshold force such as those described above, thereby preventing damage (or further damage) to thevehicle18,218 or the electrical system of the house, building, or other charging facility. Such disconnection can be frangible, meaning that the cord and/or connector is at least partially destroyed upon disconnection, or can be re-connectable by a user or service technician.
• In some embodiments, theelectrical connector170 is located in a surface of thevehicle18,218 that is recessed with respect to adjacent (e.g., surrounding) exterior body surfaces of thevehicle18,218. This feature can help to reduce exposure of theelectrical connector170 to the environment around thevehicle18,218. In these and other embodiments, theelectrical connector170 is located behind adoor178 that can either slide or pivot with respect to theelectrical connector170 in order to reveal theelectrical connector170 for connection and charging. Thedoor178 can also help to reduce exposure of theelectrical connector170 to the environment around thevehicle18,218. In some embodiments, thedoor178 can be opened manually by a user pushing, pulling, and/or rotating thedoor178. However, in other embodiments, thedoor178 can be at least partially opened remotely by a cable, solenoid and associated power wiring, mechanical linkage, and other elements connected to a user-manipulatable control in thevehicle18,218. Any mechanism used to open a fuel door for a gasoline or diesel-powered vehicle can be used for this purpose, and falls within the spirit and scope of the present invention.
• As described in greater detail above, thecontroller44,244 of thevehicle charging cords22,222 can communicate with acontroller108 of thevehicle18,218, such as by PLC-based communication. As an alternative or in addition to such communication, thevehicle charging cord22,222 (and all other vehicle charging cords described and/or illustrated herein) can enable such communication by dedicated wiring in thesame cord22,222. An example of such acord22,222 is illustrated inFIGS. 20-23, and with particular reference toFIG. 23. In this embodiment, theplug26 of thevehicle charging cord26 has twocommunication pins180 in addition to power andground blades182. The communication pins180 are electrically coupled to wires or other electrical lines extend along thecord22,222, and can extend into and establish electrical communication withsockets184 of theelectrical connector170. By this connection, communication along thecord22,222 on one or more electrical lines separate from power and ground lines of thecord22,222 can be established. It will be appreciated that such communication lines can be appropriately shielded for better performance, in some embodiments. Also, any number of such communication lines and associatedpins180 can be provided on thecord22,222. Furthermore, althoughpins180 are illustrated in the embodiment ofFIGS. 20-23, any other type of electrical connector (e.g., sockets adapted for connection to pins on the electrical connector170) can instead be used. Such communication lines can also be used on the opposite end of thecord22,222 for communication between thecontroller44,244 and acontroller50,250 of apower utility48,248, and can be used in any of the cord-based vehicle charging system embodiments disclosed herein.
• Operation of a vehicle charging system according to an embodiment of the present invention to perform a manual charging session will now be described with reference toFIG. 24. By way of example only, operation will be described in connection with the illustrated embodiment ofFIGS. 2, 5-11, and 15, it being understood that any portion or all of the operation described in connection withFIG. 24 can be applied in any of the other vehicle charging system embodiments described and/or illustrated herein. With continued reference toFIG. 24, power is first established11 to thevehicle charging cord22, such as (in some embodiments) by plugging thevehicle charging cord22 into an electrical outlet of the house, building or other facility at which charging is to take place, or by pressing thepower button34 in these and other embodiments. Upon receiving power, thecontroller44 can retrieve anycharge settings13 previously entered and saved intomemory106, and can display such settings when the appropriate screen(s)40 are shown upon thedisplay32. Next, thecontroller44 can receive charge time andother settings15 entered by a user via thedisplay32 and associatednavigation buttons36,38, and in some embodiments can store such settings in memory106 (at17).
• Following a command to start a manual battery charging session (at19) based upon a start time selected by a user (such as by theuser selecting selector86 in thesecond screen40A shown inFIG. 10 and entering a charge start time in selector90), thecontroller44 can continue to compare the time of theclock58 with the charge start time entered by the user (at21) until the start time is reached by theclock58. Until the start time is reached, the controller continues to delay23 charging of thebattery20 connected thereto. Once the start time is reached, thecontroller44 closes theelectrical switch92 at25, and begins charging thebattery20. Next, using the battery diagnostic circuitry described above, thecontroller44 determines the charge level of thebattery20 at27. If a determination is made that thebattery20 is not fully charged at29, thecontroller44 continues to keep theelectrical switch92 closed, thereby continuing to charge thebattery20 at31. Otherwise, thecontroller44 ends the charging session by opening theelectrical switch92 at33.
• Operation of a vehicle charging system according to another embodiment of the present invention to perform a programmed charging session will now be described with reference toFIG. 25. In this embodiment, additional features are provided compared to the charging session described above in connection withFIG. 24. By way of example only, operation will be described in connection with the illustrated embodiment ofFIGS. 2, 5-11, and15, it being understood that any portion or all of the operation described in connection withFIG. 25 can be applied in any of the other vehicle charging system embodiments described and/or illustrated herein. With continued reference toFIG. 25, power is first established11 to thevehicle charging cord22, such as (in some embodiments) by plugging thevehicle charging cord22 into an electrical outlet of the house, building or other facility at which charging is to take place, or by pressing thepower button34 in these and other embodiments. Upon receiving power, thecontroller44 can retrieve anycharge settings13 previously entered and saved intomemory106, and can display such settings when the appropriate screen(s)40 are shown upon thedisplay32.
• Next, at35, thecontroller44 can employ the battery diagnostic circuitry described above to detect one or more properties of thebattery20 connected to thevehicle charging cord22, such as the charge level of thebattery20, the voltage of thebattery20, the condition of the battery20 (e.g., whether thebattery20 is faulty), and the like, and can display (at37) any or all of this information to the user in any of the manners described above in connection with the embodiment ofFIGS. 2, 5-11, and 15. Thecontroller44 can also establish communication with thecontroller108 of thevehicle18 at39, and can retrieve information regarding the battery20 (e.g., battery make, model, age, and the like) at41 via thecontroller108 of thevehicle18 or directly from a memory of thevehicle18.
• Atstep43, thecontroller44 can receive charge time and other settings entered by a user via thedisplay32 and associatednavigation buttons36,38, and in some embodiments can store such settings in memory106 (at45). Thecontroller44 can also display the charge time remaining66 at47. Following a command to start a programmed battery charging session (at49) based upon a start time selected by a user (such as by theuser selecting selector86 in thesecond screen40A shown inFIG. 10 and entering a charge start time in selector90), thecontroller44 can continue to compare the time of theclock58 with the charge start time entered by the user (at51) until the start time is reached by theclock58. Until the start time is reached, the controller continues to delay53 charging of thebattery20 connected thereto. Once the start time is reached, thecontroller44 closes theelectrical switch92 at55 to begin charging thebattery20.
• Next, at57, thecontroller44 compares the time of theclock58 with an end time setting that can be entered into thevehicle charging cord22 according to some alternative embodiments of the present invention. If the end time has been reached, thecontroller44 ends the charging session by opening theelectrical switch92 at65. Otherwise, if the end time setting has not yet been reached, battery charging continues, and using the battery diagnostic circuitry described above, thecontroller44 determines the charge level of thebattery20 at59. If a determination is made that thebattery20 is not fully charged at61, thecontroller44 continues to keep theelectrical switch92 closed, thereby continuing to charge thebattery20 at63. Otherwise, thecontroller44 ends the charging session by opening theelectrical switch92 at65.
• Operation of a vehicle charging system according to another embodiment of the present invention to perform a programmed charging session will now be described with reference toFIG. 26. By way of example only, operation will be described in connection with the illustrated embodiment ofFIGS. 2, 5-11, and 15, it being understood that any portion or all of the operation described in connection withFIG. 26 can be applied in any of the other vehicle charging system embodiments described and/or illustrated herein. With continued reference toFIG. 26, power is first established11 to thevehicle charging cord22, such as (in some embodiments) by plugging thevehicle charging cord22 into an electrical outlet of the house, building or other facility at which charging is to take place, or by pressing thepower button34 in these and other embodiments. Upon receiving power, thecontroller44 can retrieve anycharge settings13 previously entered and saved intomemory106, and can display such settings when the appropriate screen(s)40 are shown upon thedisplay32.
• Next, at35, thecontroller44 can employ the battery diagnostic circuitry described above to detect one or more properties of thebattery20 connected to thevehicle charging cord22, such as the charge level of thebattery20, the voltage of thebattery20, the condition of the battery20 (e.g., whether thebattery20 is faulty), and the like, and can display (at37) any or all of this information to the user in any of the manners described above in connection with the embodiment ofFIGS. 2, 5-11, and 15. Thecontroller44 can also establish communication with thecontroller108 of thevehicle18 at39, and can retrieve information regarding the battery20 (e.g., battery make, model, age, and the like) at41 via thecontroller108 of thevehicle18 or directly from a memory of thevehicle18.
• Atstep43, thecontroller44 can receive charge time and other settings entered by a user via thedisplay32 and associatednavigation buttons36,38, and in some embodiments can store such settings in memory106 (at45). Following a command to start a programmed battery charging session (at49) based upon a battery charging end time selected by a user (such as by theuser selecting selector100 in thesecond screen40A shown inFIG. 10 and entering a charge end time in selector104), thecontroller44 can establish communication with thepower utility48 at67, and can transmit (or enable thepower utility48 to retrieve) the charge time settings, any other settings, and the battery property information to thepower utility48 at69.
• Next, thecontroller44 of thevehicle charging cord22 or thecontroller50 of thepower utility48 can calculate the power required to fully charge thebattery20 based at least in part upon the level of charge of thebattery20 at71. Thecontroller44 of thevehicle charging cord22 or thecontroller50 of thepower utility48 can then calculate the amount of time needed to fully charge thebattery20 based upon the power required to do so, and can thereby estimate the time of day at which charging can begin based at least in part upon the battery charging end time and the estimated duration of time necessary to fully charge the battery20 (at73).
• Atstep75, thecontroller44 can continue to compare the time of theclock58 with the charge start determined as described above until the start time is reached by theclock58. Until the start time is reached, the controller continues to delay77 charging of thebattery20 connected thereto. Once the start time is reached, thecontroller44 closes theelectrical switch92 at79 to begin charging thebattery20.
• Next, at81, thecontroller44 compares the time of theclock58 with an end time setting that can be entered into thevehicle charging cord22 according to some alternative embodiments of the present invention. If the end time has been reached, thecontroller44 ends the charging session by opening theelectrical switch92 at83. Otherwise, if the end time setting has not yet been reached, battery charging continues, and using the battery diagnostic circuitry described above, thecontroller44 determines the charge level of thebattery20 at85. If a determination is made that thebattery20 is not fully charged at87, thecontroller44 continues to keep theelectrical switch92 closed, thereby continuing to charge thebattery20 at89. Otherwise, thecontroller44 ends the charging session by opening theelectrical switch92 at83.
• Operation of a vehicle charging system according to another embodiment of the present invention to perform a programmed charging session will now be described with reference toFIG. 27. By way of example only, operation will be described in connection with the illustrated embodiment ofFIGS. 2, 5-11, and 15, it being understood that any portion or all of the operation described in connection withFIG. 27 can be applied in any of the other vehicle charging system embodiments described and/or illustrated herein. With continued reference toFIG. 27, power is first established11 to thevehicle charging cord22, such as (in some embodiments) by plugging thevehicle charging cord22 into an electrical outlet of the house, building or other facility at which charging is to take place, or by pressing thepower button34 in these and other embodiments. Upon receiving power, thecontroller44 can retrieve anycharge settings13 previously entered and saved intomemory106, and can display such settings when the appropriate screen(s)40 are shown upon thedisplay32.
• Next, at35, thecontroller44 can employ the battery diagnostic circuitry described above to detect one or more properties of thebattery20 connected to thevehicle charging cord22, such as the charge level of thebattery20, the voltage of thebattery20, the condition of the battery20 (e.g., whether thebattery20 is faulty), and the like, and can display (at37) any or all of this information to the user in any of the manners described above in connection with the embodiment ofFIGS. 2, 5-11, and 15. With this information, thecontroller44 can determine whether thebattery20 is defective or otherwise has a fault at91, and can communicate a battery fault message to the user in any of the manners also described above in connection with the embodiment ofFIGS. 2, 5-11, and 15 if a fault exists (at93). Thecontroller44 can also establish communication with thecontroller108 of thevehicle18 at95, and can retrieve information regarding the battery20 (e.g., battery make, model, age, and the like) at97 via thecontroller108 of thevehicle18 or directly from a memory of thevehicle18.
• Atstep99, thecontroller44 can receive charge time and other settings entered by a user via thedisplay32 and associatednavigation buttons36,38, and in some embodiments can store such settings in memory106 (at101). Following a command to start a programmed battery charging session (at103) based upon a battery charging end time selected by a user (such as by theuser selecting selector100 in thesecond screen40A shown inFIG. 10 and entering a charge end time in selector104), thecontroller44 can establish communication with thepower utility48 at105, and can transmit (or enable thepower utility48 to retrieve) the charge time settings, any other settings, and the battery property information to thepower utility48 at107.
• Next, thecontroller44 of thevehicle charging cord22 or thecontroller50 of thepower utility48 can calculate the power required to fully charge thebattery20 based at least in part upon the level of charge of thebattery20 at109. Thecontroller44 of thevehicle charging cord22 or thecontroller50 of thepower utility48 can then calculate the amount of time needed to fully charge thebattery20 based upon the power required to do so, and can thereby estimate the latest time of day at which charging can begin based at least in part upon the battery charging end time and the estimated duration of time necessary to fully charge the battery20 (at111). Also, at113, thecontroller44 of thevehicle charging cord22 or thecontroller50 of thepower utility48 can set an acceptable threshold cost of power (e.g., per unit time) at or below which battery charging will begin. In some embodiments, this threshold cost of power is entered by a user into thevehicle charging cord22 in any of the manners of user interface described herein, or can be set by thepower utility48 based upon the desired maximum power cost determined by thepower utility48.
• Atstep115, thecontroller44 can compare the time of theclock58 with the latest estimated charge time, and atstep117 can compare the current cost of power (e.g., per unit time) with the threshold cost of power determined atstep113. If the latest estimated charge start time has been reached or if the threshold cost of power has been reached, thecontroller44 closes theelectrical switch92 at119 to begin charging thebattery20. Otherwise, thecontroller44 continues to delay121 charging of thebattery20 connected thereto.
• Next, at123, thecontroller44 can check or otherwise determine whether communication has been lost with thecontroller50 of thepower utility48. If communication has been lost, thecontroller44 can send a communication fault message to the user in any of the manners described above in connection with the embodiment ofFIGS. 2, 5-11, and 15 (at125). Otherwise, thecontroller44 can check or otherwise determine whether the supply of power to thevehicle charging cord22 has been interrupted at127. If the supply of power has been interrupted, thecontroller44 can send a power interrupt fault message to the user in any of the manners also described above in connection with the embodiment ofFIGS. 2, 5-11, and 15 (at129).
• On a continuing basis as thebattery20 is being charged, thecontroller44 of thevehicle charging cord22 or thecontroller50 of thepower utility48 can monitor the cost of power supplied to thebattery20, and can compare this cost with the threshold cost of power described above (at131). If the cost of power supplied to thebattery20 exceeds the threshold cost of power, thecontroller44 of thevehicle charging cord22 or thecontroller50 of thepower utility48 can interrupt charging of the battery at133, such as by opening theelectrical switch92 of thevehicle charging cord92. Otherwise, using the battery diagnostic circuitry described above, thecontroller44 determines the charge level of thebattery20 at135. If a determination is made that thebattery20 is not fully charged at137, thecontroller44 continues to keep theelectrical switch92 closed, thereby continuing to charge thebattery20 at139. Otherwise, thecontroller44 ends the charging session by opening theelectrical switch92 at141.
• Four examples of vehicle charging operation according to embodiments of the present invention are described above in connection withFIGS. 24-27. It should be noted any sub-combination of the steps described in connection withFIGS. 24-27 can be performed in other embodiments. Also, although the steps of the various processes presented above are described as occurring in a particular order, a number of the steps of each process can occur in different orders without departing from the spirit and scope of the present invention. Furthermore, steps and combinations of steps described in combination with one or more of the embodiments ofFIGS. 24-27 can be employed in the processes of the other embodiments ofFIGS. 24-27. For example, the battery fault check and notification steps91,93, the communication fault and notification steps123,125, and/or the power interruption fault check and notification steps127,129 in the process illustrated inFIG. 27 can be utilized in any of the other embodiments disclosed herein, including those ofFIGS. 24-26.
• Also, in the various processes described and illustrated herein, thecontroller44 is described as performing a number of functions. Based upon the ability of those vehicle charging systems herein to communicate with a processor of a power utility, any of these functions can instead or also be performed by the processor of the power utility communicating and controlling thevehicle charging cords22 or systems.
• As described above, the use of any of the vehicle charging systems described and/or illustrated herein can provide significant control to a user in determining the conditions under which vehicle battery charging will occur. This control can result in cost savings to the user without impacting the user's daily routine. However, other benefits accrue to power utilities providing power to users of these vehicle charging systems. By at least partially controlling the time at which battery charging will occur and/or by having the ability to interrupt and re-start battery charging by a large number of users in a community, the power utility can better distribute power usage over a period of time, thereby providing significant cost savings to the power utility.
• An example of how a power utility can control multiple vehicle charging systems according to the present invention is illustrated inFIGS. 28 and 29. By way of example only, operation will be described in connection with users employingvehicle charging cords22,222 such as those illustrated inFIGS. 2, 5-11, and 15, it being understood that any portion or all of the operation described in connection withFIGS. 28 and 29 can be applied in any of the other vehicle charging system embodiments described and/or illustrated herein.
• With reference first toFIG. 28, thecontroller50 of the power utility48 (which can be defined by one or more servers and associated computer equipment) can communicate with thevehicle charging cords22,222 of multiple users, and can continuously or periodically update a queue or other list of on-line users who have requested a battery charge session as described above (at143).
• In some embodiments, thecontroller50 sorts the on-line users based upon one or more factors, such as the charge time end setting (i.e., earlier charge time end settings having priority), the estimated charge time needed for fully charging each battery20 (i.e., longer charge times having priority), the time at which the battery charge session was requested, and the like. By way of example only, thecontroller50 in the process ofFIG. 28 checks at145 whether any of thebatteries20 that are on-line have a very low charge, such as a charge below a minimum level set by the user atselector112 on thesecond screen40B shown inFIG. 10, or a charge below a minimum level set by thepower utility48. As another example, thecontroller50 in the process ofFIG. 28 checks at149 whether the estimated time to fully charge anybattery20 is equal to or greater than the time available for battery charging (i.e., to the battery charge completion time entered by the user atselector100 on thesecond screen40B shown inFIG. 10). If thecontroller50 determines that abattery20 has a very low charge or will require a charging duration equal to or greater than the charging time available, thecontroller50 can flag or otherwise indicate that thevehicle charging cord22,222 has priority over othervehicle charging cords22,222 (at147 and151, respectively).
• Thecontroller50 can also remove a priority designation from any on-linevehicle charging cord22,222 no longer meeting this criteria (at153), such as on-line charging cords22,222 that have been supplied with power based upon the fact that theirrespective batteries20 had a very low charge, but that now have supplied theirbatteries20 with a sufficient minimum threshold charge. Atstep155, the queue of on-linevehicle charging cords22,222 can be re-ordered based upon the determination of whichvehicle charging cords22,222 are flagged as having priority (described above), and upon any of the other factors also described above.
• Next, thecontroller50 at157 can determine whether the total power draw from the community or the total power draw of allvehicle charging cords22,222 exceeds a threshold maximum level of power draw. This maximum level of power draw can be set by apower utility48 based upon a threshold level of power cost to thepower utility48, the maximum output of power that can be supplied by thepower utility48 to the community, an amount of power budgeted by thepower utility48 for charging vehicle batteries via thevehicle charging cords22,222, other factors, and any combination thereof. If the total power draw does not exceed the maximum level of power draw set by thepower utility48, and if the queue ofvehicle charging cords22,222 awaiting charging is empty (at159), thecontroller50 can re-initiate the vehicle charging cord management process by again updating the vehicle charging cord queue at143. Otherwise, thecontroller50 of thepower utility48 can send signals at161 to one or morevehicle charging cords22,222 to begin charging theirrespective batteries20 by closing theirelectrical switches92. Such signals can be sent to anyvehicle charging cords22,222 flagged with priority, and then to any othervehicle charging cords22,222. In either case, such signals are sent tovehicle charging cords22,222 in the order presented in the vehicle charging queue (ordered as described above). Following this step, thecontroller50 can re-initiate the vehicle charging cord management process by again updating the vehicle charging cord queue at143.
• If the total power draw described above exceeds the maximum level of power draw set by thepower utility48 as determined by the processor atstep157, and if anyvehicle charging cords22,222 are not flagged as having priority (check by theprocessor50 made at step163) as described above, thecontroller50 can send signals to one or morevehicle charging cords22,222 not flagged as having priority to at least temporarily stop charging thebatteries20 connected thereto (e.g., by opening theelectrical switches92 of suchvehicle charging cords22,222) atstep165. In some embodiments, such signals can be sent by the power utility in batches, such as signals sent to two or more of suchvehicle charging cords22,222 at a given time or under a common command. Following this step, thecontroller50 can re-initiate the vehicle charging cord management process by again updating the vehicle charging cord queue at143. Otherwise, if theprocessor50 determines that allvehicle charging cords22,222 are flagged as having priority at163, thecontroller50 can re-initiate the vehicle charging cord management process by again updating the vehicle charging cord queue at143.
• In light of the fact that the vehicle charging cord management process illustrated inFIG. 28 can be performed on a continual basis, it will be appreciated that the steps described above in connection withFIG. 28 can be carried out in a number of different orders without departing from the spirit and scope of the present invention.
• With reference now toFIG. 29, an example application of the vehicle charging cord management process ofFIG. 28 is provided.FIG. 29 illustrates the total power draw (in kW) of a community upon apower utility48 over a 24-hour period of time. As shown inFIG. 29, the maximum preferred power draw of thepower utility48 described above in connection withFIG. 28 is 200 kW. As also shown inFIG. 29, the power draw of the community varies significantly over the 24-hour period, peaking around 3 pm and falling to a lowest level between 2 am and 3 am. Any number of factors can define this power draw over the 24-hour period, including without limitation the number of users using air conditioning or electrical heating units during the day and the times at which such units are operated by the users, the times at which any large manufacturing operations begin and end operations, and the like. For example, the second peak shown inFIG. 29 can be the result of one or more manufacturing plants in a community drawing significant power during a second shift.
• Based upon the amount of power drawn from thepower utility29 as shown inFIG. 29, thepower utility48 can control and operate a number of vehicle charging systems according to the present invention based upon non-peak time periods and upon other factors as described above (charge time end settings, estimated charge times needed to fully chargebatteries20, times at which battery charge sessions were requested, and the like). For example, a first group of users requesting charge sessions at 2 pm (point167 inFIG. 29) can have priority over other groups of users requesting charge sessions at 4 pm and 6 pm (points169 and171), respectively. Accordingly, once thecontroller50 of thepower utility48 determines that the power draw by the community has fallen below the preferred maximum level of power draw (e.g.,step157 inFIG. 28;point173 inFIG. 29), thecontroller50 can send signals to the vehicle charging systems of the first group of users to begin battery charging. Taking this additional power draw into account, thecontroller50 of thepower utility48 can later determine that the power draw by the community has fallen further (point175 inFIG. 29), and that the vehicle charging systems of the second user group can be turned on. However, if the total power draw by the community rises again, such as based upon a large draw from a manufacturing facility operating a second shift, thecontroller50 of thepower utility48 can temporarily turn off the vehicle charging systems of the second user group and then the first user group in series (points177 and179, respectively), and can turn on the vehicle charging systems of the first and second user groups in series once the total power draw by the community falls again (points181 and183, respectively).
• Although the third user group requested charging sessions much earlier as described above, the total power draw by the community remained too high to permit thecontroller50 of thepower utility48 to turn on the vehicle charging systems of the third user group until 11 pm. At this point (185 inFIG. 29), the total power draw taking into account the first and second groups of users falls sufficiently to permit thecontroller50 to turn on the vehicle charging systems of the third user group while still remaining below the preferred maximum power draw described above. The batteries corresponding to the first, second, and third groups of users illustrated inFIG. 29 become fully charged at different times, and cause battery charging to stop atpoints187,189, and191, respectively.
• Application of a vehicle charging system management process (using vehicle charging systems of the present invention) is shown by way of example inFIG. 29. It will be appreciated that a similar process can be implemented for any other power draw profile of a community, and that any number of charging initiations, interruptions, and re-initiations can occur for any number of users or groups of users throughout the course of a 24-hour period based at least in part upon the needs of the users and any preferred maximum level of power draw determined by the power utility.
• The embodiments described above and illustrated in the figures are presented by way of example only and are not intended as a limitation upon the concepts and principles of the present invention. As such, it will be appreciated by one having ordinary skill in the art that various changes in the elements and their configuration and arrangement are possible without departing from the spirit and scope of the present invention. For example, the vehicle charging systems described above and illustrated in connection with the embodiments ofFIGS. 2, 5-11 and 15;FIG. 3;FIGS. 4, 18, and 19;FIG. 12;FIGS. 13, 14, and 16;FIG. 17;FIGS. 20-23;FIG. 24,FIG. 25,FIG. 26,FIG. 27, andFIGS. 28 and 29 each have a number of features, elements, and/or steps. Although these features, elements, and steps are described and illustrated in connection with each embodiment, it should be noted that any sub-combination of such features, elements, and steps can be utilized in other embodiments of the present invention. The particular combination of features, elements, and steps in each illustrated embodiment is presented by way of example only, and does not indicate or imply that embodiments of the present invention must have all such features, elements, and steps.

Claims (20)

I claim:

1. A vehicle charger for charging a battery of a vehicle and adapted for communication with a first controller remote from the vehicle and vehicle charger, the vehicle charger comprising:

an electrical power cord releasably attachable to at least one of the vehicle and a source of power;

a second controller electrically coupled to the electrical power cord; and

at least one of a transmitter and a receiver coupled to the second controller and adapted for communication with the first controller,

the second controller responsive to at least one signal from the first controller by changing a charging state of the vehicle charger.

2. The vehicle charger ofclaim 1, wherein the electrical power cord is releasably attachable to the vehicle and the source of power.

3. The vehicle charger ofclaim 1, further comprising a housing in which the second controller is located, the housing coupled to and at least partially located between opposite ends of the electrical power cord.

4. The vehicle charger ofclaim 3, wherein the housing at least partially defines one of the opposite ends of the electrical power cord.

5. The vehicle charger ofclaim 1, wherein the second controller is adapted for communication with the first controller over the electrical power cord.

6. The vehicle charger ofclaim 1, wherein the second controller is adapted for wireless communication with the first controller via the at least one of the transmitter and receiver.

7. The vehicle charger ofclaim 1, wherein the second controller is adapted for automatic establishment of communication with the first controller upon connection of the vehicle charger with at least one of the battery and the source of power.

8. The vehicle charger ofclaim 1, wherein the second controller is adapted for communication with a computer receiving electric power information from the Internet.

9. The vehicle charger ofclaim 8, wherein the second controller is adapted for wireless communication with the computer via the at least one of the transmitter and receiver.

10. The vehicle charger ofclaim 1, wherein the vehicle charger has a first charging state in which the vehicle charger is not charging the battery, and a second charging state in which the vehicle charger is charging the battery.

11. The vehicle charger ofclaim 1, further comprising a display coupled to the second controller, the display displaying a level of charge of the battery.

12. The vehicle charger ofclaim 1, further comprising a display coupled to the second controller, the display displaying an amount of time for the battery to be fully charged based upon information regarding the battery received by the second controller.

13. The vehicle charger ofclaim 12, wherein the amount of time is an amount of time that is estimated by the second controller or received by the second controller.

14. The vehicle charger ofclaim 13, wherein the amount of time is updated on the display by the second controller during a charge session.

15. The vehicle charger ofclaim 1, further comprising a display coupled to the second controller, the display displaying an amount of power consumed by the battery during a vehicle charging session.

16. The vehicle charger ofclaim 15, wherein the amount of power consumed by the battery is an amount of power that is estimated by the second controller or is received by the second controller.

17. The vehicle charger ofclaim 16, wherein the amount of power consumed is updated on the display by the second controller during the charging session.

18. The vehicle charger ofclaim 1, further comprising a display displaying a cost of power to the battery per unit time.

19. The vehicle charger ofclaim 18, wherein the cost of power to the battery is received from the second controller by the first controller.

20. The vehicle charger ofclaim 1, further comprising a display displaying a total power cost of a charging session.

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