Induction non-contact charger systems and alignment methods thereofTechnical field
The invention belongs to wireless charging and wireless positioning field, be specifically related to a kind of induction non-contact charging device and alignment methods thereof.
Background technology
Along with the development of electric automobile whole technology and key components and parts technology, motorcar electric changes into the development trend for Global Auto industry, and the main automobile that adopts electric energy to drive such as pure electric automobile becomes the Main Trends of The Development of China.
For the popularization of pure electric automobile, the supply of electric energy and to supplement be an important influencing factor, so the selection of battery charging modes is very important.Contactless charging does not need the jockeys such as attaching plug, socket, electric wire, and it transmits electric energy by alternating electromagnetic field or radio wave.Compare with the charging of traditional contact, contactless charging has need not manually plug power connection, save electric wire material, non-contact electric is dangerous, the feature such as strong adaptability under severe weather conditions, is convenient at parking lot and garage spread.Therefore, contactless charging is subject to the attention of increasing automobile vendor and energy supplier, the research and development of correlation technique and be applied in world's Main Developed Countries and all extensively carry out.
For a complete induction non-contact power charging system, its primary coil and secondary coil position alignment degree are higher, its charge efficiency is just higher, so position alignment degree also has very important impact to the efficiency of induction non-contact power charging system.But, wireless charging system is not considered the problem of position alignment aspect at present, the charging system of working it out under lab face efficiency is very high, but during to practical application, the simple driver's of dependence sensation is stopped and is difficult to make vehicle to stop in specified scope, thereby charge efficiency is had a greatly reduced quality, cause the huge waste of electric energy, affect again the charging interval.
Summary of the invention
The present invention is in order to address the above problem, for current wireless charging system, do not consider the problem of position alignment aspect, a kind of induction non-contact power charging system and the position aligning method based on charge efficiency judgement have been proposed, by adjusting position alignment, directly monitoring charge efficiency, makes system auto-alignment obtain optimum charge efficiency within the specific limits.
Induction non-contact charger systems, comprises ground electric energy transmission device and vehicle-mounted electric energy receiving system;
Vehicle-mounted electric energy emitter comprises display module, vehicle-mounted segment controller, in-vehicle wireless communication module, vehicle-mounted electric energy receiver module, battery and vehicle-mounted receiving coil; Vehicle-mounted electric energy receiving system is installed onboard, and vehicle-mounted receiving coil is installed under chassis;
Display module is human-computer interaction interface, position alignment information, battery electric quantity, charging is completed to information and feed back to driver;
Vehicle-mounted electric energy receiving circuit is monitored and controlled to vehicle-mounted segment controller, by calculating charge efficiency and feeding back to above ground portion controller received power; Vehicle-mounted segment controller is controlled logical sequence and the stability of vehicle-mounted electric energy receiving circuit, and wireless charging is carried out smoothly; Vehicle-mounted segment controller is controlled in-vehicle wireless communication module, carries out transfer of data; Vehicle-mounted segment controller outputs to display module by the information of required demonstration;
In-vehicle wireless communication module realizes the conversion of digital signal and wireless signal, jointly realizes the communication of vehicle-mounted segment controller and above ground portion controller and coordinates to control with ground communication module;
Vehicle-mounted electric energy receiving circuit is converted to high-frequency current rectifying and wave-filtering direct current and offers battery;
Battery is the energy storage module of electric motor car;
Vehicle-mounted receiving coil utilizes electromagnetic induction principle to produce induced current by alternating magnetic field, and is delivered to vehicle-mounted electric energy receiving circuit, realizes by ground electric energy transmitting circuit the delivery of electrical energy to vehicle-mounted electric energy receiving circuit;
Ground electric energy transmission device comprises ground transmitting coil, ground electric energy transmitting circuit, driver module, above ground portion controller and terrestrial wireless communication module; Ground electric energy transmission device is placed in ground, and ground transmitting coil is setting in topmost;
Ground transmitting coil adopts electromagnetic induction principle, and in the transmitting coil of ground, by the alternating current of high frequency, this coil produces the alternating magnetic field of high frequency around; When vehicle-mounted receiving coil is arranged in this alternating magnetic field, produces corresponding alternating current, thereby realize electric power transfer;
Ground electric energy transmitter module is by 220V/380V, and the family of 50HZ/industrial low frequency ac is converted into oudin's current, and produces high-frequency alternating magnetic field by ground transmitting coil;
Driver module is realized the displacement of ground transmitting coil and is controlled; The digital signal of above ground portion controller is converted into corresponding displacement, controls the position of ground coil;
Above ground portion controller carries out analyzing and processing by collection signal, realizes the control of recharge logic sequential and ground transmitting coil displacement; Communication acknowledgement current state by with vehicle module controller, starts or stops ground electric energy transmitting circuit; The signal that the efficiency of coming by vehicle module controller feedback increases or reduces, controls mobile module and carries out displacement, until arrive the highest position of charge efficiency; Controlling terrestrial wireless communication module and in-vehicle wireless communication module communicates;
Terrestrial wireless communication module matches with in-vehicle wireless communication module, realizes radio communication function.
Induction non-contact charge alignment methods, comprises following step:
The first step, checkout equipment and charge condition; After induction non-contact charger systems starts, vehicle-mounted segment controller and above ground portion controller detect respectively vehicle-mounted electric energy receiving circuit and ground electric energy transmitting circuit, and are confirmed whether to be applicable to charging; If be applicable to charging, enter step 2, if be not suitable for charging, do not start electric energy transmitting;
Second step, electric energy transmitting; When confirming to be applicable to charging, vehicle-mounted segment controller and above ground portion controller will be opened vehicle-mounted electric energy receiving circuit and ground electric energy transmitting circuit, carry out electric power transfer and monitor its state;
The 3rd step, judge whether optimum and mobile ground transmitting coil of current charge efficiency; Controller, by circuit state is monitored, obtains its current charge efficiency, and current charge efficiency is judged; When charge efficiency is during in optimum interval, the position alignment of two charge coils, does not move transmitting coil position in ground; When charge efficiency does not reach optimum interval, represent that the position of two coils is not aimed at, now above ground portion controller moves ground transmitting coil control driver module; The movement of ground transmitting coil will change the degree of registration of two coils, thereby changes the charge efficiency of system, forms FEEDBACK CONTROL; Vehicle-mounted segment controller and above ground portion controller carry out FEEDBACK CONTROL by coordination, thereby reach, aim at the optimization that realizes system charge efficiency configure by moving coil;
The 4th step, judge whether the charging of induction non-contact charger systems completes, and complete charge; When induction non-contact charger systems charging, the electric weight of vehicle-mounted segment controller monitoring battery, and judge whether it is full of; When battery is full of or when vehicle need to start, vehicle-mounted segment controller has charged judgement complete charge.
According to the present invention, use way of electromagnetic induction wireless charging system to comprise ground electric energy transmission device and vehicle-mounted electric energy receiving system.Between ground electric energy transmission device and vehicle-mounted electric energy emitter, pass through the mode electric energy transmitting of electromagnetic induction.Its concrete mode is, when ground electric energy transmission device is switched on, can produce by the transmitting coil of this device the magnetic field of alternation, and the electromagnetic induction principle of vehicle-mounted electric energy receiving system by receiving coil produces the electric current of alternation, this alternating current is converted into direct current by rectification circuit etc. and charges a battery.
According to the present invention, the alignment methods of this wireless charging system is mainly to carry out the configuration of charge efficiency optimization by feedback, and when charge efficiency reaches optimum, the object of its position alignment is also just reached.The method draws charge efficiency by detecting charging current voltage, can change the size of charging current voltage by mobile ground electric energy transmitting coil, affects charge efficiency.Therefore, the position of mobile ground electric energy transmitting coil and charge efficiency form feedback.By this feedback regulation, when two coils are completely on time, it is optimum that its charge efficiency also reaches, and system is adjusted object and reached.
The invention has the advantages that:
(1) on the basis of traditional contactless charging, added and take charge efficiency as controlling the location alignment device of target, realized the automatic majorization function of charge efficiency;
(2) be simple and easy to realize, only need monitor charge efficiency, can judge whether current state is applicable to charging;
(3) directly take charge efficiency as controlling target, the maximization of aiming at implementation efficiency by displacement, is closed-loop control system; Relatively take position as controlling the half-closed loop control system of target, reduced uncertainty, easily control more directly perceived and precision are also higher;
(4) system only need be upgraded on the basis of current wireless charging system, and it is convenient to realize;
(5) while having foreign matter or toy in coil, can have influence on charge efficiency and may cause damage to system, by the judgement to charge efficiency, temporarily stop charging, thereby realize measuring ability, protection system and toy safety simultaneously.
Accompanying drawing explanation
Fig. 1: wireless charging system integrated model schematic diagram of the present invention;
Fig. 2: wireless charging system module map;
Fig. 3: charging flow of the present invention.
In figure:
01-ground electric energy transmission device 02-vehicle-mounted electric energy receiving system
The vehicle-mounted segment controller 13-of 11-display module 12-in-vehicle wireless communication module
The vehicle-mounted receiving coil of 14-vehicle-mounted electric energy receiving circuit 15-battery 16-
Receiving coil 22-ground, 21-ground electric energy transmitting circuit 23-drive circuit
24-above ground portion controller 25-terrestrial wireless communication module
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Induction non-contact charger systems of the present invention, as shown in Figure 1 and Figure 2, comprises ground electric energy transmission device 01 and vehicle-mounted electricenergy receiving system 02.
Vehicle-mountedelectric energy emitter 02 comprisesdisplay module 11, vehicle-mountedsegment controller 12, in-vehiclewireless communication module 13, vehicle-mounted electricenergy receiver module 14,battery 15 and vehicle-mountedreceiving coil 16.
Vehicle-mounted electricenergy receiving system 02 is installed onboard, and wherein vehicle-mountedreceiving coil 16 is installed under chassis.
Display module 11 is human-computer interaction interface, by this part, position alignment information, battery electric quantity, charging is completed to information and feeds back to driver.
Vehicle-mountedsegment controller 12 draws the running status of system and moves by sequencing control modules by the information of each side being carried out to collection and treatment.Its main task has 1. monitorings and controls vehicle-mounted electricenergy receiving circuit 14, by calculating charge efficiency and feeding back to above ground portion controller 24 received power.2. the logical sequence of control vehicle-mounted electricenergy receiving circuit 14, stability etc., carry out wireless charging smoothly.3. control in-vehiclewireless communication module 13, carry out transfer of data.4. the information of required demonstration is outputed to displaymodule 11, realize the information feedback to driver.
In-vehiclewireless communication module 13 realizes the conversion of digital signal and wireless signal, jointly realizes the communication of vehicle-mountedsegment controller 12 and above ground portion controller 24 and coordinates to control withground communication module 25.
Vehicle-mounted electricenergy receiving circuit 14 is high-voltage great-current treatment circuit, and high-frequency current rectifying and wave-filtering is converted to direct current and offersbattery 15.
Battery 15 is energy storage modules of electric motor car, for car load provides power.
Vehicle-mounted receivingcoil 16 utilizes electromagnetic induction principle to produce induced current by alternating magnetic field, and is delivered to vehicle-mounted electricenergy receiving circuit 14, realizes by ground electricenergy transmitting circuit 22 delivery of electrical energy to vehicle-mounted electricenergy receiving circuit 14.
Ground electric energy transmission device 01 comprisesground transmitting coil 21, ground electricenergy transmitting circuit 22,driver module 23, above ground portion controller 24 and terrestrialwireless communication module 25.
Ground electric energy transmission device 01 is placed in ground, and its internal module is positioned at underground, and ground transmitting coil puts 21 in going up most, and this coil can move.
Ground transmitting coil 21 be all to use electromagnetic induction principle with vehicle-mountedreceiving coil 16, but effect is just contrary.In this coil, by the alternating current of high frequency, by electromagnetic induction principle, this coil produces the alternating magnetic field of high frequency around.When vehicle-mountedreceiving coil 16 is arranged in this alternating magnetic field, produces corresponding alternating current, thereby realize electric power transfer.
Ground electricenergy transmitter module 22 is similarly high-voltage great-current treatment circuit, mainly realize the functions such as voltage transitions, AC-DC, high-frequency inversion, by 220V/380V, the family of 50HZ/industrial low frequency ac is converted into oudin's current, and produces high-frequency alternating magnetic field byground transmitting coil 21.
Driver module 23 is realized the displacement ofground transmitting coil 21 and is controlled.The digital signal of above ground portion controller 24 is converted into corresponding displacement, controls the position of ground coil 21.Its building form is a lot, and representative instance is two-dimentional mobile platform, by the movement of two step motor control X-axis and Y-axis, thereby realizes location in plane.
Above ground portion controller 24 carries out analyzing and processing by collection signal equally, realizes the control of recharge logic sequential and 21 displacements of ground transmitting coil.Its concrete function is as follows: by the communication acknowledgement current state withvehicle module controller 12, start or stop ground electricenergy transmitting circuit 22 1.; 2. the signal that the efficiency of coming byvehicle module controller 12 feedbacks increases or reduces, controls mobile module and carries out displacement, until arrive the highest position of charge efficiency; 3. controlling terrestrialwireless communication module 25 communicates with in-vehiclewireless communication module 13.
Terrestrialwireless communication module 25 matches with in-vehiclewireless communication module 13, realizes radio communication function.
Between vehicle-mountedreceiving coil 16 andground transmitting coil 21, by electromagnetic induction, be coupled and carried out electric power conveying, its efficiency of transmission is relevant to size of gaps, coil alignment degree between the two.After system installation, size of gaps is between the two thereupon fixing, so the change of its efficiency of transmission depends primarily on coil alignment degree.
Induction non-contact charger systems of the present invention and alignment methods thereof, flow process as shown in Figure 3, by the cooperation of ground electric energy transmission device 01 and vehicle-mounted electricenergy receiving system 02, realize the optimization configuration of logical sequence arrangement, position alignment and the charge efficiency of whole charging.Key step is as follows:
The first step, checkout equipment and charge condition.After wireless charging system starts, vehicle-mountedsegment controller 12 and above ground portion controller 24 detect respectively vehicle-mounted electricenergy receiving circuit 14 and ground electricenergy transmitting circuit 22, and confirm to be applicable to charging.When having foreign matter, coil damage, fault, communication module or controller failure between battery Full Charge Capacity, two coils, vehicle-mountedsegment controller 12 and above ground portion controller 24 judgement current states are not suitable for charging, will not start electric energy transmitting.
Second step, electric energy transmitting.When confirming to be applicable to charging, vehicle-mountedsegment controller 12 and above ground portion controller 24 will be opened vehicle-mounted electricenergy receiving circuit 14 and ground electricenergy transmitting circuit 22, carry out electric power transfer and monitor its state.
The 3rd step, judge whether optimum and mobileground transmitting coil 21 of current charge efficiency.Controller, by circuit state is monitored, can obtain its current charge efficiency, and current charge efficiency is judged.When charge efficiency is during in optimum interval, the position of two charge coils is also just aimed at, and coil position needn't move.When charge efficiency does not reach optimum interval, represent that the position of two coils is not aimed at yet, now above ground portion controller 24 movesground transmitting coil 21 control driver module 23.The movement ofground transmitting coil 21 will change the degree of registration of two coils, thereby changes the charge efficiency of system, forms a FEEDBACK CONTROL.Vehicle-mountedsegment controller 12 and above ground portion controller 24 carry out FEEDBACK CONTROL by coordination, thereby can aim at the optimization that realizes system charge efficiency by moving coil, configure.
The 4th step, judge whether system charging completes, and complete charge.When system is charged, on one side vehicle-mountedsegment controller 12 can be monitored the electric weight ofbattery 15, and judge whether it is full of.When battery is full of or when vehicle need to start, vehicle-mountedsegment controller 12 has charged judgement complete charge.