CN105667328A - Wireless charging method for electric automobile - Google Patents

Abstract

The invention discloses a wireless charging method for an electric automobile. The method includes the steps that a driver presses a parking charging button down, information of a coil on the charging side and the position of the automobile is transmitted to the automobile through a GPS module and a wireless signal transmitter, and the automobile automatically conducts parking and coil alignment through an automatic parking system according to position deviation information; after alignment is finished, a signal is sent to an electronic parking system to finish parking; and an automobile-mounted battery management system judges whether the current state is a chargeable state or not, and if the current state is the chargeable state, the automobile is charged. By the adoption of the method, the automatic parking system is additionally arranged on the automobile, the charging coil is accurately aligned through the GPS module and a wireless signal receiver, the charging effectiveness and efficiency are improved, and automatic parking and automatic charging functions are achieved; the weight and cost of the automobile are reduced, and no coil adjusting device is needed; and meanwhile the parking convenience is improved through the automatic parking system.

Description

A kind of electric automobile wireless charging method

Technical field

The present invention and charging electric vehicle field, particularly to a kind of electric automobile wireless charging method.

Background technology

The eco-friendly cars such as global warming is more and more higher to the requirement of motor vehicle emission, electric motor car develop into trend. Especially China's challenge owing to bringing for the high dependency of energy importation and serious atmospheric pollution so that the new forms of energy cars such as development electric motor car become urgent demand. It is one of universal key that abundant charging pile reduces user's mileage anxiety. And at present owing to common cable type charging pile takes up an area big, it is faced with the problems such as expropriation of land difficulty in city. The wireless charging that can directly be imbedded in underground becomes a solution. Induction due to simple in construction power big, be the main flow of current automobile wireless charging, on charger the aliging of coil of coil and the power side on car be key, can degree of registration directly influences fill electricity and charge efficiency with.

Current equipment side coil is mainly completed by driver with aliging of vehicle-mounted coil, and adjusts the position of coil by the machinery of equipment side or vehicle side, completes alignment. But there are problems in current method: 1, driver stops car accurately to the location comparison difficulty specified; 2, equipment side increases adjusting apparatus, increases volume and cost; 3, vehicle side increases adjusting apparatus, adds car weight and cost.

Summary of the invention

The present invention solves above-mentioned technical problem for provide a kind of with low cost, stop convenient, can the electric automobile wireless charging method of automatic charging.

For solving above-mentioned technical problem, the technical solution used in the present invention is:

A kind of electric automobile wireless charging method, comprises the following steps:

Step one, vehicle are obtained the positional information of Current vehicle by GPS module and are obtained the positional information of charge coil by wireless signal receiver, and two positional informationes are sent to vehicle-mounted automated parking system;

Step 2, vehicle-mounted automated parking system, according to two positional informationes received, obtain automatic parking information by stall testing apparatus and detection of obstacles radar, and automatic parking information are sent to entire car controller;

Vehicle, according to automatic parking information, by electric power-assisted steering apparatus and mair motor, is moved to the surface of charger coil by step 3, entire car controller;

Step 4, vehicle are by whether electricity reception coil sensor and charge coil sensor detection electricity reception coil and charge coil complete alignment;

If step 5 electricity reception coil and charge coil are not fully complete alignment, repeat step one to step 4, until electricity reception coil and charge coil complete alignment;

If after step 6 electricity reception coil and charge coil complete alignment, sending a signal to electronic parking system, completing parking, vehicle mounted battery management system judges that current state is whether as chargeable state, if current state is chargeable state, is then charged.

The medicine have the advantages that by adding an automated parking system onboard, utilize GPS module and wireless signal receiver, complete the precise alignment of charge coil, improve charging effectiveness and efficiency, it is achieved automatic stopping automatic charging function; Reduce car weight and cost, it is not necessary to coil adjusting apparatus; Automated parking system adds parking convenience simultaneously.

A kind of preferred structure as the present invention, the problem that position cannot be sent to wireless signal receiver in order to improve charge coil, in described step one, charge coil positional information is sent on the wireless signal receiver of vehicle by charge coil by wireless signal transmitter and GPS module. So, by wireless signal transmitter, charge coil positional information is sent on the wireless signal receiver of vehicle, it is possible to positioned the position of charge coil by GPS module, make location more accurate.

A kind of preferred structure as the present invention; rectification circuit and the problem of protection circuit is not had in order to improve electricity reception coil; described vehicle mounted battery management system includes rectification circuit and protection circuit, and described rectification circuit is connected with electricity reception coil, and described protection circuit is connected with electricity reception coil. So, the electric current obtained by coil by rectification circuit is carried out rectification and processes the electric current obtained needed for current-collecting device, and protection circuit is for protecting the safety of circuit components and battery.

As a kind of preferred structure of the present invention, the problem that cannot perform charging and discharging in order to improve vehicle mounted battery management system, described vehicle mounted battery management system includes Vehicular charger, and described Vehicular charger is connected with entire car controller. So, can being controlled the process of charging and discharging by Vehicular charger, after waiting parking to complete, vehicle mounted battery management system is judged to chargeable state, and Vehicular charger can perform charging process.

As a kind of preferred structure of the present invention, in order to the problem of alarm cannot be sent when improving vehicle abnormality charging, also include after described step 6:

Judge that current state is whether as normal charging condition, if current state is abnormal charged state, then sends abnormal alarm signal by vehicle entertainment system by vehicle mounted battery management system. So, during vehicle abnormality charging, abnormal alarm signal can be sent by vehicle entertainment system, remind driver to process in time.

As a kind of preferred structure of the present invention, in order to improve the problem that cannot automatically concede charge position after Vehicular charging completes, also include after described step 6:

Judge that current state is whether as charging complete state by vehicle mounted battery management system, if current state is charging complete state, then by vehicle-mounted automated parking system, vehicle is parked in appointment parking spot, and locks vehicle.So, by vehicle-mounted automated parking system, the vehicle after charging complete being parked in appointment parking spot, and lock vehicle, it is more convenient to use, safety.

Accompanying drawing explanation

Fig. 1 is the logical flow chart of electric automobile wireless charging method of the present invention.

Detailed description of the invention

By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.

Refer to Fig. 1, electric automobile wireless charging method of the present invention, comprise the following steps:

Step one, driver press charging press-key of parking, and vehicle is obtained the positional information of Current vehicle by GPS module and obtained the positional information of charge coil by wireless signal receiver, and two positional informationes are sent to vehicle-mounted automated parking system;

It is highly developed that electric automobile utilizes electromagnetic induction principle to carry out contactless charging technique, but owing to the stop position of car has direct relation with charge efficiency, be difficult to accurately rest in correspondence position, add vehicle-mounted automated parking system and just solve this problem. Increasingly become today of trend in automatic Pilot technology and auxiliary driving technology, automated parking system will be more and more general, and cost is more and more lower, possesses feasibility. While the method increasing parking convenience, also complete the precise alignment of charge coil, improve charge efficiency.

Step 2, vehicle-mounted automated parking system, according to two positional informationes received, obtain automatic parking information by photographic head, stall testing apparatus and detection of obstacles radar, and automatic parking information are sent to entire car controller;

Automated parking system, automobile can be made automatically to park with correct stop position, this system includes an environmental data acquisition system (photographic head, stall testing apparatus LDS, detection of obstacles radar, body electronics stabilising arrangement ESP and electric power-assisted steering apparatus EPS), central processing unit (entire car controller VCU) and vehicle policy controlling system (electric machine controller MCU, mair motor), described environmental data acquisition system includes image capturing system and vehicle-mounted distance measurement system, can acquisition of image data and the surrounding objects range data from vehicle body, and by data line transfer to central processing unit, described central processing unit after the Data Analysis Services that collects, can will draw the current location of automobile, target location and ambient parameter around, make automatic parking strategy according to above-mentioned parameter, and convert thereof into the signal of telecommunication, after described vehicle policy controlling system accepts the signal of telecommunication, make the manipulation in the traveling angle of automobile, direction and power support according to instruction.

Step 3, entire car controller, according to automatic parking information, drive mair motor, body electronics stabilising arrangement and electric power-assisted steering apparatus by electric machine controller, vehicle move to the surface of charger coil;

After vehicle mair motor obtains the signal of telecommunication, carry out vehicle and move.

Step 4, vehicle are by whether electricity reception coil sensor and charge coil sensor detection electricity reception coil and charge coil complete alignment;

Electricity reception coil sensor and charge coil sensor are separately positioned on electricity reception coil and charge coil, and are position sensor, detect electricity reception coil and charge coil relative position.

If step 5 electricity reception coil and charge coil are not fully complete alignment, repeat step one to step 4, until electricity reception coil and charge coil complete alignment;

If after step 6 electricity reception coil and charge coil complete alignment, sending a signal to electronic parking system, completing parking, vehicle mounted battery management system judges that current state is whether as chargeable state, if current state is chargeable state, is then charged.

Electronic parking system EPB, electronic parking system refers to the technology being realized stopping brake by electronic control mode, very general in existing vehicle. Vehicle mounted battery management system BMS is the important tie connecting vehicle mounted dynamic battery and electric automobile, and its major function includes: battery physical parameter is monitored in real time; Battery status is estimated; Inline diagnosis and early warning; Charge and discharge control with preliminary filling; Balanced management and heat management etc.

In the present embodiment, the charging press-key of parking in described step one may be provided in vehicle, it is possible to is arranged in car key. Being arranged in car, middle control place, steering wheel side, what driver can be very easy and convenient presses charging press-key of parking. Being arranged in car key, driver can press charging press-key of parking after leaving vehicle, uses convenient facility. In described step one, charge coil includes wireless signal transmitter and GPS module, is sent on the wireless signal receiver of vehicle by charge coil positional information by wireless signal transmitter. Vehicle mounted battery management system includes rectification circuit and protection circuit, and described rectification circuit is connected with electricity reception coil and charge coil, and described protection circuit is connected with electricity reception coil and charge coil. Rectification circuit, electric current electricity reception coil obtained carries out rectification and processes the electric current obtained needed for current-collecting device, protection circuit include current foldback circuit, connect counter protect circuit, thermal-shutdown circuit, temperature-compensation circuit and super-charge super-discharge protection circuit, current foldback circuit, limit the electric current in whole circuit, protect circuit safety; Connect and counter protect circuit, it is ensured that the safety of each components and parts in circuit when reverse power connection; Thermal-shutdown circuit, when in circuit, temperature is too high, circuit can be activated, it is prevented that causes that owing to temperature is too high heat radiation is bad, ultimately results in the damage of whole current-collecting device; Temperature-compensation circuit, for the compensation circuit that the impact of circuit is carried out by temperature; Super-charge super-discharge protection circuit, owing to overcharging or crossing to put, this circuit causes that the reduction of the lost of life, performance designs in order to prevent battery. Foregoing circuit is all very general circuit in the middle of prior art.

In the present embodiment, also include after described step 6:

Judge that current state is whether as normal charging condition, if current state is abnormal charged state, then sends abnormal alarm signal by vehicle entertainment system by vehicle mounted battery management system. So, during vehicle abnormality charging, abnormal alarm signal can be sent by vehicle entertainment system, remind driver to process in time. Vehicle entertainment system includes display, power amplifier, sound equipment and loudspeaker etc., it is possible to send abnormality alarm information by various modes, plays the effect reminding driver to process in time.

In the present embodiment, also include after described step 6:

Judge that current state is whether as charging complete state by vehicle mounted battery management system, if current state is charging complete state, then by vehicle-mounted automated parking system, vehicle is parked in appointment parking spot, and locks vehicle. So, by vehicle-mounted automated parking system, the vehicle after charging complete being parked in appointment parking spot, and lock vehicle, it is more convenient to use, safety. After charging complete, charge position will be conceded by vehicle-mounted automated parking system, and make charge efficiency maximize.

In use procedure, vehicle-mounted automated parking system and charging press-key of parking are arranged on electric automobile, set corresponding program, by pressing charging press-key of parking, obtaining charge coil positional information and vehicle position information, be sent to vehicle-mounted automated parking system, vehicle parking is put in place by vehicle-mounted automated parking system, and it being sent to vehicle mounted battery management system, vehicle mounted battery management system controls Vehicular charger and is charged.The present invention, by adding an automated parking system onboard, utilizes GPS module and wireless signal receiver, completes the precise alignment of charge coil, improves charging effectiveness and efficiency, it is achieved automatic stopping automatic charging function; Reduce car weight and cost, it is not necessary to coil adjusting apparatus; Automated parking system adds parking convenience simultaneously, and related system all has been provided with on existing electric automobile, as long as improving carrying out upgrading on electric automobile.

The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.

Claims (6)

1. an electric automobile wireless charging method, it is characterised in that comprise the following steps:

Step one, vehicle are obtained the positional information of Current vehicle by GPS module and are obtained the positional information of charge coil by wireless signal receiver, and two positional informationes are sent to vehicle-mounted automated parking system;

Step 2, vehicle-mounted automated parking system, according to two positional informationes received, obtain automatic parking information by stall testing apparatus and detection of obstacles radar, and automatic parking information are sent to entire car controller;

Vehicle, according to automatic parking information, by electric power-assisted steering apparatus and mair motor, is moved to the surface of charger coil by step 3, entire car controller;

Step 4, vehicle are by whether electricity reception coil sensor and charge coil sensor detection electricity reception coil and charge coil complete alignment;

If step 5 electricity reception coil and charge coil are not fully complete alignment, repeat step one to step 4, until electricity reception coil and charge coil complete alignment;

If after step 6 electricity reception coil and charge coil complete alignment, sending a signal to electronic parking system, completing parking, vehicle mounted battery management system judges that current state is whether as chargeable state, if current state is chargeable state, is then charged.

2. electric automobile wireless charging method according to claim 1, it is characterised in that: in described step one, charge coil positional information is sent on the wireless signal receiver of vehicle by charge coil by wireless signal transmitter and GPS module.

3. electric automobile wireless charging method according to claim 1, it is characterised in that: described vehicle mounted battery management system includes rectification circuit and protection circuit, and described rectification circuit is connected with electricity reception coil, and described protection circuit is connected with electricity reception coil.

4. electric automobile wireless charging method according to claim 1, it is characterised in that: described vehicle mounted battery management system includes Vehicular charger, and described Vehicular charger is connected with entire car controller.

5. electric automobile wireless charging method according to claim 1, it is characterised in that also include after described step 6:

Judge that current state is whether as normal charging condition, if current state is abnormal charged state, then sends abnormal alarm signal by vehicle entertainment system by vehicle mounted battery management system.

6. electric automobile wireless charging method according to claim 1, it is characterised in that also include after described step 6:

Judge that current state is whether as charging complete state by vehicle mounted battery management system, if current state is charging complete state, then by vehicle-mounted automated parking system, vehicle is parked in appointment parking spot, and locks vehicle.