CN108382242B

CN108382242B - Wireless quick charging method for electric automobile

Info

Publication number: CN108382242B
Application number: CN201810211891.3A
Authority: CN
Inventors: 陈美林
Original assignee: Meiao Shijie Xiamen Intelligent Technology Co ltd
Current assignee: Meiao Shijie Xiamen Intelligent Technology Co ltd
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2020-09-08
Anticipated expiration: 2038-03-15
Also published as: CN108382242A

Abstract

The invention discloses a wireless quick charging method for an electric automobile, which comprises the following steps: a first wireless transmitting module of the wireless charging frame is in communication connection with a wireless receiving module arranged on the side face of the electric automobile body within a certain distance, and the first wireless transmitting module starts charging and transmits energy outwards; the wireless receiving module of the electric automobile receives the energy transmitted by the first wireless transmitting module, converts the energy and stores the energy into the charging battery; meanwhile, under the driving of the controller to the motor, the second wireless transmitting module on the telescopic rotating support is aligned with the wireless receiving module, when the fact that the distance between the second wireless transmitting module and the wireless receiving module meets a preset value is detected, the alignment is stopped, the second wireless transmitting module starts charging, and energy is transmitted outwards. According to the invention, two wireless transmitting modules are arranged, one wireless transmitting module is fixed on the wireless charging frame, and the other wireless transmitting module is close to the wireless receiving module arranged on the side surface of the automobile through the telescopic rotating frame, so that the charging efficiency can be greatly improved.

Description

Wireless quick charging method for electric automobile

Technical Field

The invention relates to a quick charging technology of an electric automobile.

Background

The development of electric automobiles is a globally recognized effective strategy for relieving energy shortage and environmental pollution, and is of great importance to China. Taking the petroleum consumption of China as an example, the net import of petroleum is about 2.04 hundred million tons in 2009, and the import dependence reaches 52 percent and far exceeds the international warning line standard of 35 percent. Wherein the fuel consumption of the vehicle accounts for 1/3 strong of the total petroleum consumption. Therefore, the development and popularization of the electric automobile can reduce the fuel consumption, and the electric automobile has important strategic significance for relieving the environmental pollution of China, ensuring the energy safety and supply and the national sustainable development. The most important factor restricting the development of the electric vehicle at present is the problem of wireless charging, and the existing electric vehicle is not developed enough due to the charging efficiency and the storage capacity of the rechargeable battery.

In the conventional electric vehicle, a general charging method is to build infrastructure such as an electric vehicle charging station and a charging network. In current electric automobile charging station, when the electric automobile that adopts wireless charging mode charges, need arrange in the wireless receiving board of vehicle bottom portion and arrange in the wireless transmitting plate alignment on ground, could guarantee charging efficiency's maximize. For example, an invention patent with application number 201080058025.7 discloses a wireless charging system and a charging method for an electric vehicle, wherein the charging system comprises: a power control device provided in the wireless charging station and controlling all the wireless power transmission devices; the wireless power transmission device and the ground short-distance wireless communication module are arranged in the parking area; a plurality of wireless power transmission devices which are arranged on the ground of the parking area in quantity and select and operate a part of wireless transmission panels facing along with the charging information of the electric automobile; and a plurality of wireless transmission panels capable of lifting are installed at the bottom of the electric automobile, a wireless power receiver, a wireless charging terminal, a short-distance wireless communication module and a charging controller are arranged in the electric automobile, and optimization of wireless charging is realized through selection of a driver of the wireless charging terminal. According to the wireless charging system, a plurality of receiving coils are arranged at the bottom of the vehicle, and when the vehicle is parked on a charging parking space, a driver selects a receiving plate with the optimal effect to realize optimal wireless charging. That is, when charging an electric vehicle, it is necessary to fix the electric vehicle in a specific position to achieve the optimal effect. The patent determines the optimal positioning of the receiver of the transmitter by requiring a driver to manually select a proper receiving plate to work and arranging a plurality of receiving plates at the bottom of the vehicle to be expensive.

Furthermore, an invention patent with application number 201611032986.6 discloses a method, a device and a system for charging an electric automobile, wherein after a plug of a charging pile is connected to a socket of the electric automobile, the electric automobile detects a charging mode; when A is detected⁺When the line has a high level, the electric automobile determines to adopt a direct current charging mode; the electric vehicle is connected with the power supply through the A⁺Receiving the charging of the charging pile by a line; or when detecting that the CP wire has a high level, the electric automobile determines to adopt an alternating current charging mode; and the electric automobile receives charging of the charging pile through the CP line. When the electric automobile needs to be charged in an emergency, the charging pile can charge the electric automobile in a direct current charging mode; when electric automobile does not need promptly to charge, fill electric pile and can adopt the alternating current charging mode to charge for electric automobile. The two charging modes can be provided, the required charging mode can be selected according to actual needs, the charging mode is flexible, and the temporary requirement for emergency charging of the electric automobile can be met.

The above patents all use a fixed charging setting for charging. While the most fundamental purpose of wireless charging is freedom, it is known from the above patents and the prior art that the current charging method basically cannot realize free charging.

Therefore, an invention patent with the application number of 201320840488.X discloses a charging system for an electric automobile during driving, which comprises a charging access end arranged in the electric automobile and a charging emission source laid in a lane or erected at the edge of the lane, wherein the charging access end is connected with a power battery in the electric automobile, and a wireless charging mode adopting an electromagnetic induction principle is adopted between the charging access end and the charging emission source. Although the charging system designed by the invention can be used for charging the electric automobile during running, the running of the automobile is not influenced while charging, and the problems of short endurance mileage, long charging time, waiting requirement and the like of the electric automobile are solved. However, when the vehicle is used specifically, a special lane needs to be arranged for the electric vehicle, and a wireless power transmitting device is laid at the bottom of the whole line of the lane to charge the running electric vehicle. This approach, while theoretically possible, has the following drawbacks in actual operation: 1. the wireless electric energy transmitting device is laid on the whole line, and the realization difficulty in technology and actual construction is realized; 2. the cost is too high, the implementation can be carried out in a small range, and the popularization is difficult; 3. wireless electric energy transmitting device is laid to whole circuit, and electric automobile goes the in-process on this lane, and wireless electric energy transmitting device must be in the transmitted energy state always, not only leads to the energy to lose greatly, if people or animal or other vehicles mistake break into wherein moreover, can cause certain potential safety hazard.

Disclosure of Invention

The following presents a simplified summary of embodiments of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that the following summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.

According to one aspect of the application, a wireless quick charging method for an electric automobile is provided, a movable wireless charging frame for charging the side face of the electric automobile is creatively provided, and a free, feasible and safe charging mode can be provided for the electric automobile.

Specifically, the wireless quick charging method for the electric automobile is applied to a wireless quick charging system for the electric automobile, the wireless quick charging system for the electric automobile comprises a wireless charging frame and the electric automobile, wherein the wireless charging frame is provided with a wireless transmitting module, a communication module and a controller, the electric automobile is provided with a wireless receiving module on the side face of an automobile body, and the wireless transmitting module and the communication module are electrically connected with the controller; the wireless transmitting module and the wireless receiving module are connected within a certain distance, and start to charge a rechargeable battery of the electric automobile; the wireless charging rack is also provided with a telescopic rotating bracket and a motor for driving the telescopic rotating bracket to perform telescopic and rotating operations, and the motor is controlled by the controller; the wireless transmitting module comprises a first wireless transmitting module arranged on the wireless charging frame and a second wireless transmitting module arranged on the telescopic rotating bracket; one end of the telescopic rotating bracket is fixed in an accommodating groove (used for accommodating the whole telescopic rotating bracket) on the wireless charging frame body, and the other end of the telescopic rotating bracket is provided with a second wireless transmitting module; the charging method comprises the following processes:

step 1: the electric automobile is provided with a communication device corresponding to the communication module of the wireless charging frame, when the communication module of the wireless charging frame receives a preset communication signal of the communication device of the electric automobile, the electric automobile is determined to enter a charging range of the wireless charging frame, and the wireless transmitting module is awakened from a dormant state;

step 2: a first wireless transmitting module of the wireless charging frame is in communication connection with a wireless receiving module arranged on the side face of the electric automobile body within a certain distance, and the first wireless transmitting module starts charging and transmits energy outwards; the wireless receiving module of the electric automobile receives the energy transmitted by the first wireless transmitting module, converts the energy and stores the energy into the charging battery;

meanwhile, under the drive of the controller to the motor, a second wireless transmitting module on the telescopic rotating bracket is aligned with the wireless receiving module, when the fact that the distance between the second wireless transmitting module and the wireless receiving module meets a preset value is detected, alignment is stopped, the second wireless transmitting module starts charging, and energy is transmitted outwards; the electric automobile receives the energy transmitted by the second wireless transmission module, converts the energy and stores the energy into the charging battery;

and step 3: after the electric automobile drives away from the radiation range of the wireless charging frame, the first wireless transmitting module and the second wireless transmitting module enter the dormant state again and are not charged any more; and the retractable rotating bracket retracts into the accommodating groove of the wireless charging rack.

By adopting the process, the movable wireless charging frame is arranged, so that the side surface of the automobile is charged, underground operation is not required to be laid, and the construction cost and the construction difficulty are greatly reduced; the movable wireless charging frame is more convenient for free charging of the electric automobile; simultaneously, set up two wireless transmitting module, one is fixed on wireless charging frame, and one is close the wireless receiving module who locates the car side through scalable swivel mount, can improve charge efficiency greatly. In a special case, the first wireless transmission module or the second wireless transmission module can be operated independently by changing the program. In addition, generally, the system is in a dormant state, when the communication device detects that the electric vehicle enters a radiation range of a certain wireless charging frame, the system enters a working state, the first wireless transmitting module charges the electric vehicle when being prepared, and the second wireless transmitting module is added into a charging line when the telescopic rotating frame extends to a preset distance; and after the wireless charging rack is driven out of the radiation range of the wireless charging rack, the charging is closed. It has not only practiced thrift the cost greatly through above-mentioned scheme, has still avoided energy loss, and system under the dormancy state moreover does not have any safety problem to other vehicles or people and animal around wireless charging frame yet to the problem explained in the background art has been solved.

Drawings

Fig. 1 is a schematic diagram of a wireless fast charging system for an electric vehicle according to the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Specifically, the wireless quick charging method for the electric automobile is applied to a wireless quick charging system for the electric automobile. Referring to fig. 1, the wireless quick charging system for the electric vehicle comprises a wireless charging stand 100 having a first wireless transmitting module 101, a second wireless transmitting module 102, a communication module 103 and a controller 104, and an electric vehicle 200 having a wireless receiving module 201 arranged on a side surface of a vehicle body, wherein both the wireless transmitting module and the communication module 103 are electrically connected with the controller 104; the first wireless transmission module 101, the second wireless transmission module 102 and the wireless receiving module 201 establish connection within a certain distance, and start to charge the rechargeable battery 202 of the electric vehicle 200; wherein, the wireless charging rack 100 is further provided with a retractable rotating bracket 105 and a motor for driving the retractable rotating bracket 105 to perform retractable and rotating operations, and the motor is controlled by the controller 104; the wireless transmitting module comprises a first wireless transmitting module 101 arranged on the wireless charging rack 100 and a second wireless transmitting module 102 arranged on the telescopic rotating bracket 105; one end of the retractable rotating bracket 105 is fixed in an accommodating groove (an accommodating groove for accommodating the entire retractable rotating bracket 105) on the body of the wireless charging stand 100, and the other end is provided with a second wireless transmitting module 102;

in this embodiment, two wireless transmission modules are adopted, and in practice, more wireless transmission modules may be adopted. In this embodiment, in order to cooperate with the wireless charging module of the electric vehicle, the first wireless transmitting module 101 and the second wireless transmitting module 102 are arranged at the same height from the ground, and the positions thereof are in tandem (for the electric vehicle, both front and rear are relative): the wireless charging rack is provided with an accommodating groove for the telescopic rotating bracket 105, the first wireless transmitting module 101 is arranged at the free end of the telescopic rotating bracket 105 in the accommodating groove, and the second wireless transmitting module 102 approaches the wireless charging module of the electric automobile along with the rotation/extension of the telescopic rotating bracket 105, so that the positions of the two modules are closer, and the charging efficiency is greatly improved.

The charging method comprises the following processes:

step 1: the electric automobile 200 is provided with a communication device 203 corresponding to the communication module 103 of the wireless charging rack 100, when the communication module 103 of the wireless charging rack 100 receives a preset communication signal of the communication device 203 of the electric automobile 200, the electric automobile 200 is determined to enter the charging range of the wireless charging rack 100, and the wireless transmitting module is awakened from a dormant state;

step 2: the first wireless transmitting module 101 of the wireless charging rack 100 is in communication connection with a wireless receiving module 201 arranged on the side face of the body of the electric automobile 200 within a certain distance, and the first wireless transmitting module 101 starts charging and transmits energy outwards; the electric automobile 200 receives the energy transmitted by the first wireless transmission module 101, converts the energy and stores the energy into the rechargeable battery 202;

meanwhile, under the driving of the motor by the controller 104, the second wireless transmitting module 102 on the telescopic rotating bracket 105 and the wireless receiving module 201 are aligned, when the distance between the second wireless transmitting module 102 and the wireless receiving module 201 is detected to meet a preset value, the alignment is stopped, the second wireless transmitting module 102 is started to charge, and energy is transmitted outwards; the electric vehicle 200 receives the energy transmitted by the second wireless transmission module 102, converts the energy and stores the converted energy into the rechargeable battery 202; the controller can rotate and stretch the telescopic rotating frame through the assistance of the sensor or the assistance of the camera, and the details are not described here.

This embodiment sets up two wireless transmitting module, and one is fixed on wireless charging frame, and one is close the wireless receiving module 201 of locating the car side through scalable swivel mount, can improve charge efficiency greatly. In a special case, the first wireless transmission module 101 or the second wireless transmission module 102 can be operated independently by changing the program; for example, in some special cases, if further reduction of magnetic radiation is required, only the second wireless transmission module 102 is used to operate alone.

And step 3: after the electric vehicle 200 leaves the radiation range of the wireless charging rack 100, the first wireless transmission module 101 and the second wireless transmission module 102 enter the sleep state again, and are not charged any more; and the retractable pivoting bracket 105 retracts into the receiving slot of the wireless charging stand 100. Meanwhile, the controller 104 sends the charging parameters of the rechargeable battery 202 of the electric vehicle 200 to the cloud database for storage, wherein the charging parameters at least include a charging number n, a charging current a [ n ] (the charging current for the first charging is a (1), and so on, the charging number for the nth time is a (n), a [ n ] (a (1), a (2) … … a (n)), a charging time length b [ n ] (b (1), b (2) … … b (n)), a pre-charging electric quantity c [ n ] (c (1), c (2) … … c (n)), a post-charging electric quantity d [ n ] (d (1), d (2) … … d (n)), and a discharging current e [ n ] (e (1)) of the first wireless transmitting module 101 of the wireless charging rack 100, e (2) … … e (n)), a discharge time f [ n ] (f (1), f (2) … … f (n)), a charging current g [ n ] (g (1), g (2) … … g (n))), a charging time h [ n ] (h (1), h (2) … … h (n)) of the second wireless transmission module 102, and charging environments such as temperature and humidity.

After charging for many times, obtaining a group of charging parameter data, and calculating the energy storage efficiency x of the rechargeable battery: the energy storage efficiency x is k × (charging current × charging time length) ÷ (first wireless transmission module discharging current × first wireless transmission module discharging time + second wireless transmission module discharging current × second wireless transmission module discharging time) × 100%.

Where k is a correction coefficient, which can be calculated from empirical data, for example, when the number of charges is sufficiently large (greater than or equal to a preset value), k ═ Σ ((post-charge amount d [ n ] -pre-charge amount c [ n ])/(charge current a [ n ] × charge time period b [ n ]))/n, where Σ ((post-charge amount d [ n ] -pre-charge amount c [ n ])/(charge current a [ n ] × charge time period b [ n)))/(post-charge amount d (1) × charge time period b (1))/(charge current a (1) × charge time period b (1)) + (post-charge amount d (2) × pre-charge amount c (2))/+ … … + (post-charge amount d (n))/(pre-charge amount c (n)), (charge current a (n))), (charge (b (n)), k can also be obtained from experimental data when the number of charges is less than a preset value, for example when the number of charges is less (less than a preset value), k takes a value in the interval [0.83-0.95 ].

In addition, the rechargeable battery of the electric automobile is provided with a unique identifier, and the unique identifier can be realized by hardware or software. In step 1, after the communication module 103 of the wireless charging rack 100 receives a preset communication signal of the communication device 203 of the electric vehicle 200, or after a communication connection is established through another scheme in which the communication module 103 of the wireless charging rack 100 is matched with the communication device 203 of the electric vehicle 200, the communication module 103 sends the received preset communication signal to the controller 104, the preset communication signal at least includes a unique identifier of the rechargeable battery 202, and after the controller 104 receives the preset communication signal, the unique identifier of the rechargeable battery 202 is analyzed, a cloud database is searched, and a charging mode is selected according to the energy storage efficiency.

In this embodiment, the charging mode includes ac charging of the electric vehicle and dc charging of the electric vehicle. In order to construct the wireless charging rack 100 in a mobile manner to facilitate free charging of the electric vehicle, the power module 106 of the wireless charging rack 100 may be powered by a power line from the transformer side, led to the wireless charging rack 100 via a low-voltage cable, and then used to perform ac charging (generally slow ac charging) or dc charging (generally fast dc charging) on the electric vehicle 200. In the experiment, the following intelligent charging adjustment is carried out for protecting the rechargeable battery to prolong the service life of the rechargeable battery by considering environmental factors such as charging temperature and humidity and loss conditions such as a battery charging electrochemical reaction and a thermal management system: when the energy storage efficiency x is less than or equal to 10%, a direct current quick charging mode is adopted, when x is less than or equal to 10%, an alternating current slow charging mode is adopted, and when x is greater than 30%, a direct current quick charging mode is adopted.

In addition, in the above process, the first wireless transmitting module, the second wireless transmitting module and the wireless receiving module can realize wireless charging through electric waves, induction or resonance. For example, when the coil induction is adopted to realize wireless charging, the first wireless transmission module and the first wireless transmission module include: the device comprises a control unit, a first communication unit, a power supply unit and a transmitting coil; the wireless receiving module comprises a second communication unit, a receiving coil, an energy conversion unit and a rechargeable battery; when energy is transmitted, the power supply module receives alternating current of commercial power, converts the alternating current into required energy through high-frequency inversion, and transmits the energy through the transmitting coil; the receiving coil of the electric automobile receives the energy transmitted by the transmitting coil, and the energy is converted by the energy conversion unit and then stored in the charging battery.

Typically, the system is in a sleep state. When the system is used, the communication device and the communication module interact to know that the electric automobile enters the radiation range of the wireless charging frame, and then the system enters a working state from a dormant state; when the electric automobile is driven to a proper distance away from the wireless charging frame, the first wireless transmitting module is charged when being prepared; at this moment, the second wireless transmitting module makes the telescopic rotating frame extend to a preset distance away from the wireless receiving module under the control of the controller and then joins in a charging line and column, and the second wireless transmitting module and the wireless receiving module transmit energy in a short distance, so that the conversion efficiency can be greatly improved. When the electric automobile drives away from the radiation range of the wireless charging frame, the charging is closed. It has not only practiced thrift the cost greatly through above-mentioned scheme, has still avoided energy loss, and system under the dormancy state moreover does not have any safety problem to other vehicles or people and animal around wireless charging frame yet to the problem explained in the background art has been solved.

In conclusion, the method has the advantages of high feasibility, simplicity in implementation, easiness in large-scale popularization and high practicability.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A wireless quick charging method for an electric automobile is characterized by comprising the following steps: the wireless quick charging system is applied to an electric automobile and comprises a wireless charging frame with a wireless transmitting module, a communication module and a controller, and the electric automobile with a wireless receiving module arranged on the side surface of an automobile body, wherein the wireless transmitting module and the communication module are electrically connected with the controller; the wireless transmitting module and the wireless receiving module are connected within a certain distance, and start to charge a rechargeable battery of the electric automobile; the wireless charging rack is also provided with a telescopic rotating bracket and a motor for driving the telescopic rotating bracket to perform telescopic and rotating operations, and the motor is controlled by the controller; the wireless transmitting module comprises a first wireless transmitting module arranged on the wireless charging frame and a second wireless transmitting module arranged on the telescopic rotating bracket; one end of the telescopic rotating bracket is fixed in an accommodating groove on the wireless charging frame body, and the other end of the telescopic rotating bracket is provided with a second wireless transmitting module; the charging method comprises the following steps:

and step 3: after the electric automobile drives away from the radiation range of the wireless charging frame, the first wireless transmitting module and the second wireless transmitting module enter the dormant state again and are not charged any more; the telescopic rotating bracket retracts into the accommodating groove of the wireless charging frame;

in the step 1, a communication module of the wireless charging rack receives a preset communication signal of a communication device of the electric vehicle, the communication module sends the received preset communication signal to a controller, the preset communication signal at least comprises a unique identifier of the rechargeable battery, and after the controller receives the preset communication signal, the controller analyzes the unique identifier of the rechargeable battery, searches a cloud database and selects a charging mode according to the energy storage efficiency;

in the step 3, after the electric vehicle drives away from the radiation range of the wireless charging frame, the controller sends the charging parameters of the rechargeable battery of the electric vehicle to the cloud database for storage;

wherein the charging parameters include at least a charging number n, a charging current a [ n ] ═ a (1), a (2) … … a (n)), a charging time period b [ n ] ═ b (1), b (2) … … b (n)), a pre-charging electric quantity c [ n ] ═ c (1), c (2) … … c (n)), a post-charging electric quantity d [ n ] ═ d (1), d (2) … … d (n)), and a first wireless transmission module discharging current e [ n ] ═ e (1), e (2) … … e (n)), a first wireless transmission module discharging time f [ n ] ═ f (1), f (2) … … f (n)), a second wireless transmission module charging current g [ n ] ═ g (1), g (2) … … g (n), a second wireless transmission module charging time period h [ n ] ═ h (1), h (2) … … h (n);

the energy storage efficiency x of the rechargeable battery is calculated as follows:

the energy storage efficiency x is k x (charging current x charging time length) ÷ (first wireless transmission module discharging current x first wireless transmission module discharging time + second wireless transmission module discharging current x second wireless transmission module discharging time) × 100%;

where k is a correction coefficient.

2. The wireless quick charging method for the electric automobile according to claim 1, characterized in that: and a unique identifier is arranged on the rechargeable battery of the electric automobile.

3. The wireless quick charging method for the electric automobile according to claim 1, characterized in that:

when the number of times of charging is greater than or equal to a preset value, k ═ Σ ((amount of electricity after charging d [ n ] -amount of electricity before charging c [ n ])/(charging current a [ n ] × charging time period b [ n ]))/n;

when the charging times are less than the preset value, k takes the value in the interval of [0.83-0.95 ];

here, Σ ((post-charge electric quantity d [ n ] -pre-charge electric quantity c [ n ])/(charge current a [ n ] × charge time period b [ n ])) (post-charge electric quantity d (1) -pre-charge electric quantity c (1))/(charge current a (1) × charge time period b (1)) + (post-charge electric quantity d (2) -pre-charge electric quantity c (2))/(charge current a (2) × charge time period b (2)) + … … + (post-charge electric quantity d (n))/(charge current a (n)) × charge time period (b (n)).

4. The wireless quick charging method for the electric automobile according to claim 3, characterized in that:

when the energy storage efficiency x is less than or equal to 10%, a direct current charging mode is adopted;

when x is less than or equal to 30% by 10%, an alternating current charging mode is adopted;

when x is greater than 30%, a direct current charging mode is adopted.