Self-adaptive wireless charging control method and system

Abstract

The invention relates to the technical field of wireless charging, in particular to a self-adaptive wireless charging control method and system, and the method comprises the steps: determining the relative distance between a vehicle-mounted receiving end and a ground charging transmitting end; obtaining the coil facing area of the vehicle-mounted receiving end and the ground charging transmitting end; based on the relative distance between the vehicle-mounted receiving end and the ground charging transmitting end and the area over against the coil, switching of a magnetic coupling wireless charging mode is carried out; wireless charging is carried out on the ground charging transmitting terminal corresponding to the induction type magnetic coupling wireless charging start; adjusting the frequency signals of the ground charging transmitting end and the vehicle-mounted receiving end for wireless charging for the ground charging transmitting end which is switched to resonant magnetic coupling wireless charging; and the battery remaining capacity of the vehicle is obtained in real time, and the wireless charging power of the ground charging transmitting end is adjusted. And a proper magnetic coupling wireless charging mode is adaptively switched, so that efficient wireless charging of the vehicle can be realized under different conditions.

Description

Technical Field

[0001] The present invention relates to the field of wireless charging technology, and in particular to an adaptive wireless charging control method and system. Background Art

[0002] At present, various intelligent devices choose the electricity in the fixed power grid as the energy source, and use wired chargers to convert the power of the power grid to meet the power supply needs of electrical equipment. With the development of science and technology, the limitations of traditional wired charging methods are becoming increasingly prominent. For example, wired charging is not easy to carry, there are many power specifications and the power supply lines are exposed. Therefore, wireless charging methods are studied to replace wired charging methods. Wireless charging technology allows the two ends of the power transmission and reception to not need direct contact. For certain specific flammable and explosive links, it avoids the generation of electric sparks during the access process of the wires, eliminating the safety hazards during the charging process. And with the development of new energy vehicles such as electric vehicles, wireless charging technology has been further applied. However, there are still some defects in the current wireless charging system: First, most traditional wireless charging systems use a fixed charging power and cannot be adjusted according to the actual power requirements and battery status of the device; second, the charging system of traditional wireless charging parking lots is relatively fixed. Due to its low cost, most of them are inductive magnetic coupling charging methods. In addition, the ordinary electromagnetic coupling charging method requires the energy transmitting and receiving ends to be strictly aligned and the receiving end to be kept at a certain distance during charging, which limits the flexibility of electric vehicle charging and parking. In addition, parking charging that does not meet the standards further leads to low charging efficiency and energy waste. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an adaptive wireless charging control method, which is applied to a wireless charging system. The wireless charging system includes a ground charging transmitter and a vehicle-mounted receiver, including: S1. Determine the relative distance between the vehicle receiving terminal and the ground charging transmitting terminal based on the vehicle stop position and the installation position of the ground charging transmitting terminal; S2. Project the receiving coil of the vehicle-mounted receiving end onto the ground to obtain the area where the coils of the vehicle-mounted receiving end and the ground charging transmitting end face each other; S3, based on the relative distance between the vehicle-mounted receiving end and the ground charging transmitting end and the area facing the coil, switching the magnetic coupling wireless charging mode, wherein the magnetic coupling wireless charging includes inductive magnetic coupling wireless charging and resonant magnetic coupling wireless charging; S301, the relative distance between the vehicle receiving end and the ground charging transmitting end is compared with the preset distance threshold; if the relative distance is greater than or equal to the preset distance threshold, a type of information mark is performed; if the relative distance is less than the preset distance threshold, S302 operation is performed; S302, the area of ​​the coils facing the vehicle receiving end and the ground charging transmitting end is compared with the preset area threshold for secondary judgment; if the area of ​​the coils facing is greater than the preset area threshold, a second type of information mark is performed; if the area of ​​the coils facing is less than or equal to the preset area threshold, a first type of information mark is performed; S303, switching the magnetic coupling wireless charging mode based on the first type of information tag and the second type of information tag, wherein the first type of information tag controls switching to resonant magnetic coupling wireless charging; and the second type of information tag controls switching to inductive magnetic coupling wireless charging; S4. Based on the first and second type information tags, wireless charging is performed on the ground charging transmitter corresponding to the inductive magnetic coupling wireless charging start; for the ground charging transmitter switched to the resonant magnetic coupling wireless charging, the frequency signal between the ground charging transmitter and the vehicle-mounted receiving terminal is adjusted to perform wireless charging; S5. Obtain the remaining battery power of the vehicle in real time, compare the remaining battery power with a preset power threshold, and adjust the wireless charging power of the ground charging transmitter.

[0004] The step S4 of adjusting the frequency signal between the ground charging transmitter and the vehicle-mounted receiver for wireless charging includes: Read the frequency signals of all resonant magnetic coupling wireless charging in operation; Based on the occupied frequency signals, filter the unoccupied frequency signals in the frequency database; The charging frequency of the ground charging transmitter switched to resonant magnetic coupling wireless charging is adjusted to the filtered frequency signal; Based on the communication connection between the ground charging transmitter and the vehicle-mounted receiver, frequency signal matching is performed to carry out resonant wireless charging.

[0005] In S5, the remaining battery power is compared with the preset power threshold, and the wireless charging power of the ground charging transmitter is adjusted. The operation is as follows: S501, generating a wireless charging power adjustment trigger signal based on a comparison result of the remaining battery power and the power threshold; If the remaining battery power is less than or equal to the low power threshold, an adjustment trigger signal is generated to increase the wireless charging power; if the remaining battery power is greater than or equal to the high power threshold, an adjustment trigger signal is generated to reduce the wireless charging power; S502: According to the wireless charging power adjustment trigger signal, a preset value is increased or decreased to obtain an adjusted charging power value, and the final adjustment is confirmed with the wireless charging rated power of the vehicle-mounted receiving end.

[0006] In a specific implementation manner, the final adjustment and confirmation of the wireless charging rated power of the vehicle-mounted receiving terminal in S502 is specifically as follows: Obtain a charging power value adjusted by adding a preset value, and compare the charging power value with the wireless charging rated power of the vehicle-mounted receiving end. If the charging power value is greater than the wireless charging rated power, eliminate the adjustment trigger signal for increasing the wireless charging power generated by the corresponding ground charging transmitting end; If it is less than the rated power of wireless charging, the wireless charging power of the corresponding ground charging transmitter is triggered to increase the power; The ground charging transmitting end that generates the adjustment trigger signal for reducing the wireless charging power is triggered to adjust the wireless charging power to reduce the power.

[0007] The adaptive wireless charging control method further includes acquiring the charging power of all ground charging transmitters and comparing the charging power with the rated total power of the wireless charging system.

[0008] The charging power of all ground charging transmitters is obtained and compared with the rated total power of the wireless charging system. The specific operation is as follows: Obtain the sum of the charging powers of the inductive magnetic coupling wireless charging and the resonant magnetic coupling wireless charging at the ground charging transmitter, and compare it with the rated total power; If the sum of the charging powers is greater than the rated total power, the ground charging transmitter of the inductive magnetic coupling wireless charging is confirmed, and the ground charging transmitter corresponding to the remaining battery power of the vehicle between the low power threshold and the high power threshold is selected; Sort by charging start time, and reduce the charging power of the ground charging transmitter with the latest charging start time in turn until the sum of the charging powers is less than the rated total power.

[0009] The relative distance in S1 is based on the projection of the transmitting coil of the ground charging transmitting end to the center of the circle on the ground, and determines the distance from the vehicle-mounted receiving end to the center of the circle.

[0010] On the other hand, an adaptive wireless charging system is provided, comprising: A distance confirmation module is used to determine the relative distance between the vehicle receiving terminal and the ground charging transmitter based on the vehicle stop position and the installation position of the ground charging transmitter; The area confirmation module is used to project the receiving coil of the vehicle receiving end onto the ground to obtain the area where the coils of the vehicle receiving end and the ground charging transmitting end face each other; A charging switching module, used to switch the magnetic coupling wireless charging mode based on the relative distance between the vehicle-mounted receiving terminal and the ground charging transmitting terminal and the area directly facing the coil, wherein the magnetic coupling wireless charging includes inductive magnetic coupling wireless charging and resonant magnetic coupling wireless charging; The relative distance between the vehicle-mounted receiving end and the ground charging transmitting end is compared with the preset distance threshold for a first judgment; if the relative distance is greater than or equal to the preset distance threshold, a first-class information mark is performed; if the relative distance is less than the preset distance threshold, the coil-facing area between the vehicle-mounted receiving end and the ground charging transmitting end is compared with the preset area threshold for a second judgment; if the coil-facing area is greater than the preset area threshold, a second-class information mark is performed; if the coil-facing area is less than or equal to the preset area threshold, a first-class information mark is performed; The magnetic coupling wireless charging mode is switched based on the first type of information tag and the second type of information tag, wherein the first type of information tag controls the switching to resonant magnetic coupling wireless charging; and the second type of information tag controls the switching to inductive magnetic coupling wireless charging; The charging adjustment module is used to wirelessly charge the ground charging transmitter corresponding to the inductive magnetic coupling wireless charging startup based on the first and second type information tags; for the ground charging transmitter switched to the resonant magnetic coupling wireless charging, the frequency signal between the ground charging transmitter and the vehicle-mounted receiving terminal is adjusted to perform wireless charging; The power control module is used to obtain the remaining battery power of the vehicle in real time, compare the remaining battery power with the preset power threshold, and adjust the wireless charging power of the ground charging transmitter.

[0011] The beneficial effect is that the present invention is an adaptive wireless charging control method and system, which can adaptively switch to a suitable magnetic coupling wireless charging mode by obtaining the relative distance between the vehicle-mounted receiving end and the ground charging transmitting end of the wireless charging system and the area facing the coil, and can adapt to the distance changes and misalignment between the vehicle and the ground charging transmitting end, thereby ensuring efficient wireless charging of the vehicle under different conditions; at the same time, it monitors the residual current of the vehicle's battery in real time, and intelligently adjusts the wireless charging power of the ground charging transmitting end to avoid problems such as battery overcharging or excessive charging power causing equipment damage, thereby improving the stability and safety of wireless charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a flow chart of an adaptive wireless charging control method; Figure 2 The circuit structure diagram of inductive magnetic coupling wireless charging; Figure 3 This is a circuit diagram of resonant magnetic coupling wireless charging; Figure 4 This is a diagram of the relative distance between the ground charging transmitter and the vehicle-mounted receiver, as well as the area facing the coil. DETAILED DESCRIPTION

[0013] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0014] See also Figure 1 , Figure 4 This embodiment provides an adaptive wireless charging control method, which is applied to a wireless charging system. The wireless charging system includes a ground charging transmitter and a vehicle-mounted receiver. The vehicle-mounted receiver can receive electromagnetic signals emitted by the ground charging transmitter and convert them into electrical energy to charge the vehicle battery. The specific implementation steps of the method are as follows: S1. Determine the relative distance between the vehicle receiving terminal and the ground charging transmitting terminal based on the vehicle stop position and the installation position of the ground charging transmitting terminal; When a vehicle is parked in a wireless charging parking space, the sensor equipment of the wireless charging system identifies the vehicle and matches the communication signals between the ground charging transmitter and the vehicle receiving terminal. According to the communication signal transmitted by the vehicle receiving terminal, the vehicle receiving terminal is accurately positioned to determine the relative position of the vehicle charging terminal and the ground charging transmitter.

[0015] And based on the center position of the projection of the transmitting coil of the ground charging transmitting end to the ground, the distance from the on-board receiving end to the center position of the ground charging transmitting end is determined.

[0016] S2. Project the receiving coil of the vehicle-mounted receiving end onto the ground to obtain the area where the coils of the vehicle-mounted receiving end and the ground charging transmitting end face each other; The size information of the receiving coil of the vehicle receiving end is identified through the communication signal between the ground charging transmitter and the vehicle receiving end. According to the positioning position of the vehicle receiving end, the receiving coil is projected onto the ground to obtain the projection area of ​​the receiving coil, and the overlapping area of ​​the two coils is determined with the projection area of ​​the transmitting coil of the ground charging transmitter, which is the area facing the coil.

[0017] S3, based on the relative distance between the vehicle-mounted receiving end and the ground charging transmitting end and the area facing the coil, switching the magnetic coupling wireless charging mode, wherein the magnetic coupling wireless charging includes inductive magnetic coupling wireless charging and resonant magnetic coupling wireless charging; like Figure 2 , Figure 3 As shown, the inductive magnetic coupling wireless charging has a lower driving frequency and a shorter transmission distance, and is suitable for wireless charging with a fixed distance and no misalignment; the resonant magnetic coupling wireless charging has a high driving frequency and a long transmission distance, and is suitable for wireless charging at a long distance or with misalignment.

[0018] When the vehicle-mounted receiving end receives the electromagnetic signal from the ground charging transmitting end for wireless charging, the vehicle-mounted receiving end may not be able to completely face the ground charging transmitting end due to factors such as different vehicle models, different chassis heights, different sizes of the receiving coils of the vehicle-mounted receiving end, and the difference between the driver's parking position and the actual parking position, so that the axis positions of the winding coils of the vehicle-mounted receiving end and the ground charging transmitting end are not perpendicular, thereby affecting the actual wireless charging power.

[0019] Therefore, based on the relative distance between the vehicle receiving end and the ground charging transmitting end, and the area facing the coil, the magnetic coupling wireless charging mode is switched. The specific method is as follows: S301, the relative distance between the vehicle receiving end and the ground charging transmitting end is compared with the preset distance threshold; if the relative distance is greater than or equal to the preset distance threshold, a type of information mark is performed; if the relative distance is less than the preset distance threshold, S302 operation is performed; S302, performing a secondary judgment on the area of ​​the coils of the vehicle-mounted receiving end and the ground charging transmitting end, and comparing it with a preset area threshold, where the preset area threshold is half of the projection area of ​​the transmitting coil of the ground charging transmitting end; If the area facing the coil is greater than the preset area threshold, a second-class information mark is performed; if the area facing the coil is less than or equal to the preset area threshold, a first-class information mark is performed; S303, switching the magnetic coupling wireless charging mode based on the first type of information tag and the second type of information tag, wherein the first type of information tag is switched to resonant magnetic coupling wireless charging; and the second type of information tag is switched to inductive magnetic coupling wireless charging; The type of information mark indicates the relative distance between the vehicle-mounted receiving terminal and the ground charging transmitting terminal or the area directly facing the coil. There is an impact of the distance or misalignment between the ground charging transmitting terminal and the vehicle-mounted receiving terminal. The inductive magnetic coupling wireless charging cannot perform normal wireless charging for the vehicle battery. The charging efficiency of the vehicle-mounted receiving terminal through inductive magnetic coupling wireless charging is low. Therefore, switching to resonant magnetic coupling wireless charging for long-distance wireless charging or coil-facing area misalignment is not affected by distance and misalignment.

[0020] The second type of information mark indicates the relative distance between the vehicle-mounted receiving terminal and the ground charging transmitting terminal or the area facing the coil, which meets the charging factor standard of inductive magnetic coupling wireless charging, that is, wireless charging is performed through inductive magnetic coupling wireless charging.

[0021] S4. Based on the first and second type information tags, wireless charging is performed on the ground charging transmitter corresponding to the inductive magnetic coupling wireless charging start; for the ground charging transmitter switched to the resonant magnetic coupling wireless charging, the frequency signal between the ground charging transmitter and the vehicle-mounted receiving terminal is adjusted to perform wireless charging; The ground charging transmitter switched to resonant magnetic coupling wireless charging adjusts the frequency signal between the ground charging transmitter and the vehicle-mounted receiving terminal for wireless charging, and the operation is as follows: Read the frequency signals of all resonant magnetic coupling wireless charging in operation; Based on the occupied frequency signals, filter the unoccupied frequency signals in the frequency database; The charging frequency of the ground charging transmitter switched to resonant magnetic coupling wireless charging is adjusted to the filtered frequency signal; the frequency signal of the resonant coil is adjusted to the filtered frequency signal through the capacitor and oscillator of the ground charging transmitter; Based on the communication connection between the ground charging transmitter and the vehicle-mounted receiver, frequency signal matching is performed to carry out resonant wireless charging.

[0022] S5. Obtain the remaining battery power of the vehicle in real time, compare the remaining battery power with a preset power threshold, and adjust the wireless charging power of the ground charging transmitter; The remaining battery power of the charging vehicle is obtained according to the battery management system, and is fed back to the ground charging transmitter through the vehicle-mounted receiver, and the remaining battery power is compared with the preset power threshold, which includes a low power threshold and a high power threshold. It adjusts the wireless charging power of the ground charging transmitter, and the specific adjustment operation is as follows: S501, generating a wireless charging power adjustment trigger signal based on a comparison result of the remaining battery power and the power threshold; If the remaining battery power is less than or equal to the low power threshold, an adjustment trigger signal is generated to increase the wireless charging power; if the remaining battery power is greater than or equal to the high power threshold, an adjustment trigger signal is generated to reduce the wireless charging power.

[0023] S502: According to the wireless charging power adjustment trigger signal, increase or decrease a preset value to obtain an adjusted charging power value, and make a final adjustment confirmation with the wireless charging rated power of the vehicle receiving end; Acquire the wireless charging rated power information of the on-board receiving terminal of each charging vehicle, and trigger and adjust the charging power of the inductive magnetic coupling wireless charging or the resonant magnetic coupling wireless charging according to the wireless charging power adjustment trigger signal of S501; Obtain a charging power value adjusted by adding a preset value, and compare the charging power value with the wireless charging rated power of the vehicle receiving end. If it is greater than the wireless charging rated power, the adjustment trigger signal for increasing the wireless charging power generated by the corresponding ground charging transmitting end is eliminated; if it is less than the wireless charging rated power, the wireless charging power of the corresponding ground charging transmitting end is triggered to increase the power. At the same time, the ground charging transmitting end that generates the adjustment trigger signal for reducing the wireless charging power is triggered to adjust the wireless charging power to reduce the power.

[0024] At the same time, while S5 adjusts the charging power of the ground charging transmitter according to the remaining battery power of the vehicle, it also includes obtaining the charging power of all ground charging transmitters and comparing it with the rated total power of the wireless charging system to avoid overloading the wireless charging system due to increasing the wireless charging power. The specific operations are as follows: Obtain the sum of the charging powers of the inductive magnetic coupling wireless charging and the resonant magnetic coupling wireless charging at the ground charging transmitter, and compare it with the rated total power; If the sum of the charging powers is greater than the rated total power, the ground charging transmitter of the inductive magnetic coupling wireless charging is confirmed, and the ground charging transmitter corresponding to the remaining battery power of the vehicle between the low power threshold and the high power threshold is selected; Sort by charging start time, and reduce the charging power of the ground charging transmitter with the latest charging start time in turn until the sum of the charging powers is less than the rated total power, to avoid equipment damage caused by overload of the wireless charging system. Prioritize reducing the charging power of the ground charging transmitter with the latest charging start time, and do not reduce the charging power of the ground charging transmitter with the earliest charging start time, so that the vehicle with the earliest charging start time can complete wireless charging as soon as possible. After the vehicle with the earliest charging start time finishes wireless charging, the charging power capacity of the wireless charging system can be released.

[0025] In addition, an adaptive wireless charging system is provided, comprising: A distance confirmation module is used to determine the relative distance between the vehicle receiving terminal and the ground charging transmitter based on the vehicle stop position and the installation position of the ground charging transmitter; The area confirmation module is used to project the receiving coil of the vehicle receiving end onto the ground to obtain the area where the coils of the vehicle receiving end and the ground charging transmitting end face each other; A charging switching module, used to switch the magnetic coupling wireless charging mode based on the relative distance between the vehicle-mounted receiving terminal and the ground charging transmitting terminal and the area directly facing the coil, wherein the magnetic coupling wireless charging includes inductive magnetic coupling wireless charging and resonant magnetic coupling wireless charging; The relative distance between the vehicle-mounted receiving end and the ground charging transmitting end is compared with the preset distance threshold for a first judgment; if the relative distance is greater than or equal to the preset distance threshold, a first-class information mark is performed; if the relative distance is less than the preset distance threshold, the coil-facing area between the vehicle-mounted receiving end and the ground charging transmitting end is compared with the preset area threshold for a second judgment; if the coil-facing area is greater than the preset area threshold, a second-class information mark is performed; if the coil-facing area is less than or equal to the preset area threshold, a first-class information mark is performed; The magnetic coupling wireless charging mode is switched based on the first type of information tag and the second type of information tag, wherein the first type of information tag controls the switching to resonant magnetic coupling wireless charging; and the second type of information tag controls the switching to inductive magnetic coupling wireless charging; The charging adjustment module is used to wirelessly charge the ground charging transmitter corresponding to the inductive magnetic coupling wireless charging startup based on the first and second type information tags; for the ground charging transmitter switched to the resonant magnetic coupling wireless charging, the frequency signal between the ground charging transmitter and the vehicle-mounted receiving terminal is adjusted to perform wireless charging; The power control module is used to obtain the remaining battery power of the vehicle in real time, compare the remaining battery power with the preset power threshold, and adjust the wireless charging power of the ground charging transmitter.

Claims

1. An adaptive wireless charging control method, applied to a wireless charging system, wherein the wireless charging system comprises a ground charging transmitter and a vehicle-mounted receiver, characterized in that: include: S1. Determine the relative distance between the vehicle receiving terminal and the ground charging transmitting terminal based on the vehicle stop position and the installation position of the ground charging transmitting terminal; S2. Project the receiving coil of the vehicle-mounted receiving end onto the ground to obtain the area where the coils of the vehicle-mounted receiving end and the ground charging transmitting end face each other; S3, based on the relative distance between the vehicle-mounted receiving end and the ground charging transmitting end and the area facing the coil, switching the magnetic coupling wireless charging mode, wherein the magnetic coupling wireless charging includes inductive magnetic coupling wireless charging and resonant magnetic coupling wireless charging; S301, the relative distance between the vehicle receiving end and the ground charging transmitting end is compared with the preset distance threshold; if the relative distance is greater than or equal to the preset distance threshold, a type of information mark is performed; if the relative distance is less than the preset distance threshold, S302 operation is performed; S302, the area of ​​the coils facing each other between the vehicle-mounted receiving end and the ground charging transmitting end is compared with the preset area threshold; if the area of ​​the coils facing each other is greater than the preset area threshold, a second type of information mark is performed; If the area facing the coil is less than or equal to the preset area threshold, a type of information marking is performed; S303, switching the magnetic coupling wireless charging mode based on the first type of information tag and the second type of information tag, wherein the first type of information tag controls switching to resonant magnetic coupling wireless charging; The second type of information tag controls switching to inductive magnetic coupling wireless charging; S4. Based on the first and second type information tags, wireless charging is performed on the ground charging transmitter corresponding to the inductive magnetic coupling wireless charging start; for the ground charging transmitter switched to the resonant magnetic coupling wireless charging, the frequency signal between the ground charging transmitter and the vehicle-mounted receiving terminal is adjusted to perform wireless charging; S5. Obtain the remaining battery power of the vehicle in real time, compare the remaining battery power with a preset power threshold, and adjust the wireless charging power of the ground charging transmitter.

2. The adaptive wireless charging control method according to claim 1, characterized in that: The step S4 of adjusting the frequency signal between the ground charging transmitter and the vehicle-mounted receiver for wireless charging includes: Read the frequency signals of all resonant magnetic coupling wireless charging in operation; Based on the occupied frequency signals, filter the unoccupied frequency signals in the frequency database; The charging frequency of the ground charging transmitter switched to resonant magnetic coupling wireless charging is adjusted to the filtered frequency signal; Based on the communication connection between the ground charging transmitter and the vehicle-mounted receiver, frequency signal matching is performed to carry out resonant wireless charging.

3. The adaptive wireless charging control method according to claim 1, characterized in that: In S5, the remaining battery power is compared with the preset power threshold, and the wireless charging power of the ground charging transmitter is adjusted. The operation is as follows: S501, generating a wireless charging power adjustment trigger signal based on a comparison result of the remaining battery power and the power threshold; If the remaining battery power is less than or equal to the low power threshold, an adjustment trigger signal is generated to increase the wireless charging power; if the remaining battery power is greater than or equal to the high power threshold, an adjustment trigger signal is generated to reduce the wireless charging power; S502: According to the wireless charging power adjustment trigger signal, a preset value is increased or decreased to obtain an adjusted charging power value, and the final adjustment is confirmed with the wireless charging rated power of the vehicle-mounted receiving end.

4. The adaptive wireless charging control method according to claim 3, characterized in that: The final adjustment and confirmation of the wireless charging rated power with the vehicle-mounted receiving terminal in S502 is specifically as follows: Obtain a charging power value adjusted by adding a preset value, and compare the charging power value with the wireless charging rated power of the vehicle-mounted receiving end. If the charging power value is greater than the wireless charging rated power, eliminate the adjustment trigger signal for increasing the wireless charging power generated by the corresponding ground charging transmitting end; If it is less than the rated power of wireless charging, the wireless charging power of the corresponding ground charging transmitter is triggered to increase the power; The ground charging transmitting end that generates the adjustment trigger signal for reducing the wireless charging power is triggered to adjust the wireless charging power to reduce the power.

5. The adaptive wireless charging control method according to claim 1, characterized in that: It also includes obtaining the charging power of all ground charging transmitters and comparing it with the rated total power of the wireless charging system.

6. The adaptive wireless charging control method according to claim 5, characterized in that: The charging power of all ground charging transmitters is obtained and compared with the rated total power of the wireless charging system. The specific operation is as follows: Obtain the sum of the charging powers of the inductive magnetic coupling wireless charging and the resonant magnetic coupling wireless charging at the ground charging transmitter, and compare it with the rated total power; If the sum of the charging powers is greater than the rated total power, the ground charging transmitter of the inductive magnetic coupling wireless charging is confirmed, and the ground charging transmitter corresponding to the remaining battery power of the vehicle between the low power threshold and the high power threshold is selected; Sort by charging start time, and reduce the charging power of the ground charging transmitter with the latest charging start time in turn until the sum of the charging powers is less than the rated total power.

7. The adaptive wireless charging control method according to claim 1, characterized in that: The relative distance in S1 is based on the projection of the transmitting coil of the ground charging transmitting end to the center of the circle on the ground, and determines the distance from the vehicle-mounted receiving end to the center of the circle.

8. An adaptive wireless charging system, characterized in that: include: A distance confirmation module is used to determine the relative distance between the vehicle receiving terminal and the ground charging transmitter based on the vehicle stop position and the installation position of the ground charging transmitter; The area confirmation module is used to project the receiving coil of the vehicle receiving end onto the ground to obtain the area where the coils of the vehicle receiving end and the ground charging transmitting end face each other; A charging switching module is used to switch the magnetic coupling wireless charging mode based on the relative distance between the vehicle-mounted receiving terminal and the ground charging transmitting terminal and the area facing the coil, wherein the magnetic coupling wireless charging includes inductive magnetic coupling wireless charging and resonant magnetic coupling wireless charging; the relative distance between the vehicle-mounted receiving terminal and the ground charging transmitting terminal is compared with a preset distance threshold; if the relative distance is greater than or equal to the preset distance threshold, a first type of information mark is performed; if the relative distance is less than the preset distance threshold, a second type of information mark is performed based on the area facing the coil between the vehicle-mounted receiving terminal and the ground charging transmitting terminal and a preset area threshold; if the area facing the coil is greater than the preset area threshold, a second type of information mark is performed; If the area facing the coil is less than or equal to the preset area threshold, a type of information marking is performed; The magnetic coupling wireless charging mode is switched based on the first type of information tag and the second type of information tag, wherein the first type of information tag controls the switching to resonant magnetic coupling wireless charging; and the second type of information tag controls the switching to inductive magnetic coupling wireless charging; The charging adjustment module is used to wirelessly charge the ground charging transmitter corresponding to the inductive magnetic coupling wireless charging startup based on the first and second type information tags; for the ground charging transmitter switched to the resonant magnetic coupling wireless charging, the frequency signal between the ground charging transmitter and the vehicle-mounted receiving terminal is adjusted to perform wireless charging; The power control module is used to obtain the remaining battery power of the vehicle in real time, compare the remaining battery power with the preset power threshold, and adjust the wireless charging power of the ground charging transmitter.

Images