Vehicle wireless charging device and charging method and vehicle

Abstract

The embodiment of the invention discloses a vehicle wireless charging device and charging method and a vehicle, and belongs to the technical field of vehicle wireless charging. The wireless charging device comprises a control module, a power source, a transmitting coil, a monitoring module, a positioning module, a position adjusting module and a first voltage conversion module; the control module is used for controlling the positioning module to determine the position of the receiving coil according to the detection signal transmitted by the monitoring module, receiving a first positioning signal transmitted by the positioning module, controlling the position adjusting module to adjust the position of the vehicle according to the first positioning signal, and receiving a second positioning signal transmitted by the positioning module; and the control module is also used for controlling the first voltage conversion module according to the second positioning signal so as to transmit the power output by the power source through the transmitting coil. According to the invention, accurate alignment between the wireless charging device and the vehicle can be realized, and the charging efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle wireless charging technology, and more particularly to a vehicle wireless charging device, charging method, and vehicle. Background Technology

[0002] With the increasing popularity of electric vehicles, charging convenience has become a key factor influencing user experience and market promotion. Traditional wired charging requires users to manually plug and unplug the charging gun, which is not only cumbersome but also poses safety hazards in inclement weather conditions (such as rain and snow). Furthermore, the charging interface is prone to wear and tear and poor contact after prolonged use. In addition, in some public places, limited charging spaces and messy charging cables negatively impact the overall environment and efficiency. Therefore, wireless charging technology has emerged, enabling vehicles to automatically charge while parked without manual intervention, greatly improving charging convenience and user experience. However, existing wireless charging technologies for automobiles still face many challenges, such as low charging efficiency, significant energy loss during charging, and the high precision required for positioning between the charging device and the vehicle, which limits the large-scale application of wireless charging technology. Summary of the Invention

[0003] This invention provides a wireless charging device, charging method, and vehicle for vehicles, enabling precise alignment between the wireless charging device and the vehicle and improving charging efficiency.

[0004] According to one aspect of the present invention, a wireless charging device for a vehicle is provided, comprising:

[0005] Control module;

[0006] Power source;

[0007] The transmitting coil is coupled to the receiving coil on the vehicle.

[0008] A monitoring module is connected to the control module. The monitoring module outputs a detection signal to the control module when a vehicle enters the wireless charging area.

[0009] The positioning module and the position adjustment module are both connected to the control module. The control module is used to control the positioning module to determine the position of the receiving coil according to the detection signal, and to receive the first positioning signal transmitted by the positioning module. The control module is also used to control the position adjustment module to adjust the position of the vehicle according to the first positioning signal so that the transmitting coil and the receiving coil are aligned, and to receive the second positioning signal transmitted by the positioning module.

[0010] The first voltage conversion module is connected to the control module, the power source, and the transmitting coil. The control module is also used to control the first voltage conversion module according to the second positioning signal so that the power output by the power source is transmitted through the transmitting coil. The receiving coil couples the magnetic field of the transmitting coil and converts it into electrical energy, which is then used to charge the battery through the rectifier module and the second voltage conversion module on the vehicle.

[0011] Optionally, the positioning module includes an ultrasonic positioning unit, a visual recognition positioning unit, an electromagnetic induction positioning unit, and a data processing unit. The ultrasonic positioning unit, the visual recognition positioning unit, and the electromagnetic induction positioning unit are all connected to the data processing unit, and the data processing unit is connected to the control module.

[0012] The ultrasonic positioning unit is used to send ultrasonic signals to the area where the receiving coil is located, and to receive ultrasonic signals reflected from the area where the receiving coil is located. By the time difference between sending the ultrasonic signals and receiving the ultrasonic signals, the distance and relative position of the transmitting coil and the receiving coil are determined, and the first positioning information is transmitted to the data processing unit.

[0013] The visual recognition and positioning unit is used to collect image information of the area where the receiving coil is located, and determine the center position and orientation of the receiving coil based on the internally stored image recognition algorithm, and transmit the second positioning information to the data processing unit;

[0014] The electromagnetic induction positioning unit is used to determine the relative position of the transmitting coil and the receiving coil based on the change in mutual inductance between the transmitting coil and the receiving coil, and to transmit third positioning information to the data processing unit.

[0015] The data processing unit is used to fuse the received first positioning information, second positioning information and third positioning information to form the first positioning signal and the second positioning signal, and transmit them to the control module.

[0016] Optionally, both the transmitting coil and the receiving coil adopt a flat helical coil structure.

[0017] Optionally, the vehicle wireless charging device further includes: a first communication module;

[0018] The first communication module is connected to the control module and wirelessly connected to the second communication module on the vehicle. The first communication module receives charging parameters transmitted by the second communication module. The control module is also used to control the first voltage conversion module according to the charging parameters to adjust the output power of the first voltage conversion module.

[0019] Optionally, the receiving coil includes an adaptive tuning circuit;

[0020] The adaptive tuning circuit is used to adjust the resonant frequency of the receiving coil according to the magnetic field frequency and magnetic field strength of the transmitting coil.

[0021] According to another aspect of the present invention, a vehicle wireless charging method is provided for controlling the vehicle wireless charging device provided in any embodiment of the present invention.

[0022] The method includes:

[0023] When a vehicle enters the wireless charging area, the monitoring module outputs a detection signal to the control module.

[0024] The control module controls the positioning module to determine the position of the receiving coil according to the detection signal, and receives the first positioning signal transmitted by the positioning module. The control module controls the position adjustment module to adjust the position of the vehicle according to the first positioning signal so that the transmitting coil and the receiving coil are aligned, and receives the second positioning signal transmitted by the positioning module. The control module controls the first voltage conversion module according to the second positioning signal to transmit the power output by the power source to the receiving coil on the vehicle through the transmitting coil.

[0025] Optionally, the vehicle wireless charging device further includes a first communication module, which is connected to the control module and wirelessly connected to a second communication module on the vehicle.

[0026] The method further includes:

[0027] During the charging process, the first communication module and the second communication module exchange charging parameters in real time to monitor the charging status of the transmitting coil, the receiving coil, and the battery; wherein, the charging parameters include charging voltage, charging current, battery power, and battery temperature.

[0028] Optionally, the vehicle wireless charging method further includes:

[0029] When the charging parameters are not within the preset range, the control module outputs a first control signal, and the first voltage conversion module responds to the first control signal by reducing the output power.

[0030] Optionally, the vehicle wireless charging method further includes:

[0031] After charging is completed, the control module outputs a second control signal, the first voltage conversion module responds to the second control signal and stops outputting power, and the control module controls the positioning module and the position adjustment module to shut down.

[0032] According to another aspect of the present invention, a vehicle is provided, the vehicle including a receiving coil, a rectifier module, and a second voltage conversion module; the receiving coil is coupled to the transmitting coil in the vehicle wireless charging device provided in any embodiment of the present invention;

[0033] The receiving coil couples the magnetic field of the transmitting coil and converts it into electrical energy, which is then used to charge the battery through the rectifier module and the second voltage conversion module on the vehicle.

[0034] The vehicle also includes a capacitor compensation module connected to the receiving coil, the capacitor compensation module being used to adjust the equivalent impedance of the receiving coil.

[0035] The technical solution of this invention, by setting a vehicle wireless charging device including a control module, a power source, a transmitting coil, a monitoring module, a positioning module, a position adjustment module, and a first voltage conversion module, can achieve precise alignment between the wireless charging device and the vehicle. This eliminates the need for users to manually plug and unplug the charging gun; simply driving the vehicle into the wireless charging area allows the wireless charging device to automatically complete the positioning, alignment, and charging process, greatly simplifying the charging operation. It is particularly suitable for use in busy public places or in inclement weather conditions, providing users with a more convenient charging experience, improving charging convenience and safety, enhancing the usability and user satisfaction of electric vehicles, and promoting the market penetration of electric vehicles. By setting a first voltage conversion module and a second voltage conversion module, charging efficiency can be improved, reaching levels comparable to or even higher than traditional wired charging, effectively reducing charging time and energy loss, improving vehicle charging efficiency and energy utilization efficiency, and lowering user operating costs. Wireless charging avoids the wear and tear and poor contact problems caused by frequent plugging and unplugging of traditional wired charging interfaces, thereby reducing maintenance costs for charging equipment and vehicle charging interfaces and extending the service life of the equipment. Since wireless charging technology eliminates the need for charging cables, it avoids the clutter and safety hazards caused by charging cables in public places, making the charging area cleaner and more aesthetically pleasing, and improving the overall environmental quality.

[0036] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a vehicle wireless charging device provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of another vehicle wireless charging device provided in an embodiment of the present invention;

[0040] Figure 3 A flowchart of a vehicle wireless charging method provided in an embodiment of the present invention;

[0041] Figure 4 This is a structural schematic diagram of a vehicle provided in an embodiment of the present invention. Detailed Implementation

[0042] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and their variations, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0044] This invention provides a wireless charging device for vehicles. Figure 1 This is a schematic diagram of a vehicle wireless charging device provided in an embodiment of the present invention. See also... Figure 1 The vehicle wireless charging device includes a control module 10, a power source 300, a transmitting coil X1, a monitoring module 20, a positioning module 30, a position adjustment module 40, and a first voltage conversion module 50.

[0045] The transmitting coil X1 is coupled to the receiving coil X2 on the vehicle. The monitoring module 20 is connected to the control module 10 and outputs a detection signal to the control module 10 when a vehicle enters the wireless charging area. The positioning module 30 and the position adjustment module 40 are both connected to the control module 10. The control module 10 controls the positioning module 30 to determine the position of the receiving coil X2 according to the detection signal and receives the first positioning signal transmitted by the positioning module 30. The control module 10 is also used to control the position adjustment module 40 to adjust the position of the vehicle according to the first positioning signal so that the transmitting coil X1 and the receiving coil X2 are aligned, and to receive the second positioning signal transmitted by the positioning module 30. The first voltage conversion module 50 is connected to the control module 10, the power source 300 and the transmitting coil X1. The control module 10 is also used to control the first voltage conversion module 50 according to the second positioning signal so that the power output by the power source 300 is transmitted through the transmitting coil X1. The receiving coil X2 couples the magnetic field of the transmitting coil X1 and converts it into electrical energy, which is then used to charge the battery 22 through the rectifier module 60 and the second voltage conversion module 70 on the vehicle.

[0046] The monitoring module 20 can be a millimeter-wave radar or infrared sensor, capable of quickly detecting the arrival of a vehicle. The vehicle wireless charging device can be installed underground, and the power source 300 can be connected to the first voltage conversion module 50 via a power supply bus. The first voltage conversion module 50 converts the AC power input from the power source 300 into a high-frequency AC signal suitable for wireless transmission. The first voltage conversion module 50 can employ an advanced full-bridge inverter circuit, coupled with high-performance power semiconductor devices, to achieve high power conversion efficiency. Furthermore, by introducing an intelligent power adjustment algorithm, the output power can be adjusted in real time according to the vehicle's needs, avoiding energy waste. The position adjustment module 40 may include a motor-driven rotating platform and a lifting mechanism.

[0047] The control module 10, power source 300, transmitting coil X1, monitoring module 20, positioning module 30, position adjustment module 40 and first voltage conversion module 50 are disposed at the power transmitting end 500, and the receiving coil X2, rectifier unit 60, second voltage conversion module 70 and battery 22 are disposed at the power receiving end 600.

[0048] Specifically, when a vehicle enters the wireless charging area, the monitoring module 20 outputs a detection signal upon detecting the vehicle's arrival. Upon receiving this signal, the control module 10 activates the positioning module 30 and the position adjustment module 40. The positioning module 30, through the coordinated operation of multiple positioning technologies, accurately locates the position and orientation of the receiving coil X2 on the vehicle, generating a first positioning signal that is transmitted to the control module 10. Based on the positioning information (including position and orientation) of the receiving coil X2, the control module 10 drives the position adjustment module 40 to adjust the vehicle's position, thereby achieving high-precision alignment between the transmitting coil X1 and the receiving coil X2. Simultaneously, the positioning module 30 monitors the alignment status of the transmitting coil X1 and the receiving coil X2 in real time during the alignment process and feeds back the monitoring data to the control module 10, ensuring that the alignment accuracy remains within the specified range. After the transmitting coil X1 and receiving coil X2 are aligned, the positioning module 30 generates a second positioning signal and transmits it to the control module 10. The control module 10 then controls the first voltage conversion module 50 to start working, converting the AC power output from the power source 300 into high-frequency AC power and transmitting a magnetic field through the transmitting coil X1. The receiving coil X2 senses the magnetic field and converts it into electrical energy. The rectifier module 60 converts the high-frequency AC power sensed by the receiving coil X2 into DC power, which is then converted by the second voltage conversion module 70 to charge the vehicle battery 22. In other words, the vehicle wireless charging device can achieve automatic vehicle positioning, alignment, and wireless charging. Furthermore, by setting up the first voltage conversion module 50 and the second voltage conversion module 70, the voltage conversion efficiency and energy utilization rate can be improved.

[0049] The technical solution of this invention, by setting a vehicle wireless charging device including a control module, a power source, a transmitting coil, a monitoring module, a positioning module, a position adjustment module, and a first voltage conversion module, can achieve precise alignment between the wireless charging device and the vehicle. This eliminates the need for users to manually plug and unplug the charging gun; simply driving the vehicle into the wireless charging area allows the wireless charging device to automatically complete the positioning, precise alignment, and charging process, greatly simplifying the charging operation. It is particularly suitable for use in busy public places or in inclement weather conditions, providing users with a more convenient charging experience, improving charging convenience and safety, enhancing the usability and user satisfaction of electric vehicles, and promoting the market penetration of electric vehicles. By setting a first voltage conversion module and a second voltage conversion module, charging efficiency can be improved, reaching levels comparable to or even higher than traditional wired charging, effectively reducing charging time and energy loss, improving vehicle charging efficiency and energy utilization efficiency, and lowering user operating costs. Wireless charging avoids the wear and tear and poor contact problems caused by frequent plugging and unplugging of traditional wired charging interfaces, thereby reducing maintenance costs for charging equipment and vehicle charging interfaces and extending the service life of the equipment. Since wireless charging technology eliminates the need for charging cables, it avoids the clutter and safety hazards caused by charging cables in public places, making the charging area cleaner and more aesthetically pleasing, and improving the overall environmental quality.

[0050] See also Figure 1 Based on the above embodiments, optionally, the positioning module includes an ultrasonic positioning unit, a visual recognition positioning unit, an electromagnetic induction positioning unit, and a data processing unit. The ultrasonic positioning unit, the visual recognition positioning unit, and the electromagnetic induction positioning unit are all connected to the data processing unit, and the data processing unit is connected to the control module.

[0051] The ultrasonic positioning unit transmits ultrasonic signals to the area where the receiving coil is located and receives ultrasonic signals reflected from the same area. By analyzing the time difference between the transmitted and received ultrasonic signals, it determines the distance and relative position of the transmitting and receiving coils and transmits first positioning information to the data processing unit. The visual recognition positioning unit acquires image information of the area where the receiving coil is located and determines the center position and orientation of the receiving coil based on an internally stored image recognition algorithm, transmitting second positioning information to the data processing unit. The electromagnetic induction positioning unit determines the relative position of the transmitting and receiving coils based on the change in mutual inductance between them and transmits third positioning information to the data processing unit. The data processing unit fuses the received first, second, and third positioning information to form a first positioning signal and a second positioning signal, and transmits these signals to the control module.

[0052] The technical solution of this invention integrates multiple positioning technologies. The positioning module can accurately determine the distance and relative position between the transmitting and receiving coils based on ultrasonic positioning, determine the center position and orientation of the receiving coil based on visual recognition positioning, and further precisely calibrate the alignment accuracy based on electromagnetic induction positioning. Thus, the data processing unit integrates and complements these multiple positioning technologies, enabling high-precision alignment of the transmitting and receiving coils when the vehicle is parked, significantly improving the efficiency and stability of wireless charging.

[0053] See also Figure 1 Based on the above embodiments, optionally, the receiving coil X2 includes an adaptive tuning circuit; the adaptive tuning circuit is used to adjust the resonant frequency of the receiving coil X2 according to the magnetic field frequency and magnetic field strength of the transmitting coil X1, thereby achieving the best energy reception effect.

[0054] Figure 2 This is a schematic diagram of another vehicle wireless charging device provided in an embodiment of the present invention. See also... Figure 2 Optionally, based on the above embodiments, the vehicle wireless charging device may further include a first communication module 80.

[0055] The first communication module 80 is connected to the control module 10 and wirelessly connected to the second communication module 90 on the vehicle. The first communication module 80 receives the charging parameters transmitted by the second communication module 90. The control module 10 is also used to control the first voltage conversion module 50 according to the charging parameters to adjust the output power of the first voltage conversion module 50.

[0056] The second communication module 90 can employ low-power, high-speed wireless communication protocols, such as Bluetooth 5.0 or Wi-Fi Direct, to ensure the stability and reliability of data transmission. The rectifier module 60 may include a rectifier circuit and a voltage regulator circuit. The rectifier circuit can use high-efficiency rectifier diodes and advanced voltage regulator chips, which can effectively reduce losses during the power conversion process and improve charging efficiency.

[0057] The rectifier module 60 is also used to collect the current and voltage data of the output DC power, as well as its own temperature.

[0058] Specifically, the second communication module 90 is responsible for data interaction with the first communication module 80, providing real-time feedback to the first communication module 80 on information such as the charging status, battery level, and battery temperature of the power receiving terminal 600. This allows the control module 10 to adjust the charging strategy based on the feedback information, achieving intelligent charging management. The rectifier module 60 converts the high-frequency AC power induced by the receiving coil X2 into DC power, and stabilizes the DC voltage through a voltage regulator circuit, outputting a stable DC voltage to charge the vehicle battery 22.

[0059] Optionally, the vehicle wireless charging device also includes a temperature sensor, a current sensor, and a voltage sensor (not specifically shown in the figure) to monitor the temperature, voltage, and current of the transmitting coil X1, the receiving coil X2, and the battery 22 in real time, respectively.

[0060] Specifically, considering the specific structure of the vehicle wireless charging device, its working principle is as follows:

[0061] When the vehicle enters the wireless charging area, the monitoring module 20 outputs a detection signal upon detecting the vehicle's arrival. Upon receiving the detection signal, the control module 10 activates the positioning module 30 and the position adjustment module 40. The positioning module 30, through the coordinated operation of multiple positioning technologies, accurately locates the position and orientation of the power receiving module 20 on the vehicle and generates a first positioning signal, which is transmitted to the control module 10. The control module 10 then drives the position adjustment module 40 to adjust the vehicle's position based on the first positioning signal. Once the transmitting coil X1 and receiving coil X2 are aligned and a stable connection is established between the first communication module 80 and the second communication module 90, the positioning module 30 generates a second positioning signal and transmits it to the control module 10. The control module 10 then drives the first voltage conversion module 50 to operate. The first voltage conversion module 50 converts AC power into high-frequency AC power and transmits a magnetic field through the transmitting coil X1. The receiving coil X2 senses the magnetic field and converts it into electrical energy, which is then processed by the rectifier module 60 and the second voltage conversion module 70 to charge the vehicle's battery 22. Meanwhile, the second communication module 90 transmits the charging parameters (such as charging current and charging voltage) from the vehicle receiver to the first communication module 80 in real time, so that the control module 10 adjusts the power output according to these parameters to achieve constant current and constant voltage charging.

[0062] During charging, the first communication module 80 and the second communication module 90 continuously exchange data to monitor the charging status in real time. When the control module 10 determines that there is an abnormality in the charging process based on the charging parameters, such as excessively high rectifier module temperature or excessive charging current, it takes corresponding adjustment measures, such as reducing the charging power and starting the cooling fan. Furthermore, the control module 10 automatically adjusts the charging strategy based on the charging status of the battery 22. For example, when the battery 22 has a low charge level, a larger charging current is used for rapid charging; as the battery 22 approaches full charge, the charging current is gradually reduced to prevent overcharging and extend battery life.

[0063] When the vehicle battery 22 is fully charged or the user actively stops charging, the second communication module 90 sends a charging completion signal to the first communication module 80, which in turn transmits the charging completion signal to the control module 10. Upon receiving the charging completion signal, the control module 10 immediately stops power output and shuts down the positioning module 30, the position adjustment module 60, and other related functional modules. The vehicle can then safely leave the wireless charging area.

[0064] See also Figure 2 Optionally, both the transmitting coil X1 and the receiving coil X2 adopt a flat spiral coil structure.

[0065] The transmitting coil X1 can be made of a magnetic material with high permeability as a shielding layer.

[0066] Specifically, the transmitting coil X1 employs a novel flat helical coil design. By optimizing the number of turns, wire diameter, and winding method, it can generate a high-intensity, highly uniform magnetic field at a specific frequency. Compared to traditional coils, this improves magnetic field transmission efficiency. Simultaneously, the transmitting coil X1 uses a high-permeability magnetic material as a shielding layer, effectively reducing magnetic field leakage and minimizing interference with surrounding electronic equipment. The receiving coil X2 corresponds to the transmitting coil X1, employing the same flat helical coil structure, ensuring efficient coupling of the magnetic field generated by the transmitting coil X1 and its conversion into electrical energy.

[0067] The technical solution of this invention, through optimized design of the transmitting and receiving coils, the adoption of a high-efficiency first voltage conversion module, and an intelligent charging management strategy, can improve charging efficiency, reduce charging time and energy loss, enhance the energy utilization efficiency of electric vehicles, and lower user operating costs. Furthermore, the intelligent charging management strategy can automatically adjust charging parameters according to battery status, preventing overcharging and over-discharging, thus helping to extend battery life and reduce user battery replacement costs. In addition, the vehicle wireless charging device employs multiple safety protection measures, such as magnetic field shielding, overvoltage and overcurrent protection, and temperature protection, effectively preventing potential safety hazards such as leakage, short circuits, and overheating during charging, ensuring the safety of users and vehicles. Simultaneously, high-precision positioning and alignment technology ensures stable coupling between the transmitting and receiving ends, avoiding charging efficiency reduction and energy leakage due to misalignment, further improving charging safety and stability.

[0068] Optionally, vehicle wireless charging devices can be integrated with parking management systems, smart grids, etc., to achieve intelligent charging management and energy distribution, providing strong support for building an intelligent transportation and energy management system.

[0069] This invention also provides a method for wireless charging a vehicle, used to control the wireless charging device for a vehicle provided in any embodiment of this invention; therefore, this charging method has corresponding beneficial effects.

[0070] Figure 3 A flowchart of a vehicle wireless charging method provided in an embodiment of the present invention is shown below. Figure 3 Wireless charging methods for vehicles include:

[0071] S110: When a vehicle enters the wireless charging area, the monitoring module outputs a detection signal to the control module.

[0072] S120. The control module controls the positioning module to determine the position of the receiving coil according to the detection signal, and receives the first positioning signal transmitted by the positioning module. The control module controls the position adjustment module to adjust the position of the vehicle according to the first positioning signal so that the transmitting coil and the receiving coil are aligned, and receives the second positioning signal transmitted by the positioning module. The control module controls the first voltage conversion module according to the second positioning signal so that the power output from the power source is transmitted to the receiving coil on the vehicle through the transmitting coil.

[0073] Specifically, the receiving coil couples the magnetic field of the transmitting coil and converts it into electrical energy, which is then used to charge the battery through the rectifier module and the second voltage conversion module on the vehicle.

[0074] The technical solution of this invention enables precise alignment between the wireless charging device and the vehicle. Users no longer need to manually plug and unplug the charging gun; simply driving the vehicle into the wireless charging area allows the wireless charging device to automatically complete the positioning, alignment, and charging process, greatly simplifying the charging operation. This is especially suitable for use in busy public places or in inclement weather conditions, providing users with a more convenient charging experience, improving charging convenience and safety, enhancing the usability and user satisfaction of electric vehicles, and promoting the market penetration of electric vehicles. By setting up a first voltage conversion module and a second voltage conversion module, charging efficiency can be improved, reaching levels comparable to or even higher than traditional wired charging, effectively reducing charging time and energy loss, improving vehicle charging efficiency and energy utilization efficiency, and lowering user operating costs. Wireless charging avoids the wear and tear and poor contact problems caused by frequent plugging and unplugging of traditional wired charging interfaces, thereby reducing maintenance costs for charging equipment and vehicle charging interfaces and extending the lifespan of the equipment. Since wireless charging technology eliminates the need for charging cables, it avoids the clutter and safety hazards caused by charging cables in public places, making the charging area cleaner and more aesthetically pleasing, and improving the overall environmental quality.

[0075] Optionally, based on the above embodiments, the vehicle wireless charging device further includes a first communication module, which is connected to the control module and wirelessly connected to a second communication module on the vehicle; then, the wireless charging method further includes:

[0076] During the charging process, the first communication module and the second communication module exchange charging parameters in real time to monitor the charging status of the transmitting coil, receiving coil and battery; among which, the charging parameters include charging voltage, charging current, battery power and battery temperature.

[0077] Optionally, based on the above embodiments, the wireless charging method further includes:

[0078] When the charging parameters are not within the preset range, the control module outputs a first control signal, and the first voltage conversion module responds to the first control signal by reducing the output power.

[0079] In other words, the technical solution provided by the embodiments of the present invention can automatically adjust the charging parameters according to the battery status through the intelligent charging management strategy, prevent the battery from being overcharged and over-discharged, help extend the battery's service life, and reduce the cost of replacing the battery for users.

[0080] Optionally, based on the above embodiments, the wireless charging method further includes:

[0081] After charging is complete, the control module outputs a second control signal. The first voltage conversion module responds to the second control signal and stops outputting power. The control module then controls the positioning module and the position adjustment module to shut down.

[0082] This invention also provides a vehicle, which includes a receiving coil, a rectifier module, and a second voltage conversion module; the receiving coil is coupled to the transmitting coil in the vehicle wireless charging device provided in any of the above embodiments.

[0083] Figure 4 A schematic diagram of a vehicle mechanism provided in an embodiment of the present invention is shown below. Figure 4 The vehicle includes a receiving coil X2, a rectifier module 60, and a second voltage conversion module 70. The receiving coil X2 is coupled to the transmitting coil X1 in the vehicle wireless charging device provided in any of the above embodiments. The receiving coil X2 couples the magnetic field of the transmitting coil X1 and converts it into electrical energy, which is then used to charge the battery 22 through the rectifier module 60 and the second voltage conversion module 70 on the vehicle.

[0084] Optionally, the vehicle also includes a capacitor compensation module 100 connected to the receiving coil X2, the capacitor compensation module 100 being used to adjust the equivalent impedance of the receiving coil X2.

[0085] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0086] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A wireless charging device for vehicles, characterized in that, include: Control module; Power source; The transmitting coil is coupled to the receiving coil on the vehicle. A monitoring module is connected to the control module. The monitoring module outputs a detection signal to the control module when a vehicle enters the wireless charging area. The positioning module and the position adjustment module are both connected to the control module. The control module is used to control the positioning module to determine the position of the receiving coil according to the detection signal, and to receive the first positioning signal transmitted by the positioning module. The control module is also used to control the position adjustment module to adjust the position of the vehicle according to the first positioning signal so that the transmitting coil and the receiving coil are aligned, and to receive the second positioning signal transmitted by the positioning module. The first voltage conversion module is connected to the control module, the power source, and the transmitting coil. The control module is also used to control the first voltage conversion module according to the second positioning signal so that the power output by the power source is transmitted through the transmitting coil. The receiving coil couples the magnetic field of the transmitting coil and converts it into electrical energy, which is then used to charge the battery through the rectifier module and the second voltage conversion module on the vehicle.

2. The vehicle wireless charging device according to claim 1, characterized in that, The positioning module includes an ultrasonic positioning unit, a visual recognition positioning unit, an electromagnetic induction positioning unit, and a data processing unit. The ultrasonic positioning unit, the visual recognition positioning unit, and the electromagnetic induction positioning unit are all connected to the data processing unit, and the data processing unit is connected to the control module. The ultrasonic positioning unit is used to send ultrasonic signals to the area where the receiving coil is located, and to receive ultrasonic signals reflected from the area where the receiving coil is located. By the time difference between sending the ultrasonic signals and receiving the ultrasonic signals, the distance and relative position of the transmitting coil and the receiving coil are determined, and the first positioning information is transmitted to the data processing unit. The visual recognition and positioning unit is used to collect image information of the area where the receiving coil is located, and determine the center position and orientation of the receiving coil based on the internally stored image recognition algorithm, and transmit the second positioning information to the data processing unit; The electromagnetic induction positioning unit is used to determine the relative position of the transmitting coil and the receiving coil based on the change in mutual inductance between the transmitting coil and the receiving coil, and to transmit third positioning information to the data processing unit. The data processing unit is used to fuse the received first positioning information, second positioning information and third positioning information to form the first positioning signal and the second positioning signal, and transmit them to the control module.

3. The vehicle wireless charging device according to claim 1, characterized in that, Both the transmitting coil and the receiving coil adopt a flat spiral coil structure.

4. The vehicle wireless charging device according to claim 1, characterized in that, Also includes: First communication module; The first communication module is connected to the control module and wirelessly connected to the second communication module on the vehicle. The first communication module receives charging parameters transmitted by the second communication module. The control module is also used to control the first voltage conversion module according to the charging parameters to adjust the output power of the first voltage conversion module.

5. The vehicle wireless charging device according to claim 1, characterized in that, The receiving coil includes an adaptive tuning circuit; The adaptive tuning circuit is used to adjust the resonant frequency of the receiving coil according to the magnetic field frequency and magnetic field strength of the transmitting coil.

6. A method for wireless charging a vehicle, characterized in that, For controlling the vehicle wireless charging device according to any one of claims 1-5; The method includes: When a vehicle enters the wireless charging area, the monitoring module outputs a detection signal to the control module. The control module controls the positioning module to determine the position of the receiving coil according to the detection signal, and receives the first positioning signal transmitted by the positioning module. The control module controls the position adjustment module to adjust the position of the vehicle according to the first positioning signal so that the transmitting coil and the receiving coil are aligned, and receives the second positioning signal transmitted by the positioning module. The control module controls the first voltage conversion module according to the second positioning signal to transmit the power output by the power source to the receiving coil on the vehicle through the transmitting coil.

7. The vehicle wireless charging method according to claim 6, characterized in that, The vehicle wireless charging device also includes a first communication module, which is connected to the control module and wirelessly connected to a second communication module on the vehicle. The method further includes: During the charging process, the first communication module and the second communication module exchange charging parameters in real time to monitor the charging status of the transmitting coil, the receiving coil, and the battery; wherein, the charging parameters include charging voltage, charging current, battery power, and battery temperature.

8. The vehicle wireless charging method according to claim 7, characterized in that, Also includes: When the charging parameters are not within the preset range, the control module outputs a first control signal, and the first voltage conversion module responds to the first control signal by reducing the output power.

9. The vehicle wireless charging method according to claim 8, characterized in that, Also includes: After charging is completed, the control module outputs a second control signal, the first voltage conversion module responds to the second control signal and stops outputting power, and the control module controls the positioning module and the position adjustment module to shut down.

10. A vehicle, characterized in that, The vehicle includes a receiving coil, a rectifier module, and a second voltage conversion module; the receiving coil is coupled to the transmitting coil in the vehicle wireless charging device according to any one of claims 1-5; The receiving coil couples the magnetic field of the transmitting coil and converts it into electrical energy, which is then used to charge the battery through the rectifier module and the second voltage conversion module on the vehicle. The vehicle also includes a capacitor compensation module connected to the receiving coil, the capacitor compensation module being used to adjust the equivalent impedance of the receiving coil.

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