Wireless charging receiving circuit, wireless charging method and system and electronic equipment

Abstract

The invention discloses a wireless charging receiving circuit, a wireless charging method, a wireless charging system and electronic equipment. The wireless charging receiving circuit is provided with a control module to adjust output parameters corresponding to at least two wireless receiving modules and adjust the output power of a wireless charging transmitting circuit; each wireless receiving module adjusts the output parameter of the charging electric signal under the regulation and control of the control module, and outputs the adjusted charging electric signal to the voltage matching module; and the voltage matching module outputs a target charging electric signal consistent with the target charging voltage of the battery to the battery according to the adjusted charging electric signal output by each wireless receiving module. According to the application, the at least two wireless receiving modules are arranged to divide the high-power charging current into the at least two charging branches, so that the heat loss of the total charging current is reduced, the heating problem of the electronic equipment in the charging process is reduced, and the charging efficiency of the electronic equipment is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of wireless charging technology, and relate to but are not limited to a wireless charging receiving circuit, a wireless charging method, a system, and an electronic device. Background Art

[0002] With the rapid development of electronic technology, more and more electronic products are appearing on the market, and electronic products have become an indispensable part of users' lives. In order to ensure normal operation, many electronic products on the market (such as mobile phones, wearable devices, etc.) need to be charged frequently. The charging efficiency of electronic products has also become one of the key performances that users pay attention to when purchasing products. As the battery capacity of electronic products gradually increases, users have higher and higher requirements for charging time. The main demand is to reduce the charging time of the battery from low power to high power. Therefore, manufacturers have gradually begun to pursue high-power charging to reduce charging time. However, in the process of realizing high-power charging, compared with low-power charging, the current increases, the heat loss of the charging device also increases, the charging efficiency decreases, and the charging device also has the risk of overheating. How to reduce the heating of the charging device when realizing high-power charging is a problem that needs to be solved by technicians in this field. Summary of the invention

[0003] In view of this, the wireless charging receiving circuit, wireless charging method, system and electronic device provided in the embodiments of the present application can reduce the device cost of the electronic device when implementing high-power charging, reduce the heating problem of the electronic device during the charging process, and improve the charging efficiency of the electronic device.

[0004] In a first aspect, an embodiment of the present application provides a wireless charging receiving circuit, which is applied to an electronic device. The wireless charging receiving circuit includes a control module, at least two wireless receiving modules and a voltage matching module. Each wireless receiving module is connected to the control module and the voltage matching module respectively, and the voltage matching module is also connected to the battery of the electronic device, wherein: each wireless receiving module is used to receive an electromagnetic signal transmitted by a wireless charging transmitting circuit and convert the electromagnetic signal into a charging electrical signal; the control module is used to obtain an output parameter of the charging electrical signal output by each wireless receiving module, and generate a response to the wireless charging according to the output parameter corresponding to each wireless receiving module and a preset output parameter threshold. The power control instructions of the transmitting circuit are used to adjust the output power of the wireless charging transmitting circuit, and / or to adjust the output parameters of the charging electrical signal output by at least one of the at least two wireless receiving modules; each of the wireless receiving modules is also used to adjust the output parameters corresponding to the charging electrical signal according to the adjusted output parameters, and output the adjusted charging electrical signal to the voltage matching module; the voltage matching module is used to receive the adjusted charging electrical signal output by the wireless receiving module, and perform voltage matching processing on the adjusted charging electrical signal, so that the voltage of the charging electrical signal output by the voltage matching module to the battery is consistent with the target charging voltage of the battery.

[0005] In a second aspect, an embodiment of the present application provides a wireless charging method for charging a battery of an electronic device, wherein the electronic device includes at least two wireless receiving modules, and the method includes: when wireless charging is performed with a wireless charging transmitting circuit, obtaining output parameters of a charging electrical signal output by each wireless receiving module, and generating a power control instruction for the wireless charging transmitting circuit according to the output parameters corresponding to each wireless receiving module and a preset output parameter threshold, so as to adjust the output power of the wireless charging transmitting circuit, and / or, adjusting the output parameters of the charging electrical signal output by at least one wireless receiving module of the at least two wireless receiving modules; adjusting the output parameters corresponding to the charging electrical signal according to the adjusted output parameters; performing voltage matching on the charging electrical signal to generate a target charging electrical signal consistent with the target charging voltage of the battery, so as to charge the battery.

[0006] In a third aspect, an embodiment of the present application provides a wireless charging system, the wireless charging system comprising a wireless charging device and an electronic device, the wireless charging device comprising a wireless charging transmitting circuit; the electronic device comprises the wireless charging receiving circuit described in the first aspect above and a battery connected to the wireless charging receiving circuit, the wireless charging transmitting circuit is coupled to the wireless charging receiving circuit to wirelessly charge the battery of the electronic device.

[0007] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the electronic device also comprises the above-mentioned wireless charging receiving circuit and a battery, wherein the wireless charging receiving circuit is connected to the battery.

[0008] The wireless charging receiving circuit, wireless charging method, system and electronic device provided in the embodiment of the present application include a control module, at least two wireless receiving modules and a voltage matching module, each wireless receiving module is respectively connected to the control module and the voltage matching module, and the voltage matching module is also connected to the battery, wherein the control module obtains the output parameter of each wireless receiving module, and adjusts the output power of the wireless charging transmitting circuit according to the output parameter of each wireless receiving module and the preset output parameter threshold, and / or adjusts the output parameter corresponding to at least one wireless receiving module of the at least two wireless receiving modules; each wireless receiving module receives the electromagnetic signal transmitted by the wireless charging transmitting circuit, converts the electromagnetic signal into a charging electrical signal, and adjusts the parameter of the charging electrical signal according to the adjusted output parameter, and outputs the adjusted charging electrical signal to the voltage matching module; the voltage matching module outputs a target charging electrical signal consistent with the target charging voltage of the battery to the battery according to the adjusted charging electrical signal output by each wireless receiving module. Compared with the prior art, the present application sets at least two wireless receiving modules to divide the high-power charging into at least two charging branches, thereby reducing the heat loss of the overall charging current, reducing the heating problem of the electronic device during the charging process, and improving the charging efficiency of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application.

[0010] Figure 1 A schematic diagram of the structure of a wireless charging system provided in an embodiment of the present application;

[0011] Figure 2 A schematic diagram of a specific structure of a wireless charging system provided in an embodiment of the present application;

[0012] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0013] Figure 4 This is a schematic diagram of the structure of a wireless charging receiving circuit in the prior art;

[0014] Figure 5A schematic diagram of the structure of a wireless charging receiving circuit provided in an embodiment of the present application;

[0015] Figure 6 A schematic diagram of the structure of a wireless receiving module provided in an embodiment of the present application;

[0016] Figure 7 A schematic diagram of the structure of a voltage matching module provided in an embodiment of the present application;

[0017] Figure 8 A schematic diagram of the structure of a wireless receiving module disclosed in an embodiment of the present application;

[0018] Fig. 9 A schematic diagram of the implementation structure of a wireless receiving module provided in an embodiment of the present application;

[0019] Fig.10 A schematic diagram of the structure of a voltage matching module provided in an embodiment of the present application;

[0020] Fig.11 A schematic diagram of an implementation structure of a voltage matching module provided in an embodiment of the present application;

[0021] Fig.12 A schematic diagram of the structure of a voltage matching module provided in an embodiment of the present application;

[0022] Fig.13 A schematic diagram of an implementation structure of a voltage matching module provided in an embodiment of the present application;

[0023] Fig.14 A schematic diagram of the structure of a voltage matching module disclosed in an embodiment of the present application;

[0024] Fig.15 A schematic diagram of the implementation structure of a voltage matching module disclosed in an embodiment of the present application;

[0025] Fig.16 A schematic diagram of the structure of a voltage matching module disclosed in an embodiment of the present application;

[0026] Fig.17 A schematic diagram of the implementation structure of a voltage matching module disclosed in an embodiment of the present application;

[0027] Fig.18 A schematic diagram of the structure of a wireless charging system provided in an embodiment of the present application;

[0028] Fig.19 A schematic diagram of the structure of a wireless charging system provided in an embodiment of the present application;

[0029] Fig. 20 A schematic diagram of the structure of a wireless charging system provided in an embodiment of the present application;

[0030] Fig.21 A schematic diagram of a wireless charging method provided in an embodiment of the present application;

[0031] Fig. 22 A schematic diagram of a wireless charging method provided in an embodiment of the present application;

[0032] Fig.23 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0035] Figure 1 A schematic diagram of the structure of a wireless charging system provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the wireless charging system includes a wireless charging device 1 and an electronic device 2. The wireless charging device 1 includes a wireless charging transmitting circuit, and the electronic device 2 includes a wireless charging receiving circuit and a battery connected to the wireless charging receiving circuit. The wireless charging transmitting circuit is coupled to the wireless charging receiving circuit to wirelessly charge the battery of the electronic device 2.

[0036] The above-mentioned wireless charging device may also include a power supply device, which is used to provide electrical energy to the wireless charging transmitting circuit. The wireless charging transmitting circuit will generate a high-frequency alternating magnetic field after being powered on. The wireless charging receiving circuit senses the alternating magnetic field and converts the magnetic energy into electrical energy to provide to the battery of the electronic device for wireless charging. The control end in the wireless charging receiving circuit controls the conversion parameters of the electrical energy so that the electrical energy output to the battery can match the charging voltage of the battery.

[0037] For example, Figure 2 As shown, the wireless charging device 1 includes a power supply device 10 and a wireless charging transmitting circuit 30, and the electronic device 2 includes a wireless charging receiving circuit 40 and a battery 20. The wireless charging transmitting circuit 30 is connected to the power supply device 10, the wireless charging transmitting circuit 30 is coupled to the wireless charging receiving circuit 40, and the wireless charging receiving circuit 40 is connected to the battery 20.

[0038] It should be understood that after the power supply device 10 is connected to the wireless charging transmitting circuit 30, the output current of the power supply device 10 will be transmitted to the wireless charging transmitting circuit 30. The wireless charging transmitting circuit 30 can convert the output current of the power supply device 10 into an electromagnetic signal (or electromagnetic wave signal) for transmission through the internal wireless transmitting circuit. For example, the wireless transmitting circuit can convert the output current of the power supply device 10 into an alternating current, and convert the alternating current into an electromagnetic signal through a transmitting coil or a transmitting antenna. In some embodiments, the wireless charging transmitting circuit 30 is, for example, a wireless charging base.

[0039] The wireless charging receiving circuit 40 generates an induced current due to receiving the electromagnetic signal transmitted by the wireless charging transmitting circuit 30. For example, the wireless charging receiving circuit 40 can convert the electromagnetic signal transmitted by the wireless charging transmitting circuit 30 into alternating current through a receiving coil or a receiving antenna, and perform operations such as rectifying and / or filtering the alternating current, convert the alternating current into a charging electrical signal of the wireless charging receiving circuit 40, and output the charging electrical signal to the battery 20.

[0040] Optionally, the battery 20 may be included in an electronic device, which may be a terminal or a communication terminal, including but not limited to a device configured to receive / send communication signals via a wired line connection, such as via a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, a direct cable connection, and / or another data connection / network and / or via, for example, a cellular network, a wireless local area network (WLAN), a digital television network such as a handheld digital video broadcasting handheld (DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and / or a wireless interface of another communication terminal. A communication terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" and / or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal communication system (PCS) terminals that can combine cellular radio telephones with data processing, fax and data communication capabilities; personal digital assistants (PDAs) that can include radio telephones, pagers, Internet / intranet access, web browsers, notepads, calendars and / or global positioning system (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices including radio telephone transceivers. In addition, the terminal may also include, but is not limited to, rechargeable electronic devices with charging functions such as e-book readers, smart wearable devices, mobile power supplies (such as power banks, travel chargers), electronic cigarettes, wireless mice, wireless keyboards, wireless headphones, Bluetooth speakers, etc. In some embodiments, the wireless charging receiving circuit 40 and the battery 20 are integrated into the electronic device.

[0041] For example, Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 3As shown, the electronic device 21 may include a processor 210, an external memory interface 220, an internal memory 221, a universal serial bus (USB) interface 230, a wireless charging receiving circuit 40, a battery 20, an antenna 1, an antenna 2, a mobile communication module 250, a wireless communication module 260, a display screen 270 and a button 280.

[0042] It is understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the electronic device 21. In other embodiments of the present application, the electronic device 21 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0043] The processor 210 may include one or more processing units, for example: the processor 210 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and / or a neural network processor (neural-network processing unit, NPU), etc. Among them, different processing units can be independent devices or integrated into one or more processors. Exemplarily, the processor 210 can be a smart terminal CPU, such as a Snapdragon series processor, etc. In some embodiments, the processor 210 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a universal serial bus (USB) interface, etc.

[0044] It is understandable that the interface connection relationship between the modules illustrated in the embodiment of the present application is only a schematic illustration and does not constitute a structural limitation on the electronic device 21. In other embodiments of the present application, the electronic device 21 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

[0045] The wireless charging receiving circuit 40 is used to receive current from the wireless charging transmitting circuit 30. The wireless charging receiving circuit 40 is connected to the battery 20, and is used to power the processor 210, the internal memory 221, the display screen 270 and the wireless communication module 260, etc., and provide charging current to the battery 20 when receiving current from the wireless charging transmitting circuit 30. The battery 20 is, for example, a battery, a battery cell, etc.

[0046] The wireless communication function of the electronic device 21 can be implemented by antenna 1, antenna 2, mobile communication module 250, wireless communication module 260, modulation and demodulation processor and baseband processor. Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the electronic device 21 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of the antenna. For example, antenna 1 can be reused as a diversity antenna of a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0047] The mobile communication module 250 can provide solutions for wireless communications including 2G / 3G / 4G / 5G, etc., applied to the electronic device 21. The mobile communication module 250 may include at least one filter, a switch, a parameter amplifier, a low noise amplifier (LNA), etc. The mobile communication module 250 can receive electromagnetic waves from the antenna 1, and filter, amplify, etc. the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation.

[0048] The wireless communication module 260 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc., which are applied to the electronic device 21. The wireless communication module 260 can be one or more devices integrating at least one communication processing module. The wireless communication module 260 receives electromagnetic waves via the antenna 2, modulates the frequency of the electromagnetic wave signal and performs filtering, and sends the processed signal to the processor 210. The wireless communication module 260 can also receive the signal to be sent from the processor 210, modulate the frequency of the signal, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2.

[0049] In some embodiments, antenna 1 of electronic device 21 is coupled to mobile communication module 250, and antenna 2 is coupled to wireless communication module 260, so that electronic device 21 can communicate with the network and other devices through wireless communication technology.

[0050] The electronic device 21 implements the display function through a GPU, a display screen 270, and an application processor. The GPU is a microprocessor for image processing, which connects the display screen 270 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 210 may include one or more GPUs, which execute program instructions to generate or change display information. The display screen 270 is used to display images, videos, etc.

[0051] The electronic device 21 can realize the shooting function through ISP, camera, video codec, GPU, display screen 270 and application processor. ISP is used to process the data fed back by the camera. The camera is used to capture static images or videos. The object generates an optical image through the lens and projects it onto the photosensitive element. The photosensitive element can be a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP for conversion into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in a standard RGB, YUV or other format. The digital signal processor is used to process digital signals. In addition to processing digital image signals, it can also process other digital signals.

[0052] The external memory interface 220 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 21. The external memory card communicates with the processor 210 through the external memory interface 220 to implement a data storage function, such as storing music, video and other files in the external memory card.

[0053] The internal memory 221 can be used to store computer executable program codes, which include instructions. The internal memory 221 can include a program storage area and a data storage area. Among them, the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area can store data created during the use of the electronic device 21 (such as audio data, a phone book, etc.), etc.

[0054] The key 280 includes a power key, a volume key, etc. The key 280 may be a mechanical key or a touch key. The electronic device 21 may receive key input and generate key signal input related to user settings and function control of the electronic device 21.

[0055] In addition, the electronic device involved in the embodiments of the present application may also be installed with an operating system, and application programs may be installed and run on the operating system, which is not limited in the embodiments of the present application.

[0056] In the prior art, the structure of the wireless charging receiving circuit is as follows: Figure 4 As shown, the wireless charging receiving circuit includes a receiving coil Ls, a compensation capacitor Cs, a resonant capacitor Cd, a receiving end RX, an application processor AP, a buck circuit Buck and a charge pump, the compensation capacitor Cs is respectively connected to the receiving coil Ls, the resonant capacitor Cd and the receiving end RX, the resonant capacitor Cd is also connected to the receiving end RX, the receiving end RX is also respectively connected to the application processor AP, the buck circuit Buck and the charge pump, the receiving end RX includes a rectifier bridge, a main linear regulator (Main low dropout regulator, MLDO), a capacitor modulation MOS and a receiving controller. In the implementation process, after the receiving coil Ls receives energy, the rectifier bridge in the receiving end RX converts the AC power into DC power, and after filtering by the MLDO, it is output to the buck circuit Buck or charge pump at the back end to achieve voltage reduction, and then output to the battery 20. In order to achieve the wireless charging power requirement of more than 50W, when using the above current structure, it is necessary to increase the voltage and reduce the current. However, this method also requires multiple charge pump devices to be connected in parallel at the output end of the receiving end RX to reduce the heat generation of the coil and the receiving end RX, which increases the device cost. In addition, the output voltage of the receiving end RX is high, and the device has a high withstand voltage. It is difficult to reduce the switch tube impedance under the same chip size.

[0057] In order to solve the above problems, the present application provides a wireless charging receiving circuit to reduce the heating problem of electronic devices during the charging process when high-power charging is achieved, thereby improving the charging efficiency of electronic devices.

[0058] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0059] Figure 5 A schematic diagram of a wireless charging receiving circuit provided in an embodiment of the present application, wherein the wireless charging receiving circuit is applied to Figure 2 The wireless charging system shown in FIG. Figure 5 As shown, the wireless charging receiving circuit 40 may include a control module 401 , at least two wireless receiving modules 402 and a voltage matching module 403 , each wireless receiving module 402 is respectively connected to the control module 401 and the voltage matching module 403 , and the voltage matching module 403 is also connected to the battery 20 .

[0060] Each wireless receiving module 402 is used to receive the electromagnetic signal transmitted by the wireless charging transmitting circuit and convert the electromagnetic signal into a charging electrical signal;

[0061] The control module 401 is used to obtain the output parameters of the charging electrical signal output by each wireless receiving module 402, and generate a power control instruction for the wireless charging transmitting circuit according to the output parameters corresponding to each wireless receiving module 402 and a preset output parameter threshold, so as to adjust the output power of the wireless charging transmitting circuit, and / or adjust the output parameters of the charging electrical signal output by at least one wireless receiving module 402 of the at least two wireless receiving modules 402;

[0062] Furthermore, the wireless receiving module 402 is further used to adjust the output parameter corresponding to the charging electrical signal according to the adjusted output parameter, and output the adjusted charging electrical signal to the voltage matching module 403;

[0063] The voltage matching module 403 is used to receive the adjusted charging electrical signal output by the wireless receiving module 402 and perform voltage matching processing on the adjusted charging electrical signal so that the voltage of the charging electrical signal output by the voltage matching module 403 to the battery 20 is consistent with the target charging voltage of the battery 20.

[0064] It should be understood that the above output parameters include output current, output voltage, output power, etc.

[0065] Optionally, the control module 401 can obtain the output parameters of the charging electrical signal output by each wireless receiving module 402, calculate the total output parameters, and then perform power control on the wireless charging transmitting circuit 30, and / or control the output parameters corresponding to at least one of the at least two wireless receiving modules 402. For example, after the control module 401 obtains the output current corresponding to each wireless receiving module 402 and calculates the total output current, it determines a voltage control strategy or a current control strategy according to the total output current to control the output voltage or output current corresponding to at least one of the at least two wireless receiving modules 402, and it can also determine a power control strategy according to the total output current to control the power of the wireless charging transmitting circuit 30. The specific design can be as needed, and this application does not limit this.

[0066] Optionally, the output parameter corresponding to each wireless receiving module 402 can be detected by an output parameter detection submodule included in each wireless receiving module 402. After each wireless receiving module 402 reads the value of the output parameter detection unit, it sends it to the control module 401 when the control module 401 reads it. The control module 401 thus performs power control on the wireless charging transmitting circuit 30 according to each wireless receiving module 402 to adjust the transmission power, and / or controls the output parameter corresponding to at least one wireless receiving module 402 of the at least two wireless receiving modules 402 to balance the output parameter corresponding to each wireless receiving module 402.

[0067] Optionally, the output parameter detection submodule may include a current detector, a voltage detector and a power detector to detect output parameters such as output current, output voltage and output power corresponding to each wireless receiving module 402 .

[0068] Optionally, a main wireless receiving module is pre-set in the at least two wireless receiving modules 402, and the main wireless receiving module can be any one of the at least two wireless receiving modules 402. The main wireless receiving module communicates with the control module 401 at the beginning of the charging stage. At this time, the remaining wireless receiving modules 402 are in a non-working state, and only the main wireless receiving module works. With the success of the high-power handshake communication between the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40, the remaining wireless receiving modules 402 also start to work, so that the wireless charging transmitting circuit 30 transmits a high-power electromagnetic signal, and the wireless charging receiving circuit 40 receives a high-power charging current and outputs it to the battery 20, thereby completing the high-power charging of the battery 20. Among them, when starting the high-power charging process, the control module 401 will adjust the corresponding output parameters of the remaining wireless receiving modules 402 so that the output parameters corresponding to at least two wireless receiving modules 402 are maintained within a certain range, and the parameters of the voltage matching module 403 will also be adjusted to correspond to the high-power charging. After the parameters of at least two wireless receiving modules 402 and the voltage matching module 403 are all adjusted, the wireless charging transmitting circuit 30 will start to increase the transmission power to ensure charging safety.

[0069] Optionally, the control module 401 may include a communication unit and a control unit, the communication unit being connected to each wireless receiving module 402 respectively, the communication unit being used to receive the output parameters corresponding to each wireless receiving module 402, and to send interaction instructions to each wireless receiving module 402, so that each wireless receiving module 402 adjusts the output parameters of the charging electrical signal; the control unit being used to determine the power control strategy of the wireless charging transmitting circuit 30 and the output parameter control strategy corresponding to at least one of the at least two wireless receiving modules 402 according to the output parameters corresponding to each wireless receiving module 402 and a preset output parameter threshold, and to send the above control strategy to the wireless receiving module 402 through the communication unit, so that the wireless receiving module 402 forwards the power control strategy to the wireless charging transmitting circuit 30 and controls its own corresponding output parameters according to the output parameter control strategy.

[0070] For example, Figure 6 As shown, at least two wireless receiving modules 402 include a main wireless receiving module and an auxiliary wireless receiving module, each wireless receiving module 402 includes a power-on signal terminal and a communication terminal, and the communication unit of the control module 401 is respectively connected to the communication terminals of the main wireless receiving module and the auxiliary wireless receiving module, and the communication unit of the control module 401 is also connected to the power-on signal terminal of the main wireless receiving module. After the wireless charging receiving circuit 40 is powered on, the power-on signal terminal of the main wireless receiving module outputs a signal indicating that the wireless charging is powered on to the control module 401, so that the control module 401 sends a charging start instruction indicating the start of wireless charging to the main wireless receiving module to start the wireless charging process. During the wireless charging process, the communication unit of the control module 401 receives the output parameters corresponding to each wireless receiving module 402. The control unit determines the power control strategy of the wireless charging transmitting circuit 30 and the output parameter control strategy corresponding to at least one of the at least two wireless receiving modules 402 according to the output parameters corresponding to each wireless receiving module 402 and the preset output parameter threshold, and sends the above-mentioned control strategy to the wireless receiving module 402 through the communication unit, so that the wireless receiving module 402 forwards the power control strategy to the wireless charging transmitting circuit 30 and controls its own corresponding output parameters according to the output parameter control strategy.

[0071] Optionally, the charging mode of the wireless charging receiving circuit 40 may be set to a low-power charging mode and a high-power charging mode. In the low-power charging mode, the wireless charging receiving circuit 40 may adjust the parameters of the voltage matching module 403 to the first parameter to meet the low-power charging requirements of the battery 20; in the high-power charging mode, the wireless charging receiving circuit 40 adjusts the parameters of the voltage matching module 403 to the second parameter to meet the high-power charging requirements of the battery 20. In some embodiments, the execution object for adjusting the parameters of the voltage matching module 403 in the wireless charging receiving circuit 40 may be the control module 401, or may not be executed by the control module 401. The specific design may be as needed, and the present application does not limit this.

[0072] For example, Figure 7 As shown, the voltage matching module 403 may include a back-to-back isolated field effect transistor (FieldEffect Transistor, FET) and a step-down switching circuit Buck, and the input ends of the back-to-back isolated FET and Buck are respectively connected to each wireless receiving module 402. When the wireless charging receiving circuit 40 is in a low-power charging mode, only Buck in the voltage matching module 403 is in a working state to output a charging electrical signal with a charging voltage that meets the low-power charging requirement of the battery 20; when the wireless charging receiving circuit 40 is in a high-power charging mode, only the back-to-back isolated FET in the voltage matching module 403 is in a working state, that is, after the charging electrical signals output by at least two wireless receiving modules 402 are combined, a high-power charging electrical signal can be output to output a charging electrical signal with a charging voltage that meets the high-power charging requirement of the battery 20.

[0073] Optionally, the wireless charging receiving circuit 40 can perform handshake communication with the wireless charging transmitting circuit 30, and determine whether it is currently in low-power charging or high-power charging according to the handshake result between the wireless charging transmitting circuit 30. For example, when the handshake result indicates that the handshake communication is successful, it is determined that it is currently in high-power charging, and the wireless charging receiving circuit 40 sends an instruction to start the high-power charging mode to the wireless charging transmitting circuit 30, so that the wireless charging transmitting circuit 30 transmits a high-power electromagnetic signal, and adjusts the output parameters corresponding to the voltage matching module 403 to meet the high-power charging; when the handshake result indicates that the handshake communication fails, it is determined that it is currently in low-power charging, and sends an instruction to start the low-power charging mode to the wireless charging transmitting circuit 30, so that the wireless charging transmitting circuit 30 transmits a low-power electromagnetic signal, and adjusts the output parameters corresponding to the voltage matching module 403 to meet the low-power charging. In some embodiments, the handshake communication of low-power charging can be performed first, and after the handshake communication of low-power charging is successful, the handshake communication of high-power charging can be performed to improve charging safety.

[0074] Exemplarily, when both the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 are powered on and successfully coupled, the wireless charging process starts. At this time, only one of the at least two wireless receiving modules 402 is turned on. First, the wireless charging receiving circuit 40 and the wireless charging transmitting circuit 30 perform handshake communication of the low-power charging protocol. When the handshake communication of the low-power charging protocol is successful, the voltage matching module 403 is adjusted to the first parameter to meet the low-power charging requirement of the battery 20. When the handshake communication of the low-power charging protocol fails, a stop charging instruction is sent to the wireless charging transmitting circuit 30 to stop the wireless charging transmitting circuit 30 from transmitting electromagnetic signals to the wireless charging receiving circuit 40. After the handshake communication of the low-power charging protocol is successful, the handshake communication of the high-power charging protocol is performed between the wireless charging receiving circuit 40 and the wireless charging transmitting circuit 30. When the handshake communication of the high-power charging protocol is successful, the voltage matching module 403 is adjusted to the second parameter to meet the high-power charging requirement of the battery 20.

[0075] Optionally, the handshake communication can be a process of identifying each other's identities. For example, when handshake communication is performed on whether to turn on high-power charging, a successful handshake communication can indicate that the wireless charging transmitting circuit 30, the wireless charging receiving circuit 40 and the battery 20 all support the wireless charging method of high-power charging provided in the embodiment of the present invention. A failed handshake communication can indicate that at least one of the wireless charging transmitting circuit 30, the wireless charging receiving circuit 40 and the battery 20 does not support the wireless charging method of high-power charging provided in the embodiment of the present invention.

[0076] Optionally, the battery 20 may be a single battery or multiple batteries, and the multiple batteries may be connected in series or in parallel. The specific design can be as required and is not limited in the present application.

[0077] Optionally, the timing of the low-power handshake communication and the high-power handshake communication can be determined according to the charging power of the battery 20. For example, when the charging power of the battery 20 is at a low level capacity, only the main wireless receiving module works, and as the power of the battery 20 increases, when the charging voltage falls within a first preset charging voltage range, the low-power handshake communication between the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 is started, and when the charging power falls within a second preset charging power range, the high-power handshake communication between the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 is started.

[0078] Optionally, the at least two wireless receiving modules 402 may include a voltage stabilizing module and a current stabilizing module, so as to control the voltage stabilizing module to work when the control module instructs to adjust the output voltage, or control the current stabilizing module to work when the control module instructs to adjust the output current. In some embodiments, the voltage stabilizing module may be a voltage stabilizer, and the current stabilizing module may be a current stabilizer.

[0079] Preferably, the at least two wireless receiving modules 402 mentioned above can be low-power wireless receivers. Since the maximum output voltage of the low-power wireless receiver is 10V, the process withstand voltage can be reduced. Under the condition of the same chip size, the switch tube impedance can be smaller than that of a wireless receiver with an output voltage of 20V.

[0080] Preferably, the control module 401 may be an application processor, which may be a central processing unit (CPU), a digital signal processing (DSP), or a combination of the two. The specific design is based on demand and is not limited in this application.

[0081] In the above-mentioned wireless charging receiving circuit 40, by setting a control module 401, at least two wireless receiving modules 402 and a voltage matching module 403, each wireless receiving module 402 is respectively connected to the control module 401 and the voltage matching module 403, and the voltage matching module 403 is also connected to the battery 20, wherein the control module 401 obtains the output parameter corresponding to each wireless receiving module 402, and according to the output parameter corresponding to each wireless receiving module 402 and the preset output parameter threshold, the wireless charging transmitting circuit 30 is power-controlled, and / or at least two wireless receiving modules 402 are controlled. The control module 401 controls the output parameters corresponding to at least one of the wireless receiving modules 402; each wireless receiving module 402 receives the electromagnetic signal transmitted by the wireless charging transmitting circuit 30, converts the electromagnetic signal into a charging electrical signal, and, under the control of the control module 401, adjusts the output parameters of the charging electrical signal, and outputs the adjusted charging electrical signal to the voltage matching module 403; the voltage matching module 403 outputs a target charging electrical signal consistent with the target charging voltage of the battery 20 to the battery 20 according to the adjusted charging electrical signal output by each wireless receiving module 402. Compared with the prior art, the present application divides the high-power charging current into at least two charging branches by setting at least two wireless receiving modules 402, thereby reducing the heat loss of the overall charging current, reducing the heating problem of the electronic device during the charging process, and improving the charging efficiency of the electronic device.

[0082] In one embodiment, the output parameter includes an output current, and the preset output parameter threshold includes a first current threshold. The control module 401 performs power control on the wireless charging transmitting circuit 30 according to the output parameter corresponding to each wireless receiving module 402 and the preset output parameter threshold, specifically including:

[0083] The control module 401 generates a power control instruction according to the sum of the output currents corresponding to at least two wireless receiving modules 402 and the first current threshold;

[0084] The control module 401 controls the first target wireless receiving module to send a power control instruction to the wireless charging transmitting circuit 30, so that the wireless charging transmitting circuit 30 adjusts the output power according to the power control instruction. The first target wireless receiving module is one of the at least two wireless receiving modules 402.

[0085] Among them, when the sum of the output currents is greater than the first current threshold, the power control instruction is used to instruct the wireless charging transmitting circuit 30 to reduce the transmission power; when the sum of the output currents is less than the first current threshold, the power control instruction is used to instruct the wireless charging transmitting circuit 30 to increase the transmission power.

[0086] Exemplarily, the wireless charging receiving circuit 40 includes a main wireless receiving module and an auxiliary wireless receiving module. After reading the output currents corresponding to the main wireless receiving module and the auxiliary wireless receiving module, the control module 401 calculates the output current I corresponding to the main wireless receiving module. 主 The output current I corresponding to the auxiliary wireless receiving module 辅 The current and Iset=I 主 +I 辅 , and then calculate the difference between the current and Iset and the first current threshold Itarget, ΔIset=Itarget-Iset. If |ΔIset|≥set value, then determine the size of ΔIset. If ΔIset is greater than 0, the control module 401 generates a power control communication packet indicating an increase in the transmission power, and controls the first target wireless receiving module to send the power control communication packet to the wireless charging transmitting circuit 30, so that the transmission power of the wireless charging transmitting circuit 30 is increased. If ΔIset is less than 0, the control module 401 generates a power control communication packet indicating a decrease in the transmission power, and controls the first target wireless receiving module to send the power control communication packet to the wireless charging transmitting circuit 30, so that the transmission power of the wireless charging transmitting circuit 30 is reduced. If |ΔIset|<set value, no adjustment is made. The first target wireless receiving module is any one of the main wireless receiving module and the auxiliary wireless receiving module.

[0087] Optionally, the first target wireless receiving module can be a main wireless receiving module pre-set by the wireless charging receiving circuit 40. However, since the wireless receiving module 402 and the wireless charging transmitting circuit 30 can only realize information interaction when the system gain is within a certain range, it is necessary to adjust the communication parameters of the wireless charging transmitting circuit 30 by changing the system gain of the current wireless charging system, so that the adjusted wireless charging transmitting circuit 30 can realize information interaction with the main wireless receiving module. For example, the system gain is changed by changing the modulation capacitor of each wireless receiving module 402, so that the communication signal of the wireless charging transmitting circuit 30 is synchronized with the communication signal of the main wireless receiving module. Among them, only one of the at least two wireless receiving modules 402 is used as the wireless receiving module 402 that interacts with the wireless charging transmitting circuit 30, which can avoid the communication interference between the at least two wireless receiving modules 402 caused by sending data packets at the same time, thereby ensuring reliable communication.

[0088] Optionally, the first target wireless receiving module may also be determined by output parameters corresponding to at least two wireless receiving modules 402, the output parameters including output power, for example, there may be a preset relationship between at least two wireless receiving modules 402 and the sum of the output powers, and the first target wireless receiving module is determined by calculating the sum of the output powers. The specific method may be:

[0089] The control module 401 calculates the sum of the output powers corresponding to at least two wireless receiving modules 402 according to the output power corresponding to each wireless receiving module 402;

[0090] The control module 401 determines a first target wireless receiving module from at least two wireless receiving modules 402 according to the target power range in which the sum of the output powers is located.

[0091] Exemplarily, the wireless charging receiving circuit 40 includes a main wireless receiving module and an auxiliary wireless receiving module. The main wireless receiving module corresponds to the output power range of A1 to A2, and the auxiliary wireless receiving module corresponds to the output power range of B1 to B2. After calculating that the sum of the output powers corresponding to the main wireless receiving module and the auxiliary wireless receiving module is C, it is determined whether C is in the range of output power A1 to A2 or the range of output power B1 to B2. If it is in the range of output power A1 to A2, the main wireless receiving module is selected as the first target wireless receiving module; if it is in the range of output power B1 to B2, the auxiliary wireless receiving module is selected as the first target wireless receiving module.

[0092] Optionally, the preset relationship between the at least two wireless receiving modules 402 and the sum of the output powers may be characterized by specific parameters of the modulation capacitor of the wireless receiving module 402. For example, each wireless receiving module 402 includes a modulation capacitor, and the parameters of the modulation capacitor included in each wireless receiving module 402 are different. The wireless charging receiving circuit 40 may determine to select a suitable modulation capacitor according to the current corresponding output parameters, and select the corresponding wireless receiving module 402 as the first target wireless receiving module for interacting with the wireless charging transmitting circuit 30.

[0093] The control module 401 may determine the first target wireless receiving module from the at least two wireless receiving modules 402 according to the target power range in which the sum of the output powers is located by:

[0094] According to the correspondence between the preset power range and the modulation capacitor and the target power range, a target modulation capacitor is determined from the capacitors respectively included in the wireless receiving module 402, and the wireless receiving module 402 corresponding to the target modulation capacitor is the first target wireless receiving module.

[0095] Exemplarily, the wireless charging receiving circuit 40 includes a main wireless receiving module and an auxiliary wireless receiving module, the main wireless receiving module is connected to a modulation capacitor A, and the auxiliary wireless receiving module is connected to a modulation capacitor B, the capacitance of the modulation capacitor A is different from the capacitance of the modulation capacitor B, and when determining the first target wireless receiving module, the output power corresponding to the main wireless receiving module and the auxiliary wireless receiving module can be read first, and the interval in which the sum of the output powers is located can be determined. According to the interval in which the sum of the output powers is located, it is determined whether the modulation capacitor A or the modulation capacitor B is currently used. If the modulation capacitor A is used, the main wireless receiving module is used as the first target wireless receiving module; if the modulation capacitor B is used, the auxiliary wireless receiving module is used as the first target wireless receiving module.

[0096] Optionally, each wireless receiving module 402 may have multiple modulation capacitors, and the target modulation capacitor may be determined according to the correspondence between the preset power range and the modulation capacitor and the target power range, and the target modulation capacitor is one or more of the at least two modulation capacitors included in the at least two wireless receiving modules 402. Among them, each wireless receiving module 402 may use multiple modulation capacitors to achieve different modulation depths, thereby ensuring reliable communication while minimizing the impact on power transmission efficiency and stability.

[0097] Exemplarily, the wireless charging receiving circuit 40 includes a main wireless receiving module and an auxiliary wireless receiving module, the main wireless receiving module is connected to a modulation capacitor A and a modulation capacitor C, the auxiliary wireless receiving module is connected to a modulation capacitor B and a modulation capacitor D, the capacitances of the modulation capacitors A, B, C and D are different, when determining the first target wireless receiving module, firstly, the output power corresponding to the main wireless receiving module and the auxiliary wireless receiving module can be read, and the interval in which the sum of the output powers is located can be determined, and the current use of the modulation capacitor A, the modulation capacitor B, the modulation capacitor C and the modulation capacitor D can be determined according to the interval in which the sum of the output powers is located. Which one or several of the modulation capacitors D are used, wherein the communication quality between the wireless charging receiving circuit 40 and the wireless charging transmitting circuit 30 under the capacitance environment of the modulation capacitor A and the modulation capacitor B and the communication quality between the wireless charging receiving circuit 40 and the wireless charging transmitting circuit 30 under the capacitance environment of the modulation capacitor C and the modulation capacitor D are tested in advance, and according to the interval in which the sum of the output powers is located, it is determined whether the combination of the modulation capacitor A and the modulation capacitor B, the combination of the modulation capacitor C and the modulation capacitor D, or one of the modulation capacitor A, the modulation capacitor B, the modulation capacitor C and the modulation capacitor D is currently used. If the modulation capacitor A and / or the modulation capacitor C are used, the main wireless receiving module is used as the first target wireless receiving module; if the modulation capacitor B and / or the modulation capacitor D are used, the auxiliary wireless receiving module is used as the first target wireless receiving module.

[0098] In one embodiment, the output parameter includes an output current, and the preset output parameter threshold includes a second current threshold. The control module 401 regulates the output parameter corresponding to each wireless receiving module 402 according to the output parameter corresponding to each wireless receiving module 402 and the preset output parameter threshold, specifically including:

[0099] Determine at least one group of wireless receiving modules from at least two wireless receiving modules, each group of wireless receiving modules includes any two wireless receiving modules from the at least two wireless receiving modules;

[0100] Calculating the absolute value of the difference between the output currents corresponding to at least one group of wireless receiving modules;

[0101] Generate a parameter control instruction for a second target wireless receiving module according to the absolute value of the difference between the output currents corresponding to each group of wireless receiving modules and the second current threshold, wherein the second target wireless receiving module is a wireless receiving module with a larger current value in each group of wireless receiving modules;

[0102] Sending the parameter control instruction to the second target wireless receiving module, so that the second target wireless receiving module adjusts the output parameter according to the parameter control instruction;

[0103] When the absolute value of the difference between the output currents is greater than the second current threshold, the voltage control instruction indicates to reduce the output parameter corresponding to the second target wireless receiving module, and the output parameter includes the output voltage and / or the output current.

[0104] Exemplarily, when the number of wireless receiving modules is two, the wireless charging receiving circuit 40 includes a main wireless receiving module and an auxiliary wireless receiving module, that is, at this time there is only one set of wireless receiving modules, and the control module 401 calculates the output current I corresponding to the main wireless receiving module after reading the output current corresponding to the main wireless receiving module and the auxiliary wireless receiving module. 主 The output current I corresponding to the auxiliary wireless receiving module 辅 The difference ΔIequal=I 主 -I 辅 If |ΔIequal|≥the second current threshold, the size of ΔIequal is determined. If ΔIequal is greater than 0, the control module 401 controls the main wireless receiving module to reduce the output voltage or output current corresponding to the main wireless receiving module. If ΔIequal is less than 0, the control module 401 controls the auxiliary wireless receiving module to reduce the output voltage or output current corresponding to the auxiliary wireless receiving module. If |ΔIequal|<the second current threshold, there is no risk of current unevenness and no adjustment is performed.

[0105] Exemplarily, when the number of wireless receiving modules is three, the wireless charging receiving circuit 40 includes a main wireless receiving module, a first auxiliary wireless receiving module and a second auxiliary wireless receiving module, that is, there are three groups of wireless receiving modules, namely, the main wireless receiving module and the first auxiliary wireless receiving module, the first auxiliary wireless receiving module and the second auxiliary wireless receiving module, and the main wireless receiving module and the second auxiliary wireless receiving module. The process of calculating the difference in output current for each group of wireless receiving modules is consistent with the process when the number of wireless receiving modules is two. After calculating the second target wireless receiving modules in the three groups of wireless receiving modules respectively, the output voltages or output currents corresponding to the three target wireless receiving modules can be adjusted.

[0106] Among them, by generating a voltage control instruction for the second target wireless receiving module based on the difference in output currents corresponding to any two wireless receiving modules 402 and the second current threshold, the output voltage corresponding to the wireless receiving module 402 with the largest output current among any two wireless receiving modules 402 is reduced, thereby balancing the charging electrical signals output by at least two wireless receiving modules 402 to prevent triggering of over current protection (OCP).

[0107] In the existing wireless charging system, in order to protect the safe transmission of electromagnetic signals between the wireless charging transmitter and the wireless charging receiver, a foreign object recognition mechanism needs to be added to prevent foreign objects from entering between the wireless charging transmitter and the wireless charging receiver and affecting the electromagnetic signal transmission. The foreign object recognition mechanism is as follows: the wireless charging receiver sends the output power corresponding to the wireless receiving module 402 and the corresponding foreign object recognition compensation power to the wireless charging transmitter, so that the wireless charging transmitter determines the power. When the wireless charging transmitter determines that the output power corresponding to the wireless charging receiver is significantly different from the transmission power, it starts to disconnect the charging to ensure charging safety.

[0108] In one embodiment, the control module 401 is further used to control the wireless charging transmitting circuit 30 to perform foreign object recognition according to the output parameters corresponding to each wireless receiving module 402 .

[0109] In one embodiment, the control module 401 controls the wireless charging transmitting circuit 30 to perform foreign object recognition according to the output parameters corresponding to each wireless receiving module 402, specifically including:

[0110] According to the output power and foreign object recognition compensation power corresponding to each wireless receiving module 402, a foreign object recognition instruction is generated through the third target wireless receiving module, and the foreign object recognition compensation power has a mapping relationship with the output parameter;

[0111] The third target wireless receiving module is controlled to send a foreign object recognition instruction to the wireless charging transmitting circuit 30, so that the wireless charging transmitting circuit 30 performs foreign object recognition judgment according to the foreign object recognition power.

[0112] It should be understood that the foreign object recognition compensation power is related to the operating status of the wireless receiving module, and the value thereof has a mapping relationship with the output parameter corresponding to the wireless receiving module.

[0113] Among them, the above-mentioned foreign object recognition instruction is generated according to the sum of the output power corresponding to at least two wireless receiving modules 402 and the foreign object recognition compensation power. The calculation of the sum of the output power corresponding to at least two wireless receiving modules 402 and the foreign object recognition compensation power can be executed by the control module 401 or by the third target wireless receiving module. The specific setting can be made as needed and this application does not impose any restrictions.

[0114] Optionally, the third target wireless receiving module is determined by a target power range in which the sum of output powers corresponding to at least two wireless receiving modules 402 is located.

[0115] The method for determining the third target wireless receiving module may be consistent with the method for determining the first target wireless receiving module, which will not be described in detail herein.

[0116] Optionally, the method of generating the foreign object recognition instruction by the third target wireless receiving module may be:

[0117] The control module 401 obtains the output power corresponding to other wireless receiving modules 402 except the third target wireless receiving module;

[0118] The control module 401 obtains the foreign object recognition compensation power of other wireless receiving modules under the current output parameters;

[0119] The control module 401 sends the output power and foreign object recognition compensation power corresponding to other wireless receiving modules 402 to the third target wireless receiving module, so that the third target processing module calculates the sum of the output power and foreign object recognition compensation power corresponding to each wireless receiving module 402 according to the output power and foreign object recognition compensation power corresponding to each wireless receiving module 402, obtains the foreign object recognition power, and generates a foreign object recognition instruction according to the foreign object recognition power.

[0120] Exemplarily, the wireless charging receiving circuit 40 includes a main wireless receiving module and an auxiliary wireless receiving module. After determining that the main wireless receiving module is the third target processing module, the control module 401 reads the output power and foreign object recognition compensation power corresponding to the auxiliary wireless receiving module, and sends the output power and foreign object recognition compensation power corresponding to the auxiliary wireless receiving module to the main wireless receiving module. The main wireless receiving module calculates the sum of the output power and foreign object recognition compensation power corresponding to the main wireless receiving module and the auxiliary wireless receiving module, and generates a corresponding foreign object recognition instruction. The main wireless receiving module sends the foreign object recognition instruction to the wireless charging transmitting circuit 30, so that the wireless charging transmitting circuit 30 performs foreign object recognition judgment according to the foreign object recognition power corresponding to the foreign object recognition instruction.

[0121] Among them, since there are at least two wireless receiving modules 402 in the present application, it is necessary to add the output powers corresponding to the at least two wireless receiving modules 402 and the corresponding foreign object recognition compensation powers. Otherwise, the wireless charging transmitter will falsely report foreign object protection because the output power and foreign object recognition compensation power reported by the wireless receiving module 402 are only a part of the actual value, resulting in charging interruption.

[0122] In one embodiment, the control module 401 is further used to receive the interactive data packet sent by the wireless charging transmitting circuit 30 through each wireless receiving module 402, and parse the interactive data packet received by any wireless receiving module 402 to obtain the interactive information with the wireless charging transmitting circuit 30.

[0123] It should be understood that the above-mentioned interactive data packet may include any information for interaction between the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40, such as information for low-power handshake communication, information for high-power handshake communication, feedback information for adjusting the transmission power of the wireless charging transmitting circuit 30, etc.

[0124] Among them, when the interactive data packet sent by the wireless charging transmitting circuit 30 is received by each wireless receiving module 402, when the analysis of the interactive data packet sent by one of the wireless receiving modules 402 fails, the interactive data packet sent by other wireless receiving modules 402 can be used for analysis, thereby improving communication reliability and preventing communication interruption.

[0125] Figure 8 FIG. 4 is a schematic diagram of the structure of a wireless receiving module 402 disclosed in an embodiment of the present application. Figure 8 As shown, the wireless receiving module 402 may include a receiving submodule 4021 and a processing submodule 4022, and the processing submodule 4022 is connected to the receiving submodule 4021 and the voltage matching module 403 respectively, wherein:

[0126] The receiving submodule 4021 is used to receive the electromagnetic signal transmitted by the wireless charging transmitting circuit 30 and convert the electromagnetic signal into an alternating current signal;

[0127] The processing submodule 4022 is used to convert the AC electrical signal into a charging electrical signal, and adjust the output voltage of the charging electrical signal under the control of the control module 401 , and output the adjusted charging electrical signal to the voltage matching module 403 .

[0128] It should be understood that the above-mentioned AC signal is generated in response to the electromagnetic signal transmitted by the wireless charging transmitting circuit 30. In some embodiments, the receiving submodule 4021 is a receiving coil or a receiving antenna, which can be used to convert the electromagnetic signal into AC based on the electromagnetic effect after receiving the electromagnetic signal transmitted from the wireless charging transmitting circuit 30.

[0129] Optionally, the above-mentioned receiving coil may include N coils for receiving wireless energy and generating induced current, wherein the diameters and the number of turns of the N coils may be the same or different, and may be set by technical personnel in this field according to actual needs, and this application does not impose any restrictions.

[0130] Optionally, at least two receiving coils of at least two wireless receiving modules 402 may be stacked vertically and the projections of the centers of the at least two receiving coils on the reference plane may overlap. In some embodiments, the reference plane may be any horizontal plane in space. Among them, at least two receiving coils are stacked vertically and the projections of the centers on the reference plane may overlap, that is, the projection planes of at least two receiving coils in the XY direction overlap and the Z direction is close, so that the coupling coefficients with the transmitting coils are basically consistent, ensuring that the currents output by the at least two wireless receiving modules 402 are basically balanced.

[0131] Optionally, the output current corresponding to the above-mentioned processing submodule 4022 can be output in a periodic manner, and the period of the output current corresponding to the processing submodule 4022 can change with the frequency of the standard alternating current input to the wireless charging system, such as the input current of the AC power grid. For example, the frequency corresponding to the period of the output current corresponding to the processing submodule 4022 is an integer multiple or reciprocal multiple of the power grid frequency. In addition, the current waveform corresponding to the output current corresponding to the processing submodule 4022 can be composed of one or a group of pulses synchronized with the power grid. Compared with the traditional constant direct current, the periodic change of the size of the voltage / current in the form of pulsation can reduce the lithium plating phenomenon of the lithium battery, increase the service life of the battery, and is conducive to reducing the polarization effect of the battery, increasing the charging speed, and reducing the heating of the battery, thereby ensuring the safety and reliability of the battery 20 during charging.

[0132] Optionally, the processing submodule 4022 may include modules such as a rectifier bridge, MLDO, capacitor modulation MOS and RX controller. After the processing submodule 4022 is combined with the receiving coil and the capacitor to form an LC resonant cavity, when the receiving coil and the transmitting coil of the wireless charging transmitting circuit 30 form a coupling state, an alternating current can be induced when the transmitting coil transmits energy. The alternating current is rectified and filtered by the rectifier bridge of the processing submodule 4022 and then outputs a direct current to the MLDO front end. The MLDO further filters. At the same time, the processing submodule 4022 can also accurately control the output voltage by controlling the MLDO. The RX controller can communicate with the application processor AP through a communication bus (such as I2C), receive the control instructions or transparent transmission protocol packets sent by the AP, and communicate with the wireless charging transmitting circuit 30 after processing, thereby realizing the control of the transmission power of the wireless charging transmitting circuit 30. The capacitance modulation MOS is connected to the modulation capacitor. When the MOS is turned on, the modulation capacitor is connected to the load network, which can change the system gain, change the waveform of the communication signal at the wireless charging transmitting circuit 30, and regularly control the capacitance modulation MOS to wirelessly send the communication information at the processing submodule 4022 to the wireless charging transmitting circuit 30, thereby realizing information interaction. In some embodiments, the above-mentioned MLDO can be replaced with a current stabilizer to accurately control the output current corresponding to the processing submodule 4022.

[0133] For example, Fig. 9 As shown, at least two wireless receiving modules 402 include a main wireless receiving module RX and an auxiliary wireless receiving module RX. Both the main wireless receiving module RX and the auxiliary wireless receiving module RX include a receiving coil, a compensation network, a modulation capacitor, a rectifier bridge, MLDO, a capacitor modulation MOS and an RX controller. After receiving the electromagnetic signal, the receiving coil converts it into an AC signal, flows to the rectifier bridge through the compensation network, and converts it into a DC signal. The DC signal flows to the MLDO for further filtering. At this time, the RX controller can obtain the output parameters of the charging signal output by the MLDO so that the RX controller can obtain it. The RX controller can communicate with the control module 401, receive the control instruction or transparent transmission protocol packet sent by the control module 401, and communicate with the wireless charging transmitting circuit 30 after processing, so as to realize the control of the transmission power of the wireless charging transmitting circuit 30. The PG end transmits the wireless charging power-on signal, and is connected to the control module 401 to indicate the wireless charging power-on. The capacitor modulation MOS is connected to the modulation capacitor. When the MOS is turned on, the modulation capacitor is connected to the load network.

[0134] Fig.10 FIG. 4 is a schematic diagram of the structure of a voltage matching module 403 disclosed in an embodiment of the present application. Fig.10 As shown, the voltage matching module 403 may include at least one first conversion submodule 4031 and a second conversion submodule 4032, each first conversion submodule 4031 is respectively connected to the second conversion submodule 4032, each wireless receiving module 402 and the battery 20, and the second conversion submodule 4032 is also respectively connected to each wireless receiving module 402 and the battery 20, wherein:

[0135] Each first conversion submodule 4031 is used to output part or all of the at least two adjusted charging electrical signals to the battery 20 when the sum of the voltages of the at least two adjusted charging electrical signals is consistent with the target charging voltage, and the at least two adjusted charging electrical signals are the target charging electrical signals;

[0136] The second conversion submodule 4032 is used to reduce the voltage of the at least two adjusted charging electrical signals to obtain and output the target charging electrical signal to the battery 20 when the sum of the voltages of the at least two adjusted charging electrical signals is inconsistent with the target charging voltage.

[0137] It should be understood that the above-mentioned target charging voltage is the charging voltage of the battery 20 when it is in high-power charging. Since the battery 20 has different charging voltages in different charging stages, different voltage matching means need to be set for different charging stages to adapt to the different charging voltages of the battery 20. For example, in the low-power trickle charging stage, the charging voltage is smaller than that in other charging stages, and a circuit that can handle a smaller input power current can be used. As the charging process progresses, the voltage of the battery 20 gradually increases until the battery 20 enters a high-power constant current charging stage. At this time, a circuit that can handle a larger input power current is needed.

[0138] Among them, the situation where the sum of the voltages of at least two adjusted charging electrical signals is inconsistent with the target charging voltage includes a low-power charging stage, such as a trickle charging stage, when only one of the pre-set wireless receiving modules 402 is in working state, that is, at this time there is only a single-channel charging electrical signal, and the target charging voltage at this time is smaller than the output voltage of the single-channel charging electrical signal, so it is necessary to perform voltage reduction processing on the charging electrical signal at this time, that is, at this time, the at least two adjusted charging electrical signals are subjected to voltage reduction processing through the second conversion submodule 4032. When the wireless charging receiving circuit 40 enters a high-power charging stage, such as a constant current charging stage, at this time, at least two wireless receiving modules 402 are in working state, and at least two charging electrical signals can meet the charging requirements of the battery 20 in the high-power charging stage after merging, so the merged charging electrical signal is directly transmitted to the battery 20 through the first conversion submodule 4031.

[0139] During the implementation process, after the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 complete the low-power handshake communication, the voltage matching module 403 uses the second conversion submodule 4032 to reduce the voltage of the charging electrical signals output by the at least two wireless receiving modules 402. At this time, only the pre-set main wireless receiving module among the at least two wireless receiving modules 402 is in a working state. After the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 complete the high-power handshake communication and adjust the voltage difference of the charging electrical signals output by the at least two wireless receiving modules 402 to be less than the set value, the voltage matching module 403 uses the first conversion submodule 4031 to transmit the charging electrical signals output by the at least two wireless receiving modules 402.

[0140] Optionally, the number of the first conversion submodules 4031 may be consistent with the number of the wireless receiving modules 402, so as to transmit the charging electrical signals output by each wireless receiving module 402 respectively, or there may be only one, so as to transmit the combined charging electrical signals of at least two wireless receiving modules 402. The specific setting can be made as needed and is not limited in this application.

[0141] Preferably, each of the first conversion submodules 4031 is a back-to-back isolation FET, and each of the second conversion submodules 4032 is a Buck circuit.

[0142] For example, Fig.11 As shown, at least two wireless receiving modules 402 include a main wireless receiving module RX and an auxiliary wireless receiving module RX, and the voltage matching module 403 includes a main back-to-back isolation FET, an auxiliary back-to-back isolation FET and a Buck circuit. The input ends of the main back-to-back isolation FET, the auxiliary back-to-back isolation FET and the Buck circuit are respectively connected to the output ends corresponding to the main wireless receiving module RX and the auxiliary wireless receiving module RX, and the output ends of the main back-to-back isolation FET, the auxiliary back-to-back isolation FET and the Buck circuit are respectively connected to the battery 20. When the wireless charging receiving circuit 40 is in low-power charging, the main wireless receiving module RX is working, the auxiliary wireless receiving module RX is turned off, and the voltage matching module 403 uses the Buck circuit to step down the charging electrical signal output by the main wireless receiving module RX, and transmits the stepped-down charging electrical signal to the battery 20; when the wireless charging receiving circuit 40 is in high-power charging, the main wireless receiving module RX and the auxiliary wireless receiving module RX are working, and the voltage matching module 403 uses the main back-to-back isolation FET and the auxiliary back-to-back isolation FET to respectively transmit the charging electrical signal output by the main wireless receiving module RX and the charging electrical signal output by the auxiliary wireless receiving module RX to the battery 20.

[0143] Among them, the above circuit structure can be applied to each wireless receiving module 402 outputting a charging electrical signal less than 6-10V. For the target charging power of 80W, the corresponding output power of each wireless receiving module 402 in at least two wireless receiving modules 402 only needs to reach a maximum of 40W, and the root mean square current of a single channel is reduced to less than 5A. Only back-to-back isolation FETs can be used to directly charge the battery 20, thereby reducing the cost of the solution.

[0144] Fig.12 FIG. 4 is a schematic diagram of the structure of another voltage matching module 403 disclosed in an embodiment of the present application. Fig.12 As shown, the voltage matching module 403 may include at least one third conversion submodule 4033 and a fourth conversion submodule 4034, the fourth conversion submodule 4034 is respectively connected to one wireless receiving module 402 and the battery 20, and at least one third conversion submodule 4033 is respectively connected to the remaining wireless receiving modules 402 and the battery 20 in a one-to-one correspondence, wherein:

[0145] Each third conversion submodule 4033 is used to output the received adjusted charging electrical signal to the battery 20 when the voltage of the received adjusted charging electrical signal is consistent with the first preset voltage;

[0146] The fourth conversion submodule 4034 is used to adjust the voltage of the received adjusted charging electrical signal to a second preset voltage, and then obtain and output a first charging electrical signal to the battery 20;

[0147] The target charging electrical signal includes at least one adjusted charging electrical signal and a first charging electrical signal, and the sum of the values ​​of the first preset voltage and the second preset voltage is greater than the value of the target charging voltage.

[0148] It should be understood that the first preset voltage and the second preset voltage may include a plurality of first preset voltages and second preset voltages, and different first preset voltages and second preset voltages correspond to different charging stages of the battery 20 .

[0149] During the implementation process, after the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 complete the low-power handshake communication, the voltage matching module 403 uses the fourth conversion submodule 4034 to reduce the voltage of the charging electrical signal output by the wireless receiving module 402 connected to the fourth conversion submodule 4034. At this time, only the wireless receiving module 402 connected to the fourth conversion submodule 4034 among the at least two wireless receiving modules 402 is in a working state. After the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 complete the high-power handshake communication and adjust the voltage difference of the charging electrical signals output by at least two wireless receiving modules 402 to be less than the set value, the voltage matching module 403 uses the fourth conversion submodule 4034 to transmit the charging electrical signal output by the wireless receiving module 402 connected to the fourth conversion submodule 4034 and uses the third conversion submodule 4033 to transmit the charging electrical signal output by the wireless receiving module 402 connected to the third conversion submodule 4033.

[0150] Optionally, the number of the third conversion submodules 4033 may be consistent with the number of the remaining wireless receiving modules 402, so as to separately transmit the charging electrical signals output by each of the remaining wireless receiving modules 402, or there may be only one, so as to transmit the charging electrical signals output by the remaining wireless receiving modules 402 after combining. The specific setting can be made as needed, and this application does not impose any restrictions.

[0151] Preferably, each of the third conversion submodules 4033 is a back-to-back isolation field effect transistor, and each of the fourth conversion submodules 4034 is a step-down conversion circuit.

[0152] For example, Fig.13As shown, at least two wireless receiving modules 402 include a main wireless receiving module RX and an auxiliary wireless receiving module RX, and a voltage matching module 403 includes a back-to-back isolation FET and a Buck circuit. The input end of the back-to-back isolation FET is connected to the output end of the auxiliary wireless receiving module RX, and the input end of the Buck circuit is connected to the output end of the main wireless receiving module RX. The output ends of the back-to-back isolation FET and the Buck circuit are respectively connected to the battery 20. When the wireless charging receiving circuit 40 is in low-power charging, the main wireless receiving module RX works, the auxiliary wireless receiving module RX is turned off, and the voltage matching module 403 uses the Buck circuit to step down the charging electrical signal output by the main wireless receiving module RX, and transmits the stepped-down charging electrical signal to the battery 20; when the wireless charging receiving circuit 40 is in high-power charging, the main wireless receiving module RX and the auxiliary wireless receiving module RX work, and the voltage matching module 403 uses the Buck circuit to transmit the charging electrical signal output by the main wireless receiving module RX and uses the back-to-back isolation FET to transmit the charging electrical signal output by the auxiliary wireless receiving module RX to the battery 20.

[0153] Among them, in the high-power charging stage, the voltage matching module 403 can set the Buck circuit to output the charging electrical signal with a constant output power, so that the control module 401 can adjust the parameters of the auxiliary wireless receiving module RX according to the output parameters corresponding to the main wireless receiving module RX to balance the output powers corresponding to the main wireless receiving module RX and the auxiliary wireless receiving module RX.

[0154] Fig.14 FIG. 4 is a schematic diagram of the structure of another voltage matching module 403 disclosed in an embodiment of the present application. Fig.14 As shown, the voltage matching module 403 may include at least one fifth conversion submodule 4035 and a sixth conversion submodule 4036, each fifth conversion submodule 4035 is respectively connected to the sixth conversion submodule 4036, each wireless receiving module 402 and the battery 20, and the sixth conversion submodule 4036 is also respectively connected to each wireless receiving module 402 and the battery 20, wherein:

[0155] Each fifth conversion submodule 4035 is used to output part or all of the at least two charging electrical signals after voltage conversion to the battery 20 when the sum of the voltages of the at least two adjusted charging electrical signals is consistent with the third preset voltage, and the at least two charging electrical signals after voltage conversion are the target charging electrical signals;

[0156] A sixth conversion submodule 4036, configured to, when the sum of the voltages of the at least two adjusted charging electrical signals is inconsistent with the third preset voltage, perform voltage reduction processing on the at least two adjusted charging electrical signals to obtain and output a target charging electrical signal to the battery 20;

[0157] Among them, the value of the preset charging parameter is greater than the value of the target charging parameter.

[0158] It should be understood that the third preset voltage is the charging voltage of the battery 20 when it is in high-power charging. In some embodiments, the third preset voltage may include multiple third preset voltages, and different third preset voltages correspond to different charging stages of the battery 20.

[0159] During the implementation process, after the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 complete the low-power handshake communication, at this time, only the pre-set main wireless receiving module among the at least two wireless receiving modules 402 is in a working state, that is, there is only a single charging electrical signal, and the charging voltage of the battery 20 under low-power charging is less than the voltage of the single charging electrical signal, so at this time, the voltage matching module 403 uses the sixth conversion submodule 4036 to reduce the voltage of the charging electrical signal output by the main wireless receiving module; after the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 complete the high-power handshake communication and adjust the voltage difference of the charging electrical signals output by the at least two wireless receiving modules 402 to be less than the set value, the sum of the voltages of the at least two charging electrical signals is inconsistent with the charging voltage of the battery 20 under high-power charging, and the input power at this time is relatively large, so at this time, the voltage matching module 403 uses at least one fifth conversion submodule 4035 to perform voltage conversion processing on the charging electrical signals output by the at least two wireless receiving modules 402, and outputs at least two charging electrical signals after voltage conversion processing to the battery 20.

[0160] Optionally, the number of the fifth conversion submodule 4035 can be consistent with the number of at least two wireless receiving modules 402, so as to transmit the charging electrical signal output by each wireless receiving module 402 respectively, or there can be only one, so as to transmit the charging electrical signal output after combining at least two wireless receiving modules 402. The specific setting can be made as needed, and this application does not impose any restrictions.

[0161] Preferably, the fifth conversion submodule 4035 is a charge pump, and the sixth conversion submodule 4036 is a step-down conversion circuit.

[0162] For example, Fig.15As shown, at least two wireless receiving modules 402 include a main wireless receiving module RX and an auxiliary wireless receiving module RX, and the voltage matching module 403 includes a main charge pump, an auxiliary charge pump and a Buck circuit. The input ends of the main charge pump, the auxiliary charge pump and the Buck circuit are respectively connected to the output ends of the main wireless receiving module RX and the auxiliary wireless receiving module RX, and the output ends of the main charge pump, the auxiliary charge pump and the Buck circuit are respectively connected to the battery 20. When the wireless charging receiving circuit 40 is in low-power charging, the main wireless receiving module RX works, the auxiliary wireless receiving module RX is turned off, and the voltage matching module 403 uses the Buck circuit to step down the charging electrical signal output by the main wireless receiving module RX and transmits the stepped-down charging electrical signal to the battery 20; when the wireless charging receiving circuit 40 is in high-power charging, the main wireless receiving module RX and the auxiliary wireless receiving module RX work, and the voltage matching module 403 uses the main charge pump and the auxiliary charge pump to respectively transmit the charging electrical signal output by the main wireless receiving module RX and the charging electrical signal output by the auxiliary wireless receiving module RX to the battery 20.

[0163] Among them, the above-mentioned circuit structure can be applicable to each wireless receiving module 402 outputting a charging electrical signal less than 6-10V, charging a single-cell battery 20 after the voltage is reduced by a first-level charge pump, or each wireless receiving module 402 outputting a charging electrical signal less than 12~20V, charging a single-cell battery 20 through a 4:1 charge pump, or charging a dual-cell battery 20 through a 2:1 charge pump.

[0164] Fig.16 FIG. 4 is a schematic diagram of the structure of another voltage matching module 403 disclosed in an embodiment of the present application. Fig.16 As shown, the voltage matching module 403 may include at least one seventh conversion submodule and an eighth conversion submodule, the eighth conversion submodule is connected to one wireless receiving module 402 and the battery 20 respectively, and at least one seventh conversion submodule is connected to the remaining wireless receiving modules 402 and the battery 20 respectively, wherein:

[0165] Each seventh conversion submodule is used for, when the voltage of the received adjusted charging electrical signal is consistent with the fourth preset voltage, performing voltage conversion processing on each adjusted charging electrical signal, and outputting part or all of at least two charging electrical signals after voltage conversion processing to the battery 20;

[0166] an eighth conversion submodule, configured to adjust the voltage of the received adjusted charging electrical signal to a fifth preset voltage, and then obtain and output a second charging electrical signal to the battery 20;

[0167] The target charging electrical signal includes at least one charging electrical signal after voltage conversion and a second charging electrical signal.

[0168] It should be understood that the fourth preset voltage and the fifth preset voltage may include a plurality of fourth preset voltages and fifth preset voltages, and different fourth preset voltages and fifth preset voltages correspond to different charging stages of the battery 20 .

[0169] During the implementation process, after the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 complete the low-power handshake communication, the voltage matching module 403 uses the eighth conversion submodule to reduce the voltage of the charging electrical signal output by the wireless receiving module 402 connected to the eighth conversion submodule. At this time, only the wireless receiving module 402 connected to the eighth conversion submodule among the at least two wireless receiving modules 402 is in a working state. After the wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 complete the high-power handshake communication and adjust the voltage difference of the charging electrical signals output by at least two wireless receiving modules 402 to be less than the set value, the voltage matching module 403 uses the eighth conversion submodule to perform voltage conversion processing on the charging electrical signal output by the wireless receiving module 402 connected to the eighth conversion submodule and then transmits it to the battery 20, and uses the seventh conversion submodule to reduce the voltage of the charging electrical signal output by the wireless receiving module 402 connected to the seventh conversion submodule and then transmits it to the battery 20.

[0170] Optionally, the number of the seventh conversion submodules may be consistent with the number of the remaining wireless receiving modules 402, so as to separately transmit the charging electrical signals output by each of the remaining wireless receiving modules 402, or there may be only one, so as to transmit the combined charging electrical signals of the remaining wireless receiving modules 402. The specific setting can be made as needed, and this application does not impose any restrictions.

[0171] Preferably, the seventh conversion submodule is a charge pump, and the eighth conversion submodule is a step-down conversion circuit.

[0172] For example, Fig.17As shown, at least two wireless receiving modules 402 include a main wireless receiving module RX and an auxiliary wireless receiving module RX, and a voltage matching module 403 includes a charge pump and a Buck circuit. The input end of the charge pump is connected to the output end of the auxiliary wireless receiving module RX, and the input end of the Buck circuit is connected to the output end of the main wireless receiving module RX. The output ends of the charge pump and the Buck circuit are respectively connected to the battery 20. When the wireless charging receiving circuit 40 is in low-power charging, the main wireless receiving module RX works, the auxiliary wireless receiving module RX is turned off, and the voltage matching module 403 uses the Buck circuit to step down the charging electrical signal output by the main wireless receiving module RX, and transmits the stepped-down charging electrical signal to the battery 20; when the wireless charging receiving circuit 40 is in high-power charging, the main wireless receiving module RX and the auxiliary wireless receiving module RX work, and the voltage matching module 403 uses the Buck circuit to step down the charging electrical signal output by the main wireless receiving module RX and transmits it to the battery 20, and uses the charge pump to step down or step up the charging electrical signal output by the auxiliary wireless receiving module RX and transmits it to the battery 20.

[0173] Among them, in the high-power charging stage, the voltage matching module 403 can set the Buck circuit to output the charging electrical signal with a constant output power, so that the control module 401 can adjust the parameters of the charge pump or the parameters of the auxiliary wireless receiving module RX according to the output parameters corresponding to the main wireless receiving module RX to balance the output powers corresponding to the main wireless receiving module RX and the auxiliary wireless receiving module RX.

[0174] Fig.18 Schematic diagram of the structure of a wireless charging system disclosed in an embodiment of the present application. Fig.18As shown, the wireless charging system may include a wireless charging transmitting circuit 30, a wireless charging receiving circuit 40 and a battery 20. The wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 are coupled and connected, and the wireless charging receiving circuit 40 and the battery 20 are connected. The wireless charging transmitting circuit 30 includes a buck-boost module, a transmitting rectifier bridge and a transmitting coil. The wireless charging receiving circuit 40 includes a receiving coil A, a receiving coil B, a main receiver RX, an auxiliary receiver RX, a main back-to-back isolation FET, an auxiliary back-to-back isolation FET and a Buck circuit. After receiving the direct current from the power supply device, the buck-boost module of the wireless charging transmitting circuit 30 performs a boost / buck process on the direct current, and outputs it to the transmitting rectifier bridge for rectification, and outputs the alternating current to the transmitting coil. The transmitting coil transmits the electromagnetic signal to the receiving coil A and the receiving coil B respectively. After receiving the electromagnetic signal, the receiving coil A and the receiving coil B convert the electromagnetic signal into an AC signal, which is output to the receiving rectifier bridges of the main receiver RX and the auxiliary receiver RX respectively, so as to convert the AC signal into a DC signal. When the wireless charging system is in low-power charging, only the main receiver RX is turned on, the Buck circuit is turned on, the main back-to-back isolation FET and the auxiliary back-to-back isolation FET are turned off, and the charging signal output by the main receiver RX only flows through the Buck circuit to output a low-power signal to charge the battery 20; when the wireless charging system is in high-power charging, the Buck circuit is turned off, and the auxiliary receiver RX is turned on on the basis of turning on the main receiver RX, the main back-to-back isolation FET and the auxiliary back-to-back isolation FET are turned on, and two currents flow through the main back-to-back isolation FET and the auxiliary back-to-back isolation FET respectively to output a high-power signal to charge the battery 20. In this embodiment, the wireless charging transmitting circuit 30 outputs a high-power electrical signal of 80W. When it is transmitted to each receiving coil, each receiving coil only receives an electrical signal of 40W power. Therefore, the root mean square current of the single-channel receiving receiver RX is reduced to 5A, and the heat loss of the two channels is reduced to half of the 80W solution of a single receiver RX. It is possible to avoid using a charge pump, thereby reducing the cost of the solution.

[0175] Fig.19 FIG. 1 is a schematic diagram of the structure of another wireless charging system disclosed in an embodiment of the present application. Fig.19As shown, the wireless charging system may include a wireless charging transmitting circuit 30, a wireless charging receiving circuit 40 and a battery 20. The wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 are coupled and connected, and the wireless charging receiving circuit 40 and the battery 20 are connected. The wireless charging transmitting circuit 30 includes a buck-boost module, a transmitting rectifier bridge and a transmitting coil. The wireless charging receiving circuit 40 includes a receiving coil A, a receiving coil B, a main receiver RX, an auxiliary receiver RX, a main charge pump, an auxiliary charge pump and a Buck circuit. After receiving the direct current from the power supply device, the buck-boost module of the wireless charging transmitting circuit 30 performs a boost / buck process on the direct current, and outputs it to the transmitting rectifier bridge for rectification, and outputs the alternating current to the transmitting coil. The transmitting coil transmits the electromagnetic signal to the receiving coil A and the receiving coil B respectively. After receiving the electromagnetic signal, the receiving coil A and the receiving coil B convert the electromagnetic signal into an AC signal, which is output to the receiving rectifier bridges of the main receiver RX and the auxiliary receiver RX respectively, so as to convert the AC signal into a DC signal. When the wireless charging system is in low-power charging, only the main receiver RX is turned on, the Buck circuit is turned on, the main charge pump and the auxiliary charge pump are turned off, and the current at the main receiver RX only flows through the Buck circuit to output a low-power signal to charge the battery 20; when the wireless charging system is in high-power charging, the Buck circuit is turned off, and the auxiliary receiver RX is turned on on the basis of turning on the main receiver RX, the main charge pump and the auxiliary charge pump are turned on, and the two currents only flow through the main charge pump and the auxiliary charge pump respectively to output a high-power signal to charge the battery 20. In this embodiment, each receiver RX can output a charging signal of 6 to 10 V, which is used to charge a single-cell battery 20 after being stepped down by a first-level charge pump. Alternatively, each receiver RX can output a charging signal of 12 to 20 V, which is used to charge a single-cell battery 20 through a 4:1 charge pump, or a dual-cell battery 20 through a 2:1 charge pump.

[0176] Fig. 20 FIG. 1 is a schematic diagram of the structure of another wireless charging system disclosed in an embodiment of the present application. Fig. 20As shown, the wireless charging system may include a wireless charging transmitting circuit 30, a wireless charging receiving circuit 40 and a battery 20. The wireless charging transmitting circuit 30 and the wireless charging receiving circuit 40 are coupled and connected, and the wireless charging receiving circuit 40 and the battery 20 are connected. The wireless charging transmitting circuit 30 includes a buck-boost module, a transmitting rectifier bridge and a transmitting coil. The wireless charging receiving circuit 40 includes a receiving coil A, a receiving coil B, a main receiver RX, an auxiliary receiver RX, a back-to-back isolation FET and a Buck circuit. After receiving the DC power from the power supply device, the buck-boost module of the wireless charging transmitting circuit 30 performs a boost / buck process on the DC power, and outputs it to the transmitting rectifier bridge for rectification, and outputs AC power to the transmitting coil. The transmitting coil transmits the electromagnetic signal to the receiving coil A and the receiving coil B respectively. After receiving the electromagnetic signal, the receiving coil A and the receiving coil B convert the electromagnetic signal into an AC signal, which is output to the receiving rectifier bridges of the main receiver RX and the auxiliary receiver RX respectively, so as to convert the AC signal into a DC signal. When the wireless charging system is in low-power charging, only the main receiver RX is turned on, the Buck circuit is turned on, and the back-to-back isolation FET is turned off. The current output by the main receiver RX only flows through the Buck circuit to output a low-power signal to charge the battery 20. When the wireless charging system is in high-power charging, the auxiliary receiver RX is turned on again, and the back-to-back isolation FET is turned on on the basis of the Buck circuit being turned on. Two currents flow through the back-to-back isolation FET and the Buck circuit respectively to output a high-power signal to charge the battery 20. In this embodiment, the Buck circuit can be set to a constant output power, and the AP can achieve the balance of the output power corresponding to the main receiver RX and the auxiliary receiver RX by controlling the output parameters corresponding to the auxiliary receiver RX.

[0177] Fig.21 Schematic diagram of a wireless charging method disclosed in an embodiment of the present application. Fig.21 As shown, the wireless charging method is applied to the wireless charging receiving circuit 40 in any one of the above embodiments, and the method may include:

[0178] Step S101, when performing wireless charging, obtain the output parameters of the charging electrical signal output by each wireless receiving module 402, and generate a power control instruction for the wireless charging transmitting circuit according to the output parameters corresponding to each wireless receiving module 402 and the preset output parameter threshold, so as to adjust the output power of the wireless charging transmitting circuit 30, and / or adjust the output parameters of the charging electrical signal output by at least one wireless receiving module among the at least two wireless receiving modules 402.

[0179] Step S102: adjusting the output parameter corresponding to the charging electrical signal according to the adjusted output parameter.

[0180] Step S103 , performing voltage matching on the charging electrical signal to generate a target charging electrical signal consistent with the target charging voltage of the battery 20 , and charging the battery 20 .

[0181] In one embodiment, the output parameter includes an output current, and the preset output parameter threshold includes a first current threshold. According to the output parameter of each wireless receiving module 402 and the preset output parameter threshold, a power control instruction for the wireless charging transmitting circuit is generated to adjust the output power of the wireless charging transmitting circuit 30, including:

[0182] Generate a power control instruction according to the sum of the output currents corresponding to at least two wireless receiving modules 402 and the first current threshold;

[0183] Controlling the first target wireless receiving module to send a power control instruction to the wireless charging transmitting circuit 30, so as to adjust the output power of the wireless charging transmitting circuit 30 according to the power control instruction, wherein the first target wireless receiving module is one of the at least two wireless receiving modules 402;

[0184] Among them, when the sum of the output currents is greater than the first current threshold, the power control instruction is used to instruct the wireless charging transmitting circuit 30 to reduce the transmission power; when the sum of the output currents is less than the first current threshold, the power control instruction is used to instruct the wireless charging transmitting circuit 30 to increase the transmission power.

[0185] In one embodiment, the output parameter includes output power, and controlling the first target wireless receiving module to send a power control instruction to the wireless charging transmitting circuit 30 includes:

[0186] The sum of the output powers corresponding to at least two wireless receiving modules 402 is calculated according to the output power corresponding to each wireless receiving module 402;

[0187] A first target wireless receiving module is determined from the at least two wireless receiving modules 402 according to the target power range in which the sum of the output powers is located.

[0188] In one embodiment, each wireless receiving module 402 includes a modulation capacitor, and determining a first target wireless receiving module from at least two wireless receiving modules 402 according to a target power range in which the sum of the output powers is located includes:

[0189] The target modulation capacitor is determined according to the correspondence between the preset power range and the modulation capacitor and the target power range. The target modulation capacitor is one of the at least two modulation capacitors included in the at least two wireless receiving modules 402. The first target wireless receiving module is the wireless receiving module 402 including the target modulation capacitor.

[0190] In one embodiment, the output parameter includes an output current, and the preset output parameter threshold includes a second current threshold. According to the output parameter corresponding to each wireless receiving module 402 and the preset output parameter threshold, the output parameter of the charging electrical signal output by at least one wireless receiving module of the at least two wireless receiving modules 402 is adjusted, including:

[0191] Determine at least one group of wireless receiving modules from the at least two wireless receiving modules 402, each group of wireless receiving modules including any two wireless receiving modules from the at least two wireless receiving modules;

[0192] Calculating the absolute value of the difference between the output currents corresponding to at least one group of wireless receiving modules 402;

[0193] Generate a voltage control instruction for a second target wireless receiving module according to the absolute value of the difference in output current corresponding to each group of wireless receiving modules and the second current threshold, the second target wireless receiving module being a wireless receiving module 402 with a larger output current in each group of wireless receiving modules;

[0194] Sending the parameter control instruction to the second target wireless receiving module, so that the second target wireless receiving module adjusts the corresponding output parameter according to the parameter control instruction;

[0195] When the absolute value of the difference between the output currents is greater than the second current threshold, the parameter control instruction indicates to reduce the output parameter corresponding to the second target wireless receiving module.

[0196] In one embodiment, the method further comprises:

[0197] The wireless charging transmitting circuit 30 is controlled to perform foreign object recognition according to the output parameters corresponding to each wireless receiving module 402 .

[0198] In one embodiment, controlling the wireless charging transmitting circuit 30 to identify foreign objects according to the output parameters corresponding to each wireless receiving module 402 includes:

[0199] According to the output power and foreign object recognition compensation power corresponding to each wireless receiving module 402, a foreign object recognition instruction is generated through a third target wireless receiving module, and the foreign object recognition compensation power has a mapping relationship with the output parameter;

[0200] The third target wireless receiving module is controlled to send a foreign object recognition instruction to the wireless charging transmitting circuit 30, so that the wireless charging transmitting circuit 30 performs foreign object recognition judgment according to the foreign object recognition instruction. The third target wireless receiving module is determined by the target power range in which the sum of the output powers corresponding to at least two wireless receiving modules is located.

[0201] In one embodiment, according to the output power and foreign object recognition compensation power corresponding to each wireless receiving module 402, a foreign object recognition instruction is generated by a third target wireless receiving module, including:

[0202] Obtaining output powers corresponding to other wireless receiving modules 402 except the third target wireless receiving module;

[0203] Obtaining the foreign object recognition compensation power corresponding to other wireless receiving modules 402 under the current output parameters;

[0204] The output power and foreign object recognition compensation power corresponding to other wireless receiving modules 402 are sent to the third target wireless receiving module, so that the third target processing module calculates the sum of the output power and foreign object recognition compensation power corresponding to each wireless receiving module 402 according to the output power and foreign object recognition compensation power corresponding to each wireless receiving module 402, obtains the foreign object recognition power, and generates a foreign object recognition instruction according to the foreign object recognition power.

[0205] In one embodiment, the voltage matching module 403 includes at least one first conversion submodule 4031 and a second conversion submodule 4032, each first conversion submodule 4031 is respectively connected to the second conversion submodule 4032, each wireless receiving module 402 and the battery 20, and the second conversion submodule 4032 is also respectively connected to each wireless receiving module 402 and the battery 20, wherein:

[0206] When the sum of the voltages of the at least two adjusted charging electrical signals is consistent with the target charging voltage, each first conversion submodule 4031 outputs part or all of the at least two adjusted charging electrical signals to the battery 20, and the at least two adjusted charging electrical signals are the target charging electrical signals;

[0207] When the sum of the voltages of the at least two adjusted charging electrical signals is inconsistent with the target charging voltage, the second conversion submodule 4032 performs voltage reduction processing on the at least two adjusted charging electrical signals to obtain and output the target charging electrical signal to the battery 20 .

[0208] In one embodiment, the voltage matching module 403 includes at least one third conversion submodule 4033 and a fourth conversion submodule 4034, the fourth conversion submodule 4034 is connected to one wireless receiving module 402 and the battery 20 respectively, and at least one third conversion submodule 4033 is connected to the remaining wireless receiving modules 402 and the battery 20 respectively, wherein:

[0209] Each third conversion submodule 4033 outputs the received adjusted charging electrical signal to the battery 20 when the voltage of the received adjusted charging electrical signal is consistent with the first preset voltage;

[0210] The fourth conversion submodule 4034 adjusts the voltage of the received adjusted charging electrical signal to a second preset voltage, thereby obtaining and outputting a first charging electrical signal to the battery 20;

[0211] The target charging electrical signal includes at least one adjusted charging electrical signal and a first charging electrical signal, and the sum of the values ​​of the first preset voltage and the second preset voltage is greater than the value of the target charging voltage.

[0212] In one embodiment, the voltage matching module 403 includes at least one fifth conversion submodule 4035 and a sixth conversion submodule 4036, each fifth conversion submodule 4035 is respectively connected to the sixth conversion submodule 4036, each wireless receiving module 402 and the battery 20, and the sixth conversion submodule 4036 is also respectively connected to each wireless receiving module 402 and the battery 20, wherein:

[0213] When the sum of the voltages of at least two adjusted charging electrical signals is consistent with the third preset voltage, each fifth conversion submodule 4035 performs voltage conversion processing on each adjusted charging electrical signal, and outputs part or all of the at least two voltage-converted charging electrical signals to the battery 20, and the at least two voltage-converted charging electrical signals are target charging electrical signals;

[0214] When the sum of the voltages of the at least two adjusted charging electrical signals is inconsistent with the third preset voltage, the sixth conversion submodule 4036 performs voltage reduction processing on the at least two adjusted charging electrical signals to obtain and output a target charging electrical signal to the battery 20;

[0215] The value of the preset charging voltage is greater than the value of the target charging voltage.

[0216] In one embodiment, the voltage matching module 403 includes at least one seventh conversion submodule 4037 and an eighth conversion submodule 4038, the eighth conversion submodule 4038 is connected to one wireless receiving module 402 and the battery 20 respectively, and at least one seventh conversion submodule 4037 is connected to the remaining wireless receiving modules 402 and the battery 20 respectively, wherein:

[0217] When the voltage of the received adjusted charging electrical signal is consistent with the fourth preset voltage, each seventh conversion submodule 4037 performs voltage conversion processing on each adjusted charging electrical signal, and outputs part or all of at least two charging electrical signals after voltage conversion processing to the battery 20;

[0218] The eighth conversion submodule 4038 adjusts the voltage of the received adjusted charging electrical signal to a fifth preset voltage, and then obtains and outputs a second charging electrical signal to the battery 20;

[0219] The target charging electrical signal includes at least one charging electrical signal after voltage conversion and a second charging electrical signal.

[0220] In one embodiment, the method further comprises:

[0221] Each wireless receiving module 402 receives the interactive data packet sent by the wireless charging transmitting circuit 30 , and the interactive data packet received by any wireless receiving module 402 is parsed to obtain the interactive information with the wireless charging transmitting circuit 30 .

[0222] Fig. 22 Schematic diagram of a wireless charging method disclosed in an embodiment of the present application. Fig. 22 As shown, the wireless charging method can be applied to Fig.19 In the circuit shown, the method may include the following steps:

[0223] 1. The application processor AP receives the power-on signal from the main receiver RX;

[0224] 2. The application processor AP controls the workflow of opening the main receiver RX and keeps the auxiliary receiver RX closed;

[0225] 3. The wireless charging transmitting circuit and the wireless charging receiving circuit perform a low-power charging protocol handshake. After the low-power charging protocol handshake is successful, the Buck circuit is used for charging. At this time, the main charge pump and the auxiliary charge pump are in the off state;

[0226] 4. The wireless charging transmitting circuit and the wireless charging receiving circuit perform a high-power charging protocol handshake. After the high-power charging protocol handshake is successful, the application processor AP controls the auxiliary receiver RX to start;

[0227] 5. When the output power of the charging electrical signal output by the main receiver RX and the auxiliary receiver RX reaches a first set value, the application processor AP adjusts the output voltage of the charging electrical signal output by the auxiliary receiver RX so that the output voltage difference between the main receiver RX and the auxiliary receiver RX is less than a threshold value;

[0228] 6. When the output power corresponding to the main receiver RX and the auxiliary receiver RX reaches the second set value, the application processor AP controls the main charge pump and the auxiliary charge pump to start, and controls the wireless charging transmitting circuit to continue to increase the transmitting power to the target value;

[0229] 7. The application processor AP reads the output power corresponding to the main receiver RX and the auxiliary receiver RX, and determines the interval in which the sum of the powers is located;

[0230] 8. Determine whether to use the modulation capacitor of the main receiver RX or the modulation capacitor of the auxiliary receiver RX according to the interval in which the sum of the powers is located. If it is determined to use the modulation capacitor of the main receiver RX, execute steps 9-10; if it is determined to use the modulation capacitor of the auxiliary receiver RX, execute steps 11-12;

[0231] 9. When it is determined to use the modulation capacitor of the main receiver RX, the application processor AP reads the output power and foreign object recognition power compensation value corresponding to the auxiliary receiver RX, and sends the output power and foreign object recognition power compensation value corresponding to the auxiliary receiver RX to the main receiver RX;

[0232] 10. The main receiver RX calculates the sum of the output power corresponding to the main receiver RX and the auxiliary receiver RX and the foreign object recognition power compensation value, and sends it to the wireless charging transmitting circuit, so that the wireless charging transmitting circuit performs foreign object determination according to the sum of the output power corresponding to the main receiver RX and the auxiliary receiver RX and the foreign object recognition power compensation value;

[0233] 11. When it is determined to use the modulation capacitor of the auxiliary receiver RX, the application processor AP reads the output power and foreign object recognition power compensation value corresponding to the main receiver RX, and sends the output power and foreign object recognition power compensation value corresponding to the main receiver RX to the auxiliary receiver RX;

[0234] 12. The auxiliary receiver RX calculates the sum of the output power corresponding to the main receiver RX and the auxiliary receiver RX and the foreign object recognition power compensation value, and sends it to the wireless charging transmitting circuit, so that the wireless charging transmitting circuit performs foreign object determination according to the sum of the output power corresponding to the main receiver RX and the auxiliary receiver RX and the foreign object recognition power compensation value;

[0235] 13. The application processor AP reads the output current corresponding to the main receiver RX and the auxiliary receiver RX, and calculates the sum of the currents;

[0236] 14. The application processor AP calculates the difference ΔIset=Itarget between the sum of the output currents corresponding to the main receiver RX and the auxiliary receiver RX and the target value Itarget-(main receiver RX output current+auxiliary receiver RX output current);

[0237] 15. The application processor AP determines whether |ΔIset|≥threshold 1. If not, no adjustment is made. If so, steps 16-17 are executed.

[0238] 16. If ΔIset>0, the application processor AP generates a power control communication packet to increase the transmission power of the wireless charging transmission circuit TX; if ΔIset<0, the application processor AP generates a power control communication packet to reduce the transmission power of the wireless charging transmission circuit TX;

[0239] 17. Determine whether to use the modulation capacitor of the main receiver RX or the modulation capacitor of the auxiliary receiver RX at this time. If the modulation capacitor of the main receiver RX is used at this time, the power control communication packet is sent by the main receiver RX. If it is determined to use the modulation capacitor of the auxiliary receiver RX, the power control communication packet is sent by the auxiliary receiver RX.

[0240] 18. The application processor AP reads the output current corresponding to the main receiver RX and the auxiliary receiver RX;

[0241] 19. The application processor AP calculates the difference ΔIequal between the output currents of the main receiver RX and the auxiliary receiver RX = the output current of the main receiver RX - the output current of the auxiliary receiver RX;

[0242] 20. The application processor AP determines whether |ΔIequal|≥threshold 2. If not, no adjustment is made. If so, step 21 is executed.

[0243] 21. If ΔIequal>0, the application processor AP controls the output voltage corresponding to the main receiver RX to decrease through the communication bus; if ΔIequal<0, the application processor AP controls the output voltage corresponding to the auxiliary receiver RX to decrease through the communication bus;

[0244] 22. The main receiver RX and the auxiliary receiver RX simultaneously monitor the communication packets sent by the wireless charging transmitting circuit TX, and the application processor AP reads the communication packets and parses the content. When the communication content parsing of one channel RX fails, the parsed content of the other channel is used.

[0245] It should be noted that the above steps 9-12, steps 13-17, steps 18-21 and step 22 can be executed in a preset order or in parallel. The specific settings are based on needs and this application does not impose any restrictions.

[0246] Fig.23 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Fig.23 As shown, the electronic device may include at least one processor, at least one memory connected to the processor in communication, a wireless charging receiving circuit 40 and a battery 20, wherein: the memory stores program instructions executable by the processor, and the wireless charging receiving circuit 40 is connected to the battery 20. The battery 20 supplies power to the at least one processor and the at least one memory connected to the processor in communication, and the wireless charging receiving circuit 40 provides charging current to the battery 20.

[0247] Through the description of the above implementation methods, technical users in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the circuit can be divided into different functional modules, or the above-mentioned functions can be assigned to the same functional module, that is, the internal structure of the circuit can be integrated into a functional module to complete all or part of the functions described above.

[0248] It should be noted here that the description of the above method, storage medium and device embodiments is similar to the description of the above circuit embodiment, and has similar beneficial effects as the circuit embodiment. For technical details not disclosed in the method, storage medium and device embodiments of this application, please refer to the description of the circuit embodiment of this application for understanding.

[0249] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0250] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0251] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0252] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0253] It should be understood that "one embodiment" or "an embodiment" or "some embodiments" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in one embodiment" or "in some embodiments" appearing throughout the specification may not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above description of each embodiment tends to emphasize the differences between the various embodiments, and the same or similar aspects can be referenced to each other. For the sake of brevity, this article will not repeat them.

[0254] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there may be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0255] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless charging receiving circuit, characterized in that: Applied to electronic devices, the wireless charging receiving circuit includes a control module, at least two wireless receiving modules and a voltage matching module, each wireless receiving module is connected to the control module and the voltage matching module respectively, and the voltage matching module is also connected to the battery of the electronic device, wherein: Each of the wireless receiving modules is used to receive the electromagnetic signal transmitted by the wireless charging transmitting circuit and convert the electromagnetic signal into a charging electrical signal; The control module is used to obtain the output parameters of the charging electrical signal output by each wireless receiving module, and generate a power control instruction for the wireless charging transmitting circuit according to the output parameters corresponding to each wireless receiving module and a preset output parameter threshold, so as to adjust the output power of the wireless charging transmitting circuit, and / or adjust the output parameters of the charging electrical signal output by at least one wireless receiving module among the at least two wireless receiving modules; Each of the wireless receiving modules is further used to adjust the output parameter corresponding to the charging electrical signal according to the adjusted output parameter, and output the adjusted charging electrical signal to the voltage matching module; The voltage matching module is used to receive the adjusted charging electrical signal output by the wireless receiving module and perform voltage matching processing on the adjusted charging electrical signal so that the voltage of the charging electrical signal output by the voltage matching module to the battery is consistent with the target charging voltage of the battery.

2. The wireless charging receiving circuit according to claim 1, characterized in that: The output parameter includes an output current, the preset output parameter threshold includes a first current threshold, and the control module generates a power control instruction for the wireless charging transmitting circuit according to the output parameter corresponding to each wireless receiving module and the preset output parameter threshold to adjust the output power of the wireless charging transmitting circuit, specifically including: generating a power control instruction according to the sum of the output currents corresponding to the at least two wireless receiving modules and the first current threshold; Controlling a first target wireless receiving module to send the power control instruction to the wireless charging transmitting circuit, so that the wireless charging transmitting circuit adjusts the output power according to the power control instruction, wherein the first target wireless receiving module is one of the at least two wireless receiving modules; Wherein, when the sum of the output currents is greater than the first current threshold, the power control instruction is used to instruct the wireless charging transmitting circuit to reduce the transmission power; When the sum of the output currents is less than the first current threshold, the power control instruction is used to instruct the wireless charging transmitting circuit to increase the transmission power.

3. The wireless charging receiving circuit according to claim 2, characterized in that: The output parameter includes output power, and the controlling the first target wireless receiving module to send the power control instruction to the wireless charging transmitting circuit specifically includes: The sum of the output powers corresponding to the at least two wireless receiving modules is calculated according to the output power corresponding to each wireless receiving module; The first target wireless receiving module is determined from the at least two wireless receiving modules according to a power range in which the sum of the output powers is located.

4. The wireless charging receiving circuit according to claim 3, characterized in that: Each of the wireless receiving modules includes a modulation capacitor, and determining the first target wireless receiving module from the at least two wireless receiving modules according to the target power range in which the sum of the output powers is located specifically includes: According to the correspondence between the preset power range and the modulation capacitor and the target power range, a target modulation capacitor is determined from the capacitors respectively included in the wireless receiving modules, and the wireless receiving module corresponding to the target modulation capacitor is the first target wireless receiving module.

5. The wireless charging receiving circuit according to claim 2, wherein: The output parameter includes an output current, the preset output parameter threshold includes a second current threshold, and the output parameter of the charging electrical signal output by at least one of the at least two wireless receiving modules is adjusted according to the output parameter corresponding to each wireless receiving module and the preset output parameter threshold, specifically including: Determine at least one group of wireless receiving modules from the at least two wireless receiving modules, each group of wireless receiving modules includes any two wireless receiving modules from the at least two wireless receiving modules; Calculating the absolute value of the difference between the output currents corresponding to the at least one group of wireless receiving modules; Generate a parameter control instruction for a second target wireless receiving module according to the absolute value of the difference in the output current corresponding to each group of wireless receiving modules and the second current threshold, wherein the second target wireless receiving module is a wireless receiving module with a larger current value in each group of wireless receiving modules; Sending the parameter control instruction to the second target wireless receiving module, so that the second target wireless receiving module adjusts the corresponding output parameter according to the parameter control instruction; Wherein, when the absolute value of the difference between the output currents is greater than the second current threshold, the parameter control instruction instructs to reduce the output parameter corresponding to the second target wireless receiving module.

6. The wireless charging receiving circuit according to claim 1, characterized in that: The control module is further used to control the wireless charging transmitting circuit to perform foreign object recognition according to the output parameters corresponding to each wireless receiving module.

7. The wireless charging receiving circuit according to claim 6, characterized in that: The control module controls the wireless charging transmitting circuit to perform foreign object recognition according to the output parameters corresponding to each wireless receiving module, specifically including: Generate a foreign object recognition instruction through a third target wireless receiving module according to the output power and foreign object recognition compensation power corresponding to each wireless receiving module, wherein the foreign object recognition compensation power has a mapping relationship with the output parameter; The third target wireless receiving module is controlled to send the foreign object recognition instruction to the wireless charging transmitting circuit, so that the wireless charging transmitting circuit performs foreign object recognition judgment according to the foreign object recognition instruction, and the third target wireless receiving module is determined by the target power range in which the sum of the output powers corresponding to the at least two wireless receiving modules is located.

8. The wireless charging receiving circuit according to claim 7, characterized in that: The generating a foreign object recognition instruction through the third target wireless receiving module according to the output power corresponding to each wireless receiving module and the foreign object recognition compensation power specifically includes: Obtaining output powers corresponding to other wireless receiving modules except the third target wireless receiving module; Obtaining the foreign object recognition compensation power corresponding to the other wireless receiving modules under the current output parameters; The output power and foreign object recognition compensation power corresponding to the other wireless receiving modules are sent to the third target wireless receiving module, so that the third target processing module calculates the sum of the output power and foreign object recognition compensation power corresponding to each wireless receiving module according to the output power and foreign object recognition compensation power corresponding to each wireless receiving module, obtains the foreign object recognition power, and generates the foreign object recognition instruction according to the foreign object recognition power.

9. The wireless charging receiving circuit according to any one of claims 1 to 8, characterized in that: Each of the wireless receiving modules includes a receiving submodule and a processing submodule, and the processing submodule is connected to the receiving submodule and the voltage matching module respectively, wherein: The receiving submodule is used to receive the electromagnetic signal transmitted by the wireless charging transmitting circuit and convert the electromagnetic signal into an alternating current signal; The processing submodule is used to convert the AC electrical signal into a charging electrical signal, adjust the output voltage of the charging electrical signal under the control of the control module, and output the adjusted charging electrical signal to the voltage matching module.

10. The wireless charging receiving circuit according to claim 9, characterized in that: The receiving submodule is a receiving coil, the at least two receiving coils of the at least two wireless receiving modules are stacked vertically, and the projections of the centers of the at least two receiving coils on the reference plane overlap.

11. The wireless charging receiving circuit according to any one of claims 1 to 10, characterized in that: The voltage matching module includes at least one first conversion submodule and a second conversion submodule, each first conversion submodule is respectively connected to the second conversion submodule, each wireless receiving module and the battery, and the second conversion submodule is also respectively connected to each wireless receiving module and the battery, wherein: Each of the first conversion submodules is configured to output part or all of the at least two adjusted charging electrical signals to the battery when the sum of the voltages of the at least two adjusted charging electrical signals is consistent with the target charging voltage, and the at least two adjusted charging electrical signals are the target charging electrical signals; The second conversion submodule is used to reduce the voltage of the at least two adjusted charging electrical signals to obtain and output the target charging electrical signal to the battery when the sum of the voltages of the at least two adjusted charging electrical signals is inconsistent with the target charging voltage.

12. The wireless charging receiving circuit according to claim 11, characterized in that: Each of the first conversion submodules is a back-to-back isolation field effect transistor, and each of the second conversion submodules is a step-down conversion circuit.

13. The wireless charging receiving circuit according to any one of claims 1 to 10, characterized in that: The voltage matching module includes at least one third conversion submodule and a fourth conversion submodule, the fourth conversion submodule is respectively connected to a wireless receiving module and the battery, and the at least one third conversion submodule is respectively connected to the remaining wireless receiving modules and the battery in a one-to-one correspondence, wherein: Each of the third conversion submodules is used to output the received adjusted charging electrical signal to the battery when the voltage of the received adjusted charging electrical signal is consistent with the first preset voltage; The fourth conversion submodule is used to adjust the voltage of the received adjusted charging electrical signal to a second preset voltage, thereby obtaining and outputting a first charging electrical signal to the battery; The target charging electrical signal includes the at least one adjusted charging electrical signal and the first charging electrical signal, and the sum of the values ​​of the first preset voltage and the second preset voltage is greater than the value of the target charging voltage.

14. The wireless charging receiving circuit according to claim 13, wherein: Each of the third conversion submodules is a back-to-back isolation field effect transistor, and each of the fourth conversion submodules is a step-down conversion circuit.

15. The wireless charging receiving circuit according to any one of claims 1 to 10, characterized in that: The voltage matching module includes at least one fifth conversion submodule and a sixth conversion submodule, each of the fifth conversion submodules is respectively connected to the sixth conversion submodule, each of the wireless receiving modules and the battery, and the sixth conversion submodule is also respectively connected to each of the wireless receiving modules and the battery, wherein: Each of the fifth conversion submodules is used to, when the sum of the voltages of the at least two adjusted charging electrical signals is consistent with a third preset voltage, perform voltage conversion processing on each of the adjusted charging electrical signals, and then output part or all of the at least two charging electrical signals after voltage conversion processing to the battery, wherein the at least two charging electrical signals after voltage conversion processing are the target charging electrical signals; The sixth conversion submodule is configured to, when the sum of the voltages of the at least two adjusted charging electrical signals is inconsistent with the third preset voltage, perform voltage reduction processing on the at least two adjusted charging electrical signals to obtain and output the target charging electrical signal to the battery; The value of the preset charging voltage is greater than the value of the target charging voltage.

16. The wireless charging receiving circuit according to claim 15, characterized in that: The fifth conversion submodule is a charge pump, and the sixth conversion submodule is a step-down conversion circuit.

17. The wireless charging receiving circuit according to any one of claims 1 to 10, characterized in that: The voltage matching module includes at least one seventh conversion submodule and an eighth conversion submodule, the eighth conversion submodule is respectively connected to a wireless receiving module and the battery, and the at least one seventh conversion submodule is respectively connected to the remaining wireless receiving modules and the battery in a one-to-one correspondence, wherein: Each seventh conversion submodule is used for, when the parameters of the received adjusted charging electrical signals are consistent with the fourth preset parameters, performing voltage conversion processing on each of the adjusted charging electrical signals, and outputting part or all of at least two charging electrical signals after voltage conversion processing to the battery; The eighth conversion submodule is configured to adjust the parameters of the received adjusted charging electrical signal to fifth preset parameters, thereby obtaining and outputting a second charging electrical signal to the battery; The target charging electrical signal includes the at least one charging electrical signal after voltage conversion and the second charging electrical signal.

18. The wireless charging receiving circuit according to claim 17, wherein: The seventh conversion submodule is a charge pump, and the eighth conversion submodule is a step-down conversion circuit.

19. The wireless charging receiving circuit according to claim 1, wherein: The control module is also used for: The interactive data packet sent by the wireless charging transmitting circuit is received by each wireless receiving module, and the interactive data packet received by any wireless receiving module is parsed to obtain interactive information with the wireless charging transmitting circuit.

20. A wireless charging method, characterized in that: For charging a battery of an electronic device, the electronic device comprising at least two wireless receiving modules, the method comprising: In the case of wireless charging with the wireless charging transmitting circuit, the output parameters of the charging electrical signal output by each wireless receiving module are obtained, and according to the output parameters corresponding to each wireless receiving module and the preset output parameter threshold, a power control instruction for the wireless charging transmitting circuit is generated to adjust the output power of the wireless charging transmitting circuit, and / or the output parameters of the charging electrical signal output by at least one wireless receiving module of the at least two wireless receiving modules are adjusted; adjusting the output parameter corresponding to the charging electrical signal according to the adjusted output parameter; The charging electrical signal is voltage matched to generate a target charging electrical signal consistent with the target charging voltage of the battery, and the battery is charged.

21. The wireless charging method according to claim 20, wherein: The output parameter includes an output current, the preset output parameter threshold includes a first current threshold, and the generating of a power control instruction for the wireless charging transmitting circuit according to the output parameter corresponding to each wireless receiving module and the preset output parameter threshold to adjust the output power of the wireless charging transmitting circuit includes: generating a power control instruction according to the sum of the output currents corresponding to the at least two wireless receiving modules and the first current threshold; Controlling a first target wireless receiving module to send the power control instruction to the wireless charging transmitting circuit, so that the wireless charging transmitting circuit adjusts the output power according to the power control instruction, wherein the first target wireless receiving module is one of the at least two wireless receiving modules; Among them, when the sum of the output currents is greater than the first current threshold, the power control instruction is used to instruct the wireless charging transmitting circuit to reduce the transmission power; when the sum of the output currents is less than the first current threshold, the power control instruction is used to instruct the wireless charging transmitting circuit to increase the transmission power.

22. The wireless charging method according to claim 21, wherein: The output parameter includes output power, and the controlling the first target wireless receiving module to send the power control instruction to the wireless charging transmitting circuit includes: The sum of the output powers corresponding to the at least two wireless receiving modules is calculated according to the output power corresponding to each wireless receiving module; The first target wireless receiving module is determined from the at least two wireless receiving modules according to the target power range in which the sum of the output powers is located.

23. The wireless charging method according to claim 22, wherein: Each of the wireless receiving modules includes a modulation capacitor, and determining the first target wireless receiving module from the at least two wireless receiving modules according to the target power range in which the sum of the output powers is located includes: According to the correspondence between the preset power range and the modulation capacitor and the target power range, a target modulation capacitor is determined from the capacitors respectively included in the wireless receiving modules, and the wireless receiving module corresponding to the target modulation capacitor is the first target wireless receiving module.

24. The wireless charging method according to claim 21, wherein: The output parameter includes an output current, the preset output parameter threshold includes a second current threshold, and the output parameter of the charging electrical signal output by at least one of the at least two wireless receiving modules is adjusted according to the output parameter corresponding to each wireless receiving module and the preset output parameter threshold, including: Determine at least one group of wireless receiving modules from the at least two wireless receiving modules, each group of wireless receiving modules includes any two wireless receiving modules from the at least two wireless receiving modules; Calculating the absolute value of the difference between the output currents corresponding to the at least one group of wireless receiving modules; Generate a parameter control instruction for a second target wireless receiving module according to the absolute value of the difference in the output current corresponding to each group of wireless receiving modules and the second current threshold, wherein the second target wireless receiving module is a wireless receiving module with a larger current value in each group of wireless receiving modules; Sending the parameter control instruction to the second target wireless receiving module, so that the second target wireless receiving module adjusts the corresponding output parameter according to the parameter control instruction; Wherein, when the absolute value of the difference between the output currents is greater than the second current threshold, the parameter control instruction instructs to reduce the output parameter corresponding to the second target wireless receiving module.

25. The wireless charging method according to claim 20, wherein: The method further comprises: The wireless charging transmitting circuit is controlled to perform foreign object recognition according to the output parameters corresponding to each wireless receiving module.

26. The wireless charging method according to claim 25, characterized in that: The controlling the wireless charging transmitting circuit to perform foreign object recognition according to the output parameters corresponding to each wireless receiving module includes: Generate a foreign object recognition instruction through a third target wireless receiving module according to the output power and foreign object recognition compensation power corresponding to each wireless receiving module, wherein the foreign object recognition compensation power has a mapping relationship with the output parameter; The third target wireless receiving module is controlled to send the foreign object recognition instruction to the wireless charging transmitting circuit, so that the wireless charging transmitting circuit performs foreign object recognition judgment according to the foreign object recognition instruction, and the third target wireless receiving module is determined by the target power range in which the sum of the output powers corresponding to the at least two wireless receiving modules is located.

27. The wireless charging method according to claim 26, wherein: The generating a foreign object recognition instruction through the third target wireless receiving module according to the output power corresponding to each wireless receiving module and the foreign object recognition compensation power includes: Obtaining output powers corresponding to other wireless receiving modules except the third target wireless receiving module; Obtaining the foreign object recognition compensation power corresponding to the other wireless receiving modules under the current output parameters; The output power and foreign object recognition compensation power corresponding to the other wireless receiving modules are sent to the third target wireless receiving module, so that the third target processing module calculates the sum of the output power and foreign object recognition compensation power corresponding to each wireless receiving module according to the output power and foreign object recognition compensation power corresponding to each wireless receiving module, obtains the foreign object recognition power, and generates the foreign object recognition instruction according to the foreign object recognition power.

28. A wireless charging system, characterized in that: The wireless charging system includes a wireless charging device and an electronic device, the wireless charging device includes a wireless charging transmitting circuit; the electronic device includes the wireless charging receiving circuit according to any one of claims 1 to 19 and a battery connected to the wireless charging receiving circuit, and the wireless charging transmitting circuit is coupled to the wireless charging receiving circuit to wirelessly charge the battery of the electronic device.

29. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, characterized in that: The electronic device further comprises a battery and the wireless charging receiving circuit according to any one of claims 1 to 19, and the wireless charging receiving circuit is connected to the battery.

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