Transmitter, receiver, power supply device and wireless charging method

Abstract

Provided are a transmitting device, a receiving device, a power supply device, and a wireless charging method. The transmitting device includes: a wireless transmitting circuit for transmitting a wireless charging signal; a communication control circuit for receiving a first feedback signal from a receiving device and sending a second feedback signal to a power supply device based on the first feedback signal; wherein the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit, and the second feedback signal is used to trigger the power supply device to adjust the output voltage and / or output current of the power supply device. In the above technical solution, the transmitting device can control the output voltage and / or output current of the power supply device based on the feedback of the output current of the wireless receiving circuit, thereby controlling the output current of the wireless receiving circuit and thus controlling the heat generated by the wireless receiving circuit.

Description

Technical Field

[0001] The present application relates to the field of wireless charging, and more specifically, to a transmitting device, a receiving device, a power supply device, and a wireless charging method. Background Art

[0002] Currently, in the field of charging technology, devices to be charged are mainly charged using a wired charging method.

[0003] Taking mobile phones as an example, currently, the main charging method for mobile phones is still wired charging. Specifically, when charging a mobile phone, the mobile phone is connected to a power supply device via a charging cable (such as a universal serial bus (USB) cable). The power output of the power supply device is transmitted to the mobile phone through the charging cable to charge the battery in the mobile phone.

[0004] For charging devices, wired charging requires the use of charging cables, making the charging preparation phase cumbersome. Therefore, wireless charging is becoming increasingly popular. However, traditional wireless charging methods are ineffective and urgently need improvement. Summary of the Invention

[0005] The present application provides a transmitting device, a receiving device, a power supply device and a wireless charging method, which can improve the charging effect of the wireless charging method.

[0006] In a first aspect, a receiving device is provided, comprising: a wireless transmitting circuit for transmitting a wireless charging signal; a communication control circuit for receiving a first feedback signal from the receiving device and sending a second feedback signal to a power supply device based on the first feedback signal; wherein the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit, and the second feedback signal is used to trigger the power supply device to adjust the output voltage and / or output current of the power supply device.

[0007] In a second aspect, a receiving device is provided, comprising: a wireless receiving circuit for receiving a wireless charging signal from a transmitting device and generating an output current of the wireless receiving circuit based on the wireless charging signal; a communication control circuit for detecting the output current of the wireless receiving circuit and sending a first feedback signal to the transmitting device, wherein the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit, and the first feedback signal is used to trigger the transmitting device to adjust the voltage and / or current corresponding to the transmission power of the wireless charging signal.

[0008] In a third aspect, a power supply device is provided, comprising: a communication control circuit for receiving a second feedback signal from a transmitting device, and adjusting the output voltage and / or output current of the power supply device according to the second feedback signal; wherein the second feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit.

[0009] In a fourth aspect, a wireless charging method is provided, comprising: transmitting a wireless charging signal; receiving a first feedback signal from a receiving device, and sending a second feedback signal to a power supply device based on the first feedback signal; wherein the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit, and the second feedback signal is used to trigger the power supply device to adjust the output voltage and / or output current of the power supply device.

[0010] In a fifth aspect, a wireless charging method is provided, including: receiving a wireless charging signal from a transmitting device; generating an output current of a wireless receiving circuit based on the wireless charging signal; detecting the output current of the wireless receiving circuit, and sending a first feedback signal to the transmitting device, wherein the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit, and the first feedback signal is used to trigger the transmitting device to adjust the voltage and / or current corresponding to the transmission power of the wireless charging signal.

[0011] In a sixth aspect, a wireless charging method is provided, comprising: receiving a second feedback signal from a transmitting device; adjusting the output voltage and / or output current of a power supply device according to the second feedback signal, wherein the second feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit.

[0012] The technical solution provided in this application can adaptively adjust the transmission power of the wireless charging signal according to the output current of the wireless receiving circuit, thereby controlling the output current of the wireless receiving circuit and achieving the purpose of controlling the heat generated by the wireless receiving circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a traditional wireless charging system.

[0014] Figure 2 This is a schematic structural diagram of a wireless charging system provided by an embodiment of the present application.

[0015] Figure 3 This is a schematic structural diagram of a wireless charging system provided in another embodiment of the present application.

[0016] Figure 4 It is a schematic structural diagram of a wireless charging signal receiving device provided in another embodiment of the present application.

[0017] Figure 5 This is a schematic flow chart of a wireless charging method provided in an embodiment of the present application.

[0018] Figure 6 This is a schematic flow chart of another wireless charging method provided in an embodiment of the present application.

[0019] Figure 7 This is a schematic flow chart of another wireless charging method provided in an embodiment of the present application. Specific embodiments

[0020] Traditional wireless charging technology generally connects a power supply device (such as an adapter) to a wireless charging device (such as a wireless charging base), and transmits the output power of the power supply device to the device to be charged wirelessly (such as electromagnetic waves) through the wireless charging device, thereby wirelessly charging the device to be charged.

[0021] Wireless charging methods are primarily categorized by their principles: magnetic coupling (or electromagnetic induction), magnetic resonance, and radio waves. Currently, mainstream wireless charging standards include Qi, the Power Matters Alliance (PMA), and the Alliance for Wireless Power (A4WP). Both Qi and PMA utilize magnetic coupling for wireless charging, while the A4WP utilizes magnetic resonance.

[0022] The following combination Figure 1 , a wireless charging method according to an embodiment is introduced.

[0023] like Figure 1 As shown, the wireless charging system includes a power supply device 110, a wireless charging apparatus 120 and a device to be charged 130, wherein the wireless charging apparatus 120 may be, for example, a wireless charging base, and the device to be charged 130 may be, for example, a terminal.

[0024] After the power supply device 110 is connected to the wireless charging apparatus 120 , the output voltage and output current of the power supply device 110 are transmitted to the wireless charging apparatus 120 .

[0025] The wireless charging device 120 can convert the output voltage and output current of the power supply device 110 into a wireless charging signal (electromagnetic signal) for transmission through the internal wireless transmission circuit 121. For example, the wireless transmission circuit 121 can convert the output current of the power supply device 110 into alternating current (AC) and convert the AC into a wireless charging signal through a transmitting coil or transmitting antenna.

[0026] Figure 1The schematic structural diagram of the wireless charging system is provided for illustrative purposes only, but the embodiments of the present application are not limited thereto. For example, the wireless charging device 120 may also be a wireless charging signal transmitter, and the device to be charged 130 may also be a wireless charging signal receiver. The wireless charging signal receiver may be, for example, a chip with a wireless charging signal receiving function that can receive the wireless charging signal transmitted by the wireless charging device 120; the wireless charging signal receiver may also be the device to be charged.

[0027] The device to be charged includes, but is not limited to, a device configured to receive / send communication signals via a wired connection (e.g., 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 a wireless interface (e.g., for a cellular network, a wireless local area network (WLAN), a digital television network such as a digital video broadcasting handheld (DVB-H) network, a satellite network, an amplitude modulation-frequency modulation (AM-FM) broadcast transmitter, and / or another communication terminal). A terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," a "wireless terminal," and / or a "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 palmtop receivers or other electronic devices that include radiotelephone transceivers. In some embodiments, the device to be charged may refer to a mobile terminal device or a handheld terminal device, such as a mobile phone, pad, etc. In some embodiments, the device to be charged mentioned in the embodiments of the present application may refer to a chip system, in which case the battery of the device to be charged may or may not belong to the chip system.

[0028] The following description is made by taking a wireless charging device and a device to be charged as an example.

[0029] The device to be charged 130 can receive the wireless charging signal transmitted by the wireless transmitting circuit 121 via the wireless receiving circuit 131 and convert the wireless charging signal into the output voltage and output current of the wireless receiving circuit 131. For example, the wireless receiving circuit 131 can convert the wireless charging signal transmitted by the wireless transmitting circuit 121 into alternating current (AC) via a receiving coil or a receiving antenna, and perform operations such as rectifying and / or filtering the AC to convert the AC into the output voltage and output current of the wireless receiving circuit 131.

[0030] In some embodiments, before wireless charging begins, the wireless charging apparatus 120 may pre-negotiate the transmit power of the wireless transmitting circuit 121 with the device to be charged 130. Assuming the negotiated power between the wireless charging apparatus 120 and the device to be charged 130 is 5W, the output voltage and output current of the wireless receiving circuit 131 are typically 5V and 1A. Assuming the negotiated power between the wireless charging apparatus 120 and the device to be charged 130 is 10.8W, the output voltage and output current of the wireless receiving circuit 131 are typically 9V and 1.2A.

[0031] If the output voltage of the wireless receiving circuit 131 is not suitable for being directly loaded onto both ends of the battery 133, it must first be subjected to constant voltage and / or constant current control by the conversion circuit 132 within the device to be charged 130 to obtain the expected charging voltage and / or charging current of the battery 133 within the device to be charged 130.

[0032] The conversion circuit 132 may be used to convert the output voltage of the wireless receiving circuit 131 so that the output voltage and / or output current of the conversion circuit 132 meet the expected charging voltage and / or charging current requirements of the battery 133 .

[0033] As an example, the conversion circuit 132 can be, for example, a charging integrated circuit (IC) or a power management circuit. During the charging process of the battery 133, the conversion circuit 132 can be used to manage the charging voltage and / or charging current of the battery 133. The conversion circuit 132 can include a voltage feedback function and / or a current feedback function to achieve management of the charging voltage and / or charging current of the battery 133.

[0034] In some embodiments, the battery charging process may include one or more of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage. In the trickle charging stage, the conversion circuit 132 may utilize a current feedback function to ensure that the current entering the battery 133 during the trickle charging stage meets the expected charging current size of the battery 133 (e.g., a first charging current). In the constant current charging stage, the conversion circuit 132 may utilize a current feedback function to ensure that the current entering the battery 133 during the constant current charging stage meets the expected charging current size of the battery 133 (e.g., a second charging current, which may be greater than the first charging current). In the constant voltage charging stage, the conversion circuit 132 may utilize a voltage feedback function to ensure that the voltage loaded onto both ends of the battery 133 during the constant voltage charging stage meets the expected charging voltage size of the battery 133.

[0035] As an example, when the output voltage of the wireless receiving circuit 131 is greater than the expected charging voltage of the battery 133, the conversion circuit 132 may be used to step down the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the step-down conversion meets the expected charging voltage requirement of the battery 133. As another example, when the output voltage of the wireless receiving circuit 131 is less than the expected charging voltage of the battery 133, the conversion circuit 132 may be used to step up the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the step-up conversion meets the expected charging voltage requirement of the battery 133.

[0036] As another example, taking the wireless receiving circuit 131 outputting a constant voltage of 5V as an example, when the battery 133 includes a single battery cell, the conversion circuit 132 (for example, a Buck step-down circuit) can step down the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the step-down meets the expected charging voltage requirement of the battery 133.

[0037] As another example, taking the wireless receiving circuit 131 outputting a constant voltage of 5V as an example, when the battery 133 includes two or more battery cells connected in series, the conversion circuit 132 (such as a Boost circuit) can boost the output voltage of the wireless receiving circuit 131 so that the charging voltage obtained after the boost meets the expected charging voltage requirement of the battery 133.

[0038] The conversion circuit 132 is limited by the low power conversion efficiency (also known as energy conversion efficiency, or circuit conversion efficiency), which causes the unconverted part of the electrical energy to be dissipated in the form of heat. This part of the heat will be focused inside the device to be charged 130. The design space and heat dissipation space of the device to be charged 130 are very small (for example, the physical size of the mobile terminals used by users is getting thinner and lighter, and a large number of electronic components are densely arranged in the mobile terminals to improve the performance of the mobile terminals). This not only increases the design difficulty of the conversion circuit 132, but also makes it difficult to remove the heat focused in the device to be charged 130 in time, thereby causing abnormalities in the device to be charged 130.

[0039] For example, the heat accumulated on the conversion circuit 132 may cause thermal interference to electronic components near the conversion circuit 132, causing abnormal operation of the electronic components. For another example, the heat accumulated on the conversion circuit 132 may shorten the service life of the conversion circuit 132 and nearby electronic components. For another example, the heat accumulated on the conversion circuit 132 may cause thermal interference to the battery 133, thereby causing abnormal charging and discharging of the battery 133. For another example, the heat accumulated on the conversion circuit 132 may cause the temperature of the device to be charged 130 to increase, affecting the user's experience during charging. For another example, the heat accumulated on the conversion circuit 132 may cause the conversion circuit 132 itself to short-circuit, causing the output voltage of the wireless receiving circuit 131 to be directly loaded across the battery 133, causing abnormal charging. If the battery 133 is in an overvoltage charging state for a long time, it may even cause the battery 133 to explode, endangering the safety of the user.

[0040] Generally speaking, the greater the voltage difference between the input voltage and output voltage of the conversion circuit 132, the lower its step-down conversion efficiency and the more severe the heat generation. The use of a high-voltage wireless signal transmission method will inevitably lead to a large voltage difference between the input voltage and output voltage of the conversion circuit 132. Therefore, in order to reduce the voltage difference between the input voltage and output voltage of the conversion circuit, more and more charging devices use low-voltage, high-current methods to charge their batteries. However, the high charging current will also cause a large amount of heat to accumulate in the wireless receiving circuit 131.

[0041] Taking a charging power of 20W as an example, to reduce heat generation in the conversion circuit 132, the wireless charging device 120 can output the charging power using a low-voltage, high-current method, for example, 5V / 4A. Accordingly, the wireless receiving circuit 131 can convert the wireless charging signal into an output voltage / current of 5V / 4A. However, this high current will cause the transmitting coil of the wireless transmitting circuit 121 and the receiving coil of the wireless receiving circuit 131 to generate significant heat during power transmission. Heat generated during charging can affect charging speed, product lifespan, and reduce product reliability.

[0042] In summary, how to reduce heat generation during wireless charging has become an urgent problem to be solved.

[0043] In some related technologies, low charging power is used to reduce coil heating during wireless charging. For example, the wireless charging device 120 only outputs a maximum charging power of 7.5W to charge the device 130. This charging method is slow and takes a long time to fully charge the device 130.

[0044] In other related technologies, to speed up charging, the wireless charging device 120 uses a higher charging power (e.g., from 7.5W to 10W) ​​compared to a low-power method. However, this charging method does not reduce the charging time to the expected level (e.g., less than 100 minutes). As mentioned above, when high-power wireless charging is used, heating of the coil or the conversion circuit 130 is inevitable. In a system using magnetic coupling for wireless charging, the distance between the wireless charging device 120 and the device 130 to be charged is typically very small. The heated coil of the wireless charging device 120 transfers heat to the device 130 to be charged. Furthermore, the heat generated by the coil and conversion circuit of the device 130 itself is transferred to the battery to a certain extent. This, combined with the battery's own heating during the charging process, can easily cause the battery temperature to exceed the safe charging range. When heating of the coil, conversion circuit, or battery exceeds the safe range, it is necessary to return to a lower charging power (e.g., 7.5W) or suspend charging to ensure safe charging. Therefore, in this related technology, although the maximum charging power of wireless charging is increased, the charging time using the maximum charging power is very short. Wireless charging at a higher power for a short period of time does not shorten the charging time to the expected time.

[0045] In addition, to reduce heat generation, some related technologies also use heat dissipation technologies such as graphene and heat sinks to dissipate heat during the charging process. However, these heat dissipation technologies are not ideal, and they increase product costs, occupy internal space, and affect product appearance.

[0046] To solve the above problems, an embodiment of the present application provides a wireless charging system, which may include a wireless charging signal transmitting device (for example, the above-mentioned wireless charging device) and a wireless charging signal receiving device (for example, the above-mentioned device to be charged). The wireless charging signal transmitting device and the wireless charging signal receiving device are capable of wireless communication, and the transmission power of the wireless charging signal transmitting device can be adjusted based on the feedback signal sent by the wireless charging signal receiving device, so that the transmission power of the wireless charging signal transmitting device matches the charging voltage and / or charging current currently required by the battery. In this way, the wireless charging power can be increased and the charging speed can be increased according to the charging requirements of the wireless charging signal receiving device.

[0047] Secondly, in order to avoid excessive output current of the wireless receiving circuit, the wireless charging signal receiving device can also provide feedback on the output current of the wireless receiving circuit. In this way, the wireless charging signal transmitting device can adjust the transmission power based on the feedback signal of the output current of the wireless receiving circuit, so that the output current of the wireless receiving circuit meets the preset conditions.

[0048] By controlling the output current of the wireless receiving circuit through the wireless charging signal transmitting device, the heating of the wireless transmitting circuit (which includes the transmitting coil) and the wireless receiving circuit (which includes the receiving coil) can be controlled, thereby reducing the heating during the charging process. Therefore, compared with the related art, the duration of high-power wireless charging can be extended, the charging speed can be increased, and the charging time can be shortened. Figure 2 The wireless charging system provided in the embodiment of the present application is described, which can control the heat generated during the charging process by controlling the output current of the wireless receiving circuit.

[0049] like Figure 2 As shown, the wireless charging system provided in the embodiment of the present application includes a power supply device 210, a wireless charging signal transmitter 220 and a wireless charging signal receiver 230.

[0050] The power supply device 210 in the embodiment of the present application may be a power supply device with adjustable output power. The power supply device 210 may adjust the output power according to the charging state of the battery and / or the output current of the wireless receiving circuit.

[0051] The wireless charging signal transmitting device 220 may include a wireless transmitting circuit 221 and a first communication control circuit 222. The control function of the first communication control circuit 222 may be implemented by a micro control unit (MCU), for example.

[0052] The wireless charging signal receiving device 230 may include a wireless receiving circuit 231 and a second communication control circuit 235. The wireless receiving circuit 231 may be configured to receive the wireless charging signal transmitted by the wireless transmitting circuit 221 to charge the battery. The second communication control circuit 235 may be configured to communicate with the first communication control circuit 222 to facilitate adjustment of the output power of the wireless charging signal by the first communication control circuit 222. The control functions of the second communication control circuit 235 may be implemented, for example, by an MCU.

[0053] It is understandable that the wireless charging signal transmitting device may also be referred to as a transmitting device, and the wireless charging signal receiving device may also be referred to as a receiving device.

[0054] The wireless transmission circuit 221 can be used to transmit a wireless charging signal to charge the wireless charging signal receiving device 230. In some embodiments, the wireless transmission circuit 221 may include a wireless transmission drive circuit and a transmission coil or a transmission antenna. The wireless transmission drive circuit can be used to generate a higher-frequency alternating current, and the transmission coil or transmission antenna can be used to convert the higher-frequency alternating current into an electromagnetic signal for transmission.

[0055] The first communication control circuit 222 may have a communication function and may be used to wirelessly communicate with the wireless charging signal receiving device 230 during the wireless charging process. More specifically, the first communication control circuit 222 may communicate with the second communication control circuit 235. The wireless charging signal receiving device 230 may be a device to be charged or a chip with a wireless charging signal receiving function. The embodiments of the present application do not specifically limit the communication method between the first communication control circuit 222 and the wireless charging signal receiving device 230, nor the communication information exchanged between the first communication control circuit 222 and the wireless charging signal receiving device 230. These will be described in detail below in conjunction with specific embodiments.

[0056] The wireless charging signal transmitted by the wireless transmitting circuit 221 may be received by the wireless receiving circuit 231 , and the wireless receiving circuit 231 may convert the received wireless charging signal into an output current and an output voltage of the wireless receiving circuit 231 .

[0057] The detection circuit in the wireless charging signal receiving device 230 can detect the output current of the wireless receiving circuit 231. The second communication control circuit 235 can communicate with the first communication control circuit 222 based on the detected output current of the wireless receiving circuit 231 and send a first feedback signal to the first communication control circuit 222.

[0058] As mentioned above, the magnitude of the output current in the wireless transmitting circuit 221 and the wireless receiving circuit 231 is a key factor affecting the heat generated during wireless charging. In this embodiment of the present application, the first communication control circuit 222 can adjust the transmission power of the wireless charging signal based on the feedback signal corresponding to the output current of the wireless receiving circuit, so that the output current of the wireless receiving circuit meets the preset conditions.

[0059] After receiving the first feedback signal sent by the wireless charging signal receiving device 230 , the first communication control circuit 222 may adjust the transmission power of the wireless charging signal so that the output current of the wireless receiving circuit meets a preset condition.

[0060] Adjusting the transmission power of the wireless charging signal may refer to adjusting the voltage and / or current corresponding to the transmission power of the wireless charging signal based on the first feedback signal. The voltage and / or current corresponding to the transmission power of the wireless charging signal may be understood as the output voltage and / or output current of the wireless charging signal transmitted by the wireless transmitting circuit after being received by the wireless receiving circuit and converted by the wireless receiving circuit.

[0061] Adjusting the transmission power of the wireless charging signal may be adjusting the relationship between the voltage and current corresponding to the transmission power of the wireless charging signal when the transmission power of the wireless charging signal remains constant. For example, when the transmission power remains constant, the current may be reduced by increasing the voltage.

[0062] The first communication control circuit 222 adjusting the transmission power of the wireless charging signal may mean that the first communication control circuit 222 adjusts the transmission power of the wireless charging signal by controlling the output power of the power supply device 210 .

[0063] The first communication control circuit 222 controls the output power of the power providing device 210 , which may mean that the first communication control circuit 222 controls the output voltage and / or output current of the power providing device 210 .

[0064] For example, after receiving the first feedback signal, the first communication control circuit can send a second feedback signal to the power supply device to instruct the power supply device to adjust the output voltage and / or output current so that the output voltage and / or output current of the power supply device meet the output current requirements of the wireless receiving circuit.

[0065] In an embodiment of the present application, control over the transmission power adjustment of the wireless charging signal transmitter 220 is assigned to the power supply device. The power supply device adjusts the transmission power of the wireless charging signal by changing the output voltage and / or output current. The advantage of this adjustment method is that the power supply device 210 provides the power required by the wireless charging signal transmitter 220, eliminating power waste. This improves power conversion efficiency, reduces heat generation during the charging process, and increases charging speed compared to related technologies.

[0066] In this case, the output power of the power supply device can match the requirements of the wireless charging signal receiving device. The wireless charging signal transmitter can directly convert the power supply device's output power into a wireless charging signal for transmission, eliminating the need to adjust the power supply device's output power. Therefore, the wireless charging signal transmitter no longer needs to include a voltage conversion circuit, simplifying its design and reducing heat generation. This also prevents heat generation from the wireless charging signal transmitter from being transferred to the wireless charging signal receiving device, potentially causing heating of the wireless charging signal receiving device.

[0067] The embodiment of the present application does not specifically limit the communication method between the first communication control circuit 222 in the wireless charging signal transmitting device 220 and the second communication control circuit 235 in the wireless charging signal receiving device 230 .

[0068] Optionally, in some embodiments, the first communication control circuit 222 and the second communication control circuit 235 can communicate using wireless communication methods such as Bluetooth communication, wireless fidelity (Wi-Fi) communication or backscatter modulation (or power load modulation) communication, short-range wireless communication based on high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communication or mobile communication.

[0069] In one embodiment, the short-range wireless communication module based on a high carrier frequency may include an integrated circuit (IC) chip with an extremely high frequency (EHF) antenna encapsulated therein. Optionally, the high carrier frequency may be 60 GHz.

[0070] In one embodiment, the optical communication may be performed using an optical communication module. The optical communication module may include an infrared communication module, which may transmit information using infrared rays.

[0071] In one embodiment, the mobile communication may be performed using a mobile communication module. The mobile communication module may transmit information using a mobile communication protocol such as a 5G communication protocol, a 4G communication protocol, or a 3G communication protocol.

[0072] Compared with the Qi standard's communication method of coupling a coil to a wireless receiving circuit through signal modulation, the above-mentioned wireless communication method can improve communication reliability and avoid voltage ripple caused by signal coupling communication, which affects the voltage processing process of the step-down circuit.

[0073] Optionally, the first communication control circuit 222 and the second communication control circuit 235 may also communicate using a wired communication method of a data interface.

[0074] The present embodiment does not specifically limit the communication method between the first communication control circuit 222 in the wireless charging signal transmitter 220 and the power supply device 210. Similar to the communication method between the first communication control circuit 222 and the second communication control circuit 235, the communication between the first communication control circuit 222 and the power supply device 210 can also adopt any of the methods described above.

[0075] In one embodiment of the present application, the wireless charging signal transmitter 220 may serve as a bridge for communication between the power supply device 210 and the wireless charging signal receiver 230 , and is primarily responsible for forwarding information between the two.

[0076] For example, during the wireless charging process, the first communication control circuit 222 communicates with the wireless charging signal receiving device 230 to determine whether it is necessary to adjust the output voltage and / or output current of the power supply device 210; if it is necessary to adjust the output voltage and / or output current of the power supply device 210, the first communication control circuit 222 communicates with the power supply device 210 to instruct the power supply device 210 to adjust the output voltage and / or output current of the power supply device 210.

[0077] For example, during the wireless charging process, the first communication control circuit 222 inside the wireless charging signal transmitting device 220 communicates wirelessly with the wireless charging signal receiving device 230 to obtain adjustment information, where the adjustment information is used to instruct adjustment of the output voltage and / or output current of the power supply device 210; the first communication control circuit 222 communicates with the power supply device 210 and sends the adjustment information to the power supply device 210, so that the power supply device 210 adjusts the output voltage and / or output current of the power supply device according to the adjustment information.

[0078] It should be understood that, similar to the communication method between the wireless charging signal transmitting device 220 and the wireless charging signal receiving device 230, the communication between the wireless charging signal transmitting device 220 (or the first communication control circuit 222) and the power supply device 210 can be unidirectional communication or bidirectional communication, and the embodiment of the present invention does not specifically limit this.

[0079] It should also be understood that the output current of the power supply device can be constant direct current, pulsating direct current or alternating current, and the embodiments of the present application do not specifically limit this.

[0080] The embodiment of the present application does not limit the specific content of the first feedback signal.

[0081] As an example, the first feedback signal may include the magnitude of the output current of the wireless receiving circuit 231, or may include the difference between the output current of the wireless receiving circuit 231 and a target value. The target value may be a target maximum value, i.e., a preset maximum value of the output current of the wireless receiving circuit 231. When the output current of the wireless receiving circuit exceeds the target value, it indicates that the wireless receiving circuit 231 is experiencing severe heating.

[0082] After receiving the magnitude of the output current of the wireless receiving circuit 231 , the first communication control circuit 222 may control the power supply device 210 to adjust the output voltage and / or output current according to the magnitude of the output current of the wireless receiving circuit 231 .

[0083] It can be understood that when the wireless charging signal receiving device 230 has a certain power requirement, the output current of the wireless receiving circuit 231 can be reduced by increasing the output voltage of the power supply device 210 .

[0084] For example, when the first feedback signal indicates that the output current of the wireless receiving circuit 231 is greater than 2A, the first communication control circuit 222 may increase the output voltage of the power supply device 210 to reduce the output current of the wireless transmitting circuit 221 .

[0085] After receiving the difference between the output current of the wireless receiving circuit 231 and the target value, the first communication control circuit 222 may control the power supply device 210 to adjust the output voltage and / or output current according to the difference.

[0086] For example, if the first feedback signal indicates that the output current of the wireless receiving circuit 231 is higher than the target value, the first communication control circuit 222 may increase the output voltage of the power supply device 210. If the first feedback signal indicates that the output current of the wireless receiving circuit is lower than the target value, the first communication control circuit 222 may not adjust the output voltage and / or output current of the wireless transmitting circuit.

[0087] For another example, the first feedback signal may indicate the difference between the output current of the wireless receiving circuit 231 and a target value. When the difference is large, the first communication control circuit 222 may make a large-scale adjustment to the output voltage of the power supply device 210; when the difference is small, the first communication control circuit 222 may make a small-scale adjustment to the output voltage of the power supply device 210. More specifically, the output voltage of the power supply device 210 may have multiple levels. When the difference between the output current of the wireless receiving circuit 231 and the target value is large, the first communication control circuit 222 may adjust the output voltage of the power supply device 210 by multiple levels, with the voltage of each level being set to a fixed value, such as 10mV or 20mV. When the difference between the output current of the wireless receiving circuit 231 and the target value is small, the first communication control circuit 222 may adjust the output voltage of the power supply device 210 by one level.

[0088] For example, when the first feedback signal indicates that the output current of the wireless receiving circuit 231 is higher than the target value 1A, the first communication control circuit 222 can significantly increase the output voltage of the power supply device 210, such as adjusting the output voltage of the power supply device 210 by two levels; when the first feedback signal indicates that the output current of the wireless receiving circuit 231 is higher than the target value 0.5A, the first communication control circuit 222 can slightly increase the output voltage of the power supply device 210, such as adjusting the output voltage of the power supply device 210 by one level.

[0089] As another example, the first feedback signal may also include adjustment information to instruct the wireless transmission circuit to increase or decrease the output voltage. For example, the first feedback signal may instruct the first communication control circuit 222 to increase the output voltage of the wireless transmission circuit 221; for another example, the first feedback signal may instruct the first communication control circuit 222 to decrease the output voltage of the wireless transmission circuit 221.

[0090] It is understood that the first feedback signal may also include any combination of the various situations described above. For example, the first feedback signal may include the magnitude of the output current of the wireless receiving circuit 231, and the difference between the magnitude of the output current of the wireless receiving circuit 231 and the target value. For another example, the first feedback signal may include the difference between the magnitude of the output current of the wireless receiving circuit 231 and the target value, as well as adjustment information for increasing or decreasing the output voltage of the wireless transmitting circuit 221.

[0091] It is understood that when the transmission power of the wireless transmitting circuit 221 is constant, the output voltage and output current of the wireless receiving circuit 231 are inversely proportional. Therefore, the first feedback signal mentioned above may also include information related to the output voltage of the wireless receiving circuit 231.

[0092] Similarly, the embodiments of the present application do not limit the specific content of the second feedback signal. The specific content of the second feedback signal can be similar to the content of the first feedback signal. The content of the second feedback signal can be the same as or different from the content of the first feedback signal.

[0093] When the content of the second feedback signal is the same as that of the first feedback signal, the wireless charging signal transmitting device 220 can directly forward the content of the first feedback signal to the power supply device 210 after receiving the first feedback signal sent by the wireless charging signal receiving device 230, so as to control the power supply device 210 to adjust the output voltage and / or output current.

[0094] For example, the first feedback signal and the second feedback signal may both include the magnitude of the output current of the wireless receiving circuit 231, or the difference between the output current of the wireless receiving circuit 231 and a target value. After receiving the second feedback signal, the power supply device 210 may adjust the output voltage and / or output current of the power supply device 210 based on the output current of the wireless receiving circuit 231, so that the output current of the wireless receiving circuit meets a preset condition.

[0095] For another example, both the first feedback signal and the second feedback signal may include adjustment information. Power supply device 210 may directly adjust its output voltage accordingly based on the information indicating whether to increase or decrease the output voltage as indicated by the adjustment information. This eliminates the need for multiple feedback and confirmations, allowing the power supply device to adjust its output voltage to the desired voltage with a single feedback request, thereby reducing loop response time.

[0096] When the second feedback signal has different contents from the first feedback signal, the transmitter 220 representing the wireless charging signal may convert the received first feedback signal into a second feedback signal, and then send the second feedback signal to the power supply device 210 .

[0097] For example, the first feedback signal may include the magnitude of the output current of the wireless receiving circuit 231 and / or the difference between the output current of the wireless receiving circuit 231 and a target value. After receiving the first feedback signal, the wireless charging signal receiving device 230 may convert the content of the first feedback signal into adjustment information to instruct the power supply device 210 to increase or decrease the output voltage. After receiving the second feedback signal, the power supply device 210 may directly adjust the output voltage based on the adjustment information included in the second feedback signal. In this way, the power supply device does not need to go through multiple feedback and confirmations, and can adjust the output voltage of the power supply device to the required voltage with a single feedback, thereby saving loop response time.

[0098] In the technical solution provided in the embodiment of the present application, the receiving device of the wireless charging signal (such as the device to be charged) can detect the output current of the wireless receiving circuit. When the output current of the wireless receiving circuit exceeds a preset range, the device to be charged can notify the transmitting device of the wireless charging signal (such as a wireless charging base), and the wireless charging base then notifies the power supply device (such as an adapter). By controlling the output voltage of the adapter, the output current of the wireless receiving circuit is controlled, so that the output current of the wireless receiving circuit meets the requirements and the heating of the wireless receiving circuit is controlled. Therefore, compared with related technologies, the duration of high-power (for example, 15W) wireless charging can be extended, the charging speed can be increased, and the charging time can be shortened.

[0099] This embodiment of the present application transfers the voltage adjustment function to the power supply device. The wireless charging signal transmitter communicates with the power supply device, which then adjusts the output voltage. This eliminates the need for a voltage conversion circuit, simplifying the design of the wireless charging signal transmitter and controlling heating.

[0100] Alternatively, as Figure 3 As shown, the wireless charging signal transmitter 220 may further include a charging interface 223, which may be used to connect to an external power supply device 210. The wireless transmitting circuit 221 may also be used to generate a wireless charging signal according to the output voltage and output current of the power supply device 210.

[0101] The power supply device 210 may also include a third communication control circuit 211, which is used to communicate with the second communication control circuit 235. For example, the third communication control circuit 211 can receive a feedback signal sent by the second communication control circuit 235 and adjust the output voltage and / or output current of the power supply device 210 according to the feedback signal.

[0102] Optionally, the third communication control circuit 211 in the power supply device 210 can be used to receive a second feedback signal from the wireless charging signal transmitter 220, and adjust the output voltage and / or output current of the power supply device 210 according to the second feedback signal; wherein the second feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit 231.

[0103] Optionally, the third communication control circuit 211 is also used to receive a fourth feedback signal from the wireless charging signal transmitting device 220, and adjust the output power of the power supply device 210 according to the fourth feedback signal, wherein the fourth feedback signal is a feedback signal corresponding to the charging information of the battery, and the charging information of the battery includes at least one of the following information: charging voltage, charging current, current power and current voltage.

[0104] The specific contents of the second feedback signal and the fourth feedback signal can be found in the above description and will not be repeated here.

[0105] In the embodiment of the present application, the output power of the power supply device 210 may be adjustable. The first communication control circuit 222 may adjust the output power of the power supply device 210 according to the requirements of the wireless charging signal receiving device 230.

[0106] The present application does not specifically limit the type of the power supply device 210. For example, the power supply device 210 can be an adapter, a power bank, a car charger, or a computer.

[0107] This application does not specifically limit the type of charging interface 223. Optionally, in some embodiments, the charging interface 223 may be a USB interface. The USB interface may be, for example, a USB 2.0 interface, a micro USB interface, or a USB TYPE-C interface. Optionally, in other embodiments, the charging interface 223 may also be a Lightning interface, or any other type of parallel and / or serial port capable of charging.

[0108] The embodiment of the present application does not specifically limit the communication method between the first communication control circuit 222 and the power supply device 210. As an example, the first communication control circuit 222 can be connected to the power supply device 210 through a communication interface other than the charging interface, and communicate with the power supply device 210 through the communication interface. As another example, the first communication control circuit 222 can communicate with the power supply device 210 in a wireless manner. For example, the first communication control circuit 222 can perform near field communication (NFC) with the power supply device 210. As another example, the first communication control circuit 222 can communicate with the power supply device 210 through the charging interface 223 without providing an additional communication interface or other wireless communication module, which can simplify the implementation of the wireless charging device 220. For example, the charging interface 223 is a USB interface, and the first communication control circuit 222 can communicate with the power supply device 210 based on the data line (such as D+ and / or D- line) in the USB interface. For another example, the charging interface 223 may be a USB interface (such as a USB TYPE-C interface) that supports the power delivery (PD) communication protocol, and the first communication control circuit 222 and the power supply device 210 may communicate based on the PD communication protocol.

[0109] The wireless charging signal receiving device 230 further includes a first charging channel 233 , through which the output voltage and / or output current of the wireless receiving circuit 231 can be provided to the battery 232 to charge the battery 232 .

[0110] Optionally, a voltage conversion circuit 239 may be further provided on the first charging channel 233 , wherein the input end of the voltage conversion circuit 239 is electrically connected to the output end of the wireless receiving circuit 231 , and is used to step down the output voltage of the wireless receiving circuit 231 to charge the battery 232 .

[0111] The voltage conversion circuit 239 can be a Buck circuit, a Boost circuit, a charge pump, or a charge management circuit.

[0112] In one embodiment, because a charge pump is composed of multiple switching devices, the heat generated by current flowing through the switching devices is very small, almost equivalent to the heat generated by current flowing directly through a wire. Therefore, using a charge pump as the voltage conversion circuit 239 not only achieves a voltage reduction effect but also reduces heat generation. As an example, the voltage conversion circuit 239 can also be a half-voltage circuit.

[0113] Optionally, the voltage conversion circuit 239 may be used to step down the output voltage and / or adjust the output current of the wireless receiving circuit 231 so that the output voltage and / or output current of the voltage conversion circuit 239 matches the current charging requirement of the battery.

[0114] As mentioned above, the conversion efficiency of the voltage conversion circuit 239 is limited by the voltage difference between the input end and the output end of the voltage conversion circuit 239. If the voltage difference between the two ends of the voltage conversion circuit 239 is too large, the conversion efficiency of the voltage conversion circuit 239 will be too low, causing the unconverted part of the electrical energy to be dissipated in the form of heat, making the voltage conversion circuit 239 generate more serious heat.

[0115] Therefore, the voltage at the input end of the voltage conversion circuit 239 cannot be too large, that is, the output voltage of the wireless receiving circuit 231 cannot be too large, and the output current of the wireless receiving circuit 231 cannot be too small.

[0116] The embodiment of the present application can also set a target minimum value for the output current of the wireless receiving circuit 231. When the charging power is constant, if the output current of the wireless receiving circuit 231 is smaller, the output voltage of the wireless receiving circuit 231 is larger. If the output voltage of the wireless receiving circuit 231 is too large, the voltage difference between the input and output ends of the voltage conversion circuit 239 will be larger. The greater the voltage difference between the two ends of the voltage conversion circuit 239, the lower its step-down conversion efficiency and the more serious the heat generation. The embodiment of the present application sets a target minimum value for the output current of the wireless receiving circuit 231, which can improve the conversion efficiency of the voltage conversion circuit 239 and further control the heat generation during the wireless charging process.

[0117] By setting the target maximum value and target minimum value of the output current of the wireless receiving circuit 231, not only the heating of the wireless transmitting circuit 221 and the wireless receiving circuit 231 can be controlled, but also the voltage difference between the output voltage of the wireless receiving circuit 231 and the charging voltage of the battery can be controlled, thereby improving the charging efficiency.

[0118] Optionally, the second communication control circuit 235 may send a first feedback signal to the first communication control circuit 222 to instruct the first communication control circuit 222 to adjust the transmit power of the wireless charging signal so that the output current of the wireless receiving circuit 231 is within a preset range. The preset range may be a range consisting of a target maximum value and a target minimum value for the output current of the wireless receiving circuit 231.

[0119] When the output current of the wireless receiving circuit 231 is less than the target minimum value, the first communication control circuit 222 may increase the output current of the wireless receiving circuit 231 by controlling the power supply device 210 to reduce the output voltage. When the output current of the wireless receiving circuit 231 is greater than the target maximum value, the first communication control circuit 222 may decrease the output current of the wireless receiving circuit 231 by controlling the power supply device 210 to increase the output voltage. When the output current of the wireless receiving circuit 231 is within a preset range, the first communication control circuit 222 may not control the power supply device 210 to adjust the output voltage.

[0120] It is understood that the minimum value of the output current of the wireless receiving circuit 231 is set to ensure that the voltage difference across the voltage conversion circuit 239 is not too large, thereby affecting the voltage conversion efficiency. Therefore, the embodiment of the present application can also set a first target maximum value for the voltage difference across the voltage conversion circuit 239. The first communication control circuit 222 can adjust the output voltage and / or output current of the power supply device 210 based on the voltage difference between the input and output terminals of the voltage conversion circuit 239.

[0121] Optionally, the first feedback signal may also include voltage difference information, which may be the voltage difference between the input and output of the voltage conversion circuit 239, or the difference between the voltage difference and the first target maximum value. The wireless charging signal receiving device 230 may collect this voltage difference information and, based on this voltage difference information, send a first feedback signal to the first communication control circuit 222. After receiving the first feedback signal, the first communication control circuit 222 may send a second feedback signal to the power supply device 210 to trigger the power supply device 210 to adjust the output voltage.

[0122] For example, when the voltage difference indicated by the first feedback signal is greater than the first target maximum value, the first communication control circuit 222 can send a second feedback signal to the power supply device 210 to trigger the power supply device 210 to reduce the output voltage, thereby reducing the input voltage of the buck circuit.

[0123] The embodiment of the present application does not specifically limit the manner in which the second communication control circuit 235 sends the first feedback signal to the first communication control circuit 222 .

[0124] For example, the second communication control circuit 235 may periodically send a first feedback signal to the first communication control circuit 222. Alternatively, the second communication control circuit 235 may send the first feedback signal to the first communication control circuit 222 only after the output current of the wireless receiving circuit 231 does not meet a preset condition. If the output current of the wireless receiving circuit 231 meets the preset condition, the second communication control circuit 235 may not send the first feedback signal to the first communication control circuit 222.

[0125] Optionally, the second communication control circuit 235 may further detect the charging information of the battery 232 and send a third feedback signal to the first communication control circuit 222. The third feedback signal may be a feedback signal corresponding to the battery charging information, and the battery charging information may include at least one of the following information: charging voltage, charging current, current charge level, and current voltage. The first communication control circuit 222 may adjust the transmission power of the wireless charging signal based on the third feedback signal.

[0126] The charging voltage and charging current of the battery may also refer to the output voltage and output current on the first charging channel.

[0127] In one embodiment, the detection circuit for detecting the output current of the wireless receiving circuit and the detection circuit for detecting the battery charging information are the same detection circuit. In another embodiment, the detection circuit for detecting the output current of the wireless receiving circuit and the detection circuit for detecting the battery charging information are different detection circuits, so that the output current of the wireless receiving circuit and the battery charging information can be detected separately by two detection circuits.

[0128] In one embodiment, for a charging device, during trickle charging, the battery voltage will continue to rise, and the charging power required by the battery will also increase accordingly. In this case, the transmission power of the wireless charging signal needs to be increased to meet the current charging needs of the battery. During constant voltage charging, the battery charging current continues to decrease, and the charging power required by the battery will also decrease accordingly. In this case, the transmission power of the wireless charging signal needs to be reduced to meet the current charging needs of the battery.

[0129] Optionally, the first feedback signal may be used to trigger the first communication control circuit 222 to adjust the transmission power of the wireless charging signal so that the transmission power of the wireless charging signal matches the current required charging voltage and / or charging current of the battery.

[0130] The first communication control circuit 222 can adjust the transmission power of the wireless charging signal according to the third feedback signal, which can refer to the first communication control circuit 222 sending a fourth feedback signal to the power supply device 210 according to the third feedback signal to trigger the power supply device 210 to adjust the output voltage and / or output current, so that the output voltage and / or output current of the power supply device 210 matches the charging voltage and / or charging current currently required by the battery 232.

[0131] The power supply device 210 matches the output voltage and / or output current with the charging voltage and / or charging current currently required by the battery 232 may mean: the power supply device 210 configures the output voltage and / or output current so that the output voltage and / or output current of the first charging channel 233 matches the charging voltage and / or charging current currently required by the battery 232 (or, the power supply device configures the output voltage and / or output current so that the output voltage and / or output current of the first charging channel 233 meets the charging requirements of the battery 232 (including the battery 232's requirements for charging voltage and / or charging current)).

[0132] It should be understood that in one embodiment of the present disclosure, "the output voltage and / or output current of the first charging channel 232 matches the charging voltage and / or charging current currently required by the battery 232" includes: the voltage value and / or current value of the direct current output by the first charging channel 232 is equal to the charging voltage value and / or charging current value required by the battery 232 or is within a floating preset range (for example, the voltage value fluctuates by 100 mV to 200 mV, the current value fluctuates by 0.001A to 0.005A, etc.).

[0133] The charging process of the battery may include at least one of a trickle charging stage, a constant current charging stage, and a constant voltage charging stage.

[0134] The above-mentioned second communication control circuit 235 wirelessly communicates with the first communication control circuit 222 based on the voltage and / or current on the first charging channel 233 detected by the detection circuit, so that the first communication control circuit 222 adjusts the output power of the power supply device 210 based on the voltage and / or current on the first charging channel 233. This may include: in the trickle charging stage of the battery 232, the second communication control circuit 235 wirelessly communicates with the first communication control circuit 222 based on the voltage and / or current on the first charging channel 233 detected by the detection circuit 234, so that the first communication control circuit 222 controls the output power of the power supply device 210, so that the output current of the first charging channel 233 matches the charging current corresponding to the trickle charging stage (or, so that the output current of the first charging channel 233 meets the charging current requirement of the battery 232 in the trickle charging stage).

[0135] The embodiment of the present application does not specifically limit the content of the third feedback signal and the fourth feedback signal. The content of the third feedback signal and the content of the fourth feedback signal may be the same or different.

[0136] As an example, the content of the third feedback signal and the content of the fourth feedback signal can be the same, and the third feedback signal and the fourth feedback signal can both include battery charging information. The first communication control circuit 222 can directly forward the battery charging information included in the first feedback signal to the power supply device 210, and the power supply device 210 can adjust the output power based on the battery charging information.

[0137] In this case, it is the power supply device 210 that determines the increase or decrease in its output voltage.

[0138] The power supply device 210 can determine the current charging stage of the battery 232 based on the current power level and / or current voltage of the battery 232, and further determine a target charging voltage and / or target charging current that matches the charging voltage and / or charging current currently required by the battery 232. Then, the power supply device 210 can also compare the output voltage and / or output current of the first charging channel 233 with the above-mentioned target charging voltage and / or target charging current to determine whether the output voltage and / or output current of the first charging channel 233 matches the charging voltage and / or charging current currently required by the battery 232, and if the output voltage and / or output current of the first charging channel 233 does not match the charging voltage and / or charging current currently required by the battery 232, adjust the output power of the power supply device 210 until the output voltage and / or output current of the first charging channel 233 matches the charging voltage and / or charging current currently required by the battery 232.

[0139] As another example, the content of the third feedback signal and the content of the fourth feedback signal can be the same, and both can include adjustment information. This adjustment information can be used to trigger the power supply device 210 to adjust the output power. For example, the adjustment information can instruct the power supply device 210 to increase the output power; in another example, the adjustment information can instruct the power supply device 210 to decrease the output power. More specifically, the power supply device 210 can set multiple output power levels. Each time the power supply device 210 receives an adjustment information, it adjusts the output power level by one level until the output voltage and / or output current of the first charging channel 233 matches the current charging voltage and / or charging current required by the battery 232.

[0140] In this case, the increase or decrease of the output voltage of the power supply device is determined by the receiving device of the wireless charging signal.

[0141] As another example, the third feedback signal may include battery charging information. The first communication control circuit 222 may convert the battery charging information into adjustment information for increasing or decreasing the output voltage, and based on the adjustment information, send a fourth feedback signal to the power supply device 210. After receiving the fourth feedback signal, the power supply device 210 may directly adjust the output voltage according to the adjustment information.

[0142] In this case, the increase or decrease of the output voltage of the power supply device is determined by the first communication control circuit.

[0143] For example, the second feedback signal includes the battery's charging voltage and current voltage. After receiving the second feedback signal, the first communication control circuit 222 can determine whether the power supply device 210 should increase or decrease the output voltage based on the battery's charging voltage and current voltage. When the battery's charging voltage is lower than the battery's current voltage, the first communication control circuit 222 can send output voltage increase adjustment information to the power supply device 210, thereby triggering the power supply device 210 to increase the output voltage.

[0144] Optionally, embodiments of the present application can set different output current ranges for the wireless receiving circuit for different charging stages. For example, during the trickle charging stage, the charging current required by the device to be charged is relatively small, so a smaller output current range can be set; during the constant current charging stage, the charging current required by the device to be charged is relatively large, so a larger charging current range can be set.

[0145] In the embodiment of the present application, the wireless charging signal transmitter 220 may adjust the output power of the wireless transmission circuit 221 in a variety of ways. Specifically, the adjustment method may include any one of the following two methods or a combination of several of them:

[0146] (1) When the input voltage of the wireless transmitting circuit 221 is fixed, the output power of the wireless transmitting circuit 221 can be adjusted by adjusting parameters such as the tuning frequency of the resonant circuit and / or the duty cycle of the switching tube of the inverter circuit.

[0147] (2) By adjusting the output voltage of the power supply device 210 (ie, the voltage of the transmitter of the wireless charging signal), the output power of the wireless transmitting circuit 221 is adjusted.

[0148] Optionally, in some embodiments, the wireless charging signal transmitter 220 may support a first wireless charging mode and a second wireless charging mode, and the wireless charging signal transmitter 220 may charge the device to be charged faster in the first wireless charging mode than in the second wireless charging mode. In other words, compared to the wireless charging signal transmitter 220 operating in the second wireless charging mode, the wireless charging signal transmitter 220 operating in the first wireless charging mode takes less time to fully charge the battery of the device to be charged of the same capacity.

[0149] The second wireless charging mode may be what is called a normal wireless charging mode, for example, it may be a traditional wireless charging mode based on the QI standard, the PMA standard or the A4WP standard. The first wireless charging mode may be a fast wireless charging mode. The normal wireless charging mode may refer to a wireless charging mode in which the transmission power of the wireless charging signal transmitting device 220 is relatively small (usually less than 15W, and the commonly used transmission power is 5W or 10W). In the normal wireless charging mode, it usually takes several hours to fully charge a large capacity battery (such as a 3000 mAh battery); while in the fast wireless charging mode, the transmission power of the wireless charging signal transmitting device 220 is relatively large (usually greater than or equal to 15W). Compared with the normal wireless charging mode, the charging time required for the wireless charging signal transmitting device 220 to fully charge a battery of the same capacity in the fast wireless charging mode can be significantly shortened and the charging speed can be faster.

[0150] See also Figure 4 In one embodiment of the present disclosure, the wireless charging signal receiving device 230 further includes a second charging channel 236. The second charging channel 236 can be a conductive wire. A conversion circuit 237 can be provided on the second charging channel 236 to control the voltage of the direct current output by the wireless receiving circuit 231 to obtain an output voltage and output current of the second charging channel 236 to charge the battery 232.

[0151] In one embodiment, the conversion circuit 237 can be used as a step-down circuit and output constant current and / or constant voltage electrical energy. In other words, the conversion circuit 237 can be used to perform constant voltage and / or constant current control on the battery charging process.

[0152] When charging the battery 232 using the second charging channel 236, the wireless transmitting circuit 221 may transmit an electromagnetic signal at a constant transmission power. After the wireless receiving circuit 231 receives the electromagnetic signal, the conversion circuit 237 processes the signal into a voltage and current that meets the charging requirements of the battery 232 and inputs the signal into the battery 232, thereby charging the battery 232. It should be understood that in some embodiments, the constant transmission power does not necessarily mean that the transmission power remains completely constant; it may vary within a certain range, for example, a transmission power of 7.5W with a fluctuation of 0.5W.

[0153] In this embodiment, the second communication control circuit 235 is also used to compare the output voltage value of the rectifier circuit in the detected wireless receiving circuit with a set target value (for example, the maximum voltage value that the rectifier circuit needs to output), determine the error value, and then send the error value to the wireless charging signal transmitting device 220 in the form of a data packet.

[0154] In one embodiment, when charging the battery 232 via the second charging channel 236, the wireless charging signal transmitter and the device being charged can be wirelessly charged according to the Qi standard. Thus, a data signal containing the aforementioned error value can be coupled to the coil of the wireless receiving circuit 231 through signal modulation, transmitted to the coil of the wireless transmitting circuit 221, and then transmitted to the first communication control circuit. Based on the information in the error data packet, the first communication control circuit adjusts the transmission parameters of the wireless transmitting circuit 221, such as the operating frequency of the transmitting coil.

[0155] In the embodiment of the present disclosure, the first wireless charging mode is used to charge the battery 232 via the first charging channel 233, and the second wireless charging mode is used to charge the battery 232 via the second charging channel 236. The wireless charging signal transmitter and the device to be charged can determine whether to use the first wireless charging mode or the second wireless charging mode to charge the battery 232 through handshake communication.

[0156] In the disclosed embodiment, on the wireless charging device side, when charging the device to be charged using the first wireless charging mode, the maximum transmission power of the wireless transmission circuit 221 may be a first transmission power value. When charging the device to be charged using the second wireless charging mode, the maximum transmission power of the wireless transmission circuit 221 may be a second transmission power value. The first transmission power value is greater than the second transmission power value. Therefore, the first wireless charging mode can charge the device to be charged faster than the second wireless charging mode.

[0157] Optionally, the second communication control circuit 235 may also be used to control the switching between the first charging channel 233 and the second charging channel 236. Figure 4As shown, a switch 238 can be provided on the first charging channel 233, and the second communication control circuit 235 can control the switching between the first charging channel 233 and the second charging channel 236 by controlling the on and off state of the switch 238. As noted above, in certain embodiments, the wireless charging signal transmitter 220 can include a first wireless charging mode and a second wireless charging mode, and the wireless charging signal transmitter 220 charges the device to be charged 230 faster in the first wireless charging mode than in the second wireless charging mode. When the wireless charging signal transmitter 220 uses the first wireless charging mode to charge the battery in the device to be charged 230, the device to be charged 230 can control the operation of the first charging channel 233; when the wireless charging signal transmitter 220 uses the second wireless charging mode to charge the battery in the device to be charged 230, the device to be charged 230 can control the operation of the second charging channel 236.

[0158] As described above, in one embodiment, in order to reduce the problem of coil heating during wireless charging, when the first wireless charging mode is adopted, the above-mentioned Figure 1-Figure 3 The charging method described is for wireless charging.

[0159] On the device being charged, the second communication control circuit 235 can switch between the first charging channel 233 and the second charging channel 236 depending on the charging mode. When in the first wireless charging mode, the second communication control circuit 235 controls the voltage conversion circuit 239 on the first charging channel 233. When in the second wireless charging mode, the second communication control circuit 235 controls the conversion circuit 237 on the second charging channel 236.

[0160] Optionally, the wireless charging signal transmitter 220 may communicate with the wireless charging signal receiver 230 to negotiate a charging mode between the wireless charging signal transmitter 220 and the wireless charging signal receiver 230 .

[0161] In addition to the communication described above, the first communication control circuit 222 in the wireless charging signal transmitter 220 and the second communication control circuit 235 in the wireless charging signal receiver 230 may also exchange a variety of other communication information. In some embodiments, the first communication control circuit 222 and the second communication control circuit 235 may exchange information used for safety protection, anomaly detection, or fault handling, such as battery 232 temperature information, indications of overvoltage or overcurrent protection, and power transmission efficiency information (this power transmission efficiency information may be used to indicate the power transmission efficiency between the wireless transmitting circuit 221 and the wireless receiving circuit 231).

[0162] Optionally, the communication between the second communication control circuit 235 and the first communication control circuit 222 may be unidirectional communication or bidirectional communication, which is not specifically limited in the embodiment of the present application.

[0163] In the embodiment of the present application, the function of the second communication control circuit can be implemented by the application processor of the wireless charging signal receiving device 230, thereby saving hardware costs. Alternatively, it can be implemented by an independent control chip, which can improve control reliability.

[0164] Optionally, embodiments of the present application can integrate both the wireless receiving circuit 232 and the voltage conversion circuit 239 into the same wireless charging chip, thereby increasing the integration level of the device to be charged and simplifying the implementation of the device to be charged. For example, the functionality of a traditional wireless charging chip can be expanded to support charging management functions.

[0165] The battery 232 in the wireless charging system provided in the embodiment of the present application may include one battery cell, or may include N battery cells connected in series (N is a positive integer greater than 1). Taking N=2 as an example, the battery 232 may include a first battery cell and a second battery cell, and the first battery cell and the second battery cell are connected in series. Take the charging power equal to 20W and the charging voltage of a single battery cell equal to 5V as an example for explanation. In order to meet the charging voltage requirements of the dual battery cells in series, the output voltage / output current of the first charging channel 233 needs to be maintained at 10V / 2A. In this way, the wireless transmitting circuit generates an electromagnetic signal based on 10V / 2A, and accordingly, the wireless receiving circuit converts the electromagnetic signal into an output voltage / output current of 10V / 2A. Since the current is reduced from 4A to 2A, the heat generated during the power transmission process will be reduced accordingly. Therefore, the embodiment of the present application can also use multiple battery cells connected in series to reduce the heat generated by the wireless transmitting circuit 221 and the wireless receiving circuit 231.

[0166] The above description uses N=2 as an example. In practice, N can be 3 or a positive integer greater than 3. The more cells connected in series, the less heat is generated by the wireless transmitting circuit 221 and the wireless receiving circuit 231.

[0167] In one embodiment of the present application, in order to ensure the charging speed and further alleviate the heating phenomenon of the wireless charging signal receiving device 230, the embodiment of the present application further modified the battery structure inside the wireless charging signal receiving device 230, and introduced multiple battery cells connected in series. Compared with the single-cell solution, if the same charging speed is to be achieved, the charging current required by the multiple battery cells is 1 / N of the charging current required by the single battery cell (N is the number of battery cells connected in series within the wireless charging signal receiving device 230). In other words, under the premise of ensuring the same charging speed, the embodiment of the present invention can significantly reduce the size of the charging current, thereby further reducing the heat generated by the wireless charging signal receiving device 230 during the charging process.

[0168] In one embodiment of the present application, the multiple battery cells can be battery cells with the same or similar specifications and parameters. Battery cells with the same or similar specifications are convenient for unified management, and selecting battery cells with the same or similar specifications and parameters can improve the overall performance and service life of the multiple battery cells.

[0169] During the charging process, the power output from the first charging channel or the second charging channel can be used to charge multiple battery cells connected in series. During the power supply process, a step-down circuit can be used to step down the voltage of the multiple battery cells and then power the wireless charging signal receiving device 230. Alternatively, a single battery cell can be used to power the system. In addition, during the charging process, if power is required for the system, a path can be directly allocated through the charging management circuit to power the system.

[0170] To maintain a balanced charge across multiple cells, a balancing circuit can be used during the charge and discharge process. There are many ways to implement this circuit. For example, a load can be connected across the cell to consume the charge in the cell, aligning it with the charge in the other cells and thus maintaining a consistent voltage across the cells. Alternatively, cells with a higher charge can be used to charge cells with a lower charge until the voltages of the cells are consistent.

[0171] As previously mentioned, the battery charging process may include one or more of a trickle charge phase, a constant current charge phase, and a constant voltage charge phase. In one embodiment of the present application, to further increase the charging speed, the charging voltage and charging current are controlled to shorten the charging duration of the constant voltage charge phase or to eliminate the constant voltage charge phase. This significantly increases the charging speed compared to the charging process in related arts.

[0172] In one embodiment, a limit voltage Vn is set that is higher than the standard cut-off voltage of the battery, and a plurality of charging currents [I1, I2, I3, ..., In] are set, where n ≥ 1. Here, I1 ≥ I2 ≥ I3 ... . It should be understood that the limit voltage Vn is related to the battery system, the materials used, etc. In some embodiments, if the standard cut-off voltage of the battery is V0, Vn can be set to V0 + ΔV. For example, ΔV can be between 0.05V and 0.1V. The values ​​of the charging currents I1, I2, ..., In are also related to the battery system, the materials used, etc. For example, In can be 700mA.

[0173] Once the battery system and battery capacity are determined, the charging current at different stages can be determined based on the relationship between charging voltage, charging current, charging time, and battery capacity. When the charging voltage reaches the limit voltage Vn, the charging current can be determined. In some embodiments, the difference between two adjacent charging currents in I1, I2, I3, ..., and In can be ΔI. For example, ΔI can range from 100mA to 1A.

[0174] In some embodiments, whether using the first or second charging channel described above, when the battery voltage reaches the standard cutoff voltage, constant current charging is performed on the battery using charging current I1 until the battery voltage reaches the limit voltage Vn. Since the battery is charged with constant current using current I1, the voltage will drop after stopping. Therefore, the battery can be charged with constant current using current I2 until the battery voltage reaches the limit voltage Vn. The above steps are repeated until the last step charging current In is used to charge to the limit voltage Vn, at which point charging can be stopped. Therefore, by setting the limit voltage Vn and the charging current at each stage, the constant voltage charging stage in the related art can be omitted, greatly saving charging time.

[0175] When the battery voltage reaches the standard cut-off voltage, the battery is charged through multiple charging stages, each of which corresponds to a charging current, and the charging current corresponding to the previous charging stage of the adjacent charging stage is greater than the charging current corresponding to the next charging stage. Each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, and the limit voltage is greater than the standard cut-off voltage of the battery. When multiple charging stages are completed, charging is stopped.

[0176] In other embodiments, whether the first charging channel or the second charging channel described above is used, when the battery voltage is charged to the standard cut-off voltage, the battery is charged with a constant current using the charging current I1 until the battery voltage reaches the limit voltage Vn. The battery is then charged with a constant current using the current I2 until the battery voltage reaches the limit voltage Vn. The above steps are repeated until the last step charging current In is used to charge to the limit voltage Vn. Then, with Vn as the charging voltage, the constant voltage charging preset time or the charging current is reduced to a preset value (for example, 100mA), and then charging is stopped. In this embodiment, since the charging cut-off voltage can be increased and the duration of constant voltage charging can be reduced, the charging time can be greatly saved compared to related technologies. That is:

[0177] When the battery voltage reaches the standard cut-off voltage, the battery is charged through multiple charging stages, each of which corresponds to a charging current, and the charging current corresponding to the previous charging stage of the adjacent charging stage is greater than the charging current corresponding to the next charging stage. Each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, and the limit voltage is greater than the standard cut-off voltage of the battery; the battery is charged at a constant voltage at the limit voltage until the charging current of the battery reaches the target constant voltage charging cut-off current or the charging time reaches a preset time, and then charging stops.

[0178] When a battery has multiple cells, the above method requires monitoring the voltage of each cell to ensure it reaches the standard cutoff voltage and limit voltage. When the voltage of any cell reaches the standard cutoff voltage or limit voltage, the charging current is changed. Alternatively, in some embodiments, the charging path of fully charged cells can be disconnected while charging of partially charged cells continues. In other words, each cell can be charged independently according to the above charging process.

[0179] Combined with the above Figure 2-Figure 4 , describes the device embodiment of the present application in detail, and the following is combined with Figure 5-Figure 7 , the method embodiments of the present application are described in detail. The method embodiments correspond to the device embodiments, so for the parts not described in detail, please refer to the previous device embodiments.

[0180] Figure 5 1 is a schematic flow chart of a wireless charging method provided in an embodiment of the present application. The method can be applied to a wireless charging signal transmitting device, such as the wireless charging signal transmitting device 220 described above. Figure 5 The method includes steps S510-S520.

[0181] S510: Transmit a wireless charging signal.

[0182] S520. Receive a first feedback signal from a receiving device, and send a second feedback signal to a power supply device based on the first feedback signal, wherein the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit, and the second feedback signal is used to trigger the power supply device to adjust the output voltage and / or output current of the power supply device.

[0183] Optionally, the first feedback signal is used to indicate a difference between the output current of the wireless receiving circuit and a target value, and the wireless charging method further includes: determining adjustment information based on the difference between the output current of the wireless receiving circuit and the target value; and sending the second feedback signal to the power supply device, wherein the second feedback signal includes the adjustment information.

[0184] Optionally, both the first feedback signal and the second feedback signal include adjustment information, where the adjustment information is used to instruct the power supply device to adjust the output voltage and / or output current of the power supply device.

[0185] Optionally, the wireless charging method further includes: receiving a third feedback signal from the receiving device;

[0186] A fourth feedback signal is sent to the power supply device based on the third feedback signal; wherein the third feedback signal is a feedback signal corresponding to the charging information of the battery, and the charging information of the battery includes at least one of the following information: charging voltage, charging current, current power and current voltage, and the fourth feedback signal is used to trigger the power supply device to adjust the output power of the power supply device.

[0187] Optionally, the third feedback signal includes battery charging information, and the wireless charging method further includes: determining adjustment information based on the battery charging information; and sending the fourth feedback signal to the power supply device, where the fourth feedback signal includes the adjustment information.

[0188] Optionally, the third feedback signal and the fourth feedback signal both include adjustment information, where the adjustment information is used to instruct the power supply device to adjust the output power of the power supply device.

[0189] Optionally, the wireless charging method is applied to a transmitting device, which supports a first wireless charging mode and a second wireless charging mode, wherein the transmitting device charges the receiving device faster in the first wireless charging mode than in the second wireless charging mode.

[0190] Optionally, the wireless charging method further includes: communicating with the receiving device to negotiate using the first wireless charging mode or the second wireless charging mode for wireless charging.

[0191] Optionally, the wireless charging method further includes: performing handshake communication with the receiving device; and when the handshake communication is successful, controlling the transmitting device to use the first wireless charging mode to charge the receiving device.

[0192] Optionally, the wireless charging method further includes: performing handshake communication with the receiving device; and when the handshake communication fails, controlling the transmitting device to use the second wireless charging mode to charge the receiving device.

[0193] Optionally, the first feedback signal and the second feedback signal are transmitted using at least one of the following methods: Bluetooth, wireless fidelity, backscatter modulation, high carrier frequency short-range wireless communication, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

[0194] Optionally, the high carrier frequency is 60 GHz.

[0195] Optionally, the optical communication is based on infrared rays.

[0196] Optionally, the mobile communication is performed based on at least one of the following communication protocols: 5G communication protocol, 4G communication protocol and 3G communication protocol.

[0197] Figure 6 1 is a schematic flow chart of a wireless charging method provided in an embodiment of the present application. The method can be applied to a wireless charging signal receiving device, such as the wireless charging signal receiving device 230 described above. Figure 6 The method includes steps S610-S630.

[0198] S610: Receive a wireless charging signal from a transmitting device.

[0199] S620: Generate an output current of a wireless receiving circuit according to the wireless charging signal.

[0200] S630. Detect the output current of the wireless receiving circuit and send a first feedback signal to the transmitting device, wherein the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit, and the first feedback signal is used to trigger the transmitting device to adjust the voltage and / or current corresponding to the transmission power of the wireless charging signal.

[0201] Optionally, the first feedback signal is used to indicate a difference between an output current of the wireless receiving circuit and a target value.

[0202] Optionally, the first feedback signal includes adjustment information, and the adjustment information is used to instruct the transmitting device to adjust the magnitude of the voltage and / or current corresponding to the transmit power.

[0203] Optionally, the output current of the wireless receiving circuit is used to charge the battery, and the wireless charging method further includes: detecting the charging information of the battery and sending a third feedback signal to the transmitting device, wherein the third feedback signal is a feedback signal corresponding to the charging information of the battery, and the third feedback signal is used to trigger the transmitting device to adjust the transmission power of the wireless charging signal, and the charging information of the battery includes at least one of the following information: charging voltage, charging current, current power and current voltage.

[0204] Optionally, the third feedback signal includes adjustment information, and the adjustment information is used to instruct the transmitting device to adjust the transmit power.

[0205] Optionally, the wireless charging method further includes: charging the battery using a first charging channel according to the output current of the wireless receiving circuit.

[0206] Optionally, a voltage conversion circuit is provided on the first charging channel.

[0207] Optionally, the voltage conversion circuit is a Buck circuit, a Boost circuit, a charge pump or a charge management circuit.

[0208] Optionally, the wireless charging method further includes: using a conversion circuit on a second charging channel to receive the output voltage and output current of the wireless receiving circuit, performing constant voltage and / or constant current control on the output voltage and / or output current of the wireless receiving circuit, so that the output voltage and / or output current of the second charging channel matches the charging voltage and / or charging current currently required by the battery; and charging the battery based on the output voltage and / or output current of the second charging channel.

[0209] Optionally, the wireless charging method further includes: controlling switching between the first charging channel and the second charging channel.

[0210] Optionally, the wireless charging method further includes: performing handshake communication with the transmitting device, and controlling the first charging channel to operate when the handshake communication is successful.

[0211] Optionally, the wireless charging method further includes: performing handshake communication with the transmitting device, and controlling the second charging channel to operate when the handshake communication fails.

[0212] Optionally, the wireless charging method further includes: when the battery voltage is charged to the standard cut-off voltage, charging the battery through multiple charging stages, wherein each charging stage corresponds to a charging current, and the charging current corresponding to the previous charging stage of the adjacent charging stage is greater than the charging current corresponding to the next charging stage, and each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, and the limit voltage is greater than the standard cut-off voltage of the battery; when multiple charging stages are completed, stopping charging the battery.

[0213] Optionally, the wireless charging method further includes: when the battery voltage is charged to the standard cut-off voltage, charging the battery through multiple charging stages, wherein each charging stage corresponds to a charging current, and the charging current corresponding to the previous charging stage of the adjacent charging stage is greater than the charging current corresponding to the next charging stage, and each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, and the limit voltage is greater than the standard cut-off voltage of the battery; constant voltage charging is performed on the battery at the limit voltage, and charging of the battery is stopped when the charging current of the battery reaches the target constant voltage charging cut-off current or the charging time reaches a preset time.

[0214] It is understandable that the wireless charging signal transmitting device can also adjust the transmission power of the wireless transmitting circuit according to the feedback of the charging voltage and / or charging current of the wireless charging signal receiving device in different charging stages, so that the transmission power of the wireless transmitting circuit matches the charging current corresponding to the current charging stage.

[0215] Optionally, the first feedback signal is transmitted using at least one of the following methods: Bluetooth, wireless fidelity, backscatter modulation, short-range wireless communication with high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

[0216] Optionally, the high carrier frequency is 60 GHz.

[0217] Optionally, the optical communication is based on infrared rays.

[0218] Optionally, the mobile communication is performed based on at least one of the following communication protocols: 5G communication protocol, 4G communication protocol and 3G communication protocol.

[0219] Figure 7 1 is a schematic flow chart of a wireless charging method provided in an embodiment of the present application. The method can be applied to a power supply device, such as the power supply device 210 described above. Figure 7 The method includes steps S710-S720.

[0220] S710: Receive a second feedback signal from a transmitting device.

[0221] S720: Adjust the output voltage and / or output current of the power supply device according to the second feedback signal, wherein the second feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit.

[0222] Optionally, the second feedback signal includes a difference between an output current of the wireless receiving circuit and a target value, and the wireless charging method further includes: adjusting an output voltage and / or output current of the power supply device according to the difference between the output current of the wireless receiving circuit and the target value.

[0223] Optionally, the second feedback signal includes adjustment information, and the wireless charging method further includes: adjusting the output voltage and / or output current of the power providing device according to the adjustment information.

[0224] Optionally, the wireless charging method further includes: receiving a fourth feedback signal from the transmitting device; adjusting the output power of the power supply device according to the fourth feedback signal, wherein the fourth feedback signal is a feedback signal corresponding to the charging information of the battery, and the charging information of the battery includes at least one of the following information: charging voltage, charging current, current power and current voltage.

[0225] Optionally, the fourth feedback signal includes charging information of the battery, and the wireless charging method further includes: adjusting the output power of the power supply device according to the charging information of the battery.

[0226] Optionally, the fourth feedback signal includes adjustment information, and the wireless charging method further includes: adjusting the output power of the power providing device according to the adjustment information.

[0227] Optionally, the second feedback signal is transmitted using at least one of the following methods: Bluetooth, wireless fidelity, backscatter modulation, high carrier frequency short-range wireless communication, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

[0228] Optionally, the high carrier frequency is 60 GHz.

[0229] Optionally, the optical communication is based on infrared rays.

[0230] Optionally, the mobile communication is performed based on at least one of the following communication protocols: 5G communication protocol, 4G communication protocol and 3G communication protocol.

[0231] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any other combination. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital video disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0232] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0233] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, 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.

[0234] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0235] 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.

[0236] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A launching device, characterized in that: The transmitting device is connected to the power supply device, and the transmitting device includes: a wireless transmitting circuit, configured to convert the output voltage and output current provided by the power supply device into a wireless charging signal and transmit the wireless charging signal; a communication control circuit, configured to receive a first feedback signal from the wireless charging signal receiving device, and send a second feedback signal to the power supply device according to the first feedback signal; In which, the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit in the receiving device, and the first feedback signal includes the output current of the wireless receiving circuit, or the difference between the output current of the wireless receiving circuit and a target value, wherein the target value refers to a preset maximum value of the output current of the wireless receiving circuit. The second feedback signal is used to trigger the power supply device to adjust the output voltage and / or output current of the power supply device. When the output current of the wireless receiving circuit is higher than the target value, the adjustment amplitude of the output voltage is related to the difference between the output current of the wireless receiving circuit and the target value.

2. The launch device according to claim 1, characterized in that The first feedback signal is used to indicate the difference between the output current of the wireless receiving circuit and the target value, and the communication control circuit is used to determine adjustment information based on the difference between the output current of the wireless receiving circuit and the target value, and send the second feedback signal to the power supply device, where the second feedback signal includes the adjustment information.

3. The launching device according to claim 1 or 2, characterized in that: The first feedback signal and the second feedback signal both include adjustment information, where the adjustment information is used to instruct the power supply device to adjust the output voltage and / or output current of the power supply device.

4. The transmitting device according to any one of claims 1 to 3, characterized in that: The communication control circuit is further configured to receive a third feedback signal from the receiving device, and send a fourth feedback signal to the power supply device according to the third feedback signal; Among them, the third feedback signal is a feedback signal corresponding to the battery charging information, and the battery charging information includes at least one of the following information: charging voltage, charging current, current power and current voltage. The fourth feedback signal is used to trigger the power supply device to adjust the output power of the power supply device.

5. The launching device according to claim 4, characterized in that The third feedback signal includes battery charging information. The communication control circuit is used to determine adjustment information based on the battery charging information and send the fourth feedback signal to the power supply device. The fourth feedback signal includes the adjustment information.

6. The launching device according to claim 4 or 5, characterized in that: The third feedback signal and the fourth feedback signal both include adjustment information, and the adjustment information is used to instruct the power supply device to adjust the output power of the power supply device.

7. The transmitting device according to any one of claims 1 to 6, characterized in that: The transmitting device supports a first wireless charging mode and a second wireless charging mode, wherein a charging speed of the transmitting device for the receiving device in the first wireless charging mode is faster than a charging speed of the transmitting device for the receiving device in the second wireless charging mode.

8. The launching device according to claim 7, characterized in that The communication control circuit is further configured to communicate with the receiving device to negotiate the use of the first wireless charging mode or the second wireless charging mode for wireless charging.

9. The launching device according to claim 7 or 8, characterized in that: The communication control circuit is used to perform handshake communication with the receiving device, and when the handshake communication is successful, control the transmitting device to use the first wireless charging mode to charge the receiving device.

10. The launching device according to claim 7 or 8, characterized in that: The communication control circuit is used to perform handshake communication with the receiving device, and in the event that the handshake communication fails, control the transmitting device to use the second wireless charging mode to charge the receiving device.

11. The transmitting device according to any one of claims 1 to 10, characterized in that: The transmitting device communicates with the power supply device, and the transmitting device communicates with the receiving device in at least one of the following ways: Bluetooth, wireless fidelity, backscatter modulation, high carrier frequency short-range wireless communication, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

12. The launching device according to claim 11, characterized in that The high carrier frequency is 60 GHz.

13. The launching device according to claim 11, characterized in that The optical communication is based on infrared rays.

14. The launching device according to claim 11, characterized in that The mobile communication is performed based on at least one of the following communication protocols: a 5G communication protocol, a 4G communication protocol, and a 3G communication protocol.

15. A receiving device, characterized in that: include: a wireless receiving circuit, configured to receive a wireless charging signal transmitted by a transmitting device and generate an output current of the wireless receiving circuit according to the wireless charging signal; The transmitting device is connected to a power supply device, and the wireless charging signal is converted by the transmitting device according to the output voltage and output current provided by the power supply device; A communication control circuit is configured to detect the output current of the wireless receiving circuit and send a first feedback signal to the transmitting device, where the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit. The first feedback signal is configured to trigger the transmitting device to send a second feedback signal to the power supply device based on the first feedback signal. The first feedback signal includes the output current of the wireless receiving circuit, or the difference between the output current of the wireless receiving circuit and a target value, wherein the target value refers to a preset maximum value of the output current of the wireless receiving circuit. The second feedback signal is configured to trigger the power supply device to adjust the output voltage and / or output current of the power supply device. When the output current of the wireless receiving circuit is higher than the target value, the adjustment amplitude of the output voltage is related to the difference between the output current of the wireless receiving circuit and the target value.

16. The receiving device according to claim 15, characterized in that The first feedback signal is used to indicate a difference between an output current of the wireless receiving circuit and a target value.

17. The receiving device according to claim 15 or 16, characterized in that The first feedback signal includes adjustment information, and the adjustment information is used to instruct the transmitting device to adjust the magnitude of the voltage and / or current corresponding to the transmission power.

18. The receiving device according to any one of claims 15 to 17, characterized in that: The output current of the wireless receiving circuit is used to charge the battery; The communication control circuit is further configured to detect charging information of the battery and send a third feedback signal to the transmitting device; Among them, the third feedback signal is a feedback signal corresponding to the charging information of the battery, and the third feedback signal is used to trigger the transmitting device to adjust the transmission power of the wireless charging signal. The charging information of the battery includes at least one of the following information: charging voltage, charging current, current power and current voltage.

19. The receiving device according to claim 18, wherein The third feedback signal includes adjustment information, and the adjustment information is used to instruct the transmitting device to adjust the transmit power.

20. The receiving device according to claim 18 or 19, characterized in that The receiving device further includes: The first charging channel is used to charge the battery according to the output current of the wireless receiving circuit.

21. The receiving device according to claim 20, wherein: The first charging channel is provided with a voltage conversion circuit.

22. The receiving device according to claim 21, wherein The voltage conversion circuit is a Buck circuit, a Boost circuit, a charge pump or a charge management circuit.

23. The receiving device according to any one of claims 20 to 22, characterized in that: The receiving device further includes: A second charging channel is provided with a conversion circuit, which is used to receive the output voltage and output current of the wireless receiving circuit, and perform constant voltage and / or constant current control on the output voltage and / or output current of the wireless receiving circuit, so that the output voltage and / or output current of the second charging channel match the charging voltage and / or charging current currently required by the battery, and charge the battery based on the output voltage and / or output current of the second charging channel.

24. The receiving device according to claim 23, wherein: The communication control circuit is further configured to control switching between the first charging channel and the second charging channel.

25. The receiving device according to claim 24, characterized in that The communication control circuit is further configured to perform handshake communication with the transmitting device, and control the first charging channel to operate if the handshake communication is successful.

26. The receiving device according to claim 24, characterized in that The communication control circuit is further configured to perform handshake communication with the transmitting device, and control the second charging channel to operate if the handshake communication fails.

27. The receiving device according to any one of claims 15 to 26, characterized in that: The receiving device includes a plurality of battery cells connected in series.

28. The receiving device according to claim 27, wherein: The receiving device further includes a balancing circuit, and the balancing circuit is used to balance the voltages of the multiple battery cells.

29. The receiving device according to any one of claims 15 to 28, characterized in that: The communication control circuit is configured to charge the battery through a plurality of charging stages when the battery voltage reaches a standard cut-off voltage, wherein each charging stage corresponds to a charging current, and the charging current corresponding to the preceding charging stage is greater than the charging current corresponding to the succeeding charging stage. Each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, wherein the limit voltage is greater than the standard cut-off voltage of the battery; The communication control circuit is further configured to stop charging the battery after a plurality of charging stages are completed.

30. The receiving device according to any one of claims 15 to 29, characterized in that: The communication control circuit is configured to charge the battery through a plurality of charging stages when the battery voltage reaches a standard cut-off voltage, wherein each charging stage corresponds to a charging current, and the charging current corresponding to the preceding charging stage is greater than the charging current corresponding to the succeeding charging stage. Each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, wherein the limit voltage is greater than the standard cut-off voltage of the battery; The communication control circuit is further configured to perform constant voltage charging on the battery at the limited voltage, and stop charging the battery when the charging current of the battery reaches a target constant voltage charging cutoff current or the charging time reaches a preset time.

31. The receiving device according to any one of claims 15 to 30, characterized in that: The communication control circuit communicates with the transmitting device in at least one of the following ways: Bluetooth, wireless fidelity, backscatter modulation, short-range wireless communication with high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

32. The receiving device according to claim 31, wherein The high carrier frequency is 60 GHz.

33. The receiving device according to claim 31, wherein: The optical communication is based on infrared rays.

34. The receiving device according to claim 31, wherein The mobile communication is performed based on at least one of the following communication protocols: a 5G communication protocol, a 4G communication protocol, and a 3G communication protocol.

35. A power supply device, characterized in that: The power supply device is connected to the transmitting device, and the power supply device includes: a communication control circuit, configured to receive a second feedback signal sent by the transmitting device, adjust the output voltage and / or output current of the power supply device according to the second feedback signal, and provide the output voltage and output current to the wireless transmitting circuit of the transmitting device, so that the transmitting circuit converts the output voltage and output current provided by the power supply device into a wireless charging signal, and transmits the wireless charging signal; The second feedback signal is sent by the transmitting device to the power supply device based on the first feedback signal. The first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit in the receiving device of the wireless charging signal. The first feedback signal includes the output current of the wireless receiving circuit, or the difference between the output current of the wireless receiving circuit and a target value. The target value refers to the preset maximum value of the output current of the wireless receiving circuit. When the output current of the wireless receiving circuit is higher than the target value, the adjustment amplitude of the output voltage is related to the difference between the output current of the wireless receiving circuit and the target value.

36. The power supply device according to claim 35, characterized in that: The second feedback signal includes a difference between an output current of the wireless receiving circuit and a target value, and the communication control circuit is used to adjust the output voltage and / or output current of the power supply device according to the difference between the output current of the wireless receiving circuit and the target value.

37. The power supply device according to claim 35, wherein: The second feedback signal includes adjustment information, and the communication control circuit is used to adjust the output voltage and / or output current of the power supply device according to the adjustment information.

38. The power supply device according to any one of claims 35 to 37, characterized in that: The communication control circuit is also used to receive a fourth feedback signal from the transmitting device and adjust the output power of the power supply device according to the fourth feedback signal, wherein the fourth feedback signal is a feedback signal corresponding to the charging information of the battery, and the charging information of the battery includes at least one of the following information: charging voltage, charging current, current power and current voltage.

39. The power supply device according to claim 38, wherein: The fourth feedback signal includes charging information of the battery, and the communication control circuit is used to adjust the output power of the power supply device according to the charging information of the battery.

40. The power supply device according to claim 38, wherein: The fourth feedback signal includes adjustment information, and the communication control circuit is used to adjust the output power of the power supply device according to the adjustment information.

41. The power supply device according to any one of claims 38 to 40, characterized in that: The power supply device communicates with the transmitting device in at least one of the following ways: Bluetooth, wireless fidelity, backscatter modulation, high carrier frequency short-range wireless communication, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

42. The power supply device according to claim 41, wherein: The high carrier frequency is 60 GHz.

43. The power supply device according to claim 41, wherein: The optical communication is based on infrared rays.

44. The power supply device according to claim 41, wherein: The mobile communication is performed based on at least one of the following communication protocols: a 5G communication protocol, a 4G communication protocol, and a 3G communication protocol.

45. A wireless charging method, characterized in that: Applied to a transmitting device, the transmitting device is connected to a power supply device, and the method includes: Converting the output voltage and output current provided by the power supply device into a wireless charging signal, and transmitting the wireless charging signal; receiving a first feedback signal from the wireless charging signal receiving device, and sending a second feedback signal to a power supply device according to the first feedback signal; In which, the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit in the receiving device, and the first feedback signal includes the output current of the wireless receiving circuit, or the difference between the output current of the wireless receiving circuit and a target value, wherein the target value refers to a preset maximum value of the output current of the wireless receiving circuit. The second feedback signal is used to trigger the power supply device to adjust the output voltage and / or output current of the power supply device. When the output current of the wireless receiving circuit is higher than the target value, the adjustment amplitude of the output voltage is related to the difference between the output current of the wireless receiving circuit and the target value.

46. ​​The wireless charging method according to claim 45, wherein: The first feedback signal is used to indicate a difference between an output current of the wireless receiving circuit and a target value. The wireless charging method further includes: determining adjustment information according to a difference between an output current of the wireless receiving circuit and a target value; The second feedback signal is sent to the power supply device, where the second feedback signal includes adjustment information.

47. The wireless charging method according to claim 45 or 46, characterized in that: The first feedback signal and the second feedback signal both include adjustment information, where the adjustment information is used to instruct the power supply device to adjust the output voltage and / or output current of the power supply device.

48. The wireless charging method according to any one of claims 45 to 47, wherein: The wireless charging method further includes: receiving a third feedback signal from the receiving device; sending a fourth feedback signal to the power supply device according to the third feedback signal; Among them, the third feedback signal is a feedback signal corresponding to the battery charging information, and the battery charging information includes at least one of the following information: charging voltage, charging current, current power and current voltage. The fourth feedback signal is used to trigger the power supply device to adjust the output power of the power supply device.

49. The wireless charging method according to claim 48, wherein: The third feedback signal includes battery charging information, and the wireless charging method further includes: determining adjustment information according to charging information of the battery; The fourth feedback signal is sent to the power supply device, where the fourth feedback signal includes adjustment information.

50. The wireless charging method according to claim 48 or 49, wherein: The third feedback signal and the fourth feedback signal both include adjustment information, and the adjustment information is used to instruct the power supply device to adjust the output power of the power supply device.

51. The wireless charging method according to any one of claims 45 to 50, wherein: The wireless charging method is applied to a transmitting device, which supports a first wireless charging mode and a second wireless charging mode, wherein the transmitting device charges the receiving device faster in the first wireless charging mode than in the second wireless charging mode.

52. The wireless charging method according to claim 51, wherein: The wireless charging method further includes: Communicate with the receiving device to negotiate using the first wireless charging mode or the second wireless charging mode for wireless charging.

53. The wireless charging method according to claim 51 or 52, characterized in that: The wireless charging method further includes: Performing handshake communication with the receiving device; When the handshake communication is successful, the transmitting device is controlled to charge the receiving device using the first wireless charging mode.

54. The wireless charging method according to claim 51 or 52, wherein: The wireless charging method further includes: Performing handshake communication with the receiving device; In the event that the handshake communication fails, the transmitting device is controlled to charge the receiving device using the second wireless charging mode.

55. The wireless charging method according to any one of claims 45 to 54, wherein: The first feedback signal and the second feedback signal are transmitted in at least one of the following ways: Bluetooth, wireless fidelity, backscatter modulation, high carrier frequency short-range wireless communication, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

56. The wireless charging method according to claim 55, wherein: The high carrier frequency is 60 GHz.

57. The wireless charging method according to claim 55, wherein: The optical communication is based on infrared rays.

58. The wireless charging method according to claim 55, wherein: The mobile communication is performed based on at least one of the following communication protocols: a 5G communication protocol, a 4G communication protocol, and a 3G communication protocol.

59. A wireless charging method, characterized in that: Applied to a receiving device, the method includes: receiving a wireless charging signal transmitted by a transmitter, the transmitter being connected to a power supply device, the wireless charging signal being generated by the transmitter according to an output voltage and an output current provided by the power supply device; generating an output current of a wireless receiving circuit according to the wireless charging signal; Detecting the output current of the wireless receiving circuit and sending a first feedback signal to the transmitting device, wherein the first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit, and the first feedback signal is used to trigger the transmitting device to send a second feedback signal to the power supply device according to the first feedback signal, and the first feedback signal includes the output current of the wireless receiving circuit, or the difference between the output current of the wireless receiving circuit and a target value, wherein the target value refers to a preset maximum value of the output current of the wireless receiving circuit, and the second feedback signal is used to trigger the power supply device to adjust the output voltage and / or output current of the power supply device. When the output current of the wireless receiving circuit is higher than the target value, the adjustment amplitude of the output voltage is related to the difference between the output current of the wireless receiving circuit and the target value.

60. The wireless charging method according to claim 59, wherein: The first feedback signal is used to indicate a difference between an output current of the wireless receiving circuit and a target value.

61. The wireless charging method according to claim 59 or 60, characterized in that: The first feedback signal includes adjustment information, and the adjustment information is used to instruct the transmitting device to adjust the magnitude of the voltage and / or current corresponding to the transmission power.

62. The wireless charging method according to any one of claims 59 to 61, wherein: The output current of the wireless receiving circuit is used to charge the battery, and the wireless charging method further includes: Detecting charging information of the battery and sending a third feedback signal to the transmitting device, wherein the third feedback signal is a feedback signal corresponding to the charging information of the battery, and the third feedback signal is used to trigger the transmitting device to adjust the transmission power of the wireless charging signal, and the charging information of the battery includes at least one of the following information: charging voltage, charging current, current power and current voltage.

63. The wireless charging method according to claim 62, wherein: The third feedback signal includes adjustment information, and the adjustment information is used to instruct the transmitting device to adjust the transmit power.

64. The wireless charging method according to claim 62 or 63, characterized in that: The wireless charging method further includes: The battery is charged using a first charging channel according to the output current of the wireless receiving circuit.

65. The wireless charging method according to claim 64, wherein: The first charging channel is provided with a voltage conversion circuit.

66. The wireless charging method according to claim 65, wherein: The voltage conversion circuit is a Buck circuit, a Boost circuit, a charge pump or a charge management circuit.

67. The wireless charging method according to any one of claims 64-66, characterized in that: The wireless charging method further includes: using a conversion circuit on a second charging channel to receive the output voltage and output current of the wireless receiving circuit, and performing constant voltage and / or constant current control on the output voltage and / or output current of the wireless receiving circuit, so that the output voltage and / or output current of the second charging channel matches the charging voltage and / or charging current currently required by the battery; The battery is charged based on the output voltage and / or output current of the second charging channel.

68. The wireless charging method according to claim 67, wherein: The wireless charging method further includes: Control switching between the first charging channel and the second charging channel.

69. The wireless charging method according to claim 68, wherein: The wireless charging method further includes: Perform handshake communication with the transmitting device, and control the first charging channel to operate if the handshake communication is successful.

70. The wireless charging method according to claim 68, wherein: The wireless charging method further includes: Perform handshake communication with the transmitting device, and control the second charging channel to operate if the handshake communication fails.

71. The wireless charging method according to any one of claims 59 to 70, wherein: The wireless charging method further includes: When the battery voltage reaches the standard cut-off voltage, the battery is charged through multiple charging stages, wherein each charging stage corresponds to a charging current, and the charging current corresponding to the preceding charging stage is greater than the charging current corresponding to the succeeding charging stage. Each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, wherein the limit voltage is greater than the standard cut-off voltage of the battery; When the plurality of charging stages are completed, charging of the battery is stopped.

72. The wireless charging method according to any one of claims 59-70, characterized in that: The wireless charging method further includes: When the battery voltage reaches the standard cut-off voltage, the battery is charged through multiple charging stages, wherein each charging stage corresponds to a charging current, and the charging current corresponding to the preceding charging stage is greater than the charging current corresponding to the succeeding charging stage. Each charging stage uses its corresponding charging current to charge the battery voltage to a limit voltage, wherein the limit voltage is greater than the standard cut-off voltage of the battery; The battery is charged at a constant voltage with the limited voltage, and charging of the battery is stopped when the charging current of the battery reaches a target constant voltage charging cut-off current or the charging time reaches a preset time.

73. The wireless charging method according to any one of claims 59-70, characterized in that: The first feedback signal is transmitted in at least one of the following ways: Bluetooth, wireless fidelity, backscatter modulation, short-range wireless communication with high carrier frequency, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

74. The wireless charging method according to claim 73, wherein: The high carrier frequency is 60 GHz.

75. The wireless charging method according to claim 73, wherein: The optical communication is based on infrared rays.

76. The wireless charging method according to claim 73, wherein: The mobile communication is performed based on at least one of the following communication protocols: a 5G communication protocol, a 4G communication protocol, and a 3G communication protocol.

77. A wireless charging method, characterized in that: Applied to a power supply device, the power supply device is connected to a transmitting device, and the method includes: receiving a second feedback signal sent by the transmitting device; adjusting the output voltage and / or output current of the power supply device according to the second feedback signal, and providing the output voltage and output current to the wireless transmitting circuit of the transmitting device so that the transmitting circuit converts the output voltage and output current provided by the power supply device into a wireless charging signal, and transmits the wireless charging signal; The second feedback signal is generated by the transmitting device based on the first feedback signal sent by the wireless charging signal receiving device. The first feedback signal is a feedback signal corresponding to the output current of the wireless receiving circuit in the wireless charging signal receiving device. The first feedback signal includes the output current of the wireless receiving circuit, or the difference between the output current of the wireless receiving circuit and a target value. The target value refers to a preset maximum value of the output current of the wireless receiving circuit. When the output current of the wireless receiving circuit is higher than the target value, the adjustment amplitude of the output voltage is related to the difference between the output current of the wireless receiving circuit and the target value.

78. The wireless charging method according to claim 77, wherein: The second feedback signal includes a difference between an output current of the wireless receiving circuit and a target value. The wireless charging method further includes: The output voltage and / or output current of the power supply device is adjusted according to a difference between the output current of the wireless receiving circuit and a target value.

79. The wireless charging method according to claim 77, wherein: The second feedback signal includes adjustment information, and the wireless charging method further includes: The output voltage and / or output current of the power supply device is adjusted according to the adjustment information.

80. The wireless charging method according to any one of claims 77 to 79, wherein: The wireless charging method further includes: receiving a fourth feedback signal from the transmitting device; Adjust the output power of the power supply device according to the fourth feedback signal, wherein the fourth feedback signal is a feedback signal corresponding to the charging information of the battery, and the charging information of the battery includes at least one of the following information: charging voltage, charging current, current power and current voltage.

81. The wireless charging method according to claim 80, wherein: The fourth feedback signal includes charging information of the battery, and the wireless charging method further includes: The output power of the power supply device is adjusted according to the charging information of the battery.

82. The wireless charging method according to claim 80, wherein: The fourth feedback signal includes adjustment information, and the wireless charging method further includes: The output power of the power supply device is adjusted according to the adjustment information.

83. The wireless charging method according to any one of claims 80 to 82, characterized in that: The second feedback signal is transmitted in at least one of the following ways: Bluetooth, wireless fidelity, backscatter modulation, high carrier frequency short-range wireless communication, optical communication, ultrasonic communication, ultra-wideband communication, mobile communication and data interface.

84. The wireless charging method according to claim 83, wherein: The high carrier frequency is 60 GHz.

85. The wireless charging method according to claim 83, wherein: The optical communication is based on infrared rays.

86. The wireless charging method according to claim 83, wherein: The mobile communication is performed based on at least one of the following communication protocols: a 5G communication protocol, a 4G communication protocol, and a 3G communication protocol.

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