Wireless charging control method and electronic equipment

Abstract

The invention provides a wireless charging control method and electronic equipment, relates to the technical field of electronic equipment, and aims to solve the problem that the electronic equipment is easy to stop charging too early when the local temperature of the electronic equipment is too high due to wireless charging. A wireless charging control method is applied to an electronic device. The electronic equipment comprises a circuit board, a charging coil and a battery, a plurality of electronic devices are arranged on the circuit board, the charging coil and the plurality of electronic devices are connected together to form a charging circuit, and the charging circuit is used for charging the battery; the method comprises the following steps: acquiring a difference value between the temperature of a circuit board and the temperature of a charging coil; when the difference value indicates that the temperature at the circuit board is greater than the temperature at the charging coil, reducing the voltage on the charging coil; alternatively, when the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage on the charging coil is increased.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic devices, and in particular to a wireless charging control method and electronic device. Background Art

[0002] With the development of electronic devices, they can now include wireless charging capabilities, allowing users to charge their electronic devices. Wireless charging requires the electronic device to be equipped with a charging coil. When charging an electronic device using wireless charging, the charging coil generates heat, and due to the coupling effect of the charging coil, the circuit boards within the electronic device also heat up.

[0003] However, when the local temperature of an electronic device is too high due to wireless charging, it is easy for the electronic device to stop charging prematurely. Summary of the Invention

[0004] Embodiments of the present application provide a wireless charging control method and an electronic device, which are used to improve the problem that when the local temperature of the electronic device is too high due to wireless charging, the electronic device may easily stop charging prematurely.

[0005] The embodiments of the present application provide a wireless charging control method and a wireless charging system for electronic devices, which are used to improve the problem that the local temperature of the electronic device is too high during wireless charging, which easily causes the electronic device to stop charging prematurely.

[0006] In a first aspect, the present application provides a wireless charging control method. The wireless charging method can be applied to electronic devices. The electronic device may include a circuit board, a charging coil, and a battery, and a plurality of electronic devices may be provided on the circuit board. The charging coil may be connected to the plurality of electronic devices to form a charging circuit. The charging circuit can be used to charge the battery. The wireless charging method first obtains the difference between the temperature at the circuit board and the temperature at the charging coil. Based on the temperature at the circuit board and the temperature at the charging coil, the following two situations may be encountered during the application of the wireless charging method: the temperature at the circuit board is greater than the temperature at the charging coil, or the temperature at the circuit board is less than the temperature at the charging coil.

[0007] The temperature at the circuit board and the temperature at the charging coil can be reflected based on the difference between the two.

[0008] When the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, the voltage at the charging coil is reduced. This reduces the coupling between the charging coil and the wiring on the circuit board, thereby reducing eddy current losses. This in turn reduces the rate of temperature rise on the circuit board, bringing the temperature there closer to that of the charging coil. This delays the time it takes for the circuit board to reach the shutdown temperature, preventing the electronic device from stopping charging prematurely.

[0009] Unlike the above situation, when the difference indicates that the temperature at the circuit board is lower than the temperature at the charging coil, the voltage on the charging coil is increased. Increasing the voltage on the charging coil increases the coupling between the charging coil and the wiring on the circuit board, thereby increasing eddy current losses and, in turn, increasing the rate of temperature rise on the circuit board, bringing the temperature there closer to that of the charging coil, thus preventing the electronic device from stopping charging prematurely.

[0010] In a possible implementation of the first aspect, when the temperature at the circuit board and the temperature at the charging coil are both greater than a first temperature threshold, and when the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, the voltage on the charging coil is reduced; or when the temperature at the circuit board and the temperature at the charging coil are both greater than the first temperature threshold, and when the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage on the charging coil is increased.

[0011] In this way, when the temperature at the circuit board and the temperature at the charging coil are lower than the first temperature threshold, the processor does not adjust the voltage on the charging coil even if there is a difference between the temperature at the circuit board and the temperature at the charging coil, thereby avoiding the processor adjusting the voltage on the charging coil too frequently, which may increase the power consumption of the processor, and the frequent adjustment of the voltage on the charging coil may increase the instability of the charging process.

[0012] In another possible implementation of the first aspect, when the temperature at the circuit board and the temperature at the charging coil are both greater than a first temperature threshold, and when the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, the voltage on the charging coil is reduced and the current on the charging coil is increased; or, when the temperature at the circuit board and the temperature at the charging coil are both greater than the first temperature threshold, and when the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage on the charging coil is increased and the current on the charging coil is reduced.

[0013] In this way, the temperature at the circuit board can be made close to the temperature at the charging coil, which prolongs the time it takes for the temperatures at the circuit board and the charging coil to reach the stop temperature, thus preventing the electronic device from stopping charging too early while keeping the charging power of the charging circuit to the battery unchanged.

[0014] In another possible implementation of the first aspect, when the temperature at the circuit board and the temperature at the charging coil are both greater than a first temperature threshold, the absolute value of the difference between the temperature at the circuit board and the temperature at the charging coil is greater than the difference threshold, and when the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, the voltage on the charging coil is reduced and the current on the charging coil is increased; or, when the temperature at the circuit board and the temperature at the charging coil are both greater than the first temperature threshold, the absolute value of the difference between the temperature at the circuit board and the temperature at the charging coil is greater than the difference threshold, and when the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage on the charging coil is increased and the current on the charging coil is reduced.

[0015] In this way, even if the temperature at the circuit board and the temperature at the charging coil are both greater than the first temperature threshold, but the temperature difference between the two is less than the difference threshold, the processor will not adjust the voltage on the charging coil, thereby further avoiding the processor from frequently adjusting the voltage on the charging coil, reducing the power consumption of the processor, and ensuring stability during the charging process.

[0016] In another possible implementation of the first aspect, when the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, the voltage on the charging coil is reduced and the current on the charging coil is increased; or, when the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage on the charging coil is increased and the current on the charging coil is reduced.

[0017] In this way, the temperature at the circuit board can be made close to the temperature at the charging coil, which prolongs the time it takes for the temperatures at the circuit board and the charging coil to reach the stop temperature, thus preventing the electronic device from stopping charging too early while keeping the charging power of the charging circuit to the battery unchanged.

[0018] In another possible implementation of the first aspect, when the absolute value of the difference between the temperature at the circuit board and the temperature at the charging coil is greater than a difference threshold, and when the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, the voltage on the charging coil is reduced; or, when the absolute value of the difference between the temperature at the circuit board and the temperature at the charging coil is greater than the difference threshold, and when the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage on the charging coil is increased.

[0019] In this way, even when the temperature at the circuit board and the temperature at the charging coil are relatively low, such as less than the first temperature threshold, as long as the absolute value of the difference between the temperature at the circuit board and the temperature at the charging coil is greater than the difference threshold, the processor will adjust the voltage on the charging coil, thereby reducing the difference in the rate of increase of the temperature at the circuit board and the temperature at the charging coil during the entire charging process.

[0020] In another possible implementation of the first aspect, the wireless charging control method further includes: when at least one of the temperature at the circuit board and the temperature at the charging coil is greater than a second temperature threshold, the charging circuit stops charging the battery; the second temperature threshold is greater than the first temperature threshold.

[0021] In this way, the user can be protected from being affected by the local temperature of the electronic device being too high when using the electronic device.

[0022] In another possible implementation of the first aspect, the electronic device may further include a housing. The housing has a receiving cavity. The circuit board, the charging coil, and the battery may be located within the receiving cavity. The wireless charging control method may further include:

[0023] The temperature of the housing is obtained according to the temperature of the circuit board and the temperature of the charging coil; when the temperature of the housing is greater than a second temperature threshold, the charging circuit stops charging the battery.

[0024] In this way, the temperature of the housing can be obtained based on the temperature of the circuit board and the temperature of the charging coil, preventing the temperature of the housing from being too high and affecting user use.

[0025] In a second aspect, the present application provides an electronic device. The electronic device includes a processor, a circuit board, a charging coil, and a battery. The circuit board may be provided with multiple electronic components. The charging coil and the multiple electronic components may form a charging circuit. The charging circuit is used to charge the battery.

[0026] When the temperature of the circuit board is greater than the temperature of the charging coil, the processor reduces the voltage of the charging coil. Alternatively, when the temperature of the circuit board is less than the temperature of the charging coil, the processor increases the voltage of the charging coil.

[0027] When the processor senses that the temperature at the circuit board is greater than the temperature at the charging coil, the processor reduces the voltage on the charging coil by controlling the duty cycle of the switching device inside the rectifier unit, thereby reducing the coupling between the charging coil and the wiring on the circuit board, thereby reducing eddy current loss, and further reducing the rate of increase of the temperature at the circuit board, making the temperature at the circuit board close to the temperature at the charging coil, extending the time it takes for the temperature at the circuit board to reach the stop temperature, and preventing the electronic device from stopping charging too early.

[0028] When the processor senses through the temperature sensor that the temperature at the circuit board is lower than the temperature at the charging coil, the processor increases the voltage on the charging coil by controlling the duty cycle of the switching device inside the rectifier unit, thereby increasing the coupling between the charging coil and the wiring on the circuit board, thereby increasing the eddy current loss, and further increasing the rate of temperature rise at the circuit board, making the temperature at the circuit board close to the temperature at the charging coil, thereby preventing the electronic device from stopping charging too early.

[0029] In one possible implementation of the second aspect, the charging circuit may include a rectifier unit and a transformer unit. The rectifier unit may be coupled to the charging coil and may also be coupled to the battery. The rectifier unit may be used to provide current to the battery, and the processor may adjust the voltage on the charging coil via the rectifier unit. The transformer unit may be coupled to the rectifier unit and may also be coupled to the battery. The transformer unit may charge the battery based on the current provided by the rectifier unit. When the processor adjusts the voltage on the charging coil based on the temperature of the circuit board and the temperature of the charging coil, the current output by the transformer unit to the battery remains constant.

[0030] In this way, the temperature at the circuit board can be made close to the temperature at the charging coil, which prolongs the time it takes for the temperatures at the circuit board and the charging coil to reach the stop temperature, thus preventing the electronic device from stopping charging too early while keeping the charging power of the charging circuit to the battery unchanged.

[0031] In a third aspect, an embodiment of the present application provides an electronic device, comprising a display screen, a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method in any one of the embodiments of the first aspect.

[0032] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the method in any one of the embodiments of the first aspect.

[0033] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the steps of the method in any one of the embodiments of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic structural diagram of a watch provided for some embodiments of the present application;

[0035] Figure 2a A schematic diagram of the structure of a watch provided in some embodiments of the present application;

[0036] Figure 2b A schematic diagram of the structure of a watch provided in some embodiments of the present application;

[0037] Figure 3 for Figure 2a Schematic diagram of the location of the temperature sensor, circuit board, and charging coil;

[0038] Figure 4 for Figure 2a A structural diagram of the charging circuit;

[0039] Figure 5a for Figure 4 The charging circuit shown is a schematic diagram of temperature changes when the battery is charging;

[0040] Figure 5b for Figure 4 The charging circuit shown is a schematic diagram of current changes when the battery is charging;

[0041] Figure 6 A schematic diagram of a charging circuit provided in another embodiment of the present application;

[0042] Figure 7 for Figure 6 The process diagram of the charging circuit shown;

[0043] Figure 8 A flowchart of a wireless charging control method provided in one embodiment of the present application;

[0044] Figure 9 A flowchart of a wireless charging control method provided in another embodiment of the present application is shown. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0046] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0047] In addition, in this application, directional terms such as "up", "down", "left", and "right" may be defined including but not limited to the orientation relative to the schematic placement of the components in the drawings. It should be understood that these directional terms may be relative concepts. They are used for relative descriptions and clarifications, and they may change accordingly according to changes in the orientation of the components in the drawings.

[0048] In this application, unless otherwise specified or limited, the term "connection" should be understood broadly. For example, "connection" can mean fixed connection, detachable connection, or integration; it can mean direct connection or indirect connection through an intermediate medium. In addition, the term "coupling" can refer to the manner in which electrical connection is achieved for signal transmission.

[0049] In the present application, the control electrode of each transistor used is the gate of the transistor, the first electrode is one of the source and drain of the transistor, and the second electrode is the other of the source and drain of the transistor. Since the source and drain of the transistor can be symmetrical in structure, the source and drain can be structurally indistinguishable. That is, the first electrode and the second electrode of the transistor in the embodiments of the present disclosure can be structurally indistinguishable. For example, in the case where the transistor is a P-type transistor, the first electrode of the transistor is the source and the second electrode is the drain; for example, in the case where the transistor is an N-type transistor, the first electrode of the transistor is the drain and the second electrode is the source.

[0050] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0051] In the embodiments of this application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a concrete manner.

[0052] An embodiment of the present application provides an electronic device. The electronic device may include, but is not limited to, a portable electronic device with a wireless charging function, such as a laptop computer, a mobile phone, a smart phone, a tablet computer, an intelligent vehicle-mounted device, a navigator, an artificial intelligence device, a wearable device (such as a watch, a bracelet, a ring, etc.), or a virtual reality / augmented reality / mixed reality device, etc. The above-mentioned electronic device may also be an electronic product such as a household appliance (such as a sweeping robot, etc.), a drone, etc. For ease of understanding, the following description will be taken as an example of a scenario in which the electronic device includes a watch.

[0053] Figure 1 A schematic structural diagram of a watch 1 provided for some embodiments of the present application.

[0054] like Figure 1 As shown, the watch 1 may include a processor 10 , a display screen 20 , a power management module 40 , a memory 50 , and a battery 60 .

[0055] The processor 10 may include one or more processing units, for example, an application processing unit (AP), a modem processing unit, a graphics processing unit (GPU), an image signal processing unit (ISP), a control unit, a video codec unit, a digital signal processing unit (DSP), a baseband processing unit, and / or a neural-network processing unit (NPU). The different processing units may be independent devices or integrated into one or more processors 10. The control unit may generate an operation control signal based on an instruction opcode and a timing signal to control instruction fetching and execution.

[0056] In some embodiments, the processor 10 can communicate with the memory 50, the display 20, and the power management module 40 via a bus. The processor 10 may include interfaces required to implement corresponding bus communications. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, etc.

[0057] The I2C interface is a bidirectional synchronous serial bus interface that includes a serial data line (SDL) and a serial clock line (SCL). In some embodiments, processor 10 may include multiple I2C bus lines. Processor 10 can be coupled to a touch sensor, a charger, a flash, a camera, etc. via different I2C bus interfaces. For example, processor 10 can be coupled to a touch sensor via an I2C interface, enabling communication between processor 10 and the touch sensor via the I2C bus interface, thereby implementing touch functionality in the electronic device.

[0058] The UART interface is a universal serial data bus interface used for asynchronous communication. This bus is a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, the UART interface is generally used to connect the processor 10 and the communication module. For example, the processor 10 communicates with the Bluetooth module via the UART interface to implement Bluetooth functionality. In some embodiments, the audio module can transmit audio signals to the communication module via the UART interface, enabling the function of playing music through Bluetooth headphones.

[0059] The MIPI interface can be used to connect the processor 10 to peripheral devices such as the display screen 20. MIPI interfaces include the camera serial interface (CSI) and the display serial interface (DSI). In some embodiments, the processor 10 and the display screen 20 communicate via the DSI interface to implement the display function of the electronic device.

[0060] The GPIO interface can be configured through software. The GPIO interface can be configured to transmit control signals or data signals. In some embodiments, the GPIO interface can be used to connect the processor 10 to the display screen 20, a communication module, an audio module, a sensor module, etc. The GPIO interface can also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, etc.

[0061] The memory 50 can be used to store computer executable program code, and the executable program code may include instructions. The memory 50 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system 51, a computer program 52 required for at least one function (such as a sound playback function, an image playback function), etc. The data storage area can store data created during the use of the electronic device (such as audio data, a phone book), etc. In addition, the memory 50 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 10 can execute various functional applications and data processing of the electronic device by running instructions stored in the memory 50, and / or instructions stored in a storage unit provided in the processor 10.

[0062] The power management module 40 is used to connect the battery 60 to the processor 10. The power management module 40 receives input from the battery 60 and provides power to the processor 10, the memory 50, the display 20, and the like. The power management module 40 can also be used to monitor parameters such as battery capacity, battery cycle count, battery health status (leakage, impedance), and battery charging power. In some embodiments, the power management module 40 can also be provided in the processor 10.

[0063] The display screen 20 can be used to display images, videos, etc. For example, the display screen 20 can display an incoming call reminder interface and a voice call interface. The display screen 20 may include a display panel. The display panel may be an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), etc. In some embodiments, the electronic device may include 1 or N display screens, where N is a positive integer greater than 1.

[0064] Figure 2a This is a schematic structural diagram of the watch 1 in some embodiments of the present application. Figure 2b This is a schematic structural diagram of the watch 1 in some embodiments of the present application. Figure 3 for Figure 2a Schematic diagram of the location of the temperature sensor, circuit board, and charging coil.

[0065] like Figure 2a and Figure 2b As shown, the watch 1 may further include a housing 30, a circuit board 70, and a charging coil 80. The housing 30 may have a receiving cavity, and the circuit board 70 and charging coil 80 may be located within the receiving cavity. The circuit board 70 may be provided with multiple electronic components. These multiple electronic components may include a processor 10, a power management module 40, a memory 50, resistors, capacitors, switching devices, and a chip for implementing the heart rate monitoring function of the watch 1. The resistors, capacitors, and switching devices may constitute a step-down chopper circuit, a rectifier circuit, and the like. The step-down chopper circuit and the rectifier circuit may form a charging circuit 100 together with the charging coil 80. The charging circuit 100 may be used to charge the battery 60 under the control of the processor 10. For example, the rectifier circuit in the charging circuit 100 may convert the AC voltage on the charging coil 80 into a DC voltage, and the step-down chopper circuit may transform the converted voltage of the rectifier circuit and output it to the battery for charging.

[0066] like Figure 3 As shown, the watch 1 may also include multiple temperature sensors. These multiple temperature sensors may be disposed within the receiving cavity. These multiple temperature sensors may be used to sense the temperature at relevant locations on the watch 1. For example, the multiple temperature sensors may include a first temperature sensor NTC1 disposed on the circuit board 70 and a second temperature sensor NTC2 disposed on the charging coil 80. The processor 10 may sense the temperature at the circuit board 70 via the first temperature sensor NTC1. The processor 10 may sense the temperature at the charging coil 80 via the second temperature sensor NTC2.

[0067] When the battery 60 is charged through the charging circuit 100, the charging coil 80 generates heat due to coil losses, and the temperature at the charging coil 80 continues to rise. Furthermore, due to the coupling effect of the magnetic field on the charging coil 80, eddy current losses are generated on the circuit board 70 due to the wiring, causing the circuit board 70 to heat up and the temperature at the circuit board 70 to continue to rise. This combined heating can easily cause the temperature of a localized portion of the watch 1 (such as the back cover that contacts the user's skin) to rise. However, excessively high temperatures in a localized portion of the watch 1 pose a risk of burns when the user wears the watch after charging. To improve user safety, the watch 1 stops charging when the temperature of a localized portion reaches a certain temperature. This temperature at which the watch 1 stops charging is defined as the stop-charging temperature. Therefore, if the temperature of the circuit board 70 is too high (reaching the stop-charging temperature) but the temperature of the charging coil 80 is low, the watch 1 stops charging. Alternatively, if the temperature of the circuit board 70 is low but the temperature of the charging coil 80 is too high, the watch 1 stops charging. In both cases, the charging time will be shorter than when the temperature at the circuit board 70 and the temperature at the charging coil 80 both reach the stop-charging temperature, thus causing the problem of slow charging.

[0068] Figure 4 for Figure 2a A structural diagram of the charging circuit 100 is shown in FIG. Figure 5a for Figure 4 The charging circuit 100 is a schematic diagram showing temperature changes of the battery 60 during charging. Figure 5b for Figure 4 The charging circuit 100 is a schematic diagram showing current changes when the battery 60 is charging.

[0069] like Figure 4 As shown, the charging circuit 100 may include a rectifier circuit 201, a charge pump 202, and a Buck circuit 203. The rectifier circuit 201 is coupled to the charging coil 80 and can convert the AC current on the charging coil 80 into a DC current. The processor 10 can control the voltage and current output by the rectifier circuit 201, that is, the voltage and current on the charging coil 80, by controlling the duty cycle of the switching device within the rectifier circuit 201.

[0070] Buck circuit 203 can be coupled to rectifier circuit 201. Buck circuit 203 can be used to charge battery 60 based on the current output by rectifier circuit 201. For example, when charging circuit 100 is charging battery 60 in low-power mode, charging circuit 100 charges battery 60 at low power, and Buck circuit 203 provides constant voltage and current to battery 60.

[0071] The charge pump 202 can be coupled to the rectifier circuit 201 and further coupled to the battery 60. The charge pump 202 can control the charging or discharging of its internal capacitors via its internal switch array in a specific manner, thereby multiplying or reducing the input voltage by a specific factor (e.g., 1 / 2, 2, or 3). For example, when the charging circuit 100 is charging the battery 60 in high-power mode, the rectifier circuit 201 outputs a higher voltage and a lower current to the charge pump 202, and the charge pump 202 outputs a voltage that is a multiple of the voltage output by the rectifier circuit 201.

[0072] However, when the charging circuit 100 is charging the battery 60 in high-power mode, the higher voltage output by the rectifier circuit 201, i.e., the higher voltage across the charging coil 80, causes the wiring on the circuit board 70 to generate high eddy current losses due to coupling with the magnetic field of the charging coil 80, resulting in a rapid temperature rise at the circuit board 70. Furthermore, since the lower current output by the rectifier circuit 201, i.e., the lower current across the charging coil 80, results in lower coil losses in the charging coil 80, causing the temperature of the charging coil 80 to rise more slowly (relative to the temperature at the circuit board 70). Therefore, when the charging circuit 100 is charging the battery 60 in high-power mode, the temperature of the circuit board 70 rises faster than that of the charging coil 80. Consequently, when the temperature of the circuit board 70 reaches the stop-charging temperature, the temperature of the charging coil 80 may be significantly lower than the stop-charging temperature, causing the watch 1 to stop charging prematurely.

[0073] like Figure 5a As shown, when the charging circuit 100 charges the battery 60 in high power mode, the temperature of the circuit board 70 rises rapidly, so that the temperature of the circuit board 70 reaches the stop charging temperature T4 at time t1. Figure 5b As shown, when the watch 1 reaches the stop-charging temperature T4 at time t1, the charging circuit 100 stops charging the battery 60, and the current on the charging coil 80 is 0.

[0074] Exemplarily, the value of the stop-charging temperature T4 can be 35°C, 38°C, 39°C, 42°C, etc. It should be noted that the above examples are only for better explanation of the value of the stop-charging temperature T4, and should not be regarded as a limitation on the value of the stop-charging temperature T4. Those skilled in the art can set it according to their needs.

[0075] Figure 6 This is a schematic diagram of a charging circuit 100 provided in another embodiment of the present application. Figure 7 for Figure 6 A process diagram of the charging circuit 100 is shown.

[0076] like Figure 6 As shown, the charging circuit 100 includes a rectifier unit 101 and a transformer unit 102. The rectifier unit 101 can be coupled to the charging coil 80. The rectifier unit 101 can convert the AC voltage on the charging coil 80 into a DC voltage. In addition, the rectifier unit 101 can also be coupled to the processor 10, so that the processor 10 can adjust the voltage and current on the charging coil 80 through the rectifier unit 101.

[0077] In some examples, the rectifying unit 101 may include a full-bridge rectifying circuit.

[0078] The voltage transformation unit 102 can be coupled to the rectifier unit 101, and the voltage transformation unit 102 can also be coupled to the battery 60. The voltage transformation unit 102 can charge the battery 60 based on the current provided by the rectifier unit 101. In addition, the voltage transformation unit 102 can also be coupled to the processor 10, so that the processor 10 can adjust the voltage and current output to the battery 60 through the voltage transformation unit 102. When the voltage and current on the charging coil 80 change, the voltage transformation unit 102 can maintain a constant voltage and current output to the battery 60.

[0079] In some examples, the voltage transformation unit 102 may include at least one of a buck DC-DC converter, a boost DC-DC converter, and a buck-boost DC-DC converter.

[0080] like Figure 7 As shown, when charging circuit 100 charges battery 60, processor 10 first obtains charging information of battery 60, including the charge level, charging power, charging voltage, and charging current. Processor 10 then adjusts the output voltage and output current of rectifier unit 101, thereby adjusting the output power of rectifier unit 101, as well as the output voltage and output current of transformer unit 102, thereby adjusting the output power of transformer unit 102, based on the charging information. Simultaneously, processor 10 senses the temperature of circuit board 70 and charging coil 80 via temperature sensors.

[0081] When the processor 10 senses that the temperature at the circuit board 70 is greater than the temperature at the charging coil 80, the processor 10 reduces the voltage on the charging coil 80 by controlling the duty cycle of the switching device inside the rectifier unit 101, so that the coupling effect between the charging coil 80 and the wiring on the circuit board 70 is reduced, thereby reducing eddy current loss, and further reducing the rate of increase of the temperature at the circuit board 70, so that the temperature at the circuit board 70 is close to the temperature at the charging coil 80, extending the time for the temperature at the circuit board 70 to reach the stop charging temperature T4, and preventing the watch 1 from stopping charging too early.

[0082] When the processor 10 senses through the temperature sensor that the temperature at the circuit board 70 is lower than the temperature at the charging coil 80, the processor 10 increases the voltage on the charging coil 80 by controlling the duty cycle of the switching device inside the rectifier unit 101, so that the rate of increase of the temperature at the circuit board 70 is reduced, thereby making the temperature at the circuit board 70 close to the temperature at the charging coil 80, thereby preventing the watch 1 from stopping charging too early.

[0083] Figure 8 A flowchart of a wireless charging control method provided in one embodiment of the present application.

[0084] like Figure 8 As shown, the wireless charging control method provided in the embodiment of the present application is applied to Figure 6 The charging circuit 100 shown may include the following steps:

[0085] S101 : Obtain a temperature difference between the temperature of the circuit board 70 and the temperature of the charging coil 80 .

[0086] The processor 10 can sense the temperature of the circuit board 70 using the first temperature sensor NTC1 and the temperature of the charging coil 80 using the second temperature sensor NTC2. After obtaining the temperatures of the circuit board 70 and the charging coil 80, the processor 10 can subtract the temperature of the charging coil 80 from the temperature of the circuit board 70 to obtain the temperature difference between the two temperatures.

[0087] S102: When the difference indicates that the temperature at the circuit board 70 is greater than the temperature at the charging coil 80, reduce the voltage on the charging coil 80. Alternatively, when the difference indicates that the temperature at the circuit board 70 is less than the temperature at the charging coil 80, increase the voltage on the charging coil 80.

[0088] When the difference indicates that the temperature at the circuit board 70 is greater than the temperature at the charging coil 80, the processor 10 reduces the voltage on the charging coil 80, so that the coupling effect between the charging coil 80 and the wiring on the circuit board 70 is reduced, thereby reducing eddy current loss, and further reducing the rate of increase of the temperature at the circuit board 70, so that the temperature at the circuit board 70 is close to the temperature at the charging coil 80, extending the time for the temperature at the circuit board 70 to reach the stop charging temperature T4, and preventing the watch 1 from stopping charging too early.

[0089] When the difference indicates that the temperature at the circuit board 70 is lower than the temperature at the charging coil 80, the processor 10 increases the voltage on the charging coil 80, thereby increasing the coupling between the charging coil 80 and the wiring on the circuit board 70, thereby increasing the eddy current loss, and further increasing the rate of increase of the temperature at the circuit board 70, so that the temperature at the circuit board 70 is close to the temperature at the charging coil 80, thereby preventing the watch 1 from stopping charging too early.

[0090] In the above embodiment, the processor 10 adjusts the voltage on the charging coil 80 whenever the temperature sensor detects that the temperature at the circuit board 70 differs from the temperature at the charging coil 80. However, this results in the processor 10 adjusting the voltage on the charging coil 80 for the vast majority of the charging process. This frequent adjustment of the voltage on the charging coil by the processor 10 undoubtedly increases power consumption and may increase charging instability. Therefore, it is necessary to limit the operation of the processor 10 in adjusting the voltage on the charging coil 80.

[0091] In other embodiments, because the temperatures of the circuit board 70 and the charging coil 80 are both relatively low at the beginning of charging, and are significantly lower than the stop-charging temperature T4, even if there is a difference between the temperatures of the circuit board 70 and the charging coil 80, these temperatures will not cause the watch 1 to stop charging. Therefore, when the temperatures of the circuit board 70 and the charging coil 80 are relatively low, the processor 10 may not adjust the voltage on the charging coil 80. Therefore, to prevent the processor 10 from adjusting the voltage on the charging coil 80 too frequently, the temperatures of the circuit board 70 and the charging coil 80 may be limited.

[0092] In some examples, when the temperature at circuit board 70 and the temperature at charging coil 80 are both greater than a first temperature threshold, and when the difference indicates that the temperature at circuit board 70 is greater than the temperature at charging coil 80 , the voltage on charging coil 80 is reduced.

[0093] In some examples, when the temperature at circuit board 70 and the temperature at charging coil 80 are both greater than a first temperature threshold, and when the difference indicates that the temperature at circuit board 70 is less than the temperature at charging coil 80 , the voltage on charging coil 80 is increased.

[0094] In this way, when the temperature at the circuit board 70 and the temperature at the charging coil 80 are lower than the first temperature threshold, even if there is a difference between the temperature at the circuit board 70 and the temperature at the charging coil 80, the processor 10 does not adjust the voltage on the charging coil 80, thereby avoiding the processor 10 adjusting the voltage on the charging coil 80 too frequently, resulting in increased power consumption of the processor 10, and the frequent adjustment of the voltage on the charging coil 80 may increase the instability of the charging process.

[0095] Exemplarily, the value of the first temperature threshold can be 20°C, 30°C, 32°C, etc. It should be noted that the above examples are only for better explanation of the value of the first temperature threshold and should not be regarded as a limitation on the value of the first temperature threshold. The value of the first temperature threshold can be set by technical personnel in this field according to needs.

[0096] However, when both the temperature of the circuit board 70 and the temperature of the charging coil 80 are greater than the first temperature threshold, the processor 10 still needs to frequently adjust the voltage of the charging coil 80 when there is a temperature difference between the circuit board 70 and the charging coil 80. To further reduce the power consumption of the processor 10 and ensure stability during the charging process, the processor 10 can be limited to adjusting the voltage of the charging coil 80 only when the temperature difference between the circuit board 70 and the charging coil 80 is significant.

[0097] In other embodiments, the processor 10 is limited to adjusting the voltage on the charging coil 80 when the absolute value of the difference between the temperature at the circuit board 70 and the temperature at the charging coil 80 is greater than a difference threshold. In this case, S102 may include:

[0098] When the temperature of circuit board 70 and the temperature of charging coil 80 are both greater than a first temperature threshold, the absolute value of the difference between the temperatures of circuit board 70 and charging coil 80 is greater than the difference threshold, and the difference indicates that the temperature of circuit board 70 is greater than the temperature of charging coil 80, the voltage of charging coil 80 is reduced. Alternatively, when the temperature of circuit board 70 and the temperature of charging coil 80 are both greater than a first temperature threshold, the absolute value of the difference between the temperatures of circuit board 70 and charging coil 80 is greater than the difference threshold, and the difference indicates that the temperature of circuit board 70 is less than the temperature of charging coil 80, the voltage of charging coil 80 is increased.

[0099] In this way, even if the temperature at the circuit board 70 and the temperature at the charging coil 80 are both greater than the first temperature threshold, but the temperature difference between the two is less than the difference threshold, the processor 10 will not adjust the voltage on the charging coil 80, thereby further avoiding the processor 10 from frequently adjusting the voltage on the charging coil 80, reducing the power consumption of the processor 10, and ensuring stability during the charging process.

[0100] For example, the difference threshold may be less than the charging stop temperature T4. The difference threshold value can be set by those skilled in the art as needed. For example, the difference threshold value may include 0°C, 0.2°C, 1°C, 2°C, 3°C, 10°C, etc. It should be noted that the above examples are only intended to better illustrate the difference threshold value and should not be considered as limiting the difference threshold value.

[0101] It should be noted that, in some embodiments, only the difference threshold may be selected as the limit for the processor 10 to adjust the voltage of the charging coil 80. For example, S102 may include:

[0102] When the absolute value of the difference between the temperature at circuit board 70 and the temperature at charging coil 80 is greater than a difference threshold, and when the difference indicates that the temperature at circuit board 70 is greater than the temperature at charging coil 80, the voltage at charging coil 80 is reduced. Alternatively, when the absolute value of the difference between the temperature at circuit board 70 and the temperature at charging coil 80 is greater than a difference threshold, and when the difference indicates that the temperature at circuit board 70 is less than the temperature at charging coil 80, the voltage at charging coil 80 is increased.

[0103] In this way, even when the temperature at the circuit board 70 and the temperature at the charging coil 80 are relatively low, such as less than the first temperature threshold, as long as the absolute value of the difference between the temperature at the circuit board 70 and the temperature at the charging coil 80 is greater than the difference threshold, the processor 10 will adjust the voltage on the charging coil 80, thereby reducing the difference in the rising rate of the temperature at the circuit board 70 and the temperature at the charging coil 80 during the entire charging process.

[0104] In the above embodiments, some examples are described in which the processor 10 adjusts the voltage of the charging coil 80 when there is a temperature difference between the circuit board 70 and the charging coil 80. In the following embodiments, some examples are provided in which the processor 10 adjusts the current of the charging coil 80. It should be noted that the above embodiments describe when the processor 10 adjusts the voltage of the charging coil 80 and also apply to the following embodiments.

[0105] In some embodiments, S102 may include:

[0106] When the difference indicates that the temperature at circuit board 70 is greater than the temperature at charging coil 80, the voltage across charging coil 80 is reduced and the current across charging coil 80 is increased. Alternatively, when the difference indicates that the temperature at circuit board 70 is less than the temperature at charging coil 80, the voltage across charging coil 80 is increased and the current across charging coil 80 is reduced.

[0107] When the temperature at the circuit board 70 is higher than the temperature at the charging coil 80, the processor 10 reduces the voltage applied to the charging coil 80, weakening the coupling between the charging coil 80 and the wiring on the circuit board 70. This reduces eddy current losses on the circuit board 70, slowing the rate of temperature rise at the circuit board 70 and thereby reducing the difference between the rates of temperature rise at the circuit board 70 and the charging coil 80. However, to further reduce the difference in the rates of temperature rise between the two, the current applied to the charging coil 80 may be increased while the voltage applied to the charging coil 80 is reduced, thereby increasing the rate of temperature rise at the charging coil 80 and reducing the difference in the rates of temperature rise at the circuit board 70 and the charging coil 80.

[0108] When the temperature at circuit board 70 is lower than the temperature at charging coil 80, processor 10 increases the voltage applied to charging coil 80, strengthening the coupling between charging coil 80 and the traces on circuit board 70. This increases the rate of temperature rise at circuit board 70, thereby reducing the difference between the rates of temperature rise at circuit board 70 and charging coil 80. However, to further reduce the difference in the rates of temperature rise between the two, the current applied to charging coil 80 can be reduced while increasing the voltage applied to charging coil 80, thereby reducing the rate of temperature rise at charging coil 80 and thereby reducing the difference in the rates of temperature rise at circuit board 70 and charging coil 80.

[0109] For example, in order to ensure that the charging power provided by the charging circuit 100 to the battery 60 remains unchanged, the processor 10 may keep the overall output power of the charging circuit 100 unchanged when adjusting the voltage on the charging coil 80. Therefore, S102 may further include:

[0110] Obtaining the charging power provided by the charging circuit 100 to the battery 60;

[0111] When the difference indicates that the temperature at circuit board 70 is greater than the temperature at charging coil 80, the voltage at charging coil 80 is reduced while the charging power provided by charging circuit 100 to battery 60 remains unchanged. Alternatively, when the difference indicates that the temperature at circuit board 70 is less than the temperature at charging coil 80, the voltage at charging coil 80 is increased and the current at charging coil 80 is reduced while the charging power provided by charging circuit 100 to battery 60 remains unchanged.

[0112] After the processor 10 obtains the charging power of the battery 60, in order to keep the charging power of the charging circuit 100 to the battery 60 unchanged, the processor 10 can adjust the current on the charging coil 80 through the rectifier unit 101 when adjusting the voltage on the coil through the rectifier unit 101, so that the overall output power of the rectifier unit 101 remains unchanged.

[0113] In this way, the temperature at the circuit board 70 can be made close to the temperature at the charging coil 80, extending the time for the temperatures at the circuit board 70 and the charging coil 80 to reach the stop charging temperature T4, avoiding the watch 1 stopping charging too early, while keeping the charging power of the charging circuit 100 to the battery 60 unchanged.

[0114] Figure 9 A flowchart of a wireless charging control method provided in another embodiment of the present application is shown.

[0115] like Figure 9 As shown, the wireless charging control method provided in the embodiment of the present application is applied to Figure 6 The charging circuit 100 shown may include the following steps:

[0116] S201: Start charging. The processing circuit obtains charging information of the battery 60, such as power level, charging power, charging voltage, and charging current.

[0117] S202: Determine whether the current charging mode of the battery 60 is the first charging mode.

[0118] The charging circuit 100 controls the voltage, current, and power output by the rectifier unit 101 and the transformer unit 102 based on the charging information to charge the battery 60. The charging circuit 100 can provide multiple charging modes for the battery 60 and provide different charging powers to the battery 60 according to different charging modes. For example, the charging modes may include a first charging mode and a second charging mode. When the charging mode provided by the charging circuit 100 to the battery 60 is the first charging mode, the charging circuit 100 provides first charging parameters to the battery 60. The first charging parameters may include a first charging voltage Vout1, a first charging current I1, and a corresponding first charging power P1. When the charging mode provided to the battery 60 is the second charging mode, the charging circuit 100 provides second charging parameters to the battery 60. The second charging parameters may include a second charging voltage Vout2, a second charging current I2, and a corresponding second charging power P2. The first charging power P1 may be greater than the second charging power P2, the first charging voltage Vout1 may be greater than the second charging voltage Vout2, and the first charging current I1 may be greater than the second charging current I2.

[0119] The processor 10 may select a corresponding charging voltage, charging current, and corresponding charging power according to the charging mode provided for the battery 60. When the charging mode of the battery 60 is the first charging mode, the processor 10 executes S203. When the charging mode of the battery 60 is the second charging mode, the processor 10 executes S211 and provides the second charging parameter to the battery 60.

[0120] S203 : Provide a first charging parameter for the battery 60 .

[0121] S204 , reading the temperature T1 of the circuit board 70 and the temperature T2 of the charging coil 80 .

[0122] S205 , obtaining the temperature T3 of the case 30 of the watch 1 according to the temperature T1 of the circuit board 70 and the temperature T2 of the charging coil 80 .

[0123] When the processor 10 reads the temperature T1 of the circuit board 70 and the temperature T2 of the charging coil 80, the temperature T3 of the watch case 30 can be derived from these two temperatures. For example, the temperature T1 of the circuit board 70 and the temperature T2 of the charging coil 80 can be used as two variables to construct a function related to the temperature T3 of the watch case 30. Those skilled in the art can calculate the overall device temperature based on the temperature of two local locations on the device, which will not be discussed in detail here.

[0124] S206 , determining whether the temperature T3 of the case 30 of the watch 1 is greater than the charging stop temperature T4 .

[0125] When the temperature T3 of the watch case 30 is greater than the stop charging temperature T4, it is necessary to stop charging the battery 60. Therefore, S212 is executed to stop charging. When the temperature T3 of the watch case 30 is less than the stop charging temperature T4, S207 is executed.

[0126] S207 , determining whether the temperature T1 at the circuit board 70 and the temperature T2 at the charging coil 80 are both greater than a first temperature threshold T5 , and whether the absolute value of the difference between the temperature T1 at the circuit board 70 and the temperature T2 at the charging coil 80 is greater than a difference threshold T6 .

[0127] When the temperature T1 at the circuit board 70 and the temperature T2 at the charging coil 80 are both greater than the first temperature threshold T5, and the absolute value of the difference between the temperature T1 at the circuit board 70 and the temperature T2 at the charging coil 80 is greater than the difference threshold T6, execute S208.

[0128] When the temperature T1 at the circuit board 70 and the temperature T2 at the charging coil 80 are less than the first temperature threshold T5, and / or the absolute value of the difference between the temperature T1 at the circuit board 70 and the temperature T2 at the charging coil 80 is less than the difference threshold T6, execute S204.

[0129] S208 , determining whether the temperature T1 at the circuit board 70 is greater than the temperature T2 at the charging coil 80 .

[0130] When the temperature T1 of the difference indication circuit board 70 is greater than the temperature T2 of the charging coil 80 , the first charging voltage Vout1 on the charging coil 80 needs to be reduced. In this case, S209 is executed to reduce the first charging voltage Vout1 on the charging coil 80 .

[0131] When the temperature T1 of the difference indication circuit board 70 is lower than the temperature T2 of the charging coil 80 , the first charging voltage Vout1 on the charging coil 80 needs to be increased. In this case, S210 is executed to increase the first charging voltage Vout1 on the charging coil 80 .

[0132] In some embodiments, when adjusting the voltage on the charging coil 80 in S209 and S210, the corresponding current may also be adjusted based on the current charging power of the battery 60. For example, the voltage and current on the charging coil 80 may be adjusted simultaneously to maintain the charging power provided by the charging circuit 100 to the battery 60. Therefore, S209 and S210 may also include the steps of obtaining the charging power of the battery 60 and adjusting the current on the charging coil 80 to maintain the charging power provided by the charging circuit 100 to the battery 60. For details, please refer to the above embodiment regarding how, in order to ensure that the charging power provided to the battery 60 remains unchanged, the processor 10 maintains the overall output power of the charging circuit 100 while adjusting the voltage on the charging coil 80.

[0133] In some embodiments, after reading the temperature at the circuit board 70 and the temperature at the charging coil 80 in S204, the wireless charging control method may further include: when at least one of the temperature at the circuit board 70 and the temperature at the charging coil 80 is greater than a second temperature threshold, the charging circuit 100 stops charging the battery 60.

[0134] Exemplarily, the second temperature threshold may be greater than the first temperature threshold T5, and the second temperature threshold may be equal to the charging stop temperature T4.

[0135] Exemplarily, the value of the second temperature threshold can be 35°C, 38°C, 39°C, 42°C, etc. It should be noted that the above examples are only for better explanation of the value of the second temperature threshold and should not be regarded as a limitation on the value of the second temperature threshold. The value of the second temperature threshold can be set by technical personnel in this field according to needs.

[0136] In this way, the user can be protected from being affected by the local temperature of the watch 1 being too high when using the watch 1.

[0137] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0138] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only 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 device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0139] Units described as separate components may or may not be physically separate, and components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0140] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware.

[0141] The above content is only a specific embodiment of this application, but the scope of protection of this application is not limited to this. Any changes or replacements 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 wireless charging control method, applied to an electronic device; the electronic device comprises a circuit board, a charging coil, and a battery; the circuit board is provided with a plurality of electronic components; the charging coil and the plurality of electronic components are connected to form a charging circuit, and the charging circuit is used to charge the battery; characterized in that: The method comprises: Obtaining a temperature difference between the circuit board and the charging coil; When the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, reducing the voltage on the charging coil; or, When the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage across the charging coil is increased.

2. The wireless charging control method according to claim 1, wherein: When the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, reducing the voltage on the charging coil comprises: When the temperature at the circuit board and the temperature at the charging coil are both greater than a first temperature threshold, and when the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, reducing the voltage on the charging coil; When the difference indicates that the temperature at the circuit board is lower than the temperature at the charging coil, increasing the voltage on the charging coil comprises: When the temperature at the circuit board and the temperature at the charging coil are both greater than a first temperature threshold, and when the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage on the charging coil is increased.

3. The wireless charging control method according to claim 1 or 2, wherein: When the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, reducing the voltage on the charging coil comprises: When the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, reducing the voltage on the charging coil and increasing the current on the charging coil; When the difference indicates that the temperature at the circuit board is lower than the temperature at the charging coil, increasing the voltage on the charging coil comprises: When the difference indicates that the temperature at the circuit board is less than the temperature at the charging coil, the voltage across the charging coil is increased and the current across the charging coil is decreased.

4. The wireless charging control method according to any one of claims 1 to 3, wherein: When the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, reducing the voltage on the charging coil comprises: When an absolute value of a difference between a temperature at the circuit board and a temperature at the charging coil is greater than a difference threshold, and when the difference indicates that the temperature at the circuit board is greater than the temperature at the charging coil, reducing a voltage on the charging coil; When the difference indicates that the temperature at the circuit board is lower than the temperature at the charging coil, increasing the voltage on the charging coil comprises: When an absolute value of a difference between the temperature at the circuit board and the temperature at the charging coil is greater than a difference threshold, and when the difference indicates that the temperature at the circuit board is lower than the temperature at the charging coil, the voltage on the charging coil is increased.

5. The wireless charging control method according to any one of claims 1 to 4, characterized in that: The method further comprises: The charging circuit stops charging the battery when at least one of the temperature at the circuit board and the temperature at the charging coil is greater than a second temperature threshold; the second temperature threshold is greater than the first temperature threshold.

6. The wireless charging control method according to claim 5, wherein: The electronic device further includes a housing having a receiving cavity; the circuit board, the charging coil, and the battery are located in the receiving cavity; and the method further includes: obtaining a temperature on the housing according to a temperature on the circuit board and a temperature on the charging coil; When the temperature of the housing is greater than the second temperature threshold, the charging circuit stops charging the battery.

7. An electronic device, characterized in that: The system comprises a processor, a circuit board, a charging coil, and a battery; the circuit board is provided with a plurality of electronic components, the charging coil and the plurality of electronic components form a charging circuit; the charging circuit is used to charge the battery; Wherein, when the temperature at the circuit board is greater than the temperature at the charging coil, the processor reduces the voltage on the charging coil; or, The processor increases the voltage across the charging coil when the temperature at the circuit board is less than the temperature at the charging coil.

8. The electronic device according to claim 7, wherein: The charging circuit comprises: a rectifier unit, the rectifier unit being coupled to the charging coil and further coupled to the battery, the rectifier unit being configured to provide current to the battery, and the processor regulating the voltage on the charging coil through the rectifier unit; a voltage transformation unit, the voltage transformation unit being coupled to the rectifier unit and further coupled to the battery, and the voltage transformation unit charging the battery according to the current provided by the rectifier unit; When the processor adjusts the voltage on the charging coil according to the temperature of the circuit board and the temperature of the charging coil, the current output by the voltage transformation unit to the battery remains constant.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory, characterized in that: The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

11. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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