Wireless charging method and wireless charging device

Abstract

Disclosed in the embodiments of the present application are a wireless charging method and a wireless charging device. In the wireless charging method, a power supply switch (106) and a sampling module (107) are newly added to a wireless charging device (i.e., an RX device). The RX device can measure the magnitude of voltage Vrect by means of the sampling module (107). When the detected voltage Vrect is greater than a first threshold and is less than a hardware operating voltage threshold, the RX device can switch on the power supply switch to allow a battery (104) to supply power to an RX IC (102), so as to initiate wireless charging. By means of the method, a wireless charging function is realized when the degree of coupling between devices is relatively low, thereby improving the degree of freedom and experience of a user when using wireless charging. In some embodiments, by means of the method, the coupling strength between the devices can also be displayed on the RX device, thereby prompting the user to adjust the positions of the devices so as to improve the wireless charging efficiency and enhance the user experience.

Description

A wireless charging method and a wireless charging device

[0001] This application claims priority to Chinese Patent Application No. 202510127820.5, filed on January 27, 2025, with the State Intellectual Property Office of China, entitled "A Wireless Charging Method and Wireless Charging Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of terminal technology, and in particular to a wireless charging method and a wireless charging device. Background Technology

[0003] Wireless charging systems eliminate the constraints of traditional charging cables, improving the convenience of charging devices.

[0004] However, in practical applications of non-magnetic wireless charging, placing the RX device on the TX device does not guarantee that the RX device will enter the wireless charging process. Low coupling between the devices may cause the Vrect voltage in the RX IC to fall below the hardware operating voltage threshold, thus preventing the RX IC from activating and the RX device from entering the subsequent wireless charging process.

[0005] Since the lower limit of the aforementioned hardware operating voltage threshold depends on the chip hardware process of the RX IC and cannot be modified at present, users must correctly place the RX device within the charging area of ​​the TX device to receive sufficient energy in order to ensure successful wireless charging. This strict requirement for placement not only increases the complexity of user operation but also reduces the convenience and user experience of wireless charging to some extent. Summary of the Invention

[0006] This application provides a wireless charging method and a wireless charging device, which is used to power the RX IC with a battery to start the RX IC chip when the Vrect voltage in the RX IC is less than the hardware operating voltage threshold and greater than a first threshold, thereby enabling the wireless charging device (i.e., the RX device) to enter the charging process, so as to solve the problem that the RX device cannot enter the charging process due to improper placement of the RX device by the user.

[0007] In a first aspect, this application provides a wireless charging device, characterized in that it includes a receiving coil 101, a receiving integrated circuit (RX IC) 102, a DC-DC converter 103, a battery 104, a processor 105, a power switch 106, and a sampling module 107; wherein, the input terminal of the DC-DC converter 103 is connected to the receiving coil 101 via the RX IC 102, and the output terminal of the DC-DC converter 103 is connected to the input terminal of the battery 104; one end of the power switch 106 is connected to the output terminal of the battery 104, and the other end of the power switch 106 is connected to the RX IC 102; the processor 105 is connected to the RX IC 102 via the sampling module 107, the sampling module 107 is used to detect a first voltage of the RX IC 102, the first voltage being the DC voltage obtained after rectification of the AC power output from the receiving coil 101, and the first voltage is used to power the RX IC 102; the processor 105 is also connected to the control terminal of the power switch 106, used to detect the first voltage when it is less than the RX IC 102. When the startup voltage of 102 is greater than the first threshold, the power supply switch 106 controls the battery 104 to conduct to the RX IC 102, so as to supply power to the RX IC 102; the RX IC 102 is used to send a first command to the wireless power supply device, and the first command is used to start the charging process.

[0008] Using the wireless charging device provided in the first aspect, when the Vrect voltage in the RX IC 102 is less than the hardware operating voltage threshold but greater than a first threshold, the RX IC 102 chip can be powered by the battery 104 to start the RX IC 102 chip, thereby enabling the RX device to enter the charging process. Compared to existing RX devices, the RX device provided in the first aspect allows the RX device to enter the charging process at a point on the TX device where charging would not normally be initiated, thus significantly improving the user's freedom and experience when using wireless charging.

[0009] In conjunction with the first aspect, in some embodiments, the processor 105 is also configured to control the power supply switch 106 to disconnect the path between the battery 104 and the RX IC 102 when the first voltage is greater than or equal to the startup voltage of the RX IC 102.

[0010] By using the wireless charging device provided in the first aspect, the RX device can control the power switch 106 to turn off after the charging process is started, so that the battery 104 does not have to continuously supply power to the RX IC 102, reducing the power consumption of the battery 104 and avoiding the negative impact of over-discharge on the lifespan of the battery 104.

[0011] In conjunction with the first aspect, in some embodiments, the RX IC 102 is further configured to send a second instruction to the wireless power supply device after sending a first instruction to the wireless power supply device, the second instruction being configured to instruct the wireless power supply device to maintain a constant transmission power for a first duration; the processor 105 is configured to detect a first voltage after sending the second instruction to the wireless power supply device, and determine the degree of coupling between the wireless charging device and the wireless power supply device based on the magnitude of the first voltage.

[0012] Using the wireless charging device provided in the first aspect, the RX device can instruct the TX device (i.e., the aforementioned wireless power supply device) to maintain a constant transmission power after the charging process is initiated. When the transmission power of the TX device remains constant, it means that the energy transmitted by the TX device per unit time is constant. At this time, the magnitude of the Vrect voltage is positively correlated with the degree of coupling between the devices. The RX device can determine the degree of coupling between the devices based on the actual measured magnitude of the Vrect voltage, thereby enabling subsequent user interaction.

[0013] In conjunction with the first aspect, in some embodiments, the wireless charging device outputs a first prompt, which indicates the degree of coupling between the wireless charging device and the wireless power supply device.

[0014] Using the wireless charging device provided in the first aspect, the RX device can indicate the current coupling degree between the devices to the user in real time through a first prompt, so that the user can adjust the position of the RX device on the TX device based on the real-time feedback to improve charging efficiency.

[0015] In conjunction with the first aspect, in some embodiments, the first prompt includes text, an icon, audio, or a breathing light status.

[0016] In conjunction with the first aspect, in some embodiments, if the coupling strength is lower than the first strength, the processor 105 outputs a second prompt message, which is used to remind the user to move the wireless charging device.

[0017] Using the wireless charging device provided in the first aspect, the RX device can further prompt the user to move the RX device even when the coupling strength has not reached its strongest (i.e., below the first strength). The effect of outputting a second prompt is stronger than simply outputting the first prompt.

[0018] In conjunction with the first aspect, in some embodiments, after a first duration of sending the second instruction to the wireless power supply device, the wireless charging device enters a normal charging state.

[0019] Using the wireless charging device provided in the first aspect, the RX device can instruct the TX device to enter a normal charging state after instructing the TX device to maintain a constant transmission power for a first period of time. In this normal charging state, the TX device can continuously adjust its transmission power based on the RX device's instructions, thereby adapting to the RX device's load requirements and ensuring the safety of the RX device and the efficiency of wireless charging.

[0020] Secondly, this application provides a wireless charging method applied to a wireless charging device. The wireless charging device includes a receiving coil 101, a receiving integrated circuit RX IC 102, a DC-DC converter 103, a battery 104, a processor 105, a power switch 106, and a sampling module 107. The input terminal of the DC-DC converter 103 is connected to the receiving coil 101 via the RX IC 102, and the output terminal of the DC-DC converter 103 is connected to the input terminal of the battery 104. One end of the power switch 106 is connected to the output terminal of the battery 104, and the other end of the power switch 106 is connected to the RX IC 102. The processor 105 is connected to the RX IC 102 via the sampling module 107, and the processor 105 is also connected to the control terminal of the power switch 106. The method includes: detecting a first voltage of the RX IC 102, the first voltage being a DC voltage obtained by rectifying the AC power output from the receiving coil 101, the first voltage being used to power the RX IC 102; and detecting a voltage less than the RX IC 102. When the startup voltage of 102 is greater than the first threshold, the control power switch 106 turns on the battery 104 and RX IC 102 to supply power to RX IC 102; after RX IC 102 starts up, it sends a first command to the wireless power supply device to start the charging process.

[0021] Using the wireless charging device provided in the second aspect, when the Vrect voltage in the RX IC 102 is less than the hardware operating voltage threshold but greater than the first threshold, the RX IC 102 chip can be powered by the battery 104 to start the RX IC 102 chip, thereby enabling the RX device to enter the charging process. Compared to existing RX devices, the RX device provided in the first aspect allows the RX device to enter the charging process at a point on the TX device where charging would not normally be initiated, thus significantly improving the user's freedom and experience when using wireless charging.

[0022] In conjunction with the second aspect, in some embodiments, the method further includes: when the first voltage is greater than or equal to the startup voltage of RX IC 102, controlling the power supply switch 106 to disconnect the path between the battery 104 and RX IC 102.

[0023] By implementing the method provided in the above embodiments, the RX device can control the power supply switch 106 to turn off after the charging process is started, so that the battery 104 does not have to continuously supply power to the RX IC 102, reducing the power consumption of the battery 104 and avoiding the negative impact of over-discharge on the lifespan of the battery 104.

[0024] In conjunction with the second aspect, in some embodiments, after sending a first instruction to the wireless power supply device, the method further includes: sending a second instruction to the wireless power supply device, the second instruction being used to instruct the wireless power supply device to maintain a constant transmission power for a first duration; after sending the second instruction to the wireless power supply device, detecting a first voltage, and determining the degree of coupling between the wireless charging device and the wireless power supply device based on the magnitude of the first voltage.

[0025] By implementing the method provided in the above embodiments, the RX device can instruct the TX device (i.e., the aforementioned wireless power supply device) to maintain a constant transmission power after initiating the charging process. When the transmission power of the TX device remains constant, it means that the energy transmitted by the TX device per unit time is constant. At this time, the magnitude of the Vrect voltage is positively correlated with the degree of coupling between the devices. The RX device can determine the degree of coupling between the devices based on the actual measured magnitude of the Vrect voltage, thereby enabling subsequent user interaction.

[0026] In conjunction with the second aspect, in some embodiments, the method further includes: outputting a first prompt, the first prompt being used to indicate the degree of coupling between the wireless charging device and the wireless power supply device.

[0027] By implementing the method provided in the above embodiments, the RX device can indicate the current coupling degree between the devices to the user in real time through a first prompt, so that the user can adjust the position of the RX device on the TX device based on the real-time feedback to improve charging efficiency.

[0028] In conjunction with the second aspect, in some embodiments, the first prompt includes text, an icon, audio, or a breathing light status.

[0029] In conjunction with the second aspect, in some embodiments, the method further includes: if the coupling strength is lower than the first strength, the processor 105 outputs a second prompt message, the second prompt message being used to remind the user to move the wireless charging device.

[0030] By implementing the method provided in the above embodiments, the RX device can further prompt the user to move the RX device even when the coupling degree has not reached its strongest (i.e., below the first strength). The effect of outputting a second prompt message is stronger than simply outputting a first prompt.

[0031] In conjunction with the second aspect, in some embodiments, the method further includes: after a first duration of sending a second instruction to the wireless power supply device, the wireless charging device enters a normal charging state.

[0032] By implementing the method provided in the above embodiments, the RX device can instruct the TX device to enter a normal charging state after instructing the TX device to maintain a constant transmission power for a first period of time. In this normal charging state, the TX device can continuously adjust its transmission power based on the RX device's instructions, thereby adapting to the RX device's load requirements and ensuring the safety of the RX device and the efficiency of wireless charging.

[0033] Thirdly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor 105, implements the method described in the second aspect and any possible implementation thereof.

[0034] Fourthly, this application provides a computer program product, including a computer program that, when executed by a processor 105, implements the method described in the second aspect and any possible implementation thereof.

[0035] It is understood that the computer storage medium provided in the third aspect and the computer program product provided in the fourth aspect are both used to execute the method provided in this application. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here. Attached Figure Description

[0036] Figure 1 is a schematic diagram of a wireless charging system provided in an embodiment of this application;

[0037] Figure 2 is a schematic block diagram of a wireless charging-related structure in a receiving electronic device according to an embodiment of this application;

[0038] Figure 3 is a timing diagram of a wireless charging startup process for a receiving electronic device provided in an embodiment of this application;

[0039] Figure 4 is a graph showing the relationship between the Vrect voltage of the RX IC and the X-axis position when the RX device moves laterally on the TX device according to an embodiment of this application.

[0040] Figure 5 is a graph showing the relationship between the Vrect voltage of the RX IC and the Y-axis position when the RX device moves longitudinally on the TX device according to an embodiment of this application.

[0041] Figure 6 is a schematic diagram of a charging dock provided in an embodiment of this application;

[0042] Figure 7 is a schematic diagram of a mobile phone provided in an embodiment of this application;

[0043] Figure 8 is a schematic diagram of the coupling strength corresponding to different positional relationships between TX and RX provided in an embodiment of this application;

[0044] Figure 9 is a schematic diagram of a Bluetooth headset provided in an embodiment of this application;

[0045] Figure 10 is a schematic diagram showing the correspondence between the color of a breathing light and the coupling strength between devices according to an embodiment of this application;

[0046] Figure 11 is a schematic diagram showing the relationship between the brightness of a breathing light and the coupling strength between devices according to an embodiment of this application;

[0047] Figure 12 is a schematic diagram showing the relationship between the flashing frequency of a breathing light and the coupling strength between devices according to an embodiment of this application.

[0048] Figure 13 is a schematic diagram of a reverse charging scenario using the wireless charging method provided in this application, according to an embodiment of this application.

[0049] Figure 14 is a schematic diagram of the hardware structure of an RX device provided in an embodiment of this application. Detailed Implementation

[0050] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be a limitation of this application.

[0051] Figure 1 is a schematic diagram of a wireless charging system provided in an embodiment of this application.

[0052] As shown in Figure 1, the wireless charging system described above can consist of two parts: a transmitting electronic device (TX device) and a receiving electronic device (RX device). The transmitting electronic device includes wireless charging docks and other electronic devices with wireless transmission capabilities, while the receiving electronic device includes mobile phones, watches, headphones, tablets, and other electronic devices with wireless reception capabilities. However, this application does not limit the specific types of the transmitting and receiving electronic devices to the types listed above.

[0053] The working principle and process of the wireless charging system are illustrated in Figure 1. Specifically, the transmitting electronic device can pass alternating current (AC) through its coil, thereby generating a time-varying magnetic field around the coil. Subsequently, as shown in Figure 1, the coil in the receiving electronic device can sense this changing electromagnetic field, that is, the receiving coil can sense the electromagnetic signal emitted by the transmitting electronic device, thus generating AC in its coil. This AC is then converted into direct current (DC) by the integrated circuit (RX IC) in the receiving electronic device and ultimately stored in the battery, thereby achieving wireless charging of the receiving electronic device. The voltage of the DC converted by the RX IC is denoted as Vrect.

[0054] However, in practical applications of non-magnetic wireless charging, placing the RX device on the TX device does not guarantee that the RX device will initiate the charging process. For example, the aforementioned wireless charging system can use a wireless charging dock as the TX device and a mobile phone as the RX device. When the user places the phone on the edge of the charging dock, the low coupling caused by the misalignment between the phone and the dock results in the Vrect voltage in the RX IC not reaching the hardware operating voltage threshold of the RX IC. This causes the wireless charging communication module on the RX IC to malfunction, preventing the phone and the charging dock from establishing a communication connection for mutual recognition, thus preventing the phone from initiating the charging process. The degree of coupling between the devices reflects the efficiency of energy (i.e., electrical energy) transfer from the coil of the TX device to the coil of the RX device.

[0055] Understandably, in the aforementioned wireless charging system, the determination of whether the Vrect voltage in the RX IC reaches the hardware operating voltage threshold is automatic. When the Vrect voltage exceeds the hardware operating voltage threshold, all components in the RX IC (including the aforementioned wireless charging communication module) automatically start working, thereby automatically outputting a stable voltage for battery charging, without requiring additional voltage acquisition or judgment from the receiving electronic device. Conversely, when the Vrect voltage does not exceed the hardware operating voltage threshold, the RX IC will not conduct, and no additional control commands are needed to stop the RX IC from working.

[0056] Since the lower limit of the aforementioned hardware operating voltage threshold depends on the chip hardware process of the RX IC and cannot be modified at present, users must correctly place the RX device within the charging area of ​​the TX device to receive sufficient energy to ensure successful wireless charging. Improper placement, resulting in a significant positional deviation between the RX and TX devices (such as placing the phone on the edge of the charging dock), may lead to insufficient energy received by the RX device, preventing the RX IC from operating and thus hindering the wireless charging process, ultimately impacting the user's charging experience.

[0057] As discussed above, the current wireless charging methods place high demands on the placement of the RX device. This strict requirement not only increases the complexity of user operation but also reduces the convenience and user experience of wireless charging to some extent.

[0058] Therefore, this application provides a wireless charging method. In this wireless charging method, a power supply switch 106 and a sampling module 107 are added to the receiving electronic device. The receiving electronic device can detect the magnitude of the Vrect voltage through the sampling module 107. The Vrect voltage is also referred to as the first voltage. When the detected Vrect voltage is greater than the first threshold and less than the hardware operating voltage threshold, the receiving electronic device can obtain energy from the battery 104 through the power supply switch 106 to power the RX IC 102 to support its operation, thereby establishing a communication connection between the receiving electronic device and the transmitting electronic device, and thus initiating the wireless charging process. The receiving electronic device is also referred to as a wireless charging device, and the transmitting electronic device is also referred to as a wireless power supply device. The hardware operating voltage threshold is also referred to as the startup voltage of the RX IC 102.

[0059] The above-mentioned wireless charging method enables the RX device to achieve wireless charging function with a low degree of coupling with the TX device, thereby significantly improving the user's freedom and experience when using wireless charging.

[0060] Figure 2 is a schematic block diagram of a wireless charging-related structure in a receiving electronic device provided in an embodiment of this application.

[0061] As shown in Figure 2, the receiving electronic device may include a receiving coil 101, an RX IC 102, a DC-DC converter 103, a battery 104, a processor 105, a power switch 106, and a sampling module 107. It is understood that the receiving coil 101 specifically refers to the coil used to receive electromagnetic signals in the receiving electronic device during wireless charging, and not the coil used in other technologies on the receiving electronic device, such as near field communication (NFC) technology. The RX IC 102 is also referred to as a receiving integrated circuit. Similarly, the processor specifically refers to the processor related to wireless charging in the receiving electronic device. In Figure 2, the processor 105 may be an application processor (AP 105) 105.

[0062] The input terminal of the DC-DC converter 103 is connected to the receiving coil 101 via the RX IC 102, and the output terminal of the DC-DC converter 103 is connected to the input terminal of the battery 104. This allows the power received by the receiving coil 101 to be stored in the battery 104 after the RX IC 102 is activated. The RX IC 102 may include a low dropout regulator (LDO) 1021 and a rectifier bridge 1022. The input terminal of the rectifier bridge 1022 can be connected to the receiving coil 101 to receive the AC power generated by the receiving coil 101 and rectify it into DC power. The output terminal of the rectifier bridge 1022 is connected to the input terminal of the LDO 1021 to output the rectified DC power. The output terminal of the LDO 1021 is connected to the input terminal of the DC-DC converter 103 to output a stable voltage to the DC-DC converter 103 after the RX IC 102 is activated.

[0063] One end of the power switch 106 is connected to the output terminal of the battery 104, and the other end is connected to the RX IC 102. Specifically, the power switch 106 is connected to the power supply terminal of the RX IC 102, which refers to the input pin that provides the power required for the operation of the various devices in the RX IC 102. It is understood that, not limited to a switch form, the power switch 106 is a selective conduction circuit module. The power switch 106 is in the off state by default, meaning that there is no conduction between the battery 106 and the RX IC 102. This selective conduction means that the circuit is only in a conducting state when certain conditions are met; otherwise, the circuit is in an open-circuit state.

[0064] The AP 105 can be connected to the RX IC 102 via the sampling module 107. The sampling module 107 detects the Vrect voltage of the RX IC 102. This Vrect voltage is the DC voltage obtained after rectification of the AC power output from the receiving coil 101, and it is the power supply voltage of the RX IC 102. In other words, the Vrect voltage can provide the operating voltage for the various devices in the RX IC 102. Alternatively, the AP 105 can be directly connected to the RX IC 102. For example, the AP 105 can be connected to the RX IC 102 via an inter-integrated circuit (I2C). Understandably, when the RX IC 102 is not powered on, the AP 105 cannot directly obtain the Vrect voltage from the RX IC 102 via I2C. In this case, the AP 105 needs to use the sampling module 107 to obtain the Vrect voltage from the RX IC 102. The AP 105 is also connected to the control terminal of the power switch 106, used to control the power switch 106 to connect the battery 104 to the RX IC 102 and supply power to the RX IC 102 when the Vrect voltage is less than the hardware operating voltage threshold but greater than a first threshold. The RX IC 102 is used to send a first command to the wireless power supply device, which is used to initiate the charging process. Specifically, the first command can be used to instruct the TX device to increase its transmission power.

[0065] The receiving electronic device may include more modules related to wireless charging, not limited to the modules shown in Figure 2. This application does not impose any special limitations on this.

[0066] Based on the structure shown in Figure 2, the receiving electronic device can execute the wireless charging startup process shown in Figure 3. It can be understood that although each step in the wireless charging process shown in Figure 3 is executed by a module within the RX device, the RX device can also be considered the main body executing the following steps.

[0067] S101 and AP 105 detect the Vrect voltage of RX IC 102 through sampling module 107.

[0068] Understandably, the aforementioned TX device transmits packet internet groper (ping) signals at a certain frequency. These ping signals are used to detect whether the receiving electronic device is within the effective range of wireless charging, and to establish and maintain a communication connection with the RX device, thereby ensuring that the TX and RX devices can recognize each other and prepare for energy transfer in the subsequent wireless charging process. When the user places the aforementioned RX device on the aforementioned TX device, the ping signal transmitted by the TX device will be induced by the receiving coil 101 in the RX device to generate alternating current, which is then converted into direct current by the RX IC 102. At this time, the Vrect voltage of the RX IC 102 can be detected by the aforementioned sampling module 107 and transmitted to the AP 105.

[0069] For example, the sampling module 107 may include the following devices: a sampling resistor, an operational amplifier, a filter capacitor, and an analog-to-digital converter. The sampling resistor may be connected in series in the path of the Vrect voltage. The operational amplifier may be configured as a non-inverting amplifier, with its input connected to the sampling resistor and its output used to output the amplified voltage signal. The filter capacitor may be connected in parallel to the output of the operational amplifier for filtering. The analog-to-digital converter is connected to the output of the filter capacitor to convert the filtered analog voltage into a digital signal. Without being limited to the above components and circuit structures, this application embodiment does not impose special restrictions on the specific components and circuit structures used by the sampling module 107 to implement the function of acquiring the Vrect voltage from the RX IC 102 and transmitting it to the AP 105.

[0070] As can be understood, as shown in Figure 1, the RX IC 102 provides a Vrect pin, and the sampling module 107 can obtain the Vrect voltage from the Vrect pin. This embodiment does not specifically limit the location within the RX IC 102 where the Vrect pin is connected to obtain the Vrect voltage. Optionally, as shown in Figure 2, the Vrect pin can be connected between the rectifier bridge 1022 and the LDO 1021.

[0071] S102. AP determines whether the Vrect voltage is greater than or equal to the hardware operating voltage threshold. If the Vrect voltage is greater than or equal to the hardware operating voltage threshold, it jumps to S106; otherwise, it executes step S103.

[0072] Understandably, if the AP determines that the Vrect voltage is greater than or equal to the hardware operating voltage threshold, it indicates that the coupling between the RX and TX devices is relatively high, and the wireless charging process can be initiated directly according to existing technology. In this case, the AP will not perform any additional operations.

[0073] S103. AP determines whether the Vrect voltage is greater than the first threshold. If the Vrect voltage is greater than the first threshold, proceed to step S104; otherwise, proceed to step S108.

[0074] The first threshold mentioned above can be predetermined by the R&D personnel and stored in the RX device. Understandably, when the Vrect voltage is greater than the first threshold but lower than the hardware operating voltage threshold of the RX IC 102, the RX device can use the electrical energy in the battery 104 to start the RX IC 102. In other words, the lower the first threshold, the more off-center the RX device can be placed on the TX device. This is because the more off-center the RX device is placed on the TX device, the lower the coupling between the RX and TX devices. Therefore, for a given amount of energy emitted by the TX device, the RX device receives less electrical energy, and the remaining energy is dissipated as heat, leading to higher device heating and a greater negative impact on user experience. Therefore, the first threshold is specifically determined by the R&D personnel based on different RX devices.

[0075] Understandably, if the AP determines that the Vrect voltage is less than or equal to the first threshold mentioned above, it means that the coupling between the RX device and the TX device is very low. The above situation can be regarded as a scenario where wireless charging is not performed. For example, if the user simply places the RX device and the TX device side by side, there may also be a Vrect voltage in the RX IC 102 that is less than the first threshold.

[0076] S104 and AP 105 control the power supply switch 106 to connect the battery 104 to the RX IC 102.

[0077] Specifically, after AP 105 determines that the aforementioned Vrect voltage is greater than the aforementioned first threshold and less than the hardware operating voltage threshold, AP 105 can send an enable signal to the aforementioned power supply switch 106. Upon receiving the aforementioned enable signal, the aforementioned power supply switch 106 is turned on. This application embodiment does not specifically limit the specific form of the aforementioned enable signal.

[0078] S105 and battery 104 power RX IC 102.

[0079] The power supply terminals of the aforementioned RX IC 102 may include independent power supply pins and a Vrect power supply interface. The independent power supply pins are power supply pins that can directly supply power to the various devices in the RX IC 102, while the Vrect power supply interface is a pin that supplies power to the various devices in the RX IC 102 by increasing the Vrect voltage. Optionally, the power supply switch 106 may be connected to the independent power supply pins on the RX IC 102. Optionally, the power supply switch 106 may be connected to the Vrect power supply interface on the RX IC 102.

[0080] S106. If the Vrect voltage is greater than or equal to the hardware operating voltage threshold, the RX IC 102 is started. After the RX IC 102 is started, the RX IC 102 sends the first instruction to the TX device to start the charging process.

[0081] It is understandable that there are two situations in which the Vrect voltage is greater than or equal to the above-mentioned hardware operating voltage threshold in step S106. One is that the AP 105 detects that the Vrect voltage itself is greater than the above-mentioned hardware operating voltage threshold in step S101; the other is that after the battery 104 supplies power to the RX IC 102, the Vrect voltage is greater than the above-mentioned hardware operating voltage threshold.

[0082] When the Vrect voltage is greater than or equal to the aforementioned hardware operating voltage threshold, the RX IC102 is activated. This means that its wireless charging communication module is also activated. Subsequently, the RX device can send a first command to the TX device through the wireless charging communication module to initiate the charging process. The first command includes a response signal. For example, the response signal may include the device information and configuration package of the RX device to inform the TX device of the RX device's identity and communication capabilities. Specifically, the device information may include the device model, supported charging power range, and other relevant parameters to help the TX device understand the charging needs of the RX device. The configuration package is used to negotiate communication parameters with the TX device, such as modulation method and data transmission rate, to ensure efficient and stable communication between the devices. Based on the negotiation results, the RX device can also send a power control package to inform the device of the required charging power, and the TX device can dynamically adjust the output power according to the information in the power control package. It can be understood that after the RX device sends the power control package to the TX device, it means that the communication link and parameter configuration between the devices have been completed, and the wireless charging process has officially begun.

[0083] Optionally, the aforementioned RX and TX devices can establish and configure the communication link based on the Qi wireless charging standard introduced by the Wireless Power Consortium (WPC). It is understood that the process of the RX device sending data (such as the aforementioned power control packet, device information, and configuration packet) to the TX device is achieved through electromagnetic coupling between the coils. Specifically, the RX device can change the coil impedance through load modulation, causing a change in magnetic flux. The TX device detects these changes to receive data, thereby achieving the aforementioned data transmission.

[0084] Understandably, after the RX device starts charging, it instructs the TX device to increase its transmission power accordingly, ensuring that the Vrect voltage in the RX device is greater than or equal to the aforementioned hardware operating voltage threshold. This maintains the operational status of all components in the RX IC 102, allowing the RX IC 102 to output a stable voltage, which is then stored in the battery 104, thus achieving wireless charging. Specifically, before the RX IC 102 is activated, the power supply path between the receiving coil 101 and the DC-DC converter 103 is not connected; after the RX IC 102 is activated, the power supply path between the receiving coil 101 and the DC-DC converter 103 is connected. The instruction to instruct the TX device to increase its transmission power also falls under the category of the first instruction mentioned above.

[0085] Understandably, after the RX IC 102 is activated, the RX device can control the TX device to increase its transmission power, and the Vrect voltage will also increase accordingly. Therefore, the RX IC 102 no longer needs to rely on the power supply of the battery 104. Thus, in step S105, the RX device uses the battery 104 to power the RX IC 102 only for a short period of time, not continuously.

[0086] Therefore, optionally, steps S107-S108 can follow step S106.

[0087] S107 and AP 105 detect the Vrect voltage of RX IC 102.

[0088] Optionally, after RX IC 102 is powered on, AP 105 can obtain the Vrect voltage of RX IC 102 via I2C. Optionally, AP 105 can still detect the Vrect voltage of RX IC 102 through the sampling module described above. This application embodiment does not impose any special limitations on this.

[0089] S108, AP determines that Vrect voltage is greater than or equal to the hardware operating voltage threshold, AP 105 controls power switch 106 to disconnect the path between battery 104 and RX IC 102.

[0090] Specifically, when AP 105 determines that the Vrect voltage is greater than or equal to the hardware operating voltage threshold, AP 105 can send a disable signal to the power supply switch 106. Upon receiving the disable signal, the power supply switch 106 will not be turned on.

[0091] S109. If the Vrect voltage is less than the hardware operating voltage threshold, the RX IC 102 will not start.

[0092] Understandably, the scenario where the Vrect voltage is less than the hardware operating voltage threshold includes two situations. One is that the Vrect voltage detected in step S101 is not only less than the hardware operating voltage threshold but also less than or equal to the first threshold. In this case, wireless charging is not performed, and the RX IC 102 does not start. The other scenario is that although the Vrect voltage detected in step S101 is greater than the first threshold and less than the hardware operating voltage threshold, under certain extreme conditions, such as extremely low voltage in battery 104, even after the power supply switch 106 is turned on, the Vrect voltage may still not be greater than or equal to the hardware operating voltage threshold. In this case, the RX IC 102 also does not start. Without the RX IC 102 starting, the RX device cannot establish a communication connection with the TX device, and therefore the RX device cannot enter the subsequent wireless charging process.

[0093] Understandably, in other cases, after the user places the aforementioned RX device on top of the aforementioned TX device, although the RX device can initiate the wireless charging process, the positional deviation between the RX device and the TX device results in a lower degree of coupling between them, which in turn leads to lower wireless charging efficiency.

[0094] Therefore, in some embodiments, the wireless charging method described above can also display the coupling strength between devices, thereby prompting the user to check the current wireless charging efficiency of the device, and prompting the user to change the position of the device to improve the wireless charging efficiency, thus enhancing the user experience.

[0095] Therefore, the aforementioned RX device can also output a first prompt, which indicates the coupling strength between the RX device and the TX device. This first prompt may include text, an icon, audio, or a breathing light status. When the coupling strength between the RX device and the TX device is lower than the first strength, the RX device can also output a second prompt, which reminds the user to move the RX device.

[0096] Understandably, after entering the charging process, when the energy emitted by the TX device is constant, the degree of coupling between the RX device and the TX device is strongly correlated with the positional relationship between the devices. The magnitude of the Vrect voltage signal in the RX IC 102 can directly characterize the magnitude of the energy coupled by the RX device, that is, it can directly characterize the degree of coupling between the RX device and the TX device.

[0097] This is because when the TX device wirelessly charges the RX device, it generates an induced current through electromagnetic induction, thus enabling wireless energy transfer. According to the law of electromagnetic induction, when the energy emitted by the TX device is constant, an increase in the distance (including lateral and longitudinal distance) between the transmitting coil and the receiving coil 101 weakens the magnetic field strength. Consequently, the electromotive force induced in the receiving coil 101 decreases, leading to a weaker induced current. This means less energy is transmitted to the receiving end, and thus, the coupling between the TX and RX devices decreases. The reduced alternating current induced in the receiving coil 101, after rectification, also weakens the direct current, resulting in a corresponding decrease in the magnitude of the Vrect voltage signal in the RX IC 102.

[0098] Figure 4 is a graph showing the relationship between the Vrect voltage of RX IC 102 and the X-axis position when the RX device moves laterally on the TX device according to an embodiment of this application; Figure 5 is a graph showing the relationship between the Vrect voltage of RX IC 102 and the Y-axis position when the RX device moves longitudinally on the TX device according to an embodiment of this application. The XY coordinate system above uses the center of the transmitting coil as the origin, and the values ​​of X and Y represent the relative position of the midpoint of the receiving coil 101. As shown in Figures 4 and 5, when the energy transmitted by the TX device is constant, the greater the deviation between the receiving coil 101 and the transmitting coil, that is, the greater the positional deviation between the RX device and the TX device, the lower the coupling strength between the RX device and the TX device, and thus the smaller the Vrect voltage. Therefore, when the energy transmitted by the TX device is constant, the above-mentioned Vrect voltage can be used to characterize the coupling strength between the RX device and the TX device.

[0099] Since the positive correlation between the Vrect voltage and the coupling strength between the devices is based on the assumption that the energy emitted by the TX device is constant, after the RX device enters the wireless charging process, that is, after the RX IC 102 in the RX device sends the first command to the TX device, the RX device can also send a second command to the TX device. This second command instructs the TX device to maintain a constant transmission power, thereby maintaining a constant transmission energy. The RX device can achieve this control through the RX IC 102. Subsequently, the RX device can detect the Vrect voltage after sending the second command and determine the coupling degree between the RX and TX devices based on the magnitude of the Vrect voltage. This detection and determination of the coupling degree are specifically performed by AP 105 in Figure 3.

[0100] Figure 6 is a schematic diagram of a charging dock provided in an embodiment of this application, wherein the transmitting coil of the charging dock is located at the center of the charging dock. Figure 7 is a schematic diagram of a mobile phone provided in an embodiment of this application, wherein the receiving coil 101 of the mobile phone is located at the center of the mobile phone, that is, the largest white circular area in Figure 7. The specific process of the above method will be explained below using the charging dock shown in Figure 6 as the TX device and the mobile phone shown in Figure 7 as the RX device.

[0101] When the phone is placed on the charging dock, it can display a charging animation as shown in Figure 7 after entering the charging process. For example, it can display bubbles to indicate charging. The charging animation ends after the first duration of the animation.

[0102] In the above embodiments, after entering the charging process, the mobile phone can send a second instruction to the charging dock to instruct the charging dock to maintain a constant transmission power for a first duration. It is understood that the mobile phone can instruct the charging dock to increase, maintain, or decrease its transmission power based on the power control instructions in the Qi standard. For example, the power control instruction includes a numerical value: when the value is positive, the charging dock needs to increase its transmission power; when the value is negative, the charging dock needs to decrease its transmission power; when the value is 0, the power control instruction is a second instruction, and the charging dock maintains a constant transmission power. The larger the absolute value of the value, the greater the increase or decrease in transmission power the charging dock needs to achieve. It is understood that the mobile phone sends the power control instruction to the charging dock at a certain frequency; that is, when the mobile phone controls the charging dock to maintain a fixed transmission power, the mobile phone sends a second instruction containing the value "0" to the charging dock at a certain frequency. Therefore, optionally, the mobile phone sending a second instruction to the charging dock to instruct the charging dock to maintain a constant transmission power for a first duration can be achieved by the mobile phone sending the second instruction to the charging dock at a certain frequency within the first duration. Understandably, after the communication connection is established, the mobile phone controls the charging dock to increase the transmission power to enter the wireless charging process, and then the mobile phone can control the charging dock to that transmission power.

[0103] Understandably, in the initial stage of wireless charging, to protect the battery 104 and ensure system stability, the TX device's transmission current is small and relatively constant. Since the transmission power equals the transmission voltage multiplied by the transmission current, optionally, in practical applications, the charging dock can maintain a fixed transmission power by maintaining a fixed transmission voltage. For example, the charging dock can set the aforementioned fixed transmission voltage to 5V.

[0104] Subsequently, the mobile phone can detect the Vrect voltage and determine the degree of coupling between the mobile phone and the charging dock based on the magnitude of the Vrect voltage. Similarly, the above detection can be based on the sampling module 107. Alternatively, the electronic device can also obtain the Vrect voltage of the RX IC 102 via I2C between the AP 105 and the RX IC 102. For example, the mobile phone can divide the Vrect voltage range into four levels, corresponding to four levels of coupling strength between the mobile phone and the charging dock during wireless charging: Vrect ≥ 9V indicates the strongest coupling, 7V ≤ Vrect < 9V indicates a relatively strong coupling, 5V ≤ Vrect < 7V indicates a moderate coupling, and Vrect < 5V indicates a poor coupling. The mobile phone can then obtain the Vrect voltage in real time and determine the current degree of coupling between the mobile phone and the charging dock based on the above correspondence.

[0105] For a mobile phone, the phone can output the aforementioned first prompt via its screen. This first prompt is content displayed on the screen indicating the degree of coupling between the phone (RX device) and the charging dock (TX device). Different coupling degrees result in different content displayed on the screen. For example, as shown in Figure 10, the phone can display a corresponding coupling degree icon (i.e., the aforementioned first prompt) below the battery level of battery 104 on the screen based on the aforementioned coupling degree.

[0106] Figure 8 is a schematic diagram of the coupling strength icons corresponding to different positional relationships of TX and RX provided in an embodiment of this application. As shown in Figure 8, the part filled with diagonal lines represents the mobile phone, and the device obscured by the mobile phone is the charging dock shown in Figure 6. From Figure 8(a) to Figure 8(d), the area obscured by the mobile phone on the charging dock decreases sequentially, that is, the positional deviation between the mobile phone and the charging dock increases sequentially, corresponding to the four levels of coupling strength between the mobile phone and the charging dock in the above example. Therefore, after the mobile phone determines the coupling strength between itself and the charging dock, the mobile phone can display different coupling strength icons at the positions of the coupling strength icons in Figure 7.

[0107] Not limited to the presentation shown in Figure 7, the content displayed on the screen (i.e., the first prompt) may include prompt text and / or prompt icons. The coupling degree icon mentioned above is only one example of a prompt icon.

[0108] Furthermore, when the phone determines that the current coupling between the phone and the charging dock is not at its strongest, that is, when the coupling between the phone and the charging dock is lower than the first strength, the phone can also output a second prompt on the screen, such as a text notification prompting "Please slowly move the phone on the dock to find the best charging position", thereby reminding the user to move the phone to increase the coupling and thus improve charging efficiency.

[0109] Understandably, the display of the first and second prompts mentioned above is updated in real time based on the real-time detection of the Vrect voltage.

[0110] During the wireless charging process described above, the mobile phone can enter normal charging mode after sending a second command to the charging dock to instruct the charging dock to maintain a constant transmission power for a first duration. In normal charging mode, the mobile phone can instruct the charging dock to adjust its transmission power based on changes in the mobile phone's load.

[0111] Understandably, during wireless charging, the phone's load can change (e.g., the battery 104 is fully charged, device power requirements change, etc.) and the phone generates heat during charging. The charging dock can adjust its transmission power based on the phone's control to adapt to the phone's load requirements and ensure the safety of the battery 104 and the phone. This transmission power adjustment mechanism ensures the safety and efficiency of wireless charging. However, during the changes in the charging dock's transmission power, the energy emitted by the charging dock must still be sufficient to support the operation of the RX IC 102 device in the phone. That is, even after the charging dock's transmission power decreases, the Vrect voltage of the RX IC 102 should still be greater than or equal to the aforementioned hardware operating voltage threshold.

[0112] Therefore, after a first duration following the transmission of the second command to the TX device (i.e., the aforementioned charging dock), the phone enters normal charging mode, thereby ensuring the safety and efficiency of wireless charging. Optionally, the phone can control the charging dock to return to normal charging mode by changing the value of the aforementioned power control command. For example, the phone can send "2" to the charging dock as a power control command to increase the charging dock's transmission power; and at the next moment, the phone can send "-1" to the charging dock as a power control command to decrease the charging dock's transmission power. In this way, the phone can enter normal charging mode.

[0113] Understandably, after initiating the charging process, the phone can enter a charging state. This charging state can include a coupling degree detection state and a normal charging state. The coupling degree detection state refers to the charging state when the phone sends a second command to the charging dock to instruct it to maintain a constant transmission power for a first duration. Therefore, optionally, as shown in the example above, after initiating the charging process, the phone can first enter the coupling degree detection state and then enter the normal charging state after the first duration. Optionally, if the phone does not contain the algorithm for determining the coupling degree between the phone and the charging dock based on the magnitude of the Vrect voltage, for example, in some embodiments where the phone only supports the initiation process shown in Figure 3, or for example, in phones in the prior art, then after initiating the charging process, the phone entering the charging state means that the phone directly enters the normal charging state.

[0114] Understandably, in the above example, the RX device is a mobile phone with a screen. However, in some embodiments, the RX device does not include a screen, such as the schematic diagram of the Bluetooth headset shown in Figure 9, but the Bluetooth headset includes a breathing light. In this case, the first indication mentioned above refers to the state of the breathing light, which includes any of the following: breathing light brightness, breathing light color, and breathing light flashing frequency. The state of the breathing light varies depending on the degree of coupling.

[0115] For example, as shown in Figure 10, when the Bluetooth headset determines that the coupling between itself and the charging dock is strongest, the breathing light can be displayed as green; when the Bluetooth headset determines that the coupling between itself and the charging dock is relatively strong, the breathing light can be displayed as blue; when the Bluetooth headset determines that the coupling between itself and the charging dock is moderate, the breathing light can be displayed as orange; and when the Bluetooth headset determines that the coupling between itself and the charging dock is poor, the breathing light can be displayed as red.

[0116] For example, as shown in Figure 11, the breathing light is brightest when the Bluetooth headset determines that the coupling between it and the charging base is strongest; it is relatively bright when the Bluetooth headset determines that the coupling between it and the charging base is moderate; it is moderately bright when the Bluetooth headset determines that the coupling between it and the charging base is poor; and it is dimmer when the Bluetooth headset determines that the coupling between it and the charging base is poor.

[0117] For example, as shown in Figure 12, when the Bluetooth headset determines that its coupling with the charging dock is strongest, the aforementioned breathing light flashes continuously (no flashing); when the Bluetooth headset determines that its coupling with the charging dock is relatively strong, the aforementioned breathing light flashes rapidly; and when the Bluetooth headset determines that its coupling with the charging dock is weak, the aforementioned breathing light flashes slowly. The terms "fast flash" and "slow flash" are only used to distinguish between two different coupling levels and are relative terms.

[0118] Understandably, for the aforementioned Bluetooth headsets, the first prompt can be selected as the second prompt based on the status of the breathing light. For example, if Bluetooth headset A uses the blinking frequency of its breathing light to indicate different levels of coupling with its charging dock, then when the Bluetooth headset determines that the coupling level has not reached its strongest (i.e., the first intensity), it can also use the breathing light color as a second prompt to remind the user to change the position of the Bluetooth headset and the charging dock. For instance, when the coupling level is strongest, the Bluetooth headset's breathing light can be a solid green light, while when the coupling level is not strongest, the Bluetooth headset's breathing light can be a flashing red light, and the flashing speed of the red light decreases as the coupling level decreases.

[0119] Aside from the different way of indicating the coupling degree between the Bluetooth headset and the charging dock through a breathing light, the Bluetooth headset sends a second command after entering the wireless charging process to instruct the charging dock to maintain the transmission power. After sending the second command to the charging dock, it detects the Vrect voltage and determines the coupling degree between the Bluetooth headset and the charging dock based on the magnitude of the Vrect voltage. The process of the Bluetooth headset entering the normal charging state is similar to that of a mobile phone. For specific implementation details, please refer to the relevant description above, which will not be repeated here.

[0120] Understandably, in the above solution, the TX device is a charging dock. It is also understood that the charging dock can act as a wireless power supply device to charge the RX device. In existing solutions, electronic devices can also perform reverse charging. Therefore, as shown in Figure 13, devices with reverse charging capabilities, such as mobile phones, can also serve as the TX device in this embodiment. In this case, in the wireless charging system shown in Figure 13, the aforementioned RX device is a watch.

[0121] Figure 14 is a schematic diagram of the hardware structure of an RX device provided in an embodiment of this application.

[0122] As shown in Figure 14, the device may include components such as a processor 211, a memory 212, a wireless communication processing module 213, a power switch 214, a display screen 215, an audio module 216, a speaker 217, and a wireless charging module 218. The components in the device are connected to each other via a bus and communicate based on the bus.

[0123] Processor 211 may include one or more processing units, such as application processors, modem processors, graphics processors, image signal processors, controllers, video codecs, digital signal processors, baseband processors and / or neural network processors, as well as processor 105 mentioned above. Different processing units may be independent devices or integrated into one or more processors. The controller can generate operation control signals based on instruction opcodes and timing signals to control instruction fetching and execution.

[0124] Memory 212 is coupled to processor 211 and is used to store various software programs and / or multiple sets of instructions. Memory 212 can be used to store computer executable program code, which includes instructions. Processor 211 executes various functional applications and data processing of the device by running the instructions stored in memory 212. Memory may also be provided in processor 211 for storing instructions and data.

[0125] The memory 212 may include one or more random access memories (RAMs) and one or more non-volatile memories. The RAMs can be directly read and written by the processor 211. The RAMs can be used to store executable programs (e.g., machine instructions) of the operating system or other running programs, as well as user and application data. The non-volatile memories can also store executable programs and user and application data. Executable programs, i.e., user data, stored in the non-volatile memories can be pre-loaded into the RAMs for direct reading and writing by the processor 211.

[0126] The executable program code and user data used to implement the wireless charging method provided in this application embodiment can be stored in non-volatile memory. During the implementation of the above wireless charging method, the device can load the executable program code and user data from the non-volatile memory into random access memory, enabling the RX device to achieve wireless charging functionality with a low degree of coupling to the TX device, thereby significantly improving the user's freedom and experience when using wireless charging.

[0127] The wireless communication processing module 213 can provide wireless communication solutions including WLAN, such as Wi-Fi, Bluetooth communication, ZigBee communication, NFC communication, infrared communication, and UWB communication.

[0128] The power switch 214 can be used to control the power supply (such as battery 104) to the device, thereby supplying power to the processor 211, memory 212, wireless communication processing module 213, display screen 215, audio module 216, speaker 217, etc.

[0129] A display screen 215 is used for display. The display screen 215 includes a display panel. The device can implement display functions through a GPU, the display screen 215, and an application processor. In this embodiment, the device can use the display functions provided by the GPU, the display screen 215, and the application processor to output the aforementioned first and second prompts to the user via the display, thereby indicating the current coupling degree between the devices and prompting the user to change the relative position between the devices to obtain a higher coupling degree. A touch sensor can be provided in the display screen 215. The touch sensor is used to detect touch operations applied to or near it. The touch sensor can transmit the detected touch operation to the application processor to determine the touch event type. Furthermore, the RX device can provide visual output related to the touch operation through the display screen 215. The RX device can implement display functions through a GPU, the display screen 215, the touch sensor, and the application processor.

[0130] Audio module 216 can be used to convert digital audio signals into analog audio signals for output, and can also be used to convert analog audio input into digital audio signals. Speaker 217 can be used to convert the audio signals transmitted by audio module 216 into sound signals. The device can implement audio playback functions through audio module 216, speaker 217, etc. In some embodiments, the aforementioned first prompt may include an audio signal. In some embodiments, audio module 216 may also include a microphone for converting sound signals into electrical signals.

[0131] The wireless charging module 218 includes the aforementioned RX IC 102, receiving coil 101, DC-DC converter 103, and other structures. The wireless charging module 218 senses the electromagnetic field of the transmitting device and converts the electromagnetic energy into stable electrical energy input, which is then stored in the battery 104. In this embodiment, the wireless charging module 218 also includes a power switch 106 and a sampling module 107 as shown in FIG3. This ensures that when the energy received by the receiving coil 101 is insufficient to support the startup of the RX IC 102 (i.e., when the Vrect voltage is greater than a first threshold but less than a hardware operating voltage threshold), the battery 104 supplies power to the RX IC 102 to start it. This enables the RX device and the TX device to establish a communication connection before wireless charging, thus initiating the wireless charging process.

[0132] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the device. In other embodiments of this application, the device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. Components may be implemented in hardware, software, or a combination of software and hardware.

[0133] Those skilled in the art will recognize that the functions described in the embodiments of this application in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer. Embodiments of this application also provide a computer program product, including a computer program that, when run on a processor, implements the steps in the various method embodiments described above.

[0134] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A wireless charging device, characterized in that, It includes a receiving coil 101, a receiving integrated circuit RX IC 102, a DC-DC converter 103, a battery 104, a processor 105, a power supply switch 106, and a sampling module 107; The input terminal of the DC-DC converter 103 is connected to the receiving coil 101 through the RX IC 102, and the output terminal of the DC-DC converter 103 is connected to the input terminal of the battery 104. One end of the power supply switch 106 is connected to the output terminal of the battery 104, and the other end of the power supply switch 106 is connected to the RX IC 102; The processor 105 is connected to the RX IC 102 through the sampling module 107. The sampling module 107 is used to detect the first voltage of the RX IC 102. The first voltage is the DC voltage obtained after rectification of the AC power output by the receiving coil 101. The first voltage is used to power the RX IC 102. The processor 105 is also connected to the control terminal of the power supply switch 106, and is used to control the power supply switch 106 to connect the battery 104 to the RX IC 102 and supply power to the RX IC 102 when the first voltage is less than the start-up voltage of the RX IC 102 and greater than the first threshold. The RX IC 102 is used to send a first instruction to the wireless power supply device, the first instruction being used to initiate the charging process.

2. The wireless charging device according to claim 1, characterized in that, The processor 105 is further configured to control the power supply switch 106 to disconnect the circuit between the battery 104 and the RX IC 102 when the first voltage is greater than or equal to the startup voltage of the RX IC 102.

3. The wireless charging device according to any one of claims 1-2, characterized in that, The RX IC 102 is also configured to send a second instruction to the wireless power supply device after sending a first instruction to the wireless power supply device, the second instruction being configured to instruct the wireless power supply device to maintain a constant transmission power for a first duration; The receiver processor 105 is used to send the second instruction to the wireless power supply device, detect the first voltage, and determine the degree of coupling between the wireless charging device and the wireless power supply device based on the magnitude of the first voltage.

4. The wireless charging device according to claim 3, characterized in that, The wireless charging device outputs a first prompt, which indicates the degree of coupling between the wireless charging device and the wireless power supply device.

5. The wireless charging device according to claim 4, characterized in that, The first notification may include text, an icon, audio, or a breathing light status.

6. The wireless charging device according to claim 4 or 5, characterized in that, If the coupling strength is lower than the first strength, the processor 105 outputs a second prompt message, which is used to remind the user to move the wireless charging device.

7. The wireless charging device according to any one of claims 3-6, characterized in that, After the first duration of sending the second instruction to the wireless power supply device, the wireless charging device enters the normal charging state.

8. A wireless charging method, characterized in that, An application is made in a wireless charging device, the wireless charging device including a receiving coil 101, a receiving integrated circuit RXIC 102, a DC-DC converter 103, a battery 104, a processor 105, a power switch 106, and a sampling module 107; wherein, the input terminal of the DC-DC converter 103 is connected to the receiving coil 101 through the RXIC 102, and the output terminal of the DC-DC converter 103 is connected to the input terminal of the battery 104; one end of the power switch 106 is connected to the output terminal of the battery 104, and the other end of the power switch 106 is connected to the RXIC 102; the processor 105 is connected to the RXIC 102 through the sampling module 107, and the processor 105 is also connected to the control terminal of the power switch 106, the method including: The first voltage of the RX IC 102 is detected. The first voltage is the DC voltage obtained after rectification of the AC power output by the receiving coil 101. The first voltage is used to power the RX IC 102. When the first voltage is less than the startup voltage of the RX IC 102 but greater than the first threshold, the power supply switch 106 is controlled to connect the battery 104 to the RX IC 102 to supply power to the RX IC 102. After the RX IC 102 is started, it sends a first instruction to the wireless power supply device, which is used to start the charging process.

9. The method according to claim 8, characterized in that, The method further includes: When the first voltage is greater than or equal to the startup voltage of the RX IC 102, the power supply switch 106 is controlled to disconnect the circuit between the battery 104 and the RX IC 102.

10. The method according to any one of claims 8-9, characterized in that, After sending the first command to the wireless power supply device, the method further includes: Send a second instruction to the wireless power supply device, the second instruction being used to instruct the wireless power supply device to maintain a constant transmission power for a first duration; After sending the second command to the wireless power supply device, the first voltage is detected, and the degree of coupling between the wireless charging device and the wireless power supply device is determined based on the magnitude of the first voltage.

11. The method according to claim 10, characterized in that, The method further includes: Output a first prompt, which is used to indicate the degree of coupling between the wireless charging device and the wireless power supply device.

12. The method according to claim 11, characterized in that, The first notification may include text, an icon, audio, or a breathing light status.

13. The method according to claim 11 or 12, characterized in that, The method further includes: If the coupling strength is lower than the first strength, the processor 105 outputs a second prompt message, which is used to remind the user to move the wireless charging device.

14. The method according to any one of claims 10-13, characterized in that, The method further includes: After the first duration of sending the second instruction to the wireless power supply device, the wireless charging device enters the normal charging state.

15. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is run on an electronic device, it causes the method described in any one of claims 8-14 to be performed.

16. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 8-14.

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