CN118040855A

CN118040855A - Wireless charging circuit, device, method and computer readable storage medium

Info

Publication number: CN118040855A
Application number: CN202410441375.5A
Authority: CN
Inventors: 王会文
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2024-04-12
Filing date: 2024-04-12
Publication date: 2024-05-14

Abstract

The application provides a wireless charging circuit, wireless charging equipment, wireless charging method and a computer readable storage medium, and relates to the technical field of terminals. The wireless charging circuit comprises a power management module, a switch, a capacitor and a plurality of inductors, wherein the capacitor is coupled with the plurality of inductors through the switch, and each inductor in the capacitor and the plurality of inductors respectively form a plurality of resonant circuits. The different resonant circuits share the capacitor, which can reduce the volume and the manufacturing cost. The switch is used for conducting connection between the capacitor and one inductor in the plurality of inductors, the power management module is respectively connected with each resonant circuit and outputs alternating current with the working frequency matched with the resonant frequency of the target resonant circuit, so that the target resonant circuit starts to oscillate, wireless charging of the powered equipment is realized, and connection and conduction between the capacitor and the inductor in the target resonant circuit are realized. The inductor in each resonant circuit can be designed according to actual requirements, so that the structure of the wireless charging circuit has higher flexibility.

Description

Wireless charging circuit, device, method and computer readable storage medium

Technical Field

The present application relates to the field of terminal technologies, and in particular, to a wireless charging circuit, a wireless charging device, a wireless charging method, and a computer readable storage medium.

Background

With the development of wireless power transmission technology, wireless charging technology has emerged. Because wireless charging technology can charge through non-contact mode, consequently possess higher security, reliability and life.

A common charging mode in a wireless charging device is resonance, and specifically, the wireless charging device may output an alternating current with a working frequency, so that a resonance circuit formed by a capacitor and an inductor starts to oscillate to realize wireless charging. However, since the wireless charging device can only output an ac current of one operating frequency, in the case where the wireless charging device includes a plurality of resonant circuits, there is a problem in that the hardware configuration of the resonant circuits is limited by the operating frequency of the ac current to be output, and there is a further problem in that the manufacturing cost of the wireless charging device is high.

Disclosure of Invention

In view of the above, the present application provides a wireless charging circuit, a wireless charging device, a wireless charging method, and a computer readable storage medium, which can avoid the limitation of the hardware structure of the resonant circuit of the wireless charging device to the operating frequency of the alternating current required to be output.

In a first aspect, the present application provides a wireless charging circuit comprising a power management module, a switch, a capacitor, and a plurality of inductors;

The capacitor is coupled with the plurality of inductors through the switch, and the capacitor and each inductor in the plurality of inductors respectively form a plurality of resonant circuits; a switch for conducting a connection between the capacitor and one of the plurality of inductors;

The power management module is connected with each resonant circuit and is used for outputting alternating current with the working frequency matched with the resonant frequency of the target resonant circuit; the connection between the capacitor and the inductor in the target resonant circuit is conductive.

In the above implementation, the capacitor is coupled to the plurality of inductors through the switch, respectively, and may form a plurality of resonant circuits. Under the condition that the switch is in different conducting states, the connection between the capacitor and different inductors is conducted, the corresponding resonant circuit is conducted, at the moment, the power management module can output alternating current matched with the resonant frequency of the conducted target resonant circuit, and therefore the target resonant circuit can start to oscillate to achieve wireless charging.

In addition, in the wireless charging circuit, only one capacitor is arranged, so that different resonant circuits can be formed by coupling with different inductors respectively, and wireless charging of power receiving devices with different specifications is realized. Therefore, in the wireless charging circuit capable of realizing the power receiving devices with different specifications, the manufacturing cost of the wireless charging circuit can be reduced, and the volume of the wireless charging circuit can be reduced.

In addition, the working frequency of the alternating current output by the power management module is matched with the resonant frequency of the target resonant circuit, so that the charging efficiency of the wireless charging circuit can be kept at a higher level under the condition that each resonant circuit is conducted. In addition, under the condition that the power management module can output alternating current with the working frequency matched with the resonant frequency of the target resonant circuit, the wireless charging circuit can be guaranteed to realize efficient wireless charging on the powered equipment under the condition that the inductor is limited by space.

In a possible implementation manner of the first aspect, inductance values of at least two inductors of the plurality of inductors are different. When a plurality of inductors and one capacitor form a plurality of resonant circuits, the magnetic flux density generated by the inductors having different inductance values is different, and thus the induced voltage is also different, for example, when the magnetic flux density generated by the inductor having a large inductance value is high, the induced voltage generated is high. Therefore, under the condition that the inductance values of at least two inductors in the plurality of inductors are different, the wireless charging circuit can generate different charging voltages, and the charging requirements of different powered devices are met.

In a possible implementation manner of the first aspect, the resonant frequencies of at least two resonant circuits are different among the plurality of resonant circuits. In the case where the plurality of resonance circuits share the same capacitor, the resonance circuits of at least two resonance circuits are different, indicating that the inductance values of at least two inductors are different. Therefore, the wireless charging circuit can be ensured to meet the charging requirements of different powered devices.

In a possible implementation manner of the first aspect, the power management module includes a control port, and the control port is connected to the switch and is configured to output a control signal for controlling a conducting state of the switch.

The on state of the switch refers to the on state between the switch-connected capacitor and the inductor. A switch may be considered to be in a conductive state when the connection between the capacitor to which the switch is connected and the inductor is in a conductive state. Since the wireless charging circuit has a plurality of inductors, each of which is connected to the capacitor through a switch, the switch has a plurality of conductive states. And the number of on states of the switch is related to the number of inductors. For example, when the switch is in one conductive state, the connection between the capacitor to which the switch is connected and one inductor is in a conductive state, and when the switch is in the other conductive state, the connection between the capacitor to which the switch is connected and the other inductor is in a conductive state.

In the implementation manner, the power management module can directly output a control signal for controlling the switch to the switch through the control port, so that the control of the conduction states of different resonant circuits is realized. The power management module enables one of the resonance circuits to be in a conducting state through the control switch, so that the wireless charging circuit can wirelessly charge the powered device in the charging area corresponding to the resonance circuit.

In a second aspect, the present application provides a wireless charging device, where the wireless charging device includes a wireless charging circuit, a plurality of charging areas, and a powered device detection module according to the first aspect and any one of the possible designs thereof;

The power receiving equipment detection module is connected with the power management module in the wireless charging circuit and is used for detecting the in-place condition of the power receiving equipment in the plurality of charging areas;

the power management module is used for determining a target resonant circuit corresponding to the target charging area according to the in-place condition and outputting alternating current with the working frequency matched with the resonant frequency of the target resonant circuit; the target charging area is a charging area in which the powered device is in place;

and a target resonance circuit for generating oscillation based on the alternating current to supply power to the power receiving apparatus.

In the implementation manner, since the working frequency of the alternating current output by the power management module is matched with the resonant frequency of the target resonant circuit, the charging efficiency of the wireless charging device can be ensured to be kept at a higher level under the condition that each resonant circuit is conducted. In addition, under the condition that the power management module can output alternating current with the working frequency matched with the resonant frequency of the target resonant circuit, the wireless charging equipment can be ensured to realize efficient wireless charging on the power receiving equipment under the condition that the inductor in the wireless charging circuit is limited by space.

In addition, because the power management module can output alternating current with the working frequency matched with the resonant frequency of the target resonant circuit, all resonant circuits in the wireless charging circuit in the wireless charging equipment can share the same capacitor, the manufacturing cost of the wireless charging circuit can be reduced, and the volume of the wireless charging circuit is reduced. And the inductor in each resonant circuit can be designed according to the actual space, so that the wireless charging equipment can generate different charging voltages on the premise of meeting the requirement of hardware space, and the charging requirements of different power receiving equipment are met.

In a possible implementation manner of the second aspect, the wireless charging device further includes a processor, and the processor includes a control port, and the control port is connected to the switch and is configured to output a control signal for controlling an on state of the switch.

In the implementation process, the wireless charging device can control the conduction states of different resonant circuits through the control signals of the switch conduction states controlled by the processor. Each conductive state of the switch corresponds to a conductive state of one of the resonant circuits. For example, one resonant circuit is in a conductive state when the switch is in one conductive state, and the other resonant circuit is in a conductive state when the switch is in the other conductive state.

In a third aspect, the present application provides a wireless charging method applied to a wireless charging apparatus, the wireless charging apparatus including a plurality of charging areas that can charge a plurality of power receiving apparatuses, each charging area being provided with a resonance circuit;

The wireless charging method comprises the following steps:

Responsive to the target charging zone having the powered device in place, a resonant frequency of a resonant circuit of the target charging zone is determined. Wherein, the presence of the power receiving device means that the power receiving device can perform wireless charging in the target charging area. The target charging area is a charging area where a powered device is in place, and the wireless charging device includes a plurality of charging areas. And outputting alternating current with the working frequency matched with the resonant frequency to the resonant circuit of the target charging area. Each target charging area corresponds to a resonant circuit, and under the condition that alternating current with the working frequency matched with the resonant frequency is input into the resonant circuit, the resonant circuit can start to oscillate so as to realize wireless charging.

In the above implementation manner, when the power receiving device is in place in the target charging area, the resonant frequency of the resonant circuit in the target charging area may be determined, and according to the resonant frequency, an ac current with a working frequency matching the resonant frequency may be output to the resonant circuit corresponding to the target charging area, so as to ensure that the charging efficiency of the resonant circuit corresponding to the target charging area is at a higher level.

In addition, the structural design of the wireless charging equipment using the wireless charging method is more flexible, and the manufacturing cost is reduced conveniently. In addition, by the wireless charging method provided by the embodiment of the application, the volume of the wireless charging equipment can be smaller.

In a possible implementation manner of the third aspect, the method further includes: the presence of a powered device in a plurality of charging areas is detected. A target charging zone is determined from the plurality of charging zones based on the bit condition. By detecting the presence condition of the powered device in each charging area, the target charging area can be determined when the powered device is in place, so that the output of alternating current to the resonant circuit corresponding to the target charging area is controlled, and the output of the alternating current to the resonant circuit corresponding to the charging area without the powered device in place can be avoided, thereby avoiding the waste of electric energy.

In a possible implementation manner of the third aspect, determining the target charging area from the plurality of charging areas based on the in-place situation includes: determining one charging area as a target charging area when one charging area exists and a power receiving device exists in the plurality of charging areas; when a plurality of charging areas exist and a power receiving device is in place, a target charging area is determined from the plurality of charging areas according to a preset rule.

In the above implementation manner, in order to ensure that charging can be performed normally when a plurality of charging areas each have a power receiving device in place, one target charging area may be determined from the charging areas each having the power receiving device in place, so that it is ensured that an ac current may be output to a resonant circuit corresponding to the target charging area, so that the power receiving device in the target charging area is normal.

In a possible implementation manner of the third aspect, the preset rule includes, but is not limited to: sequentially determining each charging area in the plurality of charging areas as a target charging area according to a preset time interval; or determining a charging area corresponding to the powered device with the least residual electric quantity as a target charging area.

In the implementation process, the target charging area may be determined by a preset rule, so that when a plurality of powered devices are in place at the same time, one powered device may be selected from the plurality of powered devices to perform wireless charging.

In a fourth aspect, the present application provides a wireless charging device comprising a memory and one or more processors; the memory is coupled to the processor; the memory is for storing computer program code, the computer program code comprising computer instructions; the computer instructions, when executed by a processor, cause the wireless charging device to perform the method as described in the third aspect and any one of its possible designs.

In a fifth aspect, the present application provides a computer readable storage medium comprising computer instructions which, when run on a wireless charging device, cause the wireless charging device to perform the method of the third aspect and any one of its possible designs.

In a sixth aspect, the present application provides a computer program product comprising computer programs/instructions which, when executed by a processor, cause the wireless charging device to perform the method of the third aspect and any one of its possible designs.

In a seventh aspect, the present application provides an apparatus for inclusion in a wireless charging device, the apparatus having functionality to implement the wireless charging device behaviour in any of the above aspects and possible implementations. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes at least one module or unit corresponding to the functions described above. Such as a detection module or unit, a scanning module or unit, a recycling module or unit, a movement module or unit, and a storage module or unit, etc.

In an eighth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, where the method is used to implement any one of the methods provided in the third to fifth aspects. The chip system may be formed of a chip or may include a chip and other discrete devices.

It will be appreciated that the wireless charging device according to the second aspect and any of the possible designs thereof, the computer readable storage medium according to the fifth aspect, and the computer program product according to the sixth aspect are all configured to perform the corresponding methods provided above, and therefore, the advantages achieved by the method are referred to the advantages in the corresponding methods provided above, and will not be repeated herein.

Drawings

Fig. 1 is a schematic diagram of a tablet computer according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a wireless charging device according to an embodiment of the present application;

fig. 3 is a schematic diagram of a wireless charging device according to a second embodiment of the present application;

Fig. 4 is a schematic circuit topology diagram of a wireless charging device according to an embodiment of the present application;

fig. 5 is a schematic flow chart of a wireless charging method according to an embodiment of the present application.

Detailed Description

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present embodiment, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Before describing the embodiments of the present application, first, a detailed description is given of the technology related to the embodiments of the present application.

1. The wireless power transmission is also called wireless power transmission and non-contact power transmission, and refers to the fact that the transmitter converts power into relay energy in other forms such as electromagnetic field energy, laser, microwaves and mechanical waves, and the relay energy is converted into power again by the receiver after being transmitted at intervals for a certain distance, so that wireless power transmission is achieved.

2. The wireless charging technology is derived from a wireless power transmission technology, and is a technology for realizing a charging process by utilizing wireless power transmission. The wireless charging device and the power receiving device are both provided with coils. When the wireless charging device starts to charge, the coil in the wireless charging device can convert electric energy into electromagnetic field energy. Then, a coil provided in the power receiving apparatus may receive the electromagnetic field energy and convert the electromagnetic field energy into electric energy. In this way, electric energy is transmitted from the wireless charging device to the power receiving device, which stores or uses the electric energy, thereby realizing wireless charging.

In some embodiments, a plurality of coils may be provided in the wireless charging device to enable charging of a plurality of powered devices of different charging specifications. For example, in some scenarios, the wireless charging device is a tablet computer, and the powered device is a peripheral such as a stylus and a wireless keyboard. The tablet personal computer is provided with a wireless charging device, and the wireless charging device forms a charging area on the shell of the tablet personal computer. The peripheral devices such as the handwriting pen and the wireless keyboard can be adsorbed to the wireless charging area on the shell of the tablet personal computer in a magnetic attraction and buckling mode, and therefore the tablet personal computer can charge the peripheral devices such as the handwriting pen and the wireless keyboard in a wireless mode.

As shown in fig. 1, a display screen is disposed on the front surface of the tablet computer. The wireless charging device is used for charging the wireless keyboard, the first coil is arranged on the back of the tablet personal computer, the first coil can form a first charging area 101 at the shell of the back of the tablet personal computer, and a magnetic attraction area 102 for adsorbing the wireless keyboard is further arranged at the shell of the back of the tablet personal computer. Correspondingly, a magnetic attraction area with the polarity opposite to that of the magnetic attraction area 102 is also arranged on the wireless keyboard, so that the wireless keyboard can be attracted to the first charging area 101 at the back shell of the tablet personal computer in a magnetic attraction mode, and the first charging area 101 of the tablet personal computer can be used for charging the wireless keyboard. The second coil for charging the handwriting pen in the wireless charging device is arranged on the side surface of the tablet personal computer, the second coil can form a second charging area 103 at the side surface shell of the tablet personal computer, and in addition, a magnetic attraction area 104 for adsorbing the handwriting pen is further arranged at the side surface shell of the tablet personal computer. Correspondingly, a magnetic attraction area with the polarity opposite to that of the magnetic attraction area 104 is also arranged on the handwriting pen, so that the handwriting pen can be attracted to the second charging area 103 at the side surface shell of the tablet personal computer in a magnetic attraction mode, and the second charging area 103 of the tablet personal computer can charge the handwriting pen.

Wireless charging techniques may utilize a resonant device to achieve wireless charging.

In some embodiments, each charging region corresponds to one resonant circuit, and each resonant circuit corresponds to one powered device. Each resonant circuit comprises at least one capacitor and one inductor.

In the resonant circuit, in order to ensure the highest charging efficiency of the resonant circuit and avoid energy waste, it is necessary to ensure that the working frequency of the alternating current output by the power output module is equal to or close to the resonant frequency of the resonant circuit formed by the capacitor and the inductor. If the operating frequency of the ac current output by the power output module is equal to the resonant frequency of the resonant circuit formed by the capacitor and the inductor, the current value in the circuit is the largest, and the circuit may be damaged.

Further, the area of the wireless keyboard that can be in contact with the tablet computer is larger, and the area of the stylus that can be in contact with the tablet computer is smaller, so, as shown in fig. 1, the area of the first charging area 101 for charging the wireless keyboard is larger than the area of the second charging area 103 for charging the stylus. That is, the volume of the inductor corresponding to the first charging region 101 is larger than the volume of the inductor corresponding to the second charging region 103, and thus the inductance value of the inductor corresponding to the first charging region 101 is larger than the inductance value of the inductor corresponding to the second charging region 103.

As can be seen from the above, if the wireless charging device needs to charge the power receiving devices with different charging specifications, the wireless charging device needs to correspondingly set up inductors with different sizes.

Further, the power output module can only output alternating current with one working frequency, and the difference between the working frequency of the alternating current output by the power output module and the resonance frequency of the resonance circuit formed by the capacitor and the inductor is larger than zero and smaller than a preset threshold value, so that higher charging efficiency can be ensured. Then, under the condition that inductors with different sizes are arranged in the wireless charging equipment, in order to ensure that the charging efficiency of the resonant circuit where each inductor is positioned is highest, the resonant frequency required to be set by the resonant circuit is determined according to the working frequency of the alternating current output by the power output module, and then the capacitance value of the capacitor in each resonant circuit is determined based on the inductance value of the inductor in each resonant circuit and the resonant frequency. Therefore, the wireless charging device can supply power to the power receiving devices with different specifications under the condition that the power output module outputs alternating current with one working frequency.

The resonant frequency of the resonant circuit is related to the capacitance value of the capacitor and the inductance value of the inductor, and is an inherent feature of the resonant circuit. The following resonant frequency calculation formula is specific:

Wherein, Represents the resonant frequency, L represents the inductance value, C represents the capacitance value,

For example, in the case where the inductance value of the inductor in the resonant circuit corresponding to the stylus pen is 20Uh, the inductance value of the inductor in the resonant circuit corresponding to the wireless keyboard is 10Uh, and the operating frequency of the alternating current output by the power output module is 103 KHz. According to the resonant frequency calculation formula, under the condition that the capacitance value of the capacitor in the resonant circuit corresponding to the handwriting pen is 113nF, the resonant frequency of the resonant circuit corresponding to the handwriting pen is 105KHz, and at the moment, the charging efficiency of the handwriting pen can be ensured to be higher. According to the resonance frequency calculation formula, under the condition that the capacitance value of the capacitor in the resonance circuit corresponding to the wireless keyboard is 247nF, the resonance frequency of the resonance circuit corresponding to the wireless keyboard is 101KHz, and at the moment, the charging efficiency of the wireless keyboard can be ensured to be higher.

That is, in the above-described wireless charging scheme, in order to ensure that the wireless charging apparatus can supply power to power receiving apparatuses of different specifications, it is necessary to set the size of the inductor according to the volumes of the wireless charging apparatus and the power receiving apparatus. The capacitor is then configured correspondingly to the inductor provided for each resonant circuit. As such, the wireless charging scheme is limited by hardware, and cannot be flexibly configured, and each resonant circuit needs to configure capacitors with different sizes according to the size of the inductor, resulting in higher manufacturing cost of the wireless charging device. Furthermore, the wireless charging device needs to provide a housing space for hardware in the resonant circuit, making it difficult to further reduce the volume of the wireless charging device.

Therefore, the application provides a wireless charging method, which can determine the resonance frequency of a resonant circuit corresponding to a target charging area where the power receiving equipment is located by detecting the in-place condition of the power receiving equipment in the charging area, and then output alternating current with the working frequency matched with the resonance frequency, so that the charging efficiency of each target charging area can be ensured to be in a higher level. In addition, the hardware structure of the wireless charging device adopting the wireless charging method is not limited by the working frequency of alternating current, so that the design of the hardware structure can be more flexible, and the manufacturing cost and the volume of the wireless charging device can be reduced according to actual requirements.

The wireless charging method provided by the embodiment of the application can be applied to wireless charging equipment. The wireless charging device may be a wireless charger, a mobile phone, a tablet computer, a smart screen, a notebook computer, a vehicle-mounted device, a wearable device (such as a smart watch), an ultra-mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), an artificial intelligence (ARTIFICIAL INTELLIGENCE) device, and the like, which have a wireless charging and power supply function. The application embodiments are not limited to a particular type of wireless charging device 100. Also, in the case where an operating system is installed in the wireless charging apparatus, there is no limitation on the operating system installed in the wireless charging apparatus.

Hereinafter, the wireless charging device is described.

As shown in fig. 2, in the case where the wireless charging device is a wireless charger, the wireless charger may include a power management module, a plurality of resonance circuits, and a powered device detection module. The charging area corresponding to each resonance circuit is provided with a powered device detection module, and the powered device detection module can detect whether the powered device exists in the charging area or not. When the power receiving device detection module detects that a power receiving device is in place in a certain charging area, the power management module can output current correspondingly. The working frequency of the current output by the power management module corresponds to the resonant frequency of the resonant circuit corresponding to the charging area where the powered device is located.

In some examples, the powered device detection module may be a magnetic sensor that may detect whether the powered device is in place by, for example, whether the powered device is stuck in a charging region.

The matching of the working frequency of the current output by the power management module and the resonant frequency of the resonant circuit corresponding to the charging area where the powered device is located means that the difference between the working frequency of the current output by the power management module and the resonant frequency of the resonant circuit corresponding to the charging area where the powered device is located is greater than zero and less than a preset threshold value.

In the case that the wireless charging device is a terminal device such as a mobile phone, a tablet computer, a smart screen, a notebook computer, a vehicle-mounted device, etc., as shown in fig. 3, the wireless charging device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charge management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a sensor module 180, an indicator 192, a camera, a display screen, etc.

It should be understood that the illustrated structure of the embodiment of the present application does not constitute a specific limitation on the wireless charging apparatus 100. In other embodiments of the application, wireless charging device 100 may include more or less components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, such as: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (IMAGE SIGNAL processor, ISP), a controller, a memory, a video codec, a digital signal processor (DIGITAL SIGNAL processor, DSP), a baseband processor, and/or a neural Network Processor (NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

The controller may be a neural hub and a command center of the wireless charging device 100, among others. The controller can generate operation control signals according to the instruction operation codes and the time sequence signals to finish the control of instruction fetching and instruction execution.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 110 is reduced, thereby improving the efficiency of the system.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to enable expansion of the memory capabilities of the wireless charging device 100. The external memory card communicates with the processor 110 through an external memory interface 120 to implement data storage functions.

The internal memory 121 may be used to store computer executable program code including instructions. The processor 110 executes various functional applications of the wireless charging device 100 and data processing by executing instructions stored in the internal memory 121. The internal memory 121 may include a storage program area and a storage data area. The storage program area may store an application program (such as a sound playing function, an image playing function, etc.) required for at least one function of the operating system, etc. The storage data area may store data created during use of the wireless charging device 100 (e.g., audio data, phonebook, etc.), and so on. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (universal flash storage, UFS), and the like.

In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an integrated circuit (inter-INTEGRATED CIRCUIT, I2C) interface, an integrated circuit built-in audio (inter-INTEGRATED CIRCUIT SOUND, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (universal asynchronous receiver/transmitter, UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (subscriber identity module, SIM) interface, and/or a universal serial bus (universal serial bus, USB) interface, among others.

The USB interface 130 is an interface conforming to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. The USB interface 130 may be used to connect a charger to charge the wireless charging device 100, and may also be used to transfer data between the wireless charging device 100 and a peripheral device.

It should be understood that the interfacing relationship between the modules illustrated in the embodiment of the present application is only illustrative, and does not limit the structure of the wireless charging device 100. In other embodiments of the present application, the wireless charging device 100 may also use different interfaces in the above embodiments, or a combination of interfaces.

The charge management module 140 is configured to receive a charge input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charge management module 140 may receive a charging input of a wired charger through the USB interface 130. In some wireless charging embodiments, the charge management module 140 may receive wireless charging input through a wireless charging coil of the wireless charging device 100. The charging management module 140 may also supply power to the wireless charging device 100 itself through the power management module 141 while charging the battery 142.

The power management module 141 is configured to be connected to the battery 142, and the power management module 141 receives input from the battery 142 and/or the charge management module 140 to power the processor 110, the internal memory 121, the external memory, the display, the camera, the wireless communication module 160, and the like. The power management module 141 may also be configured to monitor battery capacity, battery cycle number, battery health (leakage, impedance) and other parameters. In other embodiments, the power management module 141 may also be provided in the processor 110. In other embodiments, the power management module 141 and the charge management module 140 may be disposed in the same device.

In some wireless powered embodiments, the charge management module 140 may send power through the wireless power coil of the wireless charging device 100 to power other powered devices. In an embodiment of the present application, the power management module 141 may output currents of various operating frequencies.

The sensor module 180 may detect whether a powered device is in place in a charging area of the wireless charging device 100. In the case where the sensor module 180 detects that a powered device is in place in a charging area, the power management module 141 may output an ac current accordingly. The operating frequency of the current output by the power management module 141 is matched with the resonant frequency of the resonant circuit corresponding to the charging area in which the powered device is located.

The sensor module 180 may specifically be a magnetic sensor 180D. The magnetic sensor 180D includes a hall sensor. Wireless charging device 100 may detect whether a powered device is in place in the charging area using magnetic sensor 180D.

The indicator 192 may be an indicator light, may be used to indicate a state of charge, a change in charge, a message indicating a missed call, a notification, etc.

In the embodiment of the present application, the wireless communication function of the wireless charging device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor, the baseband processor, and the like. The display function of the wireless charging device 100 may be implemented by a GPU, a display screen, an application processor, or the like. The audio functions provided by the wireless charging device 100 may be implemented by an audio module 170, a speaker, a receiver, a microphone, an earphone interface, an application processor, and the like. Reference may be made specifically to the related art, and details thereof are not repeated here.

The wireless charging circuit provided by the embodiment of the application is described below.

The embodiment of the application still takes the wireless charging equipment as the tablet personal computer, and the tablet personal computer can supply power for the handwriting pen and the wireless keyboard in a wireless charging mode for illustration. The wireless charging circuit as shown in fig. 4 includes a power management module, a single pole double throw switch K, a capacitor C, a first inductor L1, and a second inductor L2. The power management module can output alternating currents with different working frequencies.

When the endpoint 1 and the endpoint 2 of the single pole double throw switch K are conducted, the tablet computer can charge the handwriting pen. The power management module can output alternating current I1 with the working frequency being the first frequency, a resonant circuit formed by the capacitor C and the first inductor L1 starts to oscillate, and the first inductor L1 can convert electric energy into electromagnetic field energy, so that an electromagnetic field is generated around the first inductor L1. At this time, if the stylus pen is adsorbed in the charging area corresponding to the first inductor L1, the electromagnetic field converted by the first inductor L1 can be converted into electric energy by the stylus pen and stored in the energy storage battery in the stylus pen.

When the endpoint 1 and the endpoint 3 of the single pole double throw switch K are on, the tablet computer can charge the wireless keyboard. The power management module can output alternating current I2 with the working frequency being the second frequency, a resonant circuit formed by the capacitor C and the second inductor L2 starts to oscillate, and the second inductor L2 can convert electric energy into electromagnetic field energy, so that an electromagnetic field is generated around the second inductor L2. At this time, if the wireless keyboard is adsorbed in the charging area corresponding to the second inductor L2, the electromagnetic field converted by the second inductor L2 can be converted into electric energy by the wireless keyboard and stored in the energy storage battery in the wireless keyboard.

It will be appreciated that a plurality of resonant circuits may be included in the wireless charging circuit, wherein the resonant frequencies of at least two of the resonant circuits may be different.

Accordingly, in the case where a plurality of resonance circuits are included in the wireless charging circuit, the wireless charging circuit includes a switch for turning on one of the plurality of resonance circuits.

In some embodiments, the power management module may include a control port for controlling the switch, the control port being coupled to the switch such that the power management module controls the switch through the control port. For example, when the power management module detects that the charging area corresponding to the resonant circuit a has the powered device in place, the power management module may control the switch through the control port, so that the resonant circuit a is in a conductive state.

In the above embodiment, the control port may output a control signal for controlling the on state of the switch. The on state of the switch refers to the state in which the switch connects the capacitor and the target inductor. The on state of the switch corresponds to the number of resonant circuits or the number of inductors. For example, a switch connects a capacitor and a plurality of inductors, and when the switch is in a first conductive state, a connection between the capacitor and a first one of the plurality of inductors is conductive, a connection between the capacitor and the other inductors is disconnected, and a first resonant circuit formed by the capacitor and the first one of the plurality of inductors is conductive. When the switch is in the second conductive state, the connection between the capacitor and the second inductor of the plurality of inductors is conductive, the connection between the capacitor and the other inductors is disconnected, and the second resonant circuit formed by the capacitor and the second inductor is in the conductive state. When the switch is in an N-th conducting state, the connection between the capacitor and an N-th inductor in the plurality of inductors is conducted, the connection between the capacitor and other inductors is disconnected, and an N-th resonant circuit formed by the capacitor and the N-th inductor is in a conducting state.

In some examples, the switch may include a control terminal, an input terminal, and a plurality of output terminals. Wherein the control terminal is connected with a device for controlling the on state of the switch. The input end of the switch is connected with the capacitor, and each output end of the switch is connected with an inductor. For example, in the case where the power management module controls the switch through the control port, the control port of the power management module is connected to the control terminal of the switch. In addition, the output end of the power management module for outputting alternating current is connected with the input end of the switch through a capacitor, and each output end of the switch is connected with the input end of the power management module through an inductor respectively. Wherein the number of switch outputs is the same as the number of inductors.

In other examples, the wireless charging circuit may further include a switch control module for controlling the switch, where the switch control module may control the switch to turn on the resonant circuit corresponding to the charging area where the powered device is in place when the powered device is in place in the charging area corresponding to the resonant circuit. And, at this time, the power management module may output an alternating current having an operating frequency matched to a resonance frequency of the resonance circuit. For example, in case the switch is provided with a control terminal, the switch control module may be connected to the control terminal of the switch to enable control of the switch.

In some embodiments, the wireless charging circuit may further include a powered device detection module, which may detect whether a powered device is in place in a charging area corresponding to each resonant circuit. The power receiving device detection module is connected with the power management module, and can send the detection result of whether the power receiving device is in place in the charging area corresponding to each resonant circuit to the power management module, so that the power management module can control the resonant circuit to be in a conducting state according to the detection result of whether the power receiving device is in place in the charging area corresponding to each resonant circuit.

When the inductance value of the first inductor L1 is different from the inductance value of the second inductor L2, the resonance frequency of the resonance circuit composed of the first inductor L1 and the capacitor C is also different from the resonance frequency of the resonance circuit composed of the second inductor L2 and the capacitor C as shown in fig. 4. However, because the power management module can output alternating current with different working frequencies, when the tablet personal computer charges the handwriting pen, the power management module can output alternating current with the working frequency similar to the resonant frequency of the resonant circuit formed by the first inductor L1 and the capacitor C; under the condition that the tablet personal computer charges the wireless keyboard, the power management module can output alternating current with the working frequency similar to the resonant frequency of a resonant circuit formed by the second inductor L2 and the capacitor C. Thus, the capacitor can be shared by two different resonant circuits in the wireless charging circuit, so that the manufacturing cost of the wireless charging circuit can be reduced.

The following describes a wireless charging method according to an embodiment of the present application with reference to fig. 5.

Fig. 5 is a flow chart of a wireless charging method according to an embodiment of the present application, where the method is performed by a wireless charging device, and includes the following steps:

s501, detecting the presence condition of the powered devices in all charging areas.

The wireless charging device can detect the presence condition of the powered device in the charging area in a wireless induction mode. The detection of the powered device may be achieved by a powered device detection module as in fig. 2, and by a sensor module 180 as in fig. 3.

S502, determining the resonance frequency of a resonance circuit corresponding to a target charging area where the current powered device is in place.

In some embodiments, the resonant frequency of the resonant circuit corresponding to each charging area is pre-stored in the wireless charging device, and then the wireless charging device may directly learn, by means of query, the resonant frequency of the resonant circuit corresponding to the target charging area.

It is understood that in the case where the wireless charging device has been manufactured, the charging areas of the wireless charging device have been determined, and the hardware structure of the resonant circuit corresponding to each charging area has also been determined, as is known from the resonant frequency calculation formula, the resonant frequency of the resonant circuit corresponding to the target charging area has also been determined. Therefore, the wireless charging device can learn the resonant frequency of the resonant circuit corresponding to each charging area before leaving the factory, and store the resonant frequency in the built-in memory.

S503, outputting alternating current with the working frequency matched with the resonant frequency to the resonant circuit corresponding to the target charging area.

The alternating current with the working frequency matched with the resonant frequency refers to alternating current with the difference between the working frequency and the resonant frequency being greater than zero and less than a preset threshold.

The preset threshold may be determined empirically based on the application. For example, a developer through a lot of tests finds that, in the case that the difference between the working frequency and the resonant frequency is greater than zero and less than 10KHz, the wireless charging efficiency can be kept at a high level, and then the preset threshold is 10KHz.

In some examples, the wireless charging device may also update the preset threshold that has been set based on the latest update data issued by the developer. For example, when the tablet computer is shipped for the first time, the stored preset threshold is 10KHz. And then, after the latest released update data is downloaded and installed in the tablet personal computer, the updated preset threshold value in the tablet personal computer is 5KHz.

In some embodiments, the wireless charging device may calculate an operating frequency range of the ac current that should be output according to a preset threshold value and a resonance frequency when performing S503, and then control the operating frequency of the output ac current based on the calculated operating frequency. For example, the working frequency of the alternating current which should be output is 103KHz-105KHz calculated by the tablet personal computer according to the preset threshold value and the resonant frequency, and then the tablet personal computer can know that the working frequency of the alternating current is kept within 103KHz-105KHz when the alternating current is output.

In other embodiments, where the wireless charging device may output ac currents at a plurality of different determined operating frequencies, the wireless charging device may select an appropriate operating frequency from the plurality of operating frequencies according to the resonant frequency of the resonant circuit corresponding to the target charging region, and output the ac current. For example, the wireless charging device may output an alternating current of 50KHz, 80KHz, 100 KHz. If the resonant frequency of the resonant circuit corresponding to the target charging area is 55KHz, and the difference between 55KHz and 50KHz is minimal, the wireless charging device may determine 50KHz as the appropriate operating frequency and output an ac current having an operating frequency of 50 KHz.

The wireless charging device can output different working frequencies in a switching mode. For example, as in the example above, the wireless charging device determines that the resonant frequency of the resonant circuit corresponding to the target charging area is 55 KHz and selects 50KHz as the appropriate operating frequency, then the wireless charging device may instruct the power management module for outputting the alternating current to switch the output to the output port of 50 KHz. In some examples, the power management module may obtain an instruction to switch the operating frequency through the IO port.

In some embodiments, since the wireless charging method can output an ac current with a working frequency matching the resonant frequency, so that the resonant circuit starts to oscillate, the resonant frequency of the resonant circuit in the wireless charging device can be determined according to actual requirements, and the magnitude of the resonant frequency does not need to be determined according to the working frequency of the ac current.

Further, since the resonant frequency of the resonant circuit is determined by the inductance value of the inductor and the capacitance value of the capacitor, the inductance value of the inductor and the capacitance value of the capacitor can be determined according to actual requirements, so that the inductor and the capacitor of the resonant circuit in the wireless charging device can be set according to the actual requirements, and the charging efficiency of each resonant circuit is ensured to be at a higher level, and the inductor and the capacitor of the resonant circuit for forming are not required to be selected according to the determined resonant frequency.

In some examples, where each resonant circuit of the tablet computer includes a capacitor and an inductor, respectively, the resonant frequencies of each resonant circuit may be different or dissimilar, as the power management module may output ac currents at multiple operating frequencies. By non-close is meant that the difference between the resonant frequencies of the two resonant circuits may be greater than a preset threshold.

For example, the inductance value of the inductor in the resonant circuit corresponding to the stylus pen is 20Uh, and the inductance value of the inductor in the resonant circuit corresponding to the wireless keyboard is 10Uh. Then, the capacitance value of the capacitor in the resonant circuit corresponding to the stylus pen and the capacitance value of the capacitor in the resonant circuit corresponding to the wireless keyboard can be set at will.

Still further, the inductors in each resonant circuit in the wireless charging device may also share the same capacitor. As shown in fig. 4, the details can be found in the above description, and will not be repeated here.

Therefore, by the wireless charging method provided by the embodiment of the application, the structural design of the wireless charging circuit is more flexible, and the manufacturing cost is convenient to reduce. In addition, by the wireless charging method provided by the embodiment of the application, the volume of the wireless charging equipment can be smaller.

In the above-described embodiment, after the wireless charging apparatus performs S501, there may be the following two cases.

In one case of the above embodiment, there may be a case where the wireless charging device determines that only one charging area currently has the powered device in place. In this case, the wireless charging apparatus may directly take a charging area in which the power receiving apparatus is present as a target charging area, and execute S502 and S503 described above.

In some examples, the tablet may charge the stylus and the wireless keyboard, and the tablet detects that the stylus is adsorbed in a corresponding charging area and the wireless keyboard is not adsorbed in a corresponding area. The tablet computer can take the charging area where the handwriting pen is located as a target charging area, determine the resonant frequency of the resonant circuit corresponding to the target charging area where the handwriting pen is located, and then output alternating current with the working frequency matched with the resonant frequency. For example, if the resonant frequency of the resonant circuit corresponding to the target charging area where the stylus is located is 88KHz, the tablet computer may output an ac current with a working frequency of 90 KHz.

Similarly, the wireless keyboard is detected to be adsorbed in the corresponding charging area on the tablet computer, and the handwriting pen is not adsorbed in the corresponding area. The tablet personal computer can take the charging area where the wireless keyboard is located as a target charging area, determine the resonant frequency of the resonant circuit corresponding to the target charging area where the wireless keyboard is located, and then output alternating current with the working frequency matched with the resonant frequency. For example, if the resonant frequency of the resonant circuit corresponding to the target charging area of the wireless keyboard is 110KHz, the tablet computer may output an ac current with a working frequency of 108 KHz.

In one case of the above embodiment, the wireless charging apparatus may have a case where it is determined that there are a plurality of charging areas in which the powered apparatus is currently in place, respectively. In this case, the wireless charging apparatus may determine one target charging area from among the plurality of charging areas in which the power receiving apparatus is present according to a preset rule, and then execute S502 and S503 described above.

Wherein, the preset rule includes, but is not limited to, any one of the following: time division multiplexing rules, power-based rules, etc.

In the following, taking a scenario that the tablet computer can charge the handwriting pen and the wireless keyboard, and the tablet computer detects that the handwriting pen and the wireless keyboard are charged and are adsorbed in the charging area, the wireless charging equipment is introduced to determine a specific implementation of a target charging area from a plurality of charging areas with power receiving equipment in place according to a preset rule.

In some embodiments, the tablet computer may determine the target charging area by using a time division multiplexing rule, that is, the tablet computer may sequentially determine, according to a preset time interval, each charging area in the charging areas corresponding to the stylus and the wireless keyboard as the target charging area. For example, the tablet computer may select a charging area corresponding to the stylus pen as the target charging area in the first time period, select a charging area corresponding to the wireless keyboard as the target charging area in the second time period, and then alternately select the charging areas corresponding to the stylus pen and the wireless keyboard as the target charging areas in each subsequent time period.

In other embodiments, the tablet may determine the target charging area using a power-based rule. For example, the tablet computer may determine a charging area corresponding to the powered device having the smallest remaining power as the target charging area. For example, the tablet computer may obtain the current power of the stylus and the current power of the wireless keyboard. Under the condition that the current electric quantity of the handwriting pen is lower than that of the wireless keyboard, the tablet computer selects a charging area corresponding to the handwriting pen as a target charging area; and under the condition that the current electric quantity of the wireless keyboard is lower than that of the handwriting pen, the tablet computer selects a charging area corresponding to the wireless keyboard as a target charging area.

In some cases, in a case where the number of powered devices having the smallest remaining power is at least two, the wireless charging device may select, from the powered devices having the smallest remaining power, a charging area corresponding to one powered device as the target charging area. Or the wireless charging device may select, from among the power receiving devices having the smallest remaining power, a charging area corresponding to the power receiving device having a higher charging priority as the target charging area. The charging priority may be preset, or may be set by the user according to the requirement of the user. For example, the developer finds that the duration of using the stylus by the user is long according to the use requirement survey situation of the user, and therefore, the charging priority of the stylus can be set higher than the charging priority of the wireless keyboard. For another example, the user may select an option to charge the wireless keyboard preferentially in the wireless charging device interface displayed on the tablet computer, where the charging priority of the wireless keyboard is set to be higher than the charging priority of the stylus.

In the above embodiment, after determining a target charging area from a plurality of charging areas, the wireless charging device may control a resonant circuit corresponding to the target charging area to be in a conductive state. The processor 110 of the electronic device as shown in fig. 3 comprises a control port connected to the switch for outputting a control signal controlling the on-state of the switch.

In some embodiments, as shown in fig. 4, when the tablet computer determines that the wireless keyboard is the target charging area, the tablet computer may enable the endpoint 1 and the endpoint 3 of the single pole double throw switch K to be turned on, so that the resonant circuit corresponding to the wireless keyboard is in a conductive state. Wherein the control connection between the tablet pc and the single pole double throw switch K is not shown.

Through the scheme, the wireless charging equipment can be flexibly designed according to actual requirements. In addition, the inductor in each resonant circuit in the wireless charging device can share the same capacitor, so that the manufacturing cost of the wireless charging device can be reduced. Further, since the wireless charging device performing the wireless charging method has low requirements on hardware, the accommodating space required to be provided for the hardware in the resonant circuit in the wireless charging device can be further reduced, so that the volume of the wireless charging device can be further reduced.

Embodiments of the present application also provide a computer-readable storage medium comprising computer instructions that, when executed on a wireless charging device as described above, cause the wireless charging device to perform the functions or steps of the method embodiments described above.

Embodiments of the present application also provide a computer program product comprising a computer program for causing a wireless charging device to perform the functions or steps of the method embodiments described above when the computer program is run on an electronic device.

It will be apparent to those skilled in the art from this description that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A wireless charging circuit, comprising a power management module, a switch, a capacitor, and a plurality of inductors;

The capacitor is coupled with the plurality of inductors through the switch, and the capacitor and each inductor in the plurality of inductors respectively form a plurality of resonant circuits; the switch is used for conducting connection between the capacitor and one of the plurality of inductors;

The power management module is connected with each resonant circuit and is used for outputting alternating current with working frequency matched with the resonant frequency of the target resonant circuit; the connection between the capacitor and the inductor in the target resonant circuit is conductive.

2. The wireless charging circuit of claim 1, wherein the inductance values of at least two of the plurality of inductors are different.

3. The wireless charging circuit of claim 1 or 2, wherein at least two of the plurality of resonant circuits have different resonant frequencies.

4. The wireless charging circuit of claim 1 or 2, wherein the power management module comprises a control port connected to the switch for outputting a control signal controlling the on state of the switch.

5. A wireless charging device comprising the wireless charging circuit of any one of claims 1-4, a plurality of charging areas, and a powered device detection module;

The power receiving equipment detection module is connected with the power management module in the wireless charging circuit and is used for detecting the in-place condition of the power receiving equipment in the charging areas;

The power management module is used for determining a target resonant circuit corresponding to the target charging area according to the in-place condition and outputting alternating current with the working frequency matched with the resonant frequency of the target resonant circuit; the target charging area is a charging area where the powered device is in place;

the target resonant circuit is configured to generate oscillation based on the alternating current to power a powered device.

6. The wireless charging device of claim 5, further comprising a processor including a control port connected to the switch for outputting a control signal controlling the on state of the switch.

7. A wireless charging method, characterized by being applied to a wireless charging apparatus including a plurality of charging areas that can charge a plurality of power receiving apparatuses, each of the charging areas being provided with a resonance circuit;

the wireless charging method comprises the following steps:

Determining a resonant frequency of a resonant circuit of a target charging zone in response to a powered device being in place in the target charging zone;

and outputting alternating current with the working frequency matched with the resonant frequency to the resonant circuit of the target charging area.

8. The method of claim 7, wherein the method further comprises:

detecting the presence of a powered device in the plurality of charging areas;

A target charging zone is determined from the plurality of charging zones based on the in-situ condition.

9. The method of claim 8, wherein the determining a target charging region from the plurality of charging regions based on the in-situ conditions comprises:

Determining one charging area as a target charging area when one charging area exists and a power receiving device exists in the plurality of charging areas;

and when the plurality of charging areas exist and the power receiving equipment is in place, determining a target charging area from the plurality of charging areas according to a preset rule.

10. The method of claim 9, wherein the preset rules include, but are not limited to:

sequentially determining each charging area in the plurality of charging areas as a target charging area according to a preset time interval;

or determining a charging area corresponding to the powered device with the least residual electric quantity as a target charging area.

11. A wireless charging device, the wireless charging device comprising a memory and one or more processors; the memory is coupled to the processor; the memory is used for storing computer program codes, and the computer program codes comprise computer instructions; the computer instructions, when executed by the processor, cause the wireless charging device to perform the method of any one of claims 7-10.

12. A computer readable storage medium comprising computer instructions which, when run on a wireless charging device, cause the wireless charging device to perform the method of any one of claims 7-10.

13. A computer program product comprising computer program/instructions which, when executed by a processor, cause the wireless charging device to perform the method of any one of claims 7-10.