A wireless charging method and system, and a computer-readable storage medium

Abstract

The embodiment of the present invention provides a wireless charging method and system thereof, and a computer-readable storage medium, which detects whether a second device to be charged is within the wireless charging range of a charging device. If so, a wireless charging communication connection is established between the two, and a transmitting coil that meets the charging parameters of the second device to be charged is selected from the charging device to perform wireless charging for the second device to be charged, thereby achieving independent control of the operation of each transmitting coil in one charging device, thereby achieving wireless charging function of multiple devices to be charged at the same time by one charging device, reducing the cost of products with wireless charging function, improving user experience, and having high safety.

Description

Technical Field

[0001] The embodiments of the present invention relate to, but are not limited to, the field of wireless charging technology, and specifically, relate to, but are not limited to, a wireless charging method and system, and a computer-readable storage medium. Background Art

[0002] With the continuous development of terminal technology, especially in the direction of power supply, the current standard for realizing fast and convenient charging technology is mainly the Qi standard of WPC (Wireless Power Consortium). This standard adopts electromagnetic induction method to transmit power from the transmitting coil to the receiving coil in a contactless manner.

[0003] In the current charging method, when the terminal is wirelessly charging, in the implementation based on the Qi standard, the electromagnetic induction method needs to align the transmitting end coil and the receiving end coil to achieve the highest transmission efficiency, so it only supports one transmitting end and one receiving end to work at the same time. Therefore, in order to make the receiving end and the transmitting end at the best efficiency coil. In the design of the related art, multiple coils are designed on the transmitting end to solve the problem, but when the charging circuit of this structure is wirelessly charged, only two coils aligned with the transmitting end coil and the receiving end coil are finally selected for power transmission. Since the standard only supports 1 to 1 simultaneous operation, even if there are multiple transmitting coils, they cannot be fully utilized, and the design of multiple transmitting coils is only to facilitate the determination of the more efficient transmitting coils. Therefore, it is still impossible to realize the problem of a single transmitting end charging multiple receiving ends at the same time or multiple transmitting coils charging multiple receiving ends at the same time. In particular, as there are more terminals, when such a charging circuit is compatible with multiple receiving ends, its effective charging time will be reduced, and it is more difficult to monitor the charging process in real time during the entire wireless charging process. Summary of the invention

[0004] The embodiments of the present invention provide a wireless charging method, a terminal, and a computer-readable storage medium, which mainly solve the technical problem that in the current wireless charging method, one wireless charger cannot charge multiple terminals at the same time.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a wireless charging method, which includes:

[0006] Detecting whether the second device to be charged is within the wireless charging range of the charging device; the charging device includes at least one transmitting coil with independent working capability;

[0007] If the second device to be charged is within the wireless charging range, establishing a wireless charging communication link between the second device to be charged and the charging device;

[0008] Selecting a transmitting coil in the charging device that meets the charging parameters of the second device to be charged, and setting a device state of the second device to be charged, wherein the device state includes a master device state and a slave device state;

[0009] The second device to be charged is charged by controlling the transmitting coil through the established wireless charging communication link and the device status.

[0010] To solve the above technical problems, an embodiment of the present invention further provides a wireless charging system, comprising: at least one second device to be charged and a charging device for providing power supply to the second device to be charged, wherein the charging device comprises at least one transmitting coil capable of working independently;

[0011] The charging device detects whether the second device to be charged is within the wireless charging range of the charging device;

[0012] If the second device to be charged is within the wireless charging range, the charging device establishes a wireless charging communication link between the second device to be charged and the charging device;

[0013] The charging device selects a transmitting coil that meets the charging parameters of the second device to be charged, and sets a device state of the second device to be charged, wherein the device state includes a master device state and a slave device state;

[0014] The charging device controls the transmitting coil to charge the second device to be charged through the established wireless charging communication link.

[0015] To solve the above technical problems, an embodiment of the present invention further provides a wireless charging system, including a processor, a memory and a communication bus;

[0016] The communication bus is used to realize the communication connection between the processor and the memory;

[0017] The processor is used to execute one or more programs stored in the memory to implement the steps of the wireless charging method as described above.

[0018] To solve the above technical problems, an embodiment of the present invention further provides a computer-readable storage medium, which stores one or more computer programs. The one or more computer programs can be executed by one or more processors to implement the steps of the wireless charging method as described above.

[0019] The beneficial effects of the present invention are:

[0020] According to the wireless charging method and system thereof, and computer-readable storage medium provided by the embodiments of the present invention, by detecting whether the second device to be charged is within the wireless charging range of the charging device, if so, a wireless charging communication connection is established between the two, and a transmitting coil that meets the charging parameters of the second device to be charged is selected from the charging device to perform wireless charging for the second device to be charged, thereby achieving independent control of the operation of each transmitting coil in one charging device, thereby achieving wireless charging function for multiple devices to be charged at the same time, reducing the cost of products with wireless charging function, improving user experience, and having higher safety.

[0021] Other features and corresponding beneficial effects of the present invention are described in the latter part of the specification, and it should be understood that at least part of the beneficial effects become obvious from the description in the specification of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a wireless charging method according to an embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram of a wireless charging system according to an embodiment of the present invention;

[0024] Figure 3 Another structural schematic diagram of a wireless charging system according to an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of a process of wirelessly charging a single receiving end by a transmitting end according to an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of a process of wirelessly charging multiple receiving ends by a transmitting end according to an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of a process of a master device accessing a slave device according to an embodiment of the present invention;

[0028] Figure 7 This is a flowchart of a receiving end entering wireless charging according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of a process of a receiving end exiting wireless charging according to an embodiment of the present invention;

[0030] Fig. 9 A schematic diagram of a process of temperature monitoring at a transmitting end according to an embodiment of the present invention;

[0031] Fig.10 A schematic diagram of a process of temperature monitoring at a receiving end according to an embodiment of the present invention;

[0032] Fig.11It is a schematic diagram of the working process of the master device when the slave device stops according to the embodiment of the present invention;

[0033] Fig.12 A schematic diagram of a process flow of interrupting the operation of a slave device according to an embodiment of the present invention;

[0034] Fig.13 FIG. 4 is another structural schematic diagram of a wireless charging system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following is a further detailed description of the embodiments of the present invention through specific implementation methods combined with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] Embodiment 1:

[0037] At present, in order to solve the defect that it is difficult to determine the position between the receiving end (i.e. the device to be charged) and the sending end (i.e. the charging device), the WPC organization and many manufacturers have adopted the method of setting multiple wireless charging coils (i.e. transmitting coils) or multiple sets of charging control circuits on the sending end to achieve this. Since the sending end has more stacked coils or charging control circuits, the receiving end can place them in a more flexible way. When the receiving end enters the effective charging range of the sending end, the sending end selects the coil aligned with the receiving end coil for power transmission, that is, the coil with the highest efficiency in the wireless charging process. The control circuit of the sending end polls each sending coil to determine which sending coil has the highest transmission efficiency between the receiving end coils, so as to select the sending coil and the receiving end for wireless charging. The method of multiple coils on the sending end is only a more convenient way to realize the alignment of the sending and receiving end coils. After entering the charging process, there is only one coil on the sending end side to participate in the charging. Even if another receiving end is placed at this time, the sending end will not respond to the wireless charging needs of the new receiving end, so that the use scope of the wireless charging device is too limited to one-to-one use. In response to such charging restrictions, the present invention adds a power management unit to each transmitting coil on the charging device, and the power management unit in the charging device performs charging control and detection control on the device to be charged, thereby selecting the corresponding transmitting coil to provide power for the device to be charged; at the same time, in order to realize the real-time monitoring of the charging process of the device to be charged by the charging device, a wireless communication module is also set on the receiving end, and the charging information between the receiving ends is realized through the wireless communication module, and then one of the receiving ends feeds back to the transmitting end. Based on the above hardware, the embodiment of the present invention provides a one-to-many wireless charging method for charging devices to solve the above problems.

[0038] In an embodiment of the present invention, for realizing a one-to-many wireless charging method, it can be realized that one coil corresponds to charging of multiple devices, or it can be realized that multiple coils correspond to charging of multiple devices, and the many-to-many process is to select one that is closer to the device as the main charging coil of the device.

[0039] The wireless charging method provided in this embodiment is shown in Figure 1 As shown, the specific control steps of the method include:

[0040] S101: Detect whether the second device to be charged is within the wireless charging range of the charging device.

[0041] Among them, the second device to be charged is a device with the function of wirelessly communicating with other devices to be charged, and the charging device includes at least one management unit and at least one transmitting coil with independent working capability, and the management unit is used to control the independent charging operation of the transmitting coil, and the management unit specifically includes a power management unit and a charging management unit.

[0042] Furthermore, this step can be implemented in the following ways:

[0043] Detect whether the magnetic flux of each transmitting coil changes;

[0044] If the magnetic flux changes, it is determined that the second device to be charged has entered the wireless charging range of the charging device;

[0045] If the magnetic flux does not change, the second device to be charged is not within the wireless charging range of the charging device.

[0046] In actual applications, the transmitting coil will send a normal low-power signal to the outside, and when the second device to be charged enters the wireless charging range of the transmitting coil of the charging device, it will sense the magnetic field corresponding to the normal low-power signal sent by the transmitting coil. At this time, the magnetic flux of the transmitting coil will be reduced. At this time, it is considered that the second device to be charged is within the wireless charging range. The normal low-power signal is sent in such a way that the transmitting coil is always in the process of sending a low-power signal or sending it at short intervals.

[0047] In other embodiments, whether the second device to be charged is within the wireless charging range may be determined by detecting a sudden change in voltage or power. Of course, the detection method is not limited to the above method, and other methods may be used.

[0048] S102: If the detection result of step S101 is yes, a wireless charging communication link is established between the second device to be charged and the charging apparatus, and the device state of the second device to be charged is set.

[0049] In this step, the device status includes a master device status and a slave device status. In actual applications, when the second device to be charged is the first device to be charged within the wireless charging range of the charging device, the device status of the second device to be charged is set to the master device status. If not, it is set to the slave device. Of course, it is also possible to make appropriate adjustments and settings according to the actual situation.

[0050] In this step, the wireless charging communication link specifically includes a wireless charging connection and a communication connection, and the wireless charging connection is a link for realizing charging of the second device to be charged, and the communication connection is a link for realizing information interaction between the charging device and the second device to be charged.

[0051] S103: Selecting a transmitting coil in the charging device that meets the charging parameters of the second device to be charged.

[0052] S104: Controlling the transmitting coil to charge the second device to be charged through the established wireless charging communication link.

[0053] Specifically, when charging the second device to be charged, it is specifically achieved through a wireless charging connection in a wireless charging communication link.

[0054] In this embodiment, if the device state of the second device to be charged is set to a slave device state, after the step of selecting a transmitting coil in the charging device that meets the charging parameters of the second device to be charged, the method further includes:

[0055] Query whether there is a first device to be charged whose device status is a main device within the wireless charging range;

[0056] If the first device to be charged exists, a wireless communication connection is established between the second device to be charged and the first device to be charged; the second device to be charged reports its own charging parameters to the charging device through the first device to be charged;

[0057] If the first device to be charged does not exist, a wireless charging communication link is established between the second device to be charged and the charging apparatus, and the state of the second device to be charged is switched from the slave device state to the master device state.

[0058] In this embodiment, after the charging parameters of the second device to be charged are reported to the charging apparatus through the first device to be charged, the method further includes:

[0059] Determine whether the identity authentication information of the second device to be charged exists in the management unit;

[0060] If so, the wireless charging communication link between the charging device and the first device to be charged will be disconnected, and the wireless charging communication link between the charging device and the second device to be charged will be established.

[0061] If it does not exist, it will be marked as a foreign object and the detection of the next device to be charged will be continued. After all the devices to be charged that have passed the identity authentication information are charged, the charging detection of the foreign object will be returned to continue.

[0062] In another embodiment, after step S104, the method further includes:

[0063] Acquiring performance parameters of the second device to be charged through the wireless charging communication link;

[0064] Determining whether the second device to be charged supports multi-device charging according to the performance parameter;

[0065] If supported, query whether there is a first device to be charged whose device status is a master device within the wireless charging range;

[0066] The charging of the second device to be charged is controlled according to the query result.

[0067] If it is not supported, maintain the wireless charging connection of the second device to be charged and only charge it; or disconnect the wireless charging connection of the second device to be charged, and set its charging priority to the lowest priority, wait for the charging device to complete charging the device to be charged that supports multi-device charging, and then start charging the device that does not support multi-device charging.

[0068] In actual applications, determining whether the second device to be charged supports multi-device charging according to the performance parameters can be specifically implemented in setting step S102, that is, while establishing the wireless charging communication link, it also includes determining whether the device to be charged has the function of supporting multi-device charging. If so, when another device to be charged enters the wireless charging range, if the device to be charged also has the function of supporting multi-device charging, information interaction can be achieved by establishing a wireless connection link between the devices to be charged, and only one device to be charged needs to be communicated with the charging device. This can also reduce the communication power consumption of the charging device.

[0069] In this embodiment, controlling the charging of the second device to be charged according to the query result includes:

[0070] If the first device to be charged exists within the wireless charging range, a wireless communication connection is established between the second device to be charged and the first device to be charged; the second device to be charged reports its real-time charging data to the charging device through the first device to be charged;

[0071] If the first device to be charged does not exist within the wireless charging range, the second device to be charged is set to a master device state.

[0072] In this embodiment, in order to improve the safety performance of the wireless charging process, after step S101 and before step S102, the following is further included:

[0073] Determining whether the second device to be charged is a foreign object;

[0074] If so, determine the transmitting coil corresponding to the location of the foreign object, and control the transmitting coil to continuously send a low-power signal of the foreign object. The low-power signal can be sent in a short time or at a longer interval to mark the foreign object.

[0075] After the foreign object is removed from the charging device, the normal low-power signal transmission is resumed to detect the entry of the next device to be charged.

[0076] In this embodiment, the step of controlling the transmitting coil to charge the second device to be charged through the established wireless charging communication link specifically includes:

[0077] adjusting the transmission power of the transmitting coil according to the charging parameters of the second device to be charged, and evaluating the transmission efficiency of charging;

[0078] The final transmission power of the transmitting coil for charging the device to be charged is determined according to the evaluation result.

[0079] In some other embodiments, after the step of controlling the transmitting coil to charge the second device to be charged through the established wireless charging communication link, the method further includes:

[0080] Detecting whether all devices to be charged within the wireless charging range of the charging device need charging adjustment;

[0081] A corresponding charging adjustment strategy is determined according to the detection result, and charging adjustment control is performed on the device to be charged.

[0082] The detecting whether all the devices to be charged within the wireless charging range of the charging device need to be charged or not includes one of the following methods:

[0083] Method 1: Detect the temperature value generated between the charging device and each device to be charged; determine whether the temperature value is greater than a preset temperature value; if so, reduce the transmission power of the transmitting coil or disconnect the transmitting coil to charge the device to be charged, and restore the transmitting coil to normal low-power signal transmission. This method can be implemented from the charging device side or from the device to be charged side.

[0084] Method 2: Determine whether the device to be charged meets the conditions for disconnecting charging, the conditions including receiving a request to disconnect charging and / or the charging transmission efficiency is less than a preset value; if met, disconnect the transmitting coil to charge the device to be charged, and restore the transmitting coil to normal low-power signal transmission.

[0085] In this embodiment, if the state of the device to be charged that is disconnected from charging is a master device state, after disconnecting the transmitting coil to charge the device to be charged, it also includes: selecting a device to be charged from the remaining devices to be charged in the charging device, adjusting its device state to the master device state, and establishing a wireless charging communication link between the adjusted master device and the charging device.

[0086] The wireless charging method provided in this embodiment detects whether the second device to be charged is within the wireless charging range of the charging device. If so, a wireless charging communication connection is established between the two, and a transmitting coil that meets the charging parameters of the second device to be charged is selected from the charging device to perform wireless charging for the second device to be charged, thereby realizing that one charging device can separately control the operation of each transmitting coil, thereby realizing that one charging device can wirelessly charge multiple devices to be charged at the same time, reducing the cost of products with wireless charging functions, improving user experience, and having higher safety.

[0087] At the same time, through the wireless communication connection established between the devices to be charged, the real-time charging information of all devices to be charged is gathered on the device to be charged as the master device and sent to the charging device. The charging device monitors and controls the charging of each device to be charged in real time based on the information, further realizing one-to-many wireless charging of the charging device and improving charging safety and compatibility.

[0088] Embodiment 2:

[0089] Figure 2 A schematic diagram of the structure of a wireless charging system provided in an embodiment of the present invention, the system comprising: at least one second device to be charged 21 and a charging device 22 for providing power supply to the second device to be charged 21, the charging device 22 comprising at least one transmitting coil 221 having the ability to work independently, wherein:

[0090] The charging device 22 detects whether the second device to be charged 21 is located within the wireless charging range of the charging device 22;

[0091] If the second device to be charged 21 is within the wireless charging range, the charging device 22 establishes a wireless charging communication link between the second device to be charged 21 and the charging device 22, and sets the device state of the second device to be charged 21, wherein the device state includes a master device state and a slave device state;

[0092] The charging device 22 selects a transmitting coil that meets the charging parameters of the second device to be charged 21;

[0093] The charging device 22 controls the transmitting coil 221 to charge the second device to be charged 21 through the established wireless charging communication link.

[0094] In this embodiment, the system also includes a first device to be charged 23, where the first device to be charged 23 and the second device to be charged 22 can be the same terminal or different terminals, but both are terminals with wireless communication functions. When the two are close to a certain distance, they can establish a wireless communication connection and realize mutual information exchange.

[0095] In this embodiment, when the charging device 22 sets the device state of the second device to be charged 21 to the slave device state, the second device to be charged 21 is further used to query whether there is a first device to be charged 23 in the master device state within the wireless charging range; if so, establish a wireless communication connection between the second device to be charged 21 and the first device to be charged 23; and report its own charging parameters to the charging device 22 through the first device to be charged 23;

[0096] If not, a wireless charging communication link is established between the second device to be charged 21 and the charging apparatus 22, and the state of the second device to be charged 21 is switched from the slave device state to the master device state.

[0097] In this embodiment, after the charging parameters of the second device to be charged 21 are reported to the charging apparatus 22 through the first device to be charged 23, the method further includes:

[0098] The charging device 22 determines whether there is identity authentication information of the second device to be charged 21;

[0099] If so, the wireless charging communication link between the charging device 22 and the first device to be charged 23 will be disconnected, and the wireless charging communication link between the charging device 22 and the second device to be charged 21 will be established.

[0100] If it does not exist, it will be marked as a foreign object and the detection of the next device to be charged will be continued. After all the devices to be charged that have passed the identity authentication information are charged, the charging detection of the foreign object will be returned to continue.

[0101] In this embodiment, the charging device 22 is also used to obtain the performance parameters of the second device to be charged 21 through the wireless charging communication link; determine whether the second device to be charged 21 supports multi-device charging based on the performance parameters; if supported, query whether there is a first device to be charged 23 whose status is a master device within the wireless charging range; and control the charging of the second device to be charged 21 based on the query result.

[0102] In this embodiment, the charging device 22 is used to establish a wireless communication connection between the second device to be charged 21 and the first device to be charged 23 when the first device to be charged 23 is within the wireless charging range; the second device to be charged 21 reports its real-time charging data to the charging device 22 through the first device to be charged 23; when the first device to be charged 23 is not within the wireless charging range, the second device to be charged 21 is set to the master device state.

[0103] like Figure 3 As shown, it is a structural diagram of another wireless charging system provided in this embodiment. The second device to be charged 21 and the first device to be charged 23 in the system have the same structure, specifically including a receiving coil 211, a wireless charging receiving control circuit 212, a first charging management unit 213 and a wireless communication unit 214; the charging device 22 includes at least one transmitting coil 221, a power conversion circuit 222, a wireless charging transmitting control circuit 223, and a power management unit 225 corresponding to the second charging management unit 224.

[0104] The power conversion circuit 222 of the charging device 22 converts the external input power into the power supply required in the wireless charging process; the wireless charging transmission control circuit 223 is used to communicate with the wireless charging communication link, encode and decode the information in the communication process, and detect foreign objects; the second charging management unit 224 is used to manage the transmission power management of each transmitting coil 221 and the information management of the adapted device to be charged (that is, the second device to be charged 21 and / or the first device to be charged 23); the transmitting coil 221 is used to convert the alternating power into a changing magnetic field; the power management unit 225 provides the alternating power required by the transmitting coil 221 and detects the receiving coil 211. The power management unit 225 detects that an object has entered the charging range of the transmitting coil 221 and notifies the second charging management unit 224. The second charging management unit 224 controls the wireless charging transmission control circuit 223 to perform relevant foreign object detection and information interaction according to the current state, and informs the device to be charged that the wireless charging environment supports the multi-receiving end wireless charging function according to the interactive information; according to the result of the interaction, it is used to manage the corresponding transmitting coil 221 or the wireless charging of multiple devices to be charged; when the transmitting coil 221 of the charging device 22 is charged, the transmitting coil 221 is restored to the default state. The wireless charging transmission control circuit 223 can be a control device similar to the WPC specification; the second charging management unit 224 can be implemented by a functional circuit with a microprocessor, and the power management unit 225 can be implemented by a DC to AC inverter circuit and output power monitoring, which can realize an AC power supply of a certain frequency and monitor its voltage value and the temperature monitoring of the transmitting coil 221; the transmitting coil 221 can be a coil wound by copper wire or printed on a flexible circuit board, reaching a certain inductance value at a certain frequency.

[0105] The receiving coil 211 of the device to be charged (i.e., the second device to be charged 21 and / or the first device to be charged 23) converts the induced changing magnetic field into an alternating power source; the wireless charging receiving control circuit 212 converts the alternating power source into a direct current power source, wireless charging communication link communication and information encoding and decoding of the communication process; the first charging management unit 213 manages the power information of the charging process and controls the master and slave device roles of the wireless communication; the wireless communication unit 214 is used to transmit information. After the receiving coil 211 senses the electric energy, the first charging management unit 213 searches for the master device by controlling the wireless communication unit 214 to find out whether it is in an environment that supports wireless charging of multiple devices to be charged, or after interacting with the charging device 22, places the wireless communication function in the master device to indicate that the wireless charging environment supports wireless charging of multiple devices to be charged. The wireless charging receiving control circuit 212 can be a control device similar to the WPC specification, and also includes a conversion circuit for converting AC power into DC power; the receiving coil 211 can be a coil wound with copper wire or printed on a flexible circuit board, which reaches a certain inductance value at a certain frequency, and the inductance value can achieve optimal induction for the changing magnetic field generated by the transmitting coil; the first charging management unit 213 can be implemented by a microprocessor and a voltage and current detection circuit and a temperature monitoring circuit of the receiving coil 211 environment; the wireless communication unit 214 can be implemented by infrared, Bluetooth, near field communication NFC, WIFI or Zigbee and other circuits.

[0106] The wireless charging system provided in this embodiment detects whether the second device to be charged is within the wireless charging range of the charging device through the charging device. If so, a wireless charging communication connection is established between the two, and a transmitting coil that meets the charging parameters of the second device to be charged is selected from the charging device to perform wireless charging for the second device to be charged, thereby achieving independent control of the operation of each transmitting coil in one charging device, thereby achieving wireless charging function for multiple devices to be charged at the same time by one charging device, reducing the cost of products with wireless charging function, improving user experience, and having higher safety.

[0107] Embodiment three:

[0108] The wireless charging method provided by the embodiment of the present invention is described in detail below in conjunction with specific application scenarios. Figure 4 As shown, it is a flow chart of wireless charging from a transmitter to a single receiver.

[0109] In this embodiment, the wireless charging system specifically includes a receiving end and a transmitting end, and the receiving end refers to the first device to be charged and the second device to be charged mentioned in the above embodiment, and the receiving end is a device having a function of wirelessly communicating with other devices to be charged; the transmitting end refers to the charging device mentioned in the above embodiment, and the charging device includes at least one transmitting coil with independent working capability and a power management unit and a charging management unit corresponding to the transmitting coil.

[0110] When the wireless charging transmitter starts working, the power management unit of each transmitting coil provides a normal low-power signal to the corresponding transmitting coil, which is then emitted outward by the transmitting coil. The power management unit also monitors whether there is any power-sucking object entering the effective charging range covered by the normal low-power signal of each transmitting coil.

[0111] In practical applications, there are many ways to implement the step of detecting whether a charging object has entered, such as the change of the magnetic flux of the transmitting coil. If the magnetic flux has changed, it is determined that the second device to be charged has entered the wireless charging range of the charging device.

[0112] If the magnetic flux does not change, the second device to be charged is not within the wireless charging range of the charging device.

[0113] In practical applications, a method for detecting whether an object that draws electricity has entered may also be to detect a sudden change in voltage or a sudden change in power.

[0114] In this embodiment, when the power management unit detects that an object that draws electricity has entered, the power management unit is also notified to perform a detection on whether the object that draws electricity is a foreign object.

[0115] The charging management unit controls the wireless charging transmission control circuit unit to perform foreign object detection on the transmitting coil into which the power-drawing object enters.

[0116] In practical applications, the methods for foreign body detection are as follows:

[0117] The charging management unit inquires with the power-drawing object through the wireless charging transmission control circuit, and if a response is obtained, the power-drawing object is considered to be a valid charging receiving end;

[0118] If there is no response, it is assumed that the object that is drawing power is a foreign object.

[0119] When it is determined that the object is a foreign object, the transmitting end issues a foreign object prompt and requires the power management unit of the transmitting coil to send a low-power signal indicating the presence of a foreign object to the coil.

[0120] In practical applications, the method for sending a low-power signal to indicate the presence of a foreign object is to send the low-power signal in a short time or at a longer interval;

[0121] The normal low-power signal transmission method is that the transmitting coil is always in the low-power signal transmission or the transmission interval is short.

[0122] During the period of sending low-power signals when there is a foreign object, the power management unit of the transmitting coil keeps monitoring the presence of the foreign object. Once the foreign object is removed, the transmitting coil resumes normal low-power signal sending.

[0123] When the object being charged is a responsive wireless charging receiver, the transmitter interacts with the receiver to obtain wireless charging parameters supported by the receiver, such as voltage, current, and power.

[0124] The transmitter selects reasonable charging parameters to charge the receiver based on the available wireless charging parameters and the wireless charging parameters of the receiver. At the same time, the communication link established between the wireless charging transmission control circuit of the transmitter and the wireless charging reception control circuit of the receiver is called the main wireless charging communication link. After charging is completed, the transmitter restores the transmission coil to a normal low-power signal.

[0125] Embodiment 4:

[0126] If the current application scenario is that there are multiple receiving ends that need to perform wireless charging, there may be two situations. One is that multiple receiving ends enter the wireless charging range of the transmitting end at the same time. In this case, wireless charging can be directly established by executing the method provided in the above embodiment 1. Preferably, in the process of establishing wireless charging, one of the multiple receiving ends needs to be selected as a master device, and the others are used as slave devices and establish wireless communication connections with the master device, and the master device establishes a wireless charging communication link with the transmitting end;

[0127] The other is that there is already a receiver in the wireless charging range of the transmitter and is being wirelessly charged. At this time, when a new receiver enters the wireless charging range, the charging process is as follows: Figure 5 shown.

[0128] When the power management unit of the transmitting coil not involved in the wireless charging detects a new object that draws power, the power management unit is informed of the information.

[0129] The charging management unit will first determine whether there is information about the device to be charged. If not, it will be temporarily treated as a foreign object and confirmed in the next step. The information about the device to be charged here is pre-acquired by the receiving end through a wireless communication connection. That is to say, before the receiving end enters the wireless charging range, it has established a communication connection with the receiving end in the wireless charging range through the wireless communication function in advance, and will send the information to the sending end.

[0130] There is no information about the device to be charged in the charging management unit. There are two situations:

[0131] One is that the object that enters the effective charging range of the transmitting coil and draws electricity is indeed a foreign object;

[0132] The other is that the object being charged is a receiver that can support wireless charging, but the receiver does not support simultaneous charging of multiple receivers. It is impossible to pass the information of the receiver to the transmitter through the main wireless charging communication chain because it cannot establish a wireless communication connection with the receiver within the wireless charging range and send the information to the transmitter in advance.

[0133] In order to prevent potential safety hazards caused by the presence of foreign objects, the transmitting coil sends a low-power signal that a foreign object is present, and further confirmation will be made after the wireless charging of the main device is completed.

[0134] In this embodiment, priority is given to supporting wireless charging of multiple receiving terminals, so the wireless power-on of the main device is not suspended to perform foreign object determination, and the wireless charging of the main device is waited for to be completed.

[0135] When the wireless charging of the main device is completed, the charging management unit switches the wireless charging control circuit of the transmitting end to the transmitting coil to further confirm whether it is a foreign object.

[0136] If it is determined that it is not a foreign object, but the receiving end does not support multi-receiving end wireless charging, wireless charging with the receiving end will be performed after the charging of the other receiving ends is completed.

[0137] If it is determined to be a foreign object, the transmitting end will issue a foreign object prompt so that the user can remove the foreign object, and the transmitting coil will send a low-power signal according to the presence of a foreign object until the foreign object is removed, and then resume normal low-power signal sending.

[0138] If the charging management unit has information to be sent to the wireless charging receiver, it needs to prepare for the next step of information exchange confirmation. There are two cases:

[0139] One is that the charging management unit has information about the receiving end to be charged uploaded through the wireless charging communication link of the main device, but it is possible that the receiving end information of another wireless charging transmitting end crosstalks the transmitting end, and the object that draws power from the transmitting end may be a foreign object;

[0140] The other is to enter the receiving end to be charged. At this time, there is information uploaded to the sending end, indicating that the object drawing power may be a receiving end that supports multi-receiving end wireless charging.

[0141] The charging management unit saves the information of each transmitting coil being wirelessly charged, suspends wireless charging, and releases the wireless charging communication link of the main device to the transmitting coil to be detected in order to confirm the foreign object.

[0142] If it is confirmed to be a foreign object, it means that the information stored in the charging management unit is crosstalking to the transmitter. The transmitter removes the receiver information and sends the corresponding transmitter coil a low-power signal according to the presence of a foreign object. After the foreign object is removed, the transmitter coil resumes normal low-power signal transmission. At the same time, after the wireless power-on communication link of the main device is restored, the transmitter notifies the wireless charging receiver of the main device to disconnect the wireless communication connection of the receiver to be charged.

[0143] When it is not a foreign object, the wireless charging of the main device exchanges information with the receiving end to be charged to confirm whether the information in the charging management unit is consistent with the receiving end to be charged.

[0144] If the charging management unit does not have the device information, there are two situations:

[0145] One is that the information of the receiving end has not been uploaded to the charging management unit of the sending end;

[0146] The other is that the receiving end does not support the wireless charging function of multiple receiving ends, and its information cannot be uploaded to the charging management unit of the sending end.

[0147] In the first case, the transmitter takes the receiver as the next device to be confirmed and records the number of times the device confirms the same location, for example, it can be set to two confirmations. When the number of confirmations is exceeded, the device is assumed to not support wireless charging with multiple receivers, and is processed according to the scenario of not supporting wireless charging with multiple receivers.

[0148] If the information between the transmitter and the receiver is confirmed to be correct, the charging management unit of the transmitter will require the transmitting coil to send a basic transmission power, such as 5W, to estimate the transmission efficiency of the wireless charging pairing, so as to evaluate the subsequent transmittable power and select a higher efficiency transmitting coil.

[0149] When the receiving end crosses over multiple transmitting coil combinations, after information confirmation, there will be a transmitting coil with the same receiving end, and the transmitting coil with higher transmission efficiency will be selected for transmission. The other transmitting coils are in normal low-power signal transmission, and it is prompted that there is a device in the cross coil for wireless charging. When all the wireless charging receiving end information is confirmed, the wireless charging communication link is returned to the main wireless charging, and the multiple receiving ends begin wireless charging.

[0150] In practical applications, for the main wireless charging receiving end that is currently performing wireless charging, when a new receiving end enters the wireless charging process, the following flowchart is shown: Figure 6 As shown. When the wireless communication function of the main wireless charging receiving end is joined by a slave device, it indicates that there is a potential receiving end to perform wireless charging. When the slave device uploads its information to the main device, the main device uploads the information to the sending end through the wireless charging communication link. Subsequently, after receiving the sending end's request for receiving end information confirmation, the main device maintains the current wireless charging state, suspends wireless charging, releases the wireless charging communication link, and sets the slave device information confirmation time according to user experience or experimental data, for example, 1 second. If it times out, the slave device information is discarded, the wireless communication connection of the receiving end is disconnected, and the wireless charging communication link is restored, wireless charging continues, and re-detection is made for whether a new receiving end has joined. If there is no timeout, it is considered that the sending end and the slave device have successfully established a temporary wireless charging communication link for information confirmation. Re-restore the wireless charging communication link, and obtain the information confirmation result from the sending end at the same time. If the information verification fails, it means that the slave device is not within the wireless charging range of the sending end, and the information of the slave device is discarded and its wireless communication connection is disconnected. If the information verification is successful, the slave device is added to the wireless charging group to establish multi-receiving end wireless charging.

[0151] like Figure 7 The figure shows the workflow of the receiver when it enters wireless charging. When the receiving coil of the receiver to be charged enters the wireless charging range, that is, after sensing the electric energy, it indicates that there may be a magnetic field generated by a wireless charging transmitter in the vicinity. The receiver sets its wireless communication function to the role of a slave device in order to find the master device. When the receiver does not detect the master device, there are two situations:

[0152] 1. There is currently no other receiving end being charged in the wireless charging environment;

[0153] 2. The transmitter is adapted by a receiver that does not support wireless charging with multiple receivers and is performing wireless charging.

[0154] But in either case, after the receiver fails to search for the main device, it will first try to adapt to the transmitter. If the adaptation fails, it means that the changing magnetic field cannot establish wireless charging with the receiver, which may be the second case.

[0155] At this time, the receiving end will repeatedly adapt with the sending end until the adaptation is successful. If the receiving end and the sending end are successfully adapted, that is, the first case, then the receiving end and the sending end establish a wireless charging communication link.

[0156] After the wireless charging communication link is established, the receiving end interacts with the sending end to confirm whether the sending end supports the multi-receiving end wireless charging function.

[0157] If the transmitter supports the multi-receiver wireless charging function, the wireless charging established this time is considered the main wireless charging, and the receiver sets its wireless communication function to the main device role, waiting for other receivers to join in the wireless charging. If the transmitter does not support the multi-receiver wireless charging function, the receiver will turn off its wireless communication function. After completing the communication function setting, the receiver and the transmitter start wireless charging.

[0158] After the receiver searches for the master device, it indicates that the receiver may have entered an environment that supports wireless charging of multiple receivers. The receiver transmits its relevant information to the master device through the wireless communication channel, and the master device transmits it to the transmitter through the wireless charging communication link, and then waits for information confirmation with the transmitter.

[0159] If the sending end does not receive the request for information confirmation from the receiving end within a certain period of time, the adaptation is considered to have failed. The waiting time can be determined based on the user experience and the rotation time of the sending end, for example, it can be set to 1 second. After the adaptation fails, the adaptation failure is prompted and the next adaptation is repeated. When the receiving end and the sending end establish a temporary wireless charging communication link within a certain period of time, the receiving end and the sending end confirm the information interaction. If the information interaction confirmation fails, it means that crosstalk may occur in the wireless communication function. The receiving end releases the wireless charging communication link, prompts the adaptation failure; and disconnects the wireless communication function, and searches for other main devices again. If the information is confirmed successfully, it means that the receiving end can perform the wireless charging function. The receiving end releases the wireless charging communication link, and after all the receiving ends to be confirmed have completed the information confirmation, the receiving end starts wireless charging.

[0160] In this embodiment, the wireless charging of the device to be charged is not always in the charging state. When the receiving end has the following three situations, the charging of the receiving end may need to be adjusted. The three situations include:

[0161] 1. The transmission efficiency of the charging process is less than a certain value, such as 70%;

[0162] 2. The receiving end requests the end of charging, for example, when the battery is fully charged;

[0163] 3. Information exchange at the receiving end is interrupted, for example, the receiving end is moved away.

[0164] When these three situations occur, the sender considers that the receiver has quit working, and then operates according to the quit workflow, as follows: Figure 8 shown.

[0165] If the receiving end of the master device is removed, the transmitting coil will be restored to normal low-power signal transmission, and the transmitting end will select one from the remaining wireless charging pairs to establish a new master device wireless charging and wireless charging communication link.

[0166] The general selection method can use a group with higher charging efficiency to establish wireless charging of the main device.

[0167] When the receiving end that is not the main device is removed, the charging management unit removes the device information and restores the transmitting coil to normal low-power signal transmission. After completing these operations, the remaining wireless charging combinations continue to perform wireless charging until all wireless charging is completed.

[0168] In this embodiment, during wireless charging, the power management unit of each transmitting coil also needs to monitor the heating state of each coil and transmit the monitored temperature value to the charging management unit. The specific process is as follows: Fig. 9 As shown. The charging management unit determines whether the temperature exceeds the standard. If the temperature exceeds the standard, the charging management unit estimates the current charging efficiency based on the power obtained from the device. According to the pre-established power-efficiency relationship, determine whether the current efficiency is too low. If the current efficiency is too low, this means that the alignment between the transmitting coil and the receiving coil is poor or there is a metal foreign body between the coils that consumes power and generates heat, causing the temperature to rise, so it prompts that the efficiency is too low and stops charging. If the efficiency is within the preset power-efficiency relationship, this indicates that the power loss of the coil itself is high and the transmission power needs to be reduced, so the transmission power is reduced. At this time, the method of reducing power is mainly to reduce the current. Before reducing the transmission power, determine whether the current power is already the minimum power. If the power reaches the lower limit, the user is prompted that the transmission power is too low and charging is stopped. If there is still room for power adjustment, the charging management unit will inform the receiving end to prepare to adjust the transmission power, and the receiving end will also monitor the wireless charging process based on the adjusted power.

[0169] In this embodiment, not only the sending end will monitor the charging temperature, but the receiving end can also monitor it at the same time. The monitoring process is as follows: Fig.10As shown, the charging management unit at the receiving end detects the temperature of the receiving coil. When it is detected that the temperature exceeds the standard, the received wireless charging power parameters, such as voltage and current, are passed to the transmitting end. The transmitting end calculates the relevant efficiency based on the received wireless charging power parameters and feeds it back to the receiving end. If the efficiency is within the allowable range, the receiving end will request the transmitting end to reduce the transmission power. Generally, the default is to adjust the transmitting current. After the power is adjusted, wait for a period of time, such as 10 seconds, and re-detect the temperature. Since the temperature increase caused by heating is a gradual process, even if the power is adjusted, it takes some time to dissipate the heat before the temperature drops. Only when the temperature value is detected again will it reflect the effect of the power adjustment. If the efficiency is too low, the receiving end prompts that the efficiency is too low and informs the transmitting end that the receiving end stops charging.

[0170] In this embodiment, when a slave device finishes charging or is disconnected, the working process of the master device is as follows: Fig.11 As shown. When the slave device is finished charging, the slave device informs the master device through wireless communication that it has completed wireless charging. The master device uploads the status to the sender. After the sender completes the settings, the master device disconnects the wireless communication function of the slave device and removes its device information. Or the wireless communication function between the master device and the slave device is interrupted, which may be due to the failure of the slave device or leaving the current wireless charging range. The master device informs the sender of the status and then removes the information of the slave device.

[0171] In this embodiment, when the receiving end as the slave device suddenly interrupts the wireless charging, the processing steps are as follows: Fig.12 As shown, the first manifestation is that the changing magnetic field cannot be sensed, and thus the induced electric energy cannot be generated. This is because the distance of wireless communication is generally much greater than the electromagnetic induction distance of the applied charging. Therefore, when the slave device leaves the effective range of wireless charging, the first reaction is that the electric energy cannot be sensed. When the receiving end cannot sense electric energy, there are two situations: one is that the slave device is moved out of the effective charging range of the sending end; the other is that the wireless charging sending function of the sending end is turned off. In either case, it indicates that the wireless charging behavior has been interrupted, so the wireless communication function of the slave device is turned off to end the wireless charging work.

[0172] When electric energy is sensed and communication with the master device continues, it means that the wireless charging is working properly and therefore continues. When the communication between the slave device and the master device is interrupted, the slave device needs to establish a new communication connection with the transmitter. If the transmitter establishes a new wireless charging communication link with the slave device at this time, then after the slave device establishes a wireless charging communication link with the transmitter, the receiver is converted to a master device and switches its wireless communication function to the master device role. Subsequently, the receiver will receive connection requests for wireless communications from other slave devices and establish a new wireless charging group. The slave device will not have a request from the receiver to establish a wireless charging communication link for a period of time. After this time, the slave device will try to find a new master device in order to join the new wireless charging group for wireless charging.

[0173] Embodiment five:

[0174] This embodiment provides a wireless charging system. Fig.13 As shown, the system includes a processor 101, a memory 102 and a communication bus 103;

[0175] The communication bus 103 is used to realize the communication connection between the processor 101 and the memory 102;

[0176] The processor 101 is used to execute one or more programs stored in the memory 102 to implement the following steps:

[0177] Detecting whether the second device to be charged is within the wireless charging range of the charging device; the charging device includes at least one transmitting coil with independent working capability;

[0178] If the second device to be charged is within the wireless charging range, a wireless charging communication link is established between the second device to be charged and the charging device, and a device state of the second device to be charged is set, wherein the device state includes a master device state and a slave device state;

[0179] Selecting a transmitting coil in the charging device that meets the charging parameters of the second device to be charged;

[0180] The second device to be charged is charged by controlling the transmitting coil through the established wireless charging communication link.

[0181] In actual applications, when the processor 101 executes a program to detect whether the second device to be charged is within the wireless charging range, it specifically detects whether the magnetic flux of each transmitting coil changes; if the magnetic flux changes, it is determined that the second device to be charged has entered the wireless charging range of the charging device; if the magnetic flux does not change, the second device to be charged is not within the wireless charging range of the charging device.

[0182] If the device state of the second device to be charged is set to a slave device state, after the step of selecting a transmitting coil in the charging device that meets the charging parameters of the second device to be charged, the method further includes:

[0183] Query whether there is a first device to be charged in the wireless charging range and the status is a master device;

[0184] If the first device to be charged exists, a wireless communication connection is established between the second device to be charged and the first device to be charged; the second device to be charged reports its own charging parameters to the charging device through the first device to be charged;

[0185] If the first device to be charged does not exist, a wireless charging communication link is established between the second device to be charged and the charging apparatus, and the state of the second device to be charged is switched from the slave device state to the master device state.

[0186] In this embodiment, after the charging parameters of the second device to be charged are reported to the charging apparatus through the first device to be charged, the method further includes:

[0187] Determine whether the identity authentication information of the second device to be charged exists in the management unit;

[0188] If so, the wireless charging communication link between the charging device and the first device to be charged will be disconnected, and the wireless charging communication link between the charging device and the second device to be charged will be established.

[0189] In another embodiment, after step S104, the method further includes:

[0190] Acquiring performance parameters of the second device to be charged through the wireless charging communication link;

[0191] Determining whether the second device to be charged supports multi-device charging according to the performance parameter;

[0192] If supported, query whether there is a first device to be charged in the master device state within the wireless charging range;

[0193] The charging of the second device to be charged is controlled according to the query result.

[0194] If it is not supported, maintain the wireless charging connection of the second device to be charged and only charge it; or disconnect the wireless charging connection of the second device to be charged, and set its charging priority to the lowest priority, wait for the charging device to complete charging the device to be charged that supports multi-device charging, and then start charging the device that does not support multi-device charging.

[0195] In this embodiment, controlling the charging of the second device to be charged according to the query result includes:

[0196] If the first device to be charged exists within the wireless charging range, a wireless communication connection is established between the second device to be charged and the first device to be charged; the second device to be charged reports its real-time charging data to the charging device through the first device to be charged;

[0197] If the first device to be charged does not exist within the wireless charging range, the second device to be charged is set to a master device state.

[0198] Correspondingly, an embodiment of the present invention further provides a computer-readable storage medium, which includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program modules or other data). Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable read only memory), flash memory or other memory technology, CD-ROM (Compact Disc Read-Only Memory), digital versatile disk (DVD) or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage device, or any other medium that can be used to store desired information and can be accessed by a computer.

[0199] The computer-readable storage medium in this embodiment can be used to store one or more computer programs, and the one or more computer programs stored therein can be executed by a processor to implement at least one step of the wireless charging method in the above-mentioned embodiment 1.

[0200] This embodiment also provides a computer program, which can be distributed on a computer-readable medium and executed by a computing device to implement at least one step of the wireless charging method in the above embodiment 1, and in some cases, at least one step shown or described can be executed in an order different from that described in the above embodiment.

[0201] This embodiment further provides a computer program product, including a computer-readable device, on which the computer program shown above is stored. In this embodiment, the computer-readable device may include the computer-readable storage medium shown above.

[0202] In summary, the wireless charging method and system thereof, and computer-readable storage medium provided in the embodiments of the present invention detect whether the second device to be charged is within the wireless charging range of the charging device. If so, a wireless charging communication connection is established between the two, and a transmitting coil that meets the charging parameters of the second device to be charged is selected from the charging device to perform wireless charging for the second device to be charged, thereby achieving independent control of the operation of each transmitting coil in a charging device, thereby achieving wireless charging function for multiple devices to be charged at the same time, reducing the cost of products with wireless charging functions, improving user experience, and having higher safety.

[0203] It can be seen that those skilled in the art should understand that all or some of the steps, systems, and functional modules / units in the above disclosed methods can be implemented as software (which can be implemented with computer program code executable by a computing device), firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component can have multiple functions, or a function or step can be performed by several physical components in cooperation. Some or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit.

[0204] In addition, it is well known to those skilled in the art that communication media generally contain computer readable instructions, data structures, computer program modules or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery media. Therefore, the present invention is not limited to any specific hardware and software combination.

[0205] The above contents are further detailed descriptions of the embodiments of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A wireless charging method, characterized in that: The method comprises: Detecting whether the second device to be charged is within the wireless charging range of the charging device; the charging device includes at least one transmitting coil with independent working capability and at least one management unit; If the second device to be charged is within the wireless charging range, a wireless charging communication link is established between the second device to be charged and the charging device, and a device state of the second device to be charged is set, wherein the device state includes a master device state or a slave device state; Selecting a transmitting coil in the charging device that meets the charging parameters of the second device to be charged; Controlling the transmitting coil to charge the second device to be charged through the established wireless charging communication link; If the device state of the second device to be charged is set to a slave device state, query whether there is a first device to be charged that is a master device within the wireless charging range; if the first device to be charged exists, establish a wireless communication connection between the second device to be charged and the first device to be charged; the second device to be charged reports its own charging parameters to the charging device through the first device to be charged.

2. The wireless charging method according to claim 1, wherein: The method further comprises: If the first device to be charged does not exist, a wireless charging communication link is established between the second device to be charged and the charging apparatus, and the state of the second device to be charged is switched from the slave device state to the master device state.

3. The wireless charging method according to claim 2, wherein: After the charging parameter of the second device to be charged is reported to the charging apparatus through the first device to be charged, the method further includes: Determine whether the identity authentication information of the second device to be charged exists in the management unit; If so, the wireless charging communication link between the charging device and the first device to be charged will be disconnected, and the wireless charging communication link between the charging device and the second device to be charged will be established; If not, the second device to be charged is marked and retained until the next judgment.

4. The wireless charging method according to claim 1, wherein: After controlling the transmitting coil to charge the second device to be charged through the established wireless charging communication link, the method further includes: Acquiring performance parameters of the second device to be charged through the wireless charging communication link; Determining whether the second device to be charged supports multi-device charging according to the performance parameter; If supported, query whether there is a first device to be charged in the master device state within the wireless charging range; The charging of the second device to be charged is controlled according to the query result.

5. The wireless charging method according to claim 4, characterized in that: The controlling the charging of the second device to be charged according to the query result includes: If the first device to be charged exists within the wireless charging range, a wireless communication connection is established between the second device to be charged and the first device to be charged; the second device to be charged reports its real-time charging data to the charging device through the first device to be charged; If the first device to be charged does not exist within the wireless charging range, the second device to be charged is set to a master device state.

6. The wireless charging method according to any one of claims 1 to 5, characterized in that: After determining that the second device to be charged is within the wireless charging range, the method further includes: Determining whether the second device to be charged is a foreign object; If so, the transmitting coil corresponding to the location of the foreign object is determined, and the transmitting coil is controlled to continuously transmit the low-power signal of the foreign object.

7. The wireless charging method according to claim 6, wherein: Controlling the transmitting coil to charge the second device to be charged through the established wireless charging communication link includes: adjusting the transmission power of the transmitting coil according to the charging parameters of the second device to be charged, and evaluating the transmission efficiency of charging; The final transmission power of the transmitting coil for charging the device to be charged is determined according to the evaluation result.

8. The wireless charging method according to any one of claims 1 to 5, characterized in that: After controlling the transmitting coil to charge the second device to be charged through the established wireless charging communication link, the method further includes: Detecting whether all devices to be charged within the wireless charging range of the charging device need charging adjustment; A corresponding charging adjustment strategy is determined according to the detection result, and charging adjustment control is performed on the device to be charged.

9. The wireless charging method according to claim 8, characterized in that: The detecting whether all the devices to be charged within the wireless charging range of the charging device need to be charged and adjusted includes: Detect the temperature value generated between the charging device and each device to be charged; determine whether the temperature value is greater than a preset temperature value; if so, reduce the transmission power of the transmitting coil or disconnect the transmitting coil to charge the device to be charged, and restore the transmitting coil to normal low-power signal transmission; Alternatively, determine whether the device to be charged meets the conditions for disconnecting charging, the conditions including receiving a request to disconnect charging and / or the charging transmission efficiency being less than a preset value; if met, disconnect the transmitting coil to charge the device to be charged, and restore the transmitting coil to normal low-power signal transmission.

10. The wireless charging method according to claim 9, wherein: If the state of the device to be charged that is disconnected from charging is a master device state, after disconnecting the transmitting coil to charge the device to be charged, it also includes: selecting a device to be charged from the remaining devices to be charged in the charging device to adjust its state to the master device state, and establishing a wireless charging communication link between the two.

11. A wireless charging system, characterized in that: include: At least one second device to be charged and a charging device for providing power supply to the second device to be charged, wherein the charging device includes at least one transmitting coil with independent working capability and at least one management unit; The charging device detects whether the second device to be charged is within the wireless charging range of the charging device; If the second device to be charged is within the wireless charging range, the charging device establishes a wireless charging communication link between the second device to be charged and the charging device, and sets a device state of the second device to be charged, wherein the device state includes a master device state or a slave device state; The charging device selects a transmitting coil that meets the charging parameters of the second device to be charged; The charging device controls the transmitting coil to charge the second device to be charged through the established wireless charging communication link; When the charging device sets the device status of the second device to be charged to the slave device status, the second device to be charged is also used to query whether there is a first device to be charged whose status is a master device within the wireless charging range; if the first device to be charged exists, a wireless communication connection is established between the second device to be charged and the first device to be charged; and its own charging parameters are reported to the charging device through the first device to be charged.

12. The wireless charging system according to claim 11, wherein: The second device to be charged is also used for: If the first device to be charged does not exist, a wireless charging communication link is established between the second device to be charged and the charging apparatus, and the state of the second device to be charged is switched from the slave device state to the master device state.

13. The wireless charging system according to claim 12, wherein: The charging device is also used to determine whether the identity authentication information of the second device to be charged exists in the management unit; if so, the wireless charging communication link between the charging device and the first device to be charged will be disconnected, and a wireless charging communication link between the charging device and the second device to be charged will be established; if not, the second device to be charged will be marked and retained until the next judgment.

14. The wireless charging system according to claim 11, wherein: The charging device is also used to obtain performance parameters of the second device to be charged through the wireless charging communication link; and determine whether the second device to be charged supports multi-device charging according to the performance parameters; If supported, query whether there is a first device to be charged in the master device state within the wireless charging range; The charging of the second device to be charged is controlled according to the query result.

15. The wireless charging system according to claim 14, wherein: The charging device is used to establish a wireless communication connection between the second device to be charged and the first device to be charged when the first device to be charged is within the wireless charging range; the second device to be charged reports its real-time charging data to the charging device through the first device to be charged; and when the first device to be charged is not within the wireless charging range, the second device to be charged is set to the master device state.

16. A wireless charging system, characterized in that: comprising a processor (101), a memory (102) and a communication bus (103); The communication bus (103) is used to realize the communication connection between the processor (101) and the memory (102); The processor (101) is used to execute one or more programs stored in the memory (102) to implement the steps of the wireless charging method according to any one of claims 1 to 10.

17. A computer-readable storage medium storing one or more computer programs, wherein the one or more computer programs can be executed by one or more processors (101) to implement the steps of the wireless charging method according to any one of claims 1 to 10.

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