WO2020064024A1 - Wireless charging method and system, and computer readable storage medium - Google Patents

Abstract

Provided are a wireless charging method and system, and a computer readable storage medium. The method comprises: detecting whether a second device to be charged is located within a wireless charging range of a charging apparatus; if yes, establishing a wireless charging communication connection between the two, and selecting from within the charging apparatus a transmitting coil, which satisfies charging parameters of the second device to be charged, to perform wireless charging for the second device to be charged.

Description

Wireless charging method and system, and computer-readable storage medium

cross reference

The present invention claims the priority of a Chinese patent application filed with the Chinese Patent Office on September 27, 2018, with an application number of 201811130213.0 and an invention name of "a wireless charging method and system, and a computer-readable storage medium". The contents are incorporated in the present invention by reference.

Technical field

The embodiments of the present invention relate to, but are not limited to, the technical field of wireless charging, and in particular, to a wireless charging method and system, and a computer-readable storage medium.

Background technique

With the continuous development of terminal technology, especially in the direction of power supply, for the realization of fast and convenient charging technology, the current use standard is mainly the Qi standard of WPC (Wireless Power Consortium, Wireless Charging Alliance), which adopts the electromagnetic induction method , The power is sent from the transmitting coil and transmitted to the receiving coil in a non-contact manner.

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 coil and the receiving coil to achieve the highest transmission efficiency, so it only supports one transmitting end. Works with 1 receiver at the same time. Therefore, in order to place the receiving end and the transmitting end at the best efficiency coil. In the design of the related technology, a method of designing multiple coils on the transmitting end is used to solve the problem. However, when the charging circuit of this structure performs wireless charging, only two coils aligned at the transmitting end and the receiving end are selected. Power transmission. Because this standard only supports the one-to-one working mode, even if there are multiple transmission coils, they cannot be fully utilized, and the design of multiple transmission coils is only to facilitate the determination of high-efficiency transmission coils, so a single transmission cannot be achieved. The problem of charging multiple receivers at the same time by multiple receivers or multiple receivers at the same time, especially with more terminals, when such a charging circuit is compatible with multiple receivers, the effective charging time ratio will be Become smaller, and in the entire wireless charging process, it is difficult to achieve real-time monitoring of the charging process.

Summary of the Invention

A wireless charging method, a terminal, and a computer-readable storage medium provided by the embodiments of the present invention mainly solve the technical problems of the technical problem that the current wireless charging method cannot implement a wireless charger to charge multiple terminals simultaneously. .

To solve the above technical problems, an embodiment of the present invention provides a wireless charging method, where the method includes:

Detecting whether the second device to be charged is located within a wireless charging range of the charging device; the charging device includes at least one transmitting coil having a separate working capability; if the second device to be charged is located within the wireless charging range, establishing the first A wireless charging communication link between the second to-be-charged device and the charging device, and setting a device state of the second to-be-charged device, the device status including a master device status and a slave device status; selecting the charging device A sending coil that meets the charging parameters of the second to-be-charged device; and controlling the sending coil to charge the second to-be-charged device through the established wireless charging communication link and the device state.

In order to solve the above technical problem, an embodiment of the present invention further provides a wireless charging system, including: at least one second to-be-charged device and a charging device for supplying power to the second to-be-charged device, the charging device Including at least one transmitting coil having an independent working capability; the charging device detecting whether the second device to be charged is located within a wireless charging range of the charging device;

If the second device to be charged is located within a 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 the second device to be charged Device status including the status of the master device and the status of the slave device; the charging device selects a sending coil that satisfies the charging parameters of the second device to be charged; and the charging device is controlled by the established wireless charging communication link The transmitting coil charges the second device to be charged.

In order 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; the communication bus is used to implement a communication connection between the processor and the memory; the processing The controller is used to execute one or more programs stored in the memory to implement the steps of the wireless charging method as described above.

In order to solve the above technical problem, an embodiment of the present invention further provides a computer-readable storage medium. The computer-readable storage medium stores one or more computer programs, and the one or more computer programs may be stored in one or more computer programs. Each processor performs steps to implement the wireless charging method as described above.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic flowchart of a wireless charging method according to an embodiment of the present invention;

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

3 is a schematic structural diagram of another embodiment of a wireless charging system according to the present invention;

4 is a schematic flowchart of a wireless charging process performed by a transmitting end to a single receiving end according to an embodiment of the present invention;

5 is a schematic flowchart of a wireless charging process performed by a transmitting end to multiple receiving ends according to an embodiment of the present invention;

6 is a schematic flowchart of a process in which a master device accesses a slave device according to an embodiment of the present invention;

7 is a flowchart of a wireless charging operation performed by a receiving end according to an embodiment of the present invention;

FIG. 8 is a schematic flowchart of a process in which a receiving end exits wireless charging according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic flowchart of temperature monitoring at a transmitting end according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic flowchart of temperature monitoring at a receiving end according to an embodiment of the present invention; FIG.

11 is a schematic flowchart of a master device working when a slave device stops according to an embodiment of the present invention;

12 is a schematic flowchart of a slave device interrupting work according to an embodiment of the present invention;

FIG. 13 is another schematic structural diagram of a wireless charging system according to an embodiment of the present invention.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the embodiments of the present invention in detail through specific implementations and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

Embodiment one:

At present, in order to solve the problem that it is difficult to determine the location between the receiving end (that is, the device to be charged) and the transmitting end (that is, the charging device), the WPC organization and many manufacturers have adopted multiple wireless charging coils (that is, transmitting coils) at the transmitting end or It is implemented by setting multiple sets of charging control circuits, etc. After the transmitting end has more stacked coils or charging control circuits, the way of placing it is more free for the receiving end. When the receiving end enters the effective charging range of the transmitting end, the transmitting end selects a 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 on the transmitting end polls each transmitting coil in order to determine which transmitting coil has the highest transmission efficiency between the receiving coils, so that the transmitting coil and the receiving end are selected for wireless charging. The multi-coil method at the transmitting end is just a more convenient way to align the coils at the transmitting and receiving ends. After entering the charging process, only one coil participates in charging at the transmitting end. Even if a receiving end is placed at this time, the transmitting end will not respond to the wireless charging demand of the new receiving end, which makes the use of wireless charging devices. The scope is too restrictive for one-to-one use. Aiming at such a charging limitation, the present invention adds a power management unit to each transmission coil on the charging device, and the power management unit in the charging device performs charging control and detection control of the device to be charged, thereby selecting a corresponding one. The transmitting coil provides power for the device to be charged; at the same time, in order to monitor the charging process of the charging device to the charging device in real time, a wireless communication module is also set on the receiving end, and the charging information between the receiving end and the receiving end is realized through the wireless communication module. The interaction is then fed back to the sending end by one of the receiving ends. Based on the above hardware, an embodiment of the present invention provides a one-to-many wireless charging method for a charging device to solve the foregoing problems.

In the embodiment of the present invention, for implementing a one-to-many wireless charging method, it may be a method of charging one device corresponding to multiple devices, or a method of charging multiple devices corresponding to multiple devices, and a many-to-many process. It is to choose the one closer to the device as the main charging coil of the device.

The wireless charging method provided in this embodiment is shown in FIG. 1. The specific control steps of the method include: S101: detecting whether a second device to be charged is located within a wireless charging range of a charging device.

Wherein, the second to-be-charged device is a device having a function for wireless communication with other to-be-charged devices, the charging device includes at least one management unit and at least one transmitting coil having a separate working capability, and the management unit The control unit is used to control the independent charging work of the transmitting coil, and the management unit specifically includes a power management unit and a charging management unit.

Further, this step may be specifically implemented by detecting whether the magnetic flux of each transmitting coil has changed; if the magnetic flux has changed, determining that the second device to be charged has entered the wireless of the charging device. Within the charging range; if the magnetic flux has not changed, the second device to be charged is not within the wireless charging range of the charging device.

In practical 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 respond to the normal low-power signal sent by the transmitting coil. The magnetic field of the transmitting coil will decrease. At this time, the second to-be-charged device is considered to be in the wireless charging range. The normal low-power signal transmission method is that the transmitting coil is always in the low-power signal transmission or interval. Shorter time to send.

In other embodiments, the determination of whether the second device to be charged is within the wireless charging range may also be implemented by detecting a sudden change in voltage or a sudden change in power. Of course, this detection method is not limited to the above-mentioned method. There are other ways.

S102: If the detection result of step S101 is yes, establish a wireless charging communication link between the second device to be charged and the charging device, and set the device status of the second device to be charged.

In this step, the device status includes a master device status and a slave device status. In practical applications, when the second to-be-charged device is the first to-be-charged device within the wireless charging range of the charging device, The device state of the second to-be-charged device is set as the master device state. If it is not, the device state is set as the slave device. Of course, it can also be adjusted and set according to the actual situation.

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 used to charge the second device to be charged, and the communication connection is used to implement the charging device and the second A link for information exchange between the devices to be charged.

S103: Select a sending coil in the charging device that meets the charging parameters of the second device to be charged.

S104: Control the sending coil to charge the second device to be charged through the established wireless charging communication link.

Specifically, when charging the second to-be-charged device, it is specifically implemented through a wireless charging connection in a wireless charging communication link.

In this embodiment, if the setting of the device state of the second to-be-charged device is a slave state, after the step of selecting a sending coil in the charging device that satisfies the charging parameters of the second to-be-charged device And further includes: querying whether there is a first to-be-charged device whose device status is a master device within the wireless charging range; if the first to-be-charged device exists, establishing the second to-be-charged device and the first Wireless communication connection between the devices 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; if the first device to be charged does not exist, Establishing a wireless charging communication link between the second to-be-charged device and the charging device, and switching a state of the second to-be-charged device from the slave device state to the master device state.

In this embodiment, after the charging parameter of the second to-be-charged device is reported to the charging device through the first to-be-charged device, it further includes: determining whether the second to-be-charged device exists in the management unit. Identity verification information of the charging device; if it exists, the wireless charging communication link between the charging device and the first to-be-charged device will be disconnected, and wireless charging communication between the charging device and the second to-be-charged device will be established link.

If it does not exist, mark it as a foreign object, and continue to perform the detection of the next to-be-charged device, until all the to-be-charged devices that pass the identity verification information are charged, and return to continue to detect the foreign object.

In another embodiment, after step S104, the method further includes: obtaining the performance parameter of the second to-be-charged device through the wireless charging communication link; and determining whether the second to-be-charged device supports according to the performance parameter. Multi-device charging; if supported, query whether there is a first to-be-charged device whose device status is the master device within the wireless charging range; and perform charging control on the second to-be-charged device according to the result of the query.

If not, keep the wireless charging connection of the second to-be-charged device and only charge it; or disconnect the wireless charging connection of the second to-be-charged device and set its charging priority to the lowest priority and wait After the charging device finishes charging the to-be-charged device that supports multi-device charging, it starts charging the device that does not support multi-device charging.

In practical applications, determining whether the second to-be-charged device supports multi-device charging according to the performance parameter may also be implemented in setting step S102, that is, while establishing a wireless charging communication link, Including whether the device to be charged has the function of supporting multi-device charging. If so, after the device to be charged enters the wireless charging range in the future, if the device to be charged also has the function of supporting multi-device charging, it can be established by The wireless connection link between the devices realizes the information exchange, and only one communication device to be charged is connected to the charging device, which can also reduce the communication power consumption of the charging device.

In this embodiment, the performing charging control on the second to-be-charged device according to a query result includes: if the first to-be-charged device exists within the wireless charging range, establishing the second to-be-charged device Wireless communication connection with the first to-be-charged device; the second to-be-charged device reports its real-time charging data to the charging device through the first to-be-charged device; The first device to be charged exists, and the second device to be charged is set to a master device state.

In this embodiment, in order to improve the safety performance of the wireless charging process, after step S101 and before step S102, the method further includes: determining whether the second device to be charged is a foreign object; if so, determining the location of the foreign object A corresponding transmitting coil, and controlling the transmitting coil to continuously send a low-power signal of the foreign object, the low-power signal may be sent in a short time or a longer interval to mark the foreign object.

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

In this embodiment, the step of controlling the sending coil to charge the second to-be-charged device through the established wireless charging communication link specifically includes: adjusting the according to the charging parameters of the second to-be-charged device. The transmission power of the transmission coil is used to evaluate the transmission efficiency of charging; the final transmission power of the transmission coil to charge the device to be charged is determined according to the evaluation result.

In some other embodiments, after the step of controlling the sending coil to charge the second to-be-charged device through the established wireless charging communication link, the method further includes: detecting a location within a wireless charging range of the charging device. Whether all the devices to be charged need to be adjusted for charging; a corresponding charging adjustment strategy is determined according to the detection result, and the charging control is performed on the devices to be charged.

The detecting whether all the devices to be charged located within the wireless charging range of the charging device need to be adjusted for charging includes one of the following methods.

Method 1: Detect a 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 transmission coil or disconnect the transmission coil Charging the device to be charged and returning the transmitting coil to a normal low-power signal transmission. This method can be implemented from the side of the charging device, or from the side of the device to be charged.

Method 2: Determine whether the device to be charged meets a condition for disconnecting the charging, the condition includes receiving a request to disconnect the charging and / or the transmission efficiency of the charging is less than a preset value; if it is satisfied, the transmitting coil is disconnected Charging the device to be charged and returning the transmitting coil to a normal low-power signal transmission.

In this embodiment, if the state of the to-be-charged device that is disconnected and charged is the state of the main device, after disconnecting the transmitting coil to charge the to-be-charged device, the method further includes: from the charging device One of the remaining to-be-charged devices is selected, and its device state is adjusted to the state of the main device, and a wireless charging communication link between the adjusted main device and the charging device is established.

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, and if so, establishes a wireless charging communication connection between the two, and selects from the charging device to satisfy the second The sending coil of the charging parameter of the device to be charged wirelessly charges the second device to be charged, so that a charging device can perform separate charging control for the work of each sending coil separately, so that one charging device can simultaneously charge multiple to-be-charged devices. The device performs wireless charging function, reduces the cost of wireless charging function products, improves user experience, and has high security.

At the same time, through the wireless communication connection established between the to-be-charged device and the to-be-charged device, real-time charging information of all the to-be-charged devices is aggregated to a to-be-charged device as the master device and sent to the charging device, and the charging device charges each to-be-charged according to the information The charging of the device is monitored and controlled in real time, which further realizes one-to-many wireless charging of the charging device, and also improves the charging safety and compatibility.

Embodiment two:

FIG. 2 is a schematic structural diagram of a wireless charging system according to an embodiment of the present invention. The system includes: at least one second to-be-charged device 21 and a charging device 22 for supplying power to the second to-be-charged device 21. The charging device 22 includes at least one transmitting coil 221 with an independent working capability, wherein: the charging device 22 detects whether the second device to be charged 21 is located within a wireless charging range of the charging device 22; If the charging device 21 is located within the wireless charging range, the charging device 22 establishes a wireless charging communication link between the second to-be-charged device 21 and the charging device 22, and sets the Device status, the device status includes the status of the master device and the status of the slave device; the charging device 22 selects a sending coil that satisfies the charging parameters of the second to-be-charged device 21; and the charging device 22 passes the established wireless charging communication chain The control circuit controls the transmitting coil 221 to charge the second to-be-charged device 21.

In this embodiment, the system further includes a first to-be-charged device 23, where the first to-be-charged device 23 and the second to-be-charged device 22 may be the same terminal or different, but both are Terminals with wireless communication functions can establish a wireless communication connection after they are close to a certain distance to achieve mutual information interaction.

In this embodiment, when the charging device 22 sets the device state of the second to-be-charged device 21 to the slave state, the second to-be-charged device 21 is further configured to query whether it is within the wireless charging range. Whether there is a first to-be-charged device 23 whose status is the master device; if it exists, establish a wireless communication connection between the second to-be-charged device 21 and the first to-be-charged device 23; pass its own charging parameters The first device to be charged 23 is reported to the charging device 22; if it does not exist, a wireless charging communication link between the second device to be charged 21 and the charging device 22 is established, and the first The state of the two devices to be charged 21 is switched from the state of the slave device to the state of the master device.

In this embodiment, after reporting the charging parameter of the second to-be-charged device 21 to the charging device 22 through the first to-be-charged device 23, the method further includes: the charging device 22 determines whether the second device exists Identity verification information of the device to be charged 21; if it exists, the wireless charging communication link between the charging device 22 and the first device to be charged 23 will be disconnected, and the charging device 22 and the second device to be charged will be established The wireless charging communication link of the device 21.

If it does not exist, mark it as a foreign object, and continue to perform the detection of the next to-be-charged device, until all the to-be-charged devices that pass the identity verification information are charged, and return to continue to detect the foreign object.

In this embodiment, the charging device 22 is further configured to obtain a performance parameter of the second to-be-charged device 21 through the wireless charging communication link; and determine whether the second to-be-charged device 21 is based on the performance parameter. Multi-device charging is supported; if supported, query whether there is a first to-be-charged device 23 in the wireless charging range whose status is master; and perform charging control on the second to-be-charged device 21 according to the result of the query.

In this embodiment, the charging device 22 is configured to establish a connection between the second to-be-charged device 21 and the first to-be-charged device 23 when the first to-be-charged device 23 exists in the wireless charging range. Wireless communication connection; the second charging device 21 reports its real-time charging data to the charging device 22 through the first charging device 23; the first charging device does not exist within the wireless charging range. When the charging device 23 is set, the second to-be-charged device 21 is set to a master device state.

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

The power conversion circuit 222 of the charging device 22 converts the external input power into the power supply required during the wireless charging process; the wireless charging transmission control circuit 223 is used for communication with the wireless charging communication link, and encodes and decodes the information of the communication process. Control, and foreign object detection functions; the second charging management unit 224 is used to manage the transmission power management and adaptation of each transmitting coil 221 to be charged devices (that is, the second to be charged device 21 and / or the first to be charged device 23) Perform information management; the sending 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 sending coil 221 and the detection receiving coil 211. The power management unit 225 detects that an object has entered the charging range of the transmission 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 related foreign object detection and information interaction according to the current state, and informs the device to be charged according to the interactive information that the wireless charging environment supports a multi-receiver wireless charging function; according to the interaction The result is used to manage wireless charging of the corresponding sending coil 221 or multiple to-be-charged devices; after the charging of the sending coil 221 of the charging device 22 is completed, the sending coil 221 is restored to the default state. The wireless charging transmission control circuit 223 may be a control device similar to the WPC specification; the second charging management unit 224 may be implemented by a functional circuit with a microprocessor, and the power management unit 225 may be a DC-to-AC inverter circuit and an output power source. Monitoring can be achieved by realizing the AC power of a certain frequency and monitoring its voltage value and temperature monitoring of the transmission coil 221; the transmission coil 221 can be a coil wound by copper wire or printed by a flexible circuit board at a certain frequency To reach a certain inductance value.

The magnetic field induced by the receiving coil 211 of the to-be-charged device (that is, the second to-be-charged device 21 and / or the first to-be-charged device 23) is converted into an alternating power source; the wireless charging receiving control circuit 212 converts the alternating power source into a DC power source The information coding and decoding of the wireless charging communication link communication and communication process; the first charging management unit 213 manages the power supply information of the charging process and controls the role of the master and slave devices of the wireless communication; the wireless communication unit 214 is used to transfer information. After the receiving coil 211 senses the electric energy, the first charging management unit 213 searches the master device by controlling the wireless communication unit 214 to find out whether it is in a wireless charging environment that supports multiple to-be-charged devices, or after interacting with the charging device 22, wirelessly communicates The function is placed on the main device to indicate that the wireless charging environment supports wireless charging of multiple standby charging devices. The wireless charging receiving control circuit 212 can be a control device similar to the WPC specification, and also includes a conversion circuit that converts AC power to DC power. The receiving coil 211 can be a copper wire winding or a coil printed on a flexible circuit board. A certain inductance value is reached at a frequency, and the inductance value can achieve the best induction for the changing magnetic field generated by the transmitting coil; the first charge management unit 213 can be monitored by the microprocessor, the voltage and current detection circuit, and the temperature of the environment of the receiving coil 211 The wireless communication unit 214 can be implemented by circuits such as infrared, Bluetooth, near field communication NFC, WIFI or Zigbee.

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, and if so, establishes a wireless charging communication connection between the two, and selects from the charging device to satisfy the The sending coil of the charging parameter of the second to-be-charged device wirelessly charges the second to-be-charged device, so that each charging coil can be individually controlled in a charging device, so that one charging device can simultaneously charge multiple to-be-charged devices. The charging device performs the wireless charging function, reduces the cost of the wireless charging function product, improves the user experience, and has high safety.

Embodiment three:

The following provides a detailed description of the wireless charging method provided by the embodiment of the present invention in combination with specific application scenarios. Referring to FIG. 4, it is a flowchart of wireless charging performed by a transmitting end to a single receiving end.

In this embodiment, the wireless charging system specifically includes a receiving end and a transmitting end, and the receiving end refers to the first to-be-charged device and the second to-be-charged device mentioned in the above embodiment, and the receiving end has a useful function Device for wireless communication with other devices to be charged; the transmitting end refers to the charging device mentioned in the above embodiment, the charging device includes at least one transmitting coil with a separate working capability and a power source corresponding to the transmitting coil Management unit, charging management unit.

When the wireless charging transmitter starts to work, the power management unit of each transmission coil provides the normal low-power signal to the corresponding transmission coil and is transmitted outward by the transmission coil, and the power management unit monitors the normal low-power signal of each transmission coil. Whether there is any electricity-collecting object in the covered effective charging range.

In practical applications, there are many ways to implement the method of detecting whether a power-collecting object enters this step, such as a change in the magnetic flux of a transmission coil. If the magnetic flux changes, determine the second to-be-charged The device has entered the wireless charging range of the charging device; if the magnetic flux has not changed, the second device to be charged is not within the wireless charging range of the charging device.

In practical applications, the way to detect whether a power-collecting object has entered may also be to detect a sudden change in voltage or a sudden change in power.

In this embodiment, after the power management unit detects that a power-collecting object has entered, it further includes notifying the charging management unit to notify the detection of whether the power-collecting object is a foreign object.

The charging management unit controls the wireless charging transmission control circuit unit to detect a foreign object on a transmission coil where a power-collecting object enters.

In practical applications, the method for detecting foreign objects is as follows: the charging management unit inquires with the power-collecting object through a wireless charging sending control circuit, and if it receives a response, the power-collecting object is considered to be an effective charging receiving end; if there is no In response, it is assumed that the power-collection object is a foreign object.

When it is determined that the object is a foreign object, the transmitting end makes a prompt of the foreign object, and requests the power management unit of the transmitting coil to send a low-power signal of the presence of a foreign object to the coil.

In practical applications, the transmission method of the low-power signal that indicates the presence of a foreign object is to transmit the low-power signal using a short time transmission or a long interval;

The normal low-power signal transmission mode is that the transmission coil is always in the low-power signal transmission or the interval is short.

During the transmission of a low-power signal of 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 returns to the normal low-power signal transmission.

When the power-collecting object is a responsive wireless charging receiving end, the transmitting end interacts with the receiving end to obtain wireless charging parameters that the receiving end can support, such as voltage, current, and power.

The transmitting end selects a reasonable charging parameter to charge the receiving end according to the available wireless charging parameters and the receiving end's wireless charging parameters. Meanwhile, the communication link established between the wireless charging transmission control circuit at the transmitting end and the wireless charging reception control circuit at the receiving end is referred to as a main wireless charging communication link. Until the end of charging, the transmitting end will return the transmitting coil to the normal low power signal.

Embodiment 4:

If the current application scenario is that there are multiple receivers that need to be wirelessly charged, there may be two situations. One is that multiple receivers simultaneously enter the wireless charging range of the sender. At this time, you can directly execute the above embodiment. A provided method is to establish wireless charging. Preferably, in the process of establishing wireless charging, it is also necessary to select one of a plurality of receivers as a master device, and the other as a slave device and establish a wireless communication connection with the master device. The device establishes a wireless charging communication link with the sending end; the other is that the receiving end already exists in the wireless charging range of the sending end and wireless charging is in progress. When a new receiving end enters the wireless charging range, The charging process is shown in Figure 5.

When the power management unit of the transmitting coil that is not involved in wireless charging detects a new power-collecting object, it notifies the charging management unit of this information.

The charging management unit first determines whether there is information about the device to be charged. If it does not, it is temporarily regarded as a foreign object, and it will be confirmed in the next step. The information of the device to be charged is obtained in advance by the receiving end through a wireless communication connection. That is to say, before the receiving end enters the wireless charging range, it has previously established a communication connection with the receiving end within the wireless charging range through the wireless communication function, and will send the information to the sending end.

There is no information about the device to be charged in the charging management unit. There are two cases: one is that the power-collecting object that enters the effective charging range of the sending coil is indeed a foreign body; the other is that the power-collecting object can support wireless Charging receiver, but the receiver does not support the simultaneous charging of multiple receivers, it is impossible to transfer the information of the receiver to the sender through the main wireless charging communication chain, because it cannot establish a wireless connection with the receiver within the wireless charging range. The communication connection sends information to a sending end in advance.

In order to prevent a potential safety hazard due to the presence of a foreign object, the transmitting coil sends a low-power signal of the foreign object at this time, and then further confirms after the wireless charging of the host device is completed.

In this embodiment, the wireless charging method that supports multiple receivers is given priority. Therefore, the wireless power supply of the master device is not suspended to determine the foreign object, so the wireless charging of the master device is waited for.

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

If it is determined that it is not a foreign object, but the receiving end does not support multi-receiving wireless charging, wireless charging with the receiving end is performed after the remaining receiving ends are charged.

If it is judged to be a foreign object, the sending end prompts the foreign object so that the user removes the foreign object, and the transmitting coil will send a low-power signal according to the presence of the foreign object. After the foreign object is removed, the normal low-power signal is resumed.

If the charging management unit has information to be received by the wireless charging receiver, it needs to prepare for the next step of information interaction confirmation. There are also two cases: one is that the charging management unit has the information of the receiving end to be charged uploaded through the wireless charging communication link of the main device, but the receiving end information of another wireless charging transmitting end may cross the transmitting end, The power-collecting object that enters the transmitting end may be some foreign body; the other is the receiving end that is to be charged. At this time, there is information uploaded to the sending end, indicating that the power-collection object may be a receiving end that supports multi-receiving wireless charging.

The charging management unit saves information of each transmitting coil that is 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 foreign objects.

If it is confirmed that it is a foreign object, the information stored in the charging management unit is crosstalk to the sending end. The transmitting end removes the information from the receiving end, and sends the corresponding transmitting coil as a low-power signal of the presence of a foreign object. After the foreign object is removed, the transmitting coil resumes normal low-power signal transmission. At the same time, after the wireless power-on communication link of the master device is restored, the transmitting end notifies the wireless charging receiving end of the master device to disconnect the wireless communication connection of the receiving end to be charged.

When it is not a foreign object, the wireless charging of the main device and the receiving end to be charged perform information interaction confirmation to confirm whether the information in the charging management unit is consistent with the receiving end to be charged.

If the charging management unit does not have the device information, then there are two cases: one is that the information of the receiving end has not been uploaded to the charging management unit of the sending end; the other is that the receiving end does not support multiple receiving ends for wireless charging Function, its information cannot be uploaded to the charging management unit of the sending end.

In the first case, at this time, the sending end uses the receiving end as the next device to be confirmed, and records the number of confirmations of the same position of the device at the same time. For example, it can be set to two confirmations. When the number of confirmations is exceeded, the device defaults to not supporting multi-receiver wireless charging, and processes according to the scenario where multi-receiver wireless charging is not supported.

If the information of the sending end and the receiving end is confirmed correctly, the charging management unit of the sending end will require the sending coil to send some basic sending power, such as 5W, to estimate the transmission efficiency of this wireless charging configuration, in order to evaluate the subsequent Transmit power and choose higher efficiency transmitting coil.

When the receiving end spans a combination of multiple transmission coils, after the information is confirmed, there will be the same receiving end across the transmitting coils. The one with the higher transmission efficiency is selected as the transmission coil, and the other transmitting coils It is in the normal state to send a low-power signal and prompts that the device is wirelessly charging across the coil. After all the information about the wireless charging receiving end is confirmed, the wireless charging communication link is returned to the main wireless charging, and the multiple receiving ends start wireless charging.

In actual application, for the main wireless charging receiving end that is performing wireless charging, there is a working flowchart when a new receiving end enters wireless charging, as shown in FIG. 6. When the wireless communication function of the main wireless charging receiving end is added by the slave device, it indicates that there is a potential receiving end to perform wireless charging. When the slave device uploads its information to the master device, the master device uploads the information to the sending end through the wireless charging communication link. Then, after receiving the information confirmation request from the sender, the master device maintains the current wireless charging status, suspends wireless charging, releases the wireless charging communication link, and sets the slave device information confirmation time based on user experience or experimental data, such as 1 second. If it times out, the slave device information is removed, the wireless communication connection of the receiving end is disconnected, the wireless charging communication link is restored, the wireless charging is continued, and a new receiving end is detected again. If there is no timeout, the sender and the slave device are considered to have successfully established a temporary wireless charging communication link for information confirmation. The wireless charging communication link is resumed, and the information confirmation result is obtained from the transmitting end. If the information verification fails, it means that the slave device is not within the wireless charging range of the sending end, the information of the slave device is removed, 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-receiver wireless charging.

As shown in FIG. 7, it is a working flowchart when the receiving end enters wireless charging. When the receiving coil of the receiving end to be charged enters the wireless charging range, that is, after induction of electric energy, it indicates that there may be a magnetic field generated by the wireless charging transmitting end around. The receiver sets its wireless communication function to the role of slave device in order to find the master device. When the receiving end does not detect the main device, there are two cases: 1. There is no other receiving end currently charging in the wireless charging environment; 2. The transmitting end is suitable for a receiving end that does not support multi-receiving wireless charging. Yes, wireless charging is in progress.

In either case, after the receiving end has not found the master device, it will first try to adapt to the transmitting end. If the adaptation fails, it means that the changing magnetic field cannot establish wireless charging with the receiving end, then it may be the second case.

At this time, the receiving end will repeatedly perform adaptation with the transmitting end until the adaptation is successful. If the receiving end and the transmitting end are successfully adapted, which is the first case, then the receiving end establishes a wireless charging communication link with the transmitting end.

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

If the sender supports the multi-receiver wireless charging function, the wireless charging established this time is considered as the main wireless charging, and the receiver sets its wireless communication function to the role of the master device, waiting for other receivers to join for wireless charging. If the sender does not support the multi-receiver wireless charging function, the receiver will turn off its wireless communication function. After the setting of the communication function is completed, the receiving end and the transmitting end start wireless charging.

After the receiving end searches for the master device, it indicates that the receiving end may enter an environment that can support multi-receiving wireless charging. The receiving end transmits the relevant information to the master device through the wireless communication channel, and the master device passes the wireless charging communication link to the transmitting end, and then waits for the information confirmation with the transmitting end.

If the sending end does not wait for the information confirmation request from the receiving end within a certain period of time, the adaptation is considered to have failed. The waiting time can be determined according to the user experience and the rotation time at the sending end, and can be set to 1 second, for example. After the adaptation fails, it prompts that the adaptation failed, and continues to repeat the next adaptation. When the receiving end and the transmitting end establish a temporary wireless charging communication link within a certain period of time, the receiving end and the transmitting end perform information interaction confirmation. If the information interaction confirmation fails, it is likely that there is crosstalk in the wireless communication function. The receiving end releases the wireless charging communication link, prompting an adaptation failure; disconnects the wireless communication function, and searches for another master device again. If the information is confirmed successfully, the receiving end can perform wireless charging function. The receiver releases the wireless charging communication link. After all the receivers to be confirmed have confirmed the information, the receiver turns on wireless charging.

In this embodiment, the wireless charging of the device to be charged is not always in a charging state. When the following three situations occur at the receiving end, the charging of the receiving end may need to be adjusted. The three cases include: 1. Transmission during the charging process The efficiency is less than a certain value, such as 70%; 2. The receiving end requests charging to end, such as when charging is fully charged; 3. The receiving end information interaction is interrupted, such as being removed.

When these three situations occur, the sending end considers that the receiving end quits the work, and then operates according to the quitting work flow, as shown in FIG. 8.

If it is removed as the receiving end of the master device, the transmitting coil returns to the normal low-power signal transmission, and the transmitting end selects one of the remaining wireless charging profiles to establish a new wireless charging and wireless charging communication link of the master device.

The general selection method can make a group with higher charging efficiency to establish wireless charging of the main device.

When the receiving end that is not the master device is removed, the device information is removed from the charging management unit, and the transmitting coil returns to the normal low-power signal transmission. After completing these operations, the remaining wireless charging combinations continue to perform wireless charging until all wireless charging ends.

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 shown in FIG. 9. The charging management unit determines whether the temperature exceeds the standard. If the temperature exceeds the standard, the power obtained by the charging management unit from the device estimates the current charging efficiency. According to a 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 object between the coils, which consumes power and heats up the temperature, so it indicates that the efficiency is too low and stop charging. If the efficiency is within the preset power efficiency relationship, this indicates that the coil's own power loss is high and the transmission power needs to be reduced. Therefore, the transmission power is selected to be reduced. At this time, the power reduction method 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, it prompts the user that the transmission power is too low and stops charging. If there is still room for power adjustment, the charging management unit will inform the receiving end to adjust the transmission power, and the receiving end will also monitor the wireless charging process based on the adjusted power.

In this embodiment, not only the sending end monitors the charging temperature, but the receiving end can monitor at the same time. The monitoring process is shown in Figure 10. The charging management unit on the receiving end detects the temperature of the receiving coil. , Pass the received wireless charging power parameters to the sending end, such as voltage and current. The transmitting end calculates the related efficiency according to the received wireless charging power parameter 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 transmission current is adjusted by default. After the power is adjusted, wait for a period of time, such as 10 seconds, and re-test the temperature. The temperature rise due to heat generation is a gradual process. Even if the power is adjusted, it takes a period of time to dissipate the heat, the temperature will drop, and the effect of power adjustment will be reflected after the temperature value is detected. If the efficiency is too low, the receiving end indicates that the efficiency is too low, and informs the transmitting end that the receiving end stops charging.

In this embodiment, when charging of a slave device is completed or disconnected, the work flow of the master device is shown in FIG. 11. When the slave device finishes 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 finishes setting, 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. It may be that the slave device is faulty or has left the current wireless charging range. The master device notifies the sender of the status and then removes the information of the slave device.

In this embodiment, when wireless receiving is suddenly interrupted as the receiving end of the slave device, the processing steps are shown in FIG. 12. First, it shows that a changing magnetic field cannot be induced, so that inductive power cannot be generated. This is because the distance of wireless communication is generally much longer than the electromagnetic induction distance of charging. Therefore, the first reaction from the device when it leaves the effective range of wireless charging is that it cannot sense electric energy. When the receiving end cannot sense power, there are two cases: one is that the slave device is removed from 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 slave device turns off the wireless communication function and ends the wireless charging work.

When the power is sensed and the communication with the host device continues to be maintained, it means that the wireless charging works normally and therefore continues to be maintained. 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 sender. If the sender establishes a new wireless charging communication link with the slave device at this time, after the slave device establishes a wireless charging communication link with the sender, the receiver will then become the master device and switch its wireless communication function to Master device role. Subsequently, the receiving end will receive connection requests for wireless communication from other slave devices and establish a new wireless charging group. The slave device does not receive a request for establishing a wireless charging communication link within a certain period of time. After that time, the slave device tries to find a new master device in order to join a new wireless charging group for wireless charging.

Embodiment 5:

This embodiment provides a wireless charging system. As shown in FIG. 13, the system includes a processor 101, a memory 102, and a communication bus 103. The communication bus 103 is used to implement a communication connection between the processor 101 and the memory 102. Processing The charger 101 is configured to execute one or more programs stored in the memory 102 to implement the following steps: detecting whether the second device to be charged is located within a wireless charging range of the charging device; the charging device includes at least one transmitter having a separate working capability A coil; if the second device to be charged is within a wireless charging range, establishing a wireless charging communication link between the second device to be charged and the charging device, and setting the device of the second device to be charged Status, the device status includes the status of the master device and the status of the slave device; selecting a sending coil in the charging device that meets the charging parameters of the second device to be charged; controlling the sending coil pair through the established wireless charging communication link The second device to be charged is charged.

In an actual application, when the processor 101 executes a program to detect whether the second device to be charged is within a wireless charging range, it specifically detects whether the magnetic flux of each sending coil has changed; if the magnetic flux has changed, it is determined The second device to be charged has entered the wireless charging range of the charging device; if the magnetic flux has not changed, the second device to be charged is not within the wireless charging range of the charging device.

If the setting the device state of the second to-be-charged device is a slave state, after selecting the sending coil in the charging device that meets the charging parameters of the second to-be-charged device, the method further includes: Whether there is a first to-be-charged device in the wireless charging range whose status is a master device; if the first to-be-charged device exists, establishing a wireless connection between the second to-be-charged device and the first to-be-charged device Communication connection; the second to-be-charged device reports its own charging parameters to the charging device through the first to-be-charged device; if the first to-be-charged device does not exist, performing establishment of the second to-be-charged device A wireless charging communication link between the charging device and the charging device, and switching the state of the second to-be-charged device from the slave device state to the master device state.

In this embodiment, after the charging parameter of the second to-be-charged device is reported to the charging device through the first to-be-charged device, the method further includes: determining whether the management unit exists in the second Identity verification information of the device to be charged; if it exists, the wireless charging communication link between the charging device and the first device to be charged is disconnected, and wireless charging of the charging device and the second device to be charged is established Communication link.

In another embodiment, after step S104, the method further includes: obtaining the performance parameter of the second to-be-charged device through the wireless charging communication link; and determining whether the second to-be-charged device supports according to the performance parameter. Multi-device charging; if supported, query whether there is a first to-be-charged device with a status of master device within the wireless charging range; and perform charging control on the second to-be-charged device according to the result of the query.

If not, keep the wireless charging connection of the second to-be-charged device and only charge it; or disconnect the wireless charging connection of the second to-be-charged device and set its charging priority to the lowest priority and wait After the charging device finishes charging the to-be-charged device that supports multi-device charging, it starts charging the device that does not support multi-device charging.

In this embodiment, the performing charging control on the second to-be-charged device according to a query result includes: if the first to-be-charged device exists within the wireless charging range, establishing the second to-be-charged device Wireless communication connection with the first to-be-charged device; the second to-be-charged device reports its real-time charging data to the charging device through the first to-be-charged device; The first device to be charged exists, and the second device to be charged is set to a master device state.

Correspondingly, an embodiment of the present invention further provides a computer-readable storage medium. The computer-readable storage medium includes any computer-readable storage medium for storing information such as computer-readable instructions, data structures, computer program modules, or other data. Volatile or non-volatile, removable or non-removable media implemented in a method or technology. Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory, 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 box, magnetic tape, disk storage or other magnetic storage devices, Or any other medium that can be used to store desired information and can be accessed by a computer.

The computer-readable storage medium in this embodiment may be used to store one or more computer programs, and the stored one or more computer programs may be executed by a processor to implement at least one of the wireless charging methods in the first embodiment. step.

This embodiment also provides a computer program, which can be distributed on a computer-readable medium and executed by a computable device to implement at least one step of the wireless charging method in the first embodiment, and in some cases In the case, at least one step shown or described may be performed in an order different from that described in the above embodiments.

This embodiment also provides a computer program product, including a computer-readable device. The computer-readable device stores a computer program as shown above. In this embodiment, the computer-readable device may include a computer-readable device as shown above. Read storage media.

In summary, the wireless charging method, the system and the computer-readable storage medium provided by the embodiments of the present invention detect whether the second device to be charged is located within the wireless charging range of the charging device, and if so, establish a connection between the two. Wireless charging communication connection, and selecting a sending coil from the charging device that satisfies the charging parameters of the second to-be-charged device to wirelessly charge the second to-be-charged device, thereby realizing the work of each sending coil individually in one charging device Control, so that one charging device can perform wireless charging function on multiple devices to be charged at the same time, reduce the cost of wireless charging function products, improve user experience, and have high safety.

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 devices disclosed in the above methods can be implemented as software (can be implemented by computer program code executable by a computing device ), Firmware, hardware, and appropriate combinations. In a hardware implementation, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components execute cooperatively. Some or all physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit .

In addition, it is well known to those of ordinary skill in the art that a communication medium typically contains computer-readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium. Therefore, the present invention is not limited to any specific combination of hardware and software.

The above content is a further detailed description of the embodiments of the present invention in combination with specific implementation manners, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without deviating from the concept of the present invention, several simple deductions or replacements can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims (17)

1. A wireless charging method, wherein the method includes:

   Detecting whether the second to-be-charged device is located within a wireless charging range of the charging device; the charging device includes at least one transmitting coil having a separate working capability;

   If the second device to be charged is within a wireless charging range, establishing a wireless charging communication link between the second device to be charged and the charging device, and setting a device state of the second device to be charged, The device status includes a master device status and a slave device status;

   Selecting a sending coil in the charging device that meets the charging parameters of the second device to be charged;

   And controlling the transmitting coil to charge the second to-be-charged device through the established wireless charging communication link.
2. The wireless charging method according to claim 1, wherein, if the device state of the second to-be-charged device is set to the slave state, satisfying the charging of the second to-be-charged device in selecting the charging device After sending the parameters of the coil, it also includes:

   Querying whether there is a first to-be-charged device whose status is the master device within the wireless charging range;

   If the first to-be-charged device exists, establishing a wireless communication connection between the second to-be-charged device and the first to-be-charged device; the second to-be-charged device passes its own charging parameter through the The first device to be charged is reported to the charging device;

   If the first to-be-charged device does not exist, establishing a wireless charging communication link between the second to-be-charged device and the charging device, and changing the state of the second to-be-charged device from the slave The device status switches to the master device status.
3. The wireless charging method according to claim 2, wherein after reporting the charging parameter of the second to-be-charged device to the charging device through the first to-be-charged device, further comprising:

   Determining whether there is identity verification information in the second unit to be charged in the management unit;

   If it exists, the wireless charging communication link between the charging device and the first to-be-charged device is disconnected, and the wireless charging communication link between the charging device and the second to-be-charged device is established;

   If it does not exist, mark the second to-be-charged device and retain it 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, further comprising:

   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 to-be-charged device in a state of being a master device within the wireless charging range;

   Perform charging control on the second to-be-charged device according to a query result.
5. The wireless charging method according to claim 4, wherein the performing charging control on the second device to be charged according to a result of the query comprises:

   If the first to-be-charged device exists within the wireless charging range, a wireless communication connection is established between the second to-be-charged device and the first to-be-charged device; The charging data is reported to the charging device through the first device to be charged;

   If the first to-be-charged device does not exist within the wireless charging range, the second to-be-charged device is set to a master device state.
6. The wireless charging method according to any one of claims 1-5, wherein after determining that the second device to be charged is within a wireless charging range, further comprising:

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

   If yes, determine a transmitting coil corresponding to the position of the foreign object, and control the transmitting coil to continuously send a low-power signal of the foreign object.
7. The wireless charging method according to claim 6, wherein controlling the sending coil to charge the second device to be charged through the established wireless charging communication link comprises:

   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;

   A final transmission power for charging the device to be charged by the transmitting coil is determined according to an evaluation result.
8. The wireless charging method according to any one of claims 1 to 5, after controlling the sending coil to charge the second to-be-charged device through the established wireless charging communication link, further comprising:

   Detecting whether all the devices to be charged located within the wireless charging range of the charging device need to be adjusted for charging;

   A corresponding charging adjustment strategy is determined according to the detection result, and the charging adjustment control is performed on the device to be charged.
9. The wireless charging method according to claim 8, wherein the detecting whether all the devices to be charged located within a wireless charging range of the charging device need to be adjusted for charging comprises:

   Detecting a temperature value generated between the charging device and each device to be charged; determining whether the temperature value is greater than a preset temperature value; if so, reducing the transmission power of the transmitting coil or disconnecting the transmitting coil from the The device to be charged is charged, and the transmitting coil returns to a normal low-power signal transmission;

   Alternatively, determining whether the device to be charged meets a condition for disconnecting the charging, the condition includes receiving a request to disconnect the charging and / or the transmission efficiency of the charging is less than a preset value; if it is satisfied, disconnecting the transmitting coil pair The device to be charged is charged, and the transmission coil returns to a normal low-power signal transmission.
10. The wireless charging method according to claim 9, wherein if the state of the to-be-charged device that is disconnected from charging is the state of the main device, after disconnecting the transmitting coil to charge the to-be-charged device, further comprising: : Select the state of one of the remaining to-be-charged devices in the charging device to adjust to the state of the main device, and establish a wireless charging communication link between the two.
11. A wireless charging system, comprising: at least one second to-be-charged device and a charging device for supplying power to the second to-be-charged device, the charging device including at least one transmitting coil having an independent working capability;

    The charging device detects whether the second device to be charged is located within a wireless charging range of the charging device;

    If the second device to be charged is located within a 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 the second device to be charged Device status, the device status includes a master device status and a slave device status;

    Selecting, by the charging device, a transmission coil that satisfies a charging parameter of the second device to be charged;

    The charging device controls the transmitting coil to charge the second to-be-charged device through the established wireless charging communication link.
12. The wireless charging system according to claim 11, wherein when the charging device sets a device state of the second to-be-charged device to a slave state, the second to-be-charged device is further configured to query the Whether there is a first to-be-charged device in the wireless charging range whose status is the master device;

    If it exists, establish a wireless communication connection between the second to-be-charged device and the first to-be-charged device; report its own charging parameters to the charging device through the first to-be-charged device;

    If not, establish a wireless charging communication link between the second to-be-charged device and the charging device, and switch the state of the second to-be-charged device from the slave device state to the master device state.
13. The wireless charging system according to claim 12, wherein the charging device is further configured to determine whether the authentication information of the second to-be-charged device exists in the management unit; if it exists, the device will be disconnected. The wireless charging communication link between the charging device and the first to-be-charged device establishes a wireless charging communication link between the charging device and the second to-be-charged device; if it does not exist, the second to-be-charged device is Mark it and keep it until the next judgment.
14. The wireless charging system according to claim 11, wherein the charging device is further configured to obtain a performance parameter of the second device to be charged through the wireless charging communication link; and determine the second device according to the performance parameter. Whether the to-be-charged device supports multi-device charging; if so, query whether there is a first to-be-charged device with a status of master device within the wireless charging range; and perform charging control on the second to-be-charged device according to the query result.
15. The wireless charging system according to claim 14, wherein the charging device is configured to establish the second to-be-charged device and the first to-be-charged device when the first to-be-charged device exists within the wireless charging range. Wireless communication connection between charging devices; the second to-be-charged device reports its real-time charging data to the charging device through the first to-be-charged device; the first to-be-charged device does not exist within the wireless charging range When charging a device, the second device to be charged is set to a master device state.
16. A wireless charging system, including a processor (101), a memory (102), and a communication bus (103);

    The communication bus (103) is configured to implement a communication connection between the processor (101) and the memory (102);

    The processor (101) is configured 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 stores one or more computer programs, and the one or more computer programs are executable by one or more processors (101) to implement the claims. The steps of the wireless communication method according to any one of 1 to 10.

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