Charging method, charging device, electronic equipment and storage medium

Abstract

The invention relates to a charging method, a charging device, electronic equipment and a storage medium. The charging method comprises the following steps: responding to a condition that to-be-charged equipment is placed on a charging base, and determining a target parameter corresponding to each scanning coil in a plurality of scanning coils contained in the charging base; and determining a target transmitting coil for power supply according to the target parameter and the corresponding relationship between the scanning coil and the transmitting coil. And establishing wireless connection between the target transmitting coil and a receiving coil in a to-be-charged device, and wirelessly charging the to-be-charged device. According to the invention, when the multi-coil wireless charging device is used for charging the to-be-charged equipment, only the transmitting coils in the multi-coil wireless charging device are aroused, and the transmitting coil for power transmission is determined according to the target parameter corresponding to each transmitting coil, so that the matching efficiency of the transmitting coils and the receiving coils is improved, other sensors are not introduced, and the cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless charging, and in particular, to a charging method, a charging device, an electronic device, and a storage medium. Background Art

[0002] To reduce the alignment requirements for the user to place the terminal on the wireless charger, a wireless charging device generally sets multiple transmitting coils on the wireless charging seat, so that any one of the transmitting coils can establish a coupling relationship with the receiving coil of the mobile phone for charging. When the terminal to be charged is placed on the wireless charging base, it is necessary to match the transmitting coil with the receiving coil, and select the transmitting coil with the best matching degree among multiple transmitting coils for power supply.

[0003] In the related art, multiple transmitting coils provided on the charging seat of the wireless charger adopt a polling mechanism to select the optimal transmitting coil, that is, multiple power supply transmitting coils successively establish a wireless connection with the receiving coil in the terminal based on the wireless charging protocol (Qi protocol) and perform energy transmission, determine the induced voltage corresponding to each transmitting coil, and select the transmitting coil with the largest maximum induced voltage as the power supply coil for charging. The detection process is long, and it takes a long time to establish a matching relationship between the transmitting coil and the receiving coil. In the related art, there is also a means of setting an additional sensor to detect the position of the receiving coil, which will increase the cost of the wireless charging device. Summary of the Invention

[0004] To overcome the problems existing in the related art, the present disclosure provides a charging method, a charging device, an electronic device, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a charging method is provided, including: in response to a device to be charged being placed on a charging base, determining target parameters corresponding to each of a plurality of scanning coils included in the charging base, where the scanning coils have a corresponding relationship with transmitting coils for power supply in a power supply device, and the target parameters corresponding to the scanning coils characterize the charging efficiency of the transmitting coils corresponding thereto; determining a target transmitting coil for power supply according to the target parameters and the corresponding relationship between the scanning coils and the transmitting coils; establishing a wireless connection between the target transmitting coil and a receiving coil in the device to be charged, and performing wireless charging on the device to be charged.

[0006] In an implementation manner, the determining target parameters corresponding to each of a plurality of scanning coils included in the charging base includes: respectively applying an excitation current to the plurality of scanning coils, and determining a time interval between when the current peak value of the excitation current in each scanning coil decays from a first current value to a second current value; determining the time interval between when the current peak value in each scanning coil decays from the first current value to the second current value as the target parameter corresponding to each scanning coil, where the first current value is greater than the second current value.

[0007] In one implementation, determining a target transmitting coil for power supply according to the target parameter and the corresponding relationship between the scanning coil and the transmitting coil includes: determining target parameters with values less than a preset threshold among multiple target parameters as valid target parameters, and there is an overlap in the spatial position between the transmitting coil corresponding to the valid target parameter and the device to be charged; determining the target transmitting coil for power supply according to the valid target parameter and the corresponding relationship between the scanning coil and the transmitting coil.

[0008] In one implementation, the corresponding relationship between the scanning coil and the transmitting coil includes: the scanning coil and the transmitting coil are the same coil; or the scanning coil and the transmitting coil are different coils, a group of scanning coils corresponds to a single transmitting coil, a group of scanning coils includes a preset number of scanning coils, and the single transmitting coil corresponding to the group of scanning coils is surrounded by the preset number of scanning coils.

[0009] In one implementation, determining the target transmitting coil for power supply according to the valid target parameter and the corresponding relationship between the scanning coil and the transmitting coil includes: in response to the scanning coil and the transmitting coil being the same coil, determining the scanning coil corresponding to the maximum target parameter among the valid target parameters as the target transmitting coil; in response to the scanning coil and the transmitting coil being different coils, determining the target transmitting coil according to the multiple scanning coils corresponding to the valid target parameter.

[0010] In one implementation, determining the target transmitting coil according to the multiple scanning coils corresponding to the valid target parameter includes: determining a target group of scanning coils according to the multiple scanning coils corresponding to the valid target parameter and the target parameter; determining the transmitting coil corresponding to the target group of scanning coils as the target transmitting coil.

[0011] In one implementation, determining a target group of scanning coils according to the multiple scanning coils corresponding to the valid target parameter and the target parameter includes: determining adjacent scanning coils among the multiple scanning coils corresponding to the valid target parameter, the adjacent scanning coils including a pair of adjacent scanning coils or multiple pairs of adjacent scanning coils, and each pair of adjacent scanning coils includes laterally adjacent scanning coils or longitudinally adjacent scanning coils; determining multiple groups of scanning coils corresponding to the adjacent scanning coils, where multiple groups of scanning coils correspond to the same pair of adjacent scanning coils; determining the target group of scanning coils among the multiple groups of scanning coils according to the average value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, and the average value of the target parameters is the average value of the target parameters corresponding to a preset number of scanning coils in the same group of scanning coils.

[0012] In one implementation, determining the target group of scanning coils from the mean target parameters corresponding to each group of scanning coils in multiple groups of scanning coils includes: determining the mean target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, and determining the group of scanning coils with the maximum mean target parameter as the target group of scanning coils in the multiple groups of scanning coils.

[0013] According to a second aspect of the embodiments of the present disclosure, a charging device is provided, including: a scanning coil; a transmitting coil; a processor, which, in response to a device to be charged being placed on a charging base, determines the target parameters corresponding to each scanning coil in a plurality of scanning coils included in the charging base, determines a target transmitting coil for power supply according to the corresponding relationship between the scanning coil and the transmitting coil and the target parameters, establishes a wireless connection between the target transmitting coil and a receiving coil in the device to be charged, and performs wireless charging.

[0014] In one implementation, there is a corresponding relationship between the scanning coil and the transmitting coil, one group of scanning coils corresponds to a single transmitting coil, one group of scanning coils includes a preset number of scanning coils, and the preset number of scanning coils surrounds the single transmitting coil corresponding to this group of scanning coils.

[0015] In one implementation, the processor determines the target parameters corresponding to each scanning coil in a plurality of scanning coils included in the charging base in the following manner: applying an excitation current to each of the plurality of scanning coils respectively, and determining the time interval between when the current peak value of the excitation current in each scanning coil decays from a first current value to a second current value; determining the time interval between when the current peak value in each scanning coil decays from the first current value to the second current value as the target parameter corresponding to each scanning coil, where the first current value is greater than the second current value.

[0016] In one implementation, the processor determines the target transmitting coil for power supply according to the corresponding relationship between the scanning coil and the transmitting coil and the target parameters in the following manner: determining the target parameters with values less than a preset threshold among the target parameters as valid target parameters, and there is an overlap in the spatial position between the transmitting coil corresponding to the valid target parameter and the device to be charged; determining the target transmitting coil according to the plurality of scanning coils corresponding to the valid target parameters.

[0017] In one implementation, the processor determines the target transmitting coil according to the plurality of scanning coils corresponding to the valid target parameters in the following manner, including: determining the target transmitting coil according to the plurality of scanning coils corresponding to the valid target parameters.

[0018] In one implementation, the processor determines the target transmitting coil according to multiple scanning coils corresponding to the effective target parameters in the following manner: determining target group scanning coils according to the multiple scanning coils corresponding to the effective target parameters and the target parameters; and determining the transmitting coil corresponding to the target group scanning coils as the target transmitting coil.

[0019] In one implementation, the processor determines target group scanning coils according to the multiple scanning coils corresponding to the effective target parameters and the target parameters in the following manner: determining adjacent scanning coils among the multiple scanning coils corresponding to the effective target parameters, where the adjacent scanning coils include a pair of adjacent scanning coils or multiple pairs of adjacent scanning coils, and each pair of adjacent scanning coils includes laterally adjacent scanning coils or longitudinally adjacent scanning coils; determining multiple groups of scanning coils corresponding to the adjacent scanning coils, where multiple groups of scanning coils correspond to the same pair of adjacent scanning coils; and determining the target group scanning coils among the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, where the mean value of the target parameters is the mean value of the target parameters corresponding to a preset number of scanning coils in the same group of scanning coils.

[0020] In one implementation, the processor determines the target group scanning coils among the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils in the following manner: determining the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, and determining the group of scanning coils corresponding to the maximum mean value of the target parameters as the target group scanning coils among the multiple groups of scanning coils.

[0021] According to a third aspect of the embodiments of the present disclosure, a charging device is provided, including: a determining unit configured to determine, in response to a device to be charged being placed on a charging base, a target parameter corresponding to each of multiple scanning coils included in the charging base, where there is a corresponding relationship between the scanning coils and a transmitting coil for power supply in a power supply device, and the target parameter corresponding to the scanning coil characterizes the charging efficiency of the transmitting coil corresponding thereto; and a processing unit configured to determine a target transmitting coil for power supply according to the target parameter and the corresponding relationship between the scanning coil and the transmitting coil, establish a wireless connection between the target transmitting coil and a receiving coil in the device to be charged, and perform wireless charging on the device to be charged.

[0022] In one implementation, the determining unit determines the target parameter corresponding to each of the multiple scanning coils included in the charging base in the following manner: applying excitation currents to the multiple scanning coils respectively, and determining the time interval between when the current peak value of the excitation current in each scanning coil decays from a first current value to a second current value; determining the time interval between when the current peak value in each scanning coil decays from the first current value to the second current value as the target parameter corresponding to each scanning coil, where the first current value is greater than the second current value.

[0023] In one implementation, the processing unit determines the target transmitting coil for power supply in the following manner according to the target parameter and the corresponding relationship between the scanning coil and the transmitting coil: determining the target parameters with values less than a preset threshold among the multiple target parameters as valid target parameters, where the transmitting coil corresponding to the valid target parameter overlaps with the device to be charged in terms of spatial position; determining the target transmitting coil for power supply according to the valid target parameter and the corresponding relationship between the scanning coil and the transmitting coil.

[0024] In one implementation, the corresponding relationship between the scanning coil and the transmitting coil includes: the scanning coil and the transmitting coil are the same coil; or the scanning coil and the transmitting coil are different coils, a group of scanning coils corresponds to a single transmitting coil, a group of scanning coils includes a preset number of scanning coils, and the preset number of scanning coils surrounds the single transmitting coil corresponding to this group of scanning coils.

[0025] In one implementation, the processing unit determines the target group of scanning coils according to the multiple scanning coils corresponding to the valid target parameter and the target parameter in the following manner: in response to the scanning coil and the transmitting coil being the same coil, determining the scanning coil corresponding to the maximum target parameter among the valid target parameters as the target transmitting coil; in response to the scanning coil and the transmitting coil being different coils, determining the target transmitting coil according to the multiple scanning coils corresponding to the valid target parameter.

[0026] In one implementation, the processing unit determines the target transmitting coil according to the multiple scanning coils corresponding to the valid target parameter in the following manner: determining the target group of scanning coils according to the multiple scanning coils corresponding to the valid target parameter and the target parameter; determining the transmitting coil corresponding to the target group of scanning coils as the target transmitting coil.

[0027] In one implementation, the processing unit determines the target group of scanning coils according to the valid target parameters and the multiple scanning coils corresponding to the valid target parameters in the following manner: determining adjacent scanning coils among the multiple scanning coils corresponding to the valid target parameters, where the adjacent scanning coils include a pair of adjacent scanning coils or multiple pairs of adjacent scanning coils, and each pair of adjacent scanning coils includes scanning coils adjacent in the horizontal direction or scanning coils adjacent in the vertical direction; determining multiple groups of scanning coils corresponding to the adjacent scanning coils, where multiple groups of scanning coils correspond to the same pair of adjacent scanning coils; and determining the target group of scanning coils among the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, where the mean value of the target parameters is the mean value of the target parameters corresponding to a preset number of scanning coils in the same group of scanning coils.

[0028] In one implementation, the determining the target group of scanning coils among the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils includes: determining the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, and determining the group of scanning coils corresponding to the maximum mean value of the target parameters as the target group of scanning coils among the multiple groups of scanning coils.

[0029] According to a fourth aspect of the embodiments of the present disclosure, there is provided an electronic device, including: a processor; and a memory for storing processor-executable instructions; wherein the processor is configured to execute the charging method described in the first aspect or any one of the implementations of the first aspect.

[0030] According to a fifth aspect of the embodiments of the present disclosure, there is provided a storage medium storing instructions that, when executed by a processor, enable the processor to execute the charging method described in the first aspect or any one of the implementations of the first aspect.

[0031] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: When the device to be charged is placed on the charging base, the target parameters corresponding to each scanning coil in the charging base are determined. According to the target parameters and the corresponding relationship between the scanning coil and the transmitting coil, the target transmitting coil for power supply is determined, and then the target transmitting coil establishes a wireless connection with the receiving coil in the device to be charged and charges the device to be charged. Through the present disclosure, when using a multi-coil wireless charging device to charge a device to be charged, only the transmitting coils in the multi-coil wireless charging device are activated, and the transmitting coil for power transmission is determined according to the target parameters corresponding to each transmitting coil, improving the matching efficiency between the transmitting coil and the receiving coil, and not introducing other sensors, thereby reducing costs.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Brief Description of the Drawings

[0033] The drawings herein are incorporated into and form a part of the specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0034] Figure 1 It is a schematic diagram showing a terminal being charged using a multi - coil wireless charging device according to an exemplary embodiment.

[0035] Figure 2 It is a flowchart of a charging method according to an exemplary embodiment.

[0036] Figure 3 It is a schematic diagram of a wireless charging method according to an exemplary embodiment of the present disclosure.

[0037] Figure 4 It is a flowchart of a wireless charging method according to an exemplary embodiment of the present disclosure.

[0038] Figure 5 It is a flowchart of a method for determining multiple target parameters according to an exemplary embodiment.

[0039] Figure 6 It is a flowchart of a method for determining a target transmitting coil for power supply according to an exemplary embodiment.

[0040] Figure 7 It is a schematic waveform diagram showing the decay of the excitation current in a transmitting coil according to an exemplary embodiment of the present disclosure.

[0041] Figure 8 It is a schematic waveform diagram showing the decay of the excitation current in a transmitting coil according to another exemplary embodiment of the present disclosure.

[0042] Figure 9A It is a schematic diagram of the coil layout in a wireless charging device according to an exemplary embodiment of the present disclosure.

[0043] Figure 9B It is a schematic diagram of the coil layout in a wireless charging device according to another exemplary embodiment of the present disclosure.

[0044] Figure 10 It is a schematic diagram of the coil layout in a wireless charging device according to another exemplary embodiment of the present disclosure.

[0045] Figure 11 It is a flowchart of a method for determining a target transmitting coil for power supply according to another exemplary embodiment.

[0046] Figure 12A andFigure 12B It is a schematic diagram showing a method of charging a terminal using a wireless charging device with multiple coils according to an exemplary embodiment of the present disclosure.

[0047] Figure 13 It is a flowchart of a method for determining a target transmitting coil based on multiple scanning coils corresponding to effective target parameters according to an exemplary embodiment.

[0048] Figure 14 It is a flowchart of a method for determining a target group of scanning coils according to an exemplary embodiment.

[0049] Figure 15 It is a flowchart of a method for determining a target group of scanning coils among multiple groups of scanning coils according to an exemplary embodiment.

[0050] Figure 16A and Figure 16B It is a schematic diagram showing a method of charging a terminal using a wireless charging device with multiple coils according to another exemplary embodiment of the present disclosure.

[0051] Figure 17 It is a schematic diagram showing a method of charging a terminal using a wireless charging device with multiple coils according to another exemplary embodiment of the present disclosure.

[0052] Figure 18 It is a block diagram of a charging device according to an exemplary embodiment.

[0053] Figure 19 It is a block diagram of a charging device according to an exemplary embodiment.

[0054] Figure 20 It is a block diagram of a device for charging according to an exemplary embodiment. Detailed implementation manners

[0055] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure.

[0056] When the wireless charging method provided by the embodiments of the present disclosure is applied to wirelessly charge a device to be charged, it is applied to a scenario where a matching relationship is established between a transmitting coil in a power supply device and a receiving coil in the device to be charged.

[0057] Devices that need to be charged, such as terminals, play an important role in people's lives and work. Based on the different usage requirements of users for devices that need to be charged, such as terminals, the demand for charging scenarios for various terminal devices that need to be charged has increased. Based on the above charging requirements for electrical devices, as a supplement to wired charging, wireless charging has emerged. Currently, more and more electrical devices are equipped with this function. For example, flagship models of various mobile phone manufacturers are all equipped with wireless charging functions. Wireless charging is based on the principle of electromagnetic induction and can achieve the charging function without the use of connecting cables.

[0058] Wireless charging of electrical devices is based on the principle of electromagnetic induction and is achieved through a mutually matching transmitting coil and a power supply coil. Among them, the transmitting coil is located in the power supply device (inside the wireless charging device), and the receiving coil is located in the device to be charged (i.e., the electrical device). The device to be charged only has a single receiving coil, and the receiving coil and the transmitting coil need to be aligned to enable wireless charging at high power. To reduce the alignment requirements for the user to place the device to be charged on the wireless charging device, it can be placed casually to enter the wireless charging state without deliberately aligning the coils. There are multi-coil wireless charging stands on the market. By increasing the number of transmitting coils, any one of the multiple transmitting coils can establish a coupling relationship with the receiving coil of the device to be charged, and then charging can be carried out.

[0059] In related technologies, a polling mechanism is used to determine a single transmitting coil for power supply among the multiple transmitting coils of a multi-coil wireless charging stand, such as Figure 1As shown in the schematic diagram of charging a terminal using a multi-coil wireless charging device, after the device to be charged is placed on the wireless charging stand, the charging stand will confirm the position of the device to be charged through a certain strategy, and then allocate the coil with the best coupling degree for it, thereby improving the charging efficiency and speed. The coil selection strategy in the related art is as follows: when the device to be charged is placed on the wireless charging stand, the transmitting coil on the wireless charging stand and the receiving coil in the electrical device are simultaneously activated. For each transmitting coil on the wireless charging stand, it is respectively made to establish wireless communication with the receiving coil in the electrical device based on the wireless charging protocol (Qi protocol) and perform power transmission to determine the corresponding induced voltage. Then, compare the magnitudes of the induced voltages during the power transmission process of all the transmitting coils that can establish communication with the receiving coil, and select the transmitting coil corresponding to the maximum induced voltage as the preferred coil for power supply, so that the preferred coil and the receiving coil establish a matching relationship and perform wireless charging. In the above related art, all the coils in the wireless charging stand need to try to detect the device to be charged, and those transmitting coils that detect the device to be charged need to establish energy transmission with the receiving coil of the device to be charged. Overall, this process is a logic of continuous exploration, cyclic testing, and comparison decision-making, and it is impossible to directly select the target coil or reduce the number of retrieved target coils, resulting in a long time required to establish the matching relationship between the transmitting coil and the receiving coil, and the efficiency of the coil matching process is low.

[0060] In the related art, there are also means of using sensors for detection. That is, additional sensors (such as pressure sensors, proximity sensors) are set on the wireless charging stand, and the position of the receiving coil in the device to be charged is detected through the sensors, and the target transmitting coil corresponding to the position of the receiving coil is determined. The target transmitting coil and the receiving coil establish a matching relationship and perform wireless charging. However, the method of adding sensors will increase the overall volume of the wireless charging device and increase the design cost of the wireless charging device.

[0061] In view of this, the present disclosure proposes a charging method. During the screening process of the transmitting coil after the device to be charged is placed on the wireless charging stand, the target parameter corresponding to each scanning coil in the charging base is determined, and the target transmitting coil for power supply is determined according to the target parameter. Then, the target transmitting coil and the receiving coil in the device to be charged establish a wireless connection and charge the device to be charged. Through the present disclosure, when using a multi-coil wireless charging device to charge the device to be charged, only the scanning coils in the multi-coil wireless charging device are activated, and the transmitting coil for power transmission is determined according to the target parameter corresponding to each scanning coil, improving the matching efficiency between the transmitting coil and the receiving coil, and without introducing other sensors, reducing the cost.

[0062] Figure 2 is a flowchart of a charging method shown according to an exemplary embodiment. As Figure 2As shown, the method includes steps S101 to S103.

[0063] In step S101, in response to the device to be charged being placed on the charging base, determine the target parameter corresponding to each of the multiple scanning coils included in the charging base.

[0064] Among them, the multiple scanning coils correspond one-to-one with the multiple target parameters. There is a corresponding relationship between the scanning coils and the transmitting coil for power supply in the power supply device. The target parameter corresponding to the scanning coil characterizes the charging efficiency of the corresponding transmitting coil.

[0065] In step S102, determine the target transmitting coil for power supply according to the target parameter and the corresponding relationship between the scanning coil and the transmitting coil.

[0066] In step S103, establish a wireless connection between the target transmitting coil and the receiving coil in the device to be charged, and perform wireless charging on the device to be charged.

[0067] In the embodiment of the present disclosure, when the wireless charging device detects that the device to be charged is placed on the charging base, only the scanning coils on the charging base are awakened, all the scanning coils are synchronously enabled, and the target parameter corresponding to each scanning coil is obtained. There is a corresponding relationship between the scanning coils and the transmitting coils in the present disclosure. The target parameter corresponding to the scanning coil can reflect the charging efficiency of the corresponding transmitting coil during wireless charging. Therefore, by comparing multiple target parameters, the optimal transmitting coil among multiple transmitting coils can be selected as the coil for power supply, establish a matching relationship with the receiving coil in the device to be charged and start the subsequent wireless charging process. In summary, when using a multi-coil wireless charging device to charge a device to be charged, only the transmitting coils in the multi-coil wireless charging device are awakened, and the transmitting coil for power transmission is determined according to the target parameter corresponding to each transmitting coil, improving the matching efficiency between the transmitting coil and the receiving coil, and not introducing other sensors, reducing costs.

[0068] In the embodiment of the present disclosure, after determining the transmitting coil for power supply and establishing a matching relationship between the transmitting coil and the receiving coil in the device to be charged, the wireless charging device and the device to be charged perform a handshake based on the specifications of the wireless charging protocol, and sequentially complete the processes of broadcasting, identification, configuration, and power transmission to achieve wireless charging.

[0069] In the embodiment of the present disclosure, when the multi-coils obtain the target parameters, they can be executed in parallel or serial manner according to different hardware solutions.

[0070] In an exemplary embodiment of the present disclosure, a mobile phone (device to be charged) is wirelessly charged by a wireless charger (wireless charging device), as Figure 3 in the schematic diagram of the wireless charging method and Figure 4As shown in the flowchart of the wireless charging method, the handshake process based on the charging protocol between the wireless charger and the mobile phone is completed in the following manner to achieve wireless charging. Among them, the handshake process based on the charging protocol is as follows: The wireless charging device, as the transmitter (TX), initiates a broadcast (Digital Ping) to the device to be charged, which acts as the receiver (RX); in response to the received broadcast, the device to be charged sends the signal strength information (Signal Strength) of the received signal to the wireless charging device, and also sends the account information (Identification, ID) and configuration information (Configuration) to the wireless charging device; after receiving the strength information, account information, and configuration information, the wireless charging device establishes communication and starts energy transmission to supply power to the device to be charged; the device to be charged turns on the low dropout regulator (LDO). Among them, the wireless charging process is as follows: The transmitting coil L1 in the wireless charging device and the receiving coil L2 in the device to be charged transmit alternating current based on electromagnetic induction; the AC / DC converter in the device to be charged converts the alternating current into a standard direct current (Vrect); the low dropout regulator stabilizes the voltage of the standard direct current and transmits it to the voltage output terminal (Vout), and the voltage output terminal inputs the stabilized direct current to the subsequent battery load to supply power to the subsequent battery load.

[0071] In the embodiments of the present disclosure, the target parameter corresponding to the scanning coil can reflect the charging efficiency of the corresponding transmitting coil during wireless charging. The target parameter is associated with the inductance quality parameter (Q value) of the transmitting coil, and the target parameter corresponding to the scanning coil can be regarded as the inductance quality correlation parameter of the transmitting coil corresponding to the scanning coil. The scanning parameter reflects the attenuation rate of the alternating current in the scanning coil when wireless charging is not performed. The following embodiments of the present disclosure illustrate the method for determining the target parameter.

[0072] Figure 5 is a flowchart of a method for determining multiple target parameters shown according to an exemplary embodiment. As Figure 5 shown, the method includes steps S201 to S202.

[0073] In step S201, excitation currents are applied to multiple scanning coils respectively, and the time interval between the current peak of the excitation current in each scanning coil decaying from the first current value to the second current value is determined.

[0074] In step S202, the time interval between the current peak of the excitation current in each scanning coil decaying from the first current value to the second current value is determined as the target parameter corresponding to each scanning coil.

[0075] Among them, the first current value is greater than the second current value.

[0076] In the embodiments of the present disclosure, based on a fixed driving voltage and a fixed period, an excitation current is uniformly applied to each scanning coil in the wireless charging device. As Figure 6 shown in the waveform diagram of the decay of the excitation current in the transmitting coil. Determine the time interval between when the peak current value in each scanning coil decays from the first current value (th1) to the second current value (th2), and use this time interval as the target parameter. It can be understood that during the decay process of the excitation current in the scanning coil, the peak current value corresponding to each period may not correspond to the preset current value. For example, during the decay process of the excitation current in a certain scanning coil, the peak current values corresponding to multiple periods are 2.9, 2.5, 2.0, 1.4, 0.7... in sequence, while the preset first current value is 2.8 and the second current value is 1.0. In this case, two peak current values (such as 2.9 and 2.5) adjacent to the preset current value (such as the first current value 2.8) can be selected, and a point corresponding to the preset current value is determined on the curve between them as the "peak current value" corresponding to the preset current value.

[0077] In the embodiments of the present disclosure, the decay process of the excitation current on the coil is essentially a process of electrical energy dissipation. Various metal components on the device to be charged (such as the metal middle frame part, main board part, camera part, electronic components, etc.) of the device to be charged will accelerate the dissipation of electrical energy and affect the target parameter value. Therefore, there are differences in the target parameters obtained by the scanning coils corresponding to different position regions on the device to be charged. In the device to be charged of the present disclosure, a special material is provided in the area where the receiving coil is located, so that the target parameters obtained by the corresponding scanning coil are different from those of other scanning coils that have an overlapping relationship with the device to be charged, which is convenient for determining the target transmitting coil for power supply based on the target parameters in the subsequent process.

[0078] In the embodiments of the present disclosure, the decay process of the excitation current on the scanning coil is essentially a process of electrical energy dissipation, and various metal components on the device to be charged will accelerate the dissipation of electrical energy. When the device to be charged is placed on the wireless charging seat, there are scanning coils on the charging seat that overlap with the device to be charged in terms of spatial position, and there are also scanning coils that do not overlap with the device to be charged in terms of spatial position. Since the scanning coils that do not overlap with the device to be charged in terms of spatial position cannot be used for wireless charging, it is necessary to exclude the target parameters corresponding to the scanning coils that do not overlap with the device to be charged in terms of spatial position as interference terms, and use the target parameters corresponding to the scanning coils that overlap with the device to be charged in terms of spatial position for numerical comparison to determine the target transmitting coil. The following embodiments of the present disclosure further illustrate the method for determining the target transmitting coil for power supply.

[0079] Figure 7It is a flowchart of a method for determining a target transmitting coil for power supply shown according to an exemplary embodiment. As Figure 7 shown, the method includes step S301 to step S302.

[0080] In step S301, a target parameter with a value less than a preset threshold among multiple target parameters is determined as a valid target parameter.

[0081] Among them, the transmitting coil corresponding to the valid target parameter overlaps with the device to be charged in terms of spatial position.

[0082] In step S302, according to the valid target parameter and the corresponding relationship between the scanning coil and the transmitting coil, a target transmitting coil for power supply is determined.

[0083] In the embodiments of the present disclosure, the attenuation process of the excitation current on the scanning coil is essentially a process of electrical energy dissipation. Various metal components on the device to be charged will accelerate the electrical energy dissipation. And in the present disclosure, a nanocrystalline laminate is provided in the receiving coil area of the charging device, which can reduce the influence of the metal components on the device to be charged on the electrical energy dissipation. Therefore, among multiple scanning coils that overlap with the device to be charged in terms of spatial position, the closer the corresponding relationship between the coil and the receiving coil area, the larger its target parameter. Combining Figure 6 and Figure 8 respectively shown in the waveform schematic diagrams of the attenuation of the excitation current in the transmitting coil, it can be considered that Figure 8 the corresponding transmitting coil has a closer corresponding relationship with the receiving coil area. Based on the effect of the nanocrystalline laminate provided in the receiving coil area, the influence of various metal components on the device to be charged on the electrical energy dissipation is reduced. Therefore, Figure 8 the attenuation speed of the excitation current of the corresponding transmitting coil is lower than Figure 6 the attenuation speed of the excitation current of the corresponding transmitting coil.

[0084] In summary, the present disclosure can make the area where the transmitting coil corresponding to the scanning coil completely overlap with the area where the receiving coil is located. In this scenario, an excitation current is applied to the scanning coil, and then the time interval required for the peak current value of the excitation current to decay from the first current value to the second current value is determined. According to this time interval, a preset threshold for distinguishing valid target parameters and invalid target parameters is determined, and the preset threshold must be greater than this time interval. It can be understood that when the target parameter is greater than the preset threshold, it indicates that the transmitting coil corresponding to the scanning coil for obtaining this target parameter does not overlap and cannot be used for wireless charging.

[0085] In the embodiments of the present disclosure, valid target parameters and invalid target parameters are distinguished by a preset threshold, and the invalid target parameters are excluded as interference items. Then, according to the valid target parameters and the corresponding relationship between the scanning coil and the transmitting coil, a target transmitting coil for power supply is determined among multiple transmitting coils that overlap with the terminal.

[0086] In the embodiments of the present disclosure, two design schemes for the scanning coil and the transmitting coil in the wireless charging device are proposed. Therefore, there are two corresponding relationships between the scanning coil and the transmitting coil in the present disclosure. The following embodiments of the present disclosure illustrate the corresponding relationship between the scanning coil and the transmitting coil.

[0087] In one implementation manner of the embodiments of the present disclosure, the corresponding relationship between the scanning coil and the transmitting coil includes: the scanning coil and the transmitting coil are the same coil; or the scanning coil and the transmitting coil are different coils, a group of scanning coils corresponds to a single transmitting coil, a group of scanning coils includes a preset number of scanning coils, and the preset number of scanning coils surrounds the single transmitting coil corresponding to the group of scanning coils.

[0088] In the embodiments of the present disclosure, the transmitting coil can simultaneously undertake the scanning function and the transmitting function. In this case, the corresponding relationship between the scanning coil and the transmitting coil is: the scanning coil and the transmitting coil are the same coil. In this case, there are two layout ideas for the arrangement of the transmitting coil. As Figure 9A and 9B It can be seen from the schematic diagrams of the coil layouts in the two wireless charging devices shown respectively that the present disclosure can arrange all the transmitting coils in the same layer, that is, Figure 9A the layout method in Figure 9B ; or the transmitting coils can be divided into two parts, and the two parts of the coils are respectively arranged in different layers, that is,

[0089] In the embodiments of the present disclosure, coils can be respectively set for the scanning function and the transmitting function, that is, the scanning coil and the transmitting coil are different coils. As Figure 10 shown in the schematic diagram of the coil layout in the wireless charging device in Figure 10 , among which, the smaller coil is the scanning coil and the larger coil is the transmitting coil. And multiple smaller coils (scanning coils) correspond to a single larger coil (transmitting coil), and the smaller coils surround the larger coil. Therefore, the target parameters of the scanning coil can be used as the parameters for selecting the target transmitting coil. As

[0090] In the embodiments of the present disclosure, various layout schemes of the scanning coil and the transmitting coil in the wireless charging device are proposed, and different target transmitting coil determination strategies are adopted for different coil layout schemes to meet the usage requirements of various consumers.

[0091] It can be understood that for the above two corresponding relationships between the transmitting coil and the scanning coil, the present disclosure needs to adopt different target transmitting coil determination strategies for the two different corresponding relationships respectively. The following embodiments of the present disclosure further illustrate the method for determining the target transmitting coil.

[0092] Figure 11 It is a flowchart of a method for determining a target transmitting coil for power supply shown according to another exemplary embodiment. As Figure 11 shown, the method includes step S401, step S402A, and step S402B.

[0093] In step S401, the target parameters with values less than the preset threshold among the multiple target parameters are determined as valid target parameters.

[0094] In step S402A, in response to the scanning coil and the transmitting coil being the same coil, the scanning coil corresponding to the largest target parameter among the valid target parameters is determined as the target transmitting coil.

[0095] In step S402B, in response to the scanning coil and the transmitting coil being different coils, the target transmitting coil is determined according to the multiple scanning coils corresponding to the valid target parameters.

[0096] In the embodiments of the present disclosure, when the scanning coil and the transmitting coil are the same coil, the target parameters obtained by the scanning coil are the target parameters of the transmitting coil. The transmitting coil corresponding to the largest target parameter has the highest degree of overlap with the area where the receiving coil in the device to be charged is located, that is, the coupling value between this transmitting coil and the receiving coil is the highest. Therefore, the scanning coil corresponding to the largest target parameter among the valid target parameters is selected and determined as the target transmitting coil.

[0097] In an exemplary embodiment of the present disclosure, as Figure 12A and Figure 12B shown in the schematic diagram of charging a terminal using a multi-coil wireless charging device, after the device to be charged is placed on the wireless charging stand, coils 0 to 7 on the charging stand are all transmitting coils that have a spatial overlap relationship with the terminal. The target parameters corresponding to coils 0 to 7 are all valid parameters. At this time, the target transmitting coil for charging can be determined by comparing the target parameters corresponding to coils 0 to 7 respectively. Combining Figure 12A and Figure 12B it can be known that coil 4 and the receiving coil ( Figure 12AThe coil marked by the black frame in the middle) has the best coincidence relationship, the highest coupling value, and the highest corresponding target parameter. Therefore, coil 4 is selected as the target transmitting coil for charging.

[0098] In the embodiments of the present disclosure, when the scanning coil and the transmitting coil are different coils, a group of scanning coils corresponds to a single transmitting coil, and multiple scanning coils included in the same group of scanning coils surround the single transmitting coil corresponding to the group of scanning coils. Therefore, based on the target parameters corresponding to each scanning coil in the same group of scanning coils, the coupling degree between the transmitting coil and the receiving coil corresponding to the group of scanning coils can be determined. It can be understood that the scanning coils corresponding to the effective target parameters in the present disclosure have an overlapping relationship with the device to be charged. Combining the corresponding relationship between the scanning coil and the transmitting coil, the transmitting coil corresponding to the scanning coil (the scanning coil group it belongs to) corresponding to the effective target parameter will also have a corresponding relationship with the device to be charged. Since the scanning coils corresponding to the effective target parameters can correspond to multiple transmitting coils, after determining the scanning coils corresponding to the effective target parameters in the present disclosure, the target transmitting coil can be determined from the multiple transmitting coils corresponding to the determined scanning coils.

[0099] The following embodiments of the present disclosure further illustrate the method for determining the target transmitting coil.

[0100] Figure 13 is a flowchart of a method for determining a target transmitting coil according to multiple scanning coils corresponding to effective target parameters shown according to an exemplary embodiment. As Figure 13 shown, the method includes step S501 and step S502.

[0101] In step S501, according to the multiple scanning coils corresponding to the effective target parameters and the target parameters, the target group of scanning coils is determined.

[0102] In step S501, the transmitting coil corresponding to the target group of scanning coils is determined as the target transmitting coil.

[0103] It can be understood that the grouped scanning coils are distributed dispersedly. After the device to be charged is placed on the charging base, among the grouped scanning coils that have an overlapping relationship with the device to be charged, there will be scanning coils that have an overlapping relationship with the device to be charged and scanning coils that do not have an overlapping relationship with the device to be charged. Among them, the scanning coils that have an overlapping relationship with the device to be charged will obtain effective target parameters.

[0104] In the embodiments of the present disclosure, when determining the transmitting coil for charging in the case where the scanning coil and the transmitting coil are different coils, according to the scanning coils corresponding to the effective target parameters, multiple groups of scanning coil groups that have an overlapping relationship with the device to be charged are determined. Then, the target transmitting coil is determined from the multiple transmitting coils corresponding to the multiple groups of scanning coil groups that have an overlapping relationship with the device to be charged.

[0105] It can be understood that, in order to ensure that the charging efficiency that can meet the user's needs can be achieved when the device to be charged is placed on the charging base, the present disclosure needs to ensure that the transmitting coils on the charging base have a density that meets the standard, so that after the device to be charged is randomly placed on the charging base, there are transmitting coils on the charging base whose coupling degree with the receiving coil on the device to be charged meets the standard. Based on the corresponding relationship between the transmitting coil and the scanning coil, the arrangement of the scanning coils also meets the standard. After the device to be charged is placed on the charging base, there will be multiple scanning coils that overlap with the device to be charged. And multiple scanning coils that overlap with the device to be charged will respectively belong to different groups of scanning coil groups, including the target group of scanning coils corresponding to the target transmitting coil. The following embodiments of the present disclosure will illustrate the method for determining the target group of scanning coils.

[0106] Figure 14 is a flowchart of a method for determining a target group of scanning coils shown according to an exemplary embodiment. As Figure 14 shown, the method includes steps S601 to S603.

[0107] In step S601, adjacent scanning coils among multiple scanning coils corresponding to valid target parameters are determined.

[0108] Among them, the adjacent scanning coils include a pair of adjacent scanning coils or multiple pairs of adjacent scanning coils, and each pair of adjacent scanning coils includes scanning coils adjacent in the horizontal direction or scanning coils adjacent in the vertical direction.

[0109] In step S602, multiple groups of scanning coils corresponding to the adjacent scanning coils are determined.

[0110] Among them, multiple groups of scanning coils correspond to the same pair of adjacent scanning coils.

[0111] In step S603, the target group of scanning coils among the multiple groups of scanning coils is determined according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils.

[0112] Among them, the mean value of the target parameters is the mean value of the target parameters corresponding to a preset number of scanning coils in the same group of scanning coils.

[0113] In the embodiments of the present disclosure, a single scanning coil belongs to different groups of scanning coil groups at the same time. After the device to be charged is placed on the charging base, if there is only a single scanning coil in a certain group of scanning coils that overlaps with the device to be charged, it indicates that the coupling degree between the transmitting coil and the receiving coil corresponding to this group of scanning coils does not meet the standard and cannot be used for wireless charging; if there are paired adjacent scanning coils in a certain group of scanning coils that overlap with the device to be charged, it indicates that the coupling degree between the transmitting coil and the receiving coil corresponding to this group of scanning coils meets the standard and can be used for wireless charging. Therefore, the present disclosure determines the target group of scanning coils from the scanning coil groups where the adjacent scanning coils corresponding to the effective target parameters are located.

[0114] In the embodiments of the present disclosure, as Figure 10 shown in the schematic diagram of the coil layout in the wireless charging device, the adjacent scanning coils are coils adjacent in the horizontal direction or coils adjacent in the vertical direction. When determining multiple groups of scanning coils corresponding to the adjacent scanning coils, if the adjacent scanning coils are scanning coils adjacent in the horizontal direction, the adjacent scanning coil can be combined with the adjacent scanning coil above it into a scanning coil group, and the adjacent scanning coil can be combined with the adjacent scanning coil below it into a scanning coil group, and the two groups of scanning coils are determined to correspond to the scanning coil group corresponding to this adjacent scanning coil. If the adjacent scanning coils are scanning coils adjacent in the vertical direction, the adjacent scanning coil can be combined with the adjacent scanning coil on its left into a scanning coil group, and the adjacent scanning coil can be combined with the adjacent scanning coil on its right into a scanning coil group, and the two groups of scanning coils are determined to correspond to the scanning coil group corresponding to this adjacent scanning coil.

[0115] It can be understood that based on the target parameters corresponding to each scanning coil in the same group of scanning coils, the coupling degree between the transmitting coil and the receiving coil corresponding to this group of scanning coils can be determined. Therefore, after determining multiple groups of scanning coils that overlap with the device to be charged, based on the target parameters of multiple coils in each group of the above multiple groups of coils, the target group of scanning coils can be determined from the above multiple groups of scanning coils. The target transmitting coil is determined from the transmitting coils corresponding to the target group of scanning coils. The following embodiments of the present disclosure illustrate the method for determining the target group of scanning coils.

[0116] Figure 15 is a flowchart of a method for determining the target group of scanning coils in multiple groups of scanning coils shown according to an exemplary embodiment. As Figure 15 shown, the method includes steps S701 to S702.

[0117] In step S701, multiple groups of scanning coils corresponding to the adjacent scanning coils are determined.

[0118] In step S701, the mean value of the target parameters corresponding to each set of scanning coils in multiple sets of scanning coils is determined, and the set of scanning coils corresponding to the maximum mean value of the target parameters is determined as the target group of scanning coils among the multiple sets of scanning coils.

[0119] In the embodiments of the present disclosure, when the scanning coil and the transmitting coil are different coils, a set of scanning coils corresponds to a single transmitting coil, and multiple scanning coils included in the same set of scanning coils surround the single transmitting coil corresponding to the set of scanning coils. The mean value of multiple target parameters respectively obtained by the multiple scanning coils corresponding to a single transmitting coil can be used as the "target parameter" of the transmitting coil. The transmitting coil corresponding to the maximum mean value of the target parameters has the highest degree of coincidence with the area where the receiving coil is located in the device to be charged, that is, the coupling value between the transmitting coil and the receiving coil is the highest. Therefore, the set of scanning coils corresponding to the highest mean value of the parameters is selected as the target group of scanning coils, and the transmitting coil corresponding to the target group of scanning coils is determined as the target transmitting coil.

[0120] In an exemplary embodiment of the present disclosure, as Figure 16A and Figure 16B shown in the schematic diagram of charging a terminal using a multiple-coil wireless charging device. When the scanning coil and the transmitting coil are different coils, after the device to be charged is placed on the wireless charging base, the scanning coils 0 to 4 on the charging base are all transmitting coils that have a spatial coincidence relationship with the terminal, and the target parameters corresponding to coils 0 to 4 are all valid parameters. Among them, scanning coils 0 to 3 form a set and surround a single transmitting coil. Scanning coils 2 to 5 form a set and surround another transmitting coil. At this time, according to the target parameters corresponding to scanning coils 0 to 3: QS0, QS1, QS2, QS3, the corresponding mean value of the target parameters QE1 is obtained, that is, QE1 = (QS0 + QS1 + QS2 + QS3) / 4. And according to the target parameters corresponding to scanning coils 2 to 5: QS2, QS3, QS4, QS5, the corresponding mean value of the target parameters QE2 is obtained, that is, QE2 = (QS2 + QS3 + QS4 + QS5) / 4. It can be understood that scanning coil 5 has no overlapping relationship with the device to be charged, and the corresponding target parameter is an invalid target parameter. Therefore, the target parameter corresponding to scanning coil 5 is set to 0 and made to participate in the calculation. In view of the fact that scanning coils 2 to 5 are closer to the area where the receiving coil is located in the device to be charged, the mean value of the target parameters QE2 corresponding to them is greater than the mean value of the target parameters QE1 corresponding to scanning coils 0 to 3. That is, the degree of coincidence (coupling value) between the transmitting coil surrounded by scanning coils 2 to 5 and the receiving coil is higher than the degree of coincidence (coupling value) between the transmitting coil surrounded by scanning coils 0 to 3 and the receiving coil. Therefore, the transmitting coil surrounded by scanning coils 2 to 5 is used as the target transmitting coil for charging.

[0121] It can be understood that when a user uses an electrical device such as a terminal, components will be added to the electrical device (such as pasted metal decorations, metal brackets, or other protective cases). If there is metal in the added components, it will affect the wireless charging process, and problems such as overheating and charging interruption will occur during wireless charging. In the embodiments of the present disclosure, the determination of the target parameter will be affected by the components with metal, resulting in a decrease in the target parameter. That is, after an excitation current is applied to the scanning coil, affected by the additional metal component, the current decay rate increases and the target parameter decreases, so that the transmitting coil with a low coincidence degree with the metal component is used as the coil for power supply. To avoid the occurrence of the above problems. In an exemplary embodiment of the present disclosure, as Figure 17 shown in the schematic diagram of using a multi-coil wireless charging device to charge a terminal, the area where the receiving coil of the device to be charged is located is exactly between two transmitting coils. However, there is an additional metal component in the area where transmitting coil 1 is located, which reduces the target parameter obtained by the scanning coil near the metal component and reduces the average value of the target parameter corresponding to transmitting coil 1. Therefore, the charging method proposed in the present disclosure will select transmitting coil 2 as the target transmitting coil for charging.

[0122] In the embodiments of the present disclosure, based on the obtained effective target parameters, the transmitting coil with the highest matching degree (coupling value) with the receiving coil among multiple transmitting coils is determined as the target transmitting coil, and then wireless charging is performed for the device to be charged. Thus, wireless charging is performed at the highest charging efficiency under the current placement position of the device to be charged.

[0123] In the embodiments of the present disclosure, after the device to be charged is placed on the charging base, an excitation current is applied to each scanning coil in the charging base, the target parameter is determined according to the decay of the excitation current in the scanning coil, and the effective target parameter of the scanning coil having a spatial overlap relationship with the device to be charged is determined from all the target parameters according to a preset threshold. When the scanning coil and the transmitting coil are the same coil, the scanning coil corresponding to the maximum target parameter in the effective target parameters is determined as the target transmitting coil. When the scanning coil and the transmitting coil are different coils, the average value of the target parameters of the multiple transmitting coils corresponding to each transmitting coil is determined, and the transmitting coil corresponding to the maximum average value of the target parameters is used as the target transmitting coil. After determining the target transmitting coil, a matching relationship is established between the target transmitting coil and the device to be charged, and the charging device and the device to be charged perform protocol handshake and perform wireless charging. Through the present disclosure, when using a multi-coil wireless charging device to charge a device to be charged, only the transmitting coils in the multi-coil wireless charging device are activated, and the transmitting coil for power transmission is determined according to the target parameters corresponding to each transmitting coil, improving the matching efficiency between the transmitting coil and the receiving coil, and not introducing other sensors, reducing costs.

[0124] In one implementation of the embodiments of the present disclosure, the above charging method is applied to an electronic device, which can be a charger for charging mobile terminal devices, wearable devices, electric vehicles, etc.

[0125] Corresponding to the above wireless charging method proposed by the present disclosure, the present disclosure also proposes a charging device (corresponding to the wireless charging device in the above text), which is provided with a transmitting coil and a scanning coil. The following embodiments of the present disclosure will describe the charging device applicable to the wireless charging method of the present disclosure.

[0126] Figure 18 Provided is a charging device 100, including: a scanning coil 101; a transmitting coil 102; a processor 103, which, in response to a device to be charged being placed on a charging base, determines the target parameters corresponding to each scanning coil among a plurality of scanning coils included in the charging base, and determines a target transmitting coil for power supply according to the corresponding relationship between the scanning coil and the transmitting coil and the target parameters, so that the target transmitting coil establishes a wireless connection with a receiving coil in the device to be charged and performs wireless charging.

[0127] In the embodiments of the present disclosure, when the charging device detects that the device to be charged is placed on the charging base, only the scanning coils on the charging base are activated, all the scanning coils are enabled synchronously, and the target parameters corresponding to each scanning coil are obtained. There is a corresponding relationship between the scanning coils and the transmitting coils in the present disclosure, and the target parameters corresponding to the scanning coils can reflect the charging efficiency of the corresponding transmitting coils during wireless charging. Therefore, by comparing multiple target parameters, the optimal transmitting coil among multiple transmitting coils can be selected as the coil for power supply, and a matching relationship with the receiving coil in the device to be charged is established to start the subsequent wireless charging process.

[0128] In summary, when the present disclosure uses a multi-coil charging device to charge a device to be charged, only the transmitting coils in the multi-coil charging device are activated, and the transmitting coil for power transmission is determined according to the target parameters corresponding to each transmitting coil, which improves the matching efficiency between the transmitting coil and the receiving coil, and does not introduce other sensors, reducing costs.

[0129] In one implementation of the embodiments of the present disclosure, there is a corresponding relationship between the scanning coils and the transmitting coils. A group of scanning coils corresponds to a single transmitting coil. A group of scanning coils includes a preset number of scanning coils, and the preset number of scanning coils surrounds the single transmitting coil corresponding to the group of scanning coils.

[0130] In the embodiments of the present disclosure, coils are respectively provided for the scanning function and the transmitting function, that is, the scanning coils and the transmitting coils are different coils. For example Figure 10As shown in the schematic diagram of the coil layout in the wireless charging device, where the smaller coil is the scanning coil and the larger coil is the transmitting coil. And multiple smaller coils (scanning coils) correspond to a single larger coil (transmitting coil), and the smaller coils surround the larger coil. Therefore, the target parameters of the scanning coils can be used as the parameters for selecting the target transmitting coil. For example, Figure 10 As shown, the correspondence between the scanning coil and the transmitting coil in the present disclosure can be that four scanning coils correspond to one transmitting coil, and the four scanning coils surround the corresponding transmitting coil.

[0131] In an implementation manner of an embodiment of the present disclosure, the processor 103 determines the target parameters corresponding to each scanning coil among the multiple scanning coils included in the charging base: applying an excitation current to each of the multiple scanning coils respectively, and determining the time interval between when the current peak value of the excitation current in each scanning coil decays from the first current value to the second current value; determining the time interval between when the current peak value in each scanning coil decays from the first current value to the second current value as the target parameter corresponding to each scanning coil, where the first current value is greater than the second current value.

[0132] In an embodiment of the present disclosure, based on a fixed driving voltage and a fixed period, an excitation current is uniformly applied to each scanning coil in the wireless charging device. For example, Figure 6 As shown in the waveform schematic diagram of the decay of the excitation current in the transmitting coil. Determine the time interval between when the peak current value in each scanning coil decays from the first current value (th1) to the second current value (th2), and use this time interval as the target parameter. In an embodiment of the present disclosure, the decay process of the excitation current on the coil is essentially a process of electrical energy dissipation. Various metal components on the device to be charged (such as the metal middle frame part, main board part, camera part, electronic components, etc. of the device to be charged) will accelerate the dissipation of electrical energy and affect the target parameter value. Therefore, there are differences in the target parameters obtained by the scanning coils corresponding to different position areas on the device to be charged. And in the area where the receiving coil is located in the device to be charged in the present disclosure, a special material is provided, so that the target parameters obtained by the corresponding scanning coil are different from those of other scanning coils that have an overlapping relationship with the device to be charged, which is convenient for determining the target transmitting coil for power supply based on the target parameters in the subsequent process.

[0133] In an implementation manner of an embodiment of the present disclosure, the processor 103 determines the target transmitting coil for power supply according to the correspondence between the scanning coil and the transmitting coil and the target parameters in the following manner: determining the target parameters with values less than the preset threshold in the target parameters as effective target parameters, and there is an overlap in the spatial position between the transmitting coil corresponding to the effective target parameter and the device to be charged; determining the target transmitting coil according to the multiple scanning coils corresponding to the effective target parameters.

[0134] In the embodiments of the present disclosure, a nanocrystalline laminate is provided in the receiving coil region of the charging device, which can reduce the influence of metal components on the charging device on the dissipation of electric energy. Therefore, among multiple scanning coils that have an overlapping relationship with the charging device in terms of spatial position, the closer the corresponding relationship between the coil and the receiving coil region, the larger the target parameter. The present disclosure can make the transmitting coil corresponding to the scanning coil completely overlap with the region where the receiving coil is located. In this scenario, an excitation current is applied to the scanning coil, and then the time interval required for the peak current value of the excitation current to decay from the first current value to the second current value is determined. According to this time interval, a preset threshold for distinguishing between valid target parameters and invalid target parameters is determined, and the preset threshold must be greater than this time interval. In the embodiments of the present disclosure, valid target parameters and invalid target parameters are distinguished by the preset threshold, and the invalid target parameters are excluded as interference terms. Then, based on the valid target parameters and the corresponding relationship between the scanning coil and the transmitting coil, a target transmitting coil for power supply is determined among multiple transmitting coils that have an overlapping relationship with the terminal.

[0135] In one implementation manner of the embodiments of the present disclosure, the processor 103 determines the target transmitting coil according to multiple scanning coils corresponding to the valid target parameters in the following manner, including: determining the target transmitting coil according to multiple scanning coils corresponding to the valid target parameters.

[0136] In the embodiments of the present disclosure, when the scanning coil and the transmitting coil are different coils, multiple scanning coils surround a corresponding single transmitting coil, and multiple scanning coils surround a single transmitting coil. Based on the positional relationship between the multiple scanning coils and the corresponding single transmitting coil, the target parameters obtained by the multiple scanning coils can indirectly reflect the degree of coincidence between the corresponding transmitting coil and the receiving coil. Therefore, the average value of the multiple target parameters respectively obtained by the multiple scanning coils corresponding to a single transmitting coil can be used as the "target parameter" of the transmitting coil. The transmitting coil corresponding to the largest average value of the target parameters has the highest degree of coincidence with the region where the receiving coil is located in the charging device, that is, the coupling value between the transmitting coil and the receiving coil is the highest. Therefore, the scanning coil corresponding to the average value of the target parameters is selected and determined as the target transmitting coil.

[0137] In one implementation manner of the embodiments of the present disclosure, the processor 103 determines the target transmitting coil according to multiple scanning coils corresponding to the valid target parameters in the following manner: determining the target group of scanning coils according to multiple scanning coils corresponding to the valid target parameters and the target parameters; determining the transmitting coil corresponding to the target group of scanning coils as the target transmitting coil.

[0138] It can be understood that the grouped scanning coils are distributed dispersedly. After the device to be charged is placed on the charging base, among the grouped scanning coils that overlap with the device to be charged, there will be scanning coils that overlap with the device to be charged and scanning coils that do not overlap with the device to be charged. Among them, the scanning coils that overlap with the device to be charged will obtain valid target parameters. In an embodiment of the present disclosure, when the scanning coil and the transmitting coil are different coils, when determining the transmitting coil for charging, according to the scanning coils corresponding to the valid target parameters, multiple groups of scanning coil groups that overlap with the device to be charged are determined. Then, the target transmitting coil is determined from the multiple transmitting coils corresponding to the multiple groups of scanning coil groups that overlap with the device to be charged.

[0139] In an implementation manner of an embodiment of the present disclosure, the processor 103 uses the following method to determine the target group of scanning coils according to the multiple scanning coils and target parameters corresponding to the valid target parameters: Determine the adjacent scanning coils among the multiple scanning coils corresponding to the valid target parameters. The adjacent scanning coils include a pair of adjacent scanning coils or multiple pairs of adjacent scanning coils. Each pair of adjacent scanning coils includes scanning coils adjacent in the horizontal direction or scanning coils adjacent in the vertical direction; Determine the multiple groups of scanning coils corresponding to the adjacent scanning coils, where the multiple groups of scanning coils correspond to the same pair of adjacent scanning coils; According to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, determine the target group of scanning coils in the multiple groups of scanning coils. The mean value of the target parameters is the mean value of the target parameters corresponding to a preset number of scanning coils in the same group of scanning coils.

[0140] In an embodiment of the present disclosure, a single scanning coil belongs to different groups of scanning coil groups at the same time. After the device to be charged is placed on the charging base, if there is only a single scanning coil in a certain group of scanning coils that overlaps with the device to be charged, it indicates that the coupling degree between the transmitting coil and the receiving coil corresponding to this group of scanning coils does not meet the standard and cannot be used for wireless charging; if there are paired adjacent scanning coils in a certain group of scanning coils that overlap with the device to be charged, it indicates that the coupling degree between the transmitting coil and the receiving coil corresponding to this group of scanning coils meets the standard and can be used for wireless charging. Therefore, the present disclosure determines the target group of scanning coils from the scanning coil groups where the adjacent scanning coils corresponding to the valid target parameters are located.

[0141] In an implementation manner of an embodiment of the present disclosure, the processor 103 uses the following method to determine the target group of scanning coils in the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils: Determine the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, and determine the group of scanning coils corresponding to the maximum mean value of the target parameters as the target group of scanning coils in the multiple groups of scanning coils.

[0142] In the embodiments of the present disclosure, when the scanning coil and the transmitting coil are different coils, a set of scanning coils corresponds to a single transmitting coil, and the multiple scanning coils included in the same set of scanning coils surround the single transmitting coil corresponding to the set of scanning coils. The average value of the multiple target parameters respectively obtained by the multiple scanning coils corresponding to a single transmitting coil can be used as the "target parameter" of the transmitting coil. The transmitting coil corresponding to the average value of the target parameters with the largest value has the highest degree of coincidence with the area where the receiving coil is located in the device to be charged, that is, the coupling value between the transmitting coil and the receiving coil is the highest. Therefore, the set of scanning coils corresponding to the highest average parameter value is selected as the target group of scanning coils, and the transmitting coil corresponding to the target group of scanning coils is determined as the target transmitting coil.

[0143] Based on the same concept, the embodiments of the present disclosure also provide a charging device 200.

[0144] It can be understood that, in order to implement the above functions, the charging device 200 provided by the embodiments of the present disclosure includes the corresponding hardware structures and / or software modules for executing each function. Combining the units and algorithm steps of the examples disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiments of the present disclosure.

[0145] Figure 19 is a block diagram of a charging device 200 shown according to an exemplary embodiment. Refer to Figure 19 and the device includes a determination unit 201 and a processing unit 202.

[0146] The determination unit 201 is configured to determine multiple target parameters corresponding to multiple scanning coils in response to the device to be charged being placed on the charging base.

[0147] Wherein, the multiple scanning coils correspond to the multiple target parameters one by one, there is a corresponding relationship between the scanning coils and the transmitting coils used for power supply in the power supply device, and the target parameters corresponding to the scanning coils characterize the charging efficiency of the transmitting coils corresponding to them

[0148] The processing unit 202 is configured to determine a target transmitting coil for power supply according to the multiple target parameters and the corresponding relationship between the scanning coils and the transmitting coils, establish a wireless connection between the target transmitting coil and the receiving coil in the device to be charged, and perform wireless charging on the device to be charged.

[0149] In one implementation, the determination unit 201 determines the target parameter corresponding to each of the multiple scanning coils included in the charging base in the following manner: Apply an excitation current to each of the multiple scanning coils, and determine the time interval between when the current peak value of the excitation current in each scanning coil decays from a first current value to a second current value. The time interval between when the current peak value in each scanning coil decays from the first current value to the second current value is determined as the target parameter corresponding to each scanning coil, where the first current value is greater than the second current value.

[0150] In one implementation, the processing unit 202 determines the target transmitting coil for power supply in the following manner based on the target parameter and the corresponding relationship between the scanning coil and the transmitting coil: Determine the valid target parameters from the multiple target parameters as those with values less than a preset threshold. The transmitting coil corresponding to the valid target parameter has an overlapping spatial position with the device to be charged. Based on the valid target parameter and the corresponding relationship between the scanning coil and the transmitting coil, determine the target transmitting coil for power supply.

[0151] In one implementation, the corresponding relationship between the scanning coil and the transmitting coil includes: The scanning coil and the transmitting coil are the same coil. Or the scanning coil and the transmitting coil are different coils, where a group of scanning coils corresponds to a single transmitting coil. A group of scanning coils includes a preset number of scanning coils, and the preset number of scanning coils surrounds the single transmitting coil corresponding to the group of scanning coils.

[0152] In one implementation, the processing unit 202 determines the target transmitting coil for power supply in the following manner based on the valid target parameter and the corresponding relationship between the scanning coil and the transmitting coil: In response to the scanning coil and the transmitting coil being the same coil, determine the scanning coil corresponding to the maximum target parameter among the valid target parameters as the target transmitting coil. In response to the scanning coil and the transmitting coil being different coils, determine the target transmitting coil based on the multiple scanning coils corresponding to the valid target parameter.

[0153] In one implementation, the processing unit 202 determines the target transmitting coil in the following manner based on the multiple scanning coils corresponding to the valid target parameter: Determine the target group of scanning coils based on the multiple scanning coils corresponding to the valid target parameter and the target parameter. Determine the transmitting coil corresponding to the target group of scanning coils as the target transmitting coil.

[0154] In one implementation, the processing unit 202 determines the target group of scanning coils according to a plurality of scanning coils corresponding to valid target parameters and the target parameters in the following manner: Determine adjacent scanning coils among the plurality of scanning coils corresponding to the valid target parameters. The adjacent scanning coils include a pair of adjacent scanning coils or multiple pairs of adjacent scanning coils. Each pair of adjacent scanning coils includes scanning coils adjacent in the horizontal direction or scanning coils adjacent in the vertical direction. Determine multiple groups of scanning coils corresponding to the adjacent scanning coils, where multiple groups of scanning coils correspond to the same pair of adjacent scanning coils. Determine the target group of scanning coils among the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils. The mean value of the target parameters is the mean value of the target parameters corresponding to a preset number of scanning coils in the same group of scanning coils.

[0155] In one implementation, determining the target group of scanning coils among the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils includes: determining the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, and determining the group of scanning coils corresponding to the maximum mean value of the target parameters as the target group of scanning coils among the multiple groups of scanning coils.

[0156] Regarding the device in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be elaborated here.

[0157] Figure 20 It is a block diagram of a device 300 for charging shown according to an exemplary embodiment. For example, the device 300 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0158] Refer to Figure 20 , the device 300 may include one or more of the following components: a processing component 302, a memory 304, a power component 306, a multimedia component 308, an audio component 310, an input / output (I / O) interface 312, a sensor component 314, and a communication component 316.

[0159] The processing component 302 generally controls the overall operation of the device 300, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations. The processing component 302 may include one or more processors 320 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 302 may include one or more modules to facilitate the interaction between the processing component 302 and other components. For example, the processing component 302 may include a multimedia module to facilitate the interaction between the multimedia component 308 and the processing component 302.

[0160] The memory 304 is configured to store various types of data to support the operation of the device 300. Examples of such data include instructions for any application or method operating on the device 300, contact data, phone book data, messages, pictures, videos, and the like. The memory 304 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0161] The power component 306 provides power to the various components of the device 300. The power component 306 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 300.

[0162] The multimedia component 308 includes a screen that provides an output interface between the device 300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of the touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 308 includes a front camera and / or a rear camera. When the device 300 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0163] The audio component 310 is configured to output and / or input audio signals. For example, the audio component 310 includes a microphone (MIC) that is configured to receive external audio signals when the device 300 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 304 or transmitted via the communication component 316. In some embodiments, the audio component 310 further includes a speaker for outputting audio signals.

[0164] The I / O interface 312 provides an interface between the processing component 302 and a peripheral interface module, which can be a keyboard, a click wheel, buttons, etc. These buttons can include, but are not limited to: a home button, a volume button, a power-on button, and a lock button.

[0165] The sensor assembly 314 includes one or more sensors for providing a status assessment of various aspects of the device 300. For example, the sensor assembly 314 can detect the on / off state of the device 300, the relative positioning of components, such as the display and keypad of the device 300. The sensor assembly 314 can also detect a change in the position of the device 300 or a component of the device 300, the presence or absence of user contact with the device 300, the orientation or acceleration / deceleration of the device 300, and the temperature change of the device 300. The sensor assembly 314 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 314 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 314 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0166] The communication component 316 is configured to facilitate communication between the device 300 and other devices in a wired or wireless manner. The device 300 can access a wireless network based on communication standards, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0167] In an exemplary embodiment, the device 300 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above method.

[0168] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as the memory 304 including instructions, and the above instructions can be executed by the processor 320 of the device 300 to complete the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0169] It can be understood that in the present disclosure, "a plurality of" means two or more, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "the", and "said" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0170] It can be further understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other and do not represent a specific order or degree of importance. In fact, expressions such as "first" and "second" can be used interchangeably completely. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0171] It can be further understood that unless otherwise specified, "connection" includes direct connection without other components between the two, and also includes indirect connection with other elements between the two.

[0172] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood that these operations are required to be performed in the specific order shown or in a serial order, or that all the operations shown are required to be performed to obtain the desired result. In a specific environment, multitasking and parallel processing may be advantageous.

[0173] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure.

[0174] It should be understood that the present disclosure is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A charging method, characterized in that, it includes: In response to the device to be charged being placed on the charging base, determining the target parameter corresponding to each of the multiple scanning coils included in the charging base, where there is a corresponding relationship between the scanning coils and the transmitting coils used for power supply in the power supply device, and the target parameter corresponding to the scanning coil characterizes the charging efficiency of the corresponding transmitting coil; Determining the target transmitting coil for power supply according to the target parameter and the corresponding relationship between the scanning coil and the transmitting coil; Establishing a wireless connection between the target transmitting coil and the receiving coil in the device to be charged, and performing wireless charging on the device to be charged.

2. The method according to claim 1, characterized in that, The determining the target parameter corresponding to each of the multiple scanning coils included in the charging base includes: Applying an excitation current to each of the multiple scanning coils respectively, and determining the time interval between when the current peak value of the excitation current in each scanning coil decays from a first current value to a second current value; Determining the time interval between when the current peak value in each scanning coil decays from the first current value to the second current value as the target parameter corresponding to each scanning coil, where the first current value is greater than the second current value.

3. The method according to claim 1, characterized in that, The determining the target transmitting coil for power supply according to the target parameter and the corresponding relationship between the scanning coil and the transmitting coil includes: Determining the target parameters with values less than a preset threshold among the multiple target parameters as valid target parameters, There is an overlap in the spatial position between the transmitting coil corresponding to the valid target parameter and the device to be charged; Determining the target transmitting coil for power supply according to the valid target parameter and the corresponding relationship between the scanning coil and the transmitting coil.

4. The method according to any one of claims 1 and 3, characterized in that, The corresponding relationship between the scanning coil and the transmitting coil includes: The scanning coil and the transmitting coil are the same coil; or The scanning coil and the transmitting coil are different coils, and a group of scanning coils corresponds to a single transmitting coil, A group of scanning coils includes a preset number of scanning coils, and the preset number of scanning coils surrounds the single transmitting coil corresponding to the group of scanning coils.

5. The method according to claim 3, characterized in that, The determining the target transmitting coil for power supply according to the valid target parameter, the corresponding relationship between the scanning coil and the transmitting coil includes: In response to the scanning coil and the transmitting coil being the same coil, determining the scanning coil corresponding to the maximum target parameter among the valid target parameters as the target transmitting coil; In response to the scanning coil and the transmitting coil being different coils, determining the target transmitting coil according to the multiple scanning coils corresponding to the valid target parameter.

6. The method according to claim 5, characterized in that, The determining the target transmitting coil according to the multiple scanning coils corresponding to the valid target parameter includes: Determining the target group of scanning coils according to the multiple scanning coils corresponding to the valid target parameter and the target parameter; Determine the transmitting coil corresponding to the target group of scanning coils as the target transmitting coil.

7. The method according to claim 6, wherein, the determining the target group of scanning coils according to the multiple scanning coils corresponding to the effective target parameters and the target parameters includes: determining adjacent scanning coils among the multiple scanning coils corresponding to the effective target parameters, the adjacent scanning coils including a pair of adjacent scanning coils or multiple pairs of adjacent scanning coils, and each pair of adjacent scanning coils including laterally adjacent scanning coils or longitudinally adjacent scanning coils; determining multiple groups of scanning coils corresponding to the adjacent scanning coils, wherein, multiple groups of scanning coils correspond to the same pair of adjacent scanning coils; determining the target group of scanning coils among the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, the mean value of the target parameters being the mean value of the target parameters corresponding to a preset number of scanning coils in the same group of scanning coils.

8. The method according to claim 7, wherein, the determining the target group of scanning coils among the multiple groups of scanning coils according to the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils includes: determining the mean value of the target parameters corresponding to each group of scanning coils in the multiple groups of scanning coils, and determining the group of scanning coils corresponding to the maximum mean value of the target parameters as the target group of scanning coils among the multiple groups of scanning coils.

9. A charging device, wherein, it includes: a scanning coil; a transmitting coil; a processor, in response to a device to be charged being placed on a charging base, determining the target parameter corresponding to each scanning coil among the multiple scanning coils included in the charging base, and determining a target transmitting coil for power supply according to the corresponding relationship between the scanning coil and the transmitting coil and the target parameter, establishing a wireless connection between the target transmitting coil and a receiving coil in the device to be charged, and performing wireless charging.

10. The device according to claim 9, wherein, there is a corresponding relationship between the scanning coil and the transmitting coil, a group of scanning coils corresponds to a single transmitting coil, a group of scanning coils includes a preset number of scanning coils, and the preset number of scanning coils surrounds the single transmitting coil corresponding to the group of scanning coils.

11. A charging device, wherein, it includes: a determining unit, configured to, in response to a device to be charged being placed on a charging base, determine the target parameter corresponding to each scanning coil among the multiple scanning coils included in the charging base, there is a corresponding relationship between the scanning coil and a transmitting coil for power supply in a power supply device, and the target parameter corresponding to the scanning coil characterizes the charging efficiency of the transmitting coil corresponding thereto; a processing unit, configured to determine a target transmitting coil for power supply according to the target parameter and the corresponding relationship between the scanning coil and the transmitting coil, establish a wireless connection between the target transmitting coil and a receiving coil in the device to be charged, and perform wireless charging on the device to be charged.

12. An electronic device, wherein, it includes: a processor: a memory for storing instructions executable by the processor; wherein, the processor is configured to: execute the charging method according to any one of claims 1 to 8.

13. A storage medium, characterized in that, instructions are stored in the storage medium, and when the instructions in the storage medium are executed by a processor, the processor is enabled to execute the charging method according to any one of claims 1 to 8.

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