A wireless charging system, device and device to be charged

Abstract

Embodiments of the present application provide a wireless charging system, a device and a device to be charged, to improve the power conversion efficiency of wireless charging. In the wireless charging system provided by the present application, the wireless charging device obtains channel information of a transmission channel and waveform parameters for indicating a waveform of an electromagnetic wave signal in a charging period; generates a target electromagnetic wave signal according to the channel information and the waveform parameters, and sends the target electromagnetic wave signal to the device to be charged through the transmission channel; wherein the channel information includes signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel; the device to be charged converts the received target electromagnetic wave signal into a direct current signal, and charges according to the direct current signal. The target electromagnetic wave signal determined by the wireless charging device can adapt to channel transmission, improve the power conversion efficiency of wireless charging; and there is no need to know the channel information and the structural information of the device to be charged in advance, which improves the practicability of the wireless charging method.

Description

Technical Field

[0001] This application relates to the field of wireless charging, and more particularly to a wireless charging system, device, and device to be charged. Background Technology

[0002] Wireless charging technology refers to the use of electromagnetic waves to carry energy and charge the device. The development of wireless charging technology has made charging no longer necessary and has met people's needs for charging freedom.

[0003] In a wireless charging system, the device being charged receives an electromagnetic wave signal, which is then converted into electrical energy to charge the device. Research has found that electromagnetic wave signals with a high peak-to-average power ratio (PAPR) can significantly improve the power conversion efficiency of a wireless charging system. However, power conversion efficiency is also affected by the wireless channel and the hardware structure of the device being charged. For example, the wireless channel can cause waveform distortion in the electromagnetic wave signal, reducing the PAPR and thus lowering the power conversion efficiency. Furthermore, different devices have different hardware structures, resulting in varying signal reception and conversion performance, which in turn affects the power conversion efficiency.

[0004] Currently, a common solution to improve power conversion efficiency is to use known channel information and the structural information of the device to be charged to calculate the optimal waveform through optimization algorithms, thereby reducing electromagnetic signal loss during transmission. However, in practical applications, obtaining the channel information and the structural information of the device to be charged in advance is difficult. Therefore, existing methods for improving wireless charging power conversion efficiency have limitations. Summary of the Invention

[0005] This application provides a wireless charging system, device, and device to be charged, in order to improve the power conversion efficiency of wireless charging.

[0006] In a first aspect, this application provides a wireless charging system, which includes a wireless charging device and a device to be charged;

[0007] The wireless charging device is configured to acquire channel information of a transmission channel and waveform parameters for indicating the waveform of an electromagnetic wave signal within a charging cycle; wherein, the transmission channel is a channel between the wireless charging device and the device to be charged at a first frequency point, and the channel information includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel; generate a target electromagnetic wave signal based on the channel information and the waveform parameters, and send the target electromagnetic wave signal to the device to be charged through the transmission channel;

[0008] The device to be charged is configured to receive the target electromagnetic wave signal sent by the wireless charging device through the transmission channel; convert the target electromagnetic wave signal into a DC signal; and charge the device according to the DC signal.

[0009] In the wireless charging system provided in this application embodiment, the wireless charging device can determine, within one charging cycle, channel information including signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel, as well as waveform parameters for indicating the waveform of the electromagnetic wave signal. Then, it can transmit a target electromagnetic wave signal according to the channel information and waveform parameters, enabling the transmitted target electromagnetic wave signal to adapt to channel transmission and improving the power conversion efficiency of wireless charging. Furthermore, this method does not require prior knowledge of the channel information or the structural information of the device to be charged; it only needs to determine the channel information and waveform parameters within one charging cycle, thus improving the practicality of the wireless charging method.

[0010] In one possible design, when obtaining waveform parameters for indicating the waveform of an electromagnetic wave signal, the specific steps are: selecting the waveform parameter from at least one preset candidate waveform parameters.

[0011] With this design, the wireless charging device does not need to know the hardware structure of the receiver to calculate waveform parameters, but can select waveform parameters from at least one pre-set candidate waveform parameters, thereby improving the efficiency of determining waveform parameters.

[0012] The wireless charging device is further configured to: when selecting the waveform parameter from at least one preset candidate waveform parameters, specifically: send at least one first test signal to the device to be charged via the transmission channel; wherein the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and any one first test signal is generated based on the corresponding candidate waveform parameter; receive a first measurement result sent by the device to be charged via the transmission channel; the first measurement result is obtained by the device to be charged measuring the signal quality of the at least one first test signal; and select the waveform parameter from the at least one candidate waveform parameters based on the first measurement result.

[0013] The device to be charged is further configured to: receive at least one first test signal sent by the wireless charging device through the transmission channel; measure the signal quality of the at least one first test signal; generate the first measurement result based on the signal quality of the at least one first test signal; and send the first measurement result to the wireless charging device through the transmission channel.

[0014] With this design, the wireless charging device can determine at least one first test signal based on at least one candidate waveform parameter. Each first test signal corresponds to one candidate waveform parameter. The device to be charged can generate a first measurement result based on the signal quality of the received at least one first test signal and send the first measurement result to the wireless charging device to assist the wireless charging device in determining the waveform parameter from at least one candidate waveform parameter. The target electromagnetic wave signal determined by the waveform parameter obtained by this method can be more adapted to the current transmission channel and improve the power conversion efficiency.

[0015] In one possible design, the first measurement result includes the signal quality of the at least one first test signal; the wireless charging device, when selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result, is specifically configured to: determine the first target test signal with the highest signal quality based on the signal quality of the at least one first test signal included in the first measurement result; and determine the candidate waveform parameter corresponding to the first target test signal as the waveform parameter from the at least one candidate waveform parameters.

[0016] Alternatively, the first measurement result may contain first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals; the wireless charging device, when selecting the waveform parameter from the at least one candidate waveform parameters according to the first measurement result, is specifically used to: determine the first target test signal indicated by the first indication information; and determine the candidate waveform parameter corresponding to the first target test signal as the waveform parameter among the at least one candidate waveform parameters.

[0017] With this design, the first measurement result may include the signal quality of at least one first test signal, or may include first indication information for indicating the first target test signal with the highest signal quality. Thus, after receiving the first measurement result, the wireless charging device can determine the first target test signal with the highest signal quality, and then determine the optimal waveform parameter among at least one candidate waveform parameter.

[0018] In one possible design, when the wireless charging device acquires the channel information of the transmission channel, it is specifically used to: perform a channel measurement process on the transmission channel to acquire the channel information; or select the channel information from at least one preset candidate channel information.

[0019] Through this design, the embodiments of this application provide multiple ways to determine channel information. The wireless charging device can perform channel measurement to obtain channel information or select channel information from at least one preset candidate channel information, ensuring that the wireless charging device obtains channel information in real time. The target electromagnetic wave signal determined according to the channel information can adapt to channel transmission and reduce the loss of the target electromagnetic wave signal in the transmission channel.

[0020] In one possible design, when the wireless charging device performs a channel measurement process on the transmission channel to obtain the channel information, it specifically performs the following: sending a beacon signal to the device to be charged through the transmission channel, the beacon signal being used by the device to be charged to perform channel measurement; and receiving the channel information sent by the device to be charged through the transmission channel.

[0021] The device to be charged is further configured to: receive the beacon signal sent by the wireless charging device through the transmission channel, and perform channel measurement based on the beacon signal to obtain the channel information; and send the channel information to the wireless charging device through the transmission channel.

[0022] In one possible design, the device to be charged is further configured to: send a beacon signal to the wireless charging device via the transmission channel, the beacon signal being used by the wireless charging device to perform channel measurement;

[0023] When the wireless charging device performs a channel measurement process on the transmission channel to obtain the channel information, it specifically performs the following: receiving the beacon signal sent by the device to be charged through the transmission channel, and performing channel measurement based on the beacon signal to obtain the channel information.

[0024] Through the above design, the wireless charging device can measure the channel information of the current transmission channel through beacon signals, ensuring the accuracy of the acquired channel information, thereby reducing the loss of target electromagnetic wave signals in the current wireless channel transmission and improving power conversion efficiency.

[0025] In one possible design, when the wireless charging device selects the channel information from at least one preset candidate channel information, it specifically performs the following steps: sending at least one second test signal to the device to be charged via the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; receiving a second measurement result sent by the device to be charged via the transmission channel; the second measurement result is obtained by the device to be charged measuring the signal quality of the at least one second test signal; and selecting the channel information from the at least one candidate channel information based on the second measurement result.

[0026] The device to be charged is further configured to: receive at least one second test signal sent by the wireless charging device through the transmission channel; measure the signal quality of each of the at least one second test signal; generate a second measurement result based on the signal quality of the at least one second test signal; and send the second measurement result to the wireless charging device through the transmission channel.

[0027] In one possible design, the second measurement result includes the signal quality of the at least one second test signal; the wireless charging device, when selecting the channel information from the at least one candidate channel information based on the second measurement result, is specifically configured to: determine the second target test signal with the highest signal quality based on the signal quality of the at least one second test signal included in the second measurement result; and determine the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information.

[0028] Alternatively, the second measurement result may contain second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signals; the wireless charging device, when selecting the channel information from the at least one candidate channel information according to the second measurement result, is specifically used to: determine the second target test signal indicated by the second indication information; and determine the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information.

[0029] Through the above design, the wireless charging device can preset at least one candidate channel information, and at least one second test signal corresponds one-to-one with at least one candidate channel information. The wireless charging device can send at least one second test information to the device to be charged, and select channel information from at least one candidate channel information based on the second measurement result fed back by the device to be charged. In this way, there is no need to calculate the channel information, but the channel information is determined by measuring the signal quality of at least one second test signal, which reduces the amount of calculation for the device to be charged and improves the efficiency of wireless charging while ensuring the accuracy of the channel information.

[0030] In one possible design, the waveform parameter is an exponential factor used to perform an exponential operation on the signal attenuation in the channel information during the generation of the target electromagnetic wave signal.

[0031] In one possible design, the target electromagnetic wave signal satisfies the following formula:

[0032]

[0033] Where n represents the first frequency point, w n This represents the target electromagnetic wave signal. A represents the transmission delay included in the channel information. n The channel information represents the signal attenuation, P is the total transmit power of the wireless charging device, and β is the waveform parameter.

[0034] In one possible design, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna from the wireless charging device and a receiving antenna from the device to be charged.

[0035] With this design, a set of transceiver antennas corresponds to a transmission channel. According to the wireless charging method provided in the embodiments of this application, the target electromagnetic wave signal can be determined for multiple transmission channels corresponding to multiple sets of antennas. Then, the wireless charging device can send different electromagnetic wave signals through different transceiver antennas to obtain the desired signal radiation pattern, thereby achieving beamforming and improving the power conversion efficiency of wireless charging of the device to be charged.

[0036] In one possible design, the wireless charging device is further configured to: receive charging request information sent by the device to be charged via the transmission channel before acquiring channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal;

[0037] The device to be charged is further configured to: determine that the current power level is greater than or equal to the power level required to send the charging request information, and send the charging request information to the wireless charging device through the transmission channel.

[0038] With this design, the device to be charged can send a charging request to the wireless charging device after determining that it has enough power to send a charging request. This allows the wireless charging device to identify the target electromagnetic wave signal and charge the device efficiently.

[0039] Secondly, this application provides a wireless charging device, including a signal processing module, a power signal generation module, and at least one transceiver antenna;

[0040] The signal processing module is used to acquire channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal within a charging cycle; wherein, the transmission channel is the channel between the wireless charging device and the device to be charged at a first frequency point, and the channel information includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel.

[0041] The power signal generation module is used to generate a target electromagnetic wave signal based on the channel information and the waveform parameters.

[0042] The at least one transceiver antenna is used to transmit the target electromagnetic wave signal to the device to be charged through the transmission channel.

[0043] In one possible design, when obtaining waveform parameters for indicating the waveform of an electromagnetic wave signal, the specific steps are: selecting the waveform parameter from at least one preset candidate waveform parameters.

[0044] In one possible design, the at least one transceiver antenna is further configured to: transmit at least one first test signal to the device to be charged via the transmission channel; wherein the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and each first test signal is generated based on the corresponding candidate waveform parameter; and receive a first measurement result transmitted by the device to be charged via the transmission channel; wherein the first measurement result is obtained by the device to be charged measuring the signal quality of the at least one first test signal.

[0045] When the signal processing module selects the waveform parameter from at least one preset candidate waveform parameters, it is specifically used to: select the waveform parameter from the at least one candidate waveform parameters based on the first measurement result.

[0046] In one possible design, the first measurement result includes the signal quality of the at least one first test signal; the signal processing module, when selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result, is specifically configured to: determine the first target test signal with the highest signal quality based on the signal quality of the at least one first test signal included in the first measurement result; and determine the candidate waveform parameter corresponding to the first target test signal as the waveform parameter from the at least one candidate waveform parameters.

[0047] Alternatively, the first measurement result may contain first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals; the signal processing module, when selecting the waveform parameter from the at least one candidate waveform parameters according to the first measurement result, is specifically used to: determine the first target test signal indicated by the first indication information; and determine the candidate waveform parameter corresponding to the first target test signal as the waveform parameter among the at least one candidate waveform parameters.

[0048] In one possible design, when the signal processing module acquires the channel information of the transmission channel, it is specifically used to: perform a channel measurement process on the transmission channel to acquire the channel information; or select the channel information from at least one preset candidate channel information.

[0049] In one possible design, the at least one transceiver antenna is further configured to: transmit a beacon signal to the device to be charged via the transmission channel, the beacon signal being used by the device to be charged to perform channel measurements; and receive the channel information transmitted by the device to be charged via the transmission channel.

[0050] In one possible design, the at least one transceiver antenna is further configured to: receive the beacon signal transmitted by the device to be charged through the transmission channel; when the signal processing module performs a channel measurement process on the transmission channel to obtain the channel information, it is specifically configured to: perform channel measurement based on the beacon signal to obtain the channel information.

[0051] In one possible design, the at least one transceiver antenna is further configured to: transmit the at least one second test signal to the device to be charged via the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and any second test signal is generated based on the corresponding candidate channel information; and transmit the at least one second test signal to the device to be charged via the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and any second test signal is generated based on the corresponding candidate channel information.

[0052] When the signal processing module selects the channel information from at least one preset candidate channel information, it is specifically used to: select the channel information from the at least one candidate channel information based on the second measurement result.

[0053] In one possible design, the second measurement result includes the signal quality of the at least one second test signal; the signal processing module, when selecting the channel information from the at least one candidate channel information based on the second measurement result, is specifically configured to: determine the second target test signal with the highest signal quality based on the signal quality of the at least one second test signal included in the second measurement result; and determine the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information.

[0054] Alternatively, the second measurement result may contain second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signals; the signal processing module, when selecting the channel information from the at least one candidate channel information according to the second measurement result, is specifically used to: determine the second target test signal indicated by the second indication information; and determine the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information.

[0055] In one possible design, the waveform parameter is an exponential factor used to perform an exponential operation on the signal attenuation in the channel information during the generation of the target electromagnetic wave signal.

[0056] In one possible design, the target electromagnetic wave signal satisfies the following formula:

[0057]

[0058] Where n represents the first frequency point, w n This represents the target electromagnetic wave signal. A represents the transmission delay included in the channel information. n The channel information represents the signal attenuation, P is the total transmit power of the wireless charging device, and β is the waveform parameter.

[0059] In one possible design, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna from the wireless charging device and a receiving antenna from the device to be charged.

[0060] In one possible design, the at least one transceiver antenna is further configured to: receive charging request information sent by the device to be charged through the transmission channel before the signal processing module acquires the channel information of the transmission channel and the waveform parameters for indicating the electromagnetic wave signal waveform.

[0061] Thirdly, this application provides a device to be charged, including a transceiver antenna and a power receiving module;

[0062] The at least one transceiver antenna is used to receive a target electromagnetic wave signal sent by the wireless charging device through a transmission channel; the target electromagnetic wave signal is generated by the wireless charging device based on the channel information of the transmission channel and waveform parameters used to indicate the waveform of the electromagnetic wave signal.

[0063] The power receiving module is used to convert the target electromagnetic wave signal into a DC signal and charge the device according to the DC signal.

[0064] In one possible design, the at least one transceiver antenna is further configured to: receive at least one first test signal transmitted by the wireless charging device through the transmission channel; wherein the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and any one first test signal is generated based on the corresponding candidate waveform parameter; and transmit the first measurement result to the wireless charging device through the transmission channel, so that the wireless charging device selects the waveform parameter from the at least one candidate waveform parameter based on the first measurement result.

[0065] The power receiving module is further configured to: measure the signal quality of the at least one first test signal; the device to be charged further includes a signal processing module, which is configured to: generate the first measurement result based on the signal quality of the at least one first test signal.

[0066] In one possible design, the first measurement result includes the signal quality of the at least one first test signal; or the first measurement result includes first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals.

[0067] In one possible design, the at least one transceiver antenna is further configured to: receive a beacon signal transmitted by the wireless charging device via the transmission channel; and transmit the channel information to the wireless charging device via the transmission channel.

[0068] The signal processing module is also used to: perform channel measurement based on the beacon signal to obtain the channel information.

[0069] In one possible design, the at least one transceiver antenna is further configured to: transmit a beacon signal to the wireless charging device via the transmission channel, the beacon signal being used by the wireless charging device to perform channel measurements.

[0070] In one possible design, the at least one transceiver antenna is further configured to: receive at least one second test signal transmitted by the wireless charging device through the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; and transmit the second measurement result to the wireless charging device through the transmission channel, so that the wireless charging device selects the channel information from the at least one candidate channel information based on the second measurement result.

[0071] The power receiving module is also used to: measure the signal quality of each of the at least one second test signal;

[0072] The signal processing module is further configured to: generate the second measurement result based on the signal quality of the at least one second test signal.

[0073] In one possible design, the second measurement result includes the signal quality of the at least one second test signal; or the second measurement result includes second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signals.

[0074] In one possible design, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna from the wireless charging device and a receiving antenna from the device to be charged.

[0075] In one possible design, the signal processing module is further configured to: determine that the current battery level is greater than or equal to the battery level required to send the charging request information;

[0076] The at least one transceiver antenna is also used to: send the charging request information to the wireless charging device through the transmission channel.

[0077] Fourthly, embodiments of this application provide a wireless charging method applied to a wireless charging device, the method comprising:

[0078] During a charging cycle, channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal are acquired; wherein, the transmission channel is the channel between the wireless charging device and the device to be charged at a first frequency point, and the channel information includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel.

[0079] A target electromagnetic wave signal is generated based on the channel information and the waveform parameters, and then transmitted to the device to be charged via the transmission channel through the transceiver antenna 1801.

[0080] In one possible design, obtaining the waveform parameters used to indicate the waveform of the electromagnetic wave signal includes: selecting the waveform parameters from at least one preset candidate waveform parameters.

[0081] In one possible design, selecting the waveform parameter from at least one preset candidate waveform parameter includes:

[0082] At least one first test signal is sent to the device to be charged through the transmission channel; wherein the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and any one first test signal is generated based on the corresponding candidate waveform parameter; a first measurement result sent by the device to be charged is received through the transmission channel; the first measurement result is obtained by the device to be charged from measuring the signal quality of the at least one first test signal; and the waveform parameter is selected from the at least one candidate waveform parameter based on the first measurement result.

[0083] In one possible design, the first measurement result includes the signal quality of the at least one first test signal; the step of selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result includes: determining a first target test signal with the highest signal quality based on the signal quality of the at least one first test signal included in the first measurement result; and determining the candidate waveform parameter corresponding to the first target test signal as the waveform parameter from the at least one candidate waveform parameters.

[0084] Alternatively, the first measurement result may contain first indication information, which indicates the first target test signal with the highest signal quality among the at least one first test signals; the step of selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result includes: determining the first target test signal indicated by the first indication information; and determining the candidate waveform parameter corresponding to the first target test signal as the waveform parameter from the at least one candidate waveform parameters.

[0085] In one possible design, acquiring the channel information of the transmission channel includes: performing a channel measurement process on the transmission channel to acquire the channel information; or selecting the channel information from at least one preset candidate channel information.

[0086] In one possible design, the process of performing channel measurement on the transmission channel to obtain the channel information includes: sending a beacon signal to the device to be charged through the transmission channel, the beacon signal being used by the device to be charged to perform channel measurement; and receiving the channel information sent by the device to be charged through the transmission channel.

[0087] In one possible design, the process of performing channel measurement on the transmission channel to obtain the channel information includes: receiving the beacon signal sent by the device to be charged through the transmission channel, and performing channel measurement based on the beacon signal to obtain the channel information.

[0088] In one possible design, selecting the channel information from at least one preset candidate channel information includes: sending at least one second test signal to the device to be charged via the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; receiving a second measurement result sent by the device to be charged via the transmission channel; the second measurement result is obtained by the device to be charged measuring the signal quality of the at least one second test signal; and selecting the channel information from the at least one candidate channel information based on the second measurement result.

[0089] In one possible design, the second measurement result includes the signal quality of the at least one second test signal; selecting the channel information from the at least one candidate channel information based on the second measurement result includes: determining a second target test signal with the highest signal quality based on the signal quality of the at least one second test signal included in the second measurement result; and determining the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information; or the second measurement result includes second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signal; selecting the channel information from the at least one candidate channel information based on the second measurement result includes: determining the second target test signal indicated by the second indication information; and determining the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information.

[0090] In one possible design, the waveform parameter is an exponential factor used to perform an exponential operation on the signal attenuation in the channel information during the generation of the target electromagnetic wave signal.

[0091] In one possible design, the target electromagnetic wave signal satisfies the following formula:

[0092]

[0093] Where n represents the first frequency point, w n This represents the target electromagnetic wave signal. A represents the transmission delay included in the channel information. n The channel information represents the signal attenuation, P is the total transmit power of the wireless charging device, and β is the waveform parameter.

[0094] In one possible design, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna from the wireless charging device and a receiving antenna from the device to be charged.

[0095] In one possible design, before acquiring the channel information of the transmission channel and the waveform parameters used to indicate the electromagnetic wave signal waveform, the method further includes: receiving charging request information sent by the device to be charged through the transmission channel.

[0096] Fifthly, embodiments of this application provide a wireless charging method applied to a device to be charged, the method comprising:

[0097] The system receives a target electromagnetic wave signal sent by a wireless charging device through a transmission channel; the target electromagnetic wave signal is generated by the wireless charging device based on the channel information of the transmission channel and waveform parameters used to indicate the waveform of the electromagnetic wave signal; the target electromagnetic wave signal is converted into a DC signal, and charging is performed according to the DC signal.

[0098] In one possible design, the method further includes: receiving at least one first test signal sent by a wireless charging device through the transmission channel; wherein the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and each first test signal is generated based on the corresponding candidate waveform parameter; measuring the signal quality of the at least one first test signal; generating a first measurement result based on the signal quality of the at least one first test signal; and sending the first measurement result to the wireless charging device through the transmission channel, so that the wireless charging device selects the waveform parameter from the at least one candidate waveform parameter based on the first measurement result.

[0099] In one possible design, the first measurement result includes the signal quality of the at least one first test signal; or the first measurement result includes first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals.

[0100] In one possible design, the method further includes: receiving a beacon signal sent by the wireless charging device through the transmission channel; performing channel measurement based on the beacon signal to obtain the channel information; and sending the channel information to the wireless charging device through the transmission channel.

[0101] In one possible design, the method further includes: sending a beacon signal to the wireless charging device via the transmission channel, the beacon signal being used by the wireless charging device to perform channel measurements.

[0102] In one possible design, the method further includes: receiving at least one second test signal transmitted by the wireless charging device through the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; measuring the signal quality of each of the at least one second test signals; generating a second measurement result based on the signal quality of the at least one second test signal; and transmitting the second measurement result to the wireless charging device through the transmission channel, so that the wireless charging device selects the channel information from the at least one candidate channel information based on the second measurement result.

[0103] In one possible design, the second measurement result includes the signal quality of the at least one second test signal; or the second measurement result includes second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signals.

[0104] In one possible design, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna from the wireless charging device and a receiving antenna from the device to be charged.

[0105] In one possible design, the method further includes: determining that the current battery level is greater than or equal to the battery level required to send the charging request information; and sending the charging request information to the wireless charging device through the transmission channel.

[0106] In a sixth aspect, embodiments of this application provide a wireless charging device, including a transceiver antenna and at least one processor, wherein the at least one processor is coupled to at least one memory, and the at least one processor is configured to read instructions stored in the at least one memory to execute the method provided in the fourth aspect above.

[0107] In a seventh aspect, embodiments of this application provide a device to be charged, including a transceiver antenna and at least one processor, the at least one processor being coupled to at least one memory, the at least one processor being configured to read instructions stored in the at least one memory to execute the method provided in the fifth aspect above. Attached Figure Description

[0108] Figure 1 This is an architecture diagram of a wireless charging system.

[0109] Figure 2 This is a schematic diagram illustrating the power conversion efficiency of a high PAPR random signal and a constant amplitude continuous wave signal.

[0110] Figure 3 This is a schematic diagram illustrating the change of PAPR (PAspectral response) during the transmission of an electromagnetic wave signal in a wireless channel.

[0111] Figure 4 An interactive flowchart of a wireless charging method provided in an embodiment of this application;

[0112] Figure 5 This is a schematic diagram illustrating a signal radiation method for broadcast power generation and a signal radiation method after beamforming, according to an embodiment of this application.

[0113] Figure 6 A schematic diagram of a charging cycle provided in an embodiment of this application;

[0114] Figure 7A flowchart illustrating a method for determining waveform parameters provided in this application embodiment;

[0115] Figure 8 A flowchart illustrating the first method for determining channel information provided in this application embodiment;

[0116] Figure 9 A flowchart illustrating a second method for determining channel information provided in this application embodiment;

[0117] Figure 10 A flowchart illustrating a third method for determining channel information provided in this application embodiment;

[0118] Figure 11 This is a schematic diagram of the structure of a wireless charging device and a device to be charged, provided in an embodiment of this application.

[0119] Figure 12 A schematic diagram of the frame structure of the electromagnetic wave signal transmitted between the first type of wireless charging device and the device to be charged, provided in an embodiment of this application;

[0120] Figure 13 A flowchart illustrating an example of a first wireless charging method provided in this application embodiment;

[0121] Figure 14 A schematic diagram of the frame structure of the electromagnetic wave signal transmitted between the second type of wireless charging device and the device to be charged, provided in an embodiment of this application;

[0122] Figure 15 A flowchart illustrating an example of a second wireless charging method provided in this application embodiment;

[0123] Figure 16 A schematic diagram of the frame structure of the electromagnetic wave signal transmitted between the third type of wireless charging device and the device to be charged, provided in an embodiment of this application.

[0124] Figure 17 A flowchart illustrating an example of a third wireless charging method provided in this application embodiment;

[0125] Figure 18 This is a schematic diagram of the structure of a wireless charging device provided in an embodiment of this application;

[0126] Figure 19 This is a schematic diagram of the structure of a device to be charged, provided in an embodiment of this application.

[0127] Figure 20a This is a schematic diagram of the structure of the first type of device to be charged according to the embodiments of this application, and a power conversion efficiency diagram corresponding to different candidate waveform parameters when wirelessly charging the device to be charged.

[0128] Figure 20bThis is a schematic diagram of the structure of the second type of device to be charged according to an embodiment of this application, and a power conversion efficiency diagram corresponding to different candidate waveform parameters when wirelessly charging the device to be charged. Detailed Implementation

[0129] To facilitate understanding of the embodiments of this application, the following terms related to the embodiments of this application are introduced:

[0130] Wireless charging technology refers to using electromagnetic waves to carry energy and charge devices. Specifically, a wireless charging device emits electromagnetic waves via a transceiver antenna. These waves travel through the air, and the device receiving them converts them into a DC signal, thus using the converted electrical energy to charge itself. Wireless charging can achieve transmission distances in the meter range; therefore, this technology can also be called long-range wireless charging.

[0131] Figure 1 This is an architecture diagram of a wireless charging system, for reference. Figure 1 The wireless charging system includes a wireless charging device and at least one device to be charged, such as... Figure 1 The example shown uses three devices to be charged (device 1, device 2, and device 3). Optionally, in this embodiment, the wireless charging device can be a charging base station or other equipment, and the devices to be charged can be mobile phones, tablets, wearable devices (e.g., watches, bracelets, helmets, headphones, etc.), in-vehicle devices, augmented reality (AR) / virtual reality (VR) devices, laptops, ultra-mobile personal computers (UMPCs), netbooks, personal digital assistants (PDAs), smart home devices (e.g., smart TVs, smart speakers, smart cameras, etc.), and other terminal devices, as well as Internet of Things (IoT) devices corresponding to various applications.

[0132] During wireless charging, the wireless charging device can send electromagnetic wave signals to the device to be charged. After receiving the electromagnetic wave signals, the device to be charged converts the electromagnetic wave signals into DC signals, thereby charging the device.

[0133] In wireless charging technology, improving the power conversion efficiency (PAPR) of converting electromagnetic wave signals into DC signals is a crucial issue. Research has found that electromagnetic wave signals with a higher PAPR can significantly improve the power conversion efficiency of wireless charging systems. Figure 2This diagram illustrates the power conversion efficiency of a high PAPR random signal and a constant-amplitude continuous wave signal. The solid line represents the power conversion efficiency of the high PAPR random signal, and the dashed line represents the power conversion efficiency of the constant-amplitude continuous wave signal. Figure 2 As can be seen, when the input power is the same, the power conversion efficiency of a random signal with a high PAPR is higher than that of a continuous wave signal with equal amplitude. Therefore, improving the PAPR of the electromagnetic wave signal is an effective way to improve the wireless charging conversion efficiency.

[0134] During the transmission of electromagnetic signals in a wireless channel, the electromagnetic signals will experience waveform distortion, which will lead to a decrease in the PAPR of the electromagnetic signals. Figure 3 This diagram illustrates the change in PAPR (Pattern Response Rate) of an electromagnetic wave signal during wireless channel transmission. The dashed line represents the waveform of the original transmitted electromagnetic wave signal, and the solid line represents the waveform of the electromagnetic wave signal after transmission through the wireless channel. Figure 3 It can be seen that after the electromagnetic wave signal is transmitted through the wireless channel, the waveform of the electromagnetic wave signal is distorted, which will lead to a decrease in the PAPR of the electromagnetic wave signal, and further affect the power conversion efficiency of wireless charging.

[0135] In addition, power conversion efficiency is also affected by the hardware structure of the device being charged. Different devices have different hardware structures, resulting in different signal reception and conversion performance, which in turn affects the power conversion efficiency.

[0136] A common solution to improve power conversion efficiency involves using known channel information and the structural information of the device to be charged to calculate the optimal waveform through optimization algorithms, thereby reducing electromagnetic signal loss during transmission. However, in real-world applications, channel information can change due to various factors, and knowing the channel information in advance may result in significant errors. Furthermore, there are numerous types and manufacturers of devices to be charged, each with different structures, making it difficult to obtain the structural information of every single device in advance. Therefore, existing methods for improving wireless charging power conversion efficiency have limitations.

[0137] To address the aforementioned problems, this application provides a wireless charging method to improve the power conversion efficiency of wireless charging. This method can be applied to... Figure 1 The wireless charging system shown below is for reference only. Figure 4 The flowchart shown illustrates a wireless charging method, which provides a detailed explanation of the method.

[0138] S401: The wireless charging device generates electricity in a broadcast manner and sends a broadcast charging signal; the device to be charged receives the broadcast charging signal.

[0139] Broadcast-based power generation refers to wireless charging devices that do not perform beamforming or waveform optimization on the transmitted electromagnetic signals. When the wireless charging device's transmitting and receiving antennas are transceiver arrays, beamforming refers to adjusting the parameters of the transceiver array so that signals at certain angles experience constructive interference, while signals at other angles experience destructive interference, thereby obtaining the desired signal radiation pattern. For example, Figure 5 The diagram illustrates the signal radiation method of broadcast power generation and the signal radiation method after beamforming. It can be seen that during the broadcast power generation stage, the electromagnetic wave signal transmitted by the wireless charging device is not targeted at any specific device to be charged. Waveform optimization processing refers to adjusting the waveform parameters of the transmitted electromagnetic wave signal to reduce signal loss during transmission in the wireless channel. For example, the wireless charging method provided in this application embodiment can be considered as a wireless charging method combining beamforming and beam optimization.

[0140] During the broadcast power generation phase, the wireless charging device can broadcast a charging signal. Any device within the transmission range of the broadcast charging signal can receive the signal.

[0141] S402: The device to be charged determines whether its own power is greater than the power required to send the charging request information. If yes, proceed to step S404; otherwise, proceed to step S403.

[0142] Optionally, the charging request information sent by the device to be charged to the wireless charging device can be, for example, an acknowledgment response (ACK) sent by the device to be charged, which indicates that the device to be charged has received the broadcast charging signal sent by the wireless charging device.

[0143] S403: The device to be charged converts the received broadcast charging signal into a DC signal, resulting in inefficient charging of the device to be charged.

[0144] Understandably, since wireless charging devices do not perform beamforming and waveform optimization on the transmitted electromagnetic wave signals when sending broadcast charging signals, the power of the broadcast charging signal that the device to be charged can receive is not high. However, at this time, the device to be charged's own power is not enough to support the device to send a charging request information to the wireless charging device. Therefore, the device to be charged needs to convert the received broadcast charging signal into a DC signal to inefficiently charge the device until the device's power is greater than the power required to send the charging request information.

[0145] S404: The device to be charged sends a charging request to the wireless charging device; the wireless charging device receives the charging request from the device to be charged.

[0146] S405: During a charging cycle, the wireless charging device acquires channel information of the transmission channel and waveform parameters used to indicate the waveform of the electromagnetic wave signal, and generates a target electromagnetic wave signal based on the channel information and waveform parameters.

[0147] The transmission channel is the channel between the wireless charging device and the device to be charged at a first frequency point. The first frequency point can be a pre-defined frequency point, for example, N pre-defined frequency points, where N is a positive integer greater than or equal to 1. The transmission channel between the wireless charging device and the device to be charged serves as the medium for transmitting electromagnetic wave signals. Specifically, the wireless charging device transmits electromagnetic wave signals through a transmitting antenna, and the electromagnetic wave signals are transmitted to the device to be charged through the transmission channel. The device to be charged receives the electromagnetic wave signals through a receiving antenna. It is understandable that, since the actual transmission channel carrying the signal is not a perfectly ideal channel, signal attenuation and delay will occur when the electromagnetic wave signal is transmitted through the transmission channel. The channel information of the transmission channel includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel.

[0148] A waveform parameter is a parameter value used to indicate the waveform of an electromagnetic wave signal. The waveform parameter can be a constant value.

[0149] For example, the target electromagnetic wave signal can satisfy Formula 1:

[0150]

[0151] Where n represents the first frequency point, w n Indicates the target electromagnetic wave signal, 0 <n≤N; A represents the transmission delay contained in the channel information. n This represents the signal attenuation contained in the channel information, P is the total transmit power of the wireless charging device, and β is the waveform parameter.

[0152] As can be seen from Formula 1, the waveform parameter β can be an exponential factor that performs an exponential operation on the signal attenuation in the channel information during the generation of the target electromagnetic wave signal.

[0153] As described above, the channel information of the transmission channel is subject to change. Therefore, in this embodiment, a charging cycle is defined. Within one charging cycle, the wireless charging device generates a target electromagnetic wave signal and sends it to the device to be charged. The device to be charged can convert the received target electromagnetic wave signal into a DC signal, thereby charging the device. After one charging cycle ends, at the beginning of the next charging cycle, the wireless charging device can re-determine the channel information and waveform parameters and generate the target electromagnetic wave signal to ensure that the transmitted target electromagnetic wave signal can adapt to the transmission channel in real time, thereby reducing signal loss and transmission delay when the target electromagnetic wave signal is transmitted through the transmission channel.

[0154] In one optional implementation, a charging cycle may include a target electromagnetic wave signal determination phase and a wireless power transfer phase. For example, Figure 6 This diagram illustrates a charging cycle. In the target electromagnetic wave signal determination phase, the wireless charging device determines channel information and waveform parameters, and then determines the target electromagnetic wave signal based on these parameters. In the wireless power transfer phase, the wireless charging device sends the target electromagnetic wave signal to the device being charged. The device being charged can convert the received target electromagnetic wave signal into a DC signal during this phase, thereby charging the device.

[0155] Optionally, after determining the channel information and waveform parameters, the wireless charging device can generate the target electromagnetic wave signal according to Formula 1 above.

[0156] S406: The wireless charging device sends a target electromagnetic wave signal to the device to be charged through a transmission channel.

[0157] S407: The device to be charged converts the target electromagnetic wave signal into a DC signal and charges according to the DC signal.

[0158] Furthermore, as can be seen from Formula 1, in S405, the parameters that the wireless charging device needs to determine before generating the target electromagnetic wave signal include channel information and waveform parameters. The method for determining waveform parameters in the wireless charging device of this application embodiment is described below:

[0159] Figure 7 A flowchart of a method for determining waveform parameters provided in this application embodiment is shown. The method includes the following steps:

[0160] S701: The wireless charging device sends at least one first test signal to the device to be charged through a transmission channel, and the device to be charged receives at least one first test signal sent by the wireless charging device through the transmission channel.

[0161] Optionally, at least one candidate waveform parameter can be preset. This candidate waveform parameter can be determined based on historical waveform parameters stored in the wireless charging device, or it can be set based on the experience of a technician. Each candidate waveform parameter corresponds one-to-one with at least one first test signal, and each first test signal is generated based on its corresponding candidate waveform parameter. Furthermore, as shown in Formula 1, the electromagnetic wave signal can be determined by channel information and waveform parameters. Therefore, channel information can be preset, for example, using preset attenuation and time delay as the channel information corresponding to at least one first test signal.

[0162] S702: The device to be charged measures the signal quality of each first test signal and generates a first measurement result based on the signal quality of each first test signal.

[0163] The device to be charged may measure the signal quality of each first test signal by measuring the received power of each first test signal. The first measurement result may include the signal quality of each of the at least one first test signal, or the first measurement result may include first indication information, which indicates the first target test signal with the highest signal quality among the at least one first test signals.

[0164] In one optional embodiment, the device to be charged can measure the signal quality of each received first test signal and generate a first measurement result based on the measured signal quality of at least one first test signal. The device to be charged can directly use the signal quality of each first test signal as the first measurement result; for example, the device to be charged can measure the signal quality of each first test signal it receives and use that signal quality as the first measurement result. Alternatively, the device to be charged can receive at least one first test signal, measure the signal quality of each of the at least one first test signal, and then use the signal quality of all the at least one first test signals as the first measurement result.

[0165] In another optional embodiment, the device to be charged can measure the signal quality of each received first test signal, take the first test signal with the highest signal quality among at least one first test signal as the first target test signal, and take the identifier of the first target test signal as the first indication information. The first measurement result may include the first indication information.

[0166] S703: The device to be charged sends a first measurement result to the wireless charging device through the transmission channel, and the wireless charging device receives the first measurement result sent by the device to be charged through the transmission channel.

[0167] Optionally, when the first measurement result includes the signal quality of each of at least one first test signal, the device to be charged may, after receiving and measuring the signal quality of each first test signal, use the signal quality of the first test signal as the first measurement result and send the first measurement result to the wireless charging device. That is, the device to be charged needs to send at least one first measurement result to the wireless charging device. Alternatively, the device to be charged may, after receiving and measuring the signal quality of at least one first test signal, use the signal quality of at least one first test signal as the first measurement result. That is, the device to be charged sends the first measurement result to the wireless charging device after receiving all the first test signals.

[0168] It should be noted that the first measurement result, including the signal quality of one first test signal or the signal quality of all first test signals, is an exemplary description provided in the embodiments of this application. The first measurement result may also include the signal quality of a set number of first test signals. In this case, the device to be charged can divide the signal quality of all first test signals into multiple first measurement results and feed them back to the wireless charging device. That is to say, the embodiments of this application do not limit the way the device to be charged sends the first measurement result. Any method that can be used to feed back the signal quality of at least one first test signal to the wireless charging device is applicable.

[0169] S704: The wireless charging device selects a waveform parameter from at least one preset candidate waveform parameter based on the first measurement result.

[0170] In one optional implementation, when the first measurement result includes the signal quality of each of the at least one first test signals, the wireless charging device determines the first target test signal with the highest signal quality among the at least one first test signals based on the first measurement result, and uses the candidate waveform parameters corresponding to the first target test signal as waveform parameters. For example, when the signal quality is the received power, the wireless charging device can use the candidate waveform parameters corresponding to the first test signal with the highest received power as waveform parameters.

[0171] In another optional implementation, when the first measurement result includes first indication information, the wireless charging device can determine the first target test signal indicated by the first indication information and use the candidate waveform parameters corresponding to the first target test signal as waveform parameters.

[0172] The following describes several methods for determining channel information using the wireless charging device in this application:

[0173] Method 1

[0174] Figure 8A flowchart illustrating a first method for determining channel information provided in this application embodiment, the method comprising the following steps:

[0175] S801: The wireless charging device sends a beacon signal to the device to be charged through a transmission channel, and the device to be charged receives the beacon signal sent by the wireless charging device through a transmission channel.

[0176] Optionally, the beacon signal is used for channel measurement of the device to be charged. The channel beacon can be a pre-configured or protocol-defined electromagnetic wave signal.

[0177] S802: The device to be charged performs channel measurement based on the received beacon signal to obtain channel information.

[0178] Optionally, after receiving the beacon signal, the device to be charged calculates the attenuation and delay during wireless channel transmission based on the beacon signal originally sent by the wireless charging device and the received beacon signal as pre-configured or agreed upon by the protocol, and uses the determined attenuation and delay as channel information.

[0179] It should be noted that the device to be charged can calculate channel information according to channel estimation methods. These methods include least squares (LS) channel estimation, minimum mean square error (MMSE) channel estimation, and maximum likelihood (ML) channel estimation. Taking the LS channel estimation method as an example, the device to be charged can determine the channel information according to the following formula:

[0180]

[0181] in, X represents the channel information obtained based on the LS channel estimation method, where X is the beacon signal sent by the wireless charging device and Y is the beacon signal received by the device to be charged.

[0182] S803: The device to be charged sends channel information to the wireless charging device through the transmission channel, and the wireless charging device receives the channel information sent by the device to be charged through the transmission channel.

[0183] In one alternative implementation, the device to be charged can send channel information to the wireless charging device via a channel feedback signal.

[0184] Method 2

[0185] Figure 9 A flowchart illustrating a second method for determining channel information provided in this application embodiment, the method comprising the following steps:

[0186] S901: The device to be charged sends a beacon signal to the wireless charging device through the transmission channel, and the wireless charging device receives the beacon signal sent by the device to be charged through the transmission channel.

[0187] S902: The wireless charging device performs channel measurement based on the received beacon signal to obtain channel information.

[0188] It should be noted that the method for measuring channel information by the wireless charging device can refer to the method for measuring channel information by the device to be charged in Method 1, and the repetition will not be repeated.

[0189] Method 3

[0190] Figure 10 A flowchart illustrating a third method for determining channel information provided in this application embodiment, comprising the following steps:

[0191] S1001: The wireless charging device sends at least one second test signal to the device to be charged through a transmission channel, and the device to be charged receives at least one second test signal sent by the wireless charging device through the transmission channel.

[0192] Optionally, at least one candidate channel information can be pre-set. This candidate channel information can be determined based on historical channel information stored in the wireless charging device, or it can be set based on the experience of a technician. Each candidate channel information corresponds one-to-one with at least one second test signal, and each second test signal is generated based on the corresponding candidate channel information. Furthermore, according to Formula 1, the electromagnetic wave signal is determined by the channel information and waveform parameters. Therefore, a waveform parameter can be pre-set. For example, if the waveform parameter β corresponding to at least one second test signal is set to 1, then each second test signal corresponds to one candidate channel information, and the waveform parameter β of each second test signal is 1.

[0193] S1002: The device to be charged measures the signal quality of each second test signal and generates a second measurement result based on the signal quality of each second test signal.

[0194] The device to be charged may measure the signal quality of each second test signal by measuring the received power of each second test signal. The second measurement result may include the signal quality of at least one second test signal, or the second measurement result may include second indication information, which indicates the second target test signal with the highest signal quality among at least one second test signal.

[0195] In one optional embodiment, the device to be charged can measure the signal quality of each received second test signal and generate a second measurement result based on the measured signal quality of at least one second test signal. The device to be charged can directly use the signal quality of each second test signal as the second measurement result. For example, the device to be charged can measure the signal quality of each second test signal it receives and use that signal quality as the second measurement result; or, after receiving at least one second test signal and measuring the signal quality of each of the at least one second test signal, the device to be charged can use the signal quality of all the at least one second test signal as the second measurement result.

[0196] In another optional embodiment, the device to be charged can measure the signal quality of each received second test signal, take the second test signal with the highest signal quality among at least one second test signal as the second target test signal, and take the identifier of the second target test signal as the second indication information. The second measurement result may include the second indication information.

[0197] S1003: The device to be charged sends a second measurement result to the wireless charging device through the transmission channel, and the wireless charging device receives the second measurement result sent by the device to be charged through the transmission channel.

[0198] Optionally, when the second measurement result includes the signal quality of each of the at least one second test signal, the device to be charged may, after receiving and measuring the signal quality of each second test signal, use the signal quality of the second test signal as the second measurement result and send the second measurement result to the wireless charging device. That is, the device to be charged needs to send at least one second measurement result to the wireless charging device. Alternatively, the device to be charged may, after receiving and measuring the signal quality of at least one second test signal, use the signal quality of at least one second test signal as the second measurement result. That is, the device to be charged sends the second measurement result to the wireless charging device after receiving all the second test signals.

[0199] It should be noted that the second measurement result, including the signal quality of one second test signal or the signal quality of all second test signals, is an exemplary description provided in the embodiments of this application. The second measurement result may also include the signal quality of a set number of second test signals. In this case, the device to be charged can divide the signal quality of all second test signals into multiple second measurement results and feed them back to the wireless charging device. That is to say, the embodiments of this application do not limit the way the device to be charged sends the second measurement result. Any method that can be used to feed back the signal quality of at least one second test signal to the wireless charging device is applicable.

[0200] S1004: The wireless charging device selects channel information from at least one preset candidate channel information based on the second measurement result.

[0201] In one optional implementation, when the second measurement result is used to indicate the signal quality of each of the at least one second test signals, the wireless charging device determines the second target test signal with the highest signal quality among the at least one second test signals based on the second measurement result, and uses the candidate channel information corresponding to the second target test signal as channel information.

[0202] In another optional implementation, when the second measurement result contains second indication information, the wireless charging device can determine the second target test signal indicated by the second indication information and use the candidate channel information corresponding to the second target test signal as channel information.

[0203] In another optional embodiment of this application, the transceiver antenna on the wireless charging device can be a transceiver antenna array. A transmitting antenna in the wireless charging device and a receiving antenna in the device to be charged form a transceiver antenna combination. In at least one antenna combination formed by the transceiver antenna array of the wireless charging device and the transceiver antenna of the device to be charged, each antenna combination corresponds to a transmission channel. The target electromagnetic wave signal generated in each transmission channel can be referenced... Figure 4 The wireless charging method is implemented as shown. For example, in method one for determining channel information, the wireless charging device can transmit at least one beacon signal through at least one antenna in the transceiver antenna array of the wireless charging device, and the device to be charged can receive at least one beacon signal through the transceiver antenna. Then, after the device to be charged performs channel measurement based on at least one beacon signal, the obtained channel information may include channel information of at least one transmission channel. In this case, the channel information may be, for example,:

[0204]

[0205] Among them, A ijrepresents the signal attenuation at the i-th frequency point of the transmission channel corresponding to the j-th transmitting-receiving antenna among the M transmitting-receiving antennas included in the antenna array of the wireless charging device contained in the channel information, ψ ij represents the transmission delay at the i-th frequency point of the transmission channel corresponding to the j-th transmitting-receiving antenna contained in the channel information; in implementation, N frequency points can be obtained through pre-division, where 0 < i ≤ N and 0 < j ≤ M.

[0206] When the wireless charging device receives the above channel information , the target electromagnetic wave signal can be determined according to the following Formula 2:

[0207]

[0208] where, w nm represents the electromagnetic wave signal transmitted at the n-th frequency point on the transmission channel corresponding to the m-th transmitting-receiving antenna, 0 < n ≤ N, 0 < m ≤ M, P is the total transmit power of the wireless charging device, A mn represents the signal attenuation at the i-th frequency point of the transmission channel corresponding to the m-th transmitting-receiving antenna contained in the channel information, ψ mn represents the transmission delay at the n-th frequency point of the transmission channel corresponding to the m-th transmitting-receiving antenna contained in the channel information; β can be a waveform parameter determined according to the Figure 7 illustrated method.

[0209] Through the above method, the electromagnetic wave signal to be transmitted in the wireless energy transmission stage can be determined respectively for the transmission channel corresponding to each transmitting-receiving antenna in the antenna array of the wireless charging device. By transmitting electromagnetic wave signals with different waveforms through different antennas, electromagnetic wave signals at certain angles can obtain constructive interference while electromagnetic wave signals at other angles can obtain destructive interference, thereby obtaining a desired signal radiation pattern to realize beamforming and improve the power conversion efficiency of wireless charging for the device to be charged.

[0210] It can be understood that the transmitting-receiving antennas on the device to be charged can also be a transmitting-receiving antenna array. When both the transmitting-receiving antennas of the device to be charged and the wireless charging device are transmitting-receiving antenna arrays, the channel information can be three-dimensional channel information. The target electromagnetic wave signal determined by the wireless charging device includes the electromagnetic wave signal transmitted on the transmission channel corresponding to any antenna combination formed by any transmitting-receiving antenna in the transmitting-receiving antenna array of the wireless charging device and any transmitting-receiving antenna in the transmitting-receiving antenna array of the device to be charged. The determination methods of the channel information and the waveform parameters can still refer to the method described in the above embodiments, and the repeated parts will not be described again.

[0211] It should be noted that the embodiment of the present application does not limit the sequence of determining the channel information and the waveform parameters. For example, the wireless charging device can determine the waveform parameters according to the method Figure 7 illustrated, and then according to the Figures 8-10 Any of the methods for determining channel information, or the wireless charging device can, according to Figures 8-10 Any of the methods described above determines the channel information, and then according to Figure 7 The method shown determines the waveform parameters. Furthermore, when the wireless charging device first determines the channel information and then the waveform parameters, it can use the channel information as the channel information corresponding to at least one first test signal when generating at least one first test signal. Similarly, when the wireless charging device first determines the waveform parameters and then the channel information, if the method used... Figure 10 The method shown in step three determines the channel information, and the wireless charging device can use the determined waveform parameters as waveform parameters of at least one second test signal.

[0212] The following describes a possible structure of a wireless charging device and a device to be charged according to an embodiment of this application. Figure 11 This is a schematic diagram of the structure of a wireless charging device and a device to be charged provided in an embodiment of this application. Optionally, by... Figure 1 As shown in the description of the wireless charging system, the wireless charging device can simultaneously wirelessly charge at least one device. For ease of description, in... Figure 11 The example shown is a device waiting to be charged.

[0213] refer to Figure 11 The wireless charging device may include a first transceiver antenna 1101, a first signal processing module 1102, and a power signal generation module 1103. Optionally, it may also include a first communication module 1104. Switch 1 can be switched to connect the first transceiver antenna 1101 and the first communication module 1104, or switch 1 can be switched to connect the first transceiver antenna 1101 and the power signal generation module 1103. It should be noted that, in practice, the first communication module 1104 can also be connected to a separate transceiver antenna, distinct from the first transceiver antenna 1101. The electromagnetic wave signal transmitted through the first communication module 1104 can be received or transmitted by the separate transceiver antenna without the need for switch 1.

[0214] The functions of each module in the wireless charging device are described in further detail below:

[0215] The first signal processing module 1102 is used to acquire channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal within a charging cycle; wherein, the transmission channel is the channel between the wireless charging device and the device to be charged at a first frequency point, and the channel information includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel.

[0216] The power signal generation module 1103 is used to generate a target electromagnetic wave signal based on the channel information and the waveform parameters.

[0217] The first transceiver antenna 1101 is used to transmit the target electromagnetic wave signal to the device to be charged through the transmission channel.

[0218] In one embodiment, when the first signal processing module 1102 acquires waveform parameters for indicating the waveform of an electromagnetic wave signal, it is specifically used to: select the waveform parameter from at least one preset candidate waveform parameters.

[0219] In one embodiment, the first transceiver antenna 1101 is further configured to: transmit at least one first test signal to the device to be charged via the transmission channel; wherein the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and any one first test signal is generated based on the corresponding candidate waveform parameter; and receive a first measurement result transmitted by the device to be charged via the transmission channel; wherein the first measurement result is obtained by the device to be charged measuring the signal quality of the at least one first test signal.

[0220] When the first signal processing module 1102 selects the waveform parameter from at least one preset candidate waveform parameters, it is specifically used to: select the waveform parameter from the at least one candidate waveform parameters based on the first measurement result.

[0221] Optionally, after receiving the first measurement result, the first transceiver antenna 1101 can send the first measurement result to the first communication module 1104, which in turn sends the first measurement result to the first signal processing module 1102.

[0222] In one embodiment, the first measurement result includes the signal quality of the at least one first test signal; the first signal processing module 1102, when selecting the waveform parameter from the at least one candidate waveform parameters according to the first measurement result, is specifically configured to: determine the first target test signal with the highest signal quality according to the signal quality of the at least one first test signal included in the first measurement result; and determine the candidate waveform parameter corresponding to the first target test signal as the waveform parameter from the at least one candidate waveform parameters.

[0223] Alternatively, the first measurement result may contain first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals; the first signal processing module 1102, when selecting the waveform parameter from the at least one candidate waveform parameters according to the first measurement result, is specifically used to: determine the first target test signal indicated by the first indication information; and determine the candidate waveform parameter corresponding to the first target test signal as the waveform parameter among the at least one candidate waveform parameters.

[0224] In one embodiment, when the first signal processing module 1102 acquires the channel information of the transmission channel, it is specifically used to: perform a channel measurement process on the transmission channel to acquire the channel information; or select the channel information from at least one preset candidate channel information.

[0225] Optionally, the first communication module 1104 is further configured to: generate the beacon signal, the beacon signal being used by the device to be charged to perform channel measurement.

[0226] In one embodiment, the first transceiver antenna 1101 is further configured to: transmit a beacon signal to the device to be charged via the transmission channel; and receive the channel information transmitted by the device to be charged via the transmission channel.

[0227] In one embodiment, the first transceiver antenna 1101 is further configured to: receive the beacon signal transmitted by the device to be charged through the transmission channel;

[0228] The first signal processing module 1102, when performing a channel measurement process on the transmission channel to obtain the channel information, is specifically used to: perform channel measurement based on the beacon signal to obtain the channel information.

[0229] In one embodiment, the first transceiver antenna 1101 is further configured to: transmit the at least one second test signal to the device to be charged via the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and any second test signal is generated based on the corresponding candidate channel information; and transmit the at least one second test signal to the device to be charged via the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and any second test signal is generated based on the corresponding candidate channel information.

[0230] When the first signal processing module 1102 selects the channel information from at least one preset candidate channel information, it is specifically used to: select the channel information from the at least one candidate channel information according to the second measurement result.

[0231] Optionally, after receiving the first measurement result, the first transceiver antenna 1101 can send the first measurement result to the first communication module 1104, which in turn sends the first measurement result to the first signal processing module 1102.

[0232] In one embodiment, the second measurement result includes the signal quality of the at least one second test signal; the first signal processing module 1102, when selecting the channel information from the at least one candidate channel information according to the second measurement result, is specifically configured to: determine the second target test signal with the highest signal quality according to the signal quality of the at least one second test signal included in the second measurement result; and determine the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information.

[0233] Alternatively, the second measurement result may contain second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signals; the first signal processing module 1102, when selecting the channel information from the at least one candidate channel information according to the second measurement result, is specifically used to: determine the second target test signal indicated by the second indication information; and determine the candidate channel information corresponding to the second target test signal as the channel information among the at least one candidate channel information.

[0234] In one embodiment, the waveform parameter is an exponential factor that performs an exponential operation on the signal attenuation in the channel information during the generation of the target electromagnetic wave signal.

[0235] In one embodiment, the target electromagnetic wave signal satisfies the following formula:

[0236]

[0237] Where n represents the first frequency point, w n This represents the target electromagnetic wave signal. A represents the transmission delay included in the channel information. n The channel information represents the signal attenuation, P is the total transmit power of the wireless charging device, and β is the waveform parameter.

[0238] In one embodiment, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna in the wireless charging device and a receiving antenna in the device to be charged.

[0239] In one embodiment, the first transceiver antenna 1101 is further configured to: receive charging request information sent by the device to be charged through the transmission channel before the first signal processing module 1102 acquires the channel information of the transmission channel and the waveform parameters for indicating the waveform of the electromagnetic wave signal.

[0240] It should be noted that both the power signal generation module 1103 and the first communication module 1104 may include an aliaser, an oscillator, and a power amplifier, which are used to process the baseband signals of the electromagnetic wave signals (such as target electromagnetic wave signals, at least one first test signal, at least one second test signal, and beacon signals) generated in the above two modules into high-frequency signals that can be transmitted in the wireless channel. They can also be used to process the high-frequency signals received by the first transceiver antenna 1101 into baseband signals.

[0241] refer to Figure 11 The device to be charged may include a second transceiver antenna 1105 and a power receiving module 1106. Optionally, it may also include a second signal processing module 1107 and a second communication module 1108. Switch 2 can be switched to connect the second transceiver antenna 1105 and the second communication module 1108, or switch 2 can be switched to connect the second transceiver antenna 1105 and the power receiving module 1103. It should be noted that, in practice, the second communication module 1108 can also be connected to a separate transceiver antenna, distinct from the second transceiver antenna 1105. The electromagnetic wave signal transmitted through the second communication module 1108 can be received or transmitted by the separate transceiver antenna without the need for switch 2.

[0242] The functions of each module in the charging device are described in further detail below:

[0243] The second transceiver antenna 1105 is used to receive the target electromagnetic wave signal sent by the wireless charging device through the transmission channel; the target electromagnetic wave signal is generated by the wireless charging device based on the channel information of the transmission channel and the waveform parameters used to indicate the waveform of the electromagnetic wave signal.

[0244] The power receiving module 1106 is used to convert the target electromagnetic wave signal into a DC signal and charge the device according to the DC signal.

[0245] In one embodiment, the second transceiver antenna 1105 is further configured to: receive at least one first test signal sent by the wireless charging device through the transmission channel; wherein the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and any one first test signal is generated based on the corresponding candidate waveform parameter; and send the first measurement result to the wireless charging device through the transmission channel, so that the wireless charging device selects the waveform parameter from the at least one candidate waveform parameter based on the first measurement result.

[0246] The power receiving module 1106 is also used to: measure the signal quality of the at least one first test signal;

[0247] The second signal processing module 1107 is used to generate the first measurement result based on the signal quality of the at least one first test signal.

[0248] In one embodiment, the first measurement result includes the signal quality of the at least one first test signal; or the first measurement result includes first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals.

[0249] In one embodiment, the second transceiver antenna 1105 is further configured to: receive a beacon signal transmitted by the wireless charging device through the transmission channel; and transmit the channel information to the wireless charging device through the transmission channel.

[0250] The second signal processing module 1107 is further configured to: perform channel measurement based on the beacon signal to obtain the channel information.

[0251] In one embodiment, the second transceiver antenna 1105 is further configured to: transmit a beacon signal to the wireless charging device via the transmission channel, the beacon signal being used by the wireless charging device to perform channel measurements.

[0252] Optionally, the second communication module 1108 is used to generate the beacon signal.

[0253] In one embodiment, the second transceiver antenna 1105 is further configured to: receive at least one second test signal sent by the wireless charging device through the transmission channel; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and any second test signal is generated based on the corresponding candidate channel information; and send the second measurement result to the wireless charging device through the transmission channel, so that the wireless charging device selects the channel information from the at least one candidate channel information based on the second measurement result.

[0254] The power receiving module 1106 is further configured to: measure the signal quality of each of the at least one second test signals;

[0255] The second signal processing module 1107 is further configured to: generate the second measurement result based on the signal quality of the at least one second test signal.

[0256] Optionally, after the second signal processing module 1107 determines the second measurement result, it can send the second measurement result to the second communication module 1108, which in turn sends the second measurement result to the second transceiver antenna 1105.

[0257] In one embodiment, the second measurement result includes the signal quality of the at least one second test signal; or the second measurement result includes second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signals.

[0258] In one embodiment, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna in the wireless charging device and a receiving antenna in the device to be charged.

[0259] In one embodiment, the second signal processing module 1107 is further configured to: determine that the current power level is greater than the power level required to send the charging request information;

[0260] The second transceiver antenna 1105 is also used to send the charging request information to the wireless charging device.

[0261] It should be noted that both the power receiving module 1106 and the second communication module 1108 may include an aliaser, an oscillator, and a power amplifier, which are used to process the baseband signal of the received electromagnetic wave signal into a high-frequency signal that can be transmitted in the wireless channel, and can also be used to process the high-frequency signal received by the second transceiver antenna 1105 into a baseband signal.

[0262] The following is combined with Figure 11 The structure of the wireless charging device and the device to be charged is shown, and the wireless charging method provided in the embodiments of this application is further described with several specific examples:

[0263] Example 1

[0264] In one optional implementation, the frame structure of the electromagnetic wave signal transmitted between the wireless charging device and the device to be charged in the wireless charging system provided in this application embodiment can be found in [reference needed]. Figure 12 , Figure 12Taking a charging cycle of duration T as an example, a charging cycle includes a target electromagnetic wave signal determination stage and a wireless power transfer stage. In the target electromagnetic wave signal determination stage, the wireless charging device sends a beacon signal and at least one first test signal. The device to be charged sends channel information and a first measurement result to the wireless charging device. The wireless charging device determines waveform parameters based on the first measurement result and determines the target electromagnetic wave signal based on the channel information and waveform parameters. In the wireless power transfer stage, the wireless charging device sends the target electromagnetic wave signal to the device to be charged. The device to be charged receives the target electromagnetic wave signal, converts it into a DC signal, and charges the device according to the DC signal.

[0265] Figure 13 A flowchart of a wireless charging method provided for Example 1, which includes the following steps:

[0266] S1301: The wireless charging device switches switch 1 to the first communication module 1104, and the first communication module 1104 generates a beacon signal.

[0267] S1302: The first communication module 1104 sends the beacon signal to the first transceiver antenna 1101.

[0268] S1303: The first transceiver antenna 1101 transmits the beacon signal to the second transceiver antenna 1105 of the device to be charged.

[0269] S1304: The device to be charged switches switch 2 to the second communication module 1108, and the second transceiver antenna 1105 sends the beacon signal to the second communication module 1108.

[0270] S1305: The second communication module 1108 sends the beacon signal to the second signal processing module 1107.

[0271] S1306: The second signal processing module 1107 calculates channel information based on the received beacon signal and the beacon signal originally sent by the pre-configured or protocol-agreed wireless charging device.

[0272] S1307: The second signal processing module 1107 sends the channel information to the second communication module 1108.

[0273] S1308: The second communication module 1108 sends the channel information to the second transceiver antenna 1105.

[0274] S1309: The second transceiver antenna 1105 sends channel information to the first transceiver antenna 1101.

[0275] S1310: The first transceiver antenna 1101 sends channel information to the first communication module 1104.

[0276] S1311: The first communication module 1104 sends the channel information to the first signal processing module 1102.

[0277] S1312: The first signal processing module 1102 sends the channel information to the power signal generation module 1103.

[0278] S1313: The wireless charging device switches switch 1 to power signal generation module 1103, which generates at least one first test signal based on channel information and at least one candidate waveform parameter.

[0279] S1314: The power signal generation module 1103 sends at least one first test signal to the first transceiver antenna 1101.

[0280] S1315: The first transceiver antenna 1101 sends at least one first test signal to the second transceiver antenna 1105.

[0281] S1316: The device to be charged switches switch 2 to power receiving module 1106, and the second transceiver antenna 1105 sends at least one first test signal to power receiving module 1106.

[0282] S1317: The power receiving module 1106 measures the received power of at least one first test signal.

[0283] S1318: The power receiving module 1106 sends the received power of at least one first test signal obtained by measurement to the second signal processing module 1107.

[0284] S1319: The second signal processing module 1107 determines the first measurement result based on the received power of at least one first test signal.

[0285] In one optional implementation, after the power receiving module 1106 has measured the received power of at least one first test signal, it sends the received power of at least one first test signal to the second signal processing module 1107. The second signal processing module 1107 determines the largest received power among the received power of at least one first test signal and uses the identifier of the first target test signal with the largest received power as the first indication information. The first measurement result includes the first indication information.

[0286] In another optional implementation, after receiving each first test signal and measuring the received power of the first test signal, the power receiving module 1106 sends the received power of the first test signal to the second signal processing module 1107, and the second signal processing module 1107 uses the received power of the first test signal as the first measurement result.

[0287] S1320: The second signal processing module 1107 sends the first measurement result to the second communication module 1108.

[0288] S1321: The second communication module 1108 sends the first measurement result to the second transceiver antenna 1105.

[0289] S1322: The second transceiver antenna 1105 sends the first measurement result to the first transceiver antenna 1101.

[0290] S1323: The wireless charging device switches switch 1 to the first communication module 1104, and the first transceiver antenna 1101 sends the first measurement result to the first communication module 1104.

[0291] S1324: The first communication module 1104 sends the first measurement result to the first signal processing module 1102.

[0292] S1325: The first signal processing module 1102 selects a waveform parameter from at least one candidate waveform parameter based on the first measurement result.

[0293] S1326: The first signal processing module 1102 sends the waveform parameters to the power signal generation module 1103.

[0294] S1327: Power signal generation module 1103 generates target electromagnetic wave signal based on waveform parameters and channel information.

[0295] S1328: The power signal generation module 1103 sends the target electromagnetic wave signal to the first transceiver antenna 1101.

[0296] S1329: The first transceiver antenna 1101 transmits the target electromagnetic wave signal to the second transceiver antenna 1105.

[0297] S1330: The second transceiver antenna 1105 sends the target electromagnetic wave signal to the power receiving module 1106.

[0298] S1331: The power receiving module 1106 converts the target electromagnetic wave signal into a DC signal and charges the device to be charged according to the DC signal.

[0299] Example 2

[0300] In one optional implementation, the frame structure of the electromagnetic wave signal transmitted between the wireless charging device and the device to be charged in the wireless charging system provided in this application embodiment can be found in [reference needed]. Figure 14 , Figure 14Taking a charging cycle of duration T as an example, a charging cycle includes a target electromagnetic wave signal determination stage and a wireless power transfer stage. In the target electromagnetic wave signal determination stage, the device to be charged sends a beacon signal, and the wireless charging device receives the beacon signal and calculates channel information based on the received beacon signal. The wireless charging device sends at least one first test signal. After receiving at least one first test signal, the device to be charged determines a first measurement result and sends the first measurement result to the wireless charging device. The wireless charging device determines waveform parameters based on the first measurement result and determines the target electromagnetic wave signal based on the channel information and waveform parameters. In the wireless power transfer stage, the wireless charging device sends the target electromagnetic wave signal to the device to be charged. The device to be charged receives the target electromagnetic wave signal, converts the target electromagnetic wave signal into a DC signal, and charges based on the DC signal.

[0301] Figure 15 A flowchart of a wireless charging method provided for Example 2, which includes the following steps:

[0302] S1501: The device to be charged switches switch 2 to the second communication module 1108, and the second communication module 1108 generates a beacon signal.

[0303] S1502: The second communication module 1108 sends the beacon signal to the second transceiver antenna 1105.

[0304] S1503: The second transceiver antenna 1105 sends the beacon signal to the first transceiver antenna 1101.

[0305] S1504: The wireless charging device switches switch 1 to the first communication module 1104, and the first transceiver antenna 1101 sends the beacon signal to the first communication module 1104.

[0306] S1505: The first communication module 1104 sends the beacon signal to the first signal processing module 1102.

[0307] S1506: The first signal processing module 1102 calculates channel information based on the received beacon signal and the beacon signal originally sent by the pre-configured or protocol-agreed wireless charging device.

[0308] S1507: The first signal processing module 1102 sends the channel information to the power signal generation module 1103.

[0309] S1508: The wireless charging device switches switch 1 to power signal generation module 1103, which generates at least one first test signal based on channel information and at least one candidate waveform parameter.

[0310] S1509: The power signal generation module 1103 sends at least one first test signal to the first transceiver antenna 1101.

[0311] S1510: The first transceiver antenna 1101 sends at least one first test signal to the second transceiver antenna 1105.

[0312] S1511: The device to be charged switches switch 2 to power receiving module 1106, and the second transceiver antenna 1105 sends at least one first test signal to power receiving module 1106.

[0313] S1512: The power receiving module 1106 measures the received power of at least one first test signal.

[0314] S1513: The power receiving module 1106 sends the received power of at least one first test signal obtained by measurement to the second signal processing module 1107.

[0315] S1514: The second signal processing module 1107 determines the first measurement result based on the received power of at least one first test signal.

[0316] For details, please refer to [link / reference]. Figure 13 The wireless charging method shown implements the method of determining the first measurement result in step S1319, and the repeated parts will not be described again.

[0317] S1515: The second signal processing module 1107 sends the first measurement result to the second communication module 1108.

[0318] S1516: The second communication module 1108 sends the first measurement result to the second transceiver antenna 1105.

[0319] S1517: The second transceiver antenna 1105 sends the first measurement result to the first transceiver antenna 1101.

[0320] S1518: The wireless charging device switches switch 1 to the first communication module 1104, and the first transceiver antenna 1101 sends the first measurement result to the first communication module 1104.

[0321] S1519: The first communication module 1104 sends the first measurement result to the first signal processing module 1102.

[0322] S1520: The first signal processing module 1102 selects a waveform parameter from at least one candidate waveform parameter based on the first measurement result.

[0323] S1521: The first signal processing module 1102 sends the waveform parameters to the power signal generation module 1103.

[0324] S1522: Power signal generation module 1103 generates target electromagnetic wave signal based on waveform parameters and channel information.

[0325] S1523: The power signal generation module 1103 sends the target electromagnetic wave signal to the first transceiver antenna 1101.

[0326] S1524: The first transceiver antenna 1101 transmits the target electromagnetic wave signal to the second transceiver antenna 1105.

[0327] S1525: The second transceiver antenna 1105 sends the target electromagnetic wave signal to the power receiving module 1106.

[0328] S1526: The power receiving module 1106 converts the target electromagnetic wave signal into a DC signal and charges the device to be charged according to the DC signal.

[0329] Example 3

[0330] In one optional implementation, the frame structure of the electromagnetic wave signal transmitted between the wireless charging device and the device to be charged in the wireless charging system provided in this application embodiment can be found in [reference needed]. Figure 16 , Figure 16 Taking a charging cycle of duration T as an example, a charging cycle includes a target electromagnetic wave signal determination stage and a wireless power transfer stage. In the target electromagnetic wave signal determination stage, the device to be charged sends at least one second test signal. After receiving the at least one second test signal, the device to be charged determines a second measurement result and sends the second measurement result to the wireless charging device. The wireless charging device determines channel information based on the second measurement result. The wireless charging device sends at least one first test signal. After receiving the at least one first test signal, the device to be charged determines a first measurement result and sends the first measurement result to the wireless charging device. The wireless charging device determines waveform parameters based on the first measurement result and determines the target electromagnetic wave signal based on the channel information and waveform parameters. In the wireless power transfer stage, the wireless charging device sends the target electromagnetic wave signal to the device to be charged. The device to be charged receives the target electromagnetic wave signal, converts the target electromagnetic wave signal into a DC signal, and charges the device according to the DC signal.

[0331] Figure 17 A flowchart of a wireless charging method provided for Example 2, which includes the following steps:

[0332] S1701: The wireless charging device switches switch 1 to power signal generation module 1103, which determines at least one second test signal based on at least one candidate channel information.

[0333] S1702: The power signal generation module 1103 sends at least one second test signal to the first transceiver antenna 1101.

[0334] S1703: The first transceiver antenna 1101 sends at least one second test signal to the second transceiver antenna 1105.

[0335] S1704: The device to be charged switches switch 2 to power receiving module 1106, and the second transceiver antenna 1105 sends at least one second test signal to power receiving module 1106.

[0336] S1705: Power receiving module 1106 measures the received power of at least one second test signal.

[0337] S1706: The power receiving module 1106 sends the received power of at least one second test signal obtained from the measurement to the first signal processing module 1102.

[0338] S1707: The first signal processing module 1102 determines the second measurement result based on the received power of at least one second test signal.

[0339] In one optional implementation, after the power receiving module 1106 has measured the received power of at least one second test signal, it sends the received power of at least one second test signal to the second signal processing module 1107. The second signal processing module 1107 determines the largest received power among the received powers of at least one second test signal, and uses the identifier of the second target test signal with the largest received power as second indication information. The second measurement result includes the second indication information.

[0340] In another optional implementation, after receiving each second test signal and measuring the received power of the second test signal, the power receiving module 1106 sends the received power of the second test signal to the second signal processing module 1107, and the second signal processing module 1107 uses the received power of the second test signal as the second measurement result.

[0341] S1708: The first signal processing module 1102 sends the second measurement result to the second communication module 1108.

[0342] S1709: The second communication module 1108 sends the second measurement result to the second transceiver antenna 1105.

[0343] S1710: The second transceiver antenna 1105 sends the second measurement result to the first transceiver antenna 1101.

[0344] S1711: The wireless charging device switches switch 1 to the first communication module 1104, and the first transceiver antenna 1101 sends the second measurement result to the first communication module 1104.

[0345] S1712: The first communication module 1104 sends the second measurement result to the first signal processing module 1102.

[0346] S1713: The first signal processing module 1102 selects channel information from at least one candidate channel information based on the second measurement result.

[0347] S1714: The first signal processing module 1102 sends the channel information to the power signal generation module 1103.

[0348] S1715: The wireless charging device switches switch 1 to power signal generation module 1103, which generates at least one first test signal based on channel information and at least one candidate waveform parameter.

[0349] S1716: The power signal generation module 1103 sends at least one first test signal to the first transceiver antenna 1101.

[0350] S1717: The first transceiver antenna 1101 sends at least one first test signal to the second transceiver antenna 1105.

[0351] S1718: The device to be charged switches switch 2 to power receiving module 1106, and the second transceiver antenna 1105 sends at least one first test signal to power receiving module 1106.

[0352] S1719: The power receiving module 1106 measures the received power of at least one first test signal.

[0353] S1720: The power receiving module 1106 sends the received power of at least one first test signal obtained by measurement to the second signal processing module 1107.

[0354] S1721: The second signal processing module 1107 determines the first measurement result based on the received power of at least one first test signal.

[0355] For details, please refer to [link / reference]. Figure 13 The wireless charging method shown implements the method of determining the first measurement result in step S1319, and the repeated parts will not be described again.

[0356] S1722: The second signal processing module 1107 sends the first measurement result to the second communication module 1108.

[0357] S1723: The second communication module 1108 sends the first measurement result to the second transceiver antenna 1105.

[0358] S1724: The second transceiver antenna 1105 sends the first measurement result to the first transceiver antenna 1101.

[0359] S1725: The wireless charging device switches switch 1 to the first communication module 1104, and the first transceiver antenna 1101 sends the first measurement result to the first communication module 1104.

[0360] S1726: The first communication module 1104 sends the first measurement result to the first signal processing module 1102.

[0361] S1727: The first signal processing module 1102 selects a waveform parameter from at least one candidate waveform parameter based on the first measurement result.

[0362] S1728: The first signal processing module 1102 sends the waveform parameters to the power signal generation module 1103.

[0363] S1729: Power signal generation module 1103 generates target electromagnetic wave signal based on waveform parameters and channel information.

[0364] S1730: The power signal generation module 1103 sends the target electromagnetic wave signal to the first transceiver antenna 1101.

[0365] S1731: The first transceiver antenna 1101 transmits the target electromagnetic wave signal to the second transceiver antenna 1105.

[0366] S1732: The second transceiver antenna 1105 sends the target electromagnetic wave signal to the power receiving module 1106.

[0367] S1733: The power receiving module 1106 converts the target electromagnetic wave signal into a DC signal and charges the device to be charged according to the DC signal.

[0368] Based on the same technical concept, this application also provides a wireless charging device 1800. Figure 18 This is a schematic diagram of the structure of a wireless charging device 1800 provided in an embodiment of this application. The wireless charging device 1800 can be... Figure 1 The wireless charging device in the wireless charging system shown can achieve Figure 4 , Figure 13 , Figure 15 , Figure 17 The function of the wireless charging device in the wireless charging method shown. (See also...) Figure 18As shown, the wireless charging device 1800 includes a transceiver antenna 1801 and a processor 1802. Optionally, it may also include a memory 1803. The transceiver antenna 1801, the processor 1802, and the memory 1803 are interconnected. It should be noted that the wireless charging device 1800 may include at least one processor 1802 and at least one memory 1803. Figure 18 The wireless charging device 1800 is illustrated as an example, comprising a processor 1802 and a memory 1803.

[0369] The transceiver antenna 1801 is used to receive and transmit signals to enable communication and interaction with other devices. For example, the transceiver antenna 1801 may be a transceiver antenna array including at least one transceiver antenna.

[0370] The memory 1803 is used to store instructions, and the processor 1802 is used to execute the instructions stored in the memory 1803. The memory 1803 stores program code, and the processor 1802 can call the program code stored in the memory 1803 to execute the wireless charging method provided in this application embodiment.

[0371] The processor 1802 is used to acquire channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal within a charging cycle; wherein, the transmission channel is the channel between the wireless charging device and the device to be charged at a first frequency point, and the channel information includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel; generate a target electromagnetic wave signal according to the channel information and the waveform parameters, and transmit the target electromagnetic wave signal to the device to be charged through the transmission channel via the transceiver antenna 1801.

[0372] In one embodiment, when the processor 1802 acquires waveform parameters for indicating the waveform of an electromagnetic wave signal, it specifically selects the waveform parameter from at least one preset candidate waveform parameters.

[0373] In one embodiment, when the processor 1802 selects the waveform parameter from at least one preset candidate waveform parameters, it is specifically used to:

[0374] At least one first test signal is transmitted to the device to be charged via the transmission channel through the transceiver antenna 1801; wherein, the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and each first test signal is generated based on the corresponding candidate waveform parameter; a first measurement result transmitted by the device to be charged is received via the transmission channel through the transceiver antenna 1801; the first measurement result is obtained by the device to be charged from measuring the signal quality of the at least one first test signal; and the waveform parameter is selected from the at least one candidate waveform parameter based on the first measurement result.

[0375] In one embodiment, the first measurement result includes the signal quality of the at least one first test signal; the processor 1802, when selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result, specifically performs the following: determining the first target test signal with the highest signal quality based on the signal quality of the at least one first test signal included in the first measurement result; and determining the candidate waveform parameter corresponding to the first target test signal as the waveform parameter from the at least one candidate waveform parameters.

[0376] Alternatively, the first measurement result may contain first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals; the processor 1802, when selecting the waveform parameter from the at least one candidate waveform parameters according to the first measurement result, is specifically used to: determine the first target test signal indicated by the first indication information; and determine the candidate waveform parameter corresponding to the first target test signal as the waveform parameter among the at least one candidate waveform parameters.

[0377] In one embodiment, when the processor 1802 acquires the channel information of the transmission channel, it is specifically used to: perform a channel measurement process on the transmission channel to acquire the channel information; or select the channel information from at least one preset candidate channel information.

[0378] In one embodiment, when the processor 1802 performs a channel measurement process on the transmission channel and acquires the channel information, it is specifically configured to: send a beacon signal to the device to be charged through the transmission channel via the transceiver antenna 1801, the beacon signal being used by the device to be charged to perform channel measurement; and receive the channel information sent by the device to be charged through the transmission channel via the transceiver antenna 1801.

[0379] In one embodiment, when the processor 1802 performs a channel measurement process on the transmission channel to obtain the channel information, it is specifically used to: receive the beacon signal sent by the device to be charged through the transmission channel via the transceiver antenna 1801, and perform channel measurement based on the beacon signal to obtain the channel information.

[0380] In one embodiment, when the processor 1802 selects the channel information from at least one preset candidate channel information, it is specifically configured to: transmit the at least one second test signal to the device to be charged through the transmission channel via the transceiver antenna 1801; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; receive the second measurement result transmitted by the device to be charged through the transmission channel via the transceiver antenna 1801; the second measurement result is obtained by the device to be charged measuring the signal quality of the at least one second test signal; and select the channel information from the at least one candidate channel information based on the second measurement result.

[0381] In one embodiment, the second measurement result includes the signal quality of the at least one second test signal; the processor 1802, when selecting the channel information from the at least one candidate channel information based on the second measurement result, is specifically configured to: determine the second target test signal with the highest signal quality based on the signal quality of the at least one second test signal included in the second measurement result; and determine the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information; or the second measurement result includes second indication information, the second indication information being used to indicate the second target test signal with the highest signal quality from the at least one second test signal; the processor 1802, when selecting the channel information from the at least one candidate channel information based on the second measurement result, is specifically configured to: determine the second target test signal indicated by the second indication information; and determine the candidate channel information corresponding to the second target test signal as the channel information from the at least one candidate channel information.

[0382] In one embodiment, the waveform parameter is an exponential factor that performs an exponential operation on the signal attenuation in the channel information during the generation of the target electromagnetic wave signal.

[0383] In one embodiment, the target electromagnetic wave signal satisfies the following formula:

[0384]

[0385] Where n represents the first frequency point, w n This represents the target electromagnetic wave signal. A represents the transmission delay included in the channel information. n The channel information represents the signal attenuation, P is the total transmit power of the wireless charging device, and β is the waveform parameter.

[0386] In one embodiment, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna in the wireless charging device and a receiving antenna in the device to be charged.

[0387] In one embodiment, the processor 1802 is further configured to: receive charging request information sent by the device to be charged through the transmission channel via the transceiver antenna 1801 before acquiring channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal.

[0388] Based on the same technical concept, this application also provides a device to be charged 1900. Figure 19 This is a schematic diagram of the structure of a device 1900 to be charged according to an embodiment of this application. The device 1900 to be charged can be... Figure 1 The device to be charged in the wireless charging system shown can achieve Figure 4 , Figure 13 , Figure 15 , Figure 17 The function of the device to be charged in the wireless charging method shown. (See also...) Figure 19 As shown, the device to be charged 1900 includes a transceiver antenna 1901 and a processor 1902. Optionally, it may also include a memory 1903. The transceiver antenna 1901, the processor 1902, and the memory 1903 are interconnected. It should be noted that the device to be charged 1900 may include at least one processor 1902 and at least one memory 1903. Figure 19 The example shown is that the device to be charged 1900 includes a processor 1902 and a memory 1903.

[0389] The transceiver antenna 1901 is used to receive and transmit signals to enable communication and interaction with other devices. For example, the transceiver antenna 1901 may be a transceiver antenna array including at least one transceiver antenna.

[0390] The memory 1903 is used to store instructions, and the processor 1902 is used to execute the instructions stored in the memory 1903. The memory 1903 stores program code, and the processor 1902 can call the program code stored in the memory 1903 to execute the wireless charging method provided in this application embodiment.

[0391] The processor 1902 is used to receive a target electromagnetic wave signal sent by the wireless charging device through the transmission channel via the transceiver antenna 1901; the target electromagnetic wave signal is generated by the wireless charging device based on the channel information of the transmission channel and the waveform parameters used to indicate the waveform of the electromagnetic wave signal; the processor converts the target electromagnetic wave signal into a DC signal and charges the device according to the DC signal.

[0392] In one embodiment, the processor 1902 is further configured to: receive at least one first test signal transmitted by the wireless charging device through the transmission channel via the transceiver antenna 1901; wherein the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and any one first test signal is generated based on the corresponding candidate waveform parameter; measure the signal quality of the at least one first test signal; generate a first measurement result based on the signal quality of the at least one first test signal; and transmit the first measurement result to the wireless charging device through the transmission channel via the transceiver antenna 1901, so that the wireless charging device selects the waveform parameter from the at least one candidate waveform parameter based on the first measurement result.

[0393] In one embodiment, the first measurement result includes the signal quality of the at least one first test signal; or the first measurement result includes first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals.

[0394] In one embodiment, the processor 1902 is further configured to: receive a beacon signal transmitted by the wireless charging device through the transmission channel via the transceiver antenna 1901; perform channel measurement based on the beacon signal to obtain the channel information; and transmit the channel information to the wireless charging device through the transmission channel via the transceiver antenna 1901.

[0395] In one embodiment, the processor 1902 is further configured to: transmit a beacon signal to the wireless charging device via the transceiver antenna 1901, the beacon signal being used by the wireless charging device to perform channel measurements.

[0396] In one embodiment, the processor 1902 is further configured to: receive at least one second test signal transmitted by the wireless charging device via the transceiver antenna 1901; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; measure the signal quality of each of the at least one second test signals; generate a second measurement result based on the signal quality of the at least one second test signal; and transmit the second measurement result to the wireless charging device via the transceiver antenna 1901, so that the wireless charging device selects the channel information from the at least one candidate channel information based on the second measurement result.

[0397] In one embodiment, the second measurement result includes the signal quality of the at least one second test signal; or the second measurement result includes second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signals.

[0398] In one embodiment, the transmission channel corresponds to a set of transceiver antennas, which consists of a transmitting antenna in the wireless charging device and a receiving antenna in the device to be charged.

[0399] In one embodiment, the processor 1902 is further configured to: determine that the current battery level is greater than or equal to the battery level required to send the charging request information; and send the charging request information to the wireless charging device via the transmission channel through the transceiver antenna 1901.

[0400] It is understood that this application Figure 18 and Figure 19The memory in the memory can be volatile or non-volatile, or a combination of both. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate Synchronous DRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0401] In the wireless charging system provided in this application embodiment, the wireless charging device can determine channel information, including signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel, and waveform parameters indicating the waveform of the electromagnetic wave signal within one charging cycle. Then, it can determine the target electromagnetic wave signal based on the channel information and waveform parameters, ensuring that the determined target electromagnetic wave signal can adapt to channel transmission and improving the power conversion efficiency of wireless charging. Compared to existing technologies, this method does not rely on known channel information or the hardware design structure information of the device to be charged; it only needs to determine the channel information and waveform parameters in real time within one charging cycle, improving the practicality of the wireless charging method.

[0402] For example, the wireless charging method provided in this application embodiment can be used to charge devices with different rectifier structures. Figure 20a This diagram illustrates the structure of the first type of device to be charged and shows the DC received power corresponding to different candidate waveform parameters when wirelessly charging the device. Figure 20aIt can be seen that by determining the waveform parameter β=∞ corresponding to the first type of device to be charged, the DC receiving power of the target electromagnetic wave signal determined by the waveform parameter can be increased by more than 200%. Figure 20b This diagram illustrates the structure of the second type of device to be charged and shows the DC received power corresponding to different candidate waveform parameters when wirelessly charging this device. Figure 20b It can be seen that by determining the waveform parameter β=5 for the second type of device to be charged, the DC receiving power of the target electromagnetic wave signal determined using the waveform parameter can also be increased by more than 200%. From the above effects, it can be seen that the wireless charging method provided in this application is suitable for determining the corresponding target electromagnetic wave signal for various devices to be charged and wirelessly charging them. It can determine the optimal waveform of the target electromagnetic wave signal used for wireless charging without prior knowledge of the hardware design structure of the device to be charged, effectively improving the power conversion efficiency of wireless charging.

[0403] Those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A wireless charging system, characterized in that, The wireless charging system includes: a wireless charging device and a device to be charged; wherein... The wireless charging device is used for: During a charging cycle, channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal are acquired; wherein, the transmission channel is the channel between the wireless charging device and the device to be charged at a first frequency point, and the channel information includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel. A target electromagnetic wave signal is generated based on the channel information and the waveform parameters, and the target electromagnetic wave signal is sent to the device to be charged through the transmission channel. The device to be charged is used for: The target electromagnetic wave signal sent by the wireless charging device is received through the transmission channel; The target electromagnetic wave signal is converted into a DC signal, and charging is performed according to the DC signal.

2. The wireless charging system as described in claim 1, characterized in that, When the wireless charging device acquires waveform parameters used to indicate the waveform of the electromagnetic wave signal, it is specifically used for: The waveform parameter is selected from at least one preset candidate waveform parameter.

3. The wireless charging system as described in claim 2, characterized in that, When the wireless charging device selects the waveform parameter from at least one preset candidate waveform parameters, it is specifically used for: At least one first test signal is sent to the device to be charged through the transmission channel; wherein, the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and each first test signal is generated based on the corresponding candidate waveform parameter; The first measurement result sent by the device to be charged is received through the transmission channel; the first measurement result is obtained by the device to be charged measuring the signal quality of the at least one first test signal; Based on the first measurement result, the waveform parameter is selected from the at least one candidate waveform parameters; The device to be charged is also used for: Receive the at least one first test signal sent by the wireless charging device through the transmission channel; Measure the signal quality of the at least one first test signal; The first measurement result is generated based on the signal quality of the at least one first test signal, and the first measurement result is sent to the wireless charging device through the transmission channel.

4. The wireless charging system as described in claim 3, characterized in that, The first measurement result includes the signal quality of the at least one first test signal; the wireless charging device, when selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result, is specifically used for: Based on the signal quality of at least one first test signal included in the first measurement result, a first target test signal with the highest signal quality is determined; among the at least one candidate waveform parameters, the candidate waveform parameter corresponding to the first target test signal is determined as the waveform parameter; or The first measurement result includes first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals; the wireless charging device, when selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result, is specifically used for: The first target test signal indicated by the first indication information is determined; among the at least one candidate waveform parameters, the candidate waveform parameter corresponding to the first target test signal is determined as the waveform parameter.

5. The wireless charging system according to any one of claims 1 to 4, characterized in that, When acquiring channel information of the transmission channel, the wireless charging device is specifically used for: Perform a channel measurement process on the transmission channel to obtain the channel information; or The channel information is selected from at least one preset candidate channel information.

6. The wireless charging system as described in claim 5, characterized in that, When the wireless charging device performs a channel measurement process on the transmission channel to obtain the channel information, it is specifically used for: A beacon signal is sent to the device to be charged through the transmission channel, and the beacon signal is used by the device to be charged to perform channel measurement. The channel information sent by the device to be charged is received through the transmission channel; The device to be charged is also used for: The beacon signal sent by the wireless charging device is received through the transmission channel, and channel measurement is performed based on the beacon signal to obtain the channel information; The channel information is sent to the wireless charging device through the transmission channel.

7. The wireless charging system as described in claim 5, characterized in that, The device to be charged is also used for: A beacon signal is sent to the wireless charging device through the transmission channel, and the beacon signal is used by the wireless charging device to perform channel measurement. When the wireless charging device performs a channel measurement process on the transmission channel to obtain the channel information, it is specifically used for: The beacon signal sent by the device to be charged is received through the transmission channel, and channel measurement is performed based on the beacon signal to obtain the channel information.

8. The wireless charging system as described in claim 5, characterized in that, When the wireless charging device selects the channel information from at least one preset candidate channel information, it is specifically used for: The at least one second test signal is sent to the device to be charged through the transmission channel; wherein, the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; The second measurement result sent by the device to be charged is received through the transmission channel; the second measurement result is obtained by the device to be charged from measuring the signal quality of the at least one second test signal; Based on the second measurement result, the channel information is selected from the at least one candidate channel information; The device to be charged is also used for: Receive the at least one second test signal sent by the wireless charging device through the transmission channel; Measure the signal quality of each of the at least one second test signal; The second measurement result is generated based on the signal quality of the at least one second test signal, and the second measurement result is sent to the wireless charging device through the transmission channel.

9. The wireless charging system as described in claim 8, characterized in that, The second measurement result includes the signal quality of the at least one second test signal; the wireless charging device, when selecting the channel information from the at least one candidate channel information based on the second measurement result, is specifically used for: Based on the signal quality of the at least one second test signal included in the second measurement result, a second target test signal with the highest signal quality is determined; among the at least one candidate channel information, the candidate channel information corresponding to the second target test signal is determined as the channel information; or The second measurement result includes second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signals; the wireless charging device, when selecting the channel information from the at least one candidate channel information based on the second measurement result, is specifically used for: The second target test signal indicated by the second indication information is determined; among the at least one candidate channel information, the candidate channel information corresponding to the second target test signal is determined as the channel information.

10. The wireless charging system as described in any one of claims 1-4 and 6-9, characterized in that, The waveform parameter is an exponential factor used to perform an exponential operation on the signal attenuation in the channel information during the generation of the target electromagnetic wave signal.

11. The wireless charging system as described in claim 10, characterized in that, The target electromagnetic wave signal satisfies the following formula: Where n represents the first frequency point, This represents the target electromagnetic wave signal. This indicates the transmission delay included in the channel information. This indicates the signal attenuation contained in the channel information, where P is the total transmit power of the wireless charging device. The waveform parameters are as described above.

12. The wireless charging system as described in any one of claims 1-4, 6-9, and 11, characterized in that, The transmission channel corresponds to a set of transceiver antenna combinations, which consist of a transmitting antenna in the wireless charging device and a receiving antenna in the device to be charged.

13. The wireless charging system as described in any one of claims 1-4, 6-9, and 11, characterized in that, The wireless charging device is also used for: Before acquiring the channel information of the transmission channel and the waveform parameters used to indicate the electromagnetic wave signal waveform, the charging request information sent by the device to be charged is received through the transmission channel. The device to be charged is also used for: If the current battery level is determined to be greater than or equal to the battery level required to send the charging request information, the charging request information is sent to the wireless charging device through the transmission channel.

14. A wireless charging device, characterized in that, It includes a signal processing module, a power signal generation module, and at least one transceiver antenna; The signal processing module is used to acquire channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal within a charging cycle; wherein, the transmission channel is the channel between the wireless charging device and the device to be charged at a first frequency point, and the channel information includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel. The power signal generation module is used to generate a target electromagnetic wave signal based on the channel information and the waveform parameters. The at least one transceiver antenna is used to transmit the target electromagnetic wave signal to the device to be charged through the transmission channel.

15. The wireless charging device as described in claim 14, characterized in that, When the signal processing module acquires waveform parameters used to indicate the waveform of the electromagnetic wave signal, it specifically performs the following: The waveform parameter is selected from at least one preset candidate waveform parameter.

16. The wireless charging device as described in claim 15, characterized in that, The at least one transceiver antenna is also used for: At least one first test signal is sent to the device to be charged through the transmission channel; wherein, the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and each first test signal is generated based on the corresponding candidate waveform parameter; The first measurement result sent by the device to be charged is received through the transmission channel; the first measurement result is obtained by the device to be charged measuring the signal quality of the at least one first test signal; When the signal processing module selects the waveform parameter from at least one preset candidate waveform parameters, it is specifically used for: Based on the first measurement result, the waveform parameter is selected from the at least one candidate waveform parameters.

17. The wireless charging device as described in claim 16, characterized in that, The first measurement result includes the signal quality of at least one first test signal; the signal processing module, when selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result, is specifically used for: Based on the signal quality of at least one first test signal included in the first measurement result, a first target test signal with the highest signal quality is determined; among the at least one candidate waveform parameters, the candidate waveform parameter corresponding to the first target test signal is determined as the waveform parameter; or The first measurement result includes first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signals; the signal processing module, when selecting the waveform parameter from the at least one candidate waveform parameters based on the first measurement result, is specifically used for: The first target test signal indicated by the first indication information is determined; among the at least one candidate waveform parameters, the candidate waveform parameter corresponding to the first target test signal is determined as the waveform parameter.

18. The wireless charging device according to any one of claims 14 to 17, characterized in that, When the signal processing module acquires the channel information of the transmission channel, it is specifically used for: Perform a channel measurement process on the transmission channel to obtain the channel information; or The channel information is selected from at least one preset candidate channel information.

19. The wireless charging device as claimed in claim 18, characterized in that, The at least one transceiver antenna is also used for: A beacon signal is sent to the device to be charged through the transmission channel, and the beacon signal is used by the device to be charged to perform channel measurement. The channel information sent by the device to be charged is received through the transmission channel.

20. The wireless charging device as described in claim 18, characterized in that, The at least one transceiver antenna is also used for: The beacon signal sent by the device to be charged is received through the transmission channel; When the signal processing module performs a channel measurement process on the transmission channel and acquires the channel information, it is specifically used for: Channel information is obtained by performing channel measurements based on the beacon signal.

21. The wireless charging device as described in claim 18, characterized in that, The at least one transceiver antenna is also used for: At least one second test signal is sent to the device to be charged through the transmission channel; wherein, the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; The second measurement result sent by the device to be charged is received through the transmission channel; the second measurement result is obtained by the device to be charged from measuring the signal quality of the at least one second test signal; When selecting channel information from at least one preset candidate channel information, the signal processing module is specifically used for: Based on the second measurement result, the channel information is selected from the at least one candidate channel information.

22. The wireless charging device as claimed in claim 21, characterized in that, The second measurement result includes the signal quality of the at least one second test signal; the signal processing module, when selecting the channel information from the at least one candidate channel information based on the second measurement result, is specifically used for: Based on the signal quality of the at least one second test signal included in the second measurement result, a second target test signal with the highest signal quality is determined; among the at least one candidate channel information, the candidate channel information corresponding to the second target test signal is determined as the channel information; or The second measurement result includes second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signal; the signal processing module, when selecting the channel information from the at least one candidate channel information based on the second measurement result, is specifically used for: The second target test signal indicated by the second indication information is determined; among the at least one candidate channel information, the candidate channel information corresponding to the second target test signal is determined as the channel information.

23. The wireless charging device as described in any one of claims 14-17 and 19-22, characterized in that, The waveform parameter is an exponential factor used to perform an exponential operation on the signal attenuation in the channel information during the generation of the target electromagnetic wave signal.

24. The wireless charging device as described in claim 23, characterized in that, The target electromagnetic wave signal satisfies the following formula: Where n represents the first frequency point, This represents the target electromagnetic wave signal. This indicates the transmission delay included in the channel information. This indicates the signal attenuation contained in the channel information, where P is the total transmit power of the wireless charging device. The waveform parameters are as described above.

25. The wireless charging device as described in any one of claims 14-17, 19-22, and 24, characterized in that, The transmission channel corresponds to a set of transceiver antenna combinations, which consist of a transmitting antenna in the wireless charging device and a receiving antenna in the device to be charged.

26. The wireless charging device as described in any one of claims 14-17, 19-22, and 24, characterized in that, The at least one transceiver antenna is also used for: Before the signal processing module acquires the channel information of the transmission channel and the waveform parameters used to indicate the electromagnetic wave signal waveform, it receives the charging request information sent by the device to be charged through the transmission channel.

27. A device to be charged, characterized in that, Includes at least one transceiver antenna and a power receiving module; The at least one transceiver antenna is used to receive target electromagnetic wave signals sent by the wireless charging device through the transmission channel during one charging cycle. The target electromagnetic wave signal is generated by the wireless charging device based on the channel information of the transmission channel and the waveform parameters used to indicate the waveform of the electromagnetic wave signal. The channel information of the transmission channel includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel. The power receiving module is used to convert the target electromagnetic wave signal into a DC signal and charge the device according to the DC signal.

28. The device to be charged as claimed in claim 27, characterized in that, The at least one transceiver antenna is also used for: The transmission channel receives at least one first test signal sent by the wireless charging device; wherein, the at least one first test signal corresponds one-to-one with the at least one candidate waveform parameter, and each first test signal is generated based on the corresponding candidate waveform parameter; The wireless charging device sends a first measurement result through the transmission channel, so that the wireless charging device selects the waveform parameter from the at least one candidate waveform parameter according to the first measurement result. The power receiving module is also used to: measure the signal quality of the at least one first test signal; The device to be charged further includes a signal processing module, which is used to generate the first measurement result based on the signal quality of the at least one first test signal.

29. The device to be charged as described in claim 28, characterized in that, The first measurement result includes the signal quality of at least one of the first test signals; or The first measurement result includes first indication information, which is used to indicate the first target test signal with the highest signal quality among the at least one first test signal.

30. The device to be charged as described in claim 28 or 29, characterized in that, The at least one transceiver antenna is also used for: Receive beacon signals sent by the wireless charging device through the transmission channel; send channel information to the wireless charging device through the transmission channel; The signal processing module is also used for: Channel information is obtained by performing channel measurements based on the beacon signal.

31. The device to be charged as described in claim 28 or 29, characterized in that, The at least one transceiver antenna is also used for: A beacon signal is sent to the wireless charging device through the transmission channel, and the beacon signal is used by the wireless charging device to perform channel measurement.

32. The device to be charged as described in claim 28 or 29, characterized in that, The at least one transceiver antenna is also used for: The transmission channel receives at least one second test signal sent by the wireless charging device; wherein the at least one second test signal corresponds one-to-one with the at least one candidate channel information, and each second test signal is generated based on the corresponding candidate channel information; The second measurement result is sent to the wireless charging device through the transmission channel, so that the wireless charging device selects the channel information from the at least one candidate channel information according to the second measurement result; The power receiving module is also used to: measure the signal quality of each of the at least one second test signal; The signal processing module is further configured to: generate the second measurement result based on the signal quality of the at least one second test signal.

33. The device to be charged as described in claim 32, characterized in that, The second measurement result includes the signal quality of at least one of the second test signals; or The second measurement result includes second indication information, which is used to indicate the second target test signal with the highest signal quality among the at least one second test signal.

34. The device to be charged as described in any one of claims 27-29 and 33, characterized in that, The transmission channel corresponds to a set of transceiver antenna combinations, which consist of a transmitting antenna in the wireless charging device and a receiving antenna in the device to be charged.

35. The device to be charged as described in any one of claims 28-29 and 33, characterized in that, The signal processing module is also used for: Determine if the current battery level is greater than or equal to the battery level required to send the charging request message; The at least one transceiver antenna is also used for: The charging request information is sent to the wireless charging device through the transmission channel.

36. A wireless charging device, characterized in that, It includes a processor and a transceiver antenna, the processor being configured to read instructions to perform the functions of the wireless charging device in any one of claims 1-13 wireless charging systems.

37. A device to be charged, characterized in that, It includes a processor and a transceiver antenna, the processor being configured to read instructions to perform the functions of the device to be charged in the wireless charging system of any one of claims 1-13.

38. A wireless charging method, applied to a wireless charging device, characterized in that, The method includes: During a charging cycle, channel information of the transmission channel and waveform parameters for indicating the waveform of the electromagnetic wave signal are acquired; wherein, the transmission channel is the channel between the wireless charging device and the device to be charged at a first frequency point, and the channel information includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel. A target electromagnetic wave signal is generated based on the channel information and the waveform parameters, and the target electromagnetic wave signal is sent to the device to be charged through the transmission channel, so that the device to be charged converts the target electromagnetic wave signal into a DC signal and charges according to the DC signal.

39. A wireless charging method, applied to a device to be charged, characterized in that, The method includes: During a charging cycle, the target electromagnetic wave signal sent by the wireless charging device is received through the transmission channel; the target electromagnetic wave signal is generated by the wireless charging device based on the channel information of the transmission channel and the waveform parameters used to indicate the waveform of the electromagnetic wave signal. The channel information of the transmission channel includes the signal attenuation and transmission delay of the electromagnetic wave signal transmitted through the transmission channel. The target electromagnetic wave signal is converted into a DC signal, and charging is performed according to the DC signal.

Images