Energy transfer method and apparatus

Abstract

This application provides a power transmission method and apparatus that can synchronize multiple power transmission devices based on a power receiving device, thereby improving power transmission efficiency. The method includes: a power receiving device sending a power transmission request signal to multiple power transmission devices; the power receiving device receiving response signals from the multiple power transmission devices in response to the power transmission request signal; the power receiving device acquiring amplitude and phase information of the multiple power transmission devices based on the response signals; and the power receiving device sending a synchronization signal to the multiple power transmission devices based on the amplitude and phase information, wherein the synchronization signal synchronizes the amplitude and phase of the multiple power transmission devices.

Description

Technical Field

[0001] This application relates to the field of wireless charging, and more specifically, to a power transmission method and apparatus. Background Technology

[0002] Wireless power transfer (WPT) technology enables electronic devices to access energy instantly, greatly improving user convenience. Common WPT technologies include magnetic induction charging, magnetic resonance charging, and microwave wireless charging. Currently commercially available wireless charging products, such as wireless charging pads for mobile phones, are based on magnetic induction or magnetic resonance technology. While magnetic induction or magnetic resonance technologies offer high transmission efficiency, they suffer from very short charging distances, typically limited to contact charging or millimeter-level distances. Furthermore, they require precise positioning and orientation of the transmitting and receiving coils, significantly restricting charging convenience and application scope, and failing to support large-scale, multi-terminal, and mobile charging. Microwave power transfer (MPT) technology, on the other hand, offers significant advantages in coverage, multi-terminal support, and mobility. However, due to the omnidirectional nature of microwave radiation, energy is difficult to focus, resulting in lower effective charging power.

[0003] The key to energy focusing is the equivalent antenna array aperture of the power transmission equipment. To achieve good energy focusing, a large antenna array is typically required; however, large antenna arrays are difficult to install and deploy. Using multiple small, distributed power transmission devices (small array power transmission circuits can be integrated into devices such as wireless routers, speakers, and televisions) for joint power transmission can achieve a larger equivalent array aperture, resulting in better focusing performance, while also simplifying deployment. However, because different devices have different crystal oscillator clocks, the inherent frequency deviation and drift deviation of the clocks can lead to asynchrony between the devices. Therefore, the key to distributed power transmission lies in the synchronization between multiple power transmission and receiving devices. Summary of the Invention

[0004] This application provides an energy transmission method and apparatus that can achieve synchronization among multiple energy transmission devices based on the energy receiving device, thereby improving energy transmission efficiency.

[0005] In a first aspect, a method for transmitting power is provided, comprising: a power receiving device sending a power transmission request signal to a plurality of power transmitting devices; the power receiving device receiving response signals from the plurality of power transmitting devices in response to the power transmission request signal; the power receiving device acquiring amplitude and phase information of the plurality of power transmitting devices based on the response signals; and the power receiving device sending a synchronization signal to the plurality of power transmitting devices based on the amplitude and phase information of the plurality of power transmitting devices, wherein the synchronization signal enables the amplitude and phase of the plurality of power transmitting devices to be synchronized.

[0006] Compared with the prior art, the energy transmission method of this application embodiment can realize the amplitude and phase synchronization between multiple energy transmission devices according to the energy receiving device, so that the energy of multiple energy transmission devices can achieve high-efficiency energy focusing when it reaches the energy receiving device, thereby improving the energy transmission efficiency.

[0007] In this embodiment, the interaction between the power receiving device and multiple power transmitting devices, as well as the amplitude and phase synchronization between the multiple power transmitting devices and the power receiving device, can be performed during the power transmission process. Before amplitude and phase synchronization is completed, each power transmitting device can transmit power independently. After amplitude and phase synchronization is completed, multiple power transmitting devices can achieve efficient joint power transmission. In actual power transmission, the clock frequencies of different devices may drift, and amplitude and phase synchronization needs to be performed periodically. The power transmission method in this embodiment ensures that energy transmission is not interrupted due to the amplitude and phase synchronization process between multiple power transmitting devices and the power receiving device. When the power receiving device detects amplitude and phase asynchrony, it will initiate the amplitude and phase synchronization process during the power transmission process.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, before the power receiving device sends a synchronization signal to multiple power transmitting devices based on the amplitude and phase information of multiple power transmitting devices, the method further includes: the power receiving device detecting whether the power transmitting antennas within the power transmitting devices have completed synchronization based on the amplitude and phase information of each power transmitting device.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, if the receiving device detects that the power transmission antennas within the power transmission device have completed synchronization, the method further includes: the receiving device sending a synchronization signal to the multiple power transmission devices based on the amplitude and phase information of the multiple power transmission devices, wherein the synchronization signal enables the amplitude and phase of the multiple power transmission devices to be synchronized.

[0010] In this embodiment, amplitude and phase synchronization of multiple power transmission devices should be performed only after the multiple power transmission antennas within each power transmission device have already achieved amplitude and phase synchronization. Once the multiple power transmission antennas within each power transmission device have achieved amplitude and phase synchronization, the energy emitted by that antenna can be focused at the receiving antenna with high efficiency. Then, by synchronizing the amplitude and phase of the multiple power transmission devices, the energy focusing at the receiving antenna can achieve high efficiency.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, if the receiving device detects that the power transmission antennas in any one or more of the power transmission devices have not been synchronized, the method further includes: the receiving device sending a power transmission request signal to the power transmission devices again.

[0012] If at least one of the power transmission devices has not yet achieved synchronization among its power transmission antennas, the receiving device continues to send power transmission request signals to the power transmission devices until each power transmission device achieves amplitude synchronization of its multiple power transmission antennas based on the power transmission request signals.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, the power receiving device sends a synchronization signal to the multiple power transmitting devices based on the amplitude and phase information of the multiple power transmitting devices, including: if the power receiving device detects that the multiple power transmitting devices have not completed synchronization based on the amplitude and phase information of the multiple power transmitting devices, then the power receiving device sends a synchronization signal to the multiple power transmitting devices.

[0014] The receiving device detects the amplitude and phase information of multiple transmitting devices to determine whether the multiple transmitting devices have achieved amplitude and phase synchronization. If the multiple transmitting devices have not yet achieved amplitude and phase synchronization, the receiving device sends a synchronization signal to the multiple transmitting devices to instruct them to perform amplitude and phase control.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the instruction information of the power receiving device for amplitude and phase control of each power transmission device.

[0016] The receiving device can send the same synchronization signal to each transmitting device. The synchronization signal contains the equivalent amplitude and phase information and the corresponding identity information of each transmitting device. The transmitting device can find the corresponding equivalent amplitude and phase information based on the identity information, and adjust the amplitude and phase of multiple transmitting antennas in the device according to the equivalent amplitude and phase information to achieve amplitude and phase synchronization between multiple transmitting devices.

[0017] Secondly, a method for transmitting power is provided, comprising: a power transmitting device receiving a power transmitting request signal sent by a power receiving device; the power transmitting device performing a first amplitude-phase modulation on a power transmitting antenna within the power transmitting device according to the power transmitting request signal, thereby synchronizing the amplitude and phase among the power transmitting antennas within the power transmitting device; the power transmitting device sending a response signal to the power receiving device in response to the power transmitting request signal, the response signal being used to instruct the power receiving device on the amplitude and phase after modulation by the power transmitting device; the power transmitting device receiving a synchronization signal sent by the power receiving device according to the response signal; and the power transmitting device performing a second amplitude-phase modulation according to the synchronization signal to achieve amplitude-phase synchronization with other power transmitting devices jointly transmitting power to the power receiving device.

[0018] The power transmission method provided in the first aspect of this application is a power transmission method executed on the power receiving device side, and the power transmission method provided in the second aspect is a power transmission method executed on the corresponding power transmission device side. Similarly, in the process of multiple power transmission devices transmitting power to a power receiving device, each power transmission device performs amplitude and phase synchronization of multiple power transmission antennas within the device according to the instructions of the power receiving device, or performs amplitude and phase synchronization between devices, so as to achieve high-efficiency energy focusing of the energy of multiple power transmission devices at the power receiving device, thereby improving power transmission efficiency.

[0019] In conjunction with the second aspect, in some implementations of the second aspect, the synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the indication information of the power transmission device for amplitude and phase control.

[0020] Thirdly, a power transmission device is provided, which is disposed in a power receiving device, comprising: a transceiver unit for sending a power transmission request signal to a plurality of power transmission devices; the transceiver unit for receiving response signals from the plurality of power transmission devices in response to the power transmission request signal; a control unit for acquiring amplitude and phase information of the plurality of power transmission devices based on the response signals; the control unit and the transceiver unit for sending a synchronization signal to the plurality of power transmission devices based on the amplitude and phase information of the plurality of power transmission devices, wherein the synchronization signal enables the amplitude and phase of the plurality of power transmission devices to be synchronized.

[0021] In conjunction with the third aspect, in some implementations of the third aspect, before sending a synchronization signal to multiple power transmission devices based on the amplitude and phase information of multiple power transmission devices, the control unit is also used to: detect whether the power transmission antennas within each power transmission device have completed synchronization based on the amplitude and phase information of each power transmission device.

[0022] In conjunction with the third aspect, in some implementations of the third aspect, if the control unit detects that the power transmission antennas in each power transmission device have completed synchronization, the control unit controls the transceiver unit to send synchronization signals to the multiple power transmission devices based on the amplitude and phase information of the multiple power transmission devices. The synchronization signals enable the amplitude and phase of the multiple power transmission devices to be synchronized.

[0023] In conjunction with the third aspect, in some implementations of the third aspect, if the control unit detects that the power transmission antennas in any one or more of the power transmission devices have not been synchronized, the transceiver unit sends a power transmission request signal to the power transmission devices again.

[0024] In conjunction with the third aspect, in some implementations of the third aspect, a synchronization signal is sent to multiple power transmission devices based on the amplitude and phase information of multiple power transmission devices. Specifically, the control unit and the transceiver unit are used to send a synchronization signal to multiple power transmission devices when the control unit detects that the multiple power transmission devices have not completed synchronization based on the amplitude and phase information of multiple power transmission devices.

[0025] In conjunction with the third aspect, in some implementations of the third aspect, the synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the instruction information of the control unit for amplitude and phase control of each power transmission device.

[0026] Fourthly, a power transmission device is provided, which is disposed in a power transmission equipment and includes: a transceiver unit for receiving a power transmission request signal sent by a power receiving device; a control unit for performing a first amplitude-phase modulation on the power transmission antennas in the power transmission equipment according to the power transmission request signal, so that the amplitude-phase of the power transmission antennas in the power transmission equipment is synchronized; the transceiver unit is further configured to send a response signal to the power receiving device in response to the power transmission request signal, the response signal being used to instruct the power receiving device on the amplitude-phase of the power transmission equipment after modulation; the transceiver unit is further configured to receive a synchronization signal sent by the power receiving device according to the response signal; and the control unit is further configured to perform a second amplitude-phase modulation according to the synchronization signal, so as to synchronize the amplitude-phase with other power transmission devices that jointly transmit power to the power receiving device.

[0027] In conjunction with the fourth aspect, in some implementations of the fourth aspect, the synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the indication information of the power transmission device for amplitude and phase control.

[0028] Fifthly, a wireless charging system is provided, comprising one or more power-transmitting devices and one or more power-receiving devices. The power-transmitting device may be a power-receiving device as described in any possible implementation of the first aspect. The power-receiving device may be a power-transmitting device as described in any possible implementation of the second aspect.

[0029] In a sixth aspect, a computer-readable storage medium is provided that stores program code for execution by a device, the program code including methods for performing any possible implementation of the first or second aspect described above.

[0030] In a seventh aspect, a computer program product is provided that, when the computer product is run on a computer, causes the computer to perform the method in any possible implementation of the first or second aspect described above.

[0031] Eighthly, a chip is provided, comprising a processor and an interface. The processor reads instructions stored in a memory via the interface and executes the method in any possible implementation of the first or second aspect described above.

[0032] Optionally, as one implementation, the chip includes a memory. The memory stores instructions that a processor can use to execute. When the instructions are executed, the processor performs the method in either the first or second possible implementation. Attached Figure Description

[0033] Figure 1 This is a system for an energy transfer method according to an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of an antenna in a power transmission device performing phase adjustment according to an instruction from a power receiving device, according to an embodiment of this application.

[0035] Figure 3 This is a schematic flowchart of an energy transmission method according to an embodiment of this application;

[0036] Figure 4 This is a schematic flowchart illustrating another energy transfer method according to an embodiment of this application;

[0037] Figure 5 This is a schematic block diagram of an energy transmission method according to an embodiment of this application;

[0038] Figure 6 This is a schematic structural diagram of an energy transmission device according to an embodiment of this application;

[0039] Figure 7 This is a schematic structural diagram of another energy transmission device according to an embodiment of this application. Detailed Implementation

[0040] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0041] To facilitate understanding of the methods provided in the embodiments of this application, a brief description will first be given of the system applicable to the wireless charging method provided in the embodiments of this application. Figure 1 A charging system 100 consisting of a power transmitting device 110 and a power receiving device 120 is shown. It should be understood that... Figure 1 The examples shown are merely illustrative and should not be construed as limiting the scope of this application. In the embodiments of this application, the charging system 100 may also include other numbers of power transmitting devices and / or other numbers of power receiving devices, and each power transmitting device and / or power receiving device may also include other numbers of antennas, which are not limited in this application.

[0042] The power transmission device 110 may include a DC power supply, an inverter, a phase shifter, a power amplifier, and a power transmission antenna. The DC power supply can be used to output a DC signal. The inverter can be used to convert the DC signal output by the DC power supply into an AC signal. The AC signal can be adjusted in amplitude and phase to form the power transmission signal. For example, the signal can be phase-adjusted by a phase shifter and its amplitude can be adjusted by the power amplifier (hereinafter referred to as the amplifier). The aforementioned amplitude and phase adjustments can be simply referred to as amplitude-phase adjustment. The amplitude-phase adjusted signal can be transmitted through a transmitting antenna. Here, the transmitting antenna may include multiple antenna elements. Each signal after amplitude-phase adjustment can be transmitted through one antenna element. Alternatively, signals with different amplitude-phase adjustments can be transmitted through different antenna elements.

[0043] It is understandable that the signals transmitted through multiple antenna elements can be electromagnetic wave signals, and the phases of the signals transmitted through these multiple antenna elements may be different. In this way, based on the principle of interference, the electromagnetic wave signals emitted by each antenna element can achieve energy focusing at one or more locations, thereby charging the receiving device. Since the signal emitted by the power transmitting device 110 can form energy focusing, it charges the receiving device.

[0044] Correspondingly, the power receiving device 120 may include a power receiving antenna, a rectifier, a voltage regulator, and a load. The power receiving antenna can be used to receive the power transmission signal from the power transmission device 110. It is understood that the signal received by the power transmission antenna is an AC signal. The rectifier can be used to convert the received AC signal into a DC signal. Subsequently, the voltage regulator can be used to adjust and output a stable voltage to power the load.

[0045] Since the phase is the main factor affecting whether the transmitted signal can achieve high-efficiency energy focusing (or energy overlap) at a certain point, the following section will explain the adjustment of the phase in conjunction with the attached diagram.

[0046] Figure 2 This illustrates the process by which two antenna elements of a power transmission device detect and transmit power signals based on signals emitted by a power receiving device. For example... Figure 2 As shown, Figure 2 a) illustrates the process by which the receiving device sends a signal. This signal could be, for example, a charging request signal, requesting the transmitting device to send a transmitting signal based on the detection of the charging request signal. Figure 2 b) shows the amplitude and phase detection of two antenna elements of the power transmission device based on the same charging request signal. Figure 2 c) illustrates the process by which the power transmission device adjusts the phase of the power transmission signal transmitted through each antenna element based on the detected different phases. Figure 2 d) in the diagram illustrates the process by which the receiving device receives the power transmission signal from the two antenna elements of the transmitting device and achieves energy focusing.

[0047] Specifically, the horizontal axis in the graph represents time, and the vertical axis represents the amplitude of the electromagnetic wave. Figure 2 In part a), when the receiving device transmits a signal (e.g., denoted as signal #1), the phase of the receiving device at transmission time t0 is... Due to the different transmission paths, the phase detected by the power transmission equipment for signal #1 at the same time through antenna element 1 and antenna element 2 may be different. For example... Figure 2 As shown in b), the phase detected by the power transmission device at time t1 based on the received signal #1 through antenna element 1 is... The phase detected by the power transmission device at time t1 based on the received signal #1 through antenna element 2 is:

[0048] Therefore, this power transmission device can perform different phase adjustments on the power transmission signals that are about to be transmitted through two different antenna elements. For example... Figure 2 c) shows that the phase of the power transmission signal transmitted via antenna element 1 can be adjusted to... The phase of the power transmission signal transmitted via antenna element 2 can be adjusted to... The phase adjustment of the power transmission signal by the power transmission equipment is similar to the principle of optical reversibility, making the power transmission signal transmitted by each antenna element similar to the reverse transmission of its respective received charging request signal. Therefore, This allows for energy focusing at the receiving device of the energy transmission signals emitted by antenna element 1 and antenna element 2 respectively. For example... Figure 2 As shown in d), the two power transmission signals form two signals with the same phase at the power receiving device. Therefore, interference can be formed to achieve energy focusing.

[0049] For example, assume that the charging request signal transmitted by the receiving device is A0cos(2πf0t). Based on the received charging request signal, the signal detected by antenna element 1 at time t1 is... The signal detected by antenna element 2 at time t1 is The power transmission signal transmitted by the power transmission equipment through antenna unit 1 is The power transmission signal sent through antenna element 2 is The two power transmission signals interfere with each other at the power receiving device, resulting in energy focusing.

[0050] It should be understood that the above examples are only for the purpose of understanding and describe the relationship between the power transmission signals transmitted by each antenna element of the power transmission device and the signals received by the power receiving device, and should not constitute any limitation on this application.

[0051] It should also be understood that Figure 2 The time t1 can be any time from the receipt of signal #1 until the transmission signal is sent, the time t2 can be any time after t1, and the time t3 can be any time after t2. This application does not limit the specific values ​​of t1, t2, and t3.

[0052] It should also be understood that antenna element 1 may detect different phase values ​​of signal #1 at different times (i.e., corresponding to different values ​​of t1), and therefore the adjusted phase value may also be different; antenna element 2 may also detect different phase values ​​of signal #1 at different times, and therefore the adjusted phase value may also be different. Figure 2This is merely an example illustrating the process of two antenna elements receiving signals from the same receiving device and performing phase adjustment. However, this should not be construed as limiting the scope of this application. This application does not limit the number of antenna elements in the power transmission device. Furthermore, Figure 2 Although not shown, it should be understood that the power transmission equipment can also adjust the amplitude of each signal, for example, according to a pre-configured power ratio, to maximize charging efficiency. This application does not limit this.

[0053] In existing technologies, a master device is selected from among different energy transmission devices, and the other energy transmission devices synchronize with this master device. This synchronization process includes phase deviations caused by transmission delays from different energy transmission devices to the master device; these phase deviations are due to the distance between the energy transmission devices. However, during energy transmission, the phase deviations between different energy transmission devices are due to the distance between the energy transmission devices and the energy receiving device; the phase deviations in these two cases are not the same. Therefore, existing technologies that achieve synchronization through direct interaction among multiple energy transmission devices cannot meet the synchronization requirements during energy transmission, and the synchronization accuracy is limited.

[0054] Therefore, this application provides an energy transmission method and apparatus that can achieve synchronization between multiple energy transmission devices and energy receiving devices, thereby improving energy transmission efficiency.

[0055] Figure 3 This is a schematic flowchart of an energy transmission method provided in an embodiment of this application, including steps 301 to 304, which will be described in detail below.

[0056] S301, the receiving device sends a power transmission request signal to multiple transmitting devices.

[0057] S302, the receiving device receives response signals from multiple transmitting devices in response to the transmitting request signal.

[0058] After the receiving device sends a power transmission request signal, it detects the response signals received from multiple power transmission devices. Optionally, if only one power transmission device is detected to have issued a response signal, or if no power transmission device issues a response signal, it indicates that there is only one power transmission device or no power transmission device in the current environment. In this case, the synchronization process ends, and the receiving device continues to receive power from the power transmission device or does not receive power (if there is no power transmission device in the environment).

[0059] S303, the receiving device obtains the amplitude and phase information of multiple transmitting devices based on the response signal.

[0060] Specifically, the response signal of the power transmission equipment includes the amplitude and phase information of the power transmission equipment and a first signaling, the first signaling including the identification information of the power transmission equipment. The power receiving equipment obtains the amplitude and phase information of the power transmission equipment based on the response signal and demodulates the first signaling to obtain the identification information of the power transmission equipment. The first signaling may include an indication of the correspondence between the power transmission equipment and an orthogonal code; each orthogonal code is assigned to a corresponding power transmission equipment, thereby representing the identification of that power transmission equipment.

[0061] S304, the power receiving device sends a synchronization signal to multiple power transmitting devices based on the amplitude and phase information of multiple power transmitting devices, and the synchronization signal enables the amplitude and phase of multiple power transmitting devices to be synchronized.

[0062] Specifically, the amplitude and phase information of the power transmission equipment refers to the amplitude and phase information of multiple power transmission antennas within the equipment. For example, for power transmission equipment T1, the amplitude and phase information of its multiple power transmission antennas could be... in Let A represent the amplitude extracted from the j-th antenna of the i-th power transmission device. ij Phase is

[0063] Optionally, before the receiving device sends a synchronization signal to the multiple power transmitting devices based on the amplitude and phase information of the multiple power transmitting devices, the method in this embodiment further includes the receiving device detecting whether the multiple power transmitting antennas in each power transmitting device have completed synchronization. The specific detection process can be referred to the above description of... Figure 2 For the sake of brevity, the embodiments of this application will not be described in detail here. If the receiving device detects that the power transmission antennas in the power transmission device have completed synchronization, the receiving device sends a synchronization signal to the power transmission devices according to the amplitude and phase information of the multiple power transmission devices. The synchronization signal makes the amplitude and phase of the multiple power transmission devices synchronized. If the power transmission device detects that the power transmission antennas in any one or more of the multiple power transmission devices have not completed synchronization, the receiving device sends a power transmission request signal to the multiple power transmission devices again. This continues until the multiple power transmission antennas in each power transmission device have completed synchronization.

[0064] Once synchronization is detected among the multiple transmission antennas within each transmission device, the transmission device continues to detect whether amplitude and phase synchronization is achieved among the multiple transmission devices. The specific detection process can be referenced above. Figure 2For the sake of brevity, the embodiments of this application will not be repeated here. If it is detected that multiple power transmission devices have not completed amplitude and phase synchronization, the power transmission device sends a synchronization signal to the multiple power transmission devices. This synchronization signal is used to synchronize the amplitude and phase among the multiple power transmission devices. Specifically, the synchronization signal may include the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information is an indication of the amplitude and phase adjustment that the power receiving device should make for each power transmission device. That is, the power transmission device can adjust the amplitude and phase of multiple power transmission antennas within the device according to the equivalent amplitude and phase information corresponding to its own identity information in the synchronization signal.

[0065] After the power transmitting equipment adjusts the amplitude and phase of multiple power transmitting antennas within its own equipment according to the synchronization signal, the receiving equipment can continue to detect whether the multiple power transmitting equipment has achieved amplitude and phase synchronization. For example, if the phase difference between the multiple power transmitting equipment is less than a first threshold and / or the amplitude difference between the multiple power transmitting equipment is less than a second threshold, then the multiple power transmitting equipment has achieved amplitude and phase synchronization, where the first threshold and the second threshold can be manually defined values. If it is detected that the multiple power transmitting equipment has not achieved amplitude and phase synchronization, the receiving equipment sends a synchronization signal to the multiple power transmitting equipment again.

[0066] In this embodiment, the interaction between the power receiving device and multiple power transmitting devices, as well as the amplitude and phase synchronization between the multiple power transmitting devices and the power receiving device, can be performed during the power transmission process. Before amplitude and phase synchronization is completed, each power transmitting device can transmit power independently. After amplitude and phase synchronization is completed, multiple power transmitting devices can achieve efficient joint power transmission. In actual power transmission, the clock frequencies of different devices may drift, and amplitude and phase synchronization needs to be performed periodically. The power transmission method in this embodiment ensures that energy transmission is not interrupted due to the amplitude and phase synchronization process between multiple power transmitting devices and the power receiving device. When the power receiving device detects amplitude and phase asynchrony, it will initiate the amplitude and phase synchronization process during the power transmission process.

[0067] Figure 4 This is a schematic flowchart of another energy transmission method provided in the embodiments of this application, including steps 401 to 405, which will be described in detail below.

[0068] S401, the power transmission equipment receives the power transmission request signal sent by the power receiving equipment.

[0069] Optionally, the power transmission equipment may periodically broadcast power transmission service signals, and stop broadcasting upon receiving a power transmission request signal.

[0070] S402, the power transmission equipment performs the first amplitude and phase modulation on the power transmission antennas in the power transmission equipment according to the power transmission request signal, so that the amplitude and phase of the power transmission antennas in the power transmission equipment are synchronized.

[0071] Specifically, the process by which the power transmission equipment performs the first phase modulation on the power transmission antenna within the equipment based on the power transmission request signal can be referred to the above. Figure 2 For the sake of brevity, the embodiments of this application will not be described in detail here.

[0072] S403, the power transmission equipment sends a response signal to the power receiving equipment in response to the power transmission request signal. The response signal is used to instruct the power receiving equipment to adjust the amplitude and phase of the power transmission equipment.

[0073] The response signal includes the amplitude and phase information of multiple power transmission antennas after the power transmission equipment performs the first amplitude and phase modulation on the power transmission antennas inside the equipment.

[0074] S404, the power transmission equipment receives the synchronization signal sent by the power receiving equipment according to the response signal.

[0075] The synchronization signal may include the equivalent amplitude and phase information of each of the multiple power transmission devices and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information is an indication of the amplitude and phase control that the power receiving device should make for each power transmission device. That is, the power transmission device can control the amplitude and phase information of multiple power transmission antennas in the device according to the equivalent amplitude and phase information corresponding to its own identity information in the synchronization signal.

[0076] Optionally, before receiving the synchronization signal sent by the receiving device according to the response signal, if the multiple transmission antennas in any one or more of the multiple transmission devices have not been synchronized, the transmission device may also receive the transmission request signal sent by the receiving device to the multiple transmission devices again. The transmission device then performs the first phase modulation on the transmission antennas in the transmission device according to the transmission request signal until the multiple transmission antennas in each transmission device are synchronized.

[0077] S405, the power transmission equipment performs a second amplitude-phase control based on the synchronization signal to synchronize the amplitude and phase with other power transmission equipment that jointly transmits power to the power receiving equipment.

[0078] During the energy transmission process, the energy transmission equipment can receive the synchronization signal from the energy receiving equipment multiple times, and perform a second amplitude and phase control based on the synchronization signal, so that multiple energy transmission equipment can maintain amplitude and phase synchronization during the energy transmission process, thereby improving the energy transmission efficiency.

[0079] Figure 5 The diagram shown is a schematic block diagram of an energy transfer method according to an embodiment of this application. It should be understood that... Figure 5 Only one power receiving device and one power transmitting device are shown in the diagram; the operation is similar for multiple power transmitting devices. The following is a combination of... Figure 5 The process of multiple energy transmission devices jointly transmitting energy to a single energy receiving device is described in detail.

[0080] The power transmission equipment periodically broadcasts service signals. If a power receiving device has a power transmission need, it sends a power transmission request signal, which is received by multiple power transmission devices within the power transmission range. Conversely, if a power transmission device does not receive a power transmission request signal, it continues to periodically broadcast service signals.

[0081] After receiving a power transmission request signal, each of the multiple power transmission devices synchronizes its multiple antennas. Specifically, for power transmission device T1, after receiving the power transmission request signal, T1 extracts the amplitude and phase information of its multiple power transmission antennas as follows: in Let A represent the amplitude extracted from the j-th antenna of the i-th power transmission device. ij Phase is For ease of explanation, it is assumed here that the number of transmission antennas in each power transmission device is m. It should be understood that the operation is similar when the number of transmission antennas in each power transmission device is different. Accordingly, for power transmission device T2, after receiving the power transmission request signal, the amplitude and phase information of the multiple transmission antennas within the device is extracted as follows: If there are other power transmission devices, the operation is the same as for T1 and T2. It should be understood that the amplitude and phase information of the multiple power transmission antennas extracted by power transmission devices T1 and T2 after receiving the power transmission request signal is the adjusted amplitude and phase information based on the received power transmission request signal. The specific adjustment process can be referred to the above for details. Figure 2 For the sake of brevity, the embodiments of this application will not be described in detail here.

[0082] After synchronizing multiple antennas within the power transmission equipment, the power transmission equipment sends preliminary energy and extracted amplitude and phase information from multiple power transmission antennas to the power receiving equipment.

[0083] The receiving device receives the initial energy transmitted by each of the multiple transmitting devices and extracts the amplitude and phase information from the multiple transmitting antennas, then checks whether the multiple transmitting antennas in each transmitting device have completed synchronization. If any antenna in a transmitting device is not synchronized, the receiving device continues to transmit a power request signal. If the transmitting antennas in each transmitting device are synchronized, the receiving device checks whether the multiple transmitting devices are synchronized. Because the signal delays of different transmitting devices are different, this manifests as different phases on the receiving device side; therefore, the different transmitting devices are not synchronized at this point. The receiving device can detect the equivalent amplitude and phase information of each transmitting device. Each power transmission device corresponds to an equivalent amplitude and phase information. For example, the equivalent amplitude and phase information corresponding to power transmission device T1 is... Equivalent amplitude and phase information is an indication of the adjustments that the receiving equipment needs to make to the transmitting equipment.

[0084] The receiving device sends synchronization signals to multiple transmitting devices. Specifically, the receiving device sends the amplitude and phase information corresponding to each transmitting device. An information sequence is constructed using the ID of the transmitting device, and information about the receiving device itself, such as its ID and remaining power, can also be added. This information can be included in the synchronization signal. The receiving device modulates the above information and sends it to each transmitting device, where the modulation can use the orthogonal code of the transmitting device.

[0085] Each power transmission device receives the same synchronization signal, demodulates the information, and finds the equivalent amplitude and phase information corresponding to its own device ID. The amplitude and phase of the signal are adjusted. Specifically, based on the received equivalent amplitude and phase information, the power transmission equipment introduces an additional phase shift into the overall phase of all antennas within the equipment. Introduce an additional proportion to the overall power transmission amplitude of all antennas within the device. For example, the amplitude and phase of the first antenna in the adjusted power transmission device T1 for:

[0086]

[0087] Among them, A″ 11 A represents the amplitude of the first antenna in power transmission equipment T1 after adjustment. 11 The amplitude of the first antenna in power transmission equipment T1 before adjustment. The phase of the first antenna in power transmission equipment T1 after adjustment. This is the phase of the first antenna in power transmission device T1 before adjustment. Therefore, each power transmission device transmits energy based on the adjusted amplitude and phase information.

[0088] After receiving energy from multiple power transmitting devices, the receiving device checks again whether the multiple power transmitting devices have completed synchronization. Specifically, the receiving device can re-extract the amplitude and phase information of the multiple power transmitting devices. If the phase difference between different power transmitting devices is less than a first threshold and / or the phase difference between different power transmitting devices is less than a second threshold, then it is determined that the multiple power transmitting devices have completed synchronization. The first threshold and the second threshold can be manually defined values. Otherwise, the receiving device continues to send synchronization signals for the multiple power transmitting devices.

[0089] The above-mentioned amplitude and phase synchronization can be performed during the power transmission process. After the power transmission is completed, the receiving device sends a power transmission end signal to the power transmitting device to terminate the power transmission.

[0090] Figure 6 A schematic structural diagram of an energy transmission device according to an embodiment of this application is shown, wherein the device is disposed in an energy receiving device, specifically, it can correspond to Figure 1 Chips in medium-powered devices. For example... Figure 6As shown, the device 600 includes a transceiver unit 601 and a control unit 602.

[0091] The transceiver unit 601 is used to send power transmission request signals to multiple power transmission devices.

[0092] The transceiver unit 601 is also used to receive response signals from multiple power transmission devices in response to power transmission request signals.

[0093] The control unit 602 is used to acquire amplitude and phase information of multiple power transmission devices based on the response signal.

[0094] The control unit 602 and the transceiver unit 601 are also used to send a synchronization signal to the multiple power transmission devices based on the amplitude and phase information of the multiple power transmission devices, so that the amplitude and phase of the multiple power transmission devices are synchronized.

[0095] The synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the instruction information of the control unit for amplitude and phase control of each power transmission device.

[0096] Optionally, before sending a synchronization signal to multiple power transmission devices based on the amplitude and phase information of multiple power transmission devices, the control unit 602 is further configured to: detect whether the power transmission antennas in each power transmission device have completed synchronization based on the amplitude and phase information of each power transmission device.

[0097] Optionally, if the control unit 602 detects that the power transmission antennas in each power transmission device have completed synchronization, the control unit 602 controls the transceiver unit 601 to send synchronization signals to the multiple power transmission devices according to the amplitude and phase information of the multiple power transmission devices. The synchronization signals enable the amplitude and phase of the multiple power transmission devices to be synchronized.

[0098] Optionally, if the control unit 602 detects that the power transmission antennas in any one or more of the power transmission devices have not been synchronized, the transceiver unit 601 sends a power transmission request signal to the power transmission devices again.

[0099] Optionally, the control unit 602 and the transceiver unit 601 are specifically used for: if the control unit 602 detects that the multiple power transmission devices have not completed synchronization based on the amplitude and phase information of the multiple power transmission devices, the transceiver unit 601 sends a synchronization signal to the multiple power transmission devices.

[0100] It should be understood that Figure 6 The transceiver unit 601 and control unit 602 in the power transmission device 600 shown can achieve the above-mentioned functions. Figure 3 The specific functions of each step in the method, and the transceiver unit 601 and control unit 602 in the power transmission device 600, can be found in the above description. Figure 3For the sake of brevity, the embodiments of this application will not be described in detail here.

[0101] It should also be understood that Figure 6 This is merely a simplified design of the power transmission device. In practical applications, the power transmission device may also include other necessary components, including, but not limited to, any number of transceiver units, control units, etc., and all terminals that can implement this application are within the protection scope of this application.

[0102] Figure 7 A schematic structural diagram of another energy transmission device according to an embodiment of this application is shown, wherein the device is disposed in an energy transmission equipment, specifically, it can correspond to Figure 1 Chips in medium-voltage power transmission equipment. For example... Figure 7 As shown, the device 700 includes a transceiver unit 701 and a control unit 702.

[0103] The transceiver unit 701 is used to receive the power transmission request signal sent by the power receiving device.

[0104] The control unit 702 is used to perform first amplitude and phase modulation on the power transmission antennas in the power transmission equipment according to the power transmission request signal, so that the amplitude and phase of the power transmission antennas in the power transmission equipment are synchronized.

[0105] The transceiver unit 701 is also used to send a response signal to the power receiving device in response to the power transmission request signal. The response signal is used to instruct the power transmitting device to adjust the amplitude and phase of the signal.

[0106] The transceiver unit 701 is also used to receive the synchronization signal sent by the powered device according to the response signal.

[0107] The control unit 702 is also configured to perform a second amplitude-phase modulation based on a synchronization signal to synchronize the amplitude and phase with other energy transmission devices that jointly transmit energy to the energy receiving device.

[0108] The synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the instruction information of the control unit for amplitude and phase control of each power transmission device.

[0109] It should be understood that Figure 7 The transceiver unit 701 and control unit 702 in the power transmission device 700 shown can achieve the above-mentioned functions. Figure 4 The specific functions of each step in the method, and the transceiver unit 701 and control unit 702 in the power transmission device 700, can be found in the above description. Figure 4 For the sake of brevity, the embodiments of this application will not be described in detail here.

[0110] It should also be understood that Figure 7This is merely a simplified design of the power transmission device. In practical applications, the power transmission device may also include other necessary components, including, but not limited to, any number of transceiver units, control units, etc., and all terminals that can implement this application are within the protection scope of this application.

[0111] This application also provides a wireless charging system. The wireless charging system includes one or more of the aforementioned power transmission devices and a power transmission unit disposed within the power transmission devices, and one or more of the aforementioned power receiving devices and a power transmission unit disposed within the power receiving devices.

[0112] This application also provides a computer-readable storage medium storing computer instructions. When the computer instructions are executed on a power transmission device or a power receiving device, they cause the power transmission device in the power transmission device to perform the steps performed by the power transmission device in the above method embodiment, or cause the power transmission device in the power receiving device to perform the steps performed by the power receiving device in the above method embodiment, thereby realizing the method for wireless power transmission in the above embodiment.

[0113] This application also provides a computer program product that, when run on a computer, causes the computer to perform the aforementioned steps to implement the method for wireless power transmission executed by the power transmitting or receiving device in the above embodiments.

[0114] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0115] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of the invention, the sequence number of the above-described processes does not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the invention.

[0116] As used in this specification, the terms "component," "module," "system," etc., are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, applications running on computing devices and computing devices can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0117] It should also be understood that the terms "first," "second," and various numerical designations used herein are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0118] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The existence of A or B alone does not limit the number of A or B objects. Taking the existence of A alone as an example, it can be understood as having one or more A objects.

[0119] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0120] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0121] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0122] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0123] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0124] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0125] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for transmitting energy, characterized in that, include: The receiving device sends a power transmission request signal to multiple power transmitting devices, and the power transmission request signal causes the power transmission antennas in each of the multiple power transmitting devices to be synchronized in amplitude. The receiving device receives response signals from the plurality of transmitting devices in response to the transmitting request signal; The receiving device acquires the amplitude and phase information of the plurality of transmitting devices based on the response signal; The power receiving device sends a synchronization signal to the multiple power transmitting devices based on the amplitude and phase information of the multiple power transmitting devices, and the synchronization signal enables the amplitude and phase of the multiple power transmitting devices to be synchronized.

2. The method according to claim 1, characterized in that, The synchronization signal enables the amplitude and phase synchronization among the plurality of power transmission devices, including: the synchronization signal makes the power transmission signal of each power transmission device have the same phase at the power receiving device.

3. The method according to claim 1 or 2, characterized in that, Before the power receiving device sends a synchronization signal to the plurality of power transmitting devices based on the amplitude and phase information of the plurality of power transmitting devices, the method further includes: The receiving device detects whether the power transmission antennas within each power transmission device have achieved synchronization based on the amplitude and phase information of each power transmission device.

4. The method according to claim 3, characterized in that, If the receiving device detects that synchronization has been completed between the power transmission antennas in each of the power transmission devices, the method further includes: The power receiving device sends a synchronization signal to the multiple power transmitting devices based on the amplitude and phase information of the multiple power transmitting devices, and the synchronization signal enables the amplitude and phase of the multiple power transmitting devices to be synchronized.

5. The method according to claim 3, characterized in that, If the receiving device detects that the power antennas in any one or more of the plurality of power transmitting devices have not been synchronized, the method further includes: The receiving device sends the power transmission request signal to the plurality of transmitting devices again.

6. The method according to claim 1 or 2, characterized in that, The power receiving device sends a synchronization signal to the plurality of power transmitting devices based on the amplitude and phase information of the plurality of power transmitting devices, including: If the receiving device detects that the multiple power transmitting devices have not achieved synchronization based on the amplitude and phase information of the multiple power transmitting devices, then the receiving device sends the synchronization signal to the multiple power transmitting devices.

7. The method according to claim 1 or 2, characterized in that, The synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the instruction information of the power receiving device for amplitude and phase control of each power transmission device.

8. The method according to claim 1 or 2, characterized in that, The method is applied in the field of microwave wireless power transmission.

9. A method for transmitting energy, characterized in that, include: The power transmission equipment receives power transmission request signals sent by the power receiving equipment; According to the power transmission request signal, the power transmission equipment performs a first amplitude and phase modulation on the power transmission antennas within the power transmission equipment, so that the amplitude and phase of the power transmission antennas within the power transmission equipment are synchronized. The power transmission device sends a response signal to the power receiving device in response to the power transmission request signal. The response signal is used to instruct the power receiving device to perform the amplitude and phase modulation after the power transmission device. The power transmission device receives a synchronization signal sent by the power receiving device according to the response signal; The power transmission equipment performs a second amplitude-phase modulation based on the synchronization signal to achieve amplitude-phase synchronization with other power transmission equipment that jointly transmits power to the power receiving equipment.

10. The method according to claim 9, characterized in that, The synchronization of amplitude and phase among other power transmission devices that jointly transmit power to the power receiving device includes: the power transmission signals of the other power transmission devices that jointly transmit power to the power receiving device are in phase at the power receiving device.

11. The method according to claim 9 or 10, characterized in that, The synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the indication information of the power transmission device for amplitude and phase control.

12. The method according to claim 9 or 10, characterized in that, The method is applied in the field of microwave wireless power transmission.

13. A power transmission device, characterized in that, The device is disposed in the power receiving device and includes: A transceiver unit is used to send a power transmission request signal to multiple power transmission devices, the power transmission request signal causing the power transmission antennas in each of the multiple power transmission devices to be synchronized in amplitude; The transceiver unit is also configured to receive response signals from the plurality of power transmission devices in response to the power transmission request signal; The control unit is used to acquire the amplitude and phase information of the plurality of power transmission devices based on the response signal; The control unit and the transceiver unit are further configured to send a synchronization signal to the plurality of power transmission devices based on the amplitude and phase information of the plurality of power transmission devices, wherein the synchronization signal enables the amplitude and phase of the plurality of power transmission devices to be synchronized.

14. The apparatus according to claim 13, characterized in that, The synchronization signal enables the amplitude and phase synchronization among the plurality of power transmission devices, including: the synchronization signal makes the power transmission signal of each power transmission device have the same phase at the power receiving device.

15. The apparatus according to claim 13, characterized in that, Before sending a synchronization signal to the plurality of power transmission devices based on the amplitude and phase information of the plurality of power transmission devices, the control unit is further configured to: Based on the amplitude and phase information of each of the power transmission devices, it is detected whether the power transmission antennas within the power transmission devices have completed synchronization.

16. The apparatus according to claim 15, characterized in that, If the control unit detects that synchronization has been completed between the power transmission antennas in each of the power transmission devices, the control unit is further configured to: Based on the amplitude and phase information of the plurality of power transmission devices, the transceiver unit is controlled to send a synchronization signal to the plurality of power transmission devices, and the synchronization signal enables the amplitude and phase of the plurality of power transmission devices to be synchronized.

17. The apparatus according to claim 15, characterized in that, If the control unit detects that the power transmission antennas in any one or more of the plurality of power transmission devices have not been synchronized, the transceiver unit is further configured to: The power transmission request signal is sent again to multiple power transmission devices.

18. The apparatus according to claim 13, characterized in that, The step of sending a synchronization signal to the plurality of power transmission devices based on the amplitude and phase information of the plurality of power transmission devices, wherein the control unit and the transceiver unit are specifically used for: If the control unit detects that the multiple power transmission devices have not achieved synchronization based on the amplitude and phase information of the multiple power transmission devices, the transceiver unit sends the synchronization signal to the multiple power transmission devices.

19. The apparatus according to any one of claims 13 to 18, characterized in that, The synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the instruction information of the control unit for amplitude and phase control of each power transmission device.

20. A power transmission device, characterized in that, The device is installed in the energy transmission equipment and includes: The transceiver unit is used to receive power transmission request signals sent by the power receiving device; The control unit is configured to perform a first amplitude and phase modulation on the power transmission antennas in the power transmission equipment according to the power transmission request signal, so that the amplitude and phase of the power transmission antennas in the power transmission equipment are synchronized. The transceiver unit is further configured to send a response signal to the power receiving device in response to the power transmission request signal, the response signal being used to instruct the power transmitting device to perform the amplitude and phase modulation after the regulation. The transceiver unit is also used to receive a synchronization signal sent by the power receiving device according to the response signal; The control unit is further configured to perform a second amplitude-phase modulation based on the synchronization signal to synchronize the amplitude and phase with other energy transmission devices that jointly transmit energy to the energy receiving device.

21. The apparatus according to claim 20, characterized in that, The synchronization of amplitude and phase among other power transmission devices that jointly transmit power to the power receiving device includes: the power transmission signals of the other power transmission devices that jointly transmit power to the power receiving device are in phase at the power receiving device.

22. The apparatus according to claim 20 or 21, characterized in that, The synchronization signal includes the equivalent amplitude and phase information of each power transmission device and the identity information corresponding to each power transmission device. The equivalent amplitude and phase information of each power transmission device includes the indication information of the power transmission device for amplitude and phase control.

23. A computer-readable storage medium, characterized in that, The computer-readable medium stores program code for execution by the device, the program code including methods for performing any one of claims 1 to 8, or any one of claims 9 to 12.

24. A chip, characterized in that, The chip includes a processor and a data interface. The processor reads instructions stored in the memory through the data interface to execute the method as described in any one of claims 1 to 8, or the method as described in any one of claims 9 to 12.

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