WO2021217613A1 - Procédé et appareil de transfert d'énergie - Google Patents

Procédé et appareil de transfert d'énergie Download PDF

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Publication number
WO2021217613A1
WO2021217613A1 PCT/CN2020/088404 CN2020088404W WO2021217613A1 WO 2021217613 A1 WO2021217613 A1 WO 2021217613A1 CN 2020088404 W CN2020088404 W CN 2020088404W WO 2021217613 A1 WO2021217613 A1 WO 2021217613A1
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WO
WIPO (PCT)
Prior art keywords
energy transmission
amplitude
energy
phase
synchronization
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PCT/CN2020/088404
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English (en)
Chinese (zh)
Inventor
姜伟鹏
黄韬
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202080092632.9A priority Critical patent/CN114930678A/zh
Priority to PCT/CN2020/088404 priority patent/WO2021217613A1/fr
Publication of WO2021217613A1 publication Critical patent/WO2021217613A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Definitions

  • This application relates to the field of wireless charging, and more specifically, to an energy transmission method and device.
  • Wireless power transfer (WPT) technology can realize that the energy of electronic devices is ready to use, which will greatly improve the convenience of users.
  • General wireless energy transmission technologies include magnetic induction charging, magnetic resonance charging and microwave wireless charging technologies.
  • Currently commercially available wireless charging products, such as wireless charging pads for mobile phones, are based on magnetic induction or magnetic resonance technology.
  • the transmission efficiency of magnetic induction or magnetic resonance technology is high, but the charging distance is very short, usually contact charging or millimeter distance, and the relative pose and posture of the transmitting and receiving coil are relatively high, which greatly limits the convenience and convenience of charging.
  • the scope of application cannot support large-scale, multi-terminal, and mobile charging.
  • Microwave power transfer (MPT) technology has obvious advantages in coverage, multiple terminals, and mobility support. However, due to the omnidirectional microwave radiation, energy is difficult to focus, and the effective charging power is low.
  • the key point of energy focusing is the equivalent antenna array aperture of the energy transmission equipment.
  • a larger antenna array is usually required, but it is difficult to install and deploy a large antenna array.
  • multiple small distributed energy transmission equipment are used (small array energy transmission circuits can be integrated into wireless routers, speakers, TVs and other equipment), and joint energy transmission is performed, a larger equivalent array aperture can be achieved, and the realization is better.
  • the focus effect is simple, and deployment is simple. However, because different devices have different crystal oscillator clocks, the inherent frequency deviation and drift deviation of the clock will cause the devices to be out of synchronization. Therefore, the key to distributed energy transmission lies in the synchronization between multiple energy transmission equipment and energy receiving equipment.
  • the present application provides an energy transmission method and device, which can realize synchronization between multiple energy transmission equipment according to the energy receiving equipment, thereby improving energy transmission efficiency.
  • an energy transmission method which includes: an energy receiving device sends an energy transmission request signal to multiple energy transmission devices; the energy receiving device receives response signals from the multiple energy transmission devices to the energy transmission request signal; The device obtains the amplitude and phase information of multiple energy transmission devices according to the response signal; the energy receiving device sends a synchronization signal to the multiple energy transmission devices according to the amplitude and phase information of the multiple energy transmission devices, and the synchronization signal makes the multiple energy transmission devices Synchronize amplitude and phase between devices.
  • the energy transmission method of the embodiments of the present application can realize the amplitude and phase synchronization between multiple energy transmission devices according to the energy receiving device, so that the energy of the multiple energy transmission devices can achieve comparison when reaching the energy receiving device.
  • High-efficiency energy focusing improves energy transmission efficiency.
  • the interaction between the energy receiving device and the multiple energy transmission devices and the amplitude and phase synchronization between the multiple energy transmission devices and the energy receiving device can be performed during the energy transmission process.
  • each energy transmission device Before completing the amplitude and phase synchronization, each energy transmission device can output energy independently, and after completing the amplitude and phase synchronization, multiple energy transmission devices can achieve efficient combined energy transmission. In the actual energy transmission process, the clock frequency of different devices drifts, and the amplitude and phase synchronization needs to be performed periodically.
  • the energy transmission method of the embodiment of the present application prevents energy transmission from being caused by multiple energy transmission devices and energy receiving devices.
  • the amplitude and phase synchronization process is interrupted. After the energy receiving device finds that the amplitude and phase are out of synchronization, the amplitude and phase synchronization process will be started during the energy transmission process.
  • the method before the energy receiving device sends the synchronization signal to the multiple energy transmission devices according to the amplitude and phase information of the multiple energy transmission devices, the method further includes: the energy receiving device According to the amplitude and phase information of each energy transmission device, it is detected whether the synchronization between the energy transmission antennas in the energy transmission device is completed.
  • the method further includes: The amplitude and phase information is sent to multiple energy transmission equipment, and the synchronization signal makes the amplitude and phase synchronization between multiple energy transmission equipment.
  • the amplitude and phase synchronization of multiple energy transmission devices in the embodiment of the present application should be performed on the premise that the multiple energy transmission antennas in each energy transmission device have completed the amplitude and phase synchronization.
  • the energy emitted by the energy transmission antenna can obtain a higher efficiency energy focus at the energy receiving antenna.
  • the multiple energy transmission devices are synchronized in amplitude and phase, so that the energy focusing of the multiple energy transmission devices at the energy receiving antenna can achieve a higher efficiency.
  • the method It also includes: the energy receiving device sends an energy transmission request signal to multiple energy transmission devices again.
  • the energy receiving device continues to send energy transmission request signals to the multiple energy transmission devices until each energy transmission device according to the output It can request the signal to achieve the amplitude and phase synchronization of multiple energy transmission antennas in the device.
  • the energy receiving device sends a synchronization signal to the multiple energy transmission devices according to the amplitude and phase information of the multiple energy transmission devices, including: the energy receiving device according to the multiple energy transmission devices When the amplitude and phase information of the device detects that the synchronization between multiple energy transmission devices is not completed, the energy receiving device sends a synchronization signal to the multiple energy transmission devices.
  • the energy receiving equipment detects the amplitude and phase information of multiple energy transmission equipment to determine whether the amplitude and phase synchronization has been achieved between multiple energy transmission equipment. If the amplitude and phase synchronization has not been achieved between multiple energy transmission equipment, the energy receiving The device sends synchronization signals to multiple energy transmission devices to instruct the multiple energy transmission devices to perform amplitude and phase adjustment.
  • the synchronization signal includes the equivalent amplitude and phase information of each energy transmission device in the energy transmission device and the identity information corresponding to each energy transmission device.
  • the equivalent amplitude and phase information includes the instruction information for the energy receiving equipment to adjust the amplitude and phase of each energy transmission equipment.
  • the energy receiving device can send the same synchronization signal to each energy transmission device.
  • the synchronization signal contains the equivalent amplitude and phase information of each energy transmission device and the corresponding identity information.
  • the energy transmission device can find the corresponding equivalent amplitude according to the identity information. Phase information, adjust the amplitude and phase of the multiple energy transmission antennas in the device according to the equivalent amplitude and phase information, so as to realize the amplitude and phase synchronization between multiple energy transmission devices.
  • an energy transmission method which is characterized in that it includes: the energy transmission device receives an energy transmission request signal sent by the energy receiving device; The antenna performs the first amplitude and phase adjustment to synchronize the amplitude and phase of the energy transmission antennas in the energy transmission device; the energy transmission device sends a response signal for the energy transmission request signal to the energy receiving device, and the response signal is used to indicate the output to the energy receiving device.
  • the amplitude and phase adjusted by the energy device receives the synchronization signal sent by the energy receiving device according to the response signal; the energy transmission device performs the second amplitude and phase adjustment according to the synchronization signal to combine with other energy transmission devices that transmit energy to the energy receiving device Synchronize amplitude and phase between devices.
  • the energy transmission method provided in the first aspect of the embodiments of the present application is an energy transmission method executed on the energy receiving device side
  • the energy transmission method provided in the second aspect is an energy transmission method executed on the corresponding energy transmission device side.
  • each energy transmission device performs the amplitude and phase synchronization of the multiple energy transmission antennas in the device according to the instructions of the energy receiving device, or performs the amplitude and phase between the devices. Synchronization, to realize that the energy of multiple energy transmission equipment can achieve higher efficiency energy focusing when reaching the energy receiving equipment, and improve the energy transmission efficiency.
  • the synchronization signal includes the equivalent amplitude and phase information of each energy transmission device in the energy transmission device and the identity information corresponding to each energy transmission device.
  • the equivalent amplitude and phase information includes the instruction information used by the energy transmission equipment for amplitude and phase regulation.
  • an energy transmission device is provided.
  • the device is set in an energy receiving device and includes: a transceiving unit for sending energy transmission request signals to multiple energy transmission devices; and a transceiving unit for receiving multiple energy transmission devices.
  • the control unit before sending a synchronization signal to the multiple energy transmission devices according to the amplitude and phase information of the multiple energy transmission devices, is also used to:
  • the amplitude and phase information of the equipment is used to detect whether the synchronization between the energy transmission antennas in the energy transmission equipment is completed.
  • control unit if the control unit detects that the synchronization between the energy transmission antennas in each energy transmission device is completed, the control unit will, according to the amplitude and phase information of the multiple energy transmission devices, Control the transceiver unit to send synchronization signals to multiple energy transmission devices, and the synchronization signals make the amplitude and phase synchronization between the multiple energy transmission devices.
  • the control unit detects that the synchronization between the energy transmission antennas in any one or more of the multiple energy transmission devices is not completed, the transceiver unit again Send energy transmission request signals to multiple energy transmission devices.
  • the synchronization signal is sent to the multiple energy transmission devices, and the control unit and the transceiver unit are specifically used to: When the amplitude and phase information of each energy transmission device detects that the synchronization between multiple energy transmission devices is not completed, the transceiver unit sends a synchronization signal to the multiple energy transmission devices.
  • the synchronization signal includes the equivalent amplitude and phase information of each energy transmission device in the energy transmission device and the identity information corresponding to each energy transmission device.
  • the equivalent amplitude and phase information includes the instruction information for the control unit to adjust the amplitude and phase of each energy transmission device.
  • an energy transmission device is provided.
  • the device is set in an energy transmission device and includes: a transceiver unit for receiving an energy transmission request signal sent by the energy receiving device; a control unit for receiving an energy transmission request signal according to the energy transmission request signal.
  • the first amplitude and phase adjustment is performed on the energy transmission antenna in the energy transmission device, so that the amplitude and phase of the energy transmission antenna in the energy transmission device are synchronized; the transceiver unit is also used to send a response to the energy transmission request signal to the energy receiving device Signal, the response signal is used to instruct the energy receiving device to adjust the amplitude and phase of the energy transmission device; the transceiver unit is also used to receive the synchronization signal sent by the energy receiving device according to the response signal; the control unit is also used to perform the first step according to the synchronization signal The two amplitudes and phases are adjusted to synchronize with the amplitude and phase of other energy transmission equipment that jointly transmit energy to the energy receiving equipment.
  • the synchronization signal includes the equivalent amplitude and phase information of each energy transmission device in the energy transmission device and the identity information corresponding to each energy transmission device.
  • the equivalent amplitude and phase information includes the instruction information used by the energy transmission equipment for amplitude and phase regulation.
  • a wireless charging system in a fifth aspect, includes one or more energy transmission devices and one or more energy receiving devices.
  • the energy transmission device may be an energy receiving device in any possible implementation manner of the first aspect.
  • the energy receiving device may be the energy transmitting device in any possible implementation manner of the second aspect.
  • a computer-readable storage medium stores program code for device execution, and the program code includes any one of the possible implementation manners of the first aspect or the second aspect described above. Methods.
  • a computer program product which when the computer product runs on a computer, causes the computer to execute the method in any one of the possible implementation manners of the first aspect or the second aspect.
  • a chip in an eighth aspect, includes a processor and an interface.
  • the processor reads the instructions stored on the memory through the interface, and executes the method in any one of the possible implementation manners of the first aspect or the second aspect described above.
  • the chip includes a memory. Instructions are stored in the memory, and the processor can be used to execute the instructions stored in the memory. When the instruction is executed, the processor is used to execute the method in any one of the possible implementation manners of the first aspect or the second aspect.
  • Fig. 1 is a system for an energy transmission method according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of an antenna in an energy transmission device performing phase adjustment according to an instruction of the energy receiving device according to an embodiment of the present application;
  • FIG. 3 is a schematic flowchart of an energy transmission method according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of another energy transmission method according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of an energy transmission method according to an embodiment of the present application.
  • Fig. 6 is a schematic structural diagram of an energy transmission device according to an embodiment of the present application.
  • Fig. 7 is a schematic structural diagram of another energy transmission device according to an embodiment of the present application.
  • FIG. 1 shows a charging system 100 composed of an energy transmission device 110 and an energy receiving device 120. It should be understood that the figure shown in FIG. 1 is only an example, and should not constitute any limitation to the application.
  • the charging system 100 may also include other numbers of energy transmission devices and/or other numbers of energy receiving devices, and each energy transmission device and/or energy receiving device may also include other numbers of antennas. This application does not limit this.
  • the energy transmission equipment 110 may include a DC power supply, an inverter, a phase shifter, a power amplifier, an energy transmission antenna, and the like.
  • the DC power supply can be used to output DC signals.
  • 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 an energy output signal.
  • the phase of the signal can be adjusted by a phase shifter, and the power can be adjusted by a power amplifier (referred to as an amplifier), or amplitude adjustment.
  • the above-mentioned amplitude and phase adjustment may be referred to simply as amplitude and phase adjustment, for example.
  • the signal after amplitude and phase adjustment can be transmitted through the transmitting antenna.
  • the transmitting antenna may include a plurality of antenna elements. Each signal after amplitude and phase adjustment can be transmitted through an antenna unit. In other words, signals adjusted based on different amplitudes and phases can be transmitted through different antenna units.
  • the signals transmitted through the multiple antenna units may be electromagnetic wave signals, and the phases of the signals transmitted through the multiple antenna units may be different from each other.
  • the electromagnetic wave signals emitted by each antenna unit can be energy-focused at one or more positions, thereby charging the energy-receiving device. Since the signal emitted by the energy transmission device 110 can form an energy focus, the energy receiving device can be charged.
  • the energy receiving device 120 may include an energy receiving antenna, a rectifier, a voltage stabilizer, and a load.
  • the energy transmission antenna can be used to receive the energy transmission signal from the energy transmission device 110. It can be understood that the signal received by the energy transmission antenna is an AC signal.
  • the rectifier can be used to convert the received AC signal into a DC signal. Thereafter, the regulator can be used to adjust and output a stable voltage to supply power to the load.
  • Fig. 2 shows a process in which two antenna units of the energy transmission device detect and transmit the energy transmission signal based on the signal transmitted by the energy receiving device.
  • a) in Fig. 2 shows the process of the energy receiving device sending a signal.
  • the signal may be, for example, a charging request signal to request the energy transmission device to transmit the energy transmission signal based on the detection of the charging request signal.
  • Figure 2 b) shows the amplitude and phase detection of the two antenna units of the energy transmission device based on the same charging request signal.
  • C) in FIG. 2 shows a process in which the energy transmission device adjusts the phase of the energy transmission signal transmitted through each antenna unit based on the detected different phases.
  • Figure 2 d) shows the process of energy focusing by the energy receiving device receiving the energy transmission signals from the two antenna units of the energy transmitting device.
  • the horizontal axis in the figure represents time
  • the vertical axis represents the amplitude of electromagnetic waves.
  • the phase of the energy-receiving device at the sending time t 0 is Due to the difference in the transmission path, the phases detected by the energy transmission equipment on the signal #1 through the antenna unit 1 and the antenna unit 2 at the same time may be different.
  • the phase detected by the energy transmission device based on the received signal #1 through the antenna unit 1 at time t 1 is The phase detected by the energy transmission equipment based on the received signal #1 at time t 1 through the antenna unit 2 is
  • the energy transmission device can perform different phase adjustments on the energy transmission signals to be transmitted via two different antenna units.
  • the phase of the energy output signal transmitted via the antenna unit 1 can be adjusted to
  • the phase of the energy output signal transmitted through the antenna unit 2 can be adjusted to
  • the phase adjustment of the energy transmission signal by the energy transmission equipment is similar to the principle of reversibility of the light path, so that the energy transmission signal transmitted by each antenna unit is similar to the reverse transmission of the charging request signal received by each antenna unit. therefore, In this way, it can be realized that the energy transmission signals respectively transmitted by the antenna unit 1 and the antenna unit 2 can focus the energy at the energy receiving device.
  • the two energy output signals form two signals of the same phase at the energy receiving device. Therefore, interference can be formed and energy focus can be obtained.
  • the charging request signal transmitted by the energy receiving device is A 0 cos(2 ⁇ f 0 t).
  • the energy transmission equipment is based on the received charging request signal, and the signal detected by the antenna unit 1 at time t 1 is The signal detected by antenna unit 2 at time t 1 is The energy transmission signal sent by the energy transmission device through the antenna unit 1 is The energy output signal sent through the antenna unit 2 is The two energy input signals interfere at the energy receiving device to form energy focus.
  • time t 1 in FIG. 2 can be any time before the signal #1 is received until the energy output signal is sent
  • time t 2 can be any time after t 1
  • time t 3 can be t At any time after 2
  • this application does not limit the specific values of t 1 , t 2 , and t 3.
  • phase values detected by the antenna unit 1 at different times may be different, and therefore the adjusted phase values may also be different; the antenna unit 2 is based on the signal #1
  • the phase value detected at different times may also be different, so the adjusted phase value may also be different.
  • FIG. 2 is only an example, and shows a process in which two antenna units respectively receive signals from the same energy receiving device and perform phase adjustment. But this should not constitute any limitation to this application. This application does not limit the number of antenna units of the energy transmission equipment.
  • the energy transmission device may also adjust the amplitude of each signal, for example, according to a pre-configured power ratio, so as to maximize the charging efficiency. This application does not limit this.
  • a master device is selected among different energy transmission devices, so that other energy transmission devices are phase synchronized with the master device.
  • the phase deviation caused by the transmission delay of different energy transmission equipment to the main equipment is included. These phase deviations are caused by the distance between the energy transmission equipment; and in the energy transmission process, the phase of the different energy transmission equipment The deviation is caused by the distance between the energy transmission device and the energy receiving device, and the phase deviation in the two cases is not the same. Therefore, in the prior art, synchronization is achieved through direct interaction of multiple energy transmission devices, which cannot meet the synchronization requirements in the energy transmission process, and the synchronization accuracy is limited.
  • the embodiments of the present application provide an energy transmission method and device, which can realize synchronization between multiple energy transmission devices and energy receiving devices, thereby improving energy transmission efficiency.
  • FIG. 3 is a schematic flowchart of an energy transmission method provided by an embodiment of the present application, including steps 301 to 304, which are respectively described in detail below.
  • the energy receiving device sends an energy transmission request signal to multiple energy transmission devices.
  • the energy receiving device receives response signals from multiple energy transmission devices to the energy transmission request signal.
  • the energy receiving device After the energy receiving device sends the energy transmission request signal, it detects the received response signals of multiple energy transmission devices. Optionally, if it is detected that there is only one energy transmission device sending a response signal, or no energy transmission device sends a response signal, it means that there is only one energy transmission device or no energy transmission device in the current environment, and the synchronization process ends, and the energy receiving device Continue to accept energy transmission from energy transmission equipment or not accept energy transmission (there is no energy transmission equipment in the environment).
  • the energy receiving device obtains amplitude and phase information of multiple energy transmission devices according to the response signal.
  • the response signal of the energy transmission device includes the amplitude and phase information of the energy transmission device and the first signaling
  • the first signaling includes the identity information of the energy transmission device.
  • the energy receiving device obtains the amplitude and phase information of the energy transmission device according to the response signal, and demodulates the first signaling to obtain the identity information of the energy transmission device.
  • the first signaling may include an indication of the corresponding relationship between the energy transmission device and an orthogonal code, and each orthogonal code is allocated to the corresponding energy transmission device for use, so as to indicate the identity of the energy transmission device.
  • the energy receiving device sends a synchronization signal to the multiple energy transmission devices according to the amplitude and phase information of the multiple energy transmission devices, and the synchronization signal makes the amplitude and phase synchronization between the multiple energy transmission devices.
  • the amplitude and phase information of the energy transmission device is the amplitude and phase information of multiple energy transmission antennas in the energy transmission device.
  • the amplitude and phase information of the multiple energy transmission antennas in the equipment can be in Indicates that the amplitude extracted by the jth antenna of the i-th energy transmission device is A ij , and the phase is
  • the method of the embodiment of the present application further includes: Whether the multiple energy transmission antennas have completed synchronization, the specific detection process can refer to the above description of FIG. If the energy receiving device detects that the synchronization between the energy transmission antennas in the energy transmission device is completed, the energy receiving device sends a synchronization signal to the multiple energy transmission devices according to the amplitude and phase information of the multiple energy transmission devices.
  • the amplitude and phase of the energy equipment are synchronized; if the energy transmission equipment detects that the synchronization between the energy transmission antennas in any one or more of the multiple energy transmission equipment is not completed, the energy receiving equipment will send the energy transmission equipment to the multiple energy transmission equipment again. Send energy output request signal. Until the multiple energy transmission antennas in each energy transmission device are synchronized.
  • the energy transmission device When it is detected that the multiple energy transmission antennas in each energy transmission device have completed synchronization, the energy transmission device continues to detect whether the amplitude and phase synchronization is completed between the multiple energy transmission devices. For the specific detection process, please refer to Figure 2 above. For the sake of brevity, the description of the embodiments of the present application will not be repeated here. If it is detected that the amplitude and phase synchronization between the multiple energy transmission devices is not completed, the energy transmission device sends a synchronization signal to the multiple energy transmission devices, and the synchronization signal is used to synchronize the amplitude and phase among the multiple energy transmission devices.
  • the synchronization signal may include the equivalent amplitude and phase information of each energy transmission device in the multiple energy transmission devices and the identity information corresponding to each energy transmission device.
  • the instruction of the amplitude and phase adjustment that the device should make, that is, the energy transmission device can adjust the amplitude and phase of multiple energy transmission antennas in the device according to the equivalent amplitude and phase information corresponding to the identity information of the device in the synchronization signal.
  • the energy receiving device can continue to detect whether the multiple energy transmission devices have completed the amplitude and phase synchronization. For example, if the phase difference between the multiple energy transmission devices is less than the first threshold and/or the amplitude difference between the multiple energy transmission devices is less than the second threshold, the amplitude and phase synchronization between the multiple energy transmission devices is completed.
  • the first threshold and the second threshold may be artificially specified values. If it is detected that the amplitude and phase synchronization is not completed between multiple energy transmission devices, the energy receiving device sends a synchronization signal to the multiple energy transmission devices again.
  • the interaction between the energy receiving device and the multiple energy transmission devices and the amplitude and phase synchronization between the multiple energy transmission devices and the energy receiving device can be performed during the energy transmission process.
  • each energy transmission device Before completing the amplitude and phase synchronization, each energy transmission device can output energy independently, and after completing the amplitude and phase synchronization, multiple energy transmission devices can achieve efficient combined energy transmission. In the actual energy transmission process, the clock frequency of different devices drifts, and the amplitude and phase synchronization needs to be performed periodically.
  • the energy transmission method of the embodiment of the present application prevents energy transmission from being caused by multiple energy transmission devices and energy receiving devices.
  • the amplitude and phase synchronization process is interrupted. After the energy receiving device finds that the amplitude and phase are out of synchronization, the amplitude and phase synchronization process will be started during the energy transmission process.
  • FIG. 4 is a schematic flowchart of another energy transmission method provided by an embodiment of the present application, including steps 401 to 405, which are respectively described in detail below.
  • the energy transmission device receives an energy transmission request signal sent by the energy receiving device.
  • the energy transmission device may periodically broadcast the energy transmission service signal, and stop broadcasting after receiving the energy transmission request signal.
  • the energy transmission device According to the energy transmission request signal, the energy transmission device performs the first amplitude and phase adjustment on the energy transmission antenna in the energy transmission device, so that the amplitude and phase of the energy transmission antenna in the energy transmission device are synchronized.
  • the process of the energy transmission device performing the first amplitude and phase adjustment of the energy transmission antenna in the energy transmission device according to the energy transmission request signal can refer to the above description of FIG. .
  • the energy transmission device sends a response signal for the energy transmission request signal to the energy receiving device, where the response signal is used to instruct the energy receiving device to adjust the amplitude and phase of the energy transmission device.
  • the response signal includes the amplitude and phase information of the multiple energy transmission antennas after the energy transmission device performs the first amplitude and phase adjustment on the energy transmission antenna in the device.
  • the energy transmission device receives the synchronization signal sent by the energy receiving device according to the response signal.
  • the synchronization signal may include the equivalent amplitude and phase information of each energy transmission device in the multiple energy transmission devices and the identity information corresponding to each energy transmission device.
  • the instruction of amplitude and phase adjustment should be made, that is, the energy transmission equipment can adjust the amplitude and phase information of multiple energy transmission antennas in the equipment according to the equivalent amplitude and phase information corresponding to the identity information of the equipment in the synchronization signal.
  • the output The energy device can also receive the energy transmission request signal sent by the energy receiving device to multiple energy transmission devices again, and the energy transmission device will adjust the first amplitude and phase of the energy transmission antenna in the energy transmission device according to the energy transmission request signal again until every Multiple energy transmission antennas in one energy transmission device are synchronized.
  • the energy transmission device performs a second amplitude and phase adjustment according to the synchronization signal to synchronize the amplitude and phase with other energy transmission devices that jointly transmit energy to the energy receiving device.
  • the energy transmission device can receive the synchronization signal of the energy receiving device multiple times, and adjust the second amplitude and phase according to the synchronization signal, so that multiple energy transmission devices can maintain amplitude and phase synchronization during the energy transmission process, and improve the energy transmission. efficient.
  • FIG. 5 shows a schematic block diagram of an energy transmission method according to an embodiment of the present application. It should be understood that only one energy receiving device and one energy transmission device are shown in FIG. 5. For multiple energy transmission devices, the operation is akin. The process of joint energy transmission by multiple energy transmission devices to one energy receiving device will be described in detail below in conjunction with FIG. 5.
  • the energy transmission equipment periodically broadcasts the service signal. At this time, if an energy receiving device has an energy transmission demand, an energy transmission request signal is sent, and multiple energy transmission devices within the energy transmission range receive the energy transmission request signal. Correspondingly, if the energy transmission device does not receive the energy transmission request signal, it continues to broadcast the service signal periodically.
  • each of the multiple energy transmission equipment After each of the multiple energy transmission equipment receives the energy transmission request signal, it synchronizes the multiple antennas in the respective equipment. Specifically, for the energy transmission equipment T1, after receiving the energy transmission request signal, T1 extracts the amplitude and phase information of the multiple energy transmission antennas in the equipment as in Indicates that the amplitude extracted by the jth antenna of the i-th energy transmission device is A ij , and the phase is For the convenience of description, it is assumed here that the number of energy transmission antennas in each energy transmission device is m. It should be understood that when the number of energy transmission antennas in each energy transmission device is different, the operation is similar.
  • the energy transmission equipment T2 after receiving the energy transmission request signal, extract the amplitude and phase information of the multiple energy transmission antennas in the equipment as If there are other energy transmission equipment, the operation is the same as T1 and T2.
  • the amplitude and phase information of the multiple energy transmission antennas in the equipment extracted by the energy transmission equipment T1 and T2 after receiving the energy transmission request signal is the amplitude and phase information adjusted according to the energy transmission request signal.
  • the adjustment process reference may be made to the description of FIG. 2 above. For the sake of brevity, the description of the embodiment of the present application will not be repeated here.
  • the energy transmission device After the energy transmission device synchronizes the multiple antennas in the device, it sends the preliminary energy and the extracted amplitude and phase information of the multiple energy transmission antennas to the energy receiving device.
  • the energy receiving device receives the preliminary energy sent by each of the multiple energy transmission devices and the extracted amplitude and phase information of the multiple energy transmission antennas, and detects whether the multiple energy transmission antennas in each energy transmission device have completed synchronization. If the antenna in the energy transmission device has not completed synchronization, the energy receiving device continues to send the energy transmission request signal. If synchronization is completed between the energy transmission antennas in each energy transmission device, the energy receiving device detects whether multiple energy transmission devices are synchronized. Since the signal delays of different energy transmission devices are different, which are reflected in different phases on the energy receiving device side, the different energy transmission devices are not synchronized at this time.
  • the energy receiving equipment can detect the equivalent amplitude and phase information of each energy transmission equipment
  • Each energy transmission device corresponds to an equivalent amplitude and phase information, for example, the equivalent amplitude and phase information corresponding to the energy transmission device T1 is
  • the equivalent amplitude and phase information is an indication of the adjustment that the energy receiving equipment needs to make to the energy transmission equipment.
  • the energy receiving device sends multiple energy transmission device synchronization signals. Specifically, the energy receiving device sends the amplitude and phase information corresponding to each energy transmission device
  • the information sequence is constructed with the ID of the energy transmission device, and at the same time, the information of the energy receiving device itself can be added, such as the energy receiving device ID, the remaining power of the energy receiving device, etc., all of which can be included in the synchronization signal.
  • the energy receiving device modulates the above information and sends it to each energy transmission device, where the modulation can use the orthogonal code of the energy transmission device.
  • Each energy transmission device receives the same synchronization signal, demodulates the information, and finds the equivalent amplitude and phase information corresponding to its own device ID Adjust its own amplitude and phase. Specifically, the energy transmission equipment introduces an additional phase shift to the overall phase of all antennas in the equipment based on the equivalent amplitude and phase information received Introduce the overall energy output amplitude of all antennas in the device into an additional ratio For example, the amplitude and phase of the first antenna in the adjusted energy transmission equipment T1 for:
  • A" 11 is the adjusted amplitude of the first antenna in the energy transmission equipment T1
  • a 11 is the amplitude before the adjustment of the first antenna in the energy transmission equipment T1.
  • the energy receiving device After the energy receiving device receives the energy sent by multiple energy transmission devices, it again detects whether the multiple energy transmission devices are synchronized. Specifically, the energy receiving device can re-extract the amplitude and phase information of multiple energy transmission devices. If the phase difference between the two is less than the first threshold, and/or the phase difference between the different energy transmission devices is less than the second threshold, it is determined that the synchronization of multiple energy transmission devices is completed. The first threshold and the second threshold may be artificially specified Otherwise, the energy-receiving device continues to send synchronization signals of multiple energy-transmitting devices.
  • the above amplitude and phase synchronization can be carried out during the energy transmission process.
  • the energy receiving device After the energy transmission is over, the energy receiving device sends an energy output end signal to the energy transmitting device to end the energy transmission.
  • FIG. 6 shows a schematic structural diagram of an energy transmission device according to an embodiment of the present application, where the device is provided in an energy receiving device, specifically, it may correspond to the chip in the energy receiving device in FIG. 1.
  • the device 600 includes a transceiver unit 601 and a control unit 602.
  • the transceiver unit 601 is configured to send energy transmission request signals to multiple energy transmission devices.
  • the transceiver unit 601 is also used to receive response signals from multiple energy transmission devices to the energy transmission request signal.
  • the control unit 602 is configured to obtain amplitude and phase information of multiple energy transmission devices according to the response signal.
  • the control unit 602 and the transceiver unit 601 are also configured to send synchronization signals to multiple energy transmission devices according to the amplitude and phase information of the multiple energy transmission devices, and the synchronization signals enable the amplitude and phase synchronization between the multiple energy transmission devices.
  • the synchronization signal includes the equivalent amplitude and phase information of each energy transmission device in the energy transmission equipment and the identity information corresponding to each energy transmission device.
  • the equivalent amplitude and phase information of each energy transmission device includes the control unit's Instruction information for the amplitude and phase adjustment of the device.
  • control unit 602 before sending synchronization signals to multiple energy transmission devices based on the amplitude and phase information of the multiple energy transmission devices, the control unit 602 is further configured to: detect the amplitude and phase information of each energy transmission device Whether the synchronization is completed between the energy transmission antennas
  • control unit 602 controls the transceiver unit 601 to transmit information to the multiple energy transmission devices according to the amplitude and phase information of the multiple energy transmission devices.
  • the synchronization signal makes the amplitude and phase synchronization between multiple energy transmission equipment.
  • the transceiver unit 601 sends an energy transmission request to the multiple energy transmission devices again Signal.
  • control unit 602 and the transceiver unit 601 are specifically configured to: the control unit 602 detects that the synchronization between the multiple energy transmission devices is not completed according to the amplitude and phase information of the multiple energy transmission devices, then the transceiver unit 601 transmits the energy to the multiple energy transmission devices. The device sends a synchronization signal.
  • transceiver unit 601 and the control unit 602 in the energy transmission device 600 shown in FIG. 6 can implement the steps of the method in FIG. 3 above, and the specific functions of the transceiver unit 601 and the control unit 602 in the energy transmission device 600 can be With reference to the above description of FIG. 3, for the sake of brevity, the embodiments of the present application will not be repeated here.
  • FIG. 6 only shows a simplified design of the energy transmission device.
  • the energy 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.
  • FIG. 7 shows a schematic structural diagram of another energy transmission device according to an embodiment of the present application, where the device is provided in the energy transmission device, and specifically, may correspond to the chip in the energy transmission device in FIG. 1.
  • the device 700 includes a transceiver unit 701 and a control unit 702.
  • the transceiver unit 701 is configured to receive an energy transmission request signal sent by an energy receiving device.
  • the control unit 702 is configured to adjust the first amplitude and phase of the energy transmission antenna in the energy transmission device according to the energy transmission request signal, so that the amplitude and phase of the energy transmission antenna in the energy transmission device are synchronized.
  • the transceiving unit 701 is also used to send a response signal for the energy transmission request signal to the energy receiving device, and the response signal is used to instruct the energy receiving device to adjust the amplitude and phase of the energy transmitting device.
  • the transceiver unit 701 is also used to receive a synchronization signal sent by the energy receiving device according to the response signal.
  • the control unit 702 is further configured to perform a second amplitude and phase adjustment according to the synchronization signal, so as to synchronize the amplitude and phase with other energy transmission devices that jointly transmit energy to the energy receiving device.
  • the synchronization signal includes the equivalent amplitude and phase information of each energy transmission device in the energy transmission equipment and the identity information corresponding to each energy transmission device.
  • the equivalent amplitude and phase information of each energy transmission device includes the control unit's Instruction information for the amplitude and phase adjustment of the device.
  • transceiver unit 701 and the control unit 702 in the energy transmission device 700 shown in FIG. 7 can implement the steps of the method in FIG. 4, and the specific functions of the transceiver unit 701 and the control unit 702 in the energy transmission device 700 can be With reference to the foregoing description of FIG. 4, for the sake of brevity, the embodiments of the present application will not be repeated here.
  • FIG. 7 only shows a simplified design of the energy transmission device.
  • the energy 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.
  • the embodiment of the present application also provides a wireless charging system.
  • the wireless charging system includes one or more of the aforementioned energy transmission equipment and the energy transmission device arranged in the energy transmission equipment, and one or more of the aforementioned energy receiving equipment and the energy transmission device arranged in the energy receiving equipment.
  • the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, when the computer instructions run on the energy transmission device or the energy receiving device, the energy transmission device
  • the device executes the steps performed by the energy transmission device in the above method embodiment, or causes the energy transmission device in the energy receiving device to perform the steps performed by the energy receiving device in the above method embodiment, thereby realizing the wireless energy transmission in the above embodiment Methods.
  • the embodiment of the present application also provides a computer program product.
  • the computer program product runs on a computer, the computer is caused to execute the above-mentioned related steps, so as to realize the wireless operation performed by the energy transmission device or the energy receiving device in the above-mentioned embodiment.
  • the method of energy transmission is performed by the energy transmission device or the energy receiving device in the above-mentioned embodiment.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And/or” describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the associated objects before and after are in an “or” relationship.
  • the following at least one item (a)” or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a).
  • 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 .
  • component used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution.
  • the component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and/or a computer running on a processor.
  • the application running on the computing device and the computing device can be components.
  • One or more components may reside in processes and/or threads of execution, and components may be located on one computer and/or distributed among two or more computers.
  • these components can be executed from various computer readable media having various data structures stored thereon.
  • the component can be based on, for example, a signal having one or more data packets (e.g. data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through a signal) Communicate through local and/or remote processes.
  • a signal having one or more data packets (e.g. data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through a signal) Communicate through local and/or remote processes.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil de transfert d'énergie pouvant réaliser une synchronisation parmi une pluralité de dispositifs de transfert d'énergie selon un dispositif de réception d'énergie pour améliorer l'efficacité de transfert d'énergie. Le procédé comprend : un dispositif de réception d'énergie envoie un signal de demande de transfert d'énergie à une pluralité de dispositifs de transfert d'énergie ; le dispositif de réception d'énergie reçoit des signaux de réponse de la pluralité de dispositifs de transfert d'énergie pour le signal de demande de transfert d'énergie ; le dispositif de réception d'énergie obtient des informations de phase d'amplitude de la pluralité de dispositifs de transfert d'énergie en fonction des signaux de réponse ; et le dispositif de réception d'énergie envoie un signal de synchronisation à la pluralité de dispositifs de transfert d'énergie en fonction des informations de phase d'amplitude de la pluralité de dispositifs de transfert d'énergie, le signal de synchronisation synchronisant les phases d'amplitude de la pluralité de dispositifs de transfert d'énergie.
PCT/CN2020/088404 2020-04-30 2020-04-30 Procédé et appareil de transfert d'énergie WO2021217613A1 (fr)

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CN202080092632.9A CN114930678A (zh) 2020-04-30 2020-04-30 输能方法和装置
PCT/CN2020/088404 WO2021217613A1 (fr) 2020-04-30 2020-04-30 Procédé et appareil de transfert d'énergie

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105391184A (zh) * 2014-08-28 2016-03-09 现代自动车株式会社 无线电力传输系统控制方法、无线电力接收装置及传输方法
CN106130105A (zh) * 2016-07-11 2016-11-16 深圳天珑无线科技有限公司 无线充电装置、系统及方法
WO2018106762A1 (fr) * 2016-12-11 2018-06-14 Apple Inc. Systèmes d'alimentation sans fil multi-émetteurs
CN109149684A (zh) * 2018-07-31 2019-01-04 华为技术有限公司 一种无线充电设备
CN109977973A (zh) * 2017-12-28 2019-07-05 深圳先进技术研究院 充电系统接收端状态估计方法、装置、设备和存储介质

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105391184A (zh) * 2014-08-28 2016-03-09 现代自动车株式会社 无线电力传输系统控制方法、无线电力接收装置及传输方法
CN106130105A (zh) * 2016-07-11 2016-11-16 深圳天珑无线科技有限公司 无线充电装置、系统及方法
WO2018106762A1 (fr) * 2016-12-11 2018-06-14 Apple Inc. Systèmes d'alimentation sans fil multi-émetteurs
CN109977973A (zh) * 2017-12-28 2019-07-05 深圳先进技术研究院 充电系统接收端状态估计方法、装置、设备和存储介质
CN109149684A (zh) * 2018-07-31 2019-01-04 华为技术有限公司 一种无线充电设备

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