A charging control method, device, equipment and computer-readable storage medium

Abstract

Embodiments of the present application disclose a charging control method, apparatus, device, and computer-readable storage medium, the method comprising: establishing a charging connection with a power supply device based on a first antenna or a second antenna in a device to be charged; when establishing a charging connection with the power supply device based on the first antenna, receiving a first radio frequency signal returned by the power supply device at a target transmission power, and a specific absorption rate (SAR) value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold; when establishing a charging connection with the power supply device based on the second antenna, receiving a second radio frequency signal returned by the power supply device at a target transmission power, and a SAR value of the second radio frequency signal at the second antenna is greater than a preset SAR threshold; and controlling switching between the first antenna and the second antenna using a time-sharing charging strategy so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to the preset SAR threshold, thereby increasing the transmission power of the power supply device and improving charging performance.

Description

Technical Field

[0001] The present application relates to the field of wireless charging technology, and in particular to a charging control method, apparatus, device, and computer-readable storage medium. Background Art

[0002] With the continuous advancement of electronic technology, electronic devices, such as smartphones, have become an integral part of people's daily lives. Smartphones typically require power supplies such as chargers and power banks to charge them. To meet the charging needs of smartphones, the maximum transmit power requirements for these power supplies are increasing. Higher transmit power means greater radiation exposure, which can be harmful to the human body.

[0003] To protect human health and safety, electronic devices both domestically and internationally must meet the Specific Absorption Rate (SAR) compliance requirements for electromagnetic radiation. In related technologies, when the measured SAR value is greater than the preset SAR threshold of the regional safety standard, SAR compliance requirements are usually ensured by directly limiting the maximum transmit power. However, if the maximum transmit power is limited, the charging current and charging speed will also be limited accordingly, which will increase the charging time and affect the charging performance. Summary of the Invention

[0004] This application proposes a charging control method, apparatus, device, and computer-readable storage medium, which can increase the transmission power of the power supply equipment, shorten the charging time, and thus improve the charging performance while meeting the SAR compliance requirements.

[0005] The technical solution of this application is achieved as follows:

[0006] In a first aspect, an embodiment of the present application provides a charging control method, which is applied to a device to be charged, and the device to be charged includes at least a first antenna and a second antenna; the method includes:

[0007] Establishing a charging connection with a power supply device based on the first antenna or the second antenna;

[0008] When establishing a charging connection with the power supply device based on the first antenna, receiving a first radio frequency signal returned by the power supply device at a target transmit power, and the SAR value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold;

[0009] When establishing a charging connection with the power supply device based on the second antenna, receiving a second radio frequency signal returned by the power supply device at a target transmit power, and the SAR value of the second radio frequency signal at the second antenna is greater than a preset SAR threshold;

[0010] During the charging process, the time-sharing charging strategy is used to control the switching between the first antenna and the second antenna, so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to the preset SAR threshold.

[0011] In a second aspect, an embodiment of the present application provides a charging control method, applied to a power supply device, the method comprising:

[0012] Establishing a charging connection with a first antenna or a second antenna in a device to be charged;

[0013] When establishing a charging connection with a first antenna in a device to be charged, determining a first transmission parameter, and controlling the power supply device to transmit a first radio frequency signal to the device to be charged at a target transmission power according to the first transmission parameter, with the first radio frequency signal focused at the first antenna;

[0014] When establishing a charging connection with a second antenna in the device to be charged, determining a second transmission parameter, and controlling the power supply device to transmit a second radio frequency signal to the device to be charged at a target transmission power according to the second transmission parameter, with the second radio frequency signal focused at the second antenna;

[0015] During the charging process, the device to be charged uses a time-sharing charging strategy to switch the first antenna and the second antenna to achieve an average SAR value at the first antenna and an average SAR value at the second antenna within a preset time period that is less than or equal to a preset SAR threshold.

[0016] In a third aspect, an embodiment of the present application provides a charging control device, which is applied to a device to be charged. The charging control device includes a transceiver unit and a control unit; wherein,

[0017] The transceiver unit is configured to establish a charging connection with the power supply device based on the first antenna or the second antenna in the device to be charged; and when establishing the charging connection with the power supply device based on the first antenna, receive a first radio frequency signal returned by the power supply device at a target transmit power, and the SAR value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold; when establishing the charging connection with the power supply device based on the second antenna, receive a second radio frequency signal returned by the power supply device at the target transmit power, and the SAR value of the second radio frequency signal at the second antenna is greater than a preset SAR threshold;

[0018] The control unit is configured to control the switching between the first antenna and the second antenna using a time-sharing charging strategy during the charging process, so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to a preset SAR threshold.

[0019] In a fourth aspect, an embodiment of the present application provides a charging control device, which is applied to a power supply device. The charging control device includes a transceiver unit and a control unit; wherein,

[0020] a transceiver unit configured to establish a charging connection with the first antenna or the second antenna in the device to be charged;

[0021] The control unit is configured to determine a first transmission parameter when establishing a charging connection with the first antenna in the device to be charged through the transceiver unit; and control the power supply device to transmit a first radio frequency signal to the device to be charged at a target transmission power according to the first transmission parameter, with the first radio frequency signal focused on the first antenna;

[0022] The control unit is further configured to determine a second transmission parameter when establishing a charging connection with the second antenna in the device to be charged through the transceiver unit, and control the power supply device to transmit a second radio frequency signal to the device to be charged at a target transmission power according to the second transmission parameter, with the second radio frequency signal focused on the second antenna;

[0023] During the charging process, the device to be charged uses a time-sharing charging strategy to switch the first antenna and the second antenna to achieve an average SAR value at the first antenna and an average SAR value at the second antenna within a preset time period that is less than or equal to a preset SAR threshold.

[0024] In a fifth aspect, an embodiment of the present application provides an electronic device, the electronic device including a memory and a processor; wherein,

[0025] a memory for storing computer programs capable of running on the processor;

[0026] A processor is configured to execute the method described in the first aspect or the method described in the second aspect when running a computer program.

[0027] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by at least one processor, implements the method as described in the first aspect or the method as described in the second aspect.

[0028] Embodiments of the present application provide a charging control method, apparatus, device, and computer-readable storage medium. These methods establish a charging connection with a power supply device based on a first antenna or a second antenna in a device to be charged. When establishing the charging connection with the power supply device based on the first antenna, the power supply device determines a first transmission parameter and, based on the first transmission parameter, controls the power supply device to transmit a first radio frequency signal to the device to be charged at a target transmission power, such that the first radio frequency signal is focused at the first antenna and the SAR value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold. When establishing the charging connection with the power supply device based on the second antenna, the power supply device determines a second transmission parameter and, based on the second transmission parameter, controls the power supply device to transmit a second radio frequency signal to the device to be charged at the target transmission power, such that the second radio frequency signal is focused at the second antenna and the SAR value of the second radio frequency signal at the second antenna is greater than a preset SAR threshold. Thus, during charging of the device to be charged, a time-sharing charging strategy is used to control switching between the first and second antennas, such that the average SAR value at the first and second antennas within a preset time period is less than or equal to the preset SAR threshold. That is to say, the embodiment of the present application can increase the transmission power of the power supply device so that the SAR value at the first antenna or the SAR value at the second antenna is greater than the preset SAR threshold; however, due to the increase in the number of antennas, the charging time using each antenna within the preset time period becomes shorter, and accordingly the average SAR value at each antenna will also decrease; on the premise of meeting the SAR compliance requirements, the transmission power of the power supply device can be increased, the charging time can be shortened, and the charging performance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the composition structure of a WPT system;

[0030] Figure 2A A schematic diagram of the working principle of a WPT system;

[0031] Figure 2B This is a schematic diagram of the working principle of another WPT system;

[0032] Figure 3A A schematic diagram of the structure of a transceiver circuit of a device under test;

[0033] Figure 3B A schematic diagram of antenna positions in a device under test;

[0034] Figure 3C A schematic diagram of the SAR value distribution of antennas in a device under test;

[0035] Figure 4 A schematic diagram of a curve representing the relationship between time and power;

[0036] Figure 5 A schematic diagram of an application scenario of a WPT system;

[0037] Figure 6 A flow chart of a charging control method provided in an embodiment of the present application;

[0038] Figure 7A A schematic diagram of an application scenario of a WPT system provided in an embodiment of the present application;

[0039] Figure 7B A schematic diagram of another application scenario of a WPT system provided in an embodiment of the present application;

[0040] Figure 8 A schematic diagram of another application scenario of a WPT system provided in an embodiment of the present application;

[0041] Figure 9 A schematic diagram of another application scenario of a WPT system provided in an embodiment of the present application;

[0042] Figure 10 A flow chart of another charging control method provided in an embodiment of the present application;

[0043] Figure 11 A schematic diagram of the structure of a charging control device provided in an embodiment of the present application;

[0044] Figure 12 A schematic diagram of the specific hardware structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0047] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0048] It should also be pointed out that the terms "first\second\third" involved in the embodiments of the present application are only used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described here can be implemented in an order other than that illustrated or described here.

[0049] The Specific Absorption Rate (SAR) refers to the amount of electromagnetic radiation energy absorbed by a material per unit mass per unit time. It is an important parameter for measuring the impact of radiation generated by electronic devices with antennas, such as smartphones and PDAs, on the human body. A higher SAR value indicates a greater amount of electromagnetic radiation energy absorbed by the human body, and thus a greater risk of harm. A lower SAR value indicates a lesser amount of electromagnetic radiation energy absorbed by the human body, and thus a lesser risk of harm. To reduce harm to the human body, the SAR value of electronic devices needs to be limited to meet regulatory compliance requirements.

[0050] It is understandable that wireless charging is a popular charging technology at present. It removes the limitation of charging cables and makes charging electronic devices more convenient. In the Wireless Power Transfer (WPT) system, the RF wireless charging here is to convert the RF power into DC current through a rectifier, and then charge the battery or directly power the components in the electronic device. For example, Figure 1 A schematic diagram of the structure of a WPT system is shown. Figure 1 As shown, the WPT system may include two modules, namely a power supply device 101 and a device to be charged 102. The power supply device 101 may be hung on a wall of a room, and the device to be charged 102 is located in the room.

[0051] In the embodiments of this application, the power supply device 101 may also be referred to as a "WPT Source" and is used to provide RF power; the device to be charged 102 may also be referred to as a "WPT Client" and represents the electronic device to be charged. Furthermore, in some embodiments, the power supply device 101 may also be represented by transceiver B, and the device to be charged 102 may also be represented by transceiver A.

[0052] In the embodiment of the present application, time reversal refers to the transformation in which the spatial coordinates remain unchanged and the time coordinates change their signs. The basic working principle of the WPT system based on time reversal is as follows: Figure 2A and Figure 2B As shown. Figure 2AAs shown, the device to be charged 102 first transmits a beacon signal omnidirectionally, but only a part of the Beacon signal reaches the power supply device 101 after direct / reflection. Then the power supply device 101 adjusts the parameters of its transmission signal according to the signal received from the device to be charged 102, so that the transmission signal of the power supply device 101 is sent in the reverse direction along the path of the transmission signal of the device to be charged 102, that is, Figure 2B The paths shown specifically include 5 direct paths and 4 reflected paths, so that the transmission signal of the power supply device 101 can be focused at the device to be charged 102 (energy is concentrated at the device to be charged 102).

[0053] Ideally, the signal energy transmitted by power supply device 101, after direct or reflected transmission, is focused on the antenna of device 102. The higher the energy concentration, the higher the signal transmission efficiency. Currently, the energy focusing area can be approximately 4 cm x 4 cm.

[0054] In the embodiment of the present application, the WPT system based on time reversal mainly includes the following functional modules: a radio frequency signal transmitter on the WPTSource side, a wireless communication system (for communication between the WPT Source and the WPT Client), and a Beacon signal transmitting antenna on the WPTClient side.

[0055] Since the parameters of the WPT Source's transmitted signal are partially derived from the WPT Client's Beacon signal, they will change as the characteristics of the received Beacon signal change. For example, if the WPT Client moves, the WPT Source will update the parameters of the transmitted signal so that the WPT Source's transmitted signal is refocused at the WPT Client's new location.

[0056] It's important to note that because the WPT Source transmits radio frequency signals, countries and regions around the world regulate the SAR values ​​of wireless signal transmitters. The WPT Source is no exception. Because the WPT Source's transmitted signal is concentrated at the WPT Client's charging and receiving antenna, the maximum SAR value occurs in this energy-focused area. Outside of this energy-focused area, the SAR value is almost negligible due to the extremely low radio frequency energy.

[0057] It's also important to note that SAR is an internationally recognized indicator for assessing the impact of radio waves on the human body. It's a safety indicator, strictly regulated by regulatory agencies worldwide. It's expressed in watts per kilogram (W / Kg). Currently, the two mainstream international standards are 1.6W / Kg set by the Federal Communications Commission (FCC) in the United States and 2.0W / Kg set by the European Union (Conformite Europeenne, CE). The SAR value is strongly correlated with parameters such as RF transmit power, antenna efficiency, and antenna radiation pattern. It's directly proportional to conducted power; higher conducted power indicates higher SAR values. Currently, the most common approach in the industry to address excessive SAR values ​​is to reduce RF power (specifically, power backoff).

[0058] SAR regulatory agencies in different regions have slightly different requirements for electromagnetic wave signals of different frequencies. For example, the FCC requires that for radio frequency signals below 3GHz, the average SAR value within any 100-second time period must not exceed the upper limit of 1.6W / Kg. However, the real-time SAR value can exceed 1.6W / Kg. It is only necessary to ensure that the average SAR value within the time window required by the regulation (for example, 100 seconds for the FCC) is controlled within the regulatory range.

[0059] In a specific embodiment, Figure 3A The figure shows a schematic diagram of the structure of the transceiver circuit of a device under test (DUT). Figure 3B Figure 1 shows a schematic diagram of antenna positions in a DUT. Figure 3A As shown, it may include: antenna 1, transceiver 100, power amplifier module 101, and low noise amplifier (LNA) 104. Transceiver 100 represents the transceiver, which can control the signal transmission frequency and the power level of the input power amplifier (PA); power amplifier module 101 represents the power amplifier module in the transmission link; low noise amplifier 104 represents the LNA in the reception link; and DUT represents the two-dimensional plane of a smartphone, where antenna 1 represents the position of the antenna in the DUT.

[0060] Here, for a given conducted power and antenna state, the SAR hotspot location (the location of the highest SAR value) is fixed, the SAR distribution is fixed (it is a gradient distribution), and the SAR value (specifically the maximum SAR value) is also fixed. For example, Figure 3C A schematic diagram of the SAR value distribution of antennas in the DUT is shown.

[0061] like Figure 3C As shown, for antenna 1, the dashed ellipse in the upper left portion of the DUT can be interpreted as a distribution of equal SAR values. Ellipses represent equal SAR values; the further outward the ellipse, the lower the SAR value. Higher RF power indicates a higher SAR hotspot value (i.e., the center of the dashed ellipse); lower RF power indicates a lower SAR hotspot value. Regulatory agencies require that the highest SAR value (average SAR value) not exceed regulatory requirements, such as 1.6W / Kg for the FCC and 2.0W / Kg for CE.

[0062] Time-averaged SAR technology dynamically adjusts the DUT's conducted transmit power, ensuring that the average SAR does not exceed the specified value within a longer time window. Compared to the fixed backoff RF power approach used in related technologies (assuming the DUT's maximum transmit power is 23dBm, when the SAR backoff mechanism is activated or triggered, the DUT's transmit power backs off by a fixed backoff value, such as 3dB; after the backoff, the RF power remains at 20dBm), the time-averaged SAR mechanism allows the DUT to transmit at a power higher than the upper power limit (represented by Plimit) in certain time periods and at a power lower than Plimit in certain time periods, but the average power within a certain time window is ≤ Plimit. It should be noted that Plimit here refers to the RF power corresponding to the upper limit of the SAR value. If the RF power exceeds Plimit, the corresponding SAR will exceed the upper limit.

[0063] For example, Figure 4 A curve diagram showing the relationship between time and power is shown. Figure 4 As shown in the figure, the horizontal axis represents time in seconds (s); the vertical axis represents power in decibels relative to one milliwatt (dBm). The solid line represents real-time power; the dashed line represents average power; and the bold solid line represents the power limit (denoted by Plimit). This shows that the time-averaged SAR mechanism allows transmission at powers above Plimit in some time periods and below Plimit in other time periods, but the average power within a certain time window must be ≤ Plimit.

[0064] Simply put, current WPT systems and WPT sources ensure SAR compliance by directly limiting the maximum transmit power. However, once the maximum transmit power is limited, the charging current and speed are also restricted, increasing charging time and severely impacting the real-time user experience.

[0065] In addition, in the current WPT system, the WPT Client can only support one antenna for charging. If the position of the WPT Client does not change, the SAR value of the WPT Source at the WPT Client antenna position will always be at its maximum. In order to ensure that the SAR does not exceed the requirements of the regulatory agency, the transmission power of the WPT Source can only be limited. Figure 5 , the direct signal and reflected signal emitted by the power supply device (WPT Source) 101 are focused at the device to be charged (WPT Client) 102, and the dotted circle at the antenna 1 of the device to be charged 102 represents the energy focusing area of ​​the RF power.

[0066] Based on this, an embodiment of the present application provides a charging control method, which increases the number of antennas in the device to be charged, specifically from one antenna to at least two antennas (such as a first antenna and a second antenna). In this way, during the process of the power supply device charging the device to be charged, even if the transmission power of the power supply device is increased, the first antenna and the second antenna are controlled to switch by a time-sharing charging strategy, so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to the preset SAR threshold. In other words, the embodiment of the present application can increase the transmission power of the power supply device so that its SAR value at the first antenna or the SAR value at the second antenna is greater than the preset SAR threshold; however, due to the increase in the number of antennas, the charging time of each antenna within the preset time period becomes shorter, and accordingly the average SAR value at each antenna will also decrease; in this way, under the premise of meeting the SAR compliance requirements, the transmission power of the power supply device can be increased, the charging time can be shortened, and the charging performance can be improved.

[0067] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0068] In one embodiment of the present application, see Figure 6 , which shows a flow chart of a charging control method provided by an embodiment of the present application. Figure 6 As shown, the method may include:

[0069] S601: Establishing a charging connection with a power supply device based on a first antenna or a second antenna in the device to be charged.

[0070] It should be noted that in the embodiments of the present application, the charging control method is applied to a device to be charged, and the device to be charged includes at least a first antenna and a second antenna. Specifically, a wireless charging solution is provided herein, whereby a power supply device charges through multiple antennas of the device to be charged, and a multi-antenna averaging method is used to meet SAR compliance requirements.

[0071] In this way, when the power supply device is charging the device to be charged, a charging connection can be established with the power supply device through the first antenna or the second antenna. Since charging can be performed through either the first antenna or the second antenna during the charging process, the energy borne by each antenna can be reduced by switching between the first antenna and the second antenna, that is, the average SAR value at each antenna can be reduced, thereby meeting SAR compliance requirements.

[0072] S602: When establishing a charging connection with a power supply device based on a first antenna, receiving a first radio frequency signal returned by the power supply device at a target transmit power, and a SAR value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold.

[0073] S603: When establishing a charging connection with the power supply device based on the second antenna, receiving a second radio frequency signal returned by the power supply device at a target transmit power, and a SAR value of the second radio frequency signal at the second antenna is greater than a preset SAR threshold.

[0074] In an embodiment of the present application, in addition to the first antenna, the device to be charged also has a second antenna for charging. In a first time period, for the first antenna, a charging connection can be established with the power supply device based on the first antenna, so as to receive the first RF signal returned by the power supply device at the target transmission power, and the SAR value of the first RF signal at the first antenna is greater than the preset SAR threshold; in a second time period, for the second antenna, a charging connection can be established with the power supply device based on the second antenna, so as to receive the second RF signal returned by the power supply device at the target transmission power, and the SAR value of the second RF signal at the second antenna is greater than the preset SAR threshold. In other words, the target transmission power of the power supply device can be focused on the two antennas of the device to be charged (the first antenna and the second antenna) in a time-sharing manner.

[0075] In the embodiments of the present application, the preset SAR threshold value represents a pre-set value that meets SAR compliance requirements. For example, under FCC regulations, the preset SAR threshold value may be 1.6 W / Kg; or under CE regulations, the preset SAR threshold value may be 2.0 W / Kg.

[0076] In some embodiments, when establishing a charging connection with a power supply device based on the first antenna, the method may further include:

[0077] transmitting a beacon signal to the power supply device via the first antenna;

[0078] Based on the beacon signal, a first transmission path between the power supply device and the device to be charged is determined; wherein the first transmission path is used to transmit a first radio frequency signal returned by the power supply device at a target transmission power.

[0079] It should be noted that in the embodiment of the present application, the beacon signal is a Beacon signal. The device to be charged transmits the Beacon signal omnidirectionally through the first antenna, and the power supply device can receive the Beacon signal transmitted by the first antenna; then, based on the received Beacon signal, the first transmission path between the power supply device and the device to be charged can be determined, so that the power supply device can return the first radio frequency signal along the first transmission path. Here, the first transmission path may include a reflection path and a direct path, so that the first radio frequency signal correspondingly includes a first reflected signal and a first direct signal.

[0080] Furthermore, in some embodiments, receiving the first radio frequency signal returned by the power supply device at the target transmit power may include:

[0081] After receiving an initial radio frequency signal returned by the power supply device at an initial transmission power, determining an initial SAR value of the initial radio frequency signal at the first antenna;

[0082] The transmit power of the power supply device is controlled and adjusted according to the initial SAR value so that the adjusted transmit power is the target transmit power, and a first radio frequency signal returned by the power supply device at the target transmit power is received through the first transmission path.

[0083] It should also be noted that in the embodiment of the present application, after receiving the Beacon signal, the power supply device can determine the first transmission parameter, and then the power supply device can perform power transmission according to the first transmission parameter. For example, assuming that the transmission power determined at this time is the initial transmission power, and the initial RF signal returned according to the initial transmission power, the SAR value of the initial RF signal at the first antenna is the initial SAR value, which can be represented by SAR1.

[0084] Furthermore, by adjusting the transmit power of the power supply device, the SAR value at the first antenna can be made greater than the preset SAR threshold. For example, the transmit power of the power supply device can be adjusted so that the SAR value at the first antenna is equal to 2 times the preset SAR threshold, and the SAR value at this time is recorded as SAR2. For example, if the preset SAR threshold is 1.6W / Kg, then the transmit power of the power supply device needs to be adjusted to ensure that its SAR2 value at the first antenna is 3.2W / Kg, and the target transmit power at this time is recorded as P1. In other words, the power supply device can transmit a first radio frequency signal to the device to be charged at a transmit power of P1, so that the SAR value of the first radio frequency signal at the first antenna is greater than the preset SAR threshold.

[0085] In some embodiments, when establishing a charging connection with the power supply device based on the second antenna, the method may further include:

[0086] transmitting a beacon signal to the power supply device via the second antenna;

[0087] A second transmission path between the power supply device and the device to be charged is determined based on the beacon signal; wherein the second transmission path is used to transmit a second radio frequency signal returned by the power supply device at a target transmission power.

[0088] It should be noted that in the embodiment of the present application, the first antenna can also be switched to the second antenna, and then the power supply device transmits a second RF signal to the device to be charged at the same transmission power. Here, it should be noted that the device to be charged needs to first transmit a beacon signal to the power supply device through the second antenna in order to determine the second transmission path between the power supply device and the device to be charged, so that along the second transmission path, the second RF signal transmitted by the power supply device can be focused on the second antenna. Here, the second transmission path can also include a reflected path and a direct path, so that the second RF signal correspondingly includes a second reflected signal and a second direct signal.

[0089] It should also be noted that in the embodiment of the present application, the power supply device transmits a second RF signal to the device to be charged at the same transmission power P1, so that the SAR value at the second antenna is also equal to SAR2 (the transmission power remains unchanged, but the energy focus area is switched from the first antenna to the second antenna). In this way, the power supply device can transmit a second RF signal to the device to be charged at the transmission power P1, so that the SAR value of the second RF signal at the second antenna is also greater than the preset SAR threshold.

[0090] S604: During the process of the power supply device charging the device to be charged, the first antenna and the second antenna are controlled to switch using a time-sharing charging strategy, so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to a preset SAR threshold.

[0091] In the embodiments of the present application, the time-averaged SAR technology specifically refers to a technology that ensures that the average SAR value meets the SAR compliance requirements within a time window. Here, the length of the time window is the preset time period. In actual applications, the preset period can be determined based on the period of the preset SAR threshold calculated by the regulatory agency in the region where the charging device is located. For example, the preset time period can be 6 minutes, but this is not a specific limitation.

[0092] In an embodiment of the present application, the average SAR value may be reset to zero after each preset time period, and the average SAR value may be recalculated in the next preset period, so that the calculated average SAR value is less than or equal to the preset SAR threshold.

[0093] It should also be noted that in the embodiments of the present application, the first antenna and the second antenna can be switched in a time-sharing manner while the power supply device is charging the device to be charged. Specifically, in some embodiments, controlling the switching between the first antenna and the second antenna using a time-sharing charging strategy may include: controlling the switching between the first antenna and the second antenna at a preset switching frequency within a preset time period.

[0094] That is to say, in the embodiment of the present application, the power supply device continues to transmit at a transmission power of the size of P1, but the device to be charged needs to switch to the first antenna or the second antenna for charging in a time-sharing manner. For example, the frequency of switching antennas (i.e., the preset switching frequency) can be maintained at a certain frequency, such as 10 Hz, that is, switching 10 times per second; or it can be that the first antenna is used for charging in the first time period, and then the second antenna is switched to for charging in the second time period, for example, the first time period and the second time period are respectively half of the preset time period. Here, the time-sharing charging strategy is specifically set according to the actual situation, and the embodiment of the present application does not impose any limitation on this.

[0095] In this way, the actual charging time for each antenna is less than 100%. Assuming that the two antennas share the charging time equally within the preset time period, that is, the actual charging time for each antenna is only 50%; then the average SAR value at each antenna is only equal to 1 / 2×SAR2, so that within the time window required by the regulation, the average SAR value of each antenna will meet the SAR compliance requirements.

[0096] For example, Figure 7A A schematic diagram of an application scenario of a WPT system provided in an embodiment of the present application is shown. Figure 7B FIG. 1 shows another application scenario diagram of a WPT system provided by an embodiment of the present application. In the first time period, as shown in FIG. Figure 7A As shown, at this time, the power supply device is connected to the antenna 1 in the device to be charged, and its first transmission path includes Figure 7A The reflected signal 1 and the direct signal 1 shown in the figure make the first radio frequency signal emitted by the power supply device focus on the antenna 1. In the second time period, as shown in the figure Figure 7B As shown, at this time, the power supply device is connected to the antenna 2 in the device to be charged, and its second transmission path includes Figure 7B The reflected signal 2 and the direct signal 2 shown cause the second radio frequency signal emitted by the power supply device to be focused on the antenna 2 .

[0097] Here, whether it is Figure 7A still Figure 7BThe power supply device continuously transmits at the same transmit power, but the device to be charged switches between antenna 1 and antenna 2 at different time periods, so that the power supply device's transmit power is focused on the two antennas of the device to be charged (antenna 1 and antenna 2) in different time periods. In this way, by adding a charging antenna to the device to be charged, the power supply device's transmit power can be increased while ensuring SAR compliance requirements, providing faster charging time.

[0098] Furthermore, for the two antennas in the device to be charged, in some embodiments, the energy focusing area at the first antenna does not overlap with the energy focusing area at the second antenna; or, the SAR value corresponding to the overlapping area of ​​the energy focusing area at the first antenna and the energy focusing area at the second antenna is less than or equal to a preset SAR threshold.

[0099] It should be noted that if Figure 7A or Figure 7B As shown, antenna 1 and antenna 2 can be located relatively far apart. Here, the distance is such that the energy focus areas of the two antennas do not overlap. However, the present embodiment is also applicable to scenarios where the antennas are relatively close. It is only necessary to ensure that the SAR value corresponding to the overlapping area of ​​the energy focus areas of the two antennas does not exceed the SAR compliance requirement.

[0100] For example, for a smartphone waiting to be charged, as terminal technology develops, it is becoming increasingly miniaturized. Due to the limited space in a smartphone, there is no room for the two antennas to be relatively far apart. In this case, the two antennas need to be relatively close. Figure 8 FIG. 1 shows another application scenario diagram of a WPT system provided by an embodiment of the present application. Figure 8 As shown, antenna 1 and antenna 2 are relatively close, and the focusing area of ​​antenna 1 overlaps with the focusing area of ​​antenna 2. However, it is only necessary to ensure that the SAR value corresponding to the overlapping area of ​​energy focus of the two antennas does not exceed the SAR compliance requirement. Compared with related technologies using a single antenna, the embodiments of the present application can still increase the transmission power of the power supply device while ensuring SAR compliance requirements, providing faster charging time.

[0101] Furthermore, for the device to be charged, the embodiment of the present application can be expanded to three or more antennas. The greater the number of antennas, the lower the average SAR value at each antenna, and the greater the possibility for the power supply device to increase its transmit power. In other words, the greater the number of antennas, the higher the target transmit power of the power supply device can be, i.e., there is a correlation between the target transmit power and the number of antennas included in the device to be charged.

[0102] Furthermore, taking the example that the device to be charged also includes a third antenna, in some embodiments, the method may also include: during the charging process, using a time-sharing charging strategy to control the switching of the first antenna, the second antenna and the third antenna, so that within a preset time period, the average SAR value at the first antenna, the average SAR value at the second antenna and the average SAR value at the third antenna are all less than or equal to a preset SAR threshold.

[0103] In a specific embodiment, the method may further include:

[0104] When establishing a charging connection with the power supply device based on the third antenna, transmitting a beacon signal to the power supply device via the third antenna, and determining a third transmission path between the power supply device and the device to be charged based on the beacon signal;

[0105] A third radio frequency signal returned by the power supply device at a target transmission power is received through a third transmission path, and a SAR value of the third radio frequency signal at the third antenna is greater than a preset SAR threshold.

[0106] It should be noted that in the embodiment of the present application, not only the switching between the first antenna and the second antenna can be performed, but also the switching between the first antenna, the second antenna and the third antenna can be performed. When establishing a charging connection with the power supply device based on the third antenna, the power supply device can also transmit a third radio frequency signal to the device to be charged at the same transmission power. Here, it should be noted that the device to be charged needs to first transmit a beacon signal to the power supply device through the third antenna in order to determine the third transmission path between the power supply device and the device to be charged, so that along the third transmission path, the third radio frequency signal transmitted by the power supply device can be focused on the third antenna. Here, the third transmission path may also include a reflected path and a direct path, so that the third radio frequency signal correspondingly includes a third reflected signal and a third direct signal.

[0107] For example, Figure 9 FIG. 1 shows another application scenario diagram of a WPT system provided by an embodiment of the present application. In the third time period, as shown in FIG. Figure 9 As shown, at this time, the power supply device is connected to the antenna 3 in the device to be charged, and the third transmission path includes Figure 9 The reflected signal 3 and the direct signal 3 shown cause the third radio frequency signal emitted by the power supply device to be focused on the antenna 3 .

[0108] It should be noted that in the embodiments of the present application, the third antenna is merely illustrative, and may include a fourth antenna, a fifth antenna, a sixth antenna, and so on, without any limitation. The more antennas a power supply device has, the more a time-sharing charging strategy can be used to control switching among these antennas, reducing the charging time at each antenna so that the average SAR value at each antenna within a preset time period is less than or equal to a preset SAR threshold. That is, the lower the average SAR value of the power supply device's transmitted energy on the device to be charged, the greater the possibility for the power supply device to increase its transmit power, thereby increasing the charging power and speeding up the charging time.

[0109] This embodiment provides a charging control method, which is applied to a device to be charged. Based on the first antenna or the second antenna in the device to be charged, a charging connection is established with the power supply device. During the process of the power supply device charging the device to be charged, the first antenna and the second antenna are controlled to switch by using a time-sharing charging strategy, so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to a preset SAR threshold. In other words, the embodiment of the present application can increase the transmission power of the power supply device so that its SAR value at the first antenna or the SAR value at the second antenna is greater than the preset SAR threshold; however, due to the increase in the number of antennas, the charging time of each antenna within the preset time period becomes shorter, and accordingly, the average SAR value at each antenna will also decrease; under the premise of meeting the SAR compliance requirements, the transmission power of the power supply device can be increased, the charging time can be shortened, and thus the charging performance can be improved.

[0110] In another embodiment of the present application, see Figure 10 , which shows a flow chart of another charging control method provided by an embodiment of the present application. Figure 10 As shown, the method may include:

[0111] S1001: The power supply device establishes a charging connection with the first antenna or the second antenna in the device to be charged.

[0112] It should be noted that in the embodiments of the present application, the charging control method is applied to a power supply device. Specifically, a wireless charging solution is provided, in which the power supply device charges the device through multiple antennas of the device to be charged, and uses a multi-antenna averaging method to meet SAR compliance requirements.

[0113] In this way, when the power supply device is charging the device to be charged, a charging connection can be established with the power supply device through the first antenna or the second antenna of the device to be charged. Since charging can be performed through either the first antenna or the second antenna during the charging process, the energy borne by each antenna can be reduced by switching between the first antenna and the second antenna, that is, the average SAR value at each antenna can be reduced, thereby meeting SAR compliance requirements.

[0114] S1002: When establishing a charging connection with a first antenna in a device to be charged, determine a first transmission parameter, and control the power supply device to transmit a first radio frequency signal to the device to be charged at a target transmission power according to the first transmission parameter, with the first radio frequency signal focused at the first antenna.

[0115] S1003: When establishing a charging connection with a second antenna in the device to be charged, determine a second transmission parameter, and control the power supply device to transmit a second radio frequency signal to the device to be charged at a target transmission power according to the second transmission parameter, with the second radio frequency signal focused on the second antenna.

[0116] It should also be noted that, in the embodiment of the present application, during the charging process, the device to be charged uses a time-sharing charging strategy to switch the first antenna and the second antenna to achieve that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to a preset SAR threshold.

[0117] In some embodiments, when establishing a charging connection with a first antenna in a device to be charged, determining a first transmission parameter may include:

[0118] receiving a beacon signal transmitted by a first antenna;

[0119] Based on the beacon signal, a first transmission parameter is determined; wherein the first transmission parameter may include at least: a target transmission power and a first transmission path, and the first transmission path is used to achieve focusing of the first radio frequency signal on the first antenna.

[0120] In some embodiments, when establishing a charging connection with a second antenna in a device to be charged, determining the second transmission parameter may include:

[0121] receiving a beacon signal transmitted by the second antenna;

[0122] Based on the beacon signal, second transmission parameters are determined; wherein the second transmission parameters may include at least: target transmission power and a second transmission path, and the second transmission path is used to achieve focusing of the second radio frequency signal on the second antenna.

[0123] It should be noted that in the embodiment of the present application, whether connected to the first antenna or the second antenna for charging, the power supply device continuously transmits at the same target transmit power. By adjusting the charging time of each antenna, the average SAR value at each antenna can be made less than or equal to the preset SAR threshold.

[0124] It should also be noted that in the embodiment of the present application, if the power supply device is connected to the first antenna of the device to be charged, then the first transmission parameter of the power supply device can be determined based on the received beacon signal, and the first RF signal can be focused on the first antenna based on the first transmission parameter. Similarly, if the power supply device is connected to the second antenna of the device to be charged, then the second transmission parameter of the power supply device can be determined based on the received beacon signal, and the second RF signal can be focused on the second antenna based on the second transmission parameter.

[0125] Furthermore, in some embodiments, when the two antennas of the device to be charged are switched, the method may further include:

[0126] When switching from the first antenna to the second antenna for charging connection, controlling the transmission parameters of the power supply device to switch from the first transmission parameters to the second transmission parameters; or,

[0127] When switching from the second antenna to the first antenna for charging connection, the transmission parameters of the power supply device are controlled to switch from the second transmission parameters to the first transmission parameters.

[0128] That is to say, the device to be charged switches its first antenna and second antenna for charging respectively, and the corresponding power supply device will also change the transmission parameters following the antenna switching of the device to be charged (wherein the size of the transmission power remains unchanged), so that the transmission power of the power supply device is focused on the two antennas of the device to be charged (the first antenna and the second antenna) in a time-sharing manner.

[0129] Furthermore, in some embodiments, for the target transmit power, the method may further include:

[0130] Determining a target transmit power based on a preset mapping relationship between SAR values ​​and transmit powers, wherein the SAR value corresponding to the target transmit power is greater than a preset SAR threshold;

[0131] The transmission power of the power supply device is adjusted so that the adjusted transmission power is the target transmission power, and the first radio frequency signal or the second radio frequency signal is transmitted to the device to be charged at the target transmission power.

[0132] It should be noted that in this embodiment of the present application, the power supply device may pre-store a preset mapping relationship between SAR values ​​and transmit power. If the SAR value of the device to be charged at a certain antenna is expected to meet SAR2, the transmit power of the power supply device needs to be adjusted to the target transmit power corresponding to SAR2. The power supply device can then transmit at the target transmit power to ensure that the SAR value at that antenna meets SAR2.

[0133] Furthermore, for the device to be charged, the embodiments of the present application can be expanded to include three or more antennas. Taking the case where the device to be charged also includes a third antenna, in some embodiments, the method can further include: determining a third transmission parameter when establishing a charging connection with the third antenna in the device to be charged, and controlling the power supply device to transmit a third radio frequency signal to the device to be charged at a target transmission power based on the third transmission parameter, such that the third radio frequency signal is focused on the third antenna.

[0134] In this embodiment of the present application, the third transmission parameters may include at least a target transmit power and a third transmission path, where the third transmission path is used to focus the third RF signal on the third antenna. In other words, if the power supply device is connected to the third antenna of the device to be charged, the third transmission parameters of the power supply device can be determined based on the received beacon signal, and the third RF signal can be focused on the third antenna based on the third transmission parameters.

[0135] In this way, during the charging process, the time-sharing charging strategy is used to control the switching of the first antenna, the second antenna, and the third antenna, so that within the preset time period, the average SAR value at the first antenna, the average SAR value at the second antenna, and the average SAR value at the third antenna are all less than or equal to the preset SAR threshold, so that the average SAR value at each antenna does not exceed the SAR compliance requirement.

[0136] This embodiment provides a charging control method, which is applied to a power supply device. A charging connection is established between the power supply device and the first antenna or the second antenna in the device to be charged. When the charging connection is established with the first antenna in the device to be charged, a first transmission parameter is determined, and the power supply device is controlled to transmit a first radio frequency signal to the device to be charged at a target transmission power according to the first transmission parameter, with the first radio frequency signal focused at the first antenna. When the charging connection is established with the second antenna in the device to be charged, a second transmission parameter is determined, and the power supply device is controlled to transmit a second radio frequency signal to the device to be charged at a target transmission power according to the second transmission parameter, with the second radio frequency signal focused at the second antenna. In this way, during the charging process of the device to be charged, the first antenna and the second antenna are controlled to switch using a time-sharing charging strategy, so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to a preset SAR threshold. That is to say, the embodiment of the present application can increase the transmission power of the power supply device so that the SAR value at the first antenna or the SAR value at the second antenna is greater than the preset SAR threshold; however, due to the increase in the number of antennas, the charging time using each antenna within the preset time period becomes shorter, and accordingly the average SAR value at each antenna will also decrease; on the premise of meeting the SAR compliance requirements, the transmission power of the power supply device can be increased, the charging time can be shortened, and the charging performance can be improved.

[0137] In another embodiment of the present application, based on the charging control method described in the above embodiment, taking the device to be charged as WPT Client and the power supply device as WPT Source as an example, the embodiment of the present application proposes adding a radio frequency antenna for charging to the WPT Client. Figure 7A and Figure 7B As shown, the two antennas (antenna 1 and antenna 2) can be located relatively far apart. The farther distance can be determined by ensuring that the radio frequency energy focusing ranges of the two antennas do not intersect.

[0138] In a specific embodiment, the working principle is as follows:

[0139] 01.WPT Client transmits Beacon signal through antenna 1.

[0140] 02. The WPT Source receives the Beacon signal transmitted by Antenna 1 and determines the transmission parameters of the WPT Source signal based on the received Beacon signal.

[0141] 03. The WPT Source transmits power using the transmission parameters determined in step 02. Assume that the SAR value of the WPT Client receiving antenna 1 corresponding to this transmission power is SAR1.

[0142] 04. Adjust the WPT Source's transmit power so that the SAR value at the WPT Client's antenna 1 is twice the regulatory requirement. Record this SAR value as SAR2. For example, if the FCC requirement is 1.6 W / kg, adjust the WPT Source's power to ensure that the SAR2 value at the WPT Client's antenna 1 is 3.2 W / kg. Record this WPT Source transmit power as P1.

[0143] 05. With the same WPT Source transmission power P1, the SAR value at Antenna 2 is also equal to SAR2 (the transmission power remains unchanged, only the energy focus area switches from Antenna 1 to Antenna 2).

[0144] 06. The WPT Source continues to transmit at a power of P1.

[0145] 07. The WPT Client switches between antennas 1 and 2 for charging. The WPT Source also changes its transmission parameters (the transmission power remains unchanged at P1) according to the WPT Client's antenna switching. This allows the WPT Source's transmission power to be focused on the two antennas of the WPT Client (antenna 1 and antenna 2) in a time-sharing manner.

[0146] 08. The WPT client antenna switching frequency must be maintained at a certain frequency, such as 10 Hz (switching 10 times per second). For each WPT client antenna, its actual charging time is only 50%. In other words, the average SAR value at each WPT client antenna is only equal to 1 / 2 * SAR2. Within the regulatory time window, the average SAR value of each antenna will meet the regulatory requirements.

[0147] Furthermore, in this embodiment of the present application, the method of this embodiment of the present application can be expanded to three or more WPT client antennas. The more antennas there are, the lower the average value of the WPT source's transmitted energy on the WPT client, leaving more room for WPT power to be increased.

[0148] Furthermore, in the embodiment of the present application, the method of the embodiment of the present application is also applicable to the scenario where the antennas are relatively close. In this case, it is only necessary to ensure that the SAR value of the overlapping area where the energy of the two antennas is focused does not exceed the regulatory requirements.

[0149] The above embodiments have been used to illustrate the specific implementation of the aforementioned embodiments in detail. According to the technical solutions of the aforementioned embodiments, it can be seen that by adding a charging antenna to the WPT Client and switching between two antennas during charging, with each antenna operating only 50% of the time, the power of the WPT Source can be more dispersed at the WPT Client, and the corresponding average SAR value can be reduced. While meeting regulatory requirements, the WPT Source's transmit power can be increased, thereby increasing the charging power and speeding up the charging time. In other words, by adding a charging antenna to the WPT Client, the WPT Source's transmit power can be increased while ensuring SAR compliance, providing faster charging times.

[0150] In another embodiment of the present application, based on the same inventive concept as the above embodiment, see Figure 11 , which shows a schematic diagram of the composition structure of a charging control device provided by an embodiment of the present application. Figure 11 As shown, the charging control device 110 may include a transceiver unit 1101 and a control unit 1102 .

[0151] In a specific embodiment, the charging control device 110 is applied to a device to be charged.

[0152] The transceiver unit 1101 is configured to establish a charging connection with the power supply device based on the first antenna or the second antenna in the device to be charged; and when establishing a charging connection with the power supply device based on the first antenna, receive a first radio frequency signal returned by the power supply device at a target transmit power, and the SAR value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold; when establishing a charging connection with the power supply device based on the second antenna, receive a second radio frequency signal returned by the power supply device at a target transmit power, and the SAR value of the second radio frequency signal at the second antenna is greater than a preset SAR threshold;

[0153] The control unit 1102 is configured to control the switching between the first antenna and the second antenna using a time-sharing charging strategy during the charging process, so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to a preset SAR threshold.

[0154] In some embodiments, the transceiver unit 1101 is further configured to transmit a beacon signal to the power supply device through the first antenna when establishing a charging connection with the power supply device based on the first antenna; and determine a first transmission path between the power supply device and the device to be charged based on the beacon signal; wherein the first transmission path is used to transmit the first radio frequency signal returned by the power supply device at a target transmission power.

[0155] In some embodiments, the transceiver unit 1101 is further configured to determine the initial SAR value of the initial RF signal at the first antenna after receiving the initial RF signal returned by the power supply device at the initial transmission power; and control the transmission power of the power supply device to adjust according to the initial SAR value, so that the adjusted transmission power is the target transmission power, and receive the first RF signal returned by the power supply device at the target transmission power through the first transmission path.

[0156] In some embodiments, the transceiver unit 1101 is further configured to transmit a beacon signal to the power supply device through the second antenna when establishing a charging connection with the power supply device based on the second antenna; and determine a second transmission path between the power supply device and the device to be charged based on the beacon signal; wherein the second transmission path is used to transmit a second radio frequency signal returned by the power supply device at a target transmission power.

[0157] In some embodiments, the control unit 1102 is further configured to control the first antenna and the second antenna to switch according to a preset switching frequency within a preset time period.

[0158] In some embodiments, the energy focusing area at the first antenna does not overlap with the energy focusing area at the second antenna; or, the SAR value corresponding to the overlapping area of ​​the energy focusing area at the first antenna and the energy focusing area at the second antenna is less than or equal to a preset SAR threshold.

[0159] In some embodiments, the device to be charged also includes a third antenna; accordingly, the control unit 1102 is also configured to control the switching of the first antenna, the second antenna and the third antenna using a time-sharing charging strategy during the charging process, so that the average SAR value at the first antenna, the average SAR value at the second antenna and the average SAR value at the third antenna within a preset time period are all less than or equal to a preset SAR threshold.

[0160] In some embodiments, the transceiver unit 1101 is further configured to transmit a beacon signal to the power supply device through the third antenna when establishing a charging connection with the power supply device based on the third antenna, and determine a third transmission path between the power supply device and the device to be charged based on the beacon signal; and receive a third radio frequency signal returned by the power supply device at a target transmission power through the third transmission path, and the SAR value of the third radio frequency signal at the third antenna is greater than a preset SAR threshold.

[0161] In some embodiments, the target transmission power is correlated with the number of antennas included in the device to be charged.

[0162] In another specific embodiment, the charging control device 110 is applied to a power supply device.

[0163] The transceiver unit 1101 is configured to establish a charging connection with the first antenna or the second antenna in the device to be charged;

[0164] The control unit 1102 is configured to determine a first transmission parameter when establishing a charging connection with a first antenna in the device to be charged through the transceiver unit; and control the power supply device to transmit a first radio frequency signal to the device to be charged at a target transmission power according to the first transmission parameter, with the first radio frequency signal focused on the first antenna;

[0165] The control unit 1102 is further configured to determine a second transmission parameter when establishing a charging connection with the second antenna in the device to be charged through the transceiver unit, and control the power supply device to transmit a second radio frequency signal to the device to be charged at a target transmission power according to the second transmission parameter, with the second radio frequency signal focused on the second antenna;

[0166] During the charging process, the device to be charged uses a time-sharing charging strategy to switch the first antenna and the second antenna to achieve an average SAR value at the first antenna and an average SAR value at the second antenna within a preset time period that is less than or equal to a preset SAR threshold.

[0167] In some embodiments, the transceiver unit 1101 is further configured to receive a beacon signal transmitted by the first antenna when a charging connection is established with the first antenna in the device to be charged; and determine a first transmission parameter based on the beacon signal; wherein the first transmission parameter includes at least: a target transmission power and a first transmission path, and the first transmission path is used to achieve focusing of the first radio frequency signal at the first antenna.

[0168] In some embodiments, the transceiver unit 1101 is further configured to receive a beacon signal transmitted by the second antenna when a charging connection is established with the second antenna in the device to be charged; and determine a second transmission parameter based on the beacon signal; wherein the second transmission parameter includes at least: a target transmission power and a second transmission path, and the second transmission path is used to achieve focusing of the second radio frequency signal at the second antenna.

[0169] In some embodiments, the transceiver unit 1101 is further configured to determine the target transmit power based on a mapping relationship between a preset SAR value and the transmit power, wherein the SAR value corresponding to the target transmit power is greater than a preset SAR threshold; and adjust the transmit power of the power supply device so that the adjusted transmit power is the target transmit power, and transmit the first RF signal or the second RF signal to the device to be charged at the target transmit power.

[0170] In some embodiments, the control unit 1102 is further configured to control the transmission parameters of the power supply device to switch from the first transmission parameters to the second transmission parameters when switching from the first antenna to the second antenna for charging connection; or, when switching from the second antenna to the first antenna for charging connection, control the transmission parameters of the power supply device to switch from the second transmission parameters to the first transmission parameters.

[0171] In some embodiments, the device to be charged also includes a third antenna. Accordingly, the control unit 1102 is further configured to determine a third transmission parameter when establishing a charging connection with the third antenna in the device to be charged, and control the power supply device to transmit a third radio frequency signal to the device to be charged at a target transmission power according to the third transmission parameter, and make the third radio frequency signal focused at the third antenna; wherein the third transmission parameter includes at least: the target transmission power and the third transmission path, and the third transmission path is used to achieve the third radio frequency signal focusing at the third antenna.

[0172] It is understood that in this embodiment, a "unit" can be a portion of a circuit, a portion of a processor, a portion of a program or software, etc., and can also be a module or a non-modular system. Furthermore, the various components in this embodiment can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit. The aforementioned integrated units can be implemented in the form of hardware or software functional modules.

[0173] If the integrated unit is implemented as a software functional module and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment, or the portion that contributes to the prior art, or all or part 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 for causing a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method described in this embodiment. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0174] Therefore, this embodiment provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by at least one processor, the steps of the method in any one of the above embodiments are implemented.

[0175] Based on the composition of the charging control device 110 and the computer readable storage medium, see Figure 12 , which shows a schematic diagram of the specific hardware structure of an electronic device provided by an embodiment of the present application. Figure 12 As shown, the electronic device 120 may include: a communication interface 1201, a memory 1202 and a processor 1203; each component is coupled together via a bus system 1204. It is understood that the bus system 1204 is used to achieve connection and communication between these components. In addition to the data bus, the bus system 1204 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, Figure 12 Various buses are labeled as bus system 1204.

[0176] In a specific embodiment, the electronic device 120 may be a device to be charged. In this case, the electronic device 120 includes at least a first antenna and a second antenna, and can establish a charging connection with a power supply device through the first antenna or the second antenna, so that the power supply device can charge the device to be charged.

[0177] Communication interface 1201, used for sending and receiving signals during the process of sending and receiving information with other external network elements (e.g., power supply equipment);

[0178] Memory 1202, used to store computer programs that can be run on processor 1203;

[0179] Processor 1203 is configured to, when running the computer program, execute:

[0180] Establishing a charging connection with a power supply device based on the first antenna or the second antenna;

[0181] When establishing a charging connection with the power supply device based on the first antenna, receiving a first radio frequency signal returned by the power supply device at a target transmit power, and the SAR value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold;

[0182] When establishing a charging connection with the power supply device based on the second antenna, receiving a second radio frequency signal returned by the power supply device at a target transmit power, and the SAR value of the second radio frequency signal at the second antenna is greater than a preset SAR threshold;

[0183] During the charging process, the time-sharing charging strategy is used to control the switching between the first antenna and the second antenna, so that the average SAR value at the first antenna and the average SAR value at the second antenna within a preset time period are both less than or equal to the preset SAR threshold.

[0184] In another specific embodiment, the electronic device 120 may be a power supply device, and the electronic device 120 establishes a charging connection with the first antenna or the second antenna in the device to be charged, so as to charge the device to be charged.

[0185] The communication interface 1201 is used to receive and send signals during the process of sending and receiving information with other external network elements (e.g., the first electronic device);

[0186] Memory 1202, used to store computer programs that can be run on processor 1203;

[0187] Processor 1203 is configured to, when running the computer program, execute:

[0188] Establishing a charging connection with a first antenna or a second antenna in a device to be charged;

[0189] When establishing a charging connection with a first antenna in a device to be charged, determining a first transmission parameter, and controlling the power supply device to transmit a first radio frequency signal to the device to be charged at a target transmission power according to the first transmission parameter, with the first radio frequency signal focused at the first antenna;

[0190] When establishing a charging connection with a second antenna in the device to be charged, determining a second transmission parameter, and controlling the power supply device to transmit a second radio frequency signal to the device to be charged at a target transmission power according to the second transmission parameter, with the second radio frequency signal focused at the second antenna;

[0191] During the charging process, the device to be charged uses a time-sharing charging strategy to switch the first antenna and the second antenna to achieve an average SAR value at the first antenna and an average SAR value at the second antenna within a preset time period that is less than or equal to a preset SAR threshold.

[0192] It is understood that the memory 1202 in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDRSDRAM), enhanced synchronous DRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DRRAM). The memory 1202 of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0193] The processor 1203 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits or software instructions in the processor 1203. The above-mentioned processor 1203 can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of this application can be directly implemented as a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, etc. The storage medium is located in the memory 1202 , and the processor 1203 reads the information in the memory 1202 and completes the steps of the above method in combination with its hardware.

[0194] It is also understood that the embodiments described herein may be implemented using hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit may be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described herein, or a combination thereof.

[0195] For software implementation, the techniques described herein can be implemented by modules (e.g., procedures, functions, etc.) that perform the functions described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

[0196] Optionally, as another embodiment, the processor 1203 is further configured to execute the steps of the method in any one of the aforementioned embodiments when running the computer program.

[0197] It should be noted that, in this application, when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory may be integrated into the processor. In addition, the memory described in this application is intended to include, but is not limited to, these and any other suitable types of memory.

[0198] It should also be noted that, in this application, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0199] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0200] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0201] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0202] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0203] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A charging control method, characterized in that: The method is applied to a device to be charged, and the device to be charged includes at least a first antenna and a second antenna; the method includes: Establishing a charging connection with a power supply device based on the first antenna or the second antenna; When establishing a charging connection with the power supply device based on the first antenna, receiving a first radio frequency signal returned by the power supply device at a target transmit power, and a specific absorption rate (SAR) value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold; When establishing a charging connection with the power supply device based on the second antenna, receiving a second radio frequency signal returned by the power supply device at the target transmit power, and the SAR value of the second radio frequency signal at the second antenna is greater than the preset SAR threshold; and the specific absorption rate (SAR) value of the first radio frequency signal at the first antenna is equal to the SAR value of the second radio frequency signal at the second antenna; During the charging process, a time-sharing charging strategy is used to control switching between the first antenna and the second antenna so that an average SAR value at the first antenna and an average SAR value at the second antenna within a preset time period are both less than or equal to a preset SAR threshold; The receiving of the first radio frequency signal returned by the power supply device at the target transmit power includes: After receiving an initial radio frequency signal returned by the power supply device at an initial transmission power, determining an initial SAR value of the initial radio frequency signal at the first antenna; The transmit power of the power supply device is controlled and adjusted according to the initial SAR value and a preset mapping relationship between the SAR value and the transmit power, so that the adjusted transmit power is the target transmit power, and the first radio frequency signal returned by the power supply device at the target transmit power is received through the first transmission path, wherein the SAR value corresponding to the target transmit power is greater than the preset SAR threshold, and the more antennas the device to be charged includes, the greater the target transmit power.

2. The method according to claim 1, characterized in that When establishing a charging connection with the power supply device based on the first antenna, the method further includes: transmitting a beacon signal to the power supply device via the first antenna; Based on the beacon signal, a first transmission path between the power supply device and the device to be charged is determined; wherein the first transmission path is used to transmit the first radio frequency signal returned by the power supply device at a target transmission power.

3. The method according to claim 1, characterized in that When establishing a charging connection with the power supply device based on the second antenna, the method further includes: transmitting a beacon signal to the power supply device via the second antenna; A second transmission path between the power supply device and the device to be charged is determined based on the beacon signal; wherein the second transmission path is used to transmit the second radio frequency signal returned by the power supply device at the target transmission power.

4. The method according to claim 1, wherein The controlling the switching between the first antenna and the second antenna by using a time-sharing charging strategy includes: During the preset time period, the first antenna and the second antenna are controlled to switch according to a preset switching frequency.

5. The method according to any one of claims 1 to 4, characterized in that The energy focusing area at the first antenna does not overlap with the energy focusing area at the second antenna; or, A SAR value corresponding to an overlapping area of ​​the energy focusing area at the first antenna and the energy focusing area at the second antenna is less than or equal to the preset SAR threshold.

6. The method according to any one of claims 1 to 4, characterized in that The device to be charged further includes a third antenna; and the method further includes: During the charging process, a time-sharing charging strategy is used to control switching among the first antenna, the second antenna, and the third antenna, so that within a preset time period, an average SAR value at the first antenna, an average SAR value at the second antenna, and an average SAR value at the third antenna are all less than or equal to a preset SAR threshold.

7. The method according to claim 6, characterized in that The method further comprises: When establishing a charging connection with the power supply device based on the third antenna, transmitting a beacon signal to the power supply device through the third antenna, and determining a third transmission path between the power supply device and the device to be charged based on the beacon signal; A third radio frequency signal returned by the power supply device at the target transmission power is received through the third transmission path, and a SAR value of the third radio frequency signal at the third antenna is greater than the preset SAR threshold.

8. The method according to claim 6, characterized in that There is a correlation between the target transmission power and the number of antennas included in the device to be charged.

9. A charging control method, characterized in that: Applied to power supply equipment, the method includes: Establishing a charging connection with a first antenna or a second antenna in a device to be charged; When establishing a charging connection with a first antenna in the device to be charged, determining a first transmission parameter, and controlling the power supply device to transmit a first radio frequency signal to the device to be charged at a target transmission power according to the first transmission parameter, with the first radio frequency signal focused at the first antenna; When establishing a charging connection with the second antenna in the device to be charged, determining second transmission parameters, and controlling the power supply device to transmit a second radio frequency signal to the device to be charged at the target transmission power according to the second transmission parameters, with the second radio frequency signal focused at the second antenna; and a specific absorption rate (SAR) value of the first radio frequency signal at the first antenna is equal to a SAR value of the second radio frequency signal at the second antenna; During the charging process, the device to be charged switches the first antenna and the second antenna using a time-sharing charging strategy to achieve an average SAR value at the first antenna and an average SAR value at the second antenna within a preset time period that is less than or equal to a preset SAR threshold; The method further comprises: Sending an initial radio frequency signal to the device to be charged, and determining an initial SAR value of the initial radio frequency signal at the first antenna; Determining the target transmit power based on the initial SAR value and a preset mapping relationship between the SAR value and the transmit power, wherein the SAR value corresponding to the target transmit power is greater than the preset SAR threshold, and the more antennas the device to be charged includes, the greater the target transmit power; The transmission power of the power supply device is adjusted so that the adjusted transmission power is the target transmission power, and the first radio frequency signal or the second radio frequency signal is transmitted to the device to be charged at the target transmission power.

10. The method according to claim 9, characterized in that When establishing a charging connection with a first antenna in the device to be charged, determining a first transmission parameter includes: receiving a beacon signal transmitted by the first antenna; Based on the beacon signal, the first transmission parameter is determined; wherein the first transmission parameter includes at least: the target transmission power and a first transmission path, and the first transmission path is used to achieve the first radio frequency signal focusing at the first antenna.

11. The method according to claim 9, characterized in that When establishing a charging connection with the second antenna in the device to be charged, determining the second transmission parameter includes: receiving a beacon signal transmitted by the second antenna; Based on the beacon signal, the second transmission parameters are determined; wherein the second transmission parameters include at least: the target transmission power and a second transmission path, and the second transmission path is used to achieve the second radio frequency signal focusing at the second antenna.

12. The method according to any one of claims 9 to 11, characterized in that The method further comprises: When switching from the first antenna to the second antenna for charging connection, controlling the transmission parameters of the power supply device to switch from the first transmission parameters to the second transmission parameters; or, When switching from the second antenna to the first antenna for charging connection, the transmission parameters of the power supply device are controlled to switch from the second transmission parameters to the first transmission parameters.

13. The method according to claim 9, characterized in that The device to be charged further includes a third antenna, and the method further includes: When establishing a charging connection with a third antenna in the device to be charged, determining a third transmission parameter, and controlling the power supply device to transmit a third radio frequency signal to the device to be charged at the target transmission power according to the third transmission parameter, so that the third radio frequency signal is focused on the third antenna; The third transmission parameter includes at least: the target transmission power and a third transmission path, and the third transmission path is used to achieve focusing of the third radio frequency signal on the third antenna.

14. A charging control device, characterized in that: Applied to a device to be charged, the charging control device includes a transceiver unit and a control unit; wherein, The transceiver unit is configured to establish a charging connection with the power supply device based on the first antenna or the second antenna in the device to be charged; and when establishing a charging connection with the power supply device based on the first antenna, receive a first radio frequency signal returned by the power supply device at a target transmit power, and the SAR value of the first radio frequency signal at the first antenna is greater than a preset SAR threshold; when establishing a charging connection with the power supply device based on the second antenna, receive a second radio frequency signal returned by the power supply device at the target transmit power, and the SAR value of the second radio frequency signal at the second antenna is greater than the preset SAR threshold; the specific absorption rate SAR value of the first radio frequency signal at the first antenna is equal to the SAR value of the second radio frequency signal at the second antenna; The control unit is configured to control the switching between the first antenna and the second antenna using a time-sharing charging strategy during the charging process, so that the average SAR value at the first antenna and the average SAR value at the second antenna are both less than or equal to the preset SAR threshold within a preset time period; The transceiver unit is further configured to, after receiving an initial RF signal returned by the power supply device at an initial transmit power, determine an initial SAR value of the initial RF signal at the first antenna; control the transmit power of the power supply device to adjust according to the initial SAR value and a preset mapping relationship between the SAR value and the transmit power, so that the adjusted transmit power is the target transmit power; and receive the first RF signal returned by the power supply device at the target transmit power through the first transmission path, wherein the SAR value corresponding to the target transmit power is greater than the preset SAR threshold, and the more antennas the device to be charged includes, the greater the target transmit power.

15. A charging control device, characterized in that: Applied to power supply equipment, the charging control device includes a transceiver unit and a control unit; wherein, The transceiver unit is configured to establish a charging connection with the first antenna or the second antenna in the device to be charged; The control unit is configured to determine a first transmission parameter when establishing a charging connection with the first antenna in the device to be charged through the transceiver unit; and control the power supply device to transmit a first radio frequency signal to the device to be charged at a target transmission power according to the first transmission parameter, with the first radio frequency signal focused at the first antenna; The control unit is further configured to, when a charging connection is established with the second antenna in the device to be charged through the transceiver unit, determine a second transmission parameter, and control the power supply device to transmit a second radio frequency signal to the device to be charged at the target transmission power according to the second transmission parameter, and the second radio frequency signal is focused at the second antenna; the specific absorption rate (SAR) value of the first radio frequency signal at the first antenna is equal to the SAR value of the second radio frequency signal at the second antenna; During the charging process, the device to be charged switches the first antenna and the second antenna using a time-sharing charging strategy to achieve an average SAR value at the first antenna and an average SAR value at the second antenna within a preset time period that is less than or equal to a preset SAR threshold; The transceiver unit is further configured to send an initial radio frequency signal to the device to be charged, determine an initial SAR value of the initial radio frequency signal at the first antenna; determine the target transmit power based on the initial SAR value and a preset mapping relationship between the SAR value and the transmit power, wherein the SAR value corresponding to the target transmit power is greater than the preset SAR threshold, and the more antennas the device to be charged includes, the greater the target transmit power; adjust the transmit power of the power supply device so that the adjusted transmit power is the target transmit power, and transmit the first radio frequency signal or the second radio frequency signal to the device to be charged at the target transmit power.

16. An electronic device, characterized in that: comprising a memory and a processor; wherein, The memory is used to store a computer program that can be run on the processor; The processor is configured to execute the method according to any one of claims 1 to 8 or the method according to any one of claims 9 to 13 when running the computer program.

17. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by at least one processor, the method according to any one of claims 1 to 8 or the method according to any one of claims 9 to 13 is implemented.

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