A wireless charging method, device and system

Abstract

The embodiment of the present application discloses a wireless charging method, device and system. The method includes: adjusting the transmission power value of the charging signal; transmitting the charging signal according to the adjusted transmission power value so that the power value of the charging signal received by the device to be charged meets the preset power reference value.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of wireless power transmission, and in particular to a wireless charging method, device and system. Background Art

[0002] At present, wireless charging technology has been widely used in products such as mobile phones, watches, bracelets, Bluetooth headsets and even electric vehicles. Wireless charging technology can be divided into two types: low-power wireless charging and high-power wireless charging. Low-power wireless charging often uses electromagnetic induction, such as charging mobile phones; high-power wireless charging often uses resonance, such as charging electric vehicles. Since the charger and the power device transmit power through the magnetic field, there is no need for wires to connect the two, which makes it more convenient to charge the power device and makes the appearance design of the power device more beautiful.

[0003] Due to the convenience of wireless charging and the popularity of smart devices, how to charge smart devices more efficiently is an urgent problem to be solved. Summary of the invention

[0004] In order to solve any of the above technical problems, the embodiments of the present application provide a wireless charging method, device and system.

[0005] In order to achieve the purpose of the embodiment of the present application, the embodiment of the present application provides a wireless charging method, including:

[0006] Adjust the transmission power value of the charging signal;

[0007] The charging signal is transmitted according to the adjusted transmission power value, so that the power value of the charging signal received by the device to be charged meets the preset power reference value.

[0008] A wireless charging device, comprising:

[0009] An adjustment module, used to adjust the transmission power value of the charging signal;

[0010] The transmitting module is used to transmit the charging signal according to the adjusted transmitting power value, so that the power value of the charging signal received by the device to be charged meets the preset power reference value.

[0011] A storage medium stores a computer program, wherein the computer program is configured to execute the method when running.

[0012] An electronic device comprises a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to execute the method.

[0013] A wireless charging system comprises the wireless charging device and a device to be charged.

[0014] One of the above technical solutions has the following advantages or beneficial effects:

[0015] By adjusting the transmission power value of the charging signal, the device to be charged can be charged based on the power reference value, ensuring the stability of the charging current received by the device to be charged. In addition, since the device to be charged is charged based on the power reference value, the charging time is reduced compared with the prior art in which the power is charged at a value lower than the power reference value in some time periods.

[0016] Other features and advantages of the embodiments of the present application will be described in the subsequent description, and partly become apparent from the description, or can be understood by implementing the embodiments of the present application. The purpose and other advantages of the embodiments of the present application can be achieved and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide further understanding of the technical solutions of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the embodiments of the present application, they are used to explain the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0018] Figure 1(a) is a schematic diagram of the path of a beacon signal;

[0019] Figure 1(b) is a schematic diagram of the path of the charging signal;

[0020] FIG2( a ) is a schematic diagram of a radio frequency transmission path of a charging signal at a first position;

[0021] FIG2( b ) is a schematic diagram of a radio frequency transmission path of a charging signal at a second location;

[0022] Figure 3 Schematic diagram of a wireless charging system 100

[0023] Figure 4 A flowchart of a wireless charging method provided in Embodiment 1 of the present application;

[0024] FIG5( a ) is a flow chart of a wireless charging method provided in Embodiment 2 of the present application;

[0025] FIG5( b ) is a schematic diagram of the radio frequency signal transmission and reception of the device to be charged 20 ;

[0026] Figure 6 A flowchart of a wireless charging method provided in Embodiment 3 of the present application;

[0027] Figure 7 A schematic diagram of the structure of a wireless charging device 10 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application more clear, the embodiments of the present application will be described in detail in conjunction with the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily.

[0029] Wireless Power Transfer (WPT) converts radio frequency power into direct current through a rectifier, which is then used to charge the battery or directly power the components of electronic devices.

[0030] The WPT system includes: a WPT source (Source), as a power provider (Power Provider), used to provide radio frequency power; and a WPT client (Client), as a power receiver (Power Receiver), used to receive radio frequency power.

[0031] The WPT Client has a built-in antenna for charging, which transmits beacon signals omnidirectionally. Part of the signal reaches the WPT Source after direct or reflected radiation. The signal path is shown in Figure 1(a).

[0032] The WPT Source adjusts the transmission parameters of the charging signal according to the received beacon signal, so that the charging signal transmitted by the WPT Source can be sent in the reverse direction along the path of the WPT Client's transmission signal, that is, the path shown in Figure 1(b). Since the energy of the WPT Source's transmission signal is focused on the antenna of the WPT Client after direct / reflection, the purpose of concentrating the transmission energy on the WPT Client is achieved. Among them, the higher the degree of energy concentration at the antenna of the WPT Client, the higher the transmission efficiency of the WPTSource.

[0033] 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 charging signal is focused again at the new position of the WPT Client.

[0034] At time t1, the WPT Client is at the first position, and the RF transmission path is shown in Figure 2(a). At time t2, the WPT Client is at the second position, and the RF transmission path is shown in Figure 2(b).

[0035] From the RF transmission paths shown in FIG2( a ) and FIG2( b ), it can be seen that the focus position of the charging signal changes at the WPT Client.

[0036] Similarly, when the RF transmission path between the WPT Client and the WPT Source is blocked by an object, the focus position of the charging signal at the WPT Client changes.

[0037] In response to the above situation where the focus position changes, the beacon signal sent by the current charging antenna can be used to determine the new focus position.

[0038] Specifically, under the premise that the power of the beacon signal output by the charging antenna of the WTP Client remains unchanged, if the charging antenna is blocked or held, the beacon signal strength received by the WTP Source will be reduced. Therefore, it is necessary to readjust the parameters of the charging signal it transmits so as to achieve focusing at the new position of the WTP Client.

[0039] Since the transmitted signal is a radio frequency signal, countries / regions around the world control the specific absorption rate (SAR) of wireless signal transmitting devices. SAR is an internationally used indicator for evaluating the impact of radio waves on the human body and is strictly regulated by regulatory agencies in countries / regions around the world. Currently, the maximum value of SAR can be 1.6W / Kg or 2.0W / Kg.

[0040] Specifically, for electromagnetic wave signals of different frequencies, the SAR regulatory agencies in different regions have slightly different requirements. For example, for radio frequency signals with frequencies 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 regulations is within the range required by the regulations.

[0041] The charging signal emitted by the WPT Source is received centrally by the charging antenna of the WPT Client. Therefore, the maximum SAR value is located in the energy focus area. In other areas except the energy focus area, the SAR value is almost negligible due to the extremely low energy of the RF signal. The SAR value in the energy focus area is related to the signal transmission power. The higher the transmission power, the higher the SAR value.

[0042] The solution to the problem of SAR exceeding the standard is to reduce the transmission power of the RF signal.

[0043] In the WPT system, the SAR value compliance can be ensured by limiting the maximum value of the WPT Source's transmission power.

[0044] In the process of implementing this application, it was found that the above method has the following problems:

[0045] If the maximum transmission power of the WPT Source is limited, when the position of the WPT Client changes, the position of the WPT Client from the WPT Source will change, causing the power value corresponding to the charging signal received by the WPT Client to change, resulting in unstable charging current and reduced charging efficiency.

[0046] Taking Figure 2(a) and Figure 2(b) as examples, the transmission power of the charging signal emitted by the WTP Source is fixed to control the SAR maximum value in the energy concentration area on the WPT Client to meet the regulations.

[0047] When the WPT Client is in the first position, the power value of the received charging signal is P1, and the charging current value is C1. If the WPT Client moves from the first position to the second position, the distance between the WPT Client and the WPT Source will increase. Since the charging signal emitted by the WPT Source will attenuate as the spatial distance increases, and the radio frequency energy will also attenuate due to being absorbed by media such as air, when the WPT Client is in the second position, the power value of the received charging signal is less than P1, and the charging current value is less than C1, that is, the WPT Client charges at a relatively low efficiency, which reduces the charging speed and prolongs the charging time.

[0048] In addition, if the WPT Client has multiple antennas for charging, the WTP Source can switch to other antennas on the WPT Client to continue charging after detecting that the signal transmission strength of the current antenna has decreased. Since the charging efficiency of different antennas is different, when the antenna is switched, the charging current may be unstable and the charging efficiency may be reduced.

[0049] For example, a WTP Client has two antennas. If the charging efficiency of antenna 1 is higher than that of antenna 2, the WPT Client will use antenna 1 for wireless charging, and the transmission value of the received charging signal is P1, and the charging current value is C1. When the charging efficiency of antenna 1 becomes low due to being blocked, the WPT Client will switch to antenna 2 for charging. Since the transmission power of the charging signal emitted by the WTP Source is fixed, and the charging efficiency of antenna 2 is lower than that of antenna 1, the power value of the charging signal received by the WPT Client is less than P1, and the charging current value is less than C1, that is, charging is performed at a relatively low efficiency, which reduces the charging speed and prolongs the charging time.

[0050] Based on the above technical problems, the embodiments of the present application provide the following solutions:

[0051] Figure 3 Schematic diagram of wireless charging system 100. Figure 3 As shown, the wireless charging system 100 includes a wireless charging device 10 and a device to be charged 20, wherein:

[0052] The wireless charging device 10 may be a WPT Source, including a first charging module 11 and a beacon receiving module 12; wherein:

[0053] The first charging module 11 is used to convert the current into a charging signal and output it in the form of a radio frequency signal;

[0054] The beacon receiving module 12 is used to receive the beacon signal omnidirectionally transmitted by the device to be charged.

[0055] The device to be charged 20 may be a WPT Client including a second charging module 21 and a beacon transmitting module 22; wherein:

[0056] A second charging module 21, used to convert the charging signal received by the antenna into a direct current;

[0057] The beacon transmitting module 22 is used to transmit beacon signals omnidirectionally using the current charging antenna.

[0058] Figure 4 This is a flow chart of the wireless charging method provided in Example 1 of the present application. Figure 4 As shown, applied to a wireless charging device 10, the method includes:

[0059] Step 401: adjusting the transmission power value of the charging signal;

[0060] Unlike the prior art, the transmission power of the charging signal of the wireless charging device 10 is not fixed, but can be dynamically adjusted, so that the transmission power value of the charging signal can adapt to the antenna receiving performance of the device to be charged 20 or the distance between the device to be charged 20 and the wireless charging device 10, while ensuring that the SAR value of the charging signal received by the device to be charged 20 meets the regulations, thereby improving the stability of the received charging signal.

[0061] Specifically, the transmit power value may be adjusted periodically, or may be adjusted when a preset condition is met, such as when a control instruction to adjust the power value is received.

[0062] Furthermore, when the following conditions are met, the transmission power value of the charging signal is adjusted, including:

[0063] Condition 1: It is detected that the power of the charging signal received by the device to be charged 20 changes;

[0064] Specifically, if the power value of the charging signal received by the device to be charged 20 decreases, it means that the power value of the charging signal received by the device to be charged 20 needs to be increased, that is, the current transmission power value of the wireless charging device 10 can no longer meet the demand, then the transmission power value of the charging signal is increased, thereby achieving the purpose of increasing the power value of the charging signal received by the device to be charged 20; conversely, if the power value of the charging signal received by the device to be charged increases, it means that the power value of the charging signal received by the device to be charged 20 needs to be reduced, that is, the current transmission power value of the wireless charging device 10 exceeds the demand, then the transmission power value of the charging signal is reduced, thereby achieving the purpose of reducing the power value of the charging signal received by the device to be charged 20.

[0065] Condition 2: It is detected that the charging antenna of the device to be charged 20 is switched from one antenna to another.

[0066] The antenna switching of the device to be charged may be an indication signal sent by an antenna, indicating that the charging efficiency of the antenna is reduced; for example, the charging efficiency of the antenna is reduced due to being blocked (such as being held by a user). Alternatively, it is through receiving an indication signal sent by another antenna, indicating that the charging efficiency of the other antenna is higher than that of the antenna; for example, the charging efficiency of the other antenna is restored after the blocking object disappears, and the charging efficiency of the other antenna after restoration is higher than that of the antenna.

[0067] Specifically, when the charging efficiency of the other antenna is lower than that of the first antenna, if the wireless charging device 10 continues to transmit the charging signal with the current transmission power, the power value of the charging signal received by the other antenna will become smaller. Therefore, it is necessary to increase the transmission power value of the charging signal, so as to achieve the purpose of increasing the power value of the charging signal received by the device to be charged 20; similarly, when the charging efficiency of the other antenna is higher than that of the first antenna, if the wireless charging device 10 continues to transmit the charging signal with the current transmission power, the power value of the charging signal received by the other antenna will become larger. Therefore, it is necessary to reduce the transmission power value of the charging signal, so as to achieve the purpose of reducing the power value of the charging signal received by the device to be charged 20.

[0068] Adjusting the transmission power of the charging signal based on the above trigger conditions can improve management efficiency and ensure that a reasonable transmission power is set for the wireless charging device 20 .

[0069] Step 402: transmitting the charging signal according to the adjusted transmission power value, so that the power value of the charging signal received by the device to be charged meets the preset power reference value;

[0070] The power reference value may be a maximum power value that meets SAR requirements.

[0071] By using the adjusted transmission power value to send the charging signal, the device to be charged 20 can be charged based on the maximum power that meets the SAR requirement, thereby ensuring the stability of the charging current received by the device to be charged 20. In addition, since the device to be charged 20 is charged based on the maximum power value that meets the SAR requirement, the charging time is reduced compared with charging at a power value lower than the maximum power value in some time periods in the prior art.

[0072] The method provided in the first embodiment of the present application adjusts the transmission power value of the charging signal so that the device to be charged can be charged based on the power reference value, thereby ensuring the stability of the charging current received by the device to be charged 20. In addition, since the device to be charged 20 is charged based on the power reference value, the charging time is reduced compared with the prior art in which the power is charged at a power lower than the power reference value in some time periods.

[0073] FIG5(a) is a flow chart of a wireless charging method provided in Embodiment 2 of the present application. As shown in FIG5(a), applied to a wireless charging device 10, the method includes:

[0074] Step 501: periodically receiving a beacon signal sent by the device to be charged;

[0075] FIG5(b) is a schematic diagram of the transmission and reception of the radio frequency signal of the device to be charged 20. As shown in FIG5(b), the beacon signal and the charging signal are transmitted and received alternately. The device to be charged 20 can use the beacon signal sent by the antenna currently used for charging.

[0076] Step 502: determine whether the received beacon signal is sent by the same antenna on the device to be charged;

[0077] If the received beacon signal is sent by the same antenna on the device to be charged, step 503 to step 505 are performed first, and then step 506 and step 507 are performed, and the process ends.

[0078] If the received beacon signal is not sent by the same antenna on the device to be charged, it is detected that the charging antenna of the device to be charged is switched from one antenna to another, and steps 506 and 507 are executed, and the process ends.

[0079] Step 503: record the power value of the received beacon signal;

[0080] Step 504: Obtain change information of the power value of the beacon signal;

[0081] Furthermore, in order to avoid frequent adjustment of the transmission power of the charging signal, the difference in power values ​​of adjacent beacon signals can be calculated to obtain the signal strength difference; if the signal strength difference is greater than the preset signal strength threshold, it means that the power value of the beacon signal is more obvious, and it is still considered that the power value of the beacon signal has changed; if the signal strength difference is less than or equal to the signal strength threshold, it means that the power value of the beacon signal is not obvious, and it is still considered that the power value of the beacon signal has not changed.

[0082] Step 505: Determine whether the power of the charging signal received by the device to be charged has changed according to the change information of the power value of the beacon signal;

[0083] Since the transmission power of the beacon signal of the device to be charged 20 is fixed, if the power value of the beacon signal received by the wireless charging device 10 changes, it means that the power loss value on the transmission path changes during the process of the device to be charged 20 sending the beacon signal to the wireless charging device 10. Therefore, when the wireless charging device 10 sends the charging signal to the device to be charged 20, the power of the charging signal received by the device to be charged 20 will also change.

[0084] If the power of the charging signal received by the device to be charged changes, then step 506 and step 507 are performed; otherwise, the process ends.

[0085] The wireless charging device 10 determines whether to adjust the transmission power value of the charging signal based on the beacon signal in the existing general protocol, without adding a private message, and is simple to implement.

[0086] Step 506: adjusting the transmission power value of the charging signal;

[0087] Unlike the prior art, the transmission power of the charging signal of the wireless charging device 10 is not fixed, but can be dynamically adjusted, so that the transmission power value of the charging signal can adapt to the antenna receiving performance of the device to be charged 20 or the distance between the device to be charged 20 and the wireless charging device 10, while ensuring that the SAR value of the charging signal received by the device to be charged 20 meets the regulations, thereby improving the stability of the received charging signal.

[0088] Specifically, the transmit power value may be adjusted periodically, or may be adjusted when a preset condition is met, such as when a control instruction to adjust the power value is received.

[0089] Furthermore, when the following conditions are met, the transmission power value of the charging signal is adjusted, including:

[0090] Condition 1: It is detected that the power of the charging signal received by the device to be charged 20 changes;

[0091] Specifically, if the power value of the charging signal received by the device to be charged 20 decreases, it means that the power value of the charging signal received by the device to be charged 20 needs to be increased, that is, the current transmission power value of the wireless charging device 10 can no longer meet the demand, then the transmission power value of the charging signal is increased, thereby achieving the purpose of increasing the power value of the charging signal received by the device to be charged 20; conversely, if the power value of the charging signal received by the device to be charged increases, it means that the power value of the charging signal received by the device to be charged 20 needs to be reduced, that is, the current transmission power value of the wireless charging device 10 exceeds the demand, then the transmission power value of the charging signal is reduced, thereby achieving the purpose of reducing the power value of the charging signal received by the device to be charged 20.

[0092] Condition 2: It is detected that the charging antenna of the device to be charged 20 is switched from one antenna to another.

[0093] Specifically, when the charging efficiency of the other antenna is lower than that of the first antenna, if the wireless charging device 10 continues to transmit the charging signal with the current transmission power, the power value of the charging signal received by the other antenna will become smaller. Therefore, it is necessary to increase the transmission power value of the charging signal, so as to achieve the purpose of increasing the power value of the charging signal received by the device to be charged 20; similarly, when the charging efficiency of the other antenna is higher than that of the first antenna, if the wireless charging device 10 continues to transmit the charging signal with the current transmission power, the power value of the charging signal received by the other antenna will become larger. Therefore, it is necessary to reduce the transmission power value of the charging signal, so as to achieve the purpose of reducing the power value of the charging signal received by the device to be charged 20.

[0094] Adjusting the transmission power of the charging signal based on the above trigger conditions can improve management efficiency and ensure that a reasonable transmission power is set for the wireless charging device 20 .

[0095] Step 507: transmitting the charging signal according to the adjusted transmission power value, so that the power value of the charging signal received by the device to be charged meets the preset power reference value;

[0096] The power reference value may be a maximum power value that meets SAR requirements.

[0097] By using the adjusted transmission power value to send the charging signal, the device to be charged 20 can be charged based on the maximum power that meets the SAR requirement, thereby ensuring the stability of the charging current received by the device to be charged 20. In addition, since the device to be charged 20 is charged based on the maximum power value that meets the SAR requirement, the charging time is reduced compared with charging at a power value lower than the maximum power value in some time periods in the prior art.

[0098] The method provided in the second embodiment of the present application adjusts the transmission power value of the charging signal so that the device to be charged can be charged based on the power reference value, thereby ensuring the stability of the charging current received by the device to be charged 20. In addition, since the device to be charged 20 is charged based on the power reference value, the charging time is reduced compared with the prior art that uses a power lower than the power reference value for some time periods. The wireless charging device 10 determines whether to adjust the transmission power value of the charging signal based on the beacon signal in the existing general protocol, without the need to add a new private message, and is simple to implement.

[0099] Figure 6 This is a flow chart of the wireless charging method provided in Embodiment 3 of the present application. Figure 6 As shown, applied to a wireless charging device 10, the method includes:

[0100] Step 601: Obtain a power loss value of the charging signal transmitted to the device to be charged;

[0101] The farther the distance between the wireless charging device 10 and the device to be charged 20 is, the greater the corresponding power loss value is; the closer the distance between the wireless charging device 10 and the device to be charged 20 is, the smaller the corresponding power loss value is.

[0102] The higher the charging efficiency of the antenna used for charging the device to be charged 20, the smaller the corresponding power loss value; the lower the charging efficiency of the antenna, the greater the corresponding power loss value.

[0103] Furthermore, for the same radio frequency signal, a first power value used by the charged device 20 to send the radio frequency signal and a second power value of the received radio frequency signal are respectively obtained; and a power loss value is obtained according to the first power value and the second power value.

[0104] The first power value may be a preset fixed value, or the transmission power of the radio frequency signal may be obtained by querying the transmission power of the radio frequency signal through signal interaction with the device to be charged 20 .

[0105] By calculating the difference between the first power value and the second power value, a power loss value on the transmission path between the device to be charged 20 and the wireless charging apparatus 10 can be obtained.

[0106] Preferably, the radio frequency signal is a beacon signal.

[0107] The wireless charging device 10 obtains the power loss value based on the beacon signal in the existing general protocol, without adding a private message, and is simple to implement.

[0108] Step 602: Obtain an adjusted transmit power value according to the power loss value and the power reference value;

[0109] Under the premise of ensuring that the power value of the charging signal received by the device to be charged 20 meets the power reference value, the adjusted transmission power value can be obtained by calculating the sum of the power loss value and the power reference value.

[0110] Unlike the prior art, the transmission power of the charging signal of the wireless charging device 10 is not fixed, but can be dynamically adjusted, so that the transmission power value of the charging signal can adapt to the antenna receiving performance of the device to be charged 20 or the distance between the device to be charged 20 and the wireless charging device 10, while ensuring that the SAR value of the charging signal received by the device to be charged 20 meets the regulations, thereby improving the stability of the received charging signal.

[0111] Specifically, the transmit power value may be adjusted periodically, or may be adjusted when a preset condition is met, such as when a control instruction to adjust the power value is received.

[0112] Furthermore, when the following conditions are met, the transmission power value of the charging signal is adjusted, including:

[0113] Condition 1: It is detected that the power of the charging signal received by the device to be charged 20 changes;

[0114] Condition 2: It is detected that the charging antenna of the device to be charged 20 is switched from one antenna to another.

[0115] Adjusting the transmission power of the charging signal based on the above trigger conditions can improve management efficiency and ensure that a reasonable transmission power is set for the wireless charging device 20 .

[0116] Step 603: transmitting the charging signal according to the adjusted transmission power value, so that the power value of the charging signal received by the device to be charged meets the preset power reference value;

[0117] The power reference value may be a maximum power value that meets SAR requirements.

[0118] By using the adjusted transmission power value to send the charging signal, the device to be charged 20 can be charged based on the maximum power that meets the SAR requirement, thereby ensuring the stability of the charging current received by the device to be charged 20. In addition, since the device to be charged 20 is charged based on the maximum power value that meets the SAR requirement, the charging time is reduced compared with charging at a power value lower than the maximum power value in some time periods in the prior art.

[0119] The method provided in the third embodiment of the present application adjusts the transmission power value of the charging signal so that the device to be charged can be charged based on the power reference value, thereby ensuring the stability of the charging current received by the device to be charged 20. In addition, since the device to be charged 20 is charged based on the power reference value, the charging time is reduced compared with the prior art that uses a power lower than the power reference value for some time periods. The wireless charging device 10 obtains the power loss value based on the beacon signal in the existing general protocol, and there is no need to add a private message, which is simple to implement.

[0120] The following is an explanation using the application scenarios shown in FIG. 2( a ) and FIG. 2( b ) as examples, where the power P at the device to be charged 20 is the maximum charging power that can meet the SAR compliance requirements, and the method includes:

[0121] Step 01: When the device to be charged 20 is at the first position, the device to be charged 20 transmits a Beacon signal, wherein the transmission power value of the Beacon signal is a first power value P A ;

[0122] Among them, for the wireless charging device 10, P A The value of is known and can be transmitted through the communication system, or PA Set to default value.

[0123] Step 02: The wireless charging device 10 receives the Beacon signal transmitted by the device to be charged 20, and determines the parameters of the signal transmitted by the wireless charging device 10 according to the received Beacon signal. At the same time, the power value of the Beacon signal reaching the wireless charging device 10 is obtained as the second power value P. B .

[0124] Step 03: The wireless charging device 10 calculates the first power value P A and the second power value P B The difference between L .

[0125] Step 04: The wireless charging device 10 calculates the power loss value P L To calculate the transmission power value Ptx of the charging signal;

[0126] Where Ptx=P+P L .

[0127] Step 05, the wireless charging device 10 transmits a charging signal with the transmission parameters determined in step 02. At this time, the charging signal reaching the device to be charged 20 can meet the maximum power required by SAR compliance, and the charging current is the largest and the charging speed is the fastest.

[0128] If the position of the device to be charged 20 moves to the second position, the following steps are performed, including:

[0129] Step 06: The Beacon signal received by the wireless charging device 10 changes. The wireless charging device 10 determines the parameters of the signal transmitted by the wireless charging device 10 according to the received Beacon signal. At the same time, the strength of the Beacon signal reaching the wireless charging device 10 is also obtained, which is assumed to be P B ', at this time the loss value calculated by the wireless charging device 10 is P L '.

[0130] Step 07, the wireless charging device 10 adjusts the transmission power value Ptx of the charging signal to obtain an adjusted transmission power value Ptx';

[0131] Where Ptx'=P+P L '.

[0132] Step 08, the wireless charging device 10 transmits a charging signal with the adjusted transmission power value Ptx'. At this time, the charging signal reaching the device to be charged 20 can meet the maximum power required by SAR compliance, and the charging current is the largest and the charging speed is the fastest.

[0133] When the device to be charged 20 moves again, steps 06 to 08 are repeated.

[0134] It can be seen from the above application scenarios that in the solution provided in the embodiment of the present application, the wireless charging device 10 can determine the real-time power loss value between the wireless charging device 10 and the device to be charged according to the received Beacon signal strength, and determine the adjusted transmission power of the charging signal according to the real-time power loss value, so that the charging signal reaching the device to be charged 20 can meet the maximum power of the SAR compliance requirements, and the charging current is the largest and the charging speed is the fastest.

[0135] Figure 7 Schematic diagram of the structure of the wireless charging device 10 provided in the embodiment of the present application. Figure 7 As shown, the wireless charging device 10 includes:

[0136] An adjustment module 701 is used to adjust the transmission power value of the charging signal;

[0137] The transmitting module 702 is used to transmit the charging signal according to the adjusted transmission power value, so that the power value of the charging signal received by the device to be charged meets the preset power reference value.

[0138] The wireless charging device provided in the embodiment of the present application adjusts the transmission power value of the charging signal so that the device to be charged can be charged based on the power reference value, thereby ensuring the stability of the charging current received by the device to be charged 20. In addition, since the device to be charged 20 is charged based on the power reference value, the charging time is reduced compared with the prior art that uses a power lower than the power reference value for some time periods. The embodiment of the present application provides a storage medium, in which a computer program is stored, wherein the computer program is configured to execute any of the methods described above when running.

[0139] An embodiment of the present application provides an electronic device, including a memory and a processor. The memory stores a computer program, and the processor is configured to run the computer program to execute any of the methods described above.

[0140] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

Claims

1. A wireless charging method, characterized in that: include: Adjust the transmission power value of the charging signal; Transmitting the charging signal according to the adjusted transmission power value so that the power value of the charging signal received by the device to be charged meets the preset power reference value; The adjusting the transmission power value of the charging signal includes: Acquire a power loss value of the charging signal transmitted to the device to be charged; Obtaining an adjusted transmit power value according to the power loss value and the power reference value; The step of acquiring the power loss generated by transmitting the charging signal to the device to be charged to obtain a power loss value includes: For the same radio frequency signal, respectively obtaining a first power value used by the device to be charged to send the radio frequency signal and a second power value of the received radio frequency signal; A power loss value is obtained according to the first power value and the second power value.

2. The method according to claim 1, characterized in that When the following conditions are met, the transmission power value of the charging signal is adjusted, including: Detecting that the power of the charging signal received by the device to be charged changes; It is detected that the charging antenna of the device to be charged switches from one antenna to another.

3. The method according to claim 2, characterized in that Whether the conditions are met is determined by the following methods, including: Periodically receiving a beacon signal sent by the device to be charged; If the received beacon signal is not sent by the same antenna on the device to be charged, it is detected that the charging antenna of the device to be charged is switched from one antenna to another; If the received beacon signal is sent by the same antenna on the device to be charged, the power value of the received beacon signal is recorded, and the change information of the power value of the beacon signal is obtained, and then according to the change information of the power value of the beacon signal, it is determined whether the power of the charging signal received by the device to be charged has changed.

4. The method according to claim 1, characterized in that: The radio frequency signal is a beacon signal.

5. A wireless charging device, characterized in that: include: An adjustment module, used to adjust the transmission power value of the charging signal; A transmitting module, used for transmitting the charging signal according to the adjusted transmitting power value, so that the power value of the charging signal received by the device to be charged meets the preset power reference value; The adjusting the transmission power value of the charging signal includes: Acquire a power loss value of the charging signal transmitted to the device to be charged; Obtaining an adjusted transmit power value according to the power loss value and the power reference value; The step of acquiring the power loss generated by transmitting the charging signal to the device to be charged to obtain a power loss value includes: For the same radio frequency signal, respectively obtaining a first power value used by the device to be charged to send the radio frequency signal and a second power value of the received radio frequency signal; A power loss value is obtained according to the first power value and the second power value.

6. A storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the method according to any one of claims 1 to 4 when executed.

7. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to run the computer program to perform the method according to any one of claims 1 to 4.

8. A wireless charging system, characterized in that: It comprises the wireless charging device as claimed in claim 5 and a device to be charged.

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