Wireless charging device, equipment to be charged, wireless charging system and wireless charging method

Abstract

The embodiment of the invention provides a wireless charging method, the wireless charging method is applied to a wireless charging device, and the wireless charging method comprises the following steps: when a preset condition occurs in power supply equipment, first indication information is sent to equipment to be charged, and the first indication information is used for at least indicating the preset condition. The invention further provides a wireless charging device, the to-be-charged equipment and a wireless charging system. When the power supply equipment has the preset condition, the first indication information can be timely sent to the to-be-charged equipment to indicate that the power supply equipment has the preset condition, and when the to-be-charged equipment receives the first indication information, the to-be-charged equipment can timely know that the power supply equipment has the preset condition. And the charging can be adaptively adjusted according to the preset condition, so that the safety and the reliability of the charging are improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of wireless charging, and in particular, to a wireless charging method, a device to be charged, a power supply device, and a storage medium. Background Art

[0002] Currently, due to its convenience, wireless charging technology has been gradually popularized in electronic devices such as mobile phones and tablet computers. In the current wireless charging technology, a power supply device such as an adapter mainly supplies power to a wireless charging device, and then the wireless charging device transmits wireless electric energy to electronic devices to be charged, such as mobile phones and tablet computers, to charge the electronic devices such as mobile phones and tablet computers. Among them, in the prior art, electronic devices such as mobile phones and tablet computers default the maximum output power supported by the power supply device as the default output power, and perform charging management according to this default output power. However, due to the influence of some factors, the maximum output power supported by the power supply device does not necessarily remain constant, resulting in some problems. Summary of the Invention

[0003] The present application provides a wireless charging device, a device to be charged, a wireless charging system, and a wireless charging method to solve the above problems.

[0004] In a first aspect, a wireless charging device is provided. The wireless charging device includes a wireless transmission circuit and a first communication control unit. The wireless transmission circuit is configured to transmit a wireless charging signal, and the first communication control unit is configured to communicate with a power supply device and a device to be charged. The first communication control unit is further configured to send a first indication message to the device to be charged when a preset situation occurs in the power supply device, and the first indication message is configured to at least indicate the preset situation.

[0005] In a second aspect, a device to be charged is further provided. The device to be charged includes a rechargeable battery, a wireless reception circuit, and a second communication control unit. The wireless reception circuit is configured to receive a wireless charging signal, and after converting the wireless charging signal into direct current, charge the rechargeable battery. The second communication control unit is configured to communicate with the wireless charging device. When the second communication control unit receives the first indication message sent by the wireless charging device, it controls and adjusts the output power of the wireless reception circuit, where the first indication message is at least used to indicate that a preset situation occurs in the power supply device.

[0006] In a third aspect, a wireless charging method is further provided, which is applied to a wireless charging device. The wireless charging method includes: when a preset situation occurs in a power supply device, sending a first indication message to the device to be charged, and the first indication message is configured to at least indicate the preset situation.

[0007] Fourth aspect, there is also provided a wireless charging method, which is applied to a device to be charged. The device to be charged includes a wireless receiving circuit. The wireless charging method includes: when receiving first indication information sent by a wireless charging device, controlling and adjusting the output power of the wireless receiving circuit, where the first indication information is at least used to indicate that a preset situation has occurred to a power supply device.

[0008] Fifth aspect, there is also provided a wireless charging system. The wireless charging system includes a wireless charging device and a device to be charged. The wireless charging device includes a wireless transmitting circuit and a first communication control unit. The wireless transmitting circuit is used to transmit a wireless charging signal. The first communication control unit is used to communicate with a power supply device and the device to be charged. The first communication control unit is further used to send first indication information to the device to be charged when a preset situation occurs to the power supply device, and the first indication information is at least used to indicate the preset situation. The device to be charged includes a rechargeable battery, a wireless receiving circuit, and a second communication control unit. The wireless receiving circuit is used to receive the wireless charging signal, and after converting the wireless charging signal into direct current, charge the rechargeable battery. The second communication control unit is used to communicate with the wireless charging device. When the second communication control unit receives the first indication information sent by the wireless charging device, it controls and adjusts the output power of the wireless receiving circuit, where the first indication information is at least used to indicate that a preset situation has occurred to the power supply device.

[0009] Sixth aspect, there is also provided a computer-readable storage medium. The computer-readable storage medium stores program instructions, and the program instructions are used to be called by a processor to execute steps in a wireless charging method. The wireless charging method includes: when a preset situation occurs to a power supply device, sending first indication information to a device to be charged, where the first indication information is at least used to indicate the preset situation; or includes: when receiving first indication information sent by a wireless charging device, controlling and adjusting the output power of a wireless receiving circuit in the device to be charged, where the first indication information is at least used to indicate that a preset situation has occurred to the power supply device.

[0010] For the wireless charging device, the device to be charged, the wireless charging method, and the wireless charging system of the present application, when a preset situation occurs to the power supply device, the first indication information can be sent to the device to be charged in a timely manner to indicate that the preset situation has occurred to the power supply device. When the device to be charged receives the first indication information, it can know in a timely manner that the preset situation has occurred to the power supply device, and can make an adaptive adjustment to the charging according to the preset situation. For example, the device to be charged can adjust the output power of the wireless receiving circuit, so as to adjust the charging power. Thus, it can better adapt to the state of the power supply device after the preset situation occurs, and at least improve the safety and reliability of charging. Brief Description of the Drawings

[0011] To more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments of the present application will be described below.

[0012] Figure 1 It is a block diagram of the structure of a wireless charging system in some embodiments of the present application.

[0013] Figure 2 It is a block diagram of the structure of a wireless charging device in some embodiments of the present application.

[0014] Figure 3 It is a further block diagram of the structure of a wireless charging device in some embodiments of the present application.

[0015] Figure 4 It is a block diagram of the structure of a device to be charged in some embodiments of the present application.

[0016] Figure 5 It is a further block diagram of the structure of a device to be charged in some embodiments of the present application.

[0017] Figure 6 It is a flowchart of a wireless charging method in some embodiments of the present application.

[0018] Figure 7 It is another flowchart of a wireless charging method in some embodiments of the present application.

[0019] Figure 8 It is another flowchart of a wireless charging method in some embodiments of the present application.

[0020] Figure 9 It is yet another flowchart of a wireless charging method in some embodiments of the present application.

[0021] Figure 10 It is a further schematic flowchart of a wireless charging method in some embodiments of the present application. Detailed Description of the Embodiments

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present application, unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, indirectly connected through an intermediate medium, or the communication inside two components; it can be a communication connection; it can be an electrical connection. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to specific situations. In the present application, the term "A and / or B" includes any one of the following situations: "A", "B", and "A and B". Among them, the term "A / B" generally refers to "A" or "B". In the description of the embodiments of the present invention, the terms "first", "second", etc. are not specific, but are used to distinguish objects with the same name. In the case where there is a description in the specification, the objects with the same name referred to by the terms "first", "second", etc. can be the same object.

[0024] Please refer to Figure 1 , which is a structural block diagram of a wireless charging system 100 in some embodiments of the present application.

[0025] As Figure 1 shown, the wireless charging system 100 includes a wireless charging device 1, a device to be charged 2, and a power supply device 3.

[0026] Among them, the wireless charging device 1 and the power supply device 3 can be connected by wired or wireless means. After the power supply device 3 is connected to the wireless charging device 1, it provides power supply to the wireless charging device 1, such as outputting voltage and current to the wireless charging device 1. The wireless charging device 1 is used to be coupled to the device to be charged 2 wirelessly. The wireless charging device 1 transmits electrical energy to the device to be charged 2 wirelessly to provide electrical energy for the device to be charged 2. The device to be charged 2 can convert the received electrical energy into charging electrical energy, such as charging voltage and current, to charge the rechargeable battery in the device to be charged 2.

[0027] Among them, as Figure 1As shown, the wireless charging device 1 includes a wireless transmitting circuit 11, and the device to be charged 2 includes a wireless receiving circuit 21 and a rechargeable battery 22. Among them, the wireless transmitting circuit 11 includes a transmitting coil, and the wireless receiving circuit 21 includes a receiving coil. When the transmitting coil of the wireless transmitting circuit 11 of the wireless charging device 1 is close to and at least partially aligned with the receiving coil of the wireless receiving circuit 21, the wireless charging device 1 can be coupled to the device to be charged 2. Thus, the wireless transmitting circuit 11 can wirelessly transmit electrical energy to the device to be charged 2, and the electrical energy is received by the wireless receiving circuit 21 of the device to be charged 2. The wireless receiving circuit 21 of the device to be charged 2 can convert the received electrical energy into charging electrical energy to charge the rechargeable battery 22 therein.

[0028] In some embodiments, the power supply device 3 can be connected to the wireless charging device 1 in a wired manner. The power supply device 3 can include an adapter. For example, it can be an ordinary adapter or a voltage regulating adapter (i.e., the adapter itself can adjust the magnitude of the output voltage). The power supply device 3 can receive AC electrical energy by connecting to the mains power supply, convert the AC electrical energy into DC electrical energy, and then provide the DC electrical energy to the wireless charging device 1 in a wired connection manner. In some embodiments, the power supply device 3 can also be a mobile power supply, etc.

[0029] In some embodiments, the wireless charging device 1 can be a wireless charging base or a device with energy storage function, etc. When the wireless charging device 1 is a device with energy storage function, it further includes an energy storage module (for example, a lithium battery), which can obtain electrical energy from an external power supply device 3 and store it. Thus, the energy storage module can provide electrical energy to the wireless transmitting circuit 11. Among them, the wireless charging device 1 can obtain electrical energy from an external power supply device 3 in a wired or wireless manner. The wired manner, for example, can be to obtain electrical energy by connecting to the power supply device 3 through a connection interface (such as a USB interface, etc.). The wireless manner, for example, the wireless charging device 1 can also include a wireless receiving circuit, which can obtain electrical energy from a device with wireless charging function in a wireless manner.

[0030] In some embodiments, the device to be charged 2 can be any electronic device that supports wireless charging, such as a mobile phone, a tablet computer, etc. Among them, when charging is required, the device to be charged 2 can be placed at a corresponding position on the wireless charging device 1. For example, a position that can make the transmitting coil of the wireless transmitting circuit 11 of the wireless charging device 1 at least partially aligned with the receiving coil of the wireless receiving circuit 21. Thus, the transmitting coil of the wireless transmitting circuit 11 of the wireless charging device 1 and the receiving coil of the wireless receiving circuit 21 can be coupled to transfer energy.

[0031] In some embodiments, the wireless charging device 1 can also communicate with the device to be charged 2 through wireless communication to achieve data transmission during the wireless charging process, such as information interaction and instruction transmission. In some embodiments, in the embodiments of the present application, the wireless communication methods include but are not limited to Bluetooth communication, Wireless Fidelity (WiFi) communication, short-range wireless communication based on high carrier frequencies, optical communication, ultrasonic communication, ultra-wideband communication, and mobile communication, etc. In some embodiments, the transmitting coil of the wireless transmitting circuit 11 of the wireless charging device 1 and the receiving coil of the wireless receiving circuit 21 of the device to be charged 2 can also be shared as a communication antenna, such as an NFC (Near Field Communication) function antenna, and the wireless charging device 1 and the device to be charged 2 can perform data transmission through the transmitting coil and the receiving coil.

[0032] Among them, wireless charging technology originates from wireless power transmission technology. According to different wireless charging principles, wireless charging methods are mainly divided into three types: electromagnetic induction (also known as magnetic coupling), radio wave, and electromagnetic resonance. Currently, the mainstream wireless charging standards include the Qi standard, the Power Matters Alliance (PMA) standard, and the Alliance for Wireless Power (A4WP), etc.; among them, both the Qi standard and the PMA standard use electromagnetic induction for wireless charging, and the A4WP standard uses electromagnetic resonance for wireless charging.

[0033] In the embodiments of the present application, the electromagnetic induction (magnetic coupling) type of wireless charging technology is taken as an example for illustration. That is, energy is transmitted between the wireless charging device 1 and the device to be charged 2 through a magnetic field, so as to achieve wireless charging of the rechargeable battery 22 in the device to be charged 2 in a wireless manner, making the charging more convenient.

[0034] Please refer to Figure 2 , which is a structural block diagram of the wireless charging device 1 in some embodiments of the present application. Among them, Figure 2 it mainly shows the further structure of the wireless charging device 1. For a clearer display, the power supply device 3 and the device to be charged 2 are also shown at the same time.

[0035] As Figure 2As shown, the wireless charging device 1 includes the aforementioned wireless transmitting circuit 11 and further includes a first communication control unit 12. Among them, the wireless transmitting circuit 11 is used to transmit wireless charging signals, and the first communication control unit 12 is used to communicate with the power supply device 3 and the device to be charged 2. The first communication control unit 12 is further used to send a first indication message to the device to be charged 2 when a preset situation occurs in the power supply device 3, and the first indication message is used to at least indicate the preset situation.

[0036] Therefore, in this application, when a preset situation occurs in the power supply device 3, the wireless charging device 1 can promptly send the first indication message to the device to be charged 2 to indicate that a preset situation has occurred in the power supply device 3. Thus, the device to be charged 2 can promptly know that a preset situation has occurred in the power supply device 3 and can adaptively adjust the charging according to the preset situation. For example, the device to be charged 2 can adjust its own charging power, so as to better adapt to the state of the power supply device 3 after the preset situation occurs, and at least improve the safety and reliability of charging.

[0037] In some embodiments, the first indication message is used to at least indicate the preset situation, that is, to at least indicate that a preset situation has occurred in the power supply device 3. Among them, the first indication message can at least include information about the occurrence of a preset situation in the power supply device 3 to at least indicate the preset situation.

[0038] In some embodiments, the occurrence of a preset situation in the power supply device 3 in this application may include or refer to a change in the output capacity of the power supply device 3.

[0039] In some embodiments, the preset situation includes at least one of the following: the maximum output power supported by the power supply device 3 changes; the output voltage of the power supply device 3 is lower than a preset threshold.

[0040] That is, in some embodiments, the occurrence of a preset situation in the power supply device 3 may include a change in the maximum output power supported by the power supply device 3, and / or the output voltage of the power supply device 3 is lower than a preset threshold. Among them, the maximum output power supported by the power supply device 3 is equivalent to the maximum power that the power supply device 3 can output, that is, the output capacity of the power supply device 3. When the maximum output power supported by the power supply device 3 changes, it means that the output capacity of the power supply device 3 has changed. Among them, the output voltage of the power supply device 3 also corresponds to the output capacity of the power supply device 3. When the output voltage of the power supply device 3 is lower than a preset threshold, it also means that the output capacity of the power supply device 3 has changed. For example, the output capacity of the power supply device 3 has decreased.

[0041] Generally speaking, the device to be charged 2 will, under the maximum output power supported by the power supply device 3, further determine the charging power according to the charging state of the rechargeable battery 22 at present, such as battery power, temperature, etc., and request the power supply device 3 to output the corresponding output power. The corresponding output power may be the maximum output power supported by the power supply device 3 or less than the maximum output power supported by the power supply device 3. When the maximum output power supported by the power supply device 3 changes, for example, drops, if the device to be charged 2 cannot obtain the information on the change of the output capacity of the power supply device 3 in time, that is, cannot know in time that the maximum output power supported by the power supply device 3 has dropped, it may cause the charging power to exceed the capacity of the power supply device 3, trigger the overcurrent or undervoltage protection of the power supply device 3, and cause the charging process to be unstable. Or, when the maximum output power supported by the power supply device 3 increases, if the device to be charged 2 cannot obtain the information on the change of the output capacity of the power supply device 3 in time, that is, cannot know in time that the maximum output power supported by the power supply device 3 has increased, it may still request the power supply device 3 to output a lower output power, resulting in charging at a lower charging power and a decrease in charging efficiency.

[0042] Therefore, in the present application, the preset situation includes that when the maximum output power supported by the power supply device 3 changes, when the maximum output power supported by the power supply device 3 changes, the wireless charging device 1 timely sends the first indication information to the device to be charged 2 to indicate that the power supply device 3 has a preset situation. Thus, the device to be charged 2 can know in time that the power supply device 3 has a preset situation, such as the change of the maximum output power supported by the power supply device 3, and can adaptively adjust the charging according to the preset situation. For example, the device to be charged 2 can adjust its own charging power, so as to better match the current maximum output power state supported by the power supply device 3 and improve the safety, reliability and efficiency of charging.

[0043] Generally speaking, when the power supply device 3 is affected by some factors, such as temperature rise, line damage, etc., it may cause the output voltage to be lower than the preset threshold. At this time, it also means that the output capacity of the power supply device 3 is insufficient or abnormal. At this time, if the device to be charged 2 cannot obtain the information on the change of the output capacity of the power supply device 3 in time, that is, cannot know in time that the output voltage of the power supply device 3 is lower than the preset threshold, it may cause the charging power to exceed the capacity of the power supply device 3, and may also trigger the overcurrent or undervoltage protection of the power supply device 3, resulting in an unstable charging process.

[0044] Therefore, in the present application, when the preset situation includes that the output voltage of the power supply device 3 is lower than a preset threshold, the wireless charging device 1 timely sends the first indication information to the device to be charged 2 when the output voltage of the power supply device 3 is lower than the preset threshold to indicate that a preset situation has occurred in the power supply device 3. Thus, the device to be charged 2 can timely know that a preset situation has occurred in the power supply device 3, for example, the output voltage of the power supply device 3 is lower than the preset threshold, and can adaptively adjust the charging according to this preset situation. For example, the device to be charged 2 can adjust its own charging power, so as to better match the current output voltage of the power supply device 3 and improve the safety and reliability of charging.

[0045] Among them, in some embodiments, the preset situation may also include that the output current of the power supply device 3 is lower than a preset current threshold and other situations.

[0046] In some embodiments, the preset situation may include that the maximum output power supported by the power supply device 3 changes. The first communication control unit 12 communicates with the power supply device 3 and asks the power supply device 3 about the maximum output power it currently supports to determine whether the maximum output power supported by the power supply device 3 has changed. When it is determined that the maximum output power supported by the power supply device 3 has changed, the first indication information is sent to the device to be charged 2, and the first indication information at least indicates that the maximum output power currently supported by the power supply device has changed.

[0047] That is, in some embodiments, the first communication control unit 12 communicates with the power supply device 3 and can determine whether the maximum output power supported by the power supply device 3 has changed by asking the power supply device 3 about the maximum output power it currently supports, for example, asking the power supply device 3 about the maximum output power it currently supports at intervals. When it is determined that the maximum output power supported by the power supply device 3 has changed, the first indication information is sent to the device to be charged 2, and the first indication information at least indicates that the maximum output power currently supported by the power supply device 3 has changed.

[0048] In some embodiments, the first communication control unit 12 asks the power supply device 3 about the maximum output power it currently supports at intervals, and determines that the maximum output power supported by the power supply device 3 has changed when the maximum output power indicated by the power indication information sent by the power supply device 3 is different from the maximum output power indicated by the power indication information received last time.

[0049] That is, in some embodiments, the first communication control unit 12 intermittently queries the power supply device 3 about the maximum output power currently supported by the power supply device 3, and the power supply device 3 responds to this query by sending power indication information to indicate the maximum output power currently supported by the power supply device 3. The first communication control unit 12 can then receive the power indication information sent by the power supply device 3 in response to each query, determine the maximum output power supported by the power supply device 3 based on the power indication information sent by the power supply device 3 each time, and when the currently determined maximum output power supported by the power supply device 3 is different from the previously determined maximum output power supported by the power supply device 3, it is determined that the maximum output power supported by the power supply device 3 has changed.

[0050] In some embodiments, the first communication control unit 12 intermittently queries the power supply device 3 about the maximum output power currently supported by the power supply device 3, which may be to periodically query the power supply device 3 about the maximum output power currently supported by the power supply device 3 at a preset interval time, such as 30 seconds.

[0051] In some embodiments, the first communication control unit 12 intermittently queries the power supply device 3 about the maximum output power currently supported by the power supply device 3, and the query interval time between different adjacent queries may be different. For example, in some embodiments, as the charging duration increases, the query interval time of the first communication control unit 12 may gradually decrease.

[0052] In some embodiments, the first communication control unit 12 is further configured to send second indication information to the device to be charged 2 when receiving a power query request sent by the device to be charged 2, so as to indicate the maximum output power currently supported by the power supply device 3.

[0053] That is, in some embodiments, the first indication information may only indicate that the maximum output power currently supported by the power supply device has changed. After the first communication control unit 12 sends the first indication information to the device to be charged 2 to indicate that the maximum output power supported by the power supply device 3 has changed, the device to be charged 2 may still send a power query request to the wireless charging device 1. When the first communication control unit 12 receives the power query request sent by the device to be charged 2, it may send second indication information to the device to be charged 2 to indicate the maximum output power currently supported by the power supply device 3.

[0054] In some embodiments, the second indication information includes information about the maximum output power currently supported by the power supply device 3, so as to indicate the maximum output power currently supported by the power supply device 3.

[0055] In some embodiments, when the maximum output power supported by the power supply device 3 changes, the first communication control unit 12 stops responding to the power adjustment request sent by the device to be charged 2 within a first preset duration, and after the first preset duration has elapsed, resumes responding to the power adjustment request sent by the device to be charged 2, where the power adjustment request includes a power increase request for requesting an increase in power.

[0056] Among them, the first communication control unit 12 stopping responding to the power adjustment request sent by the device to be charged 2 may mean that the first communication control unit 12 can ignore the power adjustment request sent by the device to be charged 2. The first communication control unit 12 responding to the power adjustment request sent by the device to be charged 2 may mean that the first communication control unit 12 receives the power adjustment request sent by the device to be charged 2 and performs subsequent processing, such as further negotiating with the power supply device 3 to request the power supply device 3 to increase its output power, or rejecting the power adjustment request. For example, the first communication control unit 12 can perform subsequent processing according to the change of the maximum output power supported by the power supply device 3. For example, when the maximum output power supported by the power supply device 3 decreases, the first communication control unit 12 can reject the power adjustment request and send a rejection message to the device to be charged 2. When the maximum output power supported by the power supply device 3 increases, the first communication control unit 12 can further negotiate with the power supply device 3 to request the power supply device 3 to increase the output power of the power supply device 3. Among them, the rejection message may include the reason for rejection, including that the maximum output power supported by the power supply device 3 has decreased and the power cannot be increased any further, etc.

[0057] Among them, during the charging process, the device to be charged 2 will send a power adjustment request to the wireless charging device 1 according to the maximum output power supported by the power supply device 3 and / or the current battery parameters of the rechargeable battery 22, so as to request the wireless charging device 1 to negotiate with the power supply device 3 and request the power supply device 3 to increase or decrease the output power. In some embodiments, when the maximum output power supported by the power supply device 3 changes, the maximum output power supported by the power supply device 3 may not be stable yet and may still change. Therefore, within the first preset duration after the first communication control unit 12 determines that the change has occurred, even if it receives the power adjustment request sent by the device to be charged 2, it does not respond, so as to avoid the problem that the response to the power adjustment request is not appropriate or accurate due to the instability of the maximum output power supported by the power supply device 3.

[0058] In some embodiments, the first preset duration may be a suitable time such as 15 seconds, 20 seconds, etc.

[0059] Among them, in some embodiments, the first communication control unit 12 may start a timer when the maximum output power supported by the power supply device 3 changes. The timing duration of the timer may be the first preset duration. The first communication control unit 12 may respond to the power adjustment request sent by the device to be charged 2 after the timer expires.

[0060] In some embodiments, the power adjustment request may also include a power reduction request for requesting a power reduction. The first communication control unit 12 may also stop responding to the power adjustment request, i.e., the power reduction request, sent by the device to be charged 2 within the first preset duration, and respond to the power reduction request after the first preset duration has elapsed.

[0061] In some embodiments, the power adjustment request of the device to be charged 2 may be a control error packet (CEP). Among them, when the control error packet received by the first communication control unit 12 is a positive CEP, it is determined as a power increase request. When the control error packet received by the first communication control unit 12 is a negative CEP, it is determined as a power reduction request. Among them, in some embodiments, the control error packet, that is, the CEP may include an 8-bit value. The first communication control unit 12 may further determine whether the currently received CEP is a positive CEP or a negative CEP according to the value of the CEP. For example, when the value of the CEP received by the first communication control unit 12 is below 128, that is, 0 to 127, it is determined as a positive CEP. When the value of the CEP received is greater than or equal to 128, that is, 128 to 255, it is determined as a negative CEP.

[0062] In some embodiments, the first indication information further indicates the maximum output power currently supported by the power supply device 3. That is, in some embodiments, the first indication information may not only include the information that the maximum output power currently supported by the power supply device changes, but also include the information of the maximum output power currently supported by the power supply device 3, so as to indicate that the maximum output power currently supported by the power supply device 3 has changed and the specific maximum output power currently supported.

[0063] Thus, in some embodiments, the wireless charging device 1 can indicate to the device to be charged 2 through the first indication information that the maximum output power currently supported by the power supply device 3 has changed and the specific maximum output power currently supported, without multiple command exchanges.

[0064] In some embodiments, the preset situation includes that the output voltage of the power supply device 3 is lower than a preset threshold.

[0065] Please refer toFigure 3 , which is a further structural block diagram of the wireless charging device 1 in some embodiments of the present application. Among them, Figure 3 It is mainly to schematically show a further structure of the wireless charging device 1. For a clearer display, the power supply device 3 and the device to be charged 2 are also schematically shown at the same time.

[0066] As Figure 3 shown, the wireless charging device 1 further includes a voltage detection unit 13 for detecting the output voltage of the power supply device 3. When the voltage detected by the voltage detection unit 13 is lower than a preset threshold, the first communication control unit 12 determines that the output voltage of the power supply device 3 is lower than the preset threshold and sends the first indication information to the device to be charged 2. The first indication information at least indicates that the output voltage of the power supply device 3 is lower than the preset threshold.

[0067] That is, in some embodiments, the preset situation includes that the output voltage of the power supply device 3 is lower than the preset threshold. The wireless charging device 1 further includes a voltage detection unit 13 for detecting the output voltage of the power supply device 3. The first communication control unit 12 can determine that the output voltage of the power supply device 3 is lower than the preset threshold when the voltage detected by the voltage detection unit 13 is lower than the preset threshold, and send the first indication information to the device to be charged 2 to indicate the preset situation, that is, to indicate that the output voltage of the power supply device 3 is abnormal.

[0068] In some embodiments, the first communication control unit 12 stops responding to the power adjustment request sent by the device to be charged 2 within a second preset duration, and after the second preset duration has passed, resumes responding to the power adjustment request sent by the device to be charged 2. Among them, the power adjustment request includes a power increase request for requesting an increase in power.

[0069] Among them, because when it is just determined that the output voltage of the power supply device 3 is lower than the preset threshold, since the output voltage of the power supply device 3 may not be stable yet and may still change, therefore, within the second preset duration starting from when the first communication control unit 12 determines that the output voltage is lower than the preset threshold, even if it receives the power adjustment request sent by the device to be charged 2, it does not respond. Thus, it can avoid the problem that the response to the power adjustment request is inappropriate or inaccurate due to the output voltage of the power supply device 3.

[0070] Among them, the second preset duration may be the same as or different from the first preset duration. For example, since the change of the output voltage will be relatively more stable faster, the second preset duration can also be less than the first preset duration. Among them, the second preset duration can be a suitable time such as 10 seconds, 15 seconds, etc.

[0071] Among them, in some embodiments, when the preset situation includes that the output voltage of the power supply device 3 is lower than a preset threshold, the first communication control unit 12 can start a timer when the maximum output power supported by the power supply device 3 changes. The timing duration of the timer can be the second preset duration. The first communication control unit 12 can also respond to the power adjustment request sent by the device to be charged 2 after the timer expires.

[0072] In some embodiments, the first communication control unit 12 is further configured to control and adjust the transmission power of the wireless transmission circuit 11 when a preset situation occurs in the power supply device 3.

[0073] That is, in some embodiments, the first communication control unit 12 is further configured to control and adjust the transmission power of the wireless transmission circuit 11 when the maximum output power currently supported by the power supply device changes and / or the output voltage of the power supply device 3 is lower than a preset threshold, so as to adapt to the current output capacity of the power supply device 3.

[0074] In some embodiments, when the maximum output power supported by the power supply device 3 decreases and / or the output voltage of the power supply device 3 is lower than a preset threshold, the first communication control unit 12 controls to reduce the transmission power of the wireless transmission circuit 11.

[0075] That is, in some embodiments, when the maximum output power supported by the power supply device 3 decreases and / or the output voltage of the power supply device 3 is lower than a preset threshold, although the transmission power of the wireless transmission circuit 11 will decrease as the current output capacity of the power supply device 3 decreases, however, the transmission power of the wireless transmission circuit 11 may exceed the output power that the power supply device 3 can support or provide, exceeding the capacity of the power supply device 3, and easily triggering overcurrent or undervoltage protection of the power supply device 3, resulting in charging interruption and unstable charging process. Therefore, when the maximum output power supported by the power supply device 3 decreases and / or the output voltage of the power supply device 3 is lower than a preset threshold, the first communication control unit 12 controls to reduce the transmission power of the wireless transmission circuit 11, which can effectively avoid this problem.

[0076] In some embodiments, as described above, the preset conditions may also include a change in the maximum output power currently supported by the power supply device, and the output voltage of the power supply device 3 being lower than a preset threshold. The first communication control unit 12 may first determine whether the maximum output power currently supported by the power supply device has changed. If the maximum output power currently supported by the power supply device 3 has changed, the first communication control unit 12 sends first indication information to the device to be charged 2, and the first indication information indicates that the maximum output power currently supported by the power supply device 3 has changed. If the maximum output power currently supported by the power supply device has not changed, the first communication control unit 12 then continues to determine whether the output voltage of the power supply device 3 is lower than the preset threshold. If the output voltage of the power supply device 3 is lower than the preset threshold, the first communication control unit 12 sends first indication information to the device to be charged 2, and at this time, the first indication information indicates that the output voltage of the power supply device 3 is lower than the preset threshold.

[0077] Among them, for the subsequent processing operations when the maximum output power currently supported by the power supply device 3 changes, and the subsequent processing operations when the output voltage of the power supply device 3 is lower than the preset threshold, reference may be made to the foregoing content. For example, when the maximum output power currently supported by the power supply device 3 changes, the first communication control unit 12 sends first indication information to the device to be charged 2, and the device to be charged 2 may send a power query request to the wireless charging device 1. When the first communication control unit 12 receives the power query request sent by the device to be charged 2, the first communication control unit 12 sends second indication information to the device to be charged 2 to indicate the maximum output power currently supported by the power supply device 3. The device to be charged 2 may then adjust the charging power according to the maximum output power currently supported by the power supply device 3. Among them, if the maximum output power currently supported by the power supply device has not changed, the first communication control unit 12 then continues to determine whether the output voltage of the power supply device 3 is lower than the preset threshold. If the output voltage of the power supply device 3 is lower than the preset threshold, the first communication control unit 12 sends first indication information to the device to be charged 2, and at this time, the first indication information indicates that the output voltage of the power supply device 3 is lower than the preset threshold. The first communication control unit 12 controls the reduction of the transmission power of the wireless transmission circuit 11 and stops responding to the power adjustment request sent by the device to be charged 2 within a second preset time period. After receiving the first indication information, the device to be charged 2 reduces the charging power. In addition, the first communication control unit 12 also responds to the power adjustment request sent by the device to be charged 2 after the second preset time period.

[0078] In some embodiments, such as Figure 3As shown, the wireless transmission circuit 11 may include a first voltage conversion circuit 111 and a transmission coil 112. The first voltage conversion circuit 111 is configured to convert the electrical energy provided by the power supply device 3 into alternating current with a suitable voltage and transmit it through the transmission coil 112.

[0079] Among them, in some embodiments, the power supply device 3 may be an adapter or the like. The power supply device 3 is configured to convert the commercial alternating current into direct current electrical energy and provide it to the wireless charging device 1. Among them, the first voltage conversion circuit 111 may be an inverter. For example, it may include an inverter bridge composed of a plurality of switching devices, and is configured to convert the direct current electrical energy provided by the power supply device 3 into alternating current with a suitable voltage, and then transmit it through the transmission coil 112.

[0080] Among them, the first communication control unit 12 can control and adjust the output voltage of the first voltage conversion circuit 111 by controlling and adjusting the conduction duty ratio of the switching devices in the first voltage conversion circuit 111, so as to adjust the transmission power of the wireless transmission circuit 11.

[0081] In some embodiments, as Figure 3 shown, the first communication control unit 12 may include a first communication module 121, a second communication module 122, and a first controller 123. Among them, the first communication module 121 is configured to establish a communication connection with the power supply device 3, the second communication module 122 is configured to establish a communication connection with the device to be charged 2, and the first controller 123 is configured to communicate with the power supply device 3 and the device to be charged 2 through the first communication module 121 and the second communication module 122 respectively.

[0082] In some embodiments, the functional operations performed by the foregoing first communication control unit 12 may be mainly performed by the first controller 123.

[0083] Among them, the first controller 123 may include at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, a microprocessor, etc.

[0084] In some embodiments, the wireless charging device 1 and the power supply device 3 may be connected in a wired manner. The first communication module 121 may be a wired communication module, such as Figure 3 As shown, the first communication module 121 may include a connection interface 121a. The power supply device 3 includes a connection interface 31. Among them, the connection interface 121a of the wireless charging device 1 and the connection interface 31 of the power supply device 3 may be connected through a transmission line L1. In some embodiments, the connection interface 121a and the connection interface 31 may be USB (Universal Serial Bus) interfaces, etc., and the transmission line L1 may be a USB transmission line. In some embodiments, the power supply device 3 may supply electrical energy to the wireless charging device 1 through the transmission line L1, and may also communicate with the wireless charging device 1 through the transmission line L1.

[0085] Among them, the USB interface may be a common USB interface, a micro USB interface, a Type C interface, etc. The power supply device 3 may supply electrical energy to the wireless charging device 1 through the power line in the USB interface and the transmission line L1. Among them, the power line in the USB interface and the transmission line L1 may be a VBus line and / or a ground line. The power supply device 3 may also communicate bidirectionally with the wireless charging device 1 through the data line in the USB interface and the transmission line L1. This data line may be a D+ line and / or a D- line in the USB interface and the transmission line L. The so-called bidirectional communication may refer to the interaction of information and the exchange of instructions between the power supply device and the wireless charging device, etc.

[0086] In some embodiments, the wireless charging device 1 and the device to be charged 2 may be connected wirelessly. The second communication module 122 may be a wireless communication module, such as a Bluetooth communication module, a Wireless Fidelity (WiFi) communication module, a short-range wireless communication based on a high carrier frequency, an optical communication, an ultrasonic communication, an ultra-wideband communication, and a mobile communication module.

[0087] In some embodiments, the second communication module 122 may support NFC (Near Field Communication) function. The second communication module 122 may further include the transmitting coil 112, and the transmitting coil 112 may be shared as a communication antenna, such as an NFC antenna. Thus, the wireless charging device 1 can provide electrical energy to the device to be charged 2 through the transmitting coil 112 and can also communicate with the device to be charged 2 through the transmitting coil 112. Therefore, by sharing the transmitting coil 112 as a communication antenna, there is no need to set up an additional communication antenna, which can effectively save costs and reduce the occupation of space.

[0088] Wherein, the wireless charging device 1 may further include other components, such as a memory, etc., which will not be elaborated here.

[0089] Wherein, Figure 2 and Figure 3 may also be regarded as a further structural schematic diagram of the wireless charging system 100.

[0090] Please refer to Figure 4 , which is a structural block diagram of the device to be charged 2 in some embodiments of the present application. Wherein, Figure 4 it is mainly to schematically show the further structure of the device to be charged 2. For a clearer display, the wireless charging device 1 is also schematically shown.

[0091] In some embodiments, as Figure 4 shown, the device to be charged 2 includes a wireless receiving circuit 21, a rechargeable battery 22, and a second communication control unit 23. Wherein, the wireless receiving circuit 21 is used to receive the wireless charging signal transmitted by the wireless charging device 1, and after converting the wireless charging signal into direct current, charge the rechargeable battery 22. The second communication control unit 23 is used to communicate with the wireless charging device 1. For example, it communicates with the first communication control unit 12 of the wireless charging device 1. When the second communication control unit 23 receives the first indication information sent by the wireless charging device 1, it controls and adjusts the output power of the wireless receiving circuit 21, wherein the first indication information is at least used to indicate that a preset situation occurs in the power supply device 3.

[0092] The direct current converted from the wireless charging signal by the wireless receiving circuit 21 may include ordinary direct current or pulsed direct current, etc.

[0093] Among them, the output power of the wireless receiving circuit 21 can be the charging power provided to the rechargeable battery 22 for charging, or be related to the charging power. Thus, when a preset situation occurs in the power supply device 3, the wireless charging device 1 can timely send the first indication information to the device to be charged 2 to indicate that a preset situation has occurred in the power supply device 3. When the device to be charged 2 receives the first indication information, it can timely know that a preset situation has occurred in the power supply device 3, and can adaptively adjust the charging according to this preset situation. For example, the device to be charged 2 can adjust the output power of the wireless receiving circuit 21, thereby adjusting the charging power. Thus, it can better adapt to the state of the power supply device 3 after the preset situation occurs, and at least improve the safety and reliability of charging.

[0094] In some embodiments, as described above, the preset situation includes at least one of the following: the maximum output power supported by the power supply device changes; the output voltage of the power supply device is lower than a preset threshold.

[0095] In some embodiments, when the preset situation includes that the maximum output power supported by the power supply device 3 changes, the second communication control unit 23 also sends a power inquiry request to the wireless charging device 1 after receiving the first indication information, to inquire about the maximum output power currently supported by the power supply device 3. The second communication control unit 23 obtains the maximum output power currently supported by the power supply device 3 when receiving the second indication information sent by the wireless charging device 1 that indicates the maximum output power currently supported by the power supply device 3.

[0096] That is, in some embodiments, the first indication information can only indicate that a preset situation has occurred in the power supply device 3. For example, it only indicates that the maximum output power supported has changed. Thus, after receiving the first indication information, the second communication control unit 23 of the device to be charged 2 can also send a power inquiry request to the wireless charging device 1. When the first communication control unit 12 receives the power inquiry request sent by the device to be charged 2, it can send the second indication information to the device to be charged 2 to indicate the maximum output power currently supported by the power supply device 3. The second communication control unit 23 can obtain the maximum output power currently supported by the power supply device 3 after receiving the second indication information.

[0097] In some embodiments, when the preset situation includes that the maximum output power supported by the power supply device 3 changes, the first indication information also indicates the maximum output power currently supported by the power supply device 3. The second communication control unit 23 obtains the maximum output power currently supported by the power supply device 3 according to the maximum output power indicated by the first indication information.

[0098] That is, in some embodiments, the first indication information may include not only the information indicating that the maximum output power currently supported by the power supply device has changed, but also the information of the maximum output power currently supported by the power supply device 3, so as to indicate that the maximum output power currently supported by the power supply device 3 has changed and the specific maximum output power currently supported. Thus, in some embodiments, after receiving the first indication information, the second communication control unit 23 can know that the maximum output power currently supported by the power supply device 3 has changed and the specific maximum output power currently supported, without having to send a power query request to the wireless charging device 1 again, which can save instruction exchanges.

[0099] In some embodiments, the second communication control unit 23 controls and adjusts the output power of the wireless receiving circuit 21 at least according to the maximum output power currently supported by the power supply device 3.

[0100] That is, the output power of the wireless receiving circuit 21 generally cannot be higher than the maximum output power currently supported by the power supply device 3. Therefore, the second communication control unit 23 uses the maximum output power currently supported by the power supply device 3 as the upper limit of the output power of the wireless receiving circuit 21, and controls and adjusts the output power of the wireless receiving circuit 21 below the maximum output power currently supported by the power supply device 3, thereby improving the reliability of charging.

[0101] In some embodiments, the second communication control unit 23 is further configured to obtain the battery parameters of the rechargeable battery 22, and control and adjust the output power of the wireless receiving circuit 21 according to the maximum output power currently supported by the power supply device 3 and the battery parameters of the rechargeable battery 22.

[0102] As described above, the output power of the wireless receiving circuit 21 may be the charging power provided to the rechargeable battery 22 for charging, or related to the charging power. Thus, in some embodiments, the second communication control unit 23 may use the maximum output power currently supported by the power supply device 3 as the upper limit according to the maximum output power currently supported by the power supply device 3, and then control and adjust the output power of the wireless receiving circuit 21 according to the battery parameters of the rechargeable battery 22, so that the charging power provided to the rechargeable battery 22 is adapted to the battery parameters of the rechargeable battery 22.

[0103] Among them, the battery parameters may include battery power, battery voltage, and so on.

[0104] Among them, the rechargeable battery 22 may include a single cell or multiple cells. When the rechargeable battery 22 includes multiple cells, the multiple cells are in a series relationship. Among them, when the rechargeable battery 22 includes multiple cells, the battery parameters may include the total power, total voltage of the multiple cells, and / or the power and voltage of a single cell among them, and so on.

[0105] In some embodiments, the preset situation includes that the output voltage of the power supply device 3 is lower than a preset threshold value. The first indication information indicates that the output voltage of the power supply device 3 is lower than the preset threshold value. When the second communication control unit 23 receives the first indication information, it controls to reduce the output power of the wireless receiving circuit 21.

[0106] Among them, when the power supply device 3 is affected by some factors, such as temperature rise, line damage and other problems, it may cause the output voltage to be lower than the preset threshold value. At this time, it also indicates that the output capacity of the power supply device 3 is insufficient or abnormal. When the second communication control unit 23 receives the first indication information indicating that the output voltage of the power supply device 3 is lower than the preset threshold value, it controls to reduce the output power of the wireless receiving circuit 21, so as to ensure within the output capacity range of the power supply device 3 and avoid triggering overcurrent or undervoltage protection of the power supply device 3.

[0107] Among them, in the present application, the preset threshold value may be a value of a preset ratio of the rated output voltage of the power supply device 3. For example, it may be a value such as 70%, 80% of the rated output voltage of the power supply device 3, that is, the preset ratio may be 70%, 80%, etc.

[0108] In some embodiments, the second communication control unit 23 may also send a power adjustment request to the wireless charging device 1, so as to request the wireless charging device 1 to negotiate with the power supply device 3, and request the power supply device 3 to increase or decrease the output power of the power supply device 3 to match the current charging demand.

[0109] That is, in some embodiments, since the output power of the wireless receiving circuit 21 of the device to be charged 2 cannot exceed the actual output power of the power supply device 3, the second communication control unit 23 may also send a power adjustment request to the wireless charging device 1, so as to request the wireless charging device 1 to negotiate with the power supply device 3, and request the power supply device 3 to increase or decrease the output power of the power supply device 3 to match the current charging demand.

[0110] In some embodiments, the second communication control unit 23 may send a power adjustment request to the wireless charging device 1 according to the maximum output power supported by the power supply device 3, so as to request the wireless charging device 1 to negotiate with the power supply device 3, and request the power supply device 3 to increase or decrease the output power. Thus, the output power of the power supply device 3 can be adjusted within the supported output capacity range and match the current charging demand.

[0111] In some embodiments, the second communication control unit 23 may also send a power adjustment request to the wireless charging device 1 according to the maximum output power number supported by the power supply device 3 and the battery parameters of the rechargeable battery 22. Among them, the battery parameters may be the battery power, battery voltage, etc. of the rechargeable battery 22. Thus, the output power of the power supply device 3 can be adjusted within the supported output capacity range and can better match the charging demand of the rechargeable battery 22.

[0112] Among them, as described above, the power adjustment request may be a control error packet (CEP), and when the control error packet is a positive CEP, it corresponds to a power increase request, and when the control error packet is a negative CEP, it corresponds to a power decrease request. Among them, in some embodiments, the control error packet, that is, the CEP, may include an 8-bit value. When the value of the CEP is below 128, that is, 0 to 127, it corresponds to a positive CEP. When the value of the CEP is greater than or equal to 128, that is, 128 to 255, it corresponds to a negative CEP.

[0113] Among them, Figure 4 The wireless charging device 1 shown in Figure 2 is schematically illustrated by taking the structure of the wireless charging device 1 shown in

[0114] as an example. Obviously, the structure of the wireless charging device 1 can be the structure shown in any of the foregoing embodiments. Figure 4 It can also be regarded as a further structural schematic diagram of the wireless charging system 100.

[0115] Please refer to Figure 5 , which is a further structural block diagram of the device to be charged 2 in some embodiments of the present application. Among them, Figure 5 It is mainly to schematically show a further structure of the device to be charged 2. For a clearer display, the wireless charging device 1 and the power supply device 3 are also schematically shown.

[0116] Among them, in some embodiments, as Figure 5 shown, the wireless receiving circuit 21 may include a second voltage conversion circuit 211 and a receiving coil 212.

[0117] Among them, the receiving coil 212 is used to couple with the transmitting coil 112 of the wireless charging device 1 and receive the wireless charging signal transmitted by the transmitting coil 112 of the wireless charging device 1. The second voltage conversion circuit 211 is used to convert the wireless charging signal received by the receiving coil 212 into direct current with a suitable voltage and directly or indirectly provide it to the rechargeable battery 22 to charge the rechargeable battery 22.

[0118] Among them, in some embodiments, the output end of the second voltage conversion circuit 211 can be directly connected to the rechargeable battery 22, and the output electrical energy of the second voltage conversion circuit 211, such as output power, or output voltage, output current, etc., can be directly provided to the rechargeable battery 22 to charge the rechargeable battery 22. For example, the second communication control unit 23 can control and adjust the output electrical energy / output power of the second voltage conversion circuit 211 according to the battery parameters of the rechargeable battery 22, such as battery power, battery voltage, etc., to adapt to the current charging requirements of the rechargeable battery 22. At this time, the output power of the wireless receiving circuit 21 can be the charging power provided to the rechargeable battery 22 for charging.

[0119] In some embodiments, the device to be charged 2 may further include a charging management unit connected between the second voltage conversion circuit 211 and the rechargeable battery 22. The charging management unit is used to convert the output electrical energy of the second voltage conversion circuit 211 into charging electrical energy for charging the rechargeable battery 22, such as charging power, charging voltage, charging current, etc. Among them, the charging management unit may include a boost circuit and / or a buck circuit, and boost or reduce the power, etc. at a certain ratio. At this time, the output power of the wireless receiving circuit 21 is related to the charging power.

[0120] In some embodiments, the second voltage conversion circuit 211 may include a rectifier. For example, it may be a rectifier bridge circuit composed of multiple switching devices.

[0121] Among them, the second communication control unit 23 can control and adjust the output voltage of the second voltage conversion circuit 211 by controlling and adjusting the conduction duty ratio of the switching devices in the second voltage conversion circuit 211, so as to adjust the receiving power of the wireless receiving circuit 21.

[0122] In some embodiments, the second communication control unit 23 may include a third communication module 231 and a second controller 232.

[0123] Among them, the third communication module 231 is used to establish a communication connection with the wireless charging device 1, that is, to establish a communication connection with the second communication module 122 of the wireless charging device 1.

[0124] In some embodiments, the wireless charging device 1 and the device to be charged 2 may be connected wirelessly. The third communication module 231 may also be a wireless communication module, such as a Bluetooth communication module, a Wireless Fidelity (WiFi) communication module, a short-range wireless communication based on a high carrier frequency, an optical communication module, an ultrasonic communication module, an ultra-wideband communication module, and a mobile communication module.

[0125] In some embodiments, the second communication module 122 may support NFC (Near Field Communication) function. The second communication module 122 may further include the transmitting coil 112, and the transmitting coil 112 may be shared as a communication antenna, such as an NFC antenna. The third communication module 231 may also support NFC function. The third communication module 231 may further include the receiving coil 212, and the receiving coil 212 may also be shared as a communication antenna, such as an NFC antenna. Thus, the wireless charging device 1 can be coupled to the receiving coil 212 of the device to be charged 2 through the transmitting coil 112, and can provide electrical energy to the device to be charged 2 through the transmitting coil 112 and the receiving coil 212, and can also communicate with the device to be charged 2 through the transmitting coil 112 and the receiving coil 212.

[0126] In some embodiments, the functional operations performed by the foregoing second communication control unit 23 may be mainly performed by the second controller 232.

[0127] Among them, the second controller 232 may also include at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor.

[0128] Among them, Figure 5The wireless charging device 1 shown in Figure 2 also takes the structure of the wireless charging device 1 shown in as an example for illustration. Obviously, the structure of the wireless charging device 1 can be the structure shown in any of the foregoing embodiments.

[0129] Among them, Figure 5 It can also be regarded as a further structural schematic diagram of the wireless charging system 100.

[0130] Among them, the device to be charged 2 may further include other devices, such as a memory, etc., which will not be elaborated here.

[0131] Among them, there is the foregoing interaction relationship between the wireless charging device 1 and the device to be charged 2. The functional operations performed by each of them have been introduced respectively with the wireless charging device 1 and the device to be charged 2 as the main body, and the relevant contents of the two can be referred to each other.

[0132] Please refer to Figure 6 , which is a flowchart of the wireless charging method in some embodiments of the present application. In some embodiments, the wireless charging method can be applied to the foregoing wireless charging device 1. Among them, the wireless charging method may include:

[0133] 61: When a preset situation occurs in the power supply device, send a first indication message to the device to be charged, and the first indication message is used to at least indicate the preset situation.

[0134] Thus, when a preset situation occurs in the power supply device, the first indication message can be sent to the device to be charged in time to indicate that the preset situation has occurred in the power supply device. Thus, the device to be charged can know in time that the preset situation has occurred in the power supply device, and can adaptively adjust the charging according to the preset situation. For example, the device to be charged can adjust its own charging power, so as to better adapt to the state of the power supply device after the preset situation occurs, and at least improve the safety and reliability of charging.

[0135] In some embodiments, the preset situation includes at least one of the following: the maximum output power supported by the power supply device changes; the output voltage of the power supply device is lower than a preset threshold.

[0136] In some embodiments, the preset situation includes that the maximum output power supported by the power supply device changes, and the wireless charging method further includes: querying the maximum output power currently supported by the power supply device to determine whether the maximum output power supported by the power supply device changes.

[0137] In some embodiments, querying the maximum output power currently supported by the power device to determine whether the maximum output power supported by the power device changes includes: intermittently querying the maximum output power currently supported by the power device, and when the maximum output power indicated by the power indication information sent by the power device is different from the maximum output power indicated by the power indication information received last time, determining that the maximum output power supported by the power device has changed.

[0138] In some embodiments, the wireless charging method further includes: when receiving a power query request sent by the device to be charged, sending second indication information to the device to be charged to indicate the maximum output power currently supported by the power device.

[0139] In some embodiments, the wireless charging method further includes: stopping responding to the power adjustment request sent by the device to be charged within a first preset time; and after the first preset time has elapsed, resuming to respond to the power adjustment request sent by the device to be charged, where the power adjustment request includes a power increase request for requesting an increase in power.

[0140] In some embodiments, the first indication information further indicates the maximum output power currently supported by the power device.

[0141] In some embodiments, the preset situation includes that the output voltage of the power device is lower than a preset threshold, and the wireless charging method further includes: detecting the output voltage of the power device through a voltage detection unit; and when the voltage detected by the voltage detection unit is lower than the preset threshold, determining that the output voltage of the power device is lower than the preset threshold.

[0142] In some embodiments, the wireless charging method further includes: stopping responding to the power adjustment request sent by the device to be charged within a second preset time; and after the second preset time has elapsed, resuming to respond to the power adjustment request sent by the device to be charged, where the power adjustment request includes a power increase request for requesting an increase in power.

[0143] In some embodiments, the wireless charging method further includes: when a preset situation occurs in the power device, controlling and adjusting the transmission power of the wireless transmission circuit of the wireless charging device.

[0144] In some embodiments, the controlling and adjusting the transmission power of the wireless transmission circuit of the wireless charging device when a preset situation occurs in the power device includes: when the maximum output power supported by the power device decreases and / or the output voltage of the power device is lower than a preset threshold, controlling to decrease the transmission power of the wireless transmission circuit.

[0145] WhereinFigure 6 The wireless charging method shown and the above - mentioned related steps included in the wireless charging method are applied to the wireless charging device 1, and the steps included in the wireless charging method correspond to the functional operations executed by the wireless charging device 1. For more specific content or more steps of these steps, reference can be made to the functional operations executed by the aforementioned wireless charging device 1, which will not be elaborated here.

[0146] Please refer to Figure 7 , which is another flowchart of the wireless charging method in some embodiments of the present application. In some embodiments, Figure 7 The wireless charging method shown can also be applied to the aforementioned wireless charging device 1. Among them, the wireless charging method may include:

[0147] 71: When a preset situation occurs in the power supply device, send a first indication message to the device to be charged, and the first indication message is used to at least indicate the preset situation.

[0148] 73: Control and adjust the transmission power of the wireless transmission circuit of the wireless charging device.

[0149] Among them, step 71 corresponds to Figure 6 step 61 of Figure 6 . For more specific content, reference can be made to the relevant content of the aforementioned

[0150] Please refer to Figure 8 , which is another flowchart of the wireless charging method in some embodiments of the present application. In some embodiments, Figure 8 The wireless charging method shown can also be applied to the aforementioned wireless charging device 1. Among them, the wireless charging method may include:

[0151] 81: Query the maximum output power currently supported by the power supply device to determine whether the maximum output power supported by the power supply device has changed.

[0152] 83: When a preset situation occurs in the power supply device, send a first indication message to the device to be charged, and the first indication message is used to at least indicate the preset situation.

[0153] 85: Control and adjust the transmission power of the wireless transmission circuit of the wireless charging device.

[0154] Among them, step 83 corresponds to Figure 6 step 61 of Figure 6 . For more specific content, reference can be made to the relevant content of the aforementioned

[0155] Among them, Figure 7 and Figure 8The wireless charging method shown and the above related steps included in the wireless charging method are also applied to the wireless charging device 1, and the steps included in the wireless charging method correspond to the functional operations performed by the wireless charging device 1. For more specific content or more steps of these steps, reference can be made to the functional operations performed by the aforementioned wireless charging device 1, which will not be elaborated here.

[0156] Please refer to Figure 9 , which is another flowchart of the wireless charging method in some embodiments of the present application. In some embodiments, the wireless charging method can be applied to the aforementioned device to be charged 2. Among them, the wireless charging method may include:

[0157] 91: When receiving the first indication information sent by the wireless charging device, control and adjust the output power of the wireless receiving circuit, where the first indication information is at least used to indicate that a preset situation occurs in the power supply device.

[0158] Thus, when the device to be charged receives the first indication information, it can promptly know that a preset situation has occurred in the power supply device, and can adaptively adjust the charging according to this preset situation. For example, the device to be charged 2 can adjust the output power of the wireless receiving circuit to adjust the charging power, so as to better adapt to the state after the preset situation occurs in the power supply device, and at least improve the safety and reliability of charging.

[0159] In some embodiments, the preset situation includes at least one of the following: the maximum output power supported by the power supply device changes; the output voltage of the power supply device is lower than a preset threshold.

[0160] In some embodiments, the preset situation includes that the maximum output power supported by the power supply device changes. After receiving the first indication information, the wireless charging method further includes: sending a power query request to the wireless charging device to query the maximum output power currently supported by the power supply device; and when receiving the second indication information sent by the wireless charging device indicating the maximum output power currently supported by the power supply device, obtaining the maximum output power currently supported by the power supply device.

[0161] In some embodiments, the preset situation includes that the maximum output power supported by the power supply device changes, and the first indication information also indicates the maximum output power currently supported by the power supply device. The wireless charging method further includes: obtaining the maximum output power currently supported by the power supply device according to the maximum output power indicated by the first indication information.

[0162] In some embodiments, the wireless charging method further includes: controlling and adjusting the output power of the wireless receiving circuit at least according to the maximum output power currently supported by the power supply device.

[0163] In some embodiments, the wireless charging method further includes: obtaining battery parameters of the rechargeable battery of the device to be charged. In some embodiments, the controlling and adjusting the output power of the wireless receiving circuit at least according to the maximum output power currently supported by the power supply device includes: controlling and adjusting the output power of the wireless receiving circuit according to the maximum output power currently supported by the power supply device and the battery parameters of the rechargeable battery.

[0164] In some embodiments, the preset situation includes that the output voltage of the power supply device is lower than a preset threshold, and the first indication information indicates that the output voltage of the power supply device is lower than the preset threshold. When receiving the first indication information sent by the wireless charging device, the controlling and adjusting the output power of the wireless receiving circuit includes: when receiving the first indication information, controlling to reduce the output power of the wireless receiving circuit.

[0165] In some embodiments, the wireless charging method further includes: sending a power adjustment request to the wireless charging device to request the wireless charging device to negotiate with the power supply device, and requesting the power supply device to increase or decrease the output power of the power supply device to match the current charging requirement.

[0166] In some embodiments, the sending a power adjustment request to the wireless charging device includes: sending a power adjustment request to the wireless charging device at least according to the maximum output power supported by the power supply device to request the wireless charging device to negotiate with the power supply device, and requesting the power supply device to increase or decrease the output power. Thus, the output power of the power supply device can be adjusted within the supported output capacity range and match the current charging requirement.

[0167] In some embodiments, the sending a power adjustment request to the wireless charging device at least according to the maximum output power supported by the power supply device may further include: sending a power adjustment request to the wireless charging device according to the maximum output power number supported by the power supply device and the battery parameters of the rechargeable battery, where the battery parameters may be the battery power, battery voltage, etc. of the rechargeable battery.

[0168] Wherein, Figure 9The steps of the wireless charging method shown and the above-related steps included in the wireless charging method are applied to the aforementioned device 2 to be charged, and the steps included in the wireless charging method correspond to the functional operations performed by the wireless charging device 1. For more specific content or more steps of these steps, reference can be made to the functional operations performed by the aforementioned device 2 to be charged, which will not be elaborated here.

[0169] Please refer to Figure 10 , which is a further flowchart of the wireless charging method in some embodiments of the present application. Among them, the wireless charging method can be applied to the aforementioned wireless charging system 100 including the wireless charging device 1 and the device 2 to be charged. In some embodiments, as Figure 10 shown, the wireless charging method may include:

[0170] 101: The wireless charging device determines whether the maximum output power currently supported by the power device has changed. If so, step 102 is executed; if not, step 105 is executed.

[0171] 102: The wireless charging device sends first indication information to the device to be charged, and the first indication information indicates that the maximum output power currently supported by the power device has changed.

[0172] 103: The device to be charged sends a power query request to the wireless charging device to query the maximum output power currently supported by the power device.

[0173] 104: The device to be charged adjusts the charging power provided to the rechargeable battery according to the maximum output power currently supported by the power device.

[0174] 105: Determine whether the output voltage of the power device is lower than a preset threshold. If so, step 106 is executed; if not, return to execute step 101.

[0175] 106: Reduce the transmission power of the wireless transmission circuit of the wireless charging device.

[0176] 107: Send first indication information to the device to be charged. At this time, the first indication information indicates that the output voltage of the power device is lower than the preset threshold.

[0177] 108: After receiving the first indication information, the device to be charged controls to reduce the charging power.

[0178] Among them, in some embodiments, when the execution result of step 101 and / or step 105 is "yes", after step 101 and / or step 105, the following steps may further be included: within a preset duration, the wireless charging device stops responding to the power adjustment request sent by the device to be charged, and after the preset duration elapses, responds to the power adjustment request sent by the device to be charged. Wherein, the preset duration may include the aforementioned first preset duration and / or second preset duration.

[0179] Among them, the order of the steps of the wireless charging method in this application does not represent the execution order. In some cases, the positions of these steps can be adjusted or executed in parallel. For example, the execution steps of step 106 and step 107 above can be executed in parallel or sequentially. For example, step 106 is executed before step 107, or step 107 is executed before step 106.

[0180] Among them, Figure 10 The steps of the wireless charging method shown and the above-related steps included in the wireless charging method are applied to the wireless charging system 100 of the aforementioned wireless charging device 1 and the device to be charged 2, and the steps included in the wireless charging method correspond to the functional operations performed by the wireless charging device 1 and the device to be charged 2. For more specific content or more steps of these steps, reference can be made to the functional operations performed by the aforementioned wireless charging device 1 and the device to be charged 2, which will not be elaborated here.

[0181] The embodiments of this application further provide a computer-readable storage medium. Among them, this computer-readable storage medium stores program instructions, and these program instructions cause the processor to execute some or all of the steps of the wireless charging method described in any of the above embodiments. Wherein, the processor may include the first communication control unit 12 in the aforementioned wireless charging device 1 and / or the second communication control unit 23 in the device to be charged 2.

[0182] Among them, the computer-readable storage medium may include various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs.

[0183] For example, the program instructions cause the processor to execute the following steps: when a preset situation occurs in the power supply device, send first indication information to the device to be charged, and the first indication information is used to at least indicate the preset situation.

[0184] For another example, the program instructions cause the processor to perform the following steps: when receiving first indication information sent by a wireless charging device, control and adjust the output power of the wireless receiving circuit, where the first indication information is at least used to indicate that a preset situation has occurred in a power supply device.

[0185] Wherein, the method steps executed by the computer under the program instructions are the same as the steps in the wireless charging method shown in any of the foregoing embodiments, and are also the same as the functional operations executed by the first communication control unit 12 in the foregoing wireless charging device 1 and / or the second communication control unit 23 in the device to be charged 2. For more specific content, reference may be made to the relevant descriptions of the wireless charging method, the wireless charging device 1 and / or the device to be charged 2 shown in any of the foregoing embodiments, which will not be elaborated herein.

[0186] Wherein, the present application further provides a wireless charging system, which at least includes the wireless charging device 1 in any of the foregoing embodiments and the device to be charged 2 in any of the foregoing embodiments. The wireless charging system may be the foregoing wireless charging system 100, and the wireless charging system may further include the foregoing power supply device 3.

[0187] In the wireless charging device 1, the device to be charged 2, the wireless charging method and the wireless charging system 100 of the present application, when a preset situation occurs in the power supply device 3, the first indication information can be timely sent to the device to be charged 2 to indicate that the preset situation has occurred in the power supply device 3. When the device to be charged 2 receives the first indication information, it can timely know that the preset situation has occurred in the power supply device 3, and can adaptively adjust the charging according to the preset situation. For example, the device to be charged 2 can adjust the output power of the wireless receiving circuit 21, so as to adjust the charging power. Thus, it can better adapt to the state after the preset situation occurs in the power supply device 3, and at least improve the safety and reliability of charging.

[0188] The foregoing embodiments mainly introduce the solutions of the embodiments of the present application from the perspective of the execution process of the method side in combination with the hardware framework. It can be understood that in order for an electronic device to implement the above functions, it includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to implement the described function for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0189] Regarding the various devices and products described in the above embodiments, including modules / units, they can be software modules / units, hardware modules / units, or partly software modules / units and partly hardware modules / units. For example, for the various devices and products of an application or an integrated chip, the various modules / units included therein can all be implemented in the form of hardware such as circuits, or at least some of the modules / units can be implemented in the form of software programs, which run on the integrated controller inside the chip, and the remaining part of the modules / units can be implemented in the form of hardware such as circuits; for the various devices and products corresponding to or integrated with a chip module, the various modules / units included therein can all be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component (such as a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules / units can be implemented in the form of software programs, which run on the integrated controller inside the chip module, and the remaining part of the modules / units can be implemented in the form of hardware such as circuits; for the various devices and products corresponding to or integrated with a terminal, the modules / units included therein can all be implemented in the form of hardware such as circuits, and different modules / units can be located in the same component (such as a chip, a circuit module, etc.) or different components inside the terminal, or at least some of the modules / units can be implemented in the form of software programs, which run on the integrated controller inside the terminal, and the remaining part of the modules / units can be implemented in the form of hardware such as circuits.

[0190] Embodiments of the present application can divide functional units of an electronic device according to method examples. For example, corresponding to each function, each functional unit can be divided, or two or more functions can be integrated into one processing unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0191] Embodiments of the present application also provide a computer program product. The above computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the above computer program is operable to cause a computer to execute some or all of the steps of any method recorded in the above method embodiments. The computer program product can be a software installation package, and the above computer includes an electronic device.

[0192] The above description is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application; without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wireless charging device, characterized in that: include: A wireless transmitting circuit, used for transmitting a wireless charging signal; The first communication control unit is used to communicate with the power supply device and the device to be charged. The first communication control unit is also used to send first indication information to the device to be charged when a preset situation occurs in the power supply device. The first indication information is used to at least indicate the preset situation.

2. The wireless charging device according to claim 1, characterized in that: The preset conditions include at least one of the following: The maximum output power supported by the power supply device changes; The output voltage of the power supply device is lower than a preset threshold.

3. The wireless charging device according to claim 2, characterized in that: The preset situation includes a change in the maximum output power supported by the power supply device, the first communication control unit communicates with the power supply device and inquires about the maximum output power currently supported by the power supply device to determine whether the maximum output power supported by the power supply device has changed, and when it is determined that the maximum output power supported by the power supply device has changed, the first indication information is sent to the device to be charged, and the first indication information at least indicates that the maximum output power currently supported by the power supply device has changed.

4. The wireless charging device according to claim 3, characterized in that: The first communication control unit intermittently inquires about the maximum output power currently supported by the power supply device, and determines that the maximum output power supported by the power supply device has changed when the maximum output power indicated by the power indication information sent by the power supply device is different from the maximum output power indicated by the power indication information received last time.

5. The wireless charging device according to claim 3, characterized in that: The first communication control unit is further configured to send second indication information to the device to be charged when receiving a power inquiry request sent by the device to be charged, so as to indicate the maximum output power currently supported by the power supply device.

6. The wireless charging device according to claim 3, characterized in that: The first communication control unit is used to stop responding to the power adjustment request sent by the device to be charged within a first preset time period, and resume responding to the power adjustment request sent by the device to be charged after the first preset time period has passed, wherein the power adjustment request includes a power increase request for requesting an increase in power.

7. The wireless charging device according to claim 3, characterized in that: The first indication information also indicates the maximum output power currently supported by the power supply device.

8. The wireless charging device according to claim 1, characterized in that: The preset situation includes that the output voltage of the power supply device is lower than a preset threshold value. The wireless charging device also includes a voltage detection unit for detecting the output voltage of the power supply device. When the voltage detected by the voltage detection unit is lower than the preset threshold value, the first communication control unit determines that the output voltage of the power supply device is lower than the preset threshold value, and sends the first indication information to the device to be charged. The first indication information at least indicates that the output voltage of the power supply device is lower than the preset threshold value.

9. The wireless charging device according to claim 8, characterized in that: The first communication control unit stops responding to the power adjustment request sent by the device to be charged within a second preset time period, and resumes responding to the power adjustment request sent by the device to be charged after the second preset time period, wherein the power adjustment request includes a power increase request for requesting an increase in power.

10. The wireless charging device according to any one of claims 2 to 9, characterized in that: The first communication control unit is further used to control and adjust the transmission power of the wireless transmission circuit when a preset situation occurs in the power supply device.

11. The wireless charging device according to claim 10, characterized in that: The first communication control unit controls to reduce the transmission power of the wireless transmission circuit when the maximum output power supported by the power supply device is reduced and / or the output voltage of the power supply device is lower than a preset threshold.

12. A device to be charged, characterized in that: include: Rechargeable batteries; A wireless receiving circuit, used for receiving a wireless charging signal and converting the wireless charging signal into direct current to charge the rechargeable battery; The second communication control unit is used to communicate with the wireless charging device. When the second communication control unit receives the first indication information sent by the wireless charging device, it controls and adjusts the output power of the wireless receiving circuit, wherein the first indication information is at least used to indicate that a preset situation occurs in the power supply device.

13. The device to be charged according to claim 12, characterized in that: The preset conditions include at least one of the following: The maximum output power supported by the power supply device changes; The output voltage of the power supply device is lower than a preset threshold.

14. The device to be charged according to claim 13, characterized in that: The preset situation includes a change in the maximum output power supported by the power supply device. After receiving the first indication information, the second communication control unit sends a power inquiry request to the wireless charging device to inquire about the maximum output power currently supported by the power supply device. When the second communication control unit receives the second indication information sent by the wireless charging device indicating the maximum output power currently supported by the power supply device, the second communication control unit obtains the maximum output power currently supported by the power supply device.

15. The device to be charged according to claim 13, characterized in that: The preset situation includes a change in the maximum output power supported by the power supply device, the first indication information also indicates the maximum output power currently supported by the power supply device, and the second communication control unit obtains the maximum output power currently supported by the power supply device according to the maximum output power indicated by the first indication information.

16. The device to be charged according to claim 14 or 15, characterized in that: The second communication control unit controls and adjusts the output power of the wireless receiving circuit at least according to the maximum output power currently supported by the power supply device.

17. The device to be charged according to claim 16, characterized in that: The second communication control unit is further used to obtain the battery parameters of the rechargeable battery, and control and adjust the output power of the wireless receiving circuit according to the maximum output power currently supported by the power supply device and the battery parameters of the rechargeable battery.

18. The device to be charged according to claim 16, characterized in that: The preset situation includes that the output voltage of the power supply device is lower than a preset threshold, the first indication information indicates that the output voltage of the power supply device is lower than the preset threshold, and the second communication control unit controls to reduce the output power of the wireless receiving circuit when receiving the first indication information.

19. A wireless charging method, applied to a wireless charging device, characterized in that: The wireless charging method comprises: When a preset situation occurs in the power supply device, first indication information is sent to the device to be charged, where the first indication information is used to at least indicate the preset situation.

20. The wireless charging method according to claim 19, characterized in that: The preset conditions include at least one of the following: The maximum output power supported by the power supply device changes; The output voltage of the power supply device is lower than a preset threshold.

21. The wireless charging method according to claim 20, characterized in that: The preset situation includes a change in the maximum output power supported by the power supply device, and the wireless charging method further includes: The maximum output power currently supported by the power supply device is queried to determine whether the maximum output power supported by the power supply device changes.

22. The wireless charging method according to claim 21, characterized in that: The querying of the maximum output power currently supported by the power supply device to determine whether the maximum output power supported by the power supply device changes includes: The maximum output power currently supported by the power supply device is intermittently queried, and when the maximum output power indicated by the power indication information sent by the power supply device is different from the maximum output power indicated by the power indication information received last time, it is determined that the maximum output power supported by the power supply device has changed.

23. The wireless charging method according to claim 21, characterized in that: The wireless charging method further includes: When receiving the power inquiry request sent by the device to be charged, second indication information is sent to the device to be charged to indicate the maximum output power currently supported by the power supply device.

24. The wireless charging method according to claim 21, characterized in that: The wireless charging method further includes: Stop responding to the power adjustment request sent by the device to be charged within a first preset time period; and After the first preset time period has passed, the power adjustment request sent by the device to be charged is resumed to be responded to, wherein the power adjustment request includes a power increase request for requesting to increase power.

25. The wireless charging method according to claim 21, characterized in that: The first indication information also indicates the maximum output power currently supported by the power supply device.

26. The wireless charging method according to claim 19, characterized in that: The preset condition includes that the output voltage of the power supply device is lower than a preset threshold, and the wireless charging method further includes: Detecting the output voltage of the power supply device by a voltage detection unit; and When the voltage detected by the voltage detection unit is lower than a preset threshold, it is determined that the output voltage of the power supply device is lower than the preset threshold.

27. The wireless charging method according to claim 26, characterized in that: The wireless charging method further includes: Stop responding to the power adjustment request sent by the device to be charged within a second preset time period; and After the second preset time period has passed, the power adjustment request sent by the device to be charged is resumed to be responded to, wherein the power adjustment request includes a power increase request for requesting to increase power.

28. The wireless charging method according to any one of claims 19 to 27, characterized in that: The wireless charging method further includes: When a preset situation occurs in the power supply device, the transmission power of the wireless transmission circuit of the wireless charging device is controlled and adjusted.

29. The wireless charging method according to claim 28, characterized in that: When a preset situation occurs in the power supply device, controlling and adjusting the transmission power of the wireless transmission circuit of the wireless charging device includes: When the maximum output power supported by the power supply device decreases, and / or the output voltage of the power supply device is lower than a preset threshold, control is performed to reduce the transmission power of the wireless transmission circuit.

30. A wireless charging method, applied to a device to be charged, wherein the device to be charged comprises a wireless receiving circuit, characterized in that: The wireless charging method comprises: When first indication information sent by the wireless charging device is received, the output power of the wireless receiving circuit is controlled and adjusted, wherein the first indication information is at least used to indicate that a preset situation occurs in the power supply device.

31. The wireless charging method according to claim 30, characterized in that: The preset conditions include at least one of the following: The maximum output power supported by the power supply device changes; The output voltage of the power supply device is lower than a preset threshold.

32. The wireless charging method according to claim 31, characterized in that: The preset situation includes that the maximum output power supported by the power supply device changes. After receiving the first indication information, the wireless charging method further includes: Sending a power inquiry request to the wireless charging device to inquire about the maximum output power currently supported by the power supply device; and When the second indication information indicating the maximum output power currently supported by the power supply device is received and sent by the wireless charging apparatus, the maximum output power currently supported by the power supply device is acquired.

33. The wireless charging method according to claim 31, characterized in that: The preset situation includes that the maximum output power supported by the power supply device changes, the first indication information also indicates the maximum output power currently supported by the power supply device, and the wireless charging method further includes: The maximum output power currently supported by the power supply device is obtained according to the maximum output power indicated by the first indication information.

34. The wireless charging method according to claim 32 or 33, characterized in that: The wireless charging method further includes: The output power of the wireless receiving circuit is controlled and adjusted at least according to the maximum output power currently supported by the power supply device.

35. The wireless charging method according to claim 34, characterized in that: The wireless charging method further includes: Obtaining battery parameters of a rechargeable battery of the device to be charged; The step of controlling and adjusting the output power of the wireless receiving circuit at least according to the maximum output power currently supported by the power supply device comprises: The output power of the wireless receiving circuit is controlled and adjusted according to the maximum output power currently supported by the power supply device and the battery parameters of the rechargeable battery.

36. The wireless charging method according to claim 31, characterized in that: The preset situation includes that the output voltage of the power supply device is lower than a preset threshold value, the first indication information indicates that the output voltage of the power supply device is lower than the preset threshold value, and when receiving the first indication information sent by the wireless charging device, controlling and adjusting the output power of the wireless receiving circuit includes: When the first indication information is received, the output power of the wireless receiving circuit is controlled to be reduced.

37. A wireless charging system, characterized in that: It comprises the wireless charging device as described in any one of claims 1-11 and the device to be charged as described in any one of claims 12-18.

38. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores program instructions, and the program instructions are used for the processor to call and execute the steps in the method according to any one of claims 19 to 36.

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