Wireless charging base, wireless charging method, device and storage medium

Abstract

The present application discloses a wireless charging base, a wireless charging method, an apparatus and a storage medium, and belongs to the field of wireless charging technology. The wireless charging base includes a control circuit, a first sampling circuit and a magnetic field transmitting circuit, wherein the first sampling circuit is used to measure the voltage at the input end of the magnetic field transmitting circuit and transmit the measured voltage to the control circuit, and the control circuit is used to control the magnetic field transmitting circuit to reduce the output power when it detects that the voltage at the input end of the magnetic field transmitting circuit is less than or equal to a first preset voltage threshold. When the adapter power of the wireless charging base decreases, the control circuit controls the magnetic field transmitting circuit to reduce the output power. After the output power of the wireless charging base decreases, the load of the adapter is reduced, and the adapter does not need to maintain a high current, thereby avoiding the output voltage of the adapter from continuously decreasing, ensuring that the adapter can provide power normally and charging is not interrupted.

Description

Technical Field

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

[0002] Currently, wireless charging consists of an adapter, a wireless charging base and a mobile phone. The wireless charging base and the mobile phone determine the charging power of the mobile phone and the output power of the wireless charging base through a handshake mechanism. The adapter provides power to the wireless charging base based on the output power of the wireless charging base.

[0003] In actual use, after charging for a period of time, the adapter will heat up. When the adapter temperature exceeds the temperature threshold, the adapter will activate a self-protection mechanism, thereby reducing the output power. However, since the charging load formed by the wireless charging base and the phone remains unchanged, the adapter cannot change the current to maintain the load. Therefore, its output voltage is passively lowered. When the adapter's output voltage falls below the voltage threshold, the adapter will not be able to properly supply power to the wireless charging base, resulting in charging interruption. Summary of the Invention

[0004] Based on this, the embodiments of the present application provide a wireless charging base, a wireless charging method, an apparatus, and a storage medium, which can avoid charging interruptions.

[0005] In a first aspect, a wireless charging base is provided, the wireless charging base comprising a control circuit, a first sampling circuit, and a magnetic field transmitting circuit;

[0006] The control circuit is connected to the first sampling circuit and the magnetic field transmitting circuit respectively, and the first sampling circuit is connected to the input end of the magnetic field transmitting circuit:

[0007] The first sampling circuit is used to measure the voltage at the input end of the magnetic field transmitting circuit and transmit the measured voltage to the control circuit. The magnetic field transmitting circuit is used to convert the input electrical energy into an alternating magnetic field for transmission. The control circuit is used to control the magnetic field transmitting circuit to reduce the output power when it detects that the voltage at the input end of the magnetic field transmitting circuit is less than or equal to a first preset voltage threshold.

[0008] In a second aspect, a wireless charging method is provided, which is applied to the wireless charging base described in the first aspect, and the method includes:

[0009] Detecting whether the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold;

[0010] When the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold, the output power of the wireless charging base is reduced.

[0011] In a third aspect, a wireless charging device is provided, which is applied to the wireless charging base described in the first aspect, and includes:

[0012] a detection module, configured to detect whether a voltage input to the wireless charging base is less than or equal to a first preset voltage threshold;

[0013] The power output module is used to reduce the output power of the wireless charging base when the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold.

[0014] In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the wireless charging method as described in the first aspect is implemented.

[0015] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0016] In an embodiment of the present application, a first sampling circuit is used to measure the voltage at the input end of the magnetic field transmitting circuit and transmit the measured voltage to the control circuit, wherein the voltage at the input end of the magnetic field transmitting circuit is the output voltage of the adapter, and the magnetic field transmitting circuit is used to convert the input electrical energy into an alternating magnetic field for transmission; the control circuit is used to detect whether the voltage at the input end of the magnetic field transmitting circuit is less than or equal to a first preset voltage threshold. If the voltage at the input end of the magnetic field transmitting circuit is less than or equal to the first preset voltage threshold, it indicates that the voltage provided by the adapter to the wireless charging base has decreased. This situation indicates that the adaptation power of the adapter has decreased. Based on this, the control circuit of the wireless charging base controls the magnetic field transmitting circuit to reduce the output power. After the output power of the wireless charging base is reduced, the load of the adapter is reduced, and the adapter does not need to maintain a high current, thereby avoiding a continuous decrease in the output voltage of the adapter, ensuring that the adapter can provide power normally and charging is uninterrupted. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a wireless charging architecture involved in an embodiment of the present application;

[0018] Figure 2 A circuit diagram of a wireless charging base provided in an embodiment of the present application;

[0019] Figure 3 A circuit diagram of another wireless charging base provided in an embodiment of the present application;

[0020] Figure 4 A circuit diagram of another wireless charging base provided in an embodiment of the present application;

[0021] Figure 5A circuit diagram of another wireless charging base provided in an embodiment of the present application;

[0022] Figure 6 A circuit diagram of another wireless charging base provided in an embodiment of the present application;

[0023] Figure 7 A circuit diagram of another wireless charging base provided in an embodiment of the present application;

[0024] Figure 8 A circuit diagram of another wireless charging base provided in an embodiment of the present application;

[0025] Figure 9 A flowchart of a wireless charging method provided in an embodiment of the present application;

[0026] Figure 10 A block diagram of a wireless charging device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0028] Wireless charging technology originates from wireless power transmission (WPT), also known as wireless power transmission or contactless power transmission. It involves converting electrical energy into other forms of relay energy (such as electromagnetic field energy, lasers, microwaves, and mechanical waves) through a transmitter, transmitting the energy over a distance, and then converting the relay energy back into electrical energy through a receiver. Currently, wireless charging systems based on this technology have been developed for mobile phone charging.

[0029] In order to better understand the technical solution of this application, the working principle of wireless charging is first explained below. Figure 1 As stated, Figure 1 Adapter 101, wireless charging base 102 and mobile phone 103 are shown in FIG, wherein arrows indicate the direction of current flow.

[0030] The adapter 101 is connected to a power source to supply power to the wireless charging base 102 .

[0031] The wireless charging base 102 is connected to the adapter 101 . The wireless charging base 102 includes a control circuit and a magnetic field transmitting circuit. The control circuit is used to control the magnetic field transmitting circuit to convert the electrical energy provided by the adapter 101 into an alternating magnetic field.

[0032] Mobile phone 103 is placed on wireless charging base 102. Mobile phone 103 includes a magnetic field receiving circuit, a control circuit, a charge pump, and a battery. The control circuit is connected to the magnetic field receiving circuit and the charge pump, which are connected to the battery. The control circuit is used to control the magnetic field receiving circuit and the charge pump. Mobile phone 103 generates an AC charging current based on the alternating magnetic field provided by wireless charging base 102 through the magnetic field receiving circuit. The AC charging current is converted by the charge pump into DC power that can be stored in the battery. The battery stores the electrical energy provided by the charge pump.

[0033] During the above process, insufficient power conversion causes adapter 101 to heat up. When the temperature of adapter 101 exceeds a temperature threshold, adapter 101 activates a self-protection mechanism and reduces output power. However, since the charging load formed by wireless charging base 102 and mobile phone 103 remains unchanged, in this case, the output voltage of adapter 101 is passively lowered to maintain the load. When the output voltage of adapter 101 falls below the voltage threshold, adapter 101 will not be able to properly supply power to wireless charging base 102, resulting in charging interruption.

[0034] In view of the above situation, an embodiment of the present application provides a wireless charging base, which includes a control circuit, a first sampling circuit and a magnetic field transmitting circuit, wherein the first sampling circuit is used to measure the voltage at the input end of the magnetic field transmitting circuit and transmit the measured voltage to the control circuit, wherein the voltage at the input end of the magnetic field transmitting circuit is the output voltage of the adapter, and the magnetic field transmitting circuit is used to convert the input electrical energy into an alternating magnetic field for transmission; the control circuit is used to detect whether the voltage at the input end of the magnetic field transmitting circuit is less than or equal to a first preset voltage threshold. If the voltage at the input end of the magnetic field transmitting circuit is less than or equal to the first preset voltage threshold, it indicates that the voltage provided by the adapter to the wireless charging base has decreased. This situation indicates that the adaptation power of the adapter has decreased. Based on this, the control circuit of the wireless charging base controls the magnetic field transmitting circuit to reduce the output power. After the output power of the wireless charging base is reduced, the load of the adapter is reduced, and the adapter does not need to maintain a high current, thereby avoiding the continuous decrease in the output voltage of the adapter, ensuring that the adapter can provide power normally and charging is uninterrupted.

[0035] Please refer to Figure 2 , which shows a circuit connection diagram of a wireless charging base 200 provided in an embodiment of the present application. The wireless charging base 200 includes a control circuit 201, a first sampling circuit 202, and a magnetic field transmitting circuit 203:

[0036] like Figure 2 As shown, the control circuit 201 is connected to the first sampling circuit 202 and the magnetic field transmitting circuit 203 respectively, and the first sampling circuit 202 is connected to the input end of the magnetic field transmitting circuit 203 .

[0037] The input end of the magnetic field transmitting circuit 203 is the input end of the wireless charging base 200, which is connected to the adapter. Figure 2 The middle arrow indicates the current supplied by the adapter.

[0038] In the embodiment of the present application, the first sampling circuit 202 is used to measure the voltage at the input end of the magnetic field transmitting circuit 203 and transmit the measured voltage to the control circuit 201. After receiving the voltage at the input end of the magnetic field transmitting circuit 203 from the first sampling circuit 202, the control circuit 201 detects whether the voltage at the input end of the magnetic field transmitting circuit 203 is less than or equal to a first preset voltage threshold.

[0039] If the voltage at the input end of the magnetic field transmitting circuit 203 is greater than the first preset voltage threshold, indicating that the output power of the adapter is normal, the control circuit 201 does not perform additional processing, and the output power of the magnetic field transmitting circuit 203 is also not processed.

[0040] If the voltage at the input end of the magnetic field transmitting circuit 203 is less than or equal to the first preset voltage threshold, it indicates that the output voltage of the adapter has dropped, that is, the output power of the adapter has dropped. When the control circuit 201 detects that the voltage at the input end of the magnetic field transmitting circuit 203 is less than or equal to the first preset voltage threshold, the control circuit 201 can send control information to the magnetic field transmitting circuit 203, thereby controlling the magnetic field transmitting circuit 203 to reduce the output power. The magnetic field transmitting circuit 203 is used to convert the input electrical energy into an alternating magnetic field for transmission. After receiving the control information sent by the control circuit 201, the magnetic field transmitting circuit 203 can reduce the output power during the process of converting the input electrical energy into an alternating magnetic field for transmission. In this way, the purpose of reducing the output power of the wireless charging base 200 is achieved.

[0041] When the wireless charging base reduces its output power, the magnetic field receiving circuit on the mobile phone side can receive the message that the wireless charging base has reduced its output power, and reduce its own charging power based on the output power of the wireless charging base. When the charging power on the mobile phone side is reduced, the purpose of reducing the load power is achieved, and the load of the adapter is reduced. In this way, the adapter does not need to continuously lower the output voltage to meet the load demand, thereby avoiding the continuous decrease in the output voltage of the adapter. In this way, the adapter can continuously supply power to the wireless charging base and avoid charging interruption.

[0042] Please refer to Figure 3 , which shows a circuit connection diagram of another wireless charging base 300 provided in an embodiment of the present application. In the wireless charging base 300, the control circuit includes a processing chip 301, and the magnetic field transmitting circuit 303 includes an AC / DC voltage conversion sub-circuit 3031 and a magnetic field transmitting sub-circuit 3032 connected to each other.

[0043] The processing chip 301 is connected to the AC / DC voltage conversion sub-circuit 3031 and the first sampling circuit 302 respectively, and the first sampling circuit 302 is connected to the input end of the AC / DC voltage conversion sub-circuit 3031 .

[0044] like Figure 3 As shown, the input end of the AC / DC voltage conversion sub-circuit 3031 is the input end of the wireless charging base 300, and the input end of the AC / DC voltage conversion sub-circuit 3031 is connected to the adapter. Figure 3 The middle arrow represents the current supplied by the adapter. The AC / DC voltage conversion subcircuit 3031 converts the input AC power into DC power and outputs the converted DC power to the magnetic field emission subcircuit 3032. The magnetic field emission subcircuit 3032 is used to convert the input DC power into AC power and, under the stimulation of the converted AC power, emit an alternating magnetic field.

[0045] In the embodiment of the present application, the first sampling circuit 302 is used to measure the voltage at the input end of the AC / DC voltage conversion sub-circuit 3031 and provide the measured voltage to the processing chip 301. After receiving the voltage at the input end of the AC / DC voltage conversion sub-circuit 3031 from the first sampling circuit 302, the processing chip 301 detects whether the voltage at the input end of the AC / DC voltage conversion sub-circuit 3031 is less than or equal to a first preset voltage threshold.

[0046] If the voltage at the input end of the AC / DC voltage conversion sub-circuit 3031 is greater than the first preset voltage threshold, indicating that the output power of the adapter is normal, the processing chip 301 does not perform additional processing, and the magnetic field emission sub-circuit 3032 converts the DC power input by the AC / DC voltage conversion sub-circuit 3031 into AC power, and emits an alternating magnetic field under the excitation of the converted AC power.

[0047] If the voltage at the input of the AC / DC voltage conversion sub-circuit 3031 is less than or equal to a first preset voltage threshold, it indicates that the adapter's output voltage has decreased, that is, the adapter's output power has decreased. The processing chip 301 can then send first control information to the AC / DC voltage conversion sub-circuit 3031, thereby controlling the AC / DC voltage conversion sub-circuit 3031 to reduce the voltage of the DC power it outputs. Upon receiving the first control information, the AC / DC voltage conversion sub-circuit 3031 reduces the voltage of the DC power it outputs.

[0048] Since the voltage of the DC power output by the AC / DC voltage conversion sub-circuit 3031 after receiving the first control information is lower than the voltage of the DC power output by the AC / DC voltage conversion sub-circuit 3031 before receiving the first control information, the magnetic field emission sub-circuit 3032 converts the input DC power into AC power, and its output power also decreases in the process of emitting an alternating magnetic field under the excitation of the converted AC power.

[0049] In an optional implementation, Figure 4 As shown, Figure 4 In the embodiment, the processing chip 301 is further connected to the magnetic field emission sub-circuit 3032. The processing chip 301 is further configured to control the magnetic field emission sub-circuit 3032 to increase the duty cycle of the converted alternating current and / or to control the magnetic field emission sub-circuit 3032 to reduce the frequency of the converted alternating current when detecting that the voltage at the input terminal of the AC / DC voltage conversion sub-circuit 3031 is less than or equal to a first preset voltage threshold.

[0050] Based on the above embodiment, if the voltage at the input of the AC / DC voltage conversion subcircuit 3031 is less than or equal to the first preset voltage threshold, the processing chip 301 may further transmit a duty cycle parameter and / or a frequency parameter to the magnetic field transmitting subcircuit 3032. Upon receiving the duty cycle parameter and / or the frequency parameter, the magnetic field transmitting subcircuit 3032 may increase the duty cycle of the converted AC power according to the duty cycle parameter and / or decrease the frequency of the converted AC power according to the frequency parameter. During the process of converting DC power to AC power, the magnetic field transmitting subcircuit 3032 increases the duty cycle of the converted AC power and / or decreases the frequency of the converted AC power, thereby reducing the output power. On the one hand, due to the decrease in the voltage at the output of the AC / DC voltage conversion subcircuit 3031, that is, the decrease in the voltage at the input of the magnetic field transmitting subcircuit 3032, on the other hand, due to the increase in the duty cycle of the AC power and / or the decrease in the frequency of the AC power during the process of converting DC power to AC power, the output power of the magnetic field transmitting subcircuit 3032 is reduced. This prevents the output voltage of the adapter from continuously decreasing, ensuring that the adapter can provide power normally and charging is uninterrupted.

[0051] Please refer to Figure 5 , which shows a circuit connection diagram of another wireless charging base 500 provided in an embodiment of the present application. In the wireless charging base 500, the wireless charging base 500 further includes a second sampling circuit 505, which is connected to the output end of the AC / DC voltage conversion sub-circuit 503 and the processing chip 501 respectively.

[0052] like Figure 5 As shown, the processing chip 501 is connected to the AC / DC voltage conversion sub-circuit 503 and the magnetic field emission sub-circuit 504 respectively, the AC / DC voltage conversion sub-circuit 503 and the magnetic field emission sub-circuit 504 are connected, the first sampling circuit 502 is connected between the input end of the AC / DC voltage conversion sub-circuit 503 and the processing chip 501, and the second sampling circuit 505 is connected between the output end of the AC / DC voltage conversion sub-circuit 503 and the processing chip 501.

[0053] The input end of the AC / DC voltage conversion sub-circuit 503 is the input end of the wireless charging base 500, and the input end of the AC / DC voltage conversion sub-circuit 503 is connected to the adapter. Figure 5 The middle arrow represents the current supplied by the adapter. The AC / DC voltage conversion subcircuit 503 converts the input AC power into DC power and outputs the converted DC power to the magnetic field emission subcircuit 504. The magnetic field emission subcircuit 504 is used to convert the input DC power into AC power and, under the stimulation of the converted AC power, emit an alternating magnetic field.

[0054] In the embodiment of the present application, the first sampling circuit 502 is used to measure the voltage at the input end of the AC / DC voltage conversion sub-circuit 503 and provide the measured voltage to the processing chip 501. After the processing chip 501 receives the voltage at the input end of the AC / DC voltage conversion sub-circuit 503 from the first sampling circuit 502, it detects whether the voltage at the input end of the AC / DC voltage conversion sub-circuit 503 is less than or equal to a first preset voltage threshold.

[0055] If the voltage at the input terminal of the AC / DC voltage conversion sub-circuit 503 is greater than the first preset voltage threshold, the processing chip 501 does not perform additional processing.

[0056] If the voltage at the input of the AC / DC voltage conversion subcircuit 503 is less than or equal to a first preset voltage threshold, it indicates that the output voltage of the adapter has decreased, that is, the output power of the adapter has decreased. The processing chip 501 can then control the AC / DC voltage conversion subcircuit 503 to reduce the voltage of the output DC power. The second sampling circuit 505 can then measure the voltage at the output of the AC / DC voltage conversion subcircuit 503 and provide the measured voltage to the processing chip 501. After obtaining the voltage at the output of the AC / DC voltage conversion subcircuit 503, the processing chip 501 can detect whether the voltage at the output of the AC / DC voltage conversion subcircuit 503 is less than or equal to a second preset voltage threshold. If the voltage at the output of the AC / DC voltage conversion subcircuit 503 is less than or equal to the second preset voltage threshold, the processing chip 501 can control the field emission subcircuit 504 to increase the duty cycle of the converted AC power and / or control the magnetic field emission subcircuit 504 to reduce the frequency of the converted AC power.

[0057] If the voltage at the output end of the AC / DC voltage conversion sub-circuit 503 is greater than the second preset voltage threshold, the processing chip 501 continues to control the AC / DC voltage conversion sub-circuit 503 to reduce the voltage of the output DC power until the voltage at the output end of the AC / DC voltage conversion sub-circuit 503 is less than or equal to the second preset voltage threshold.

[0058] Please refer to Figure 6, which shows a circuit diagram of another wireless charging base 600 provided by an embodiment of the present application. In the wireless charging base 600, the control circuit of the wireless charging base 600 further includes a comparison circuit 602, a magnetic field transmitting circuit 603 includes an AC / DC voltage conversion subcircuit 604 and a magnetic field transmitting subcircuit 605 connected to each other, and the AC / DC voltage conversion subcircuit 604 includes a conversion control subcircuit 606 and a conversion switch subcircuit 607 connected to each other. Figure 6 As shown, the comparison circuit 602 is connected to the conversion control subcircuit 606 and the first sampling circuit 608 respectively, the first sampling circuit 608 is connected to the conversion switch subcircuit 607, and the conversion switch subcircuit 607 is connected to the magnetic field emission subcircuit 605.

[0059] In the embodiment of the present application, the input end of the conversion switch sub-circuit 607 is the input end of the wireless charging base 600, and the input end of the conversion switch sub-circuit 607 is connected to the adapter. Figure 6 The arrow in the middle represents the current supplied by the adapter. The conversion switch subcircuit 607 is used to convert the input AC power into DC power under the control of the conversion control subcircuit 606 and output the converted DC power to the magnetic field emission subcircuit 605. The magnetic field emission subcircuit 605 is used to convert the input DC power into AC power and emit an alternating magnetic field under the stimulation of the converted AC power.

[0060] In an embodiment of the present application, the first sampling circuit 608 is used to convert the voltage of the input end of the switch sub-circuit 607 and provide the measured voltage to the comparison circuit 602. After the comparison circuit 602 obtains the voltage of the input end of the switch sub-circuit 607 from the first sampling circuit 608, the comparison circuit 602 can compare the voltage of the input end of the switch sub-circuit 607 with the first preset voltage threshold and pass the comparison result to the conversion control sub-circuit 606.

[0061] The comparison result includes two cases: one case is that the comparison result indicates that the voltage at the input end of the switching sub-circuit 607 is less than or equal to the first preset voltage threshold; the other case is that the comparison result indicates that the voltage at the input end of the switching sub-circuit 607 is greater than the first preset voltage threshold.

[0062] If the comparison result indicates that the voltage at the input terminal of the switch sub-circuit 607 is greater than the first preset voltage threshold, the control sub-circuit 606 does not perform additional processing.

[0063] If the comparison result indicates that the voltage at the input terminal of the conversion switch sub-circuit 607 is less than or equal to the first preset voltage threshold, the control sub-circuit 606 controls the conversion switch sub-circuit 607 to reduce the voltage of the output DC power. The magnetic field transmitting circuit 605 converts the DC power reduced by the conversion switch sub-circuit 607 into AC power and, under the stimulation of the converted AC power, emits an alternating magnetic field. For the magnetic field transmitting circuit 605, since the voltage of the input DC power is reduced, the output power of the magnetic field transmitting circuit 605 is reduced, thereby achieving the purpose of reducing output power.

[0064] Based on the above examples, please refer to Figure 7 , Figure 7 The control circuit of the wireless charging base 600 shown further includes a processing chip 601 , which is connected to a conversion control subcircuit 606 and a magnetic field emission subcircuit 605 , respectively.

[0065] In the embodiment of the present application, after the comparison circuit 602 transmits the comparison result to the conversion control subcircuit 606, the conversion control subcircuit 606 may transmit the comparison result to the processing chip.

[0066] As can be seen above, the comparison result includes two situations. When the comparison result indicates that the voltage at the input terminal of the conversion switch sub-circuit 607 is less than or equal to the first preset voltage threshold, the processing chip 601 can control the magnetic field emission sub-circuit 605 to increase the duty cycle of the converted AC power and / or control the magnetic field emission sub-circuit 605 to reduce the frequency of the converted AC power.

[0067] When the comparison result indicates that the voltage at the input terminal of the switch sub-circuit 607 is greater than the first preset voltage threshold, the processing chip 601 does not perform additional processing.

[0068] Please refer to Figure 8 , which shows a circuit diagram of another wireless charging base 800 provided in an embodiment of the present application. The wireless charging base 800 also includes a third sampling circuit 809, which is connected to the output ends of the conversion control subcircuit 806 and the conversion switch subcircuit 807 respectively.

[0069] like Figure 8 As shown, the control circuit of the wireless charging base 800 also includes a comparison circuit 802. The magnetic field transmission circuit 803 includes an AC / DC voltage conversion subcircuit 804 and a magnetic field transmission subcircuit 805 connected to each other. The AC / DC voltage conversion subcircuit 804 includes a conversion control subcircuit 806 and a conversion switch subcircuit 807 connected to each other. The comparison circuit 802 is connected to the conversion control subcircuit 806 and the first sampling circuit 808, respectively. The first sampling circuit 808 is connected to the conversion switch subcircuit 807, and the conversion switch subcircuit 807 is connected to the magnetic field transmission subcircuit 805.

[0070] In an embodiment of the present application, the first sampling circuit 808 is used to measure the voltage at the input end of the conversion switch sub-circuit 807 and provide the measured voltage to the comparison circuit 802. After the comparison circuit 802 obtains the voltage at the input end of the conversion switch sub-circuit 807 from the first sampling circuit 808, the comparison circuit 802 can compare the voltage at the input end of the conversion switch sub-circuit 807 with the first preset voltage threshold and pass the comparison result to the conversion control sub-circuit 806.

[0071] If the comparison result indicates that the voltage at the input of the switching sub-circuit 807 is less than or equal to the first preset voltage threshold, the control sub-circuit controls the switching sub-circuit 807 to reduce the voltage of the DC power output. Then, the third sampling circuit 809 measures the voltage at the output of the switching sub-circuit 807 and transmits the measured voltage to the conversion control sub-circuit 806. After obtaining the voltage at the output of the switching sub-circuit 807, the conversion control sub-circuit can detect whether the voltage at the output of the switching sub-circuit 807 is less than or equal to the third preset voltage threshold. If the voltage at the output of the switching sub-circuit 807 is less than or equal to the third preset voltage threshold, it indicates that the voltage at the output of the switching sub-circuit 807 has decreased. Therefore, the conversion control sub-circuit transmits the comparison result to the processing chip 801. If the voltage at the output end of the conversion switch sub-circuit 807 is greater than the third preset voltage threshold, it means that the voltage at the output end of the conversion switch sub-circuit 807 has not decreased. In this case, the control sub-circuit continues to control the conversion switch sub-circuit 807 to reduce the voltage of the output DC power until the voltage at the output end of the conversion switch sub-circuit 807 is less than or equal to the third preset voltage threshold.

[0072] like Figure 9 As shown, Figure 9 A flow chart of a wireless charging method is shown. The wireless charging method is applied to the wireless charging base described in any of the above embodiments. The wireless charging method includes the following steps:

[0073] In step 901 , the wireless charging base detects whether a voltage input to the wireless charging base is less than or equal to a first preset voltage threshold.

[0074] The wireless charging base includes a first sampling circuit, a control circuit and a magnetic field transmitting circuit.

[0075] In an embodiment of the present application, the first sampling circuit in the wireless charging base can be used to measure the voltage input to the wireless charging base. After obtaining the voltage input to the wireless charging base, the control circuit can detect whether the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold.

[0076] Step 902 : When the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold, the wireless charging base reduces the output power of the wireless charging base.

[0077] When the voltage input to the wireless charging base is less than or equal to the first preset voltage threshold, it indicates that the output power of the adapter has decreased. In this case, the magnetic field transmitting circuit of the wireless charging base can reduce the output power of the wireless charging base.

[0078] In an embodiment of the present application, when the wireless charging base detects whether the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold, it determines that the adaptation power of the adapter has decreased. Based on this, the magnetic field transmitting circuit is controlled to reduce the output power. After the output power of the wireless charging base is reduced, the load on the adapter is reduced, and the adapter does not need to maintain a high current. This avoids the continuous decrease in the output voltage of the adapter, ensuring that the adapter can provide power normally and charging is not interrupted.

[0079] Please refer to Figure 10 , which shows a block diagram of a wireless charging device 1000 provided in an embodiment of the present application. The wireless charging device 1000 can be configured in the wireless charging base described in the above embodiment. Figure 10 As shown, the wireless charging device 1000 may include: a detection module 1001 and a power output module 1002 .

[0080] A detection module 1001 is configured to detect whether a voltage input to the wireless charging base is less than or equal to a first preset voltage threshold;

[0081] The power output module 1002 is configured to reduce the output power of the wireless charging base when the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold.

[0082] For the specific definition of the wireless charging device, please refer to the definition of the wireless charging method above and will not be repeated here. Each module in the above-mentioned wireless charging device can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software so that the processor can call and execute the operations of the above-mentioned modules.

[0083] In one embodiment of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0084] Detecting whether the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold;

[0085] When the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold, the output power of the wireless charging base is reduced.

[0086] The computer-readable storage medium provided in this embodiment has similar implementation principles and technical effects to those of the above-mentioned method embodiment, and will not be described in detail here.

[0087] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0088] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A wireless charging base, characterized in that: The wireless charging base includes a control circuit, a first sampling circuit and a magnetic field transmitting circuit; The control circuit is connected to the first sampling circuit and the magnetic field transmitting circuit respectively, and the first sampling circuit is connected to the input end of the magnetic field transmitting circuit: The first sampling circuit is used to measure the voltage at the input end of the magnetic field transmitting circuit and transmit the measured voltage to the control circuit. The magnetic field transmitting circuit is used to convert the input electrical energy into an alternating magnetic field for transmission. The control circuit is used to control the magnetic field transmitting circuit to reduce the output power when it detects that the voltage at the input end of the magnetic field transmitting circuit is less than or equal to a first preset voltage threshold; and not process the output power of the magnetic field transmitting circuit when it detects that the voltage at the input end of the magnetic field transmitting circuit is greater than the first preset voltage threshold. The control circuit includes a comparison circuit, the magnetic field emission circuit includes an interconnected AC / DC voltage conversion subcircuit and a magnetic field emission subcircuit, the AC / DC voltage conversion subcircuit includes an interconnected conversion control subcircuit and a conversion switch subcircuit, the comparison circuit is connected to the conversion control subcircuit and the first sampling circuit, respectively, and the conversion switch subcircuit is connected to the magnetic field emission subcircuit; the comparison circuit is used to compare the voltage at the input end of the conversion switch subcircuit with the first preset voltage threshold and transmit the comparison result to the conversion control subcircuit; the conversion control subcircuit is used to control the conversion switch subcircuit to reduce the voltage of the output DC power when the comparison result indicates that the voltage at the input end of the conversion switch subcircuit is less than or equal to the first preset voltage threshold.

2. The wireless charging base according to claim 1, characterized in that: The control circuit includes a processing chip, and the magnetic field emission circuit includes an AC / DC voltage conversion subcircuit and a magnetic field emission subcircuit connected to each other, wherein: The processing chip is connected to the AC / DC voltage conversion sub-circuit and the first sampling circuit respectively, and the first sampling circuit is connected to the input end of the AC / DC voltage conversion sub-circuit; The AC / DC voltage conversion subcircuit is used to convert the input AC power into DC power, and the magnetic field emission subcircuit is used to convert the DC power output by the AC / DC voltage conversion subcircuit into AC power, and emit an alternating magnetic field under the excitation of the converted AC power; The processing chip is configured to control the AC / DC voltage conversion subcircuit to reduce the voltage of the output DC power when detecting that the voltage at the input end of the AC / DC voltage conversion subcircuit is less than or equal to the first preset voltage threshold.

3. The wireless charging base according to claim 2, characterized in that: The processing chip is also connected to the magnetic field emission sub-circuit; The processing chip is further configured to, upon detecting that the voltage at the input end of the AC / DC voltage conversion subcircuit is less than or equal to the first preset voltage threshold, control the magnetic field emission subcircuit to increase the duty cycle of the converted AC power, and / or control the magnetic field emission subcircuit to reduce the frequency of the converted AC power.

4. The wireless charging base according to claim 3, characterized in that: The wireless charging base further includes a second sampling circuit, which is connected to the output end of the AC / DC voltage conversion sub-circuit and the processing chip respectively; The second sampling circuit is used to measure the voltage at the output end of the AC / DC voltage conversion sub-circuit and transmit the measured voltage to the processing chip; The processing chip is further configured to control the magnetic field emission subcircuit to increase the duty cycle of the converted alternating current, and / or control the magnetic field emission subcircuit to reduce the frequency of the converted alternating current, when the voltage at the output end of the AC / DC voltage conversion subcircuit is less than or equal to a second preset voltage threshold and the voltage at the input end of the AC / DC voltage conversion subcircuit is less than or equal to the first preset voltage threshold.

5. The wireless charging base according to claim 4, characterized in that: The processing chip is further configured to, when the voltage at the output end of the AC / DC voltage conversion subcircuit is greater than the second preset voltage threshold and the voltage at the input end of the AC / DC voltage conversion subcircuit is less than or equal to the first preset voltage threshold, continuously control the AC / DC voltage conversion subcircuit to reduce the voltage of the output DC power until the voltage at the output end of the AC / DC voltage conversion subcircuit is less than or equal to the second preset voltage threshold.

6. The wireless charging base according to claim 1, wherein: The control circuit is used to send control information to the magnetic field transmitting circuit, so as to control the magnetic field transmitting circuit to reduce output power based on the control information.

7. The wireless charging base according to claim 1, wherein: The control circuit further includes a processing chip, and the processing chip is connected to the conversion control subcircuit and the magnetic field emission subcircuit respectively; The conversion control subcircuit is further configured to transmit the comparison result to the processing chip; The processing chip is configured to control the magnetic field emission subcircuit to increase the duty cycle of the converted alternating current, and / or control the magnetic field emission subcircuit to reduce the frequency of the converted alternating current when the comparison result indicates that the voltage at the input end of the conversion switch subcircuit is less than or equal to the first preset voltage threshold.

8. The wireless charging base according to claim 7, characterized in that: The wireless charging base further includes a third sampling circuit, wherein the third sampling circuit is connected to the output ends of the conversion control subcircuit and the conversion switch subcircuit respectively; The third sampling circuit is used to measure the voltage at the output end of the conversion switch subcircuit and transmit the measured voltage to the conversion control subcircuit; The conversion control subcircuit is further configured to transmit the comparison result to the processing chip when the voltage at the output end of the conversion switch subcircuit is less than or equal to a third preset voltage threshold and the voltage at the input end of the conversion switch subcircuit is less than or equal to the first preset voltage threshold.

9. The wireless charging base according to claim 8, characterized in that: The conversion control subcircuit is further configured to, when the voltage at the output end of the conversion switch subcircuit is greater than the third preset voltage threshold and the voltage at the input end of the conversion switch subcircuit is less than or equal to the first preset voltage threshold, continuously control the conversion switch subcircuit to reduce the voltage of the output direct current until the voltage at the output end of the conversion switch subcircuit is less than or equal to the third preset voltage threshold.

10. A wireless charging method, characterized in that: The method is applied to the wireless charging base according to any one of claims 1 to 9, and the method comprises: Detecting whether the voltage input to the wireless charging base is less than or equal to a first preset voltage threshold; When the voltage input to the wireless charging base is less than or equal to the first preset voltage threshold, the output power of the wireless charging base is reduced.

11. A wireless charging device, characterized in that: The device is applied to the wireless charging base according to any one of claims 1 to 9, and the device includes: a detection module, configured to detect whether a voltage input to the wireless charging base is less than or equal to a first preset voltage threshold; The power output module is configured to reduce the output power of the wireless charging base when the voltage input to the wireless charging base is less than or equal to the first preset voltage threshold.

12. A computer-readable storage medium, characterized in that A computer program is stored thereon, and when the computer program is executed by a processor, the wireless charging method according to claim 10 is implemented.

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