Power supply circuit, charging device and charging method

Abstract

The invention discloses a power supply circuit, charging equipment and a charging method, and belongs to the technical field of electronic equipment. The power supply circuit comprises a filtering and rectifying assembly; the rear-stage functional assembly is connected with the filtering and rectifying assembly; the first end of the filtering energy storage assembly is connected with the filtering rectification assembly; the first end of the first switching device is connected with the second end of the filtering energy storage assembly, and the second end of the first switching device is connected with the post-stage functional assembly; the first sampling end of the sampling assembly is connected with the output end of the filtering rectification assembly, the second sampling end of the sampling assembly is connected with the filtering energy storage assembly, the first sampling end is used for collecting a first voltage value, and the second sampling end is used for collecting a second voltage value; and the control assembly is connected with the signal output end of the sampling assembly, and the control assembly is connected with the control end of the first switching device.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and specifically relates to a power supply circuit, a charging device and a charging method. Background Art

[0002] With the development of fast charging technology, the charging experience has been greatly improved. However, as the charging power of the fast charging system increases, the size of the charging equipment also increases. In particular, the size of the filter energy storage module needs to be greatly increased to meet the device parameter requirements.

[0003] How to reduce the size of charging equipment during high-power fast charging and continuously improve consumers' charging and carrying experience has become an urgent problem that needs to be solved. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a power supply circuit, a charging device and a charging method, which solve the problem of the charging device being too large due to the large volume of the filtering energy storage component.

[0005] In a first aspect, an embodiment of the present application provides a power supply circuit, comprising: a filter and rectifier component; a post-stage functional component, connected to the filter and rectifier component; a filter energy storage component, a first end of the filter energy storage component is connected to the filter and rectifier component; a first switching device, a first end of the first switching device is connected to the second end of the filter energy storage component, and the second end of the first switching device is connected to the post-stage functional component; a sampling component, a first sampling end of the sampling component is connected to the output end of the filter and rectifier component, a second sampling end of the sampling component is connected to the filter energy storage component, the first sampling end is used to collect a first voltage value, and the second sampling end is used to collect a second voltage value; a control component, connected to the signal output end of the sampling component, the control component is connected to the control end of the first switching device, and the control component is used to control the on-off state of the first switching device according to the first voltage value and the second voltage value.

[0006] In a second aspect, an embodiment of the present application provides a charging device, including: a power supply circuit in any of the above technical solutions.

[0007] In a third aspect, an embodiment of the present application provides a charging method, which is applied to the charging device in any of the above-mentioned technical solutions. The charging method includes: obtaining a first voltage value and a second voltage value collected by a sampling component; and controlling the on-off state of a first switching device according to the first voltage value and the second voltage value.

[0008] In a fourth aspect, an embodiment of the present application provides a charging device, which is applied to the charging equipment in any of the above-mentioned technical solutions, and the charging device includes: an acquisition module, which is used to acquire a first voltage value and a second voltage value collected by a sampling component; and a control module, which is used to control the on-off state of a first switching device according to the first voltage value and the second voltage value.

[0009] In a fifth aspect, an embodiment of the present application provides an electronic device, including a processor and a memory, wherein the memory stores programs or instructions that can be executed on the processor, and when the programs or instructions are executed by the processor, the steps of the method of the third aspect are implemented.

[0010] In a sixth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the method of the third aspect are implemented.

[0011] In the seventh aspect, an embodiment of the present application provides a chip, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the steps of the method of the third aspect.

[0012] In an eighth aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the method of the third aspect.

[0013] In the embodiment of the present application, a first switching device is provided between the filter energy storage component and the subsequent functional component, and a sampling component capable of collecting the first voltage value of the output electrical signal of the filter rectifier component and the second voltage value in the filter energy storage component is provided, as well as a control component for controlling the on-off state of the first switching device, so that the control component can control the on-off state of the first switching device according to the first voltage value and the second voltage value, thereby reducing the time for the filter energy storage component to supply power to the subsequent functional component, making the filter rectifier component supply power to the subsequent functional component for a longer time, reducing the time for the capacitor in the filter energy storage component to affect the current distortion, making the power supply harmonic current better, and shortening the discharge time of the filter energy storage component, which can greatly reduce the energy storage parameter requirements of the filter energy storage component, thereby reducing the volume and cost of the filter energy storage component, and solving the problem of excessive volume of the charging device due to the large volume of the filter energy storage component. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 One of the topological diagrams of the power supply circuit provided in some embodiments of the present application is shown;

[0015] Figure 2 A second topological diagram of a power supply circuit provided in some embodiments of the present application is shown;

[0016] Figure 3 A third topological diagram of a power supply circuit provided in some embodiments of the present application is shown;

[0017] Figure 4 A fourth topological diagram of a power supply circuit provided in some embodiments of the present application is shown;

[0018] Figure 5 shows a voltage curve diagram of a power supply grid provided in some embodiments of the present application;

[0019] Figure 6 A voltage curve diagram of the output of the filter rectifier assembly provided in some embodiments of the present application is shown;

[0020] Figure 7 A working state curve diagram of a filtering energy storage component provided in some embodiments of the present application is shown;

[0021] Figure 8 A schematic block diagram of a charging device provided in some embodiments of the present application is shown;

[0022] Fig. 9 A flowchart of a charging method provided in some embodiments of the present application is shown;

[0023] Fig.10 A schematic block diagram of a charging device provided in some embodiments of the present application is shown;

[0024] Fig.11 A structural block diagram of an electronic device according to an embodiment of the present application is shown;

[0025] Fig.12 A schematic diagram of the hardware structure of an electronic device provided in some embodiments of the present application is shown.

[0026] Figure 1 , Figure 2 , Figure 3 and Figure 4 The reference numerals are as follows:

[0027] 100 power supply circuit, 110 filter and rectifier component, 120 post-stage functional component, 130 filter and energy storage component, 140 first switch device, 150 second switch device, 152 diode, 162 unidirectional conduction device, 164 third switch device, 170 control component, 171 processing module, 172 first control module, 173 first level conversion module, 174 second control module, 175 second level conversion module, 180 sampling component, 182 first detection module, 184 second detection module, 186 voltage comparison module. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0029] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0030] The following is combined with Figures 1 to 12 , the power supply circuit, charging device and charging method provided in the embodiments of the present application are described in detail through specific embodiments and their application scenarios.

[0031] In some embodiments of the present application, a power supply circuit is provided. Figure 1 One of the topological diagrams of the power supply circuit provided in some embodiments of the present application is shown. Figure 2 FIG2 shows a second topological diagram of a power supply circuit provided in some embodiments of the present application. Figure 3 The third topological diagram of the power supply circuit provided in some embodiments of the present application is shown. Figure 4 FIG. 4 shows a topological diagram of a power supply circuit provided in some embodiments of the present application, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the power supply circuit 100 includes: a filtering and rectifying component 110 , a post-stage functional component 120 , a filtering and energy storage component 130 , a first switching device 140 , a sampling component 180 and a control component 170 .

[0032] Among them, the post-stage functional component 120 is connected to the filter and rectifier component 110; the first end of the filter and energy storage component 130 is connected to the filter and rectifier component 110; the first end of the first switch device 140 is connected to the filter and energy storage component 130, and the second end of the first switch device 140 is connected to the post-stage functional component 120; the first sampling end of the sampling component 180 is connected to the output end of the filter and rectifier component 110, and the second sampling end of the sampling component 180 is connected to the filter and energy storage component 130, the first sampling end is used to collect the first voltage value, and the second sampling end is used to collect the second voltage value; the control component 170 is connected to the signal output end of the sampling component 180, the control component 170 is connected to the control end of the first switch device 140, and the control component 170 is used to control the on-off state of the first switch device 140 according to the first voltage value and the second voltage value.

[0033] In an embodiment of the present application, the input end of the filter and rectifier component 110 is connected to the power supply grid, and the output end of the filter and rectifier component 110 is connected to the subsequent functional component 120. The filter and rectifier component 110 can filter and rectify the electrical signal input from the power supply grid to the power supply circuit 100, and the electrical signal rectified by the filter and rectifier component 110 can be directly transmitted to the subsequent functional component 120 for power supply.

[0034] Figure 5 1 shows a voltage curve diagram of a power supply grid provided in some embodiments of the present application, such as Figure 5 As shown, the voltage of the power supply grid is a sinusoidal voltage.

[0035] Figure 6 FIG. 4 shows a voltage curve diagram of the output of the filter rectifier assembly provided in some embodiments of the present application, such as Figure 6 As shown, the voltage output by the filter and rectifier component 110 is a DC high voltage.

[0036] In the embodiment of the present application, the first end of the filter rectifier component 110 is also the output end, the first end of the filter rectifier component 110 is connected to the first end of the filter energy storage component 130, the first end of the filter energy storage component 130 is the input end, and the filter rectifier component 110 can transmit the rectified electrical signal to the first end of the filter energy storage component 130, so as to store the electrical energy in the filter energy storage component 130. The second end of the filter energy storage component 130 is connected to the first end of the first switch device 140, and the second end of the first switch device 140 is connected to the subsequent functional component 120. When the first switch device 140 is turned on, the filter energy storage component 130 can also transmit the electrical energy stored in itself to the subsequent functional component 120 through the first switch device 140 to power the subsequent functional component 120. The on-off state of the first switch device 140 can control whether the filter energy storage component 130 supplies power to the subsequent functional component 120. When the first switch device 140 is in the on state, the filter energy storage component 130 can supply power to the subsequent functional component 120. When the first switch device 140 is in the off state, the filter energy storage component 130 stops supplying power to the subsequent functional component 120.

[0037] In the embodiment of the present application, the sampling component 180 includes a first sampling terminal and a second sampling terminal, the first sampling terminal is connected to the output terminal of the filter and rectifier component 110, and the first sampling terminal can collect the first voltage value of the electrical signal output by the filter and rectifier component 110, and the second sampling terminal is connected to the filter energy storage component 130, and the second sampling terminal can collect the second voltage value in the filter energy storage component 130. The control component 170 is connected to the sampling component 180, and the control component 170 can receive the first voltage value and the second voltage value collected by the sampling component 180, and control the on-off state of the first switch device 140 according to the first voltage value and the second voltage value, thereby controlling the charge and discharge state of the filter energy storage component 130.

[0038] Figure 7 FIG. 4 shows a working state curve diagram of the filtering energy storage assembly provided in some embodiments of the present application, such as Figure 7As shown, in the stage from T0 to T1, the first voltage value is greater than the second voltage value, and the first voltage value increases with time, the first switch device 140 is controlled to be disconnected, the filter energy storage component 130 is in a charging state, and the electric signal output by the filter rectifier component 110 simultaneously charges the filter energy storage component 130 and supplies power to the subsequent functional component 120. In the stage from T1 to T11, the first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is greater than or equal to the voltage threshold, the first switch device 140 is controlled to be disconnected, the filter energy storage component does not discharge and charge, and the filter rectifier component 110 directly supplies power to the subsequent functional component 120. In the stage from T11 to T12, the first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is less than the voltage threshold, the first switch device 140 is controlled to be turned on, the filter energy storage component 130 is in a discharging state, and the filter energy storage component 130 discharges to supply power to the subsequent functional component 120.

[0039] In the embodiment of the present application, a first switch device 140 is provided between the filter energy storage component 130 and the subsequent functional component 120, and a sampling component 180 capable of collecting the first voltage value of the output electrical signal of the filter rectifier component 110 and the second voltage value in the filter energy storage component 130 is provided, and a control component 170 for controlling the on-off state of the first switch device 140 is provided, so that the control component 170 can control the on-off state of the first switch device 140 according to the first voltage value and the second voltage value, thereby reducing the duration of power supply from the filter energy storage component 130 to the subsequent functional component 120, making the power supply duration of the filter rectifier component 110 to the subsequent functional component 120 longer, reducing the time for the capacitor in the filter energy storage component 130 to affect the current distortion, making the power supply harmonic current better, and the discharge time of the filter energy storage component 130 shorter, which can greatly reduce the energy storage parameter requirements of the filter energy storage component 130, thereby reducing the volume and cost of the filter energy storage component 130, and solving the problem of excessive volume of the charging device due to the large volume of the filter energy storage component 130.

[0040] like Figure 1 As shown, in some embodiments of the present application, the power supply circuit 100 also includes: a second switching device 150, the first end of the second switching device 150 is connected to the filter rectifier component 110, the second end of the second switching device 150 is connected to the filter energy storage component 130, and the control end of the second switching device 150 is connected to the control component 170.

[0041] In an embodiment of the present application, the second switching device 150 is arranged between the filter rectifier component 110 and the filter energy storage component 130. The electrical signal output by the filter rectifier component 110 is transmitted to the filter energy storage component 130 through the second switching device 150, so that the filter energy storage component 130 stores the electrical energy output by the filter rectifier component 110.

[0042] In some embodiments, the second switching device 150 may be a unidirectional conductive device, and the second switching device 150 is unidirectionally conductive from the first end to the second end.

[0043] In some other embodiments, the second switch device 150 may be a controllable switch device, and the control end of the second switch device 150 is connected to the control component 170, and the control component 170 can control the on-off state of the second switch device 150. The control component 170 can determine whether to turn on the second switch device 150 according to the first voltage value and the second voltage value.

[0044] like Figure 7 As shown, in the stage from T0 to T1, the first voltage value is greater than the second voltage value, and the first voltage value increases with time, the first switch device 140 is controlled to be disconnected, and the second switch device 150 is controlled to be turned on, the filter energy storage component 130 is in a charging state, and the electrical signal output by the filter rectifier component 110 simultaneously charges the filter energy storage component 130 and supplies power to the subsequent functional component 120. In the stage from T1 to T11, the first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is greater than or equal to the voltage threshold, the first switch device 140 and the second switch device 150 are controlled to be in a disconnected state, the filter energy storage component 130 does not discharge or charge, and the filter rectifier component 110 directly supplies power to the subsequent functional component 120. In the stage from T11 to T12, the first voltage value decreases with time, the first voltage value is less than the second voltage value, the first voltage value is less than the voltage threshold, the first switch device 140 is controlled to be turned on, and the second switch device 150 is turned off, the filter energy storage component 130 is in a discharge state, and the filter energy storage component 130 discharges to supply power to the subsequent functional component 120. Among them, the voltage threshold can be set according to actual needs, and the value range of the voltage threshold is from the minimum working voltage of the subsequent functional component 120 to the grid working voltage.

[0045] In an embodiment of the present application, a second switching device 150 is provided between the filter rectifier component 110 and the filter energy storage component 130, and the on-off state between the filter rectifier component 110 and the filter energy storage component 130 is controlled by the second switching device 150, thereby controlling whether the filter energy storage component 130 is in a charging state, further extending the time for the filter rectifier component 110 to directly supply power to the subsequent functional component 120, thereby improving the energy efficiency of the power supply circuit 100.

[0046] like Figure 1 As shown, in some embodiments of the present application, the control component 170 includes:

[0047] A processing module 171, a first end of the processing module 171 is connected to a signal output end of the sampling component 180;

[0048] A first control module 172, wherein a first end of the first control module 172 is connected to a second end of the processing module 171;

[0049] The first level conversion module 173 has a first end connected to the second end of the first control module 172 , and a second end connected to the second switch device 150 .

[0050] In the embodiment of the present application, the control component 170 includes a processing module 171, a first control module 172 and a first level conversion module 173. The processing module 171 is connected to the signal output end of the sampling component 180. The processing module 171 can receive the first voltage value and the second voltage value collected by the sampling component 180, and the processing module 171 can process and calculate the first voltage value and the second voltage value. The control signal is transmitted to the second switch device 150 through the first control module 172 and the first level conversion module 173 to control the on-off state of the second switch device 150.

[0051] like Figure 7 As shown, specifically, in the stage from T0 to T1, the first voltage value is greater than the second voltage value, and the first voltage value increases with time. The processing module 171 outputs a disconnection signal to the first control module 172, and the first control module 172 outputs a disconnection drive signal to the first level conversion module 173 for level conversion. The first level conversion module 173 transmits the disconnection drive signal after the level conversion to the second switch device 150, drives the second switch device 150 to disconnect, and the filter energy storage component 130 is in a charging state. The electric signal output by the filter rectifier component 110 simultaneously charges the filter energy storage component 130 and supplies power to the subsequent functional component 120.

[0052] In the stage from T1 to T11, the first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is greater than or equal to the voltage threshold. The processing module 171 outputs a disconnection signal to the first control module 172, and the first control module 172 outputs a disconnection drive signal to the first level conversion module 173 for level conversion. The first level conversion module 173 transmits the disconnection drive signal after the level conversion to the second switching device 150, drives the second switching device 150 to disconnect, and the filtering energy storage component 130 does not discharge or charge, and the filtering and rectifying component 110 directly supplies power to the subsequent functional component 120.

[0053] In the stage from T11 to T12, the first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is less than the voltage threshold. The processing module 171 outputs a conduction signal to the first control module 172, and the first control module 172 outputs a conduction drive signal to the first level conversion module 173 for level conversion. The first level conversion module 173 transmits the conduction drive signal after the level conversion to the second switching device 150, drives the second switching device 150 to turn on, and the filtering energy storage component 130 is in a discharging state. The filtering energy storage component 130 discharges to power the subsequent functional component 120.

[0054] In the embodiment of the present application, by setting a processing module 171, a first control module 172 and a first level conversion module 173 in the control component 170, the processing module 171 and the first control module 172 can output corresponding control signals according to the first voltage value and the second voltage value, and the first level conversion module 173 can also perform level conversion on the control signal, and connect the control end of the second switching device 150 to the first level conversion module 173, so that the first control module 172 can control the on-off state of the second switching device 150 according to the first voltage value and the second voltage value, thereby flexibly controlling whether the filter energy storage component 130 is in a charging state, further extending the time for the filter rectifier component 110 to directly supply power to the subsequent functional component 120, and improving the energy efficiency of the power supply circuit 100.

[0055] like Figure 1 and Figure 2 As shown, in some embodiments of the present application, the control component 170 also includes: a second control module 174, a first end of the second control module 174 is connected to the third end of the processing module 171; a second level conversion module 175, a first end of the second level conversion module 175 is connected to the second end of the second control module 174, and a second end of the second level conversion module 175 is connected to the first switching device 140.

[0056] In the embodiment of the present application, the control component 170 includes a processing module 171, a second control module 174 and a second level conversion module 175. The processing module 171 is connected to the signal output end of the sampling component 180. The processing module 171 can receive the first voltage value and the second voltage value collected by the sampling component 180, and the processing module 171 can process and calculate the first voltage value and the second voltage value. The control signal is transmitted to the first switch device 140 through the second control module 174 and the second level conversion module 175 to control the on-off state of the first switch device 140.

[0057] like Figure 7As shown, specifically, in the stage from T0 to T1, the first voltage value is greater than the second voltage value, and the first voltage value increases with time. The processing module 171 outputs a disconnection signal to the first control module 172, the first control module 172 outputs a disconnection drive signal to the first level conversion module 173 for level conversion, the first level conversion module 173 transmits the disconnection drive signal after the level conversion to the second switch device 150, drives the second switch device 150 to disconnect, the processing module 171 outputs a conduction signal to the second control module 174, the second control module 174 outputs a conduction drive signal to the second level conversion module 175 for level conversion, the second level conversion module 175 transmits the conduction drive signal after the level conversion to the first switch device 140, drives the first switch device 140 to conduct, the filter energy storage component 130 is in a charging state, and the electric signal output by the filter rectifier component 110 simultaneously charges the filter energy storage component 130 and supplies power to the subsequent functional component 120.

[0058] In the stage from T1 to T11, the first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is greater than or equal to the voltage threshold. The processing module 171 outputs a disconnection signal to the first control module 172, and the first control module 172 outputs a disconnection drive signal to the first level conversion module 173 for level conversion. The first level conversion module 173 transmits the disconnection drive signal after the level conversion to the second switch device 150, and drives the second switch device 150 to disconnect. The processing module 171 outputs a disconnection signal to the second control module 174, and the second control module 174 outputs a disconnection drive signal to the second level conversion module 175 and reverse level conversion. The second level conversion module 175 transmits the disconnection drive signal after the level conversion to the first switch device 140, and drives the first switch device 140 to disconnect. The filter energy storage component 130 does not discharge or charge, and the filter rectifier component 110 directly supplies power to the subsequent functional component 120.

[0059] In the stage from T11 to T12, the first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is less than the voltage threshold. The processing module 171 outputs a conduction signal to the first control module 172, and the first control module 172 outputs a conduction drive signal to the first level conversion module 173 for level conversion. The first level conversion module 173 transmits the conduction drive signal after the level conversion to the second switch device 150, and drives the second switch device 150 to turn on. The processing module 171 outputs a disconnection signal to the second control module 174, and the second control module 174 outputs a disconnection drive signal to the second level conversion module 175 and reverse level conversion. The second level conversion module 175 transmits the disconnection drive signal after the level conversion to the first switch device 140, and drives the first switch device 140 to disconnect. The filter energy storage component 130 is in a discharging state, and the filter energy storage component 130 discharges to power the subsequent functional component 120.

[0060] In the embodiment of the present application, by setting a processing module 171, a second control module 174 and a second level conversion module 175 in the control component 170, the processing module 171 and the second control module 174 can output corresponding control signals according to the first voltage value and the second voltage value, and the second level conversion module 175 can also perform level conversion on the control signal, so as to accurately control the on-off state of the first switching device 140, so that the control component 170 can control the on-off state of the first switching device 140.

[0061] like Figure 2 As shown, in some embodiments of the present application, the power supply circuit 100 further includes: a diode 152 , a first end of the diode 152 is connected to the filter rectifier component 110 , and a second end of the diode 152 is connected to the filter energy storage component 130 .

[0062] In the embodiment of the present application, the diode 152 is arranged between the filter rectifier component 110 and the filter energy storage component 130, and the electric signal output by the filter rectifier component 110 is transmitted to the filter energy storage component 130 through the diode 152, so that the filter energy storage component 130 stores the electric energy output by the filter rectifier component 110. The diode 152 is unidirectionally conducted from the positive electrode to the negative electrode, which prevents the electric signal of the filter energy storage component 130 from flowing back to the filter rectifier component 110, thereby improving the operation stability of the power supply circuit 100, and the control component 170 only needs to control the first switch device 140, thereby reducing the hardware cost of the control component 170.

[0063] like Figure 1 , Figure 2 and Figure 4As shown, in some embodiments of the present application, the power supply circuit 100 further includes: a unidirectional conduction device 162, a first end of the unidirectional conduction device 162 is connected to the filter rectifier component 110, a second end of the unidirectional conduction component is connected to the subsequent functional component 120, and the unidirectional conduction device 162 is unidirectionally conducted from the first end to the second end;

[0064] Or the power supply circuit 100 also includes: a third switch device 164, a first end of the third switch device 164 is connected to the filter rectifier component 110, a second end of the third switch device 164 is connected to the subsequent functional component 120, and a control end of the third switch device 164 is connected to the control component 170.

[0065] In the embodiment of the present application, a unidirectional conduction device 162 is arranged between the filter rectifier component 110 and the subsequent functional component 120, so that the filter rectifier component 110 is unidirectionally conducted to the subsequent functional component 120. When the filter rectifier component 110 supplies power to the subsequent functional component 120, the electrical signal output by the filter rectifier component 110 can be transmitted to the subsequent functional component 120 through the unidirectional conduction device 162. When the filter energy storage component 130 supplies power to the subsequent functional component 120, the electrical signal output by the filter energy storage component 130 cannot be transmitted to the filter rectifier component 110 through the unidirectional conduction device 162, thereby improving the stability of the operation of the power supply circuit 100.

[0066] In an embodiment of the present application, a third switch device 164 is provided between the filter rectifier component 110 and the subsequent functional component 120, and the on-off state of the third switch device 164 can be controlled by the control component 170. When the filter rectifier component 110 supplies power to the subsequent functional component 120, the control component 170 controls the third switch device 164 to be turned on, and the electrical signal output by the filter rectifier component 110 can be transmitted to the subsequent functional component 120 through the third switch device 164. When the filter energy storage component 130 supplies power to the subsequent functional component 120, the control component 170 controls the third switch device 164 to be turned off, and the electrical signal output by the filter energy storage component 130 cannot be transmitted to the filter rectifier component 110 through the third switch device 164, thereby improving the stability of the operation of the power supply circuit 100.

[0067] like Figure 3 As shown, the control end of the third switch device 164 is connected to the control component 170, and the control component 170 controls the on-off state of the third switch device 164. Specifically, when the first voltage value is less than the second voltage value, the third switch device 164 is controlled to be turned off, and the first switch device 140 is controlled to be turned on. At this time, the subsequent functional component 120 is powered only by the electrical signal output by the filtering energy storage component 130.

[0068] like Figure 4As shown, the unidirectional conductive device 162 may be a diode, the anode of the diode is the first end of the unidirectional conductive device 162, and the cathode of the diode is the second end of the unidirectional conductive device 162. The first end of the unidirectional conductive device 162 is connected to the filter rectifier assembly 110, and the second end of the unidirectional conductive device 162 is connected to the filter energy storage assembly 130, and the unidirectional conductive device 162 is unidirectionally conductive from the first end to the second end.

[0069] In an embodiment of the present application, a unidirectional conduction device 162 is provided between the filter rectifier component 110 and the subsequent functional component 120, so that the filter rectifier component 110 is unidirectionally conducted to the subsequent functional component 120, or a third switching device 164 controlled by the control component 170 is provided between the filter rectifier component 110 and the subsequent functional component 120, so as to avoid the current impact on the filter rectifier component 110 when the filter energy storage component 130 supplies power to the subsequent functional component 120, thereby further improving the operating stability and safety of the power supply circuit 100.

[0070] In some embodiments of the present application, the sampling component 180 includes: a voltage comparison module 186, a first end of the voltage comparison module 186 is connected to the control component 170, and the voltage comparison module 186 is the signal output end of the sampling component 180; a first detection module 182, a first end of the first detection module 182 is connected to the output end of the filter rectifier component 110, a second end of the first detection module 182 is connected to the second end of the voltage comparison module 186, and the first end of the first detection module 182 is the first sampling end of the sampling component 180; a second detection module 184, a first end of the second detection module 184 is connected to the first end of the filter energy storage component 130, a second end of the second detection module 184 is connected to the second end of the voltage comparison module 186, and the first end of the second detection module 184 is the second sampling end of the sampling component 180.

[0071] In the embodiment of the present application, the first end of the first detection module 182 is a sampling end, and the first end of the first detection module 182 is connected to the output end of the filter and rectifier component 110, and is used to detect the first voltage value output by the filter and rectifier component 110. The second end of the first detection module 182 is an output end, and the second end of the first detection module 182 is connected to the voltage comparison module 186. The first end of the second detection module 184 is a sampling end, and the first end of the second detection module 184 is connected to the filter energy storage component 130, and is used to detect the second voltage value in the filter energy storage component 130. The second end of the second detection module 184 is an output end, and the second end of the second detection module 184 is connected to the voltage comparison module 186. After receiving the first voltage value and the second voltage value, the voltage comparison module 186 can compare the first voltage value and the second voltage value, and transmit the comparison result to the control component 170, so that the control component 170 can control the on-off state of the first switch device 140 and the second switch device 150 according to the comparison result of the first voltage value and the second voltage value.

[0072] In the embodiment of the present application, a voltage comparison module 186, a first detection module 182 and a second detection module 184 are set in the sampling component 180. The first detection module 182 collects the first voltage value output by the filter and rectifier component 110, and the second detection module 184 collects the second voltage value in the filter energy storage component 130. The voltage comparison module 186 compares the numerical relationship between the first voltage value and the second voltage value, and transmits the comparison result to the control component 170, thereby improving the accuracy and timeliness of the control component 170 over the first switch device 140 and the second switch device 150.

[0073] In some embodiments of the present application, a charging device is provided. Figure 8 A schematic block diagram of a charging device provided in some embodiments of the present application is shown. Figure 8 As shown, the charging device 800 includes: a power supply circuit 100, which is the power supply circuit in any of the above implementations, and thus has all the beneficial technical effects of the power supply circuit 100 in any of the above embodiments, which will not be described in detail here.

[0074] Exemplarily, the charging device further includes a shell, and the power supply circuit is arranged in the shell.

[0075] In some embodiments of the present application, a charging method is provided, which is applied to the charging device in any of the above embodiments. Fig. 9 A flowchart of a charging method provided in some embodiments of the present application is shown. Fig. 9 As shown, the charging method includes:

[0076] Step 902, obtaining a first voltage value and a second voltage value collected by a sampling component;

[0077] In the embodiment of the present application, the sampling component includes a first sampling terminal and a second sampling terminal, the first sampling terminal is connected to the output terminal of the filter and rectifier component, the first sampling terminal can collect the first voltage value of the electrical signal output by the filter and rectifier component, the second sampling terminal is connected to the filter energy storage component, and the second sampling terminal can collect the second voltage value in the filter energy storage component. The control component is connected to the sampling component, the control component can receive the first voltage value and the second voltage value collected by the sampling component, and control the on-off state of the first switching device according to the first voltage value and the second voltage value, thereby controlling the charge and discharge state of the filter energy storage component.

[0078] Step 904: Control the on-off state of the first switch device according to the first voltage value and the second voltage value.

[0079] In the embodiment of the present application, a first switching device is provided between the filter energy storage component and the subsequent functional component, and a sampling component capable of collecting the first voltage value of the output electrical signal of the filter rectifier component and the second voltage value in the filter energy storage component is provided, as well as a control component for controlling the on-off state of the first switching device, so that the control component can control the on-off state of the first switching device according to the first voltage value and the second voltage value, thereby reducing the time for the filter energy storage component to supply power to the subsequent functional component, making the filter rectifier component supply power to the subsequent functional component for a longer time, reducing the time for the capacitor in the filter energy storage component to affect the current distortion, making the power supply harmonic current better, and shortening the discharge time of the filter energy storage component, which can greatly reduce the energy storage parameter requirements of the filter energy storage component, thereby reducing the volume and cost of the filter energy storage component, and solving the problem of excessive volume of the charging device due to the large volume of the filter energy storage component.

[0080] In some embodiments of the present application, controlling the on-off state of the first switching device according to the first voltage value and the second voltage value includes: controlling the first switching device to be off when the first voltage value is greater than the second voltage value; controlling the first switching device to be on when the sampling component detects that the first voltage value is less than the second voltage value and the first voltage value is less than a voltage threshold; controlling the first switching device to be off when the first voltage value is less than the second voltage value and the first voltage value is greater than or equal to the voltage threshold.

[0081] In the embodiment of the present application, the first voltage value increases with time, and the first voltage value is greater than the second voltage value, the first switch device is controlled to be disconnected, the filter energy storage component is in a charging state, and the electrical signal output by the filter rectifier component simultaneously charges the filter energy storage component and supplies power to the subsequent functional components. The first voltage value decreases with time, the first voltage value is less than the second voltage value, the first voltage value is greater than or equal to the voltage threshold, the first switch device is controlled to be disconnected, the filter energy storage component does not discharge and charge, and the filter rectifier component directly supplies power to the subsequent functional components. The first voltage value decreases with time, the first voltage value is less than the second voltage value, the first voltage value is less than the voltage threshold, the first switch device is controlled to be turned on, the filter energy storage component is in a discharging state, and the filter energy storage component discharges to supply power to the subsequent functional components.

[0082] Exemplarily, the voltage threshold can be set according to actual needs, and the value range of the voltage threshold is from the minimum operating voltage of the subsequent functional components to the grid operating voltage.

[0083] In an embodiment of the present application, the on-off state of the first switching device is controlled according to the first voltage value and the second voltage value, so as to flexibly control whether the filter energy storage component is in a discharge state, thereby extending the time for the filter rectifier component to directly supply power to the subsequent functional components, and improving the energy efficiency of the power supply circuit.

[0084] In some embodiments of the present application, the power supply circuit also includes: a second switching device, a first end of the second switching device is connected to the filter rectifier component, and a second end of the second switching device is connected to the filter energy storage component, and the charging method also includes: when the first voltage value is greater than the second voltage value, controlling the second switching device to turn on; when the sampling component detects that the first voltage value is less than the second voltage value, and the first voltage value is less than the voltage threshold, controlling the second switching device to turn off; when the first voltage value is less than the second voltage value, and the first voltage value is greater than the voltage threshold, controlling the second switching device to turn off.

[0085] In the embodiment of the present application, the first voltage value increases with time, and the first voltage value is greater than the second voltage value, the first switch device is controlled to be disconnected, and the second switch device is controlled to be turned on, the filter energy storage component is in a charging state, and the electrical signal output by the filter rectifier component simultaneously charges the filter energy storage component and supplies power to the subsequent functional components. The first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is greater than or equal to the voltage threshold. The first switch device and the second switch device are controlled to be in a disconnected state, the filter energy storage component does not discharge and charge, and the filter rectifier component directly supplies power to the subsequent functional components. The first voltage value decreases with time, the first voltage value is less than the second voltage value, and the first voltage value is less than the voltage threshold. The first switch device is controlled to be turned on, and the second switch device is disconnected, the filter energy storage component is in a discharging state, and the filter energy storage component discharges to supply power to the subsequent functional components.

[0086] In an embodiment of the present application, the on-off state of the second switching device is controlled according to the first voltage value and the second voltage value, so as to flexibly control whether the filter energy storage component is in a charging state, further extending the time for the filter rectifier component to directly supply power to the subsequent functional components, and improving the energy efficiency of the power supply circuit.

[0087] The power supply method provided in the embodiment of the present application can be executed by a charging device. In the embodiment of the present application, the charging device is used as an example to illustrate the power supply circuit provided in the embodiment of the present application.

[0088] In some embodiments of the present application, a charging device is provided, which is applied to the charging device in any of the above embodiments. Fig.10 Schematic block diagram of a charging device provided in some embodiments of the present application is shown. Fig.10 As shown, the charging device 1000 includes:

[0089] An acquisition module 1002 is used to acquire a first voltage value and a second voltage value collected by a sampling component;

[0090] The control module 1004 is used to control the on-off state of the first switch device according to the first voltage value and the second voltage value.

[0091] In the embodiment of the present application, a first switching device is provided between the filter energy storage component and the subsequent functional component, and a sampling component capable of collecting the first voltage value of the output electrical signal of the filter rectifier component and the second voltage value in the filter energy storage component is provided, as well as a control component for controlling the on-off state of the first switching device, so that the control component can control the on-off state of the first switching device according to the first voltage value and the second voltage value, thereby reducing the time for the filter energy storage component to supply power to the subsequent functional component, making the filter rectifier component supply power to the subsequent functional component for a longer time, reducing the time for the capacitor in the filter energy storage component to affect the current distortion, making the power supply harmonic current better, and shortening the discharge time of the filter energy storage component, which can greatly reduce the energy storage parameter requirements of the filter energy storage component, thereby reducing the volume and cost of the filter energy storage component, and solving the problem of excessive volume of the charging device due to the large volume of the filter energy storage component.

[0092] In some embodiments of the present application, the control module 1004 is used to control the first switch device to be disconnected when the first voltage value is greater than the second voltage value;

[0093] The control module 1004 is used to control the first switch device to turn on when the sampling component detects that the first voltage value is less than the second voltage value and the first voltage value is less than the voltage threshold;

[0094] The control module 1004 is used to control the first switch device to be disconnected when the first voltage value is less than the second voltage value and the first voltage value is greater than or equal to the voltage threshold.

[0095] In an embodiment of the present application, the on-off state of the first switching device is controlled according to the first voltage value and the second voltage value, so as to flexibly control whether the filter energy storage component is in a discharge state, thereby extending the time for the filter rectifier component to directly supply power to the subsequent functional components, and improving the energy efficiency of the power supply circuit.

[0096] In some embodiments of the present application, the power supply circuit further includes: a second switch device, a first end of the second switch device is connected to the filter rectifier component, and a second end of the second switch device is connected to the filter energy storage component;

[0097] A control module 1004, configured to control the second switch device to turn on when the first voltage value is greater than the second voltage value;

[0098] The control module 1004 is used to control the second switch device to be disconnected when the sampling component detects that the first voltage value is less than the second voltage value and the first voltage value is less than the voltage threshold;

[0099] The control module 1004 is used to control the second switch device to be disconnected when the first voltage value is less than the second voltage value and the first voltage value is greater than the voltage threshold.

[0100] In an embodiment of the present application, the on-off state of the second switching device is controlled according to the first voltage value and the second voltage value, so as to flexibly control whether the filter energy storage component is in a charging state, further extending the time for the filter rectifier component to directly supply power to the subsequent functional components, and improving the energy efficiency of the power supply circuit.

[0101] The charging device in the embodiment of the present application can be an electronic device, or a component in the electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA), etc. It can also be a server, a network attached storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), a teller machine or a self-service machine, etc., and the embodiment of the present application is not specifically limited.

[0102] The charging device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system, an iOS operating system, or other possible operating systems, which are not specifically limited in the embodiment of the present application.

[0103] The charging device provided in the embodiment of the present application can implement each process implemented in the above method embodiment, and will not be described again here to avoid repetition.

[0104] Optionally, an embodiment of the present application further provides an electronic device, which includes a charging device as in any of the above embodiments, and thus has all the beneficial effects of the charging device in any of the embodiments, which will not be elaborated herein.

[0105] Optionally, an embodiment of the present application further provides an electronic device, Fig.11 A structural block diagram of an electronic device according to an embodiment of the present application is shown. Fig.11As shown, the electronic device 1100 includes a processor 1102, a memory 1104, and a program or instruction stored in the memory 1104 and executable on the processor 1102. When the program or instruction is executed by the processor 1102, each process of the above-mentioned charging method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0106] It should be noted that the electronic devices in the embodiments of the present application include the above-mentioned mobile electronic devices and non-mobile electronic devices.

[0107] Fig.12 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of the present application.

[0108] The electronic device 1200 includes but is not limited to: a radio frequency unit 1201, a network module 1202, an audio output unit 1203, an input unit 1204, a sensor 1205, a display unit 1206, a user input unit 1207, an interface unit 1208, a memory 1209, a processor 1210 and other components.

[0109] Those skilled in the art will appreciate that the electronic device 1200 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 1210 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.12 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0110] The processor 1210 is used to obtain the first voltage value and the second voltage value collected by the sampling component;

[0111] The processor 1210 is used to control the on-off state of the first switching device according to the first voltage value and the second voltage value.

[0112] In the embodiment of the present application, a first switching device is provided between the filter energy storage component and the subsequent functional component, and a sampling component capable of collecting the first voltage value of the output electrical signal of the filter rectifier component and the second voltage value in the filter energy storage component is provided, as well as a control component for controlling the on-off state of the first switching device, so that the control component can control the on-off state of the first switching device according to the first voltage value and the second voltage value, thereby reducing the time for the filter energy storage component to supply power to the subsequent functional component, making the filter rectifier component supply power to the subsequent functional component for a longer time, reducing the time for the capacitor in the filter energy storage component to affect the current distortion, making the power supply harmonic current better, and shortening the discharge time of the filter energy storage component, which can greatly reduce the energy storage parameter requirements of the filter energy storage component, thereby reducing the volume and cost of the filter energy storage component, and solving the problem of excessive volume of the charging device due to the large volume of the filter energy storage component.

[0113] Further, the processor 1210 is used to control the first switch device to be disconnected when the first voltage value is greater than the second voltage value;

[0114] The processor 1210 is configured to control the first switch device to turn on when the sampling component detects that the first voltage value is less than the second voltage value and the first voltage value is less than the voltage threshold;

[0115] The processor 1210 is configured to control the first switch device to be disconnected when the first voltage value is less than the second voltage value and the first voltage value is greater than or equal to a voltage threshold.

[0116] In an embodiment of the present application, the on-off state of the first switching device is controlled according to the first voltage value and the second voltage value, so as to flexibly control whether the filter energy storage component is in a discharge state, thereby extending the time for the filter rectifier component to directly supply power to the subsequent functional components, and improving the energy efficiency of the power supply circuit.

[0117] Furthermore, the power supply circuit further comprises: a second switch device, a first end of the second switch device is connected to the filter rectifier component, and a second end of the second switch device is connected to the filter energy storage component;

[0118] The processor 1210 is configured to control the second switch device to be turned on when the first voltage value is greater than the second voltage value;

[0119] The processor 1210 is configured to control the second switch device to be disconnected when the sampling component detects that the first voltage value is less than the second voltage value and the first voltage value is less than the voltage threshold;

[0120] Processor 1210, configured to control the second switch device to disconnect when the first voltage value is less than the second voltage value and the first voltage value is greater than the voltage threshold

[0121] In an embodiment of the present application, the on-off state of the second switching device is controlled according to the first voltage value and the second voltage value, so as to flexibly control whether the filter energy storage component is in a charging state, further extending the time for the filter rectifier component to directly supply power to the subsequent functional components, and improving the energy efficiency of the power supply circuit.

[0122] It should be understood that in the embodiment of the present application, the input unit 1204 may include a graphics processor (Graphics Processing Unit, GPU) 12041 and a microphone 12042, and the graphics processor 12041 processes the image data of the static picture or action file obtained by the image capture device (such as a camera) in the action file capture mode or the image capture mode. The display unit 1206 may include a display panel 12061, and the display panel 12061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1207 includes a touch panel 12071 and at least one of other input devices 12072. The touch panel 12071 is also called a touch screen. The touch panel 12071 may include two parts: a touch detection device and a touch controller. Other input devices 12072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0123] The memory 1209 can be used to store software programs and various data. The memory 1209 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 1209 may include a volatile memory or a non-volatile memory, or the memory 1209 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 1209 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0124] The processor 1210 may include one or more processing units; optionally, the processor 1210 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 1210.

[0125] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0126] The processor is the processor in the electronic device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0127] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned power supply circuit embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0128] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0129] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the power supply circuit embodiment described above, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0130] It should be noted that, in this article, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, device, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, device, article or device. In the absence of further restrictions, an element defined by the statement "includes one..." does not exclude the presence of other identical elements in the process, device, article or device including the element. In addition, it should be noted that the scope of the devices and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described device may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0131] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment device can be implemented by means of software plus a necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, disk, CD), including a number of instructions for a terminal (which can be a mobile phone, computer, server, or network equipment, etc.) to execute the device of each embodiment of the present application.

[0132] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A power supply circuit, characterized in that: include: Filtering and rectifying components; A post-stage functional component connected to the filtering and rectifying component; A filter energy storage component, wherein a first end of the filter energy storage component is connected to the filter rectifier component; A first switch device, wherein a first end of the first switch device is connected to a second end of the filtering energy storage component, and a second end of the first switch device is connected to the subsequent functional component; A sampling component, wherein a first sampling end of the sampling component is connected to the output end of the filtering and rectifying component, a second sampling end of the sampling component is connected to the filtering and energy storage component, the first sampling end is used to collect a first voltage value, and the second sampling end is used to collect a second voltage value; A control component is connected to the signal output end of the sampling component, the control component is connected to the control end of the first switching device, and the control component is used to control the on-off state of the first switching device according to the first voltage value and the second voltage value.

2. The power supply circuit according to claim 1, characterized in that: Also includes: A second switch device, wherein a first end of the second switch device is connected to the filter rectifier component, and a second end of the second switch device is connected to the filter energy storage component.

3. The power supply circuit according to claim 2, characterized in that: The control component comprises: A processing module, a first end of the processing module is connected to the signal output end of the sampling component; A first control module, wherein a first end of the first control module is connected to a second end of the processing module; A first level conversion module, wherein a first end of the first level conversion module is connected to a second end of the first control module, and a second end of the first level conversion module is connected to a control end of the second switch device.

4. The power supply circuit according to claim 3, characterized in that: The control component also includes: a second control module, wherein a first end of the second control module is connected to a third end of the processing module; A second level conversion module, wherein a first end of the second level conversion module is connected to a second end of the second control module, and a second end of the second level conversion module is connected to the first switch device.

5. The power supply circuit according to claim 2, characterized in that: The second switching device comprises: A diode, wherein the positive electrode of the diode is connected to the filtering and rectifying component, and the negative electrode of the diode is connected to the filtering and energy storage component.

6. The power supply circuit according to any one of claims 1 to 5, characterized in that: Also includes: A unidirectional conductive device, wherein a first end of the unidirectional conductive device is connected to the filter and rectifier component, a second end of the unidirectional conductive device is connected to the subsequent functional component, and the unidirectional conductive device is unidirectionally conductive from the first end to the second end; or A third switch device, wherein a first end of the third switch device is connected to the filter and rectifier component, a second end of the third switch device is connected to the post-stage functional component, and a control end of the third switch device is connected to the control component.

7. The power supply circuit according to any one of claims 1 to 5, characterized in that: The sampling assembly comprises: A voltage comparison module, wherein a first end of the voltage comparison module is connected to the control component, and the voltage comparison module is a signal output end of the sampling component; A first detection module, wherein a first end of the first detection module is connected to an output end of the filter and rectifier component, a second end of the first detection module is connected to a second end of the voltage comparison module, and a first end of the first detection module is a first sampling end of the sampling component; A second detection module, wherein the first end of the second detection module is connected to the first end of the filtering energy storage component, the second end of the second detection module is connected to the second end of the voltage comparison module, and the first end of the second detection module is the second sampling end of the sampling component.

8. A charging device, characterized in that: include: The power supply circuit according to any one of claims 1 to 7.

9. A charging method, characterized in that: Applied to the charging device according to claim 8, the charging method comprises: Acquire a first voltage value and a second voltage value collected by the sampling component; The on-off state of the first switching device is controlled according to the first voltage value and the second voltage value.

10. The charging method according to claim 9, characterized in that: The controlling the on-off state of the first switching device according to the first voltage value and the second voltage value comprises: When the first voltage value is greater than the second voltage value, controlling the first switch device to be disconnected; When the sampling component detects that the first voltage value is less than the second voltage value, and the first voltage value is less than a voltage threshold, controlling the first switch device to turn on; When the first voltage value is less than the second voltage value and the first voltage value is greater than or equal to the voltage threshold, the first switching device is controlled to be turned off.

11. The charging method according to claim 10, characterized in that: The power supply circuit further includes: a second switch device, a first end of the second switch device is connected to the filter rectifier component, and a second end of the second switch device is connected to the filter energy storage component. The charging method further includes: When the first voltage value is greater than the second voltage value, controlling the second switch device to be turned on; When the sampling component detects that the first voltage value is less than the second voltage value, and the first voltage value is less than the voltage threshold, controlling the second switch device to be disconnected; When the first voltage value is smaller than the second voltage value and the first voltage value is larger than the voltage threshold, the second switch device is controlled to be turned off.

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