Power supply control circuit and power equipment

Abstract

The utility model relates to a power supply control circuit and power equipment, and the power supply control circuit generates a power-on driving signal through a power-on trigger module according to the switching operation of a power-on switch, and drives a switch module to connect a power supply to a load for supplying power to the load. After the load is powered on, power supply control of the load is controlled by the load through the power supply control circuit, for example, when operation needs to be kept, a keeping signal can be output to the keeping and power-off module, and the keeping and power-off module outputs a power-on driving signal according to the keeping signal to enable the switch module to be kept on; in addition, output of the holding signal can be stopped when power-off is needed, so that the holding and power-off module stops outputting the power-on driving signal to turn off the switch module, active control over power-on and power-off of the load is achieved, and the endurance of the power supply is prolonged.

Description

Technical Field

[0001] The present application belongs to the field of power electronics technology, and in particular relates to a power supply control circuit and power equipment. Background Art

[0002] The internal circuitry of an electric-start generator is typically powered by a starting battery. Due to space constraints and limited battery capacity, the battery constantly drains as long as the main control system is operating, easily leading to a dead battery. Once the battery is depleted, the generator will not start, impacting the user experience. Utility Model Content

[0003] The purpose of this application is to provide a power supply control circuit and power equipment, aiming to solve the problem in related technologies that after the equipment system is working, the starting battery is continuously consumed and the power is easily exhausted.

[0004] In a first aspect, an embodiment of the present application provides a power supply control circuit, including:

[0005] A switch module, wherein an input end of the switch module is connected to a power source via a power-on switch, and an output end of the switch module is used to connect to a load;

[0006] a power-on trigger module, wherein a detection terminal of the power-on trigger module is connected to an input terminal of the switch module, an output terminal of the power-on trigger module is connected to a control terminal of the switch module, and the power-on trigger module is configured to generate a power-on drive signal when the power-on switch is operated, and the power-on drive signal is configured to drive the switch module to conduct;

[0007] A holding and power-off module, wherein the input end of the holding and power-off module is used to receive a holding signal, the output end of the holding and power-off module is connected to the control end of the switch module, and the holding and power-off module is used to:

[0008] When the hold signal is received, the power-on drive signal is output to the control end of the switch module, or when the hold signal is not received, the power-on drive signal is stopped from being output to the control end of the switch module, so that the switch module remains disconnected.

[0009] In one embodiment, the power-on trigger module includes a DC-DC unit, a bias unit, and a switch unit;

[0010] The first end of the resistance-DC-pass-alternation unit constitutes the detection end of the power-on trigger module and is connected to the input end of the switch module. The resistance-DC-pass-alternation unit is used to output an electrical signal at the second end when the power-on switch is operated to cause a current change;

[0011] The first end of the bias unit is connected to the second end of the DC / DC unit, the second end of the bias unit is grounded, and the bias unit is used to generate a conduction signal based on the electrical signal;

[0012] The control end of the switch unit is connected to the first end of the bias unit, the first end of the switch unit is connected to the control end of the switch module, the second end of the switch unit is grounded, and the switch unit is used to be turned on under the drive of the conduction signal to generate the power-on drive signal.

[0013] In one embodiment, the DC-DC unit includes a first capacitor, a first end of the first capacitor is connected to the input end of the switch module, and a second end of the first capacitor is connected to the first end of the bias unit.

[0014] In one embodiment, the bias unit includes a first resistor, a first end of the first resistor constitutes a first end of the bias unit, and a second end of the first resistor constitutes a second end of the bias unit.

[0015] In one embodiment, the bias unit further includes a second capacitor, and the second capacitor is connected in parallel with the first resistor.

[0016] In one embodiment, the switch unit includes a first switch tube, the control end of the first switch tube constitutes the control end of the switch unit, the first conduction end of the first switch tube constitutes the first end of the switch unit, and the second conduction end of the first switch tube constitutes the second end of the switch unit.

[0017] In one embodiment, the holding and power-off module includes a second switch tube, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a third capacitor;

[0018] The first end of the second resistor is used to receive the holding signal, the second end of the second resistor is connected to the first end of the third capacitor, the first end of the third resistor, and the second conductive end of the second switch tube, the second end of the third resistor and the second end of the third capacitor are grounded; the first conductive end of the second switch tube is connected to the control end of the switch module;

[0019] The fourth resistor is connected between the control terminal and the second conduction terminal of the second switch tube, the first terminal of the fifth resistor is connected to the first power supply terminal, and the second terminal of the fifth resistor is connected to the control terminal of the second switch tube.

[0020] In one embodiment, a key switch module is further included, wherein a first end of the key switch module is connected to the control end of the switch module, and a second end is grounded; the key switch module is operable to connect the first end and the second end, and disconnect the first end and the second end when no operation is performed.

[0021] In one embodiment, the switch module includes a third switch tube, a sixth resistor, a seventh resistor and a fourth capacitor;

[0022] The first conductive end of the third switching tube constitutes the input end of the switching module, and the second conductive end constitutes the output end of the switching module. The sixth resistor is connected between the first conductive end and the control end of the third switching tube, and the fourth capacitor is connected in parallel with the sixth resistor; the first end of the seventh resistor is connected to the control end of the third switching tube, and the second end of the seventh resistor constitutes the control end of the switching module.

[0023] In a second aspect, an embodiment of the present application provides an electric power device, including the power supply control circuit as described above.

[0024] Compared with the related art, the embodiments of the present application have the following beneficial effects:

[0025] The power supply control circuit provided in the embodiment of the present application is used for power-on control of the load. The power-on trigger module generates a power-on drive signal according to the switching operation of the power-on switch, and drives the switch module to connect the power to the load to supply power to the load. After the load is powered on, the power supply control of the load is handed over to the load through the power supply control circuit. For example, when it is necessary to maintain operation, the hold signal can be output to the hold and power-off module. The hold and power-off module outputs a power-on drive signal according to the hold signal to keep the switch module turned on. It can also stop outputting the hold signal when it is necessary to power off, so that the hold and power-off module stops outputting the power-on drive signal to turn off the switch module, thereby realizing active control of the load's power on and power off, thereby extending the power supply life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a power supply control circuit provided in one embodiment of the present application;

[0027] Figure 2 An example schematic diagram of a power supply control circuit provided in one embodiment of the present application;

[0028] Figure 3 This is an example schematic diagram of a power supply control circuit provided in one embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0030] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0032] like Figure 1 As shown, the present application provides a power supply control circuit 100 that can be applied to a fuel cell generator with a starting battery, which may include a built-in or external power conversion device. For example, the starting battery is used to provide operating voltage to various modules / devices of the fuel cell generator. For example, it primarily provides operating voltage to the power conversion device, including but not limited to powering the control chip and driver chip within the power conversion device.

[0033] In one embodiment of the present application, the power supply control circuit 100 includes a switch module 110 , a power-on trigger module 120 , and a hold and power-off module 130 .

[0034] The input of the switch module 110 is connected to the power supply 200 via the power-on switch SW1, and the output of the switch module 110 is connected to the load 300. The detection terminal of the power-on trigger module 120 is connected to the input of the switch module 110, and the output of the power-on trigger module 120 is connected to the control terminal of the switch module 110. The power-on trigger module 120 is configured to generate a power-on drive signal when the power-on switch SW1 is operated. The power-on drive signal is used to drive the switch module 110 to conduct. The input of the hold and power-off module 130 is configured to receive a hold signal, and the output of the hold and power-off module 130 is connected to the control terminal of the switch module 110. The hold and power-off module 130 is configured to output the power-on drive signal to the control terminal of the switch module 110 upon receiving the hold signal, or to stop outputting the power-on drive signal to the control terminal of the switch module 110 upon not receiving the hold signal, thereby keeping the switch module 110 off.

[0035] In an application, the power source 200 may be, for example, a starting battery or an external power source for a fuel generator. The load 300 may be, for example, various working modules / devices within the fuel generator, such as a power conversion device built into or external to the fuel generator. For example, the present application is described using the power supply control circuit 100 for controlling power supply to a power conversion device, that is, the load 300 is described as a power conversion device. The power-on switch SW1 and the switch module 110 are connected in series between the power source 200 and the load 300. When both are connected simultaneously, the power conversion device is powered on, and when both are disconnected simultaneously, the power conversion device is powered off.

[0036] The power-on trigger module 120 is specifically configured to detect whether the power-on switch SW1 is turned on / off. At the moment the power-on switch SW1 is turned on, the power-on trigger module 120 generates a power-on drive signal based on the current / voltage changes at the input of the switch module 110. It is understood that at the moment the power-on switch SW1 is turned off, although the current / voltage at the input of the switch module 110 changes, no current is input to the input of the switch module 110 at this time. Regardless of whether the switch module 110 is closed or not, the power supply 200 cannot provide power to the load 300. Therefore, whether the power-on trigger module 120 generates a power-on drive signal at this time has no effect on the power supply to the load 300.

[0037] In applications, the hold signal can be provided by the control chip of the power conversion device after power is turned on. Therefore, after the power-on drive signal drives the switch module 110 to conduct, the hold and power-off module 130 maintains the power-on drive signal to the switch module 110 according to the hold signal to maintain the power supply of the power conversion device. For example, for a fuel generator, the starting battery usually needs to retain a certain amount of power in preparation for the user to start power generation in an emergency. Therefore, when the power conversion device detects that the power level of the power supply 200, such as the starting battery, is lower than a certain value, and confirms to cut off the power to maintain the power level of the starting battery, it can stop outputting the hold signal, thereby canceling the power-on drive signal, causing the switch module 110 to turn off, realizing the control of stopping the discharge of the starting battery, and saving the power of the starting battery for use when it is needed next time.

[0038] It is understandable that stopping outputting the holding signal may directly shut down the power conversion device, or may simply shut down the discharge of the starting battery, while the power conversion device can continue to supply power using the fuel generator's own power generation.

[0039] Exemplarily, the power switch SW1 is a rotary switch for controlling the input of the power source 200 such as a power conversion device and / or a fuel generator.

[0040] Please also see Figure 2In some embodiments, the switch module 110 includes a third switch transistor Q3, a sixth resistor R6, a seventh resistor R7, and a fourth capacitor C4. The first conductive end of the third switch transistor Q3 constitutes the input end of the switch module 110, and the second conductive end constitutes the output end of the switch module 110. The sixth resistor R6 is connected between the first conductive end and the control end of the third switch transistor Q3. The fourth capacitor C4 is connected in parallel with the sixth resistor R6. The first end of the seventh resistor R7 is connected to the control end of the third switch transistor Q3, and the second end of the seventh resistor R7 constitutes the control end of the switch module 110.

[0041] The first switch transistor can be, for example, a P-channel MOS transistor. The source of the MOS transistor serves as the first conduction terminal of the third switch transistor Q3, the drain of the MOS transistor serves as the second conduction terminal of the third switch transistor Q3, and the gate serves as the control terminal of the third switch transistor Q3. The sixth resistor R6 is a bias resistor, configured to provide a reverse bias to the gate of the MOS transistor based on the source voltage of the MOS transistor, thereby turning the MOS transistor off by default. Therefore, in this embodiment, the power-on drive signal provided by the power-on trigger module 120 is a low-level signal, thereby causing the gate of the MOS transistor to change from a reverse bias to a forward bias, thereby turning it on.

[0042] Please continue reading Figure 2 In some embodiments, the power-on trigger module 120 includes a DC / DC switching unit 121 , a bias unit 122 , and a switch unit 123 .

[0043] The first end of the DC-to-I / O unit 121 constitutes the detection end of the power-on trigger module 120 and is connected to the input end of the switch module 110. The DC-to-I / O unit 121 is configured to output an electrical signal at its second end when the power-on switch SW1 is operated, causing a current change. It is understood that when the power-on switch SW1 is operated, causing a current change, the first end of the DC-to-I / O unit 121 receives an AC signal, causing the DC-to-I / O unit 121 to exhibit a short circuit or low impedance. Consequently, the second end of the DC-to-I / O unit 121 generates an electrical signal.

[0044] Please continue to refer to Figure 2 , the first end of the bias unit 122 is connected to the second end of the DC / DC unit 121, the second end of the bias unit 122 is grounded, and the bias unit 122 is used to generate a conduction signal based on the electrical signal. The conduction signal is, for example, a bias voltage. The control end of the switch unit 123 is connected to the first end of the bias unit 122, the first end of the switch unit 123 is connected to the control end of the switch module 110, the second end of the switch unit 123 is grounded, and the switch unit 123 is used to be turned on under the drive of the conduction signal to generate a power-on drive signal. It can be understood that after the switch unit 123 is turned on, the control end of the switch module 110 is pulled down to the ground, that is, in this embodiment, the power-on drive signal is a low-level signal.

[0045] In the technical solution of this embodiment, by sensing the current change caused by the user's power-on operation on the power-on switch SW1, a power-on drive signal is generated to drive the switch module 110 to turn on, so that the load 300 is powered on. The circuit is simple and reliable.

[0046] Please continue to refer to Figure 2 In one embodiment, the DC-to-DC converter unit 121 includes a first capacitor C1. The first end of the first capacitor C1 constitutes the first end of the DC-to-DC converter unit 121 and is connected to the input end of the switch module 110. The second end of the first capacitor C1 constitutes the second end of the DC-to-DC converter unit 121 and is connected to the first end of the bias unit 122. In application, when the power-on switch SW1 is closed, the current / voltage at the input end of the switch module 110 changes from low to high, equivalent to the input of an AC signal. At this time, the first capacitor C1 is charged. The charging action of the first capacitor C1 generates an electrical signal at the second end, which is used to generate the power-on drive signal to drive the switch unit 123 to conduct. This is simple, reliable, and low-cost.

[0047] In one embodiment, the bias unit 122 includes a first resistor R1, wherein a first end of the first resistor R1 constitutes a first end of the bias unit 122, and a second end of the first resistor R1 constitutes a second end of the bias unit 122. The first resistor R1 divides the voltage of an electrical signal generated by charging the first capacitor C1 to generate a conduction signal, thereby driving the switch unit 123 to conduct.

[0048] In one embodiment, the bias unit 122 further includes a second capacitor C2 , and the second capacitor C2 is connected in parallel with the first resistor R1 .

[0049] In one embodiment, the switch unit 123 includes a first switch transistor Q1, wherein the control terminal of the first switch transistor Q1 constitutes the control terminal of the switch unit 123, the first conductive terminal of the first switch transistor Q1 constitutes the first terminal of the switch unit 123, and the second conductive terminal of the first switch transistor Q1 constitutes the second terminal of the switch unit 123. Exemplarily, the first switch transistor Q1 is an N-channel MOS transistor, wherein the drain of the N-channel MOS transistor serves as the first conductive terminal of the first switch transistor Q1, the source serves as the second conductive terminal of the first switch transistor Q1, and the gate serves as the control terminal of the first switch transistor Q1.

[0050] It is understood that when the power-on switch SW1 is turned on, the voltage at the input end of the switch module 110 increases from low to high, showing an AC signal. The first capacitor C1 and the second capacitor C2 show a certain impedance and enter a charging state. The first capacitor C1 and the second capacitor C2 generate a conduction signal (i.e., a conduction voltage) at the gate of the first switch tube Q1 based on the voltage divided by the power supply 200, turning on the first switch tube Q1. After the power-on switch SW1 is turned on, after the input at the input end of the switch module 110 stabilizes, the first capacitor C1 appears to be an open circuit. The second capacitor C2 can maintain the conduction voltage generated by the first capacitor C1 for a period of time to keep the first switch tube Q1 on. Afterwards, since the charge stored in the second capacitor C2 will be released, the presence of the first resistor R1 can adjust the time for the charge release. After the charge stored in the second capacitor C2 is released, the first switch tube Q1 returns to the off state.

[0051] In addition, in some embodiments, the second capacitor C2 may not be provided. At this time, when the power-on switch SW1 is turned on, the first capacitor C1 exhibits a certain impedance, and the impedance of the first capacitor C1 and the gate-to-ground impedance of the first switch tube Q1 form a voltage divider. The voltage based on the change of the input end of the switch module 110 generates a turn-on signal (i.e., a turn-on voltage) at the gate of the first switch tube Q1, and the first switch tube Q1 can still be turned on at the moment the power-on switch SW1 is turned on. In an embodiment without the second capacitor C2, the first resistor R1 is also not necessary. However, the first resistor R1 can limit the charging current of the first capacitor C1. Therefore, retaining the first resistor R1 can be used to debug the turn-on time of the first switch tube Q1 and debug the gate voltage of the first switch tube Q1.

[0052] Please continue to refer to Figure 2 In one embodiment, the holding and power-off module 130 includes a second switch tube Q2, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a third capacitor C3.

[0053] The first end of the second resistor R2 is used to receive a hold signal. The second end of the second resistor R2 is connected to the first end of the third capacitor C3, the first end of the third resistor R3, and the second conduction end of the second switch Q2. The second end of the third resistor R3 and the second end of the third capacitor C3 are grounded. The first conduction end of the second switch Q2 is connected to the control end of the switch module 110. The fourth resistor R4 is connected between the control end and the second conduction end of the second switch Q2. The first end of the fifth resistor R5 is connected to the first power supply terminal VCC, and the second end of the fifth resistor R5 is connected to the control end of the second switch Q2.

[0054] Exemplarily, the second switch tube Q2 can be, for example, an N-channel MOS tube, the drain of the N-channel MOS tube serves as the first conduction terminal of the second switch tube Q2, the source serves as the second conduction terminal of the second switch tube Q2, and the gate serves as the control terminal of the second switch tube Q2.

[0055] The on and off state of the second switch Q2 determines the on and off state of the third switch Q3, and thus determines whether the power supply 200 starts and stops supplying power to the load 300. After power is applied to the load 300, the control chip of the power supply control circuit 100 provides a hold signal (a low-level signal) to turn on the second switch Q2, maintain the conduction state of the third switch Q3, and maintain power to the load 300. The second switch Q2 is turned off by revoking the hold signal (i.e., pulling the low-level signal high). When the hold signal is revoked, the third switch Q3 is turned off, and the power supply 200 stops supplying power to the load 300. In this way, the load 300 can be self-powered off.

[0056] Setting the third resistor R3 and the fourth resistor R4 can be used to adjust the voltage between the gate and the source of the second switch tube Q2, so that the second switch tube Q2 can be smoothly turned on and off, and form overvoltage protection. When it is necessary to cut off the power to maintain the power of the starting battery, the output of the holding signal can be stopped to achieve self-power-off of the load 300, and the power of the starting battery can be saved for use when it is needed next time. Among them, the third capacitor C3 is used to maintain the source voltage of the second switch tube Q2 in the process of stopping the output of the holding signal, so as to avoid the pin providing the holding signal from being uncontrolled during the power-off process of the load 300 self-powering off, resulting in power-off failure. By changing the capacitance of the third capacitor C3, the source voltage maintenance time of the second switch tube Q2 during the power-off process of the load 300 self-powering off can be adjusted to make it maintain long enough to ensure successful power-off.

[0057] In one embodiment, please also refer to Figure 3 ,like Figure 3 As shown, the power supply control circuit 100 further includes a key switch module 140. A first terminal of the key switch module 140 is connected to the control terminal of the switch module 110, and a second terminal is grounded. The key switch module 140 is operable to connect the first terminal and the second terminal, and disconnect the first terminal and the second terminal when no operation is performed.

[0058] In this embodiment, the switch module 110 is driven to be turned on by a low level, and the operation key switch module 140 turns on the first end and the second end, that is, generates a low level signal as a power-on driving signal.

[0059] Exemplarily, the key switch module 140 includes a key switch SW2. In the above embodiment, after the hold signal is not received or the hold signal is stopped, the hold and power-off module 130 can operate to turn on the key switch SW2 to output a power-on drive signal to turn on the switch module 110, thereby re-energizing the load 300, such as the power control device. After being powered on, the power control device then outputs a hold signal to the hold and power-off module 130. The hold and power-off module 130 then outputs a power-on drive signal to the control terminal of the switch module 110, causing the switch module 110 to remain on and the power control module to maintain power.

[0060] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A power supply control circuit, characterized in that: include: A switch module, wherein an input end of the switch module is connected to a power source via a power-on switch, and an output end of the switch module is used to connect a load; A power-on trigger module, wherein the detection end of the power-on trigger module is connected to the input end of the switch module, the output end of the power-on trigger module is connected to the control end of the switch module, and the power-on trigger module is used to generate a power-on drive signal when the power-on switch is operated, and the power-on drive signal is used to drive the switch module to conduct; A holding and power-off module, wherein the input end of the holding and power-off module is used to receive a holding signal, the output end of the holding and power-off module is connected to the control end of the switch module, and the holding and power-off module is used to: When the hold signal is received, the power-on drive signal is output to the control end of the switch module, or when the hold signal is not received, the power-on drive signal is stopped from being output to the control end of the switch module, so that the switch module remains disconnected.

2. The power supply control circuit according to claim 1, characterized in that: The power-on trigger module includes a DC blocking and AC passing unit, a bias unit and a switch unit; The first end of the DC-blocking and DC-passing unit constitutes the detection end of the power-on trigger module and is connected to the input end of the switch module. The DC-blocking and DC-passing unit is used to output an electrical signal at the second end when the power-on switch is operated to cause a current change; The first end of the bias unit is connected to the second end of the DC / AC unit, the second end of the bias unit is grounded, and the bias unit is used to generate a conduction signal based on the electrical signal; The control end of the switch unit is connected to the first end of the bias unit, the first end of the switch unit is connected to the control end of the switch module, the second end of the switch unit is grounded, and the switch unit is used to be turned on under the drive of the conduction signal to generate the power-on drive signal.

3. The power supply control circuit according to claim 2, characterized in that: The DC / DC converter unit includes a first capacitor, a first end of the first capacitor is connected to the input end of the switch module, and a second end of the first capacitor is connected to the first end of the bias unit.

4. The power supply control circuit according to claim 2, characterized in that: The bias unit includes a first resistor, a first end of the first resistor constitutes a first end of the bias unit, and a second end of the first resistor constitutes a second end of the bias unit.

5. The power supply control circuit according to claim 4, characterized in that: The bias unit further includes a second capacitor connected in parallel with the first resistor.

6. The power supply control circuit according to claim 2, characterized in that: The switch unit includes a first switch tube, a control end of the first switch tube constitutes the control end of the switch unit, a first conduction end of the first switch tube constitutes the first end of the switch unit, and a second conduction end of the first switch tube constitutes the second end of the switch unit.

7. The power supply control circuit according to claim 1, characterized in that: The holding and power-off module includes a second switch tube, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a third capacitor; The first end of the second resistor is used to receive the holding signal, the second end of the second resistor is connected to the first end of the third capacitor, the first end of the third resistor and the second conductive end of the second switch tube, the second end of the third resistor and the second end of the third capacitor are grounded; the first conductive end of the second switch tube is connected to the control end of the switch module; The fourth resistor is connected between the control terminal and the second conduction terminal of the second switch tube, the first end of the fifth resistor is connected to the first power supply terminal, and the second end of the fifth resistor is connected to the control terminal of the second switch tube.

8. The power supply control circuit according to any one of claims 1 to 7, characterized in that: It also includes a key switch module, a first end of which is connected to the control end of the switch module, and a second end is grounded; the key switch module can be operated to connect the first end and the second end, and disconnect the first end and the second end when there is no operation.

9. The power supply control circuit according to any one of claims 1 to 7, characterized in that: The switch module includes a third switch tube, a sixth resistor, a seventh resistor and a fourth capacitor; The first conduction end of the third switch tube constitutes the input end of the switch module, and the second conduction end constitutes the output end of the switch module. The sixth resistor is connected between the first conduction end and the control end of the third switch tube, and the fourth capacitor is connected in parallel with the sixth resistor; the first end of the seventh resistor is connected to the control end of the third switch tube, and the second end of the seventh resistor constitutes the control end of the switch module.

10. An electric power device, characterized in that: The method comprises a power supply control circuit as claimed in any one of claims 1 to 9.

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