Power switch circuit, energy storage system and control method of energy storage system

Abstract

The invention discloses a power switch circuit, an energy storage system and a control method of the energy storage system, and belongs to the technical field of energy storage. The power switch circuit is connected with a first semiconductor switch of an auxiliary power supply and comprises a driving unit and a control unit, the driving unit is provided with a first voltage division circuit, a second voltage division circuit and a third voltage division circuit, one end of the third voltage division circuit is connected with the first semiconductor switch, and the other end of the third voltage division circuit is connected with the first voltage division circuit and the second voltage division circuit. When the auxiliary power supply is in a turn-on state, the control unit is used for controlling the second semiconductor switch to be turned off when it is determined that the detection interface level of the first voltage division circuit is smaller than a first level value and the duration is longer than the target duration. The driving voltage provided by the first voltage division circuit and the third voltage division circuit for the first semiconductor switch is gradually reduced to be smaller than the turn-on threshold value of the first semiconductor switch through the first energy storage device, so that the first semiconductor switch is turned off.

Description

Technical Field

[0001] The present application belongs to the field of energy storage technology, and in particular, relates to a power switch circuit, an energy storage system, and a control method for the energy storage system. Background Art

[0002] The energy storage system is a system that can store electrical energy. The energy storage system stores electrical energy when there is surplus electricity, and releases electrical energy when there is a peak in electricity demand or when there is a shortage of electricity. The energy storage system plays an important role in enhancing the stability of the power system. When the energy storage system is undergoing maintenance or repair or when there is a failure in the energy storage system, the energy storage system needs to be completely powered off. To restart the auxiliary source after the energy storage system is completely powered off, you need to long-press the corresponding mechanical button. The mechanical button has the risk of sticking and not rebounding, which will cause the auxiliary source to continue to consume power and increase the loss in standby conditions without external energy input. If you wait for a long time, the battery will be depleted, affecting the user experience. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a power switch circuit, an energy storage system and a control method of the energy storage system, which can turn off the auxiliary power supply when the mechanical switch is stuck, thereby avoiding continuous power consumption of the auxiliary power supply.

[0004] In a first aspect, the present application provides a power switch circuit, which is used to control the start and stop of an auxiliary power supply of an energy storage system, and the power switch circuit is connected to a first semiconductor switch of the auxiliary power supply, and the power switch circuit includes:

[0005] A driving unit, the driving unit comprising a first voltage-dividing circuit provided with a mechanical switch and a first energy storage device connected in series, and a second voltage-dividing circuit provided with a second semiconductor switch, the driving unit further comprising a third voltage-dividing circuit, one end of the third voltage-dividing circuit being connected to the first semiconductor switch, and the other end of the third voltage-dividing circuit being connected to the first voltage-dividing circuit and the second voltage-dividing circuit;

[0006] A control unit, the control unit having a detection interface and a control interface, the detection interface is connected to the first voltage divider circuit, the control interface is connected to the second semiconductor switch, and the control unit is connected to the auxiliary power supply;

[0007] Wherein, when the mechanical switch is switched to closed, the first voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch to stimulate the first semiconductor switch to be turned on, so as to turn on the auxiliary power supply, and the control unit is used to control the second semiconductor switch to be turned on when the auxiliary power supply is turned on, and the second voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch to keep the first semiconductor switch turned on;

[0008] When the auxiliary power supply is in the on state, the control unit is used to control the second semiconductor switch to be disconnected when it is determined that the detection interface level of the first voltage divider circuit is less than the first level value and the duration is greater than the target duration, and the driving voltage provided to the first semiconductor switch by the first voltage divider circuit and the third voltage divider circuit is gradually reduced to less than the turn-on threshold of the first semiconductor switch through the first energy storage device, so that the first semiconductor switch is disconnected.

[0009] According to the power switch circuit of the present application, a mechanical switch and a first energy storage device are arranged in the first voltage-dividing circuit of the driving unit, and a second semiconductor switch is arranged in the second voltage-dividing circuit of the driving unit. The second voltage-dividing circuit provides a driving voltage for maintaining the conduction of the first semiconductor switch of the auxiliary power supply. When the mechanical switch is stuck, the control unit can continuously detect through the detection interface that the detection interface level is less than the first level value, and the control interface controls the second semiconductor switch to be disconnected. The driving voltage of the first semiconductor switch is gradually reduced to less than the turn-on threshold through the first energy storage device. The first semiconductor switch is disconnected. When the mechanical switch is stuck, the auxiliary power supply can be turned off to avoid continuous power consumption of the auxiliary power supply.

[0010] According to one embodiment of the present application, the first energy storage device and the mechanical switch are connected in series to ground in sequence, and the driving unit also has an electric energy release circuit, a first end of the electric energy release circuit is connected to the first voltage divider circuit, and a second end of the electric energy release circuit is connected to the second voltage divider circuit, the first end is arranged between the first energy storage device and the mechanical switch, and the second end is arranged at the ground end of the second semiconductor switch.

[0011] According to an embodiment of the present application, the electric energy release circuit is provided with a first isolation component, the input end of the first isolation component is provided at the second end, and the output end of the first isolation component is provided at the first end.

[0012] According to an embodiment of the present application, the first voltage-dividing circuit further includes a first voltage-dividing resistor, and the first voltage-dividing resistor is connected in parallel with the first energy storage device.

[0013] According to an embodiment of the present application, the third voltage-dividing circuit is provided with a second voltage-dividing resistor and a third voltage-dividing resistor connected in series.

[0014] According to an embodiment of the present application, the second voltage-dividing resistor is connected in parallel with a second energy storage device.

[0015] According to an embodiment of the present application, the first voltage divider circuit is provided with a second isolation component, the input end of the second isolation component is connected to the first energy storage device, and the output end of the second isolation component is connected to the mechanical switch.

[0016] According to an embodiment of the present application, the second voltage-dividing circuit further includes a fourth voltage-dividing resistor, and the fourth voltage-dividing resistor is connected in series with the second semiconductor switch.

[0017] In a second aspect, the present application provides an energy storage system, the energy storage system comprising:

[0018] Auxiliary power supply;

[0019] According to the power switch circuit as described in the first aspect above, the power switch circuit is connected to the first semiconductor switch of the auxiliary power supply, and the power switch circuit is used to control the start and stop of the auxiliary power supply.

[0020] According to the energy storage system of the present application, a mechanical switch and a first energy storage device are arranged in the first voltage-dividing circuit of the driving unit, and a second semiconductor switch is arranged in the second voltage-dividing circuit of the driving unit. The second voltage-dividing circuit provides a driving voltage for maintaining the conduction of the first semiconductor switch of the auxiliary power supply. When the mechanical switch is stuck, the control unit can continuously detect through the detection interface that the detection interface level is less than the first level value, and the control interface controls the second semiconductor switch to be disconnected. The driving voltage of the first semiconductor switch is gradually reduced to less than the turn-on threshold through the first energy storage device. The first semiconductor switch is disconnected. When the mechanical switch is stuck, the auxiliary power supply can be turned off to avoid continuous power consumption of the auxiliary power supply.

[0021] In a third aspect, the present application provides a control method for an energy storage system, the method being applied to the energy storage system described in the second aspect above, the method comprising:

[0022] When the mechanical switch is switched to closed, the first voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch to stimulate the first semiconductor switch to turn on, so as to turn on the auxiliary power supply. When the auxiliary power supply is turned on, the control unit controls the second semiconductor switch to turn on, and the second voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch to keep the first semiconductor switch turned on.

[0023] When the auxiliary power supply is in the on state, the control unit controls the second semiconductor switch to be disconnected when it is determined that the detection interface level of the first voltage divider circuit is less than the first level value and the duration is greater than the target duration, and the driving voltage provided to the first semiconductor switch by the first voltage divider circuit and the third voltage divider circuit is gradually reduced to less than the turn-on threshold of the first semiconductor switch through the first energy storage device, so that the first semiconductor switch is disconnected.

[0024] According to the control method of the energy storage system of the present application, a mechanical switch and a first energy storage device are arranged in the first voltage-dividing circuit of the driving unit, and a second semiconductor switch is arranged in the second voltage-dividing circuit of the driving unit. The second voltage-dividing circuit provides a driving voltage for maintaining the conduction of the first semiconductor switch of the auxiliary power supply. When the mechanical switch is stuck, the control unit can continuously detect through the detection interface that the detection interface level is less than the first level value, and the control interface controls the second semiconductor switch to be disconnected. The driving voltage of the first semiconductor switch is gradually reduced to less than the turn-on threshold through the first energy storage device, and the first semiconductor switch is disconnected. When the mechanical switch is stuck, the auxiliary power supply can be turned off to avoid continuous power consumption of the auxiliary power supply.

[0025] In a fourth aspect, the present application provides a control method for an energy storage system, wherein the start and stop of an auxiliary power supply of the energy storage system is controlled by a power switch circuit, the power switch circuit is connected to a first semiconductor switch of the auxiliary power supply, the power switch circuit comprises a drive unit, the drive unit comprises a first voltage divider circuit provided with a mechanical switch and a first energy storage device connected in series, and a second voltage divider circuit provided with a second semiconductor switch, the drive unit further comprises a third voltage divider circuit, one end of the third voltage divider circuit is connected to the first semiconductor switch, and the other end of the third voltage divider circuit is connected to the first voltage divider circuit and the second voltage divider circuit; a control unit, the control unit comprises a detection interface and a control interface, the detection interface is connected to the first voltage divider circuit, the control interface is connected to the second semiconductor switch, and the control unit is connected to the auxiliary power supply; the first energy storage device and the mechanical switch are connected in series to ground in sequence, the drive unit further comprises an electric energy release circuit, the first end of the electric energy release circuit is connected to the first voltage divider circuit, the second end of the electric energy release circuit is connected to the second voltage divider circuit, the first end is arranged between the first energy storage device and the mechanical switch, and the second end is arranged at the ground end of the second semiconductor switch, the method comprises:

[0026] When the second semiconductor switch is turned on, the first energy storage device is quickly discharged through the electric energy release circuit.

[0027] According to the control method of the energy storage system of the present application, a mechanical switch and a first energy storage device are arranged in the first voltage-dividing circuit of the driving unit, and a second semiconductor switch is arranged in the second voltage-dividing circuit of the driving unit. The second voltage-dividing circuit provides a driving voltage for maintaining the conduction of the first semiconductor switch of the auxiliary power supply. When the mechanical switch is stuck, the control unit can continuously detect through the detection interface that the detection interface level is less than the first level value, and the control interface controls the second semiconductor switch to be disconnected. The driving voltage of the first semiconductor switch is gradually reduced to less than the turn-on threshold through the first energy storage device, and the first semiconductor switch is disconnected. When the mechanical switch is stuck, the auxiliary power supply can be turned off to avoid continuous power consumption of the auxiliary power supply.

[0028] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is one of the structural schematic diagrams of the power switch circuit provided in the embodiment of the present application;

[0031] Figure 2 This is the second structural schematic diagram of the power switch circuit provided in the embodiment of the present application;

[0032] Figure 3 It is one of the flow charts of the control method of the energy storage system provided in the embodiment of the present application;

[0033] Figure 4 This is a second flow chart of the control method of the energy storage system provided in the embodiment of the present application;

[0034] Figure 5 This is a third flow chart of the control method of the energy storage system provided in the embodiment of the present application;

[0035] Figure 6 This is a fourth flow chart of the control method of the energy storage system provided in the embodiment of the present application;

[0036] Figure 7 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0037] Reference numerals:

[0038] Power switch circuit 100, drive unit 110, first energy storage device 111, mechanical switch 112,

[0039] The second semiconductor switch 113, the control unit 120, the detection interface 121, the control interface 122,

[0040] A power supply battery 200 , a first semiconductor switch 300 , and an auxiliary power supply 400 . DETAILED DESCRIPTION

[0041] 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.

[0042] 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 data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, 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.

[0043] The power switch circuit 100, the energy storage system and the control method of the energy storage system provided in the embodiment of the present application are described in detail below through specific embodiments and their application scenarios in combination with the accompanying drawings.

[0044] The power switch circuit 100 of the embodiment of the present application is used to control the start and stop of the auxiliary power supply 400 of the energy storage system.

[0045] Among them, the energy storage system is a system that can store electrical energy. The energy storage system can store electrical energy when there is surplus electricity, and can release electrical energy when there is a peak in electricity demand or when there is a shortage of electricity.

[0046] The auxiliary power supply 400 is a power supply that provides auxiliary power support in the energy storage system. The auxiliary power supply 400 can be enabled when the energy storage system is powered off, etc., to ensure stable and reliable operation of the basic components of the energy storage system.

[0047] like Figure 1 As shown, the power switch circuit 100 is connected to the first semiconductor switch 300 of the auxiliary power supply 400. The first semiconductor switch 300 can control the start and stop of the auxiliary power supply 400. When the first semiconductor switch 300 is turned on, the auxiliary power supply 400 is turned on. When the first semiconductor switch 300 is turned off, the auxiliary power supply 400 is turned off.

[0048] like Figure 1 As shown, the power switch circuit 100 includes a driving unit 110 and a control unit 120 .

[0049] The driving unit 110 has a first voltage-dividing circuit having a mechanical switch 112 and a first energy storage device 111 connected in series, and a second voltage-dividing circuit having a second semiconductor switch 113. The driving unit 110 also has a third voltage-dividing circuit, one end of the third voltage-dividing circuit is connected to the first semiconductor switch 300, and the other end of the third voltage-dividing circuit is connected to the first voltage-dividing circuit and the second voltage-dividing circuit.

[0050] Among them, the driving unit 110 is used to control the conduction or disconnection of the first semiconductor switch 300, and the driving unit 110 includes a first voltage divider circuit, a second voltage divider circuit and a third voltage divider circuit. The first semiconductor switch 300 is connected to one end of the third voltage divider circuit, and the other end of the third voltage divider circuit is connected to the first voltage divider circuit and the second voltage divider circuit in parallel.

[0051] The driving unit 110 provides a driving voltage to the first semiconductor switch 300 through the first voltage dividing circuit and the third voltage dividing circuit, or the second voltage dividing circuit and the third voltage dividing circuit, so that the first semiconductor switch 300 is turned on.

[0052] In this embodiment, the first voltage divider circuit includes a mechanical switch 112 and a first energy storage device 111 , and the mechanical switch 112 and the first energy storage device 111 are connected in series.

[0053] Among them, the mechanical switch 112 is an electrical component that controls the on-off of the circuit through physical operations such as pressing. The physical operation performed on the mechanical switch 112 can trigger the mechanical contact points inside the mechanical switch 112 to close or open, thereby realizing the on-off control of the circuit.

[0054] It can be understood that the mechanical switch 112 is used to control the connection or disconnection of the first voltage divider circuit. When the mechanical switch 112 is closed, the first voltage divider circuit is in a connected state, and when the mechanical switch 112 is disconnected, the first voltage divider circuit is in a disconnected state.

[0055] In this embodiment, the first energy storage device 111 is a component that can store electrical energy in the first voltage divider circuit. The first energy storage device 111 can be a capacitor, an inductor, or the like.

[0056] In this embodiment, the second voltage-dividing circuit includes a second semiconductor switch 113, and the second semiconductor switch 113 is used to control the connection or disconnection of the second voltage-dividing circuit.

[0057] It can be understood that when the second semiconductor switch 113 is turned on, the second voltage-dividing circuit is in a connected state, and when the second semiconductor switch 113 is turned off, the second voltage-dividing circuit is in a disconnected state.

[0058] In this embodiment, the control unit 120 has a detection interface 121 and a control interface 122 , the detection interface 121 is connected to the first voltage divider circuit, the control interface 122 is connected to the second semiconductor switch 113 , and the control unit 120 is connected to the auxiliary power supply 400 .

[0059] The detection interface 121 and the control interface 122 are communicatively connected, the control unit 120 may be a single-chip microcomputer, and the detection interface 121 and the control interface 122 may be two different ports in the same single-chip microcomputer.

[0060] The detection interface 121 can detect the circuit state of the first voltage divider circuit, and the control interface 122 can control the second semiconductor switch 113 to be turned on or off according to the detection result of the detection interface 121 or according to the power supply state of the control unit 120 .

[0061] In this embodiment, the control unit 120 is connected to an auxiliary power supply 400 , and the auxiliary power supply 400 can supply power to the control unit 120 .

[0062] In this embodiment, when the mechanical switch 112 is switched to closed, the first voltage divider circuit and the third voltage divider circuit provide a driving voltage to the first semiconductor switch 300 to stimulate the first semiconductor switch 300 to conduct, so as to start the auxiliary power supply 400 .

[0063] The mechanical switch 112 switches from open to closed, the first voltage-dividing circuit switches to a connected state, the third voltage-dividing circuit and the first voltage-dividing circuit form a path, the power supply battery 200 of the power switch circuit 100 outputs current that flows through the third voltage-dividing circuit and the first voltage-dividing circuit, and the voltages on the first voltage-dividing circuit and the third voltage-dividing circuit gradually increase, providing a driving voltage for the first semiconductor switch 300. After the driving voltage reaches the turn-on threshold of the first semiconductor switch 300, the first semiconductor switch 300 is turned on, and the auxiliary power supply 400 is turned on.

[0064] In this embodiment, the control unit 120 is used to control the second semiconductor switch 113 to turn on when the auxiliary power supply 400 is turned on, and the second voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch 300 to keep the first semiconductor switch 300 turned on.

[0065] In actual implementation, after the auxiliary power supply 400 is turned on, the control unit 120 establishes power supply and completes initialization operations such as parameter setting. After the control unit 120 is initialized, the second semiconductor switch 113 can be controlled to turn on through the control interface 122.

[0066] After the second semiconductor switch 113 is turned on, the second voltage divider circuit switches to a connected state, and the third voltage divider circuit and the second voltage divider circuit form a path. The output current of the power supply battery 200 of the power switch circuit 100 can flow through the third voltage divider circuit and the second voltage divider circuit. The third voltage divider circuit and the second voltage divider circuit provide a stable driving voltage for the first semiconductor switch 300 to keep the first semiconductor switch 300 turned on.

[0067] In this embodiment, when the auxiliary power supply 400 is in the on state, the control unit 120 is used to control the second semiconductor switch 113 to be disconnected when it is determined that the detection interface level of the first voltage divider circuit is less than the first level value and the duration is greater than the target duration. The driving voltage provided by the first voltage divider circuit and the third voltage divider circuit to the first semiconductor switch 300 is gradually reduced to less than the turn-on threshold of the first semiconductor switch 300 through the first energy storage device 111, so that the first semiconductor switch 300 is disconnected.

[0068] Among them, the detection interface level is the level value corresponding to the first voltage divider circuit detected by the detection interface 121, the first level value is a preset value, when the mechanical switch 112 is closed and the first voltage divider circuit is in a connected state, the detection interface level is less than the first level value.

[0069] In this embodiment, the target duration is a preset duration. When the detection interface level is less than the first level value and the duration is greater than the target duration, it can be determined that the mechanical switch 112 is stuck and the first voltage divider circuit is continuously in a connected state.

[0070] When it is determined that the mechanical switch 112 is stuck, the control unit 120 sends a control signal to the second semiconductor switch 113 through the control interface 122 to control the second semiconductor switch 113 to be disconnected, so that the second voltage divider circuit switches to the disconnected state, and the second voltage divider circuit no longer provides a driving voltage for the first semiconductor switch 300.

[0071] In this embodiment, when the mechanical switch 112 is stuck, after the second voltage-dividing circuit is switched to the disconnected state, the first voltage-dividing circuit and the third voltage-dividing circuit continue to provide the driving voltage for the first semiconductor switch 300 .

[0072] The first voltage-dividing circuit is continuously in the connected state, and the electric energy of the first voltage-dividing circuit is gradually stored in the first energy storage device 111 , so that the driving voltage provided by the first voltage-dividing circuit is gradually reduced.

[0073] It can be understood that when the driving voltage provided by the first voltage divider circuit and the third voltage divider circuit for the first semiconductor switch 300 is reduced to less than the turn-on threshold of the first semiconductor switch 300, the first semiconductor switch 300 is disconnected, so that the auxiliary power supply 400 is turned off, wherein the turn-on threshold is the minimum value of the driving voltage that turns on the first semiconductor switch 300.

[0074] According to the power switch circuit 100 provided in the embodiment of the present application, a mechanical switch 112 and a first energy storage device 111 are arranged in the first voltage-dividing circuit of the driving unit 110, and a second semiconductor switch 113 is arranged in the second voltage-dividing circuit of the driving unit 110. The second voltage-dividing circuit provides a driving voltage for maintaining the first semiconductor switch 300 of the auxiliary power supply 400 to be turned on. When the mechanical switch 112 is stuck, the control unit 120 can continuously detect through the detection interface 121 that the detection interface level is less than the first level value, and the control interface 122 controls the second semiconductor switch 113 to be disconnected. The driving voltage of the first semiconductor switch 300 is gradually reduced to less than the turn-on threshold through the first energy storage device 111, and the first semiconductor switch 300 is disconnected. When the mechanical switch 112 is stuck, the auxiliary power supply 400 can be turned off to avoid continuous power consumption of the auxiliary power supply 400.

[0075] In some embodiments, the first energy storage device 111 and the mechanical switch 112 are connected in series and grounded in sequence, and the driving unit 110 also has an energy release circuit, the first end of the energy release circuit is connected to the first voltage divider circuit, and the second end of the energy release circuit is connected to the second voltage divider circuit, the first end is arranged between the first energy storage device 111 and the mechanical switch 112, and the second end is arranged at the ground end of the second semiconductor switch 113.

[0076] The electric energy release circuit is used to release the electric energy stored in the first energy storage device 111 .

[0077] In this embodiment, the first energy storage device 111 is connected to the third voltage divider circuit, the first energy storage device 111 and the mechanical switch 112 are connected in series to ground in sequence, the first end of the electric energy release circuit is arranged between the first energy storage device 111 and the mechanical switch 112, and the second end of the electric energy release circuit is arranged at the ground end of the second semiconductor switch 113.

[0078] It should be noted that the first end of the electric energy release circuit may be an output end, and the second end of the electric energy release circuit may be an input end.

[0079] In this embodiment, the first energy storage device 111, the second semiconductor switch 113 and the energy release circuit form an energy release loop. After the second semiconductor switch 113 is turned on, the energy release loop forms a path, and the energy stored in the first energy storage device 111 can be quickly released through the energy release loop.

[0080] In this embodiment, when the auxiliary power supply 400 is working normally, the mechanical switch 112 is closed, the detection interface 121 can detect that the detection interface level of the first voltage divider circuit is less than the first level value, and the control interface 122 sends a control signal to control the second semiconductor switch 113 to be disconnected. The mechanical switch 112 is disconnected immediately after being closed, and no driving voltage is provided to the first semiconductor switch 300. The first semiconductor switch 300 is disconnected, and the auxiliary power supply 400 is turned off.

[0081] After the auxiliary power supply 400 is turned off, when the mechanical switch 112 is closed again, the electric energy stored in the first energy storage device 111 has been released through the electric energy release circuit, and the voltage of the first energy storage device 111 is close to 0V. The power supply battery 200 of the power switch circuit 100 is connected to the ground through the third voltage divider circuit and the first voltage divider circuit, and the driving voltage of the first semiconductor switch 300 can be quickly established, and the auxiliary power supply 400 starts working immediately.

[0082] In this embodiment, the electricity stored in the first energy storage device 111 can be released through the second semiconductor switch 113 and the energy release circuit when the second semiconductor switch 113 is turned on. After the auxiliary power supply 400 is turned off, the auxiliary power supply 400 is restarted without waiting for the first energy storage device 111 to discharge, and the auxiliary power supply 400 can be started quickly.

[0083] In some embodiments, the electric energy release circuit is provided with a first isolation component, the input end of the first isolation component is provided at the second end, and the output end of the first isolation component is provided at the first end.

[0084] The first isolation component is a component that can control the direction of current flow in the circuit. For example, the first isolation component can be a diode.

[0085] In this embodiment, the electric energy release circuit is provided with a first isolation component, which can ensure that the current is input from the second end and output from the first end, thereby ensuring that the electric energy stored in the first energy storage device 111 is released through the electric energy release circuit.

[0086] In some embodiments, the first voltage-dividing circuit further includes a first voltage-dividing resistor, and the first voltage-dividing resistor is connected in parallel with the first energy storage device 111 .

[0087] In this embodiment, the first voltage-dividing resistor is connected in parallel with the first energy storage device 111 , and the first voltage-dividing resistor is used to provide voltage division of the driving voltage of the first semiconductor switch 300 when the first voltage-dividing circuit is in a connected state.

[0088] In this embodiment, after the first voltage-dividing circuit is in the connected state, the first voltage-dividing resistor and the voltage-dividing element in the third voltage-dividing circuit jointly provide a driving voltage for the first semiconductor switch 300 .

[0089] It should be noted that the first voltage dividing circuit may include other voltage dividing elements.

[0090] In some embodiments, the third voltage-dividing circuit includes a second voltage-dividing resistor and a third voltage-dividing resistor connected in series.

[0091] In this embodiment, the second voltage-dividing resistor and the third voltage-dividing resistor are used to provide voltage division of the driving voltage of the first semiconductor switch 300 .

[0092] In this embodiment, the second voltage-dividing resistor and the third voltage-dividing resistor can jointly provide a driving voltage for the first semiconductor switch 300 with the voltage-dividing element in the first voltage-dividing circuit, and the second voltage-dividing resistor and the third voltage-dividing resistor can also jointly provide a driving voltage for the first semiconductor switch 300 with the voltage-dividing element in the second voltage-dividing circuit.

[0093] It should be noted that the third voltage-dividing circuit may include other voltage-dividing elements.

[0094] In some embodiments, the second voltage-dividing resistor is connected in parallel with a second energy storage device.

[0095] In this embodiment, the second voltage-dividing resistor and the third voltage-dividing resistor are connected in series in sequence, the third voltage-dividing resistor is connected to the first voltage-dividing circuit and the second voltage-dividing circuit, and the second voltage-dividing resistor is connected in parallel to the second energy storage device.

[0096] The second energy storage device is a device that can adjust the speed of voltage change in the circuit. For example, the second energy storage device can be a capacitor, an inductor, etc.

[0097] In this embodiment, the second energy storage device can stabilize the driving voltage of the first semiconductor switch 300 to ensure that the first semiconductor switch 300 is stably turned on, thereby reducing the impact current when the auxiliary power supply 400 is turned on.

[0098] In some embodiments, the first voltage divider circuit is provided with a second isolation component, the input end of the second isolation component is connected to the first energy storage device 111 , and the output end of the second isolation component is connected to the mechanical switch 112 .

[0099] In this embodiment, the first energy storage device 111 , the second isolation component and the mechanical switch 112 are connected in series and grounded in sequence.

[0100] The second isolation component is a component that can control the direction of current flow in the circuit. For example, the second isolation component can be a diode.

[0101] In this embodiment, the first voltage-dividing circuit is provided with a second isolation component, which can ensure that the current flow path in the first voltage-dividing circuit is unidirectional and ensure that the switching action of the mechanical switch 112 does not affect the first energy storage device 111 .

[0102] In some embodiments, the second voltage-dividing circuit further includes a fourth voltage-dividing resistor, and the fourth voltage-dividing resistor is connected in series with the second semiconductor switch 113 .

[0103] In this embodiment, the fourth voltage-dividing resistor and the second semiconductor switch 113 are connected in series to ground in sequence, and the fourth voltage-dividing resistor is used to provide voltage division of the driving voltage of the first semiconductor switch 300 when the second voltage-dividing circuit is in a connected state.

[0104] In this embodiment, after the second voltage-dividing circuit is in the connected state, the fourth voltage-dividing resistor and the voltage-dividing element in the third voltage-dividing circuit jointly provide a driving voltage for the first semiconductor switch 300 .

[0105] It should be noted that the second voltage-dividing circuit may include other voltage-dividing elements.

[0106] A specific embodiment of the power switch circuit 100 is introduced below.

[0107] like Figure 2 As shown, the entire circuit includes a driving unit 110, a detection unit, a control unit and an auxiliary power supply 400, wherein the detection unit is the detection interface 121 of the control unit 120, the control unit is the control interface 122 of the above-mentioned control unit 120, and the driving unit 110 and the control unit 120 are units in the power switch circuit 100.

[0108] The driving unit 110 includes a first voltage dividing circuit, a second voltage dividing circuit and a third voltage dividing circuit, and one end of the third voltage dividing circuit is connected to the first voltage dividing circuit and the second voltage dividing circuit.

[0109] The third voltage-dividing circuit includes a second voltage-dividing resistor R1 and a third voltage-dividing resistor R2, and the second voltage-dividing resistor R1 is connected in parallel with a second energy storage device, namely, a capacitor C1.

[0110] The first voltage divider circuit includes an energy storage device, namely a first energy storage device 111 , a mechanical switch 112 SW1 , a first voltage divider resistor R5 , and a second isolation component, namely a diode D2 .

[0111] The second voltage-dividing circuit includes a fourth voltage-dividing resistor R3 and a second semiconductor switch 113Q2 . The second semiconductor switch 113Q2 may be an NPN transistor.

[0112] In this embodiment, the power supply battery 200BAT is connected to the input end of the diode D1, the output end of D1 is connected to one end of R1 and C1 in parallel, the other end of R1 and C1 in parallel is connected to R2, and R2 is connected to the second voltage divider circuit and the first voltage divider circuit.

[0113] In the first voltage divider circuit, the first energy storage device 111 and R5 connected in parallel are connected to the input end of D2, the output end of D2 is connected to SW1, and SW1 is grounded. In the second voltage divider circuit, R3 and Q2 are connected in series and then grounded.

[0114] The input end of the first isolation component, ie, the diode D3, is connected to the ground end of Q2, and the output end of D3 is connected between the first energy storage device 111 and D2.

[0115] The third voltage divider circuit is connected to the first semiconductor switch 300Q1, Q1 is connected to the auxiliary power supply 400, wherein Q1 is a P-type metal-oxide-semiconductor field effect transistor (PMOS).

[0116] In this embodiment, the control unit 120 is a single chip microcomputer, the MCU1_GPIO1 port of the single chip microcomputer, namely the detection interface 121, samples the key voltage of SW1, and the MCU1_GPIO2 port of the single chip microcomputer, namely the control interface 122, sends control instructions.

[0117] The MCU1_GPIO1 port of the microcontroller is connected between D2 and SW1 through a diode D4, and the MCU1_GPIO2 port of the microcontroller is connected to Q2 through a resistor R4.

[0118] In this embodiment, the resistance values ​​of R1, R2, R3 and R5 satisfy:

[0119]

[0120] Among them, V BAT_min The minimum output voltage of the battery 200BAT, V BAT_max The maximum output voltage of the battery 200BAT, V th_Q1 is the turn-on threshold of Q1.

[0121] When the first energy storage device 111 is a capacitor C2, the time from when SW1 is pressed to when the microcontroller sends a GPIO2 signal is T, where the time can be obtained by timer detection, and the first energy storage device 111, R1, R2, R3 and R5 satisfy:

[0122]

[0123] in,

[0124]

[0125] The following introduces Figure 2 Several working scenarios of the power switch circuit 100 are shown.

[0126] Scenario 1: The power switch circuit 100 operates normally.

[0127] In the initial state, the voltage of the first energy storage device 111 is 0V. When the mechanical switch 112SW1 is pressed, the power supply battery 200BAT forms a path to the ground through R1 / C1, R2, R5 / first energy storage device 111, D2, SW1, and the driving voltage required by Q1 is gradually formed on R1.

[0128] The presence of C1 slows down the turning-on speed of Q1, which can reduce the impact current of the auxiliary power supply 400 when Q1 is turned on. The capacity of the first energy storage device 111 is relatively large, and the voltage across the first energy storage device 111 is relatively small in the initial stage, which does not affect the conduction of Q1.

[0129] After Q1 is turned on, the power supply battery 200BAT supplies power to the auxiliary power supply 400, and the auxiliary power supply 400 starts working. The power supply of the single-chip microcomputer is established. After the initialization is completed, the single-chip microcomputer sends a high-level instruction through GPIO2 to turn on Q2. At this time, SW1 can be disconnected, and the driving voltage of Q1 is redistributed by the voltage division of R1, R2, and R3 to ensure that Q1 is continuously turned on. At the same time, the energy on the first energy storage device 111 is quickly released through R3, Q2, and D3 to prepare for the next SW1 button to start up.

[0130] Scenario 2: the SW1 button in the power switch circuit 100 is stuck.

[0131] When SW1 is stuck, a continuous low level is detected through the microcontroller GPIO1, the microcontroller GPIO2 sends a low level signal, Q2 is turned off, and the power supply battery 200BAT continues to charge the first energy storage device 111 through R1, R2, D2, and SW1. The driving voltage of Q1 eventually reaches the divided voltage of R1, R2, and R5 (the divided voltage value is less than the conduction threshold of Q1, i.e., the turn-on threshold), Q1 is turned off, and the auxiliary power supply 400 is disconnected.

[0132] Case 3: Switch SW1 repeatedly to quickly turn on and off the auxiliary power supply 400.

[0133] When the auxiliary power supply 400 works normally, press SW1, the microcontroller GPIO1 detects a low level, the microcontroller GPIO2 sends a low level signal, Q2 is turned off, and SW1 is released immediately after being pressed, the driving power supply of Q1 is disconnected immediately, and the auxiliary power supply 400 is quickly shut down.

[0134] After the auxiliary power supply 400 is turned off, SW1 is quickly pressed again, the energy in the first energy storage device 111 has been released, the voltage of the first energy storage device 111 is close to 0V, and a path is formed between the power supply battery 200BAT and the ground through R1 / C1, R2, R5 / first energy storage device 111, D2, and SW1. The driving voltage of Q1 is quickly established, and the auxiliary power supply 400 starts working immediately.

[0135] The embodiment of the present application also provides an energy storage system.

[0136] The energy storage system includes an auxiliary power supply 400 and the above-mentioned power switch circuit 100 . The power switch circuit 100 is connected to the first semiconductor switch 300 of the auxiliary power supply 400 . The power switch circuit 100 is used to control the start and stop of the auxiliary power supply 400 .

[0137] According to the energy storage system provided in the embodiment of the present application, a mechanical switch 112 and a first energy storage device 111 are provided in the first voltage-dividing circuit of the driving unit 110, and a second semiconductor switch 113 is provided in the second voltage-dividing circuit of the driving unit 110. The second voltage-dividing circuit provides a driving voltage for maintaining the first semiconductor switch 300 of the auxiliary power supply 400 to be turned on. When the mechanical switch 112 is stuck, the control unit 120 can continuously detect through the detection interface 121 that the detection interface level is less than the first level value, and the control interface 122 controls the second semiconductor switch 113 to be disconnected. The driving voltage of the first semiconductor switch 300 is gradually reduced to less than the turn-on threshold through the first energy storage device 111, and the first semiconductor switch 300 is disconnected. When the mechanical switch 112 is stuck, the auxiliary power supply 400 can be turned off to avoid continuous power consumption of the auxiliary power supply 400.

[0138] An embodiment of the present application further provides a control method for an energy storage system, and the control method for an energy storage system is applied to the above-mentioned energy storage system.

[0139] The control method of the energy storage system provided in the embodiment of the present application can be executed by an electronic device or a functional module or functional entity in the electronic device that can implement the control method of the energy storage system. The control method of the energy storage system provided in the embodiment of the present application is described below using the electronic device as an example of the execution subject.

[0140] like Figure 3 As shown, the control method of the energy storage system includes: step 310 and step 320.

[0141] Step 310, when the mechanical switch 112 is switched to closed, the first voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch 300, stimulating the first semiconductor switch 300 to turn on, so as to turn on the auxiliary power supply 400. When the auxiliary power supply 400 is turned on, the control unit 120 controls the second semiconductor switch 113 to turn on, and the second voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch 300 to keep the first semiconductor switch 300 turned on.

[0142] Step 320, when the auxiliary power supply 400 is in the on state, the control unit 120 controls the second semiconductor switch 113 to be disconnected when it is determined that the detection interface level of the first voltage divider circuit is less than the first level value and the duration is greater than the target duration, and the driving voltage provided by the first voltage divider circuit and the third voltage divider circuit to the first semiconductor switch 300 is gradually reduced to less than the turn-on threshold of the first semiconductor switch 300 through the first energy storage device 111, so that the first semiconductor switch 300 is disconnected.

[0143] According to the control method of the energy storage system provided in the embodiment of the present application, a mechanical switch 112 and a first energy storage device 111 are set in the first voltage-dividing circuit of the driving unit 110, and a second semiconductor switch 113 is set in the second voltage-dividing circuit of the driving unit 110. The second voltage-dividing circuit provides a driving voltage for maintaining the first semiconductor switch 300 of the auxiliary power supply 400 to be turned on. When the mechanical switch 112 is stuck, the control unit 120 can continuously detect through the detection interface 121 that the detection interface level is less than the first level value, and the control interface 122 controls the second semiconductor switch 113 to be disconnected. The driving voltage of the first semiconductor switch 300 is gradually reduced to less than the turn-on threshold through the first energy storage device 111, and the first semiconductor switch 300 is disconnected. When the mechanical switch 112 is stuck, the auxiliary power supply 400 can be turned off to avoid continuous power consumption of the auxiliary power supply 400.

[0144] A specific embodiment of a control method for an energy storage system is introduced below.

[0145] like Figure 4 As shown, the corresponding Figure 2 A control method for the energy storage system of the power switch circuit 100 is shown.

[0146] Step 1: Press button SW1.

[0147] Step 2: The power supply battery 200BAT charges the first energy storage device 111 from zero, and the first voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch 300Q1 to stimulate the first semiconductor switch 300Q1 to turn on, so as to turn on the auxiliary power supply 400, and the auxiliary power supply 400 starts to work.

[0148] Step 3, after the auxiliary power supply 400 is powered, the single chip starts to work, the single chip GPIO2 sends a high level lock signal, Q2 is turned on, the first energy storage device 111 discharges through R3, and at the same time, the GPIO1 level is detected, that is, the single chip GPIO1 samples the key voltage of SW1.

[0149] Step 4: Determine whether the detection interface level detected by GPIO1 is less than the first level value and the duration is greater than the target duration, that is, determine whether the detection interface level detected by GPIO1 is continuously at a low level, wherein the target duration is 30s.

[0150] Step 5: When the detection interface level detected by GPIO1 does not remain at a low level for more than 30 seconds, Q1 driving continues to be normal, and the power switch circuit 100 and the auxiliary power supply 400 in the energy storage system operate normally.

[0151] Step 6: When the detection interface level detected by GPIO1 remains low for more than 30 seconds, GPIO2 sends a low-level shutdown signal, Q2 is turned off, and the first energy storage device 111C2 is slowly charged until the Q1 driving voltage is too low and less than the turn-on threshold, Q1 is turned off, and the auxiliary power supply 400 is turned off.

[0152] The embodiment of the present application also provides a control method for an energy storage system.

[0153] The control method of the energy storage system provided in the embodiment of the present application can be executed by an electronic device or a functional module or functional entity in the electronic device that can implement the control method of the energy storage system. The control method of the energy storage system provided in the embodiment of the present application is described below using the electronic device as an example of the execution subject.

[0154] In this embodiment, the start and stop of the auxiliary power supply 400 of the energy storage system is controlled by the power switch circuit 100, the power switch circuit 100 is connected to the first semiconductor switch 300 of the auxiliary power supply 400, the power switch circuit 100 includes a drive unit 110, the drive unit 110 has a first voltage divider circuit provided with a mechanical switch 112 and a first energy storage device 111 connected in series and a second voltage divider circuit provided with a second semiconductor switch 113, the drive unit 110 also has a third voltage divider circuit, one end of the third voltage divider circuit is connected to the first semiconductor switch 300, and the other end of the third voltage divider circuit is connected to the first voltage divider circuit and the second voltage divider circuit; a control unit 120, the control unit 120 has a detection interface 121 and a control interface 122, the detection interface 121 is connected to the first voltage divider circuit, the control interface 122 is connected to the second semiconductor switch 113, and the control unit 120 is connected to the auxiliary power supply 400.

[0155] The first energy storage device 111 and the mechanical switch 112 are connected in series to ground in sequence. The drive unit 110 also has an energy release circuit. The first end of the energy release circuit is connected to the first voltage divider circuit, and the second end of the energy release circuit is connected to the second voltage divider circuit. The first end is arranged between the first energy storage device 111 and the mechanical switch 112, and the second end is arranged at the ground end of the second semiconductor switch 113.

[0156] like Figure 5 As shown, the control method of the energy storage system includes: step 510.

[0157] Step 510: When the second semiconductor switch 113 is turned on, the first energy storage device 111 discharges rapidly through the electric energy release circuit.

[0158] According to the control method of the energy storage system provided in the embodiment of the present application, a mechanical switch 112 and a first energy storage device 111 are set in the first voltage-dividing circuit of the driving unit 110, and a second semiconductor switch 113 is set in the second voltage-dividing circuit of the driving unit 110. The second voltage-dividing circuit provides a driving voltage for maintaining the first semiconductor switch 300 of the auxiliary power supply 400 to be turned on. When the mechanical switch 112 is stuck, the control unit 120 can continuously detect through the detection interface 121 that the detection interface level is less than the first level value, and the control interface 122 controls the second semiconductor switch 113 to be disconnected. The driving voltage of the first semiconductor switch 300 is gradually reduced to less than the turn-on threshold through the first energy storage device 111, and the first semiconductor switch 300 is disconnected. When the mechanical switch 112 is stuck, the auxiliary power supply 400 can be turned off to avoid continuous power consumption of the auxiliary power supply 400.

[0159] A specific embodiment of a control method for an energy storage system is introduced below.

[0160] like Figure 6 As shown, the corresponding Figure 2 A control method for the energy storage system of the power switch circuit 100 is shown.

[0161] Step 1: When the auxiliary power supply 400 is working normally, press the SW1 button.

[0162] Step 2: MCU GPIO1 detects a low level and sends it to MCU GPIO2. MCU GPIO2 controls Q2 to turn off, Q1 is turned off accordingly, and the auxiliary power supply 400 is disconnected.

[0163] Step 3: Quickly press SW1 again, the voltage of the first energy storage device 111 is close to 0, Q1 is turned on, and the auxiliary power supply 400 starts working immediately.

[0164] Step 4: After the auxiliary power supply 400 works, the single-chip microcomputer works, the single-chip microcomputer sends a high level to GPIO2, GPIO2 controls Q2 to turn on, and the first energy storage device 111 discharges through R3, so that the electric energy in the first energy storage device 111 is close to 0.

[0165] Step 5: Wait for the next press of the SW1 button to turn off the auxiliary power 400.

[0166] In some embodiments, Figure 7As shown, an embodiment of the present application further provides an electronic device 700, including a processor 701, a memory 702, and a computer program stored in the memory 702 and executable on the processor 701. When the program is executed by the processor 701, each process of the control method embodiment of the above-mentioned energy storage system is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be described here.

[0167] The embodiment of the present application also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, each process of the control method embodiment of the energy storage system is implemented, and the same technical effect can be achieved. To avoid repetition, it is not repeated here. The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer-readable storage medium.

[0168] The embodiment of the present application also provides a computer program product, including a computer program, which implements the control method of the energy storage system when executed by a processor. The processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium.

[0169] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned energy storage system control method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0170] 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.

[0171] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, 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, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices 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 method 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.

[0172] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method.

[0173] 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.

[0174] 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 data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, 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.

[0175] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0176] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A power switch circuit, characterized in that: The power switch circuit is used to control the start and stop of the auxiliary power supply of the energy storage system. The power switch circuit is connected to the first semiconductor switch of the auxiliary power supply. The power switch circuit includes: A driving unit, the driving unit comprising a first voltage-dividing circuit provided with a mechanical switch and a first energy storage device connected in series, and a second voltage-dividing circuit provided with a second semiconductor switch, the driving unit further comprising a third voltage-dividing circuit, one end of the third voltage-dividing circuit being connected to the first semiconductor switch, and the other end of the third voltage-dividing circuit being connected to the first voltage-dividing circuit and the second voltage-dividing circuit; A control unit, the control unit having a detection interface and a control interface, the detection interface is connected to the first voltage divider circuit, the control interface is connected to the second semiconductor switch, and the control unit is connected to the auxiliary power supply; Wherein, when the mechanical switch is switched to closed, the first voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch to stimulate the first semiconductor switch to be turned on, so as to turn on the auxiliary power supply, and the control unit is used to control the second semiconductor switch to be turned on when the auxiliary power supply is turned on, and the second voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch to keep the first semiconductor switch turned on; When the auxiliary power supply is in the on state, the control unit is used to control the second semiconductor switch to be disconnected when it is determined that the detection interface level of the first voltage divider circuit is less than the first level value and the duration is greater than the target duration, and the driving voltage provided to the first semiconductor switch by the first voltage divider circuit and the third voltage divider circuit is gradually reduced to less than the turn-on threshold of the first semiconductor switch through the first energy storage device, so that the first semiconductor switch is disconnected.

2. The power switch circuit according to claim 1, characterized in that: The first energy storage device and the mechanical switch are connected in series to ground in sequence. The drive unit also has an energy release circuit. The first end of the energy release circuit is connected to the first voltage divider circuit, and the second end of the energy release circuit is connected to the second voltage divider circuit. The first end is arranged between the first energy storage device and the mechanical switch, and the second end is arranged at the ground end of the second semiconductor switch.

3. The power switch circuit according to claim 2, characterized in that: The electric energy release circuit is provided with a first isolation component, the input end of the first isolation component is arranged at the second end, and the output end of the first isolation component is arranged at the first end.

4. The power switch circuit according to claim 1, characterized in that: The first voltage-dividing circuit further includes a first voltage-dividing resistor, and the first voltage-dividing resistor is connected in parallel with the first energy storage device.

5. The power switch circuit according to claim 1, characterized in that: The third voltage-dividing circuit is provided with a second voltage-dividing resistor and a third voltage-dividing resistor connected in series.

6. The power switch circuit according to claim 5, characterized in that: The second voltage-dividing resistor is connected in parallel with a second energy storage device.

7. The power switch circuit according to any one of claims 1 to 6, characterized in that: The first voltage divider circuit is provided with a second isolation component, the input end of the second isolation component is connected to the first energy storage device, and the output end of the second isolation component is connected to the mechanical switch.

8. The power switch circuit according to any one of claims 1 to 6, characterized in that: The second voltage-dividing circuit further includes a fourth voltage-dividing resistor, and the fourth voltage-dividing resistor is connected in series with the second semiconductor switch.

9. An energy storage system, characterized in that: include: Auxiliary power supply; The power switch circuit according to any one of claims 1 to 8, wherein the power switch circuit is connected to the first semiconductor switch of the auxiliary power supply, and the power switch circuit is used to control the start and stop of the auxiliary power supply.

10. A control method for an energy storage system, characterized in that: The method is applied to the energy storage system according to claim 9, and the method comprises: When the mechanical switch is switched to closed, the first voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch to stimulate the first semiconductor switch to turn on, so as to turn on the auxiliary power supply. When the auxiliary power supply is turned on, the control unit controls the second semiconductor switch to turn on, and the second voltage divider circuit and the third voltage divider circuit provide a driving voltage for the first semiconductor switch to keep the first semiconductor switch turned on. When the auxiliary power supply is in the on state, the control unit controls the second semiconductor switch to be disconnected when it is determined that the detection interface level of the first voltage divider circuit is less than the first level value and the duration is greater than the target duration, and the driving voltage provided to the first semiconductor switch by the first voltage divider circuit and the third voltage divider circuit is gradually reduced to less than the turn-on threshold of the first semiconductor switch through the first energy storage device, so that the first semiconductor switch is disconnected.

11. A control method for an energy storage system, characterized in that: The start and stop of the auxiliary power supply of the energy storage system is controlled by a power switch circuit, the power switch circuit is connected to the first semiconductor switch of the auxiliary power supply, the power switch circuit includes a drive unit, the drive unit has a first voltage divider circuit provided with a mechanical switch and a first energy storage device connected in series, and a second voltage divider circuit provided with a second semiconductor switch, the drive unit also has a third voltage divider circuit, one end of the third voltage divider circuit is connected to the first semiconductor switch, and the other end of the third voltage divider circuit is connected to the first voltage divider circuit and the second voltage divider circuit; a control unit, the control unit has a detection interface and a control interface, the detection interface is connected to the first voltage divider circuit, the control interface is connected to the second semiconductor switch, and the control unit is connected to the auxiliary power supply; the first energy storage device and the mechanical switch are connected to ground in series in sequence, the drive unit also has an electric energy release circuit, the first end of the electric energy release circuit is connected to the first voltage divider circuit, the second end of the electric energy release circuit is connected to the second voltage divider circuit, the first end is arranged between the first energy storage device and the mechanical switch, and the second end is arranged at the grounding end of the second semiconductor switch, and the method includes: When the second semiconductor switch is turned on, the first energy storage device is quickly discharged through the electric energy release circuit.

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