Switch control circuit and energy storage system

Abstract

The utility model relates to a switch control circuit and an energy storage system. The switch control circuit comprises a control module, a first closing relay, a first opening relay and a first isolation switch QS1. The first closing relay comprises a first closing auxiliary coil K2 and a first closing auxiliary switch S200, and the first opening relay comprises a first opening auxiliary coil K1 and a first opening auxiliary switch S100; the first isolation switch QS1 comprises a first closing coil K11, a first opening coil K10 and a first state switch S1. Power-on and power-off of the first switching-on auxiliary coil and the first switching-off auxiliary coil are controlled through the control module, so that switching-on and switching-off of the first switching-on auxiliary switch and the first switching-off auxiliary switch are adjusted, remote control over switching-on and switching-off between the battery compartment and the PCS is achieved, manual operation errors are avoided, and labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy energy storage system management field especially, and it is a kind of switch control circuit and energy storage system. BACKGROUND

[0002] Battery cabin and PCS (Power Conversion System) are the key components in energy storage system, they work together to realize the storage, conversion and regulation of electric energy. Battery cabin is responsible for storing electric energy, while PCS is responsible for converting the direct current electric energy in battery cabin into alternating current electric energy, or converting the alternating current electric energy in power grid into direct current electric energy stored in battery cabin, and regulating voltage and frequency to ensure stable output of energy and safe operation of power grid.

[0003] In the prior art, battery cabin and PCS are connected or disconnected through closing and opening operations. Opening is to disconnect battery cabin from PCS to cut off energy flow and ensure personnel safety for easy equipment maintenance or repair. Closing is to connect battery cabin with PCS to establish energy flow channel and realize energy storage or release. However, current most energy storage system designs require operation and maintenance personnel to directly operate switch panel button to control switch closing and opening, which is time-consuming and laborious, high in cost and not conducive to operation and maintenance management. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of switch control circuit and energy storage system, remote control switch opening and closing, avoid human operation error, reduce labor cost.

[0005] The utility model provides a kind of switch control circuit, comprising: control module, first closing relay, first opening relay and first disconnecting switch QS1;

[0006] The first closing relay includes first closing auxiliary coil K2 and first closing auxiliary switch S200, and the first opening relay includes first opening auxiliary coil K1 and first opening auxiliary switch S100;The first disconnecting switch QS1 includes first closing coil K11, first opening coil K10 and first state switch S1;

[0007] The output end R1_C and the output end R0_C of the control module are connected with one end of the first closing auxiliary coil K2 and one end of the first opening auxiliary coil K1 respectively; the other end of the first closing auxiliary coil K2 and the other end of the first opening auxiliary coil K1 are connected with the negative pole Z- of the power supply; one end of the first closing auxiliary switch S200 is connected with the positive pole Z+ of the power supply, and the other end is connected with the first closing coil K11, and the other end of the first closing coil K11 is connected with the negative pole Z- of the power supply; one end of the first opening auxiliary switch S100 is connected with the positive pole Z+ of the power supply, and the other end is connected with the first opening coil K10, and the other end of the first opening coil K10 is connected with the negative pole Z- of the power supply;

[0008] The output end R1_N0 and the output end R0_N0 of the control module are connected with the positive pole Z+ of the power supply;

[0009] One end of the first state switch S1 is connected with the input end DI_1 of the control module.

[0010] Further, the second closing relay, the second opening relay and the second disconnecting switch QS2 are further included.

[0011] The second closing relay includes the second closing auxiliary coil K4 and the second closing auxiliary switch S400, and the second opening relay includes the second opening auxiliary coil K3 and the second opening auxiliary switch S300; the first disconnecting switch QS1 includes the second closing coil K21, the second opening coil K20 and the second state switch S2.

[0012] The output end R3_C and the output end R2_C of the control module are connected with one end of the second opening auxiliary coil K3 and one end of the second closing auxiliary coil K4 respectively; the other end of the second opening auxiliary coil K3 and the other end of the second closing auxiliary coil K4 are connected with the negative pole Z- of the power supply respectively;

[0013] One end of the second closing auxiliary switch S400 is connected with the positive pole Z+ of the power supply, and the other end is connected with one end of the second closing coil K21, and the other end of the second closing coil K21 is connected with the negative pole Z- of the power supply; one end of the second opening auxiliary switch S300 is connected with the positive pole Z+ of the power supply, and the other end is connected with the second opening coil K20, and the other end of the second opening coil K20 is connected with the negative pole Z- of the power supply;

[0014] The output end R3_N0 and the output end R2_N0 of the control module are connected with the positive pole Z+ of the power supply;

[0015] One end of the second state switch S2 is connected with the output end DI_2 of the control module, and the other end is connected with the negative pole Z- of the power supply.

[0016] Furthermore, the first disconnecting switch QS1 and the second disconnecting switch QS2 also include a first energy storage motor and a second energy storage motor;

[0017] The first energy storage motor and the second energy storage motor are respectively connected to the positive terminal Z+ and the negative terminal Z- of the power supply.

[0018] Furthermore, it also includes a first relay, which includes a first coil K5, a first switch S500, and a second switch S501;

[0019] The first coil K5 is connected in parallel with the first closing coil K11; one end of the first switch S500 is connected to the positive terminal Z+ of the power supply, and the other end is connected to one end of the second closing auxiliary switch S400; one end of the second switch S501 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the first energy storage motor.

[0020] Furthermore, it also includes a second relay, which includes a second coil K6, a third switch S600, and a fourth switch S601;

[0021] The second coil K6 is connected in parallel with the second closing coil K21; one end of the third switch S600 is connected to the positive terminal Z+ of the power supply, and the other end is connected to one end of the first closing auxiliary switch S200; one end of the fourth switch S601 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the second energy storage motor.

[0022] Furthermore, one end of the emergency stop switch S3 is connected to the input terminal DI_0 of the control module, and the other end is connected to the negative terminal Z- of the power supply.

[0023] Furthermore, it also includes a management module, which is connected to the input terminal Eth of the control module.

[0024] Furthermore, the control module also includes a power supply terminal V+ and a power supply terminal V-;

[0025] The power supply terminal V+ is connected to the positive power supply terminal Z+, and the power supply terminal V- is connected to the negative power supply terminal Z-.

[0026] Furthermore, the control module also includes a signal sampling terminal COM, which is connected to the positive terminal Z+ of the power supply.

[0027] This utility model also provides an energy storage system, including a battery compartment and an energy conversion system; the connection and disconnection between the battery compartment and the energy conversion system are controlled by the above-mentioned switch control circuit.

[0028] Compared with the prior art, the present invention has at least the following technical effects:

[0029] By transmitting commands to the control module, the power-on and power-off of the first closing auxiliary coil and the first opening auxiliary coil can be controlled through the control module to adjust the closing and opening of the first closing auxiliary switch and the first opening auxiliary switch. Ultimately, this realizes the power-on and power-off of the first closing coil and the first opening coil of the first isolating switch, thereby achieving remote control of the opening and closing of the battery compartment and the PCS, avoiding human operation errors and reducing labor costs. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the switch control circuit in this utility model;

[0031] Figure 2 This is a simplified structural diagram of the battery compartment and energy conversion system in this utility model. Detailed Implementation

[0032] The following description, in conjunction with schematic diagrams, illustrates a switch control circuit and energy storage system according to the present invention, which represent preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0033] The present invention will be described more specifically by way of example with reference to the accompanying drawings in the following paragraphs. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0034] Please refer to Figure 1 This embodiment provides a switch control circuit, including: a control module 1, a first closing relay, a first opening relay, and a first disconnecting switch QS1.

[0035] Specifically, the first closing relay includes a first closing auxiliary coil K2 and a first closing auxiliary switch S200, the first opening relay includes a first opening auxiliary coil K1 and a first opening auxiliary switch S100; the first disconnecting switch QS1 includes a first closing coil K11, a first opening coil K10 and a first status switch S1.

[0036] The output terminals R1_C and R0_C of the control module 1 are respectively connected to one end of the first closing auxiliary coil K2 and one end of the first opening auxiliary coil K1; the other end of the first closing auxiliary coil K2 and the other end of the first opening auxiliary coil K1 are connected to the negative terminal Z- of the power supply.

[0037] One end of the first closing auxiliary switch S200 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the first closing coil K11. The other end of the first closing coil K11 is connected to the negative terminal Z- of the power supply. One end of the first opening auxiliary switch S100 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the first opening coil K10. The other end of the first opening coil K10 is connected to the negative terminal Z- of the power supply.

[0038] The output terminals R1_N0 and R0_N0 of the control module 1 are connected to the positive terminal Z+ of the power supply.

[0039] One end of the first state switch S1 is connected to the input terminal DI_1 of the control module 1.

[0040] In this embodiment, the negative power supply Z- and the positive power supply Z+ are used to supply power to the control module 1 and all electronic components mentioned in this embodiment, such as the first closing relay, the first opening relay, and the first disconnecting switch QS1.

[0041] Please refer to Figure 2 In this embodiment, the switch control circuit is used in an energy storage system, which includes a first battery compartment 800, a second battery compartment 900, and a bidirectional converter (PCS) 700. The switch control circuit controls the connection and disconnection between the battery compartments and the energy conversion system. Specifically, when the first disconnecting switch QS1 is closed, the first battery compartment 800 is connected to the energy conversion system; when the second disconnecting switch QS2 is closed, the second battery compartment 900 is connected to the energy conversion system. Conversely, the two battery compartments are disconnected. It is understood that the switch control circuit disclosed in this embodiment is not limited to use in new energy storage systems but can also be used in other industry sectors, such as smart homes, data centers, and industrial automation.

[0042] In this embodiment, the first closing auxiliary switch S200 and the first opening auxiliary switch S100 are set to a normally open state in the first closing relay and the first opening auxiliary relay. That is, when the first opening auxiliary coil K1 or the first closing auxiliary coil K2 is de-energized, the corresponding first opening auxiliary switch S100 or the first closing auxiliary switch S200 is opened; when the first opening auxiliary coil K1 or the first closing auxiliary coil K2 is energized, the corresponding first opening auxiliary switch S100 or the first closing auxiliary switch S200 is closed.

[0043] Switch control circuits have the following two forms:

[0044] Example 1

[0045] When the first disconnector switch QS1 is in the open state and needs to be closed, the control output terminals R1_C and R1_N0 are energized, thereby energizing the first closing auxiliary coil K2. The contacts of the first closing auxiliary switch S200 close, energizing the first closing coil K11 in the first disconnector switch QS1, and closing the first state switch S1 in the first disconnector switch QS1. When the control module 1 detects that the first state switch S1 has switched to closed, it de-energizes the control output terminals R1_C and R1_N0 to prevent the first closing coil K11 from burning out. In this example, closing between the first battery compartment 800 and PCS700 can be achieved.

[0046] Example 2

[0047] When the first disconnector switch QS1 is closed and needs to be opened, the control output terminals R0_C and R0_N0 are energized, thereby energizing the first opening auxiliary coil K1. At this time, the contacts of the first opening auxiliary switch S100 close, thereby energizing the first opening coil K10 in the first disconnector switch QS1, thus opening the first state switch S1 in the first disconnector switch QS1. When the control module 1 detects that the first state switch S1 has opened, it de-energizes the control output terminals R0_C and R0_N0 to prevent the first opening coil K10 from burning out. In this example, the opening between the first battery compartment 800 and PCS700 can be achieved.

[0048] As can be seen, in this embodiment, by transmitting instructions to the control module 1, the control module 1 can control the power-on and power-off of the first closing auxiliary coil K2 and the first opening auxiliary coil K1, thereby adjusting the closing and opening of the first closing auxiliary switch S200 and the first opening auxiliary switch S100. Ultimately, this realizes the power-on and power-off of the first closing coil K11 and the first opening coil K10 of the first isolating switch QS1, thereby achieving remote control of the opening and closing of the battery compartment and PCS700, avoiding human error and reducing labor costs.

[0049] For further information, please refer to the following: Figure 1 This embodiment also includes a second closing relay, a second opening relay, and a second disconnecting switch QS2. The above electronic components, together with the control module 1, are used to realize remote control of the opening and closing of the second battery compartment 900 and PCS700.

[0050] Specifically, the second closing relay includes a second closing auxiliary coil K4 and a second closing auxiliary switch S400, the second opening relay includes a second opening auxiliary coil K3 and a second opening auxiliary switch S300; the second disconnecting switch QS2 includes a second closing coil K21, a second opening coil K20 and a second status switch S2.

[0051] The output terminals R3_C and R2_C of the control module 1 are respectively connected to one end of the second closing auxiliary coil K4 and one end of the second opening auxiliary coil K3; the other end of the second opening auxiliary coil K3 and the other end of the second closing auxiliary coil K4 are respectively connected to the negative terminal Z- of the power supply.

[0052] One end of the second closing auxiliary switch S400 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the second closing coil K21. The other end of the second closing coil K21 is connected to the negative terminal Z- of the power supply. One end of the second opening auxiliary switch S300 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the second opening coil K20. The other end of the second opening coil K20 is connected to the negative terminal Z- of the power supply.

[0053] The output terminals R3_N0 and R2_N0 of the control module 1 are connected to the positive terminal Z+ of the power supply.

[0054] One end of the second state switch S2 is connected to the output terminal DI_2 of the control module 1, and the other end is connected to the negative terminal Z- of the power supply.

[0055] In the second closing relay and the second opening relay, the second closing auxiliary switch S400 and the second opening auxiliary switch S300 are normally open. When the second closing auxiliary coil K4 or the second opening auxiliary coil K3 in the second closing relay or the second opening relay is de-energized, the corresponding second closing auxiliary switch S400 or the second opening auxiliary switch S300 is opened; when the second closing auxiliary coil K4 or the second opening auxiliary coil K3 is energized, the corresponding second closing auxiliary switch S400 or the second opening auxiliary switch S300 is closed.

[0056] In this embodiment, when the control module 1 controls the second closing auxiliary coil K4 and the second opening auxiliary coil K3 to be in the power-on and power-off states, it adjusts the closing and opening of the second closing auxiliary switch S400 and the second opening auxiliary switch S300, ultimately realizing the power-on and power-off of the second closing coil K21 and the second opening coil K20 of the second isolating switch QS2. This further enables remote control of the opening and closing of the second battery compartment 900 and PCS700, avoiding human error and reducing labor costs.

[0057] It is understandable that the specific control process of the second control switch is the same as that of the first disconnecting switch QS1, so it will not be described again here.

[0058] Furthermore, in this embodiment, the first disconnecting switch QS1 further includes a first energy storage motor 12, and the second disconnecting switch QS2 further includes a second energy storage motor 22.

[0059] Specifically, the two ends of the first energy storage motor 12 and the second energy storage motor 22 are respectively connected to the positive terminal Z+ and the negative terminal Z- of the power supply.

[0060] Understandably, the energy storage motor in a disconnecting switch is mainly used to drive the mechanical operation of the disconnecting switch, converting electrical energy into mechanical energy. When the disconnecting switch closes after the disconnecting switch is turned on, the energy storage motor will automatically store energy for the closing mechanism if there is a power supply, so as to store energy for the next closing operation.

[0061] Furthermore, in this embodiment, only one of the first closing coil K11 and the second closing coil K21 is normally energized to keep the switch control circuit operating in a safe environment. To prevent the switch control circuit from being overloaded due to the simultaneous energization of the first closing coil K11 and the second closing coil K21, this embodiment also provides a first relay and a second relay in the switch control circuit.

[0062] Specifically, the first coil K5 is connected in parallel with the first closing coil K11; one end of the first switch S500 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the second energy storage motor 21; one end of the second switch S501 is connected to the positive terminal Z+ of the power supply, and the other end is connected to one end of the second closing auxiliary switch S400.

[0063] The second coil K6 is connected in parallel with the second closing coil K21; one end of the third switch S600 is connected to the positive terminal Z+ of the power supply, and the other end is connected to one end of the first closing auxiliary switch S200; one end of the fourth switch S601 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the second energy storage motor 22.

[0064] In this embodiment, the first switch S500 and the second switch S501 in the first relay, and the third switch S600 and the fourth switch S601 in the second relay are set to a normally closed state. That is, when the first coil K5 and the second coil K6 in the first and second relays are de-energized, the first switch S500 and the second switch S501 in the first relay, and the third switch S600 and the fourth switch S601 in the second relay are in a closed state; and when the first coil K5 and the second coil K6 are energized, the first switch S500 and the second switch S501 in the first relay, and the third switch S600 and the fourth switch S601 in the second relay are in an open state.

[0065] The operation of the switch control circuit after adding the first and second relays has the following form:

[0066] Example 3

[0067] When the first disconnecting switch QS1 is in the open state, the first closing auxiliary coil K2 is energized, the third switch S600 and the fourth switch S601 are in the normally closed state, the normally open contact of the first closing auxiliary switch S200 is closed, and the first closing coil K11 is energized, causing the first disconnecting switch QS1 to close. At the same time as the first closing coil K11 closes, the first coil K5 in the first relay is energized, thereby controlling the contacts at both ends of the first switch S500 and the contacts at both ends of the second switch S501 to open. The second disconnecting switch QS2 cannot be closed at the same time, and the first energy storage motor 12 of the first disconnecting switch QS1 cannot store energy at the same time.

[0068] Example 4

[0069] When the second disconnector switch QS2 is in the open state, the second closing auxiliary coil K4 is energized, the first switch S500 and the second switch S501 are in the normally closed state, the normally open contact of the second closing auxiliary switch S400 is closed, the second closing coil K21 is energized, and the contacts at both ends of the second state switch S2 are closed. Simultaneously with the energization of the second closing coil K21, the second coil K6 in the second relay is also energized, thereby controlling the contacts at both ends of the third switch S600 and the fourth switch S601 to open. The first disconnector switch QS1 cannot perform a closing operation simultaneously, and the second energy storage motor 22 of the second disconnector switch QS2 cannot store energy simultaneously.

[0070] As can be seen, the interlocking control of the first disconnector QS1 and the second disconnector QS2 is achieved through the third and fourth relays, so that the first disconnector QS1 and the second disconnector QS2 will not close at the same time, reducing the inrush current of the control circuit and protecting the circuit and equipment.

[0071] Furthermore, this embodiment also includes an emergency stop switch S3. The emergency stop switch S3 is used to energize the first tripping auxiliary coil K1 and the second tripping auxiliary coil K3, thereby controlling the first disconnecting switch QS1 and the second disconnecting switch QS2 to trip. In emergency situations, such as a short circuit, the electronic components in the protection switch control circuit are not damaged.

[0072] Specifically, one end of the emergency stop switch S3 is connected to the input terminal DI_0 of the control module 1, and the other end is connected to the negative terminal Z- of the power supply.

[0073] In this embodiment, the control module 1 further includes a power supply terminal V+ and a power supply terminal V-, which are used to receive power supply voltage to power the control module 1.

[0074] In this embodiment, the control module 1 further includes a signal sampling terminal COM, which is connected to the positive terminal Z+ of the power supply.

[0075] In one specific embodiment, the control module 1 is an LC controller (Local Control), which is responsible for controlling the state of the disconnecting switch and opening and closing the disconnecting switch according to remote commands or local inputs.

[0076] In this embodiment, a management module is also included. The management module is used to send control commands to the control module 1.

[0077] Specifically, the management module is connected to the twelve-terminal Eth of the control module 1.

[0078] In one specific embodiment, the management module is an EMS (Energy Management System). The EMS is connected to the local controller via Eth (Ethernet) and can remotely send control commands, such as commands to control the opening and closing of the first disconnecting switch QS1 and the second disconnecting switch QS2.

[0079] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A switch control circuit, characterized in that, include: Control module, first closing relay, first opening relay and first disconnecting switch QS1; The first closing relay includes a first closing auxiliary coil K2 and a first closing auxiliary switch S200; the first opening relay includes a first opening auxiliary coil K1 and a first opening auxiliary switch S100; the first disconnecting switch QS1 includes a first closing coil K11, a first opening coil K10 and a first status switch S1. The output terminals R1_C and R0_C of the control module are respectively connected to one end of the first closing auxiliary coil K2 and one end of the first opening auxiliary coil K1; the other end of the first closing auxiliary coil K2 and the other end of the first opening auxiliary coil K1 are connected to the negative terminal Z- of the power supply. One end of the first closing auxiliary switch S200 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the first closing coil K11. The other end of the first closing coil K11 is connected to the negative terminal Z- of the power supply. One end of the first opening auxiliary switch S100 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the first opening coil K10. The other end of the first opening coil K10 is connected to the negative terminal Z- of the power supply. The output terminals R1_N0 and R0_N0 of the control module are connected to the positive terminal Z+ of the power supply. One end of the first state switch S1 is connected to the input terminal DI_1 of the control module.

2. The switch control circuit as described in claim 1, characterized in that, It also includes a second closing relay, a second opening relay, and a second disconnecting switch QS2; The second closing relay includes a second closing auxiliary coil K4 and a second closing auxiliary switch S400; the second opening relay includes a second opening auxiliary coil K3 and a second opening auxiliary switch S300; the first disconnecting switch QS1 includes a second closing coil K21, a second opening coil K20, and a second status switch S2. The output terminals R3_C and R2_C of the control module are respectively connected to one end of the second tripping auxiliary coil K3 and one end of the second closing auxiliary coil K4; the other ends of the second tripping auxiliary coil K3 and the second closing auxiliary coil K4 are respectively connected to the negative terminal Z- of the power supply. One end of the second closing auxiliary switch S400 is connected to the positive terminal Z+ of the power supply, and the other end is connected to one end of the second closing coil K21. The other end of the second closing coil K21 is connected to the negative terminal Z- of the power supply. One end of the second opening auxiliary switch S300 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the second opening coil K20. The other end of the second opening coil K20 is connected to the negative terminal Z- of the power supply. The output terminals R3_N0 and R2_N0 of the control module are connected to the positive terminal Z+ of the power supply. One end of the second state switch S2 is connected to the output terminal DI_2 of the control module, and the other end is connected to the negative terminal Z- of the power supply.

3. The switch control circuit as described in claim 2, characterized in that, The first disconnecting switch QS1 and the second disconnecting switch QS2 also include a first energy storage motor and a second energy storage motor; The first energy storage motor and the second energy storage motor are respectively connected to the positive terminal Z+ and the negative terminal Z- of the power supply.

4. The switch control circuit as described in claim 3, characterized in that, It also includes a first relay, which includes a first coil K5, a first switch S500 and a second switch S501; The first coil K5 is connected in parallel with the first closing coil K11; one end of the first switch S500 is connected to the positive terminal Z+ of the power supply, and the other end is connected to one end of the first energy storage motor; one end of the second switch S501 is connected to the positive terminal Z+ of the power supply, and the other end is connected to one end of the second closing auxiliary switch S400.

5. The switch control circuit as described in claim 3, characterized in that, It also includes a second relay, which includes a second coil K6, a third switch S600 and a fourth switch S601; The second coil K6 is connected in parallel with the second closing coil K21; one end of the third switch S600 is connected to the positive terminal Z+ of the power supply, and the other end is connected to one end of the first closing auxiliary switch S200; one end of the fourth switch S601 is connected to the positive terminal Z+ of the power supply, and the other end is connected to the second energy storage motor.

6. The switch control circuit as described in claim 2, characterized in that, It also includes the emergency stop switch S3; One end of the emergency stop switch S3 is connected to the input terminal DI_0 of the control module, and the other end is connected to the negative terminal Z- of the power supply.

7. The switch control circuit as described in claim 1, characterized in that, It also includes a management module, which is connected to the input terminal Eth of the control module.

8. The switch control circuit as described in claim 1, characterized in that, The control module also includes a power supply terminal V+ and a power supply terminal V-; The power supply terminal V+ is connected to the positive power supply terminal Z+, and the power supply terminal V- is connected to the negative power supply terminal Z-.

9. The switch control circuit as described in claim 1, characterized in that, The control module also includes a signal sampling terminal COM, which is connected to the positive terminal Z+ of the power supply.

10. An energy storage system, characterized in that, It includes a battery compartment and an energy conversion system; the connection and disconnection between the battery compartment and the energy conversion system are controlled by a switch control circuit as described in any one of claims 1-9.

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