Energy storage system protection circuit

Abstract

The utility model discloses an energy storage system protection circuit comprising a PCS module, a BMS module, a DC-DC module, a battery box, a dual normally open relay, a normally closed relay, a start self-reset button, and a circuit breaker. The BMS module controls the normally-closed relay and provides a power supply for the circuit breaker. The PCS module is connected with and controls the battery box, the circuit breaker and the DC-DC module; the DC-DC module supplies power to the normally closed relay, the double normally open relay, the BMS module and the start self-reset button; one path of the double-normally-open relay is connected with the starting self-reset button, and the other path controls the positive electrode of the BMS module power supply; the normally-closed relay controls the double normally-open relay loop. The high-voltage side of the battery box is connected with the circuit breaker, and the low-voltage side is connected with According to the utility model, the automatic identification of the operation state of the energy storage circuit is realized, the problem that the circuit is cut off in abnormal states such as faults of the system is effectively solved, and the remote control of the system is realized through the arrangement of the shunt excitation module, so that the energy storage system is protected, and the safety of the energy storage system in the working process is improved.

Description

Technical Field

[0001] The utility model relates to an energy storage system protection circuit, belonging to the field of new energy. Background Art

[0002] The energy storage system is a system that can store and supply electrical energy. It has the functions of smooth transition, peak shaving and valley filling, frequency modulation and decompression, etc., which can reduce the randomness, intermittency and volatility of energy output. As an important part of the new energy industry, it is of great significance to the smooth operation of the entire energy system. At present, fuses are generally used to protect the circuit in the control circuit of the energy storage system. They are generally used to deal with abnormal situations such as circuit overload and high current impact. They are passive protection. When other warnings or failures occur in the system, the circuit cannot be cut off. The overall safety and performance are insufficient. Utility Model Content

[0003] The utility model aims to provide a protection circuit for an energy storage system to solve the technical problem in the background technology that the system has insufficient protection capabilities against other warnings and faults.

[0004] The technical solution to achieve the purpose of the utility model is: an energy storage system protection circuit, characterized in that it includes a PCS module, a BMS module, a DC-DC module, a battery box, a double normally open relay, a normally closed relay, a start self-reset button, and a circuit breaker;

[0005] The BMS module controls the normally closed relay and provides power to the circuit breaker;

[0006] The PCS module connects and controls the battery box, circuit breaker and DC-DC module;

[0007] The DC-DC module provides power for the normally closed relay, dual normally open relays, BMS module, and start-up self-reset button;

[0008] One of the dual normally open relays is connected to the start self-reset button, and the other controls the positive pole of the BMS module power supply;

[0009] The normally closed relay controls a dual normally open relay circuit;

[0010] The high voltage side of the battery box is connected to a circuit breaker, and the low voltage side is connected to a DC-DC module.

[0011] In the above modules, the control chip models of each module are: the BMS module chip model is FS32K148, and the DC-DC module chip model is NCP1252ADR2G.

[0012] During use, when the BMS module detects an alarm or fault in the system, it can control the positive circuit of the power supply output connected to the normally closed relay interface to form a loop of the normally closed relay coil, and the normally closed loop is disconnected. After the disconnection, the normally closed relay controls the circuit of the dual normally open relay coil to be disconnected, and the two normally open circuits of the dual normally open relay return from the connected state to the disconnected state. In this way, the circuit state can be effectively monitored and the intelligence of the control level can be improved.

[0013] The circuit breaker is provided with a shunt module, and the BMS module is provided with a shunt control power supply. The shunt module adopts a passive structure, and the line can be remotely controlled at this time, and can be remotely cut off in emergency situations such as fire, thereby further improving the safety of the system.

[0014] The BMS module is equipped with an information monitoring system to control the positive pole of the normally closed relay and the power supply of the circuit breaker shunt module. At this time, the dual normally open relays and circuit breakers can be controlled simultaneously through the BMS module. When the BMS module detects an abnormality, the overall power-off operation can be performed through a remote automatic program, or the operation can be performed after manual confirmation to prevent misjudgment and ensure stability.

[0015] The normally closed relay controls the positive pole of the input power supply of the double normally open relay coil through the control end of the relay.

[0016] The start self-reset button controls the negative pole of the input power supply at the coil end of the double normally open relay.

[0017] The BMS module has an abnormality detection function. The BMS module controls the normally closed relay, and the normally closed relay controls the dual normally open relay circuit; the BMS module shunt control power supply control circuit breaker shunt module connects the circuit.

[0018] By adopting the above technical scheme, the utility model has the following beneficial effects: the utility model realizes automatic identification of the operating status of the energy storage circuit through the coordinated use of the BMS module, the dual normally open relays, and the PCS module, effectively solving the problem of circuit cutting off under abnormal conditions such as system failure, and realizes remote control of the system through the setting of the shunt module, thereby protecting the energy storage system and improving the safety of the energy storage system during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] The numbers in the accompanying drawings are: PCS module 1, BMS module 2, DC-DC module 3, battery box 4, double normally open relay 5, normally closed relay 6, start self-reset button 7, circuit breaker 8. DETAILED DESCRIPTION

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the embodiments of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present utility model.

[0027] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly stipulated and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the scope of protection of the utility model.

[0028] (Example 1)

[0029] See Figure 1 In this embodiment, the positive power supply loop of the high-voltage side of the energy storage system protection circuit battery box 4 is connected to the input interface of the circuit breaker 8, and the output interface of the circuit breaker 8 is connected to the PCS module 1, and is also connected to the positive input power supply of the DC-DC module 3. The negative power supply loop of the high-voltage side of the battery box 4 is connected to the PCS module 1, and is also connected to the negative input of the DC-DC module 3. After the DC-DC module 3 converts the high-voltage electricity into a low-voltage power supply, it provides the negative power supply input to the coil end of the normally closed relay 6, the BMS module 2, the start self-reset button 7, and the interface No. 3 of the first normally open circuit (interfaces No. 3 and No. 5) of the double normally open relay 5. It provides the positive power supply input to the interface No. 5 of the normally closed relay 6 and the interface No. 4 of the second normally open circuit (interfaces No. 4 and No. 6) of the double normally open relay 5.

[0030] After pressing the start self-reset button 7, the negative pole of the power supply is connected to the interface No. 7 of the dual normally open relay 5, the coil interface No. 8 of the dual normally open relay 5 is connected to the interface No. 1 of the normally closed relay 6, and the interface No. 5 of the normally closed relay 6 is connected to the positive pole of the output power supply of the DC-DC module 2 to form a loop, and the two normally open circuits of the dual normally open relay 5 are energized and connected. After the start button is reset, the interfaces 3, 5, and 7 of the dual normally open relay 5 are connected to form a self-locking of the dual normally open relay 5, and the interfaces No. 4 and No. 6 are connected to the positive pole of the input power supply of the BMS module 2, and the BMS module 2 starts to work to monitor the energy storage system.

[0031] When the BMS module 2 detects a system output alarm or failure, it can control the power output + output power positive circuit connected to the No. 8 interface of the normally closed relay 6 so that the coil of the normally closed relay 6 forms a loop to control the normally closed circuit between the No. 1 and No. 5 buckles to disconnect. After disconnection, the normally closed relay 6 controls the circuit of the double normally open relay 5 coil to disconnect, and the two normally open circuits of the double normally open relay 5 return from the connected state to the disconnected state. At the same time, the output power of the shunt control power supply + and shunt control power supply - circuits connected to the circuit breaker 8 can also be controlled to connect the C1 and C2 of the shunt to control the circuit breaker 8 to disconnect, thereby stopping the system and protecting the system.

[0032] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protection circuit for an energy storage system, characterized in that: It includes a PCS module (1), a BMS module (2), a DC-DC module (3), a battery box (4), a double normally open relay (5), a normally closed relay (6), a start self-reset button (7), and a circuit breaker (8); The BMS module (2) controls the normally closed relay (6) and provides power to the circuit breaker (8); The PCS module (1) is connected to and controls the battery box (4), the circuit breaker (8) and the DC-DC module (3); The DC-DC module (3) supplies power to the normally closed relay (6), the dual normally open relays (5), the BMS module (2), and the start self-reset button (7); One of the dual normally open relays (5) is connected to the start self-reset button (7), and the other controls the positive pole of the power supply of the BMS module (2); The normally closed relay (6) controls the dual normally open relay (5) circuit; The high-voltage side of the battery box (4) is connected to a circuit breaker (8), and the low-voltage side is connected to a DC-DC module (3).

2. The energy storage system protection circuit according to claim 1, characterized in that: The circuit breaker (8) is provided with a shunt module, and the BMS module (2) is provided with a shunt control power supply.

3. An energy storage system protection circuit according to claim 2, characterized in that: The BMS module (2) is provided with an information monitoring system, which controls the positive pole of the normally closed relay (6) and simultaneously controls the power supply of the shunt module of the circuit breaker (8).

4. The energy storage system protection circuit according to claim 1, characterized in that: The normally closed relay (6) controls the positive pole of the coil input power supply of the double normally open relay (5) through the control end of the relay.

5. The energy storage system protection circuit according to claim 1, characterized in that: The start self-reset button (7) controls the negative pole of the input power supply at the coil end of the double normally open relay (5).

6. The energy storage system protection circuit according to claim 2, characterized in that: The BMS module (2) has an abnormality detection function. The BMS module (2) controls the normally closed relay (6), and the normally closed relay (6) controls the double normally open relay (5) circuit; the BMS module (2) shunt control power supply control circuit breaker (8) shunt module connects the circuit.

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