Energy storage high-voltage box

Abstract

The utility model provides an energy storage high-voltage box, comprising a first main negative contactor and a second main negative contactor which are connected in parallel between a battery cathode and a charge-discharge cathode; the first main positive contactor and the second main positive contactor are arranged between the battery positive electrode and the charging and discharging positive electrode in parallel; the first battery cluster management unit is used for controlling the on-off of the first main negative contactor and the first main positive contactor; and the second battery cluster management unit controls the on-off of the second main negative contactor and the second main positive contactor. According to the utility model, through the dual-system scheme design, the two systems can operate independently, and the dual-system scheme can take over operation when one set of system fails, so that the safety and continuity are ensured, and the reliability and safety of the energy storage high-voltage box are improved, especially in an extreme environment.

Description

Technical Field

[0001] This utility model relates to the field of energy storage high-voltage box technology, specifically to an energy storage high-voltage box. Background Technology

[0002] The energy storage high-voltage box plays a crucial role in the new energy field, serving as the high-voltage circuit management module connecting battery clusters and the power conversion system (PCS). Its primary responsibilities include collecting voltage and current data from the battery clusters, controlling contactor operation, and providing necessary protection functions. The energy storage high-voltage box integrates multiple levels of circuit protection devices, including fuses, relays, and air switches. These components work together, under the monitoring logic of the main control system, to implement phased safety disconnection measures for the battery clusters, ensuring the safe operation of the entire battery system.

[0003] However, most current energy storage high-voltage boxes are equipped with only a single control system. While this design simplifies the architecture, it reveals insufficient reliability in practical applications. When electrical equipment urgently needs power from the energy storage system, any failure in this single control system will directly cause the entire system to malfunction. For some special applications, such as electric ships, this single-system design is clearly insufficient to meet their stringent requirements for the continuity and stability of power supply. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the prior art and provide an energy storage high-voltage box that can solve the problems of poor reliability, poor safety and inability to operate continuously in case of failure in the existing technology.

[0005] To achieve the above and other objectives, this utility model is implemented through the following technical solution: This utility model proposes an energy storage high-voltage box, including a first main negative contactor and a second main negative contactor, connected in parallel between the battery negative terminal and the charge / discharge negative terminal; a first main positive contactor and a second main positive contactor, connected in parallel between the battery positive terminal and the charge / discharge positive terminal; a first battery cluster management unit, controlling the on / off state of the first main negative contactor and the first main positive contactor; a second battery cluster management unit, controlling the on / off state of the second main negative contactor and the second main positive contactor; a molded case circuit breaker, located at the bottom center of the inner cavity of the energy storage high-voltage box, with a first end electrically connected to the first and second main positive contactors and a second end electrically connected to the first and second main negative contactors; and a fuse, located on the left side of the molded case circuit breaker, with one end connected to the battery cluster positive terminal and the other end connected to the parallel-connected first and second main negative contactors.

[0006] In one embodiment, the first main negative contactor and the second main negative contactor are disposed above the fuse.

[0007] In one embodiment, the first main positive contactor and the second main positive contactor are disposed perpendicularly to each other and diagonally above the first main negative contactor and the second main negative contactor.

[0008] In one embodiment, the energy storage high-voltage box further includes a circulating current contactor and a circulating current resistor connected in series, the circulating current contactor and the circulating current resistor being connected in parallel across the first main positive contactor and the second main positive contactor.

[0009] In one embodiment, the circulating contactor and the circulating resistor are arranged side by side at the top of the inner cavity of the energy storage high-voltage box.

[0010] In one embodiment, the first battery cluster management unit and the second battery cluster management unit are arranged side by side on the upper right side of the molded case circuit breaker.

[0011] In one embodiment, when both the first battery cluster management unit and the second battery cluster management unit are working normally, the first battery cluster management unit controls the power-on, operation, power-off, and protection cut-off of the battery cluster.

[0012] In one embodiment, when the first battery cluster management unit malfunctions, the second battery cluster management unit issues an instruction to sever the control authority of the first battery cluster management unit.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model adopts a dual-system design, in which the two systems can operate independently. The dual-system design can take over operation when one system fails, ensuring safety and continuity, and improving the reliability and safety of the energy storage high-voltage box, especially in extreme environments;

[0015] 2. The two systems of this utility model are independent of each other but also communicate with each other. Through the control strategy, the two systems can be operated simultaneously or a single system can be operated.

[0016] 3. The overall structure of this utility model is reasonable, which can reduce the overall space occupation and facilitate wiring. Attached Figure Description

[0017] Figure 1 The diagram shown is a structural schematic of an energy storage high-voltage box according to this utility model.

[0018] Figure 2 The diagram shown is a schematic diagram of an energy storage high-voltage box according to this utility model. Detailed Implementation

[0019] Please see Figures 1-2The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0020] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The terms “a,” “an,” or “the,” as used herein, do not indicate a limitation of quantity, but are merely used to indicate the presence of at least one. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The term “connection” as used herein, unless otherwise specified, includes both direct and indirect connections.

[0022] To avoid confusion with this utility model, some technical features known in the art have not been described.

[0023] like Figures 1-2As shown, this utility model provides an energy storage high-voltage box, including a molded case circuit breaker 1, a fuse 2, a first main negative contactor 3, a second main negative contactor 4, a first main positive contactor 5, a second main positive contactor 6, a circulating current contactor 7, a circulating current resistor 8, a first battery cluster management unit 9, and a second battery cluster management unit 10, all disposed within the inner cavity of the energy storage high-voltage box. The molded case circuit breaker 1 is located at the bottom center of the inner cavity of the energy storage high-voltage box and is connected in parallel between the positive and negative terminals of the energy storage high-voltage box. When the circuit is short-circuited or overloaded, the molded case circuit breaker 1 automatically disconnects the battery circuit. The first end of the molded case circuit breaker 1 is electrically connected to the first main positive contactor 5 and the second main positive contactor 6, and the second end is electrically connected to the first main negative contactor 3 and the second main negative contactor 4. The fuse 2 is located on the left side of the molded case circuit breaker 1, with one end connected to the positive terminal of the battery cluster and the other end connected to the first main negative contactor 3 and the second main negative contactor 4 connected in parallel. The first main negative contactor 3 and the second main negative contactor 4 are connected in parallel between the negative terminal of the battery and the negative terminal for charging and discharging. The first main negative contactor 3 and the second main negative contactor 4 are located above the fuse 2. The first main positive contactor 5 and the second main positive contactor 6 are connected in parallel between the positive terminal of the battery and the positive terminal for charging and discharging. The circulating current contactor 7 and the circulating current resistor 8 are connected in series and in parallel across the two ends of the first main positive contactor 5 and the second main positive contactor 6. The first battery cluster management unit 9 is the main control unit, which controls the on / off state of the first main negative contactor 3 and the first main positive contactor 5. The second battery cluster management unit 10 is the alternative control unit, which controls the on / off state of the second main negative contactor 4 and the second main positive contactor 6.

[0024] Specifically, the first main positive contactor 5 and the second main positive contactor 6 are arranged perpendicularly to each other, diagonally above the first main negative contactor 3 and the second main negative contactor 4, which can reduce the overall space occupation. A right-angled side structure is formed diagonally above the first main negative contactor 3 and the second main negative contactor 4, which facilitates wiring. The circulating current contactor 7 and the circulating current resistor 8 are arranged side by side at the top of the inner cavity of the energy storage high voltage box, which facilitates series wiring. They are also arranged close to the first main positive contactor 5 and the second main positive contactor 6, which facilitates parallel connection with the first main positive contactor 5 and the second main positive contactor 6. The first battery cluster management unit 9 and the second battery cluster management unit 10 are arranged side by side at the upper right of the molded case circuit breaker 1, close to the first main negative contactor 3, the second main negative contactor 4, the first main positive contactor 5 and the second main positive contactor 6, to facilitate contactor control.

[0025] In summary, this utility model employs a high-voltage box scheme with a dual-master control system. The first battery cluster management unit 9 is the master control unit. When both systems are operating normally, the first battery cluster management unit 9 controls the power-on, operation, power-off, and protection cut-off functions of the battery clusters. When the first battery cluster management unit 9 malfunctions, the second battery cluster management unit 10 takes over as the master control unit, issuing commands to sever the control authority of the first battery cluster management unit 9. The second battery cluster management unit 10 then controls the second main negative contactor 4 and the second main positive contactor 6 to support the normal operation of the system.

[0026] Specifically, the power-on process of this utility model is as follows: The molded case circuit breaker 1 is closed, and the battery cluster management unit performs a power-on self-test; after the fault detection passes, the first main negative contactor 3 and the first main positive contactor 5, controlled by the first battery cluster management unit 9, are closed sequentially; then the second main negative contactor 4 and the second main positive contactor 6, controlled by the second battery cluster management unit 10, are closed sequentially; after completion, the battery system operates at the set power. If the fault detection fails, the battery system is prohibited from powering on, and the first main negative contactor 3, the first main positive contactor 5, the second main negative contactor 4, the second main positive contactor 6, and the molded case circuit breaker 1 are disconnected, and the fault information is recorded.

[0027] The dual-system switching process of this utility model is as follows: Under normal battery system operation, when it is detected that the first battery cluster management unit 9 is operating normally while the second battery cluster management unit 10 is offline or faulty, the second main negative contactor 4 and the second main positive contactor 6 controlled by the second battery cluster management unit 10 are disconnected, and fault information is recorded; the battery system continues to operate. Under normal battery system operation, when it is detected that the second battery cluster management unit 10 is operating normally while the first battery cluster management unit 9 is offline or faulty, the second battery cluster management unit 10 is switched to the main control unit, the first main negative contactor 3 and the first main positive contactor 5 controlled by the first battery cluster management unit 9 are disconnected, and fault information is recorded; the battery system continues to operate.

[0028] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An energy storage high voltage box, characterized in that, Comprising a first main negative contactor and a second main negative contactor, which are arranged in parallel between the negative electrode of the battery and the charge-discharge negative electrode; a first main positive contactor and a second main positive contactor, which are arranged in parallel between the positive electrode of the battery and the charge-discharge positive electrode; a first battery cluster management unit, which controls the on-off of the first main negative contactor and the first main positive contactor; a second battery cluster management unit, which controls the on-off of the second main negative contactor and the second main positive contactor; a molded case circuit breaker, which is arranged in the middle of the inner cavity bottom of the energy storage high-voltage box, and has a first end electrically connected to the first main positive contactor and the second main positive contactor, and a second end electrically connected to the first main negative contactor and the second main negative contactor; a fuse, which is arranged on the left side of the molded case circuit breaker, and has one end connected to the positive electrode of the battery cluster and the other end connected to the first main negative contactor and the second main negative contactor in parallel.

2. The energy storage high voltage box of claim 1, wherein, The first main negative contactor and the second main negative contactor are arranged above the fuse.

3. The energy storage high voltage box of claim 2, wherein, The first main positive contactor and the second main positive contactor are arranged obliquely above the first main negative contactor and the second main negative contactor.

4. The energy storage high voltage box of claim 1, wherein, A circulating current contactor and a circulating current resistor are further included, which are connected in series and in parallel to the first main positive contactor and the second main positive contactor.

5. The energy storage high voltage box of claim 4, wherein, The circulating current contactor and the circulating current resistor are arranged side by side at the top of the inner cavity of the energy storage high-voltage box.

6. The energy storage high voltage box of claim 1, wherein, The first battery cluster management unit and the second battery cluster management unit are arranged side by side above the right of the molded case circuit breaker.

7. The energy storage high voltage box of claim 1, wherein, When the first battery cluster management unit and the second battery cluster management unit are both working normally, the first battery cluster management unit controls the power-up, operation, power-down and protection cut-off of the battery cluster.

8. The energy storage high voltage box of claim 7, wherein, When the first battery cluster management unit works abnormally, the second battery cluster management unit issues an instruction to cut off the control authority of the first battery cluster management unit.

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