High-voltage control box for energy storage battery cluster system

Abstract

The utility model discloses a high-voltage control box for an energy storage battery cluster system, which belongs to the technical field of battery high-voltage control boxes, and comprises a box body assembly, an energy storage battery cluster system and an energy storage battery cluster system, the confluence switch area is arranged in the accommodating cavity; the confluence switch area comprises a total positive relay, a total negative relay and an isolating switch, and the isolating switch is connected with the total positive relay and the total negative relay respectively; the system also comprises a BMS control unit, and the BMS control unit can control the on-off of the main positive relay and the main negative relay. The BMS control unit comprises an upper-level communication module and a lower-level communication module, and the upper-level communication module and the lower-level communication module are used for communicating with an upper-level BMS and communicating with a lower-level BMS respectively. The BMS control unit integrates the direct current side on-off control function and the secondary communication control function, and improves the intelligentization and information interaction capability of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of battery high - voltage control boxes, and specifically, to a high - voltage control box for an energy - storage battery cluster system. Background Art

[0002] With the rapid development of the energy - storage industry, energy - storage products show a prosperous trend. At present, most energy - storage systems mainly consist of four parts: a PCS system, a battery system, a management and control system, and a background monitoring system. As the secondary control unit of industrial and commercial energy - storage battery clusters, the high - voltage box is commonly used in various occasions such as containers, outdoor cabinets, and indoors. As a key part of the energy - storage battery cluster system, the requirements for its high reliability, high integration, easy operation, and intelligent control are becoming more and more intense.

[0003] In the prior art, a Chinese patent document with the publication number CN221042641U discloses a high - voltage box for an energy - storage system, which relates to the technical field of energy - storage battery equipment. It includes a box body and an electrical mechanism. The box body is provided with a cavity for accommodating the electrical mechanism. The electrical mechanism includes a positive - pole circuit component, a negative - pole circuit component, and a protection component. The protection component includes a circuit breaker. The positive - pole circuit component and the negative - pole circuit component are respectively connected to the circuit breaker, and the circuit breaker is used to control the on - off of the current in the positive - pole circuit component and the on - off of the current in the negative - pole circuit component. This high - voltage box can improve the reliability of the product. However, it is lacking in intelligence and cannot achieve information interaction of the battery cluster system. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high - voltage control box for an energy - storage battery cluster system, which solves the problem that the high - voltage box in the prior art is lacking in intelligence and cannot achieve information interaction of the battery cluster system.

[0005] To achieve the above - mentioned purpose, the utility model provides a high - voltage control box for an energy - storage battery cluster system, which includes a box - body assembly with an accommodation cavity arranged inside; a bus - bar switch area arranged in the accommodation cavity. The bus - bar switch area includes a main - positive relay, a main - negative relay, and a disconnector. The disconnector is respectively connected to the main - positive relay and the main - negative relay. It also includes a BMS control unit, which can control the on - off of the main - positive relay and the main - negative relay. The BMS control unit includes upper - and lower - level communication modules, which are respectively used for communicating with the upper - level BMS and the lower - level BMS.

[0006] The BMS control unit can intelligently control the on / off of the main positive relay and the main negative relay, and can communicate with the upper and lower levels through the upper and lower communication modules to achieve secondary communication control. Compared with the prior art, the BMS control unit integrates the DC-side on / off control and secondary communication control functions, improving the intelligence and information interaction ability of the product.

[0007] Further, a main positive fuse and a main negative fuse are provided in the bus switch area. The main positive relay is connected to the main positive fuse, and the main positive fuse is electrically connected to the main positive interface; the main negative relay is connected to the main negative fuse, and the main negative fuse is electrically connected to the main negative interface.

[0008] The main positive fuse and the main negative fuse are protection units that can forcibly cut off the circuit in case of overload or short circuit in the battery cluster system, ensuring the safety of the battery cluster system.

[0009] Further, the main positive fuse is connected to the main positive interface through a main positive copper bar, and the main negative fuse is connected to the main negative interface through a main negative copper bar.

[0010] The main positive copper bar and the main negative copper bar, as conductive components, enable the current to flow, helping the main positive fuse and the main negative fuse to be respectively conducted with the main positive interface and the main negative interface.

[0011] Further, an interface panel is provided on one side of the box assembly. The main positive interface and the main negative interface are both provided on the interface panel. A switch handle is provided on the interface panel, and the disconnect switch is connected to the switch handle.

[0012] The main positive interface, the main negative interface, and the switch handle are all integrated on the interface panel, making the plug-in operation convenient and at the same time separating the high-voltage and low-voltage connectors to ensure electrical safety.

[0013] Further, a current sensor is connected to the main negative copper bar, and the current sensor is used to detect the current of the battery cluster system.

[0014] The current sensor is a detection device for the current of the battery cluster system, which can monitor the charge and discharge state of the system in real time and provide a basis for the calculation of the SOC.

[0015] Further, the disconnect switch is connected to the main negative copper bar through a conductive component.

[0016] The disconnect switch is connected to the main negative copper bar. The disconnect switch can control the on / off of the DC circuit and can play a reliable break point function during the maintenance and repair of this device.

[0017] Further, a pre-charge relay and a pre-charge resistor are provided in the accommodation cavity of the box assembly, and the pre-charge relay and the pre-charge resistor form a pre-charge circuit.

[0018] The pre-charge circuit serves to limit the charging current of the capacitor at the moment when the power supply is turned on, so as to protect the components of the rectifier from being damaged by the instantaneous short-circuit current of the capacitor.

[0019] Furthermore, a solenoid valve is arranged in the accommodation cavity, and the BMS control unit is electrically connected to the solenoid valve and controls the opening and closing of the solenoid valve.

[0020] The solenoid valve is mainly the control unit of the liquid cooling pipeline. The solenoid valve can control the opening and closing of the liquid cooling pipeline, and the BMS control unit can control the opening and closing of the solenoid valve, improving the intelligent control of the liquid cooling pipeline.

[0021] Furthermore, a change-over switch is arranged in the accommodation cavity for converting AC and DC power supplies.

[0022] The change-over switch can convert alternating current into direct current for the use of the DC circuit inside the box assembly.

[0023] Adopting the technical solution provided by the present utility model, compared with the existing well-known technologies, it has the following beneficial effects:

[0024] (1) For the high-voltage control box of the energy storage battery cluster system of the present utility model, various switches are integrated in the busbar switch area to form a DC circuit. The BMS control unit can intelligently control the on-off of the total positive relay and the total negative relay, and can communicate with the upper and lower levels through the upper and lower communication modules to achieve secondary communication control. Compared with the prior art, the BMS control unit integrates the DC side on-off control and the secondary communication control functions, improving the intelligence and information interaction ability of the product.

[0025] Obviously, the elements or features described in the above single embodiment can be used alone or in combination in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In the drawings, the dimensions and proportions do not represent the dimensions and proportions of the actual product. The drawings are merely illustrative, and for clarity, some non-essential elements or features are omitted.

[0027] Figure 1 is the internal structure schematic diagram of the high-voltage control box in the embodiment of the present utility model;

[0028] Figure 2 is the structure schematic diagram of the interface panel in the embodiment of the present utility model.

[0029] DESCRIPTION OF THE REFERENCE NUMERALS

[0030] 100. Box assembly; 110. BMS control unit; 120. Change-over switch; 130. Solenoid valve; 140. Pre-charge resistor; 141. Pre-charge relay; 150. Positive main fuse; 160. Positive main relay; 170. Negative main fuse; 180. Negative main relay; 190. Positive main copper bar; 191. Positive main interface; 200. Negative main copper bar; 201. Negative main interface; 210. Current sensor; 220. Isolating switch; 221. Switch handle; 230. Interface panel. Detailed implementation mode

[0031] Next, the present invention will be described in detail with reference to the accompanying drawings. What is described here is only the preferred implementation mode of the present invention. Those skilled in the art can think of other ways to implement the present invention on the basis of the preferred implementation mode, and other ways also fall within the scope of the present invention.

[0032] Embodiment

[0033] Refer to Figure 1 - Figure 2 , this embodiment provides a high-voltage control box for an energy storage battery cluster system, including a box assembly 100 with an accommodation cavity provided inside. A busbar switch area is provided in the accommodation cavity. The busbar switch area includes a positive main relay 160, a negative main relay 180 and an isolating switch 220, and the isolating switch 220 is respectively connected to the positive main relay 160 and the negative main relay 180. It also includes a BMS control unit 110, and the BMS control unit 110 can control the on-off of the positive main relay 160 and the negative main relay 180; the BMS control unit 110 includes upper and lower communication modules, and the upper and lower communication modules are respectively used for communicating with the upper-level BMS and the lower-level BMS. The BMS control unit 110 can intelligently control the on-off of the positive main relay 160 and the negative main relay 180, and can communicate with the upper and lower levels through the upper and lower communication modules to achieve secondary communication control. Compared with the prior art, the BMS control unit 110 integrates the functions of DC side on-off control and secondary communication control, improving the intelligence and information interaction ability of the product.

[0034] In one embodiment, as Figure 1 shown, a positive main fuse 150 and a negative main fuse 170 are provided in the busbar switch area. The positive main relay 160 is connected to the positive main fuse 150, and the positive main fuse 150 is electrically connected to the positive main interface 191. The negative main relay 180 is connected to the negative main fuse 170, and the negative main fuse 170 is electrically connected to the negative main interface 201. The positive main fuse 150 and the negative main fuse 170 are both protection units, which can forcibly cut off the circuit in the case of overload or short circuit of the battery cluster system to ensure the safety of the battery cluster system. The positive main interface 191 and the negative main interface 201 can facilitate the connection of the positive main fuse 150 and the negative main fuse 170 to the outside.

[0035] In the connection between the main positive fuse 150, the main negative fuse 170 and the main positive interface 191, the main negative interface 201, a conductive component is required, and the conductive component can be a cable, a conductive metal, etc. Specifically, in this embodiment, as Figure 1 shown, the main positive fuse 150 is connected to the main positive interface 191 through the main positive copper busbar 190, and the main negative fuse 170 is connected to the main negative interface 201 through the main negative copper busbar 200. The main positive copper busbar 190 and the main negative copper busbar 200, as conductive components, enable the current to flow, helping the main positive fuse 150 and the main negative fuse 170 to be respectively conducted with the main positive interface 191 and the main negative interface 201.

[0036] In one embodiment, as Figure 1 and Figure 2 shown, an interface panel 230 is provided on one side of the box assembly 100, and both the main positive interface 191 and the main negative interface 201 are provided on the interface panel 230. A switch handle 221 is provided on the interface panel 230, and the disconnect switch 220 is connected to the switch handle 221. The main positive interface 191, the main negative interface 201 and the switch handle 221 are all integrated on the interface panel 230, improving the interface integration degree of the electrical components of this device, enabling convenient plugging and unplugging operations, and at the same time, the high-voltage and low-voltage connectors can be separated to ensure electrical safety. It should be noted that interfaces of other electrical components are also provided on the interface panel 230, and all the electrical component interfaces are integrated on the interface panel 230 as much as possible.

[0037] Furthermore, a current sensor 210 is connected to the main negative copper busbar 200, and the current sensor 210 is used to detect the current of the battery cluster system. The current sensor 210, as a detection device for the current of the battery cluster system, can monitor the charge and discharge state of the system in real time and provide a basis for the calculation of the SOC. The disconnect switch 220 is connected to the main negative copper busbar 200 through a conductive component. The disconnect switch 220 can control the on and off of the DC circuit and can play a reliable break point function during the maintenance and repair of this device.

[0038] In one embodiment, a pre-charge relay 141 and a pre-charge resistor 140 are provided in the accommodation cavity of the box assembly 100, and the pre-charge relay 141 and the pre-charge resistor 140 form a pre-charge circuit. The pre-charge circuit can effectively protect the capacitor, the fuse, and the main positive DC contactor, and can limit the magnitude of the charging current of the capacitor when the power supply is turned on instantaneously, so as to protect the components of the rectifier from being damaged by the instantaneous short-circuit current of the capacitor.

[0039] In addition, as Figure 1As shown, a solenoid valve 130 is provided in the accommodation cavity. The BMS control unit 110 is electrically connected to the solenoid valve 130 and controls the opening and closing of the solenoid valve 130. The solenoid valve 130 is mainly the control unit of the liquid cooling pipeline. The solenoid valve 130 can control the opening and closing of the liquid cooling pipeline. The BMS control unit 110 can control the opening and closing of the solenoid valve 130 to improve the intelligent control of the liquid cooling pipeline. A changeover switch 120 is provided in the accommodation cavity for converting AC and DC power supplies. The changeover switch 120 can convert alternating current into direct current for the use of the DC circuit inside the box assembly 100.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] The protection scope of the present invention is only defined by the claims. Benefiting from the teachings of the present invention, those skilled in the art can easily recognize that alternative structures of the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to produce new embodiments, which also fall within the scope of the appended claims.

Claims

1. A high-voltage control box for an energy storage battery cluster system, comprising a box body assembly (100) with an accommodation cavity provided inside; a busbar switch area provided in the accommodation cavity; the busbar switch area includes a main positive relay (160), a main negative relay (180) and a disconnect switch (220), and the disconnect switch (220) is respectively connected to the main positive relay (160) and the main negative relay (180); It is characterized in that further comprising a BMS control unit (110), the BMS control unit (110) can control the on / off of the main positive relay (160) and the main negative relay (180); the BMS control unit (110) includes upper and lower communication modules, and the upper and lower communication modules are respectively used for communicating with the upper-level BMS and the lower-level BMS.

2. The high-voltage control box for an energy storage battery cluster system according to claim 1, characterized in that, A main positive fuse (150) and a main negative fuse (170) are provided in the busbar switch area, the main positive relay (160) is connected to the main positive fuse (150), and the main positive fuse (150) is electrically connected to the main positive interface (191); the main negative relay (180) is connected to the main negative fuse (170), and the main negative fuse (170) is electrically connected to the main negative interface (201).

3. The high-voltage control box for an energy storage battery cluster system according to claim 2, characterized in that, The main positive fuse (150) is connected to the main positive interface (191) through a main positive copper bar (190), and the main negative fuse (170) is connected to the main negative interface (201) through a main negative copper bar (200).

4. The high-voltage control box for an energy storage battery cluster system according to claim 3, characterized in that, An interface panel (230) is provided on one side of the box body assembly (100), and the main positive interface (191) and the main negative interface (201) are both provided on the interface panel (230).

5. The high-voltage control box for an energy storage battery cluster system according to claim 4, wherein, A switch handle (221) is provided on the interface panel (230), and the disconnect switch (220) is connected to the switch handle (221).

6. The high-voltage control box for an energy storage battery cluster system according to claim 3, wherein, A current sensor (210) is connected to the main negative copper bar (200), and the current sensor (210) is used to detect the current of the battery cluster system.

7. The high-voltage control box for an energy storage battery cluster system according to claim 3, characterized in that, The disconnect switch (220) is connected to the main negative copper bar (200) through a conductive member.

8. A high-voltage control box for an energy storage battery cluster system according to claim 1, characterized in that, A pre-charge relay (141) and a pre-charge resistor (140) are provided in the accommodation cavity of the box body assembly (100), and the pre-charge relay (141) and the pre-charge resistor (140) form a pre-charge circuit.

9. The high-voltage control box for an energy storage battery cluster system according to claim 1, characterized in that, An electromagnetic valve (130) is provided in the accommodation cavity, and the BMS control unit (110) is electrically connected to the electromagnetic valve (130) and controls the opening and closing of the electromagnetic valve (130).

10. The high-voltage control box for an energy storage battery cluster system according to claim 1, characterized in that, A change-over switch (120) is provided in the accommodation cavity for converting AC and DC power supplies.

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