High-voltage box and energy storage system

Abstract

The utility model discloses a high-voltage box and an energy storage system. The high-voltage box comprises a box body, a first power line terminal, a first convergence terminal, a second power line terminal, a second convergence terminal and two circuit assemblies. The first power line terminal, the first confluence terminal, the second power line terminal and the second confluence terminal are all arranged on a panel shell of the box body, and the first power line terminal comprises a first positive electrode interface and a first negative electrode interface. The first bus terminal includes a first positive bus terminal and a first negative bus terminal. The second power line terminal comprises a second positive electrode interface and a second negative electrode interface. The second bus terminal includes a second positive bus terminal and a second negative bus terminal. The two circuit assemblies are arranged in the box body and are respectively connected with the corresponding interfaces and the terminals. The two circuit assemblies in the high-voltage box are mutually independent and share one box body, so that the space is saved, and the high-voltage box is suitable for the arrangement structure design of a single-row two-cluster battery pack.

Description

A high-voltage box and energy storage system Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a high-voltage box and energy storage system. Background Technology

[0002] With the rapid development of energy storage systems, the demand for capacity density in energy storage containers is increasing, leading to the emergence of long-size battery packs. The use and management of long-size battery packs rely heavily on a Battery Management System (BMS). For a single row of eight long-size battery packs, due to voltage level limitations, four packs must be grouped together to meet the requirements of a DC 1500V energy storage system. Each pack group requires a high-voltage box for monitoring and management. This arrangement of eight long-size battery packs in a single row requires two high-voltage boxes. If these two boxes are arranged horizontally, their total extension length will exceed the width of the battery packs, resulting in at least one side extending beyond the high-voltage box, occupying extra space, hindering the arrangement of other high-voltage boxes, and reducing the space utilization of the container. Furthermore, using two high-voltage boxes necessitates daisy-chain communication between them, resulting in numerous wiring harnesses, a complex structure, and an impact on aesthetics. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a high-voltage box and energy storage system.

[0004] The present invention adopts the following technical solution:

[0005] The primary objective of this application is to provide a high-voltage box, comprising:

[0006] The box body has a panel shell;

[0007] The first power line terminal is disposed on the panel housing and includes a first positive terminal and a first negative terminal.

[0008] The first bus terminal is disposed on the panel housing and includes a first positive bus terminal and a first negative bus terminal.

[0009] The second power line terminal is disposed on the panel housing and includes a second positive terminal and a second negative terminal.

[0010] The second bus terminal is disposed on the panel housing, and the second bus terminal includes a second positive bus terminal and a second negative bus terminal;

[0011] Two circuit components are disposed within the housing. The input terminals of one circuit component are respectively connected to the first positive interface and the first negative interface, and the output terminals are respectively connected to the first positive bus terminal and the first negative bus terminal. The input terminals of the other circuit component are respectively connected to the second positive interface and the second negative interface, and the output terminals are respectively connected to the second positive bus terminal and the second negative bus terminal.

[0012] Optionally, the first power line terminal and the second power line terminal are disposed on one side of the panel housing along the length direction;

[0013] The first bus terminal and the second bus terminal are disposed on the other side of the panel housing along the length direction.

[0014] Optionally, the first negative terminal, the second negative terminal, the first positive terminal, and the second positive terminal are arranged sequentially along the width direction of the panel shell;

[0015] The wiring directions of the first positive interface, the first negative interface, the second positive interface, and the second negative interface are parallel to the length direction of the panel shell.

[0016] Optionally, the first positive interface, the first negative interface, the second positive interface, and the second negative interface are staggered along the length of the panel shell.

[0017] Optionally, the first negative bus terminal, the first positive bus terminal, the second positive bus terminal, and the second negative bus terminal are arranged sequentially along the length direction of the panel shell, and the wiring direction of the first positive bus terminal, the first negative bus terminal, the second positive bus terminal, and the second negative bus terminal is parallel to the width direction of the panel shell.

[0018] Optionally, the first positive bus terminal and the first negative bus terminal are staggered along the width direction of the panel housing, and the second positive bus terminal and the second negative bus terminal are staggered.

[0019] Optionally, both circuit components include a main control communication circuit, which includes a BMS module;

[0020] The main control communication circuits of the two circuit components are electrically connected;

[0021] Two inter-box communication terminals are provided on the panel housing;

[0022] The main control communication circuits of the two circuit components are respectively connected to the corresponding inter-box communication terminals.

[0023] A second objective of this application is to provide an energy storage system, comprising:

[0024] A cluster rack is provided with multiple rows of battery packs. Each row of battery packs includes a first cluster of battery packs and a second cluster of battery packs. Both the first cluster of battery packs and the second cluster of battery packs include multiple battery packs. The battery packs are arranged sequentially along the height direction of the cluster rack.

[0025] The high-voltage box described above is disposed on the cluster frame and located at the bottom of the corresponding column of battery packs. The first power line terminal of the high-voltage box is connected to the first cluster of battery packs in the corresponding column of battery packs via a power cable, and the second power line terminal of the high-voltage box is connected to the second cluster of battery packs in the corresponding column of battery packs via a power cable.

[0026] Optionally, the high-voltage box has two master-slave communication terminals on its panel housing. One of the master-slave communication terminals is connected to the master control communication circuit of one of the circuit components, and the other master-slave communication terminal is connected to the master control communication circuit of another of the circuit components.

[0027] One of the two master-slave communication terminals is connected to the first battery pack via a communication line, and the other is connected to the second battery pack via a communication line.

[0028] The power cable and the communication cable are located at opposite ends of the panel housing along its length.

[0029] Optionally, the two inter-box communication terminals on the high-voltage box are respectively connected to inter-box cables, and the two inter-box cables extend to both sides of the panel shell along the length direction to connect to the adjacent high-voltage boxes on both sides respectively.

[0030] By adopting the above technical solution, this application has the following beneficial effects:

[0031] In this application, both circuit components are housed within a casing and connected to their respective interfaces and terminals. The two circuit components within the high-voltage casing of this application are independent of each other, sharing a single casing, thus saving space and making it suitable for the layout design of a single-row, two-cluster battery pack.

[0032] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0034] Figure 1 shows a three-dimensional structural diagram of the power distribution combiner cabinet in the energy storage system provided in the embodiment of this application;

[0035] Figure 2 shows a schematic diagram of the bottom cabinet of the power combiner cabinet provided in the embodiment of this application;

[0036] Figure 3 shows a schematic diagram of the hidden part of the power distribution combiner cabinet provided in the embodiment of this application;

[0037] Figure 4 shows a schematic diagram of the internal structure of the top cabinet of the power distribution combiner cabinet provided in the embodiment of this application;

[0038] Figure 5 shows a schematic diagram of the structure of the molded case circuit breaker in the power distribution combiner cabinet provided in the embodiment of this application;

[0039] Figure 6 shows a schematic diagram of the internal circuit of the high-voltage box provided in an embodiment of this application;

[0040] Figure 7 shows a schematic diagram of the energy storage system provided in an embodiment of this application;

[0041] Figure 8 shows a schematic diagram of the layout of the battery system of the energy storage system provided in an embodiment of this application;

[0042] Figure 9 shows a front view of the high-voltage box in the energy storage system provided in the embodiment of this application;

[0043] Figure 10 shows a partial structural schematic diagram of the energy storage system provided in an embodiment of this application.

[0044] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0046] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] Example 1

[0049] As shown in Figures 1 to 10, this application embodiment provides a detailed description of the high-voltage box in the energy storage system. The high-voltage box is a two-in-one high-voltage box 33, comprising: a box body, a first power line terminal 331, a first bus terminal 333, a second power line terminal 332, a second bus terminal 334, and two circuit components 335. The box body has a panel shell. The first power line terminal 331 is disposed on the panel shell, and the first power line terminal 331 includes a first positive interface and a first negative interface. The first bus terminal 333 is disposed on the panel shell, and the first bus terminal 333 includes a first positive bus terminal and a first negative bus terminal. The second power line terminal 332 is disposed on the panel shell, and the second power line terminal 332 includes a second positive interface and a second negative interface. The second bus terminal 334 is disposed on the panel shell, and the second bus terminal 334 includes a second positive bus terminal and a second negative bus terminal. Both circuit components 335 are housed within the housing. The input terminals of one circuit component 335 are connected to the first positive interface and the first negative interface, respectively, and the output terminals are connected to the first positive bus terminal and the first negative bus terminal, respectively. The input terminals of the other circuit component 335 are connected to the second positive interface and the second negative interface, respectively, and the output terminals are connected to the second positive bus terminal and the second negative bus terminal, respectively.

[0050] It should be noted that in this embodiment, a circuit component 335 refers to all the circuits within a high-voltage box 33 in the prior art. This generally includes copper busbars, circuit breakers, shunts, maintenance switches 337, BMS, etc.

[0051] This application incorporates two circuit components 335 within a single housing, effectively integrating two high-voltage boxes 33 from the prior art into a single housing. The two circuit components 335 are independent, each connected to its respective battery pack 32 via corresponding power line terminals. Each is also connected to the power distribution cabinet 1 of the energy storage system via corresponding busbar terminals.

[0052] The two circuit components 335 inside the high-voltage box 33 of this application are independent of each other. The two circuit components 335 share a box body, and the width of the box body is no greater than the width of the battery pack 32 above, thereby saving space and making it suitable for the layout structure design of two battery packs 32 in a single row.

[0053] In some possible implementations, the first power line terminal and the second power line terminal are located on one side of the panel housing along its length, while the first bus terminal 333 and the second bus terminal 334 are located on the other side of the panel housing along its length. In this embodiment, the power line terminal being located solely on one side of the panel housing along its length allows for easy upward extension to the corresponding battery pack 32. The bus terminal being located on the other side of the panel housing facilitates cable routing to the power distribution junction box 1.

[0054] In some possible implementations, the first negative interface, the second negative interface, the first positive interface, and the second positive interface are arranged sequentially along the width direction of the panel housing, and the wiring directions of the first positive interface, the first negative interface, the second positive interface, and the second negative interface are parallel to the length direction of the panel housing. The heights of the first negative interface, the second negative interface, the first positive interface, and the second positive interface are staggered to avoid affecting their wiring.

[0055] In some possible implementations, the first positive interface, the first negative interface, the second positive interface, and the second negative interface are staggered along the length of the panel shell. That is, the first positive interface, the first negative interface, the second positive interface, and the second negative interface are not in the same longitudinal column, and their projections onto a plane perpendicular to the width of the panel shell are offset from each other and do not overlap. Each interface is relatively large, and this arrangement allows for the smooth placement of each interface within a relatively small space.

[0056] In some possible implementations, as shown in Figure 9, the first negative bus terminal, the first positive bus terminal, the second positive bus terminal, and the second negative bus terminal are arranged sequentially along the length of the panel housing, with each bus terminal horizontally staggered to facilitate wiring and avoid cross-interference of wiring below. The wiring direction of the first positive bus terminal, the first negative bus terminal, the second positive bus terminal, and the second negative bus terminal is parallel to the width direction of the panel housing. The cables connecting each bus terminal are led downwards and perpendicular to the terminals of the connection interface, facilitating extension to the bottom of the power distribution junction box 1, and further into the interior of the power distribution junction box 1.

[0057] In some possible implementations, the first positive bus terminal and the first negative bus terminal are staggered along the width direction of the panel housing, and the second positive bus terminal and the second negative bus terminal are also staggered. The bus terminals are relatively large; this structural design allows for the efficient arrangement of each bus terminal within a smaller planar space.

[0058] In some possible implementations, as shown in Figure 6, both circuit components 335 include a main control communication circuit, which includes a BMS module 3351. The main control communication circuits of the two circuit components 335 are electrically connected, and the two circuit components 335 are directly connected inside the housing, reducing wiring on the outside of the housing. Two inter-housing communication terminals 338 are provided on the panel housing, and the main control communication circuits of the two circuit components 335 are respectively connected to the corresponding inter-housing communication terminals 338. In the energy storage system, the inter-housing communication terminals 338 of two adjacent high-voltage boxes 33 are connected via inter-housing cables. Two master-slave communication terminals 336 are also provided at the bottom center of the panel housing, and are respectively connected to the corresponding circuit components 335. The master-slave communication terminals 336 are connected to the battery pack 32 via communication cables to acquire signals from the battery pack 32 and transmit them to the BMS.

[0059] As shown in Figure 8, this application also provides an energy storage system, including: a cluster frame 31 and the aforementioned high-voltage box 33. Multiple rows of battery packs 32 are arranged on the cluster frame 31. Each row of battery packs 32 includes a first cluster of battery packs and a second cluster of battery packs. Both the first and second clusters of battery packs 32 include multiple battery packs 32 (e.g., four battery packs 32), and each battery pack 32 is arranged sequentially along the height direction of the cluster frame 31. The high-voltage box 33 is disposed on the cluster frame 31 and located at the bottom of the corresponding row of battery packs 32. The first power line terminal 331 of the high-voltage box 33 is connected to the first cluster of battery packs 32 of the corresponding row of battery packs 32 via a power cable, and the second power line terminal 332 of the high-voltage box 33 is connected to the second cluster of battery packs 32 of the corresponding row of battery packs 32 via a power cable.

[0060] Two master-slave communication terminals 336 are provided on the panel of the high-voltage box 33. One master-slave communication terminal 336 is connected to the master control communication circuit of one circuit component 335, and the other master-slave communication terminal 336 is connected to the master control communication circuit of another circuit component 335. One of the two master-slave communication terminals 336 is connected to the first battery pack via a communication line, and the other is connected to the second battery pack via a communication line.

[0061] The power cable and the communication cable are located at both ends of the panel shell along the length direction and both extend upwards, thereby achieving isolation between strong and weak current cables and avoiding mutual signal interference between high-voltage and low-voltage cables.

[0062] Two inter-box communication terminals 338 on the high-voltage box 33 are respectively connected to inter-box cables. The two inter-box cables extend to both sides of the panel shell along the length direction to connect to the adjacent high-voltage boxes 33 on both sides respectively.

[0063] The high-voltage box 33 of this application adopts a space-saving design, with a width consistent with the battery pack 32, resulting in an aesthetically pleasing overall appearance. The main control communication circuit (BMS) of the two circuit components 335 in the high-voltage box 33 is internally wired, reducing external wiring. The high-voltage box 33 of this application features a rationally planned connector layout, separating strong and weak current signals, and clear wiring.

[0064] As shown in Figure 6, the high-voltage box 33 also includes a power supply circuit 3353, which is connected to two BMS modules 3351 respectively to supply power to the two BMS modules 3351. The power supply circuit 3353 is equipped with a 2P circuit breaker 3352 instead of two circuit breakers, which reduces the number of components and saves costs.

[0065] Example 2

[0066] Referring to Figures 1 and 10, this application embodiment provides an energy storage system, including: a housing 2, a battery system 3, a power distribution combiner cabinet 1, and two PCS devices 6. The battery system 3 is disposed within the housing 2. As shown in Figure 7, the battery system 3 includes two sets of battery packs 32, each set of battery packs 32 including multiple clusters of battery packs 32. In Figure 7, the first set of battery packs includes six clusters of battery packs: RACK01, RACK02, RACK03, RACK04, RACK05, and RACK06, with each cluster including four battery packs. The second set of battery packs includes six clusters of battery packs: RACK07, RACK08, RACK09, RACK10, RACK11, and RACK12, with each cluster including four battery packs. Every two clusters of battery packs are located in the same column on the cluster rack, and the two clusters of battery packs share a high-voltage box. A power distribution combiner cabinet 1 is installed in the enclosure 2 and includes two combiner circuits 16. The two combiner circuits 16 are independent of each other and are respectively connected to the respective battery packs 32 of the corresponding group, i.e., connected to the respective battery packs 32 through a high-voltage box. A disconnecting switch 161 and a fuse 162 are installed on each combiner circuit 16, and two PCS devices 6 are respectively connected to the corresponding combiner circuit 16.

[0067] The energy storage system of this application possesses the characteristics of a voltage source, effectively improving problems such as short-circuit capacity and lack of rotational inertia in novel power systems, and has significant application prospects in these systems. The energy storage system of this application incorporates isolating switches and fuses in the bus circuits to protect the DC side, avoiding over-reliance on AC side circuit breakers. The energy storage system of this application adopts a dual-stacking structure design, with each bus circuit 16 equipped with an isolating switch 161 and a fuse 162. Each stack operates independently, improving system stability and reliability, and facilitating compliance with the system's 3x overload condition for 10 seconds.

[0068] In some possible implementations, as shown in Figure 7, a DC surge protection bus circuit 163 is connected to each of the two bus circuits 16. The DC surge protection bus circuit 163 includes an SPD (Surge Protective Device). It can be used to protect energy storage systems from lightning surges and circuit surges caused by equipment start-up and shutdown, load changes, short-circuit faults, etc., within the power system, thus improving safety. In the bus circuits 16, the DC surge protection bus circuit 163 and the disconnecting switch 161 can be connected in parallel.

[0069] In some possible implementations, as shown in Figure 8, the battery system 3 includes a cluster frame 31, and each battery pack 32 includes several rows of battery packs 32 disposed on the cluster frame 31, with each row of battery packs 32 consisting of two clusters of battery packs 32. Figure 8 shows a row of battery packs, where the top four battery packs form one cluster of battery packs, and the bottom four battery packs form another cluster of battery packs.

[0070] For example, each column of battery packs 32 can have a total of eight battery packs 32, with the top four battery packs 32 forming one cluster and the bottom four battery packs 32 forming another cluster. These battery packs 32 can be large-sized liquid-cooled battery packs 32. Setting two clusters of battery packs 32 in the same column helps save space.

[0071] In some possible implementations, the energy storage system includes multiple high-voltage boxes 33, each mounted on a cluster frame 31 at the bottom of a corresponding row of battery packs 32. The input terminals of each high-voltage box 33 are connected to two battery packs 32 in the same row, and the output terminals are connected to corresponding bus circuits 16. Alternatively, only one high-voltage box 33 can be installed at the bottom of the eight battery packs 32, simplifying the structure by allowing one high-voltage box 33 to connect to two battery packs 32 respectively.

[0072] In some possible implementations, as shown in FIG9, the high voltage box 33 has a first power line terminal 331, a second power line terminal 332, a first bus terminal 333, and a second bus terminal 334. The first power line terminal 331 and the second power line terminal 332 are respectively connected to two battery packs 32 in the upper and lower sections of the same column via power cables. The first bus terminal 333 and the second bus terminal 334 are connected to the same bus circuit 16 via bus lines.

[0073] In some possible implementations, as shown in FIG9, the first power line terminal 331, the second power line terminal 332, the first bus terminal 333, and the second bus terminal 334 are all disposed on the panel shell of the high voltage box 33. The first power line terminal 331 and the second power line terminal 332 are located on one side of the panel shell along the length direction, and the first bus terminal 333 and the second bus terminal 334 are located on the other side of the panel shell along the length direction.

[0074] In some possible implementations, the power cable extends along the length of the panel housing on the side closest to the panel housing, and the busbar extends along the width of the panel housing on the side closest to the panel housing.

[0075] Optionally, the power distribution combiner cabinet 1 includes a bottom cabinet 11 and a top cabinet 12. The top cabinet 12 is located on top of the bottom cabinet 11, and an AC power distribution compartment 121 is provided inside the top cabinet 12. The bottom cabinet 11 has a DC combiner compartment 111, and two combiner circuits 16 are provided inside the DC combiner compartment 111. As shown in Figure 3, the DC combiner compartment 111 can be widened so that it can accommodate two combiner circuits 16. Isolating switches 161 on the two combiner circuits 16 are arranged sequentially along the width direction of the bottom cabinet 11.

[0076] The bottom cabinet 11 and the top cabinet 12 are connected and fixed by fasteners or by welding, making the entire power distribution combiner cabinet 1 an integral structure, which facilitates its integrated assembly into the container of the energy storage system.

[0077] Example 3

[0078] As shown in Figures 1 to 10, this embodiment of the application provides a detailed description of the power distribution combiner cabinet 1, which includes a bottom cabinet 11 and a top cabinet 12. The bottom cabinet 11 has a DC combiner chamber 111, within which a combiner circuit 16 is installed. The combiner circuit 16 is used to connect the power cables extending from one side of the battery pack 32 in the energy storage system. The top cabinet 12 is located on top of the bottom cabinet 11, and its width is smaller than that of the bottom cabinet 11. The top cabinet 12 has an AC distribution chamber 121, within which an auxiliary power distribution circuit 17 is installed. The auxiliary power distribution circuit 17 mainly includes signal lines and an AC power supply circuit, which supplies power to AC electrical equipment in the energy storage system. For example, it supplies power to water-cooled units 5, temperature control components (air conditioners, fans), BMS, and other equipment.

[0079] The energy storage system of this application has a large battery capacity, requiring a larger disconnect switch 161 within the combiner circuit 16, as well as to accommodate copper busbars and fuses 162. Therefore, the size of the bottom cabinet 11 is difficult to reduce. The top cabinet 12 houses the auxiliary power distribution circuit 17 and some signal lines. The auxiliary power distribution circuit 17 mainly includes AC power distribution components; although numerous, these components are smaller than the disconnect switch 161 and copper busbars in the DC combiner compartment 111. Therefore, the width of the top cabinet 12 can be reduced. By appropriately adjusting the cabinet height, the layout of the auxiliary power distribution circuit 17 can be accommodated. The top cabinet 12 can be appropriately reduced in size (width), minimizing its footprint within the energy storage system enclosure 2. The power distribution combiner cabinet 1 of this application is approximately L-shaped. After assembly into the enclosure 2, a portion of space is left on the side of the top cabinet 12 to accommodate other structural components of the energy storage system, fully utilizing the internal space of the enclosure 2.

[0080] In some possible implementations, as shown in Figure 1, the top cabinet 12 is supported on top of the bottom cabinet 11 and located on one side of the bottom cabinet 11, forming a receiving space 13 between the top cabinet 12 and the bottom cabinet 11 for accommodating the fire-fighting equipment 4. If the top cabinet 12 is centrally located, smaller receiving spaces 13 will be formed on both sides, making them difficult to utilize efficiently. In this embodiment, by placing the top cabinet 12 on one side of the bottom cabinet 11 along its width, a larger receiving space 13 is formed only on one side of the top cabinet 12, as shown in Figure 10, which facilitates the installation of the fire-fighting equipment 4 of the energy storage system. The fire-fighting equipment 4 is typically a tall gas cylinder structure, which can be vertically installed on one side of the top cabinet 12, supported by the bottom cabinet 11. The L-shaped power distribution junction box 1 is narrower at the top and wider at the bottom, with the extra space used to place the fire-fighting equipment 4, such as fire-fighting gas cylinders and other fire-fighting equipment 4, solving the problem of small electrical compartment space, numerous devices, and difficult structural layout.

[0081] In some possible implementations, as shown in Figures 1 and 2, a fire pipe arrangement cavity 112 is formed on the bottom frame, the fire pipe arrangement cavity 112 extends along the height direction of the bottom cabinet 11, and the fire pipe arrangement cavity 112 connects to the receiving space 13.

[0082] The fire-fighting gas cylinders need to be connected to fire-fighting pipelines, which are then extended to the battery pack side of the energy storage system. A fire-fighting pipeline routing cavity 112 is provided on the bottom frame to facilitate the routing of the fire-fighting pipelines. The top of the fire-fighting pipeline routing cavity 112 directly connects to the receiving space 13, allowing the fire-fighting pipelines connected to the fire-fighting gas cylinders to extend smoothly downwards. The cabinet structure of the power distribution junction box 1 will not interfere with the installation of the fire-fighting pipelines.

[0083] The fire pipeline arrangement cavity 112 can be set at a corner of the bottom cabinet 11 away from the top cabinet 12, so as not to affect the support of the fire gas cylinder on the top of the top cabinet 12, and also to facilitate the fire pipeline to extend downward along the fire pipeline arrangement cavity 112.

[0084] In some possible implementations, as shown in Figure 2, the bottom frame includes five columns, each of which is arranged sequentially along the circumference. Two adjacent columns in the circumference are connected by beams. Each beam includes a straight beam and a right-angle beam 113. Among the five columns, only the beam between two columns is a right-angle beam 113. The right-angle beam 113 and the columns on both sides form the fire-fighting pipeline arrangement cavity 112.

[0085] The right-angle beam 113 is roughly L-shaped. The fire pipe arrangement cavity 112 can be formed between the right-angle beam 113 and the columns on both sides. The fire pipe arrangement cavity 112 is a recessed groove formed on one edge of the surface of the bottom cabinet 11. The structure is simple and convenient for laying fire pipes.

[0086] In some possible implementations, as shown in Figure 1, the power distribution combiner cabinet 1 includes several long columns, multiple first short columns 115, and multiple second short columns 122, with the second short columns 122 positioned higher than the first short columns 115. Each of the long columns has a top section 114 and a bottom section 1120, which are integrally formed. Each bottom section 1120 and each first short column 115 respectively form the edges of the bottom cabinet 11, and each top section 114 and each second short column 122 respectively form the edges of the top cabinet 12. In this application, the bottom cabinet 11 and the top cabinet 12 of the power distribution combiner cabinet 1 share several long columns, making the entire power distribution combiner cabinet 1 a single integrated structure with high structural strength and good structural stability. Each long column is located on one side of the top cabinet 12 and the bottom cabinet 11, and the accommodating space 13 is located on the side of the top cabinet 12 away from the long columns. In this application, because the top cabinet 12 needs to be set on one side of the bottom cabinet 11, rather than in the middle, the long columns can be shared by the edges of the bottom cabinet 11 and the side of the bottom cabinet 11 that is aligned with it.

[0087] In some possible implementations, the power distribution junction box 1 includes an isolation plate 14 and a support plate 15, both of which are disposed on the top of the bottom cabinet 11. The isolation plate 14 separates the DC junction room 111 and the AC power distribution room 121. The support plate 15 is located on one side of the top cabinet 12 and is used to support the fire-fighting equipment 4. The supporting plate 15 and the top cabinet 12 form the receiving space 13.

[0088] The isolation plate 14 is used to separate the DC combiner room 111 from the AC distribution room 121. The support plate 15 is exposed on the outside of the distribution combiner cabinet 1 and is used to support the fire-fighting gas cylinder. The thickness of the support plate 15 can be greater than that of the isolation plate 14, resulting in higher structural strength, less deformation, and stable support for the fire-fighting gas cylinder.

[0089] In some possible implementations, a side frame is provided on the side of the top cabinet 12 near the receiving space 13. The side frame includes two second short columns 122 and a bottom beam 123 connecting the two second short columns 122. The upper surface of the bottom beam 123 and the upper surface of the support plate 15 are located in the same plane, and the receiving space 13 is formed between the side frame and the support plate 15. By making the upper surfaces of the support plate 15 and the bottom beam 123 flush, it is beneficial to increase the receiving space 13, which can easily accommodate larger fire-fighting gas cylinders and other structural components.

[0090] In some possible implementations, the side frame includes a baffle 124 located on one side of the inner surface of the two second short columns 122, forming the receiving space 13 between the support plate 15, the bottom beam 123, and the baffle 124. By placing the baffle 124 on the side of the second short columns 122 away from the receiving space 13, the receiving space 13 is increased, facilitating the installation of fire-fighting equipment 4.

[0091] A small space is formed between the second short column 122 and the baffle 124. A document holder can be installed in this space for convenient document storage. The document holder is at least partially located between the second short columns 122 to minimize the space occupied by the document holder 13 and to avoid interfering with the installation of the fire-fighting equipment 4.

[0092] In some possible implementations, the bottom cabinet 11 includes: a main cabinet, a protective panel 116, a mounting plate 117, and an operating handle 118. The main cabinet has the DC combiner chamber 111 and a front opening communicating with the DC combiner chamber 111. The combiner circuit 16 is disposed in the DC combiner chamber 111, and the combiner circuit 16 includes a disconnect switch 161. The protective panel 116 is connected to the main cabinet and covers the front opening. The mounting plate 117 is connected to the main cabinet and is located outside the protective panel 116. The operating handle 118 is rotatably disposed on the mounting plate 117, and the operating handle 118 extends into the DC combiner chamber 111 and engages with the disconnect switch 161.

[0093] The main cabinet includes several short uprights 115 and some long uprights, etc. In this application, considering the safety of operation and maintenance personnel, a protective plate 116 is placed over the front opening of the bottom cabinet 11 to shield the isolating switch 161, thus improving safety. Simultaneously, in this application, the isolating switch 161, which requires manual operation, is positioned on the front, with the operating handle 118 located outside the protective plate 116, improving safety and facilitating operation by the staff.

[0094] This application embodiment also provides an energy storage system, as shown in FIG10, including: a box 2, a battery system 3 and the aforementioned power distribution junction box 1. The battery system 3 is disposed in the box 2, the power distribution junction box 1 is disposed inside the box 2, and the fire-fighting equipment 4 is supported on the top of the bottom cabinet 11 and located on one side of the top cabinet 12.

[0095] Example 4

[0096] Referring to Figures 1 to 9, this application embodiment provides a detailed description of a power distribution combiner cabinet 1, which includes: a cabinet body, a protective plate 116, a mounting plate 117, a combiner circuit 16, and an operating handle 118. The cabinet body has an AC distribution compartment 121, a DC combiner compartment 111, and a front opening communicating with the DC combiner compartment 111. One side of the front opening is the operator's operating or maintenance room, facing the operator. The protective plate 116 is connected to the cabinet body, located on the surface of the cabinet body, and covers the front opening. The mounting plate 117 is connected to the cabinet body and located outside the protective plate 116. The combiner circuit 16 is disposed in the DC combiner compartment 111, and the combiner circuit 16 includes a disconnect switch 161. The operating handle 118 is rotatably disposed on the mounting plate 117, extending into the DC combiner compartment 111 and engaging with the disconnect switch 161. The operating handle 118 is mounted on the mounting plate 117 and does not require a structure for easy disassembly; it can be permanently mounted on the mounting plate 117.

[0097] The operating handle 118 of the power distribution combiner cabinet 1 of this application is located on the outside of the protective plate 116, and the operating handle 118 and the disconnect switch 161 maintain a transmission connection. It is not necessary to disassemble the protective plate 116. The operating handle 118 can be rotated directly on the outside of the protective plate 116, which makes operation and maintenance convenient and improves safety.

[0098] In some possible implementations, as shown in Figure 6, the operating handle 118 includes a fixed base, a rotary handle, and a drive shaft. The fixed base is fixed to the mounting plate 117, the rotary handle is rotatably connected to the fixed base, and both ends of the drive shaft are connected to the rotary handle and the disconnect switch 161, respectively. The fixed base can be fixed to the mounting plate 117 by fasteners such as bolts. The rotary handle is rotatably mounted on the fixed base. The rotary handle has a slot, which is not a round hole. The end of the drive shaft is inserted into the slot, and rotating the rotary handle drives the drive shaft to rotate, thereby adjusting the state of the disconnect switch 161.

[0099] In some possible implementations, the cabinet includes a top cabinet 12 and a bottom cabinet 11. The top cabinet 12 is located on top of the bottom cabinet 11. An AC power distribution room 121 is provided inside the top cabinet 12. The bottom cabinet 11 has a DC combiner room 111. A protective plate 116 is provided on the bottom cabinet 11. A low-voltage cable tray 119 is provided on the bottom cabinet 11, and the low-voltage cable tray 119 is located outside the protective plate 116.

[0100] By providing a low-voltage cable tray 119 on the outside of the protective plate 116, it is convenient to lay cables without removing the protective plate 116. Furthermore, the protective plate 116 isolates the low-voltage lines from the high-voltage circuits within the DC combiner chamber 111, preventing signal interference.

[0101] In some possible implementations, as shown in Figure 6, the bus circuit 16 includes a fuse 162, which is connected in series with the disconnecting switch 161. By adding a fuse 162 to the bus circuit 16, the functions of the disconnecting switch 161 and the fuse 162 are combined, enabling both circuit isolation and rapid current interruption in case of overload or short circuit faults, protecting other equipment in the circuit from damage.

[0102] Example 5

[0103] As shown in Figures 1 to 9, this application embodiment provides a detailed description of a power distribution combiner cabinet, which includes: a cabinet body, an AC main input protection device 171, multiple micro-break switches 172, and multiple adapter terminals 173. The cabinet body has a back frame 126 and two side frames 127. The two side frames 127 are respectively disposed on both sides of the back frame 126, and the side frames 127 are connected to the back frame 126. An AC power distribution compartment 121 is formed between the back frame 126 and the two side frames 127. The AC main input protection device 171 is disposed in the AC power distribution compartment 121 and connected to the back frame 126. Each of the micro-break switches 172 is located in the AC power distribution compartment 121 and connected to the back frame 126. Each of the micro-break switches 172 is respectively connected to the AC main input protection device 171. Each of the aforementioned adapter terminals 173 is located within the AC power distribution room 121. The adapter terminals 173 are disposed on the side frame 127, and at least some of the adapter terminals 173 are respectively connected to the corresponding micro-break switches 172.

[0104] The power distribution junction box 1 of this application has a pre-installed adapter terminal 173 on the side frame 127 for easy wiring, and the adapter terminal 173 is pre-connected to the corresponding micro-break switch 172. When wiring at the box factory or on site, it is only necessary to connect the cable extending to the side frame 127 to the corresponding adapter terminal 173. There is no need to bend the cable and extend it to the back side frame 126 of the cabinet. The wiring path is reduced, the wiring difficulty is reduced, and the wiring efficiency is improved.

[0105] In some possible implementations, the various transition terminals 173 are arranged sequentially along the height of the cabinet. This allows for a large number of transition terminals 173 to be arranged on the side frame 127. During cabinet assembly at the factory, when there is minimal interference within the cabinet, the various micro-break switches 172 located on the inner wall of the rear side frame 126 of the cabinet can be directly connected to the various transition terminals 173 on the side frame 127 via cables. During subsequent wiring integration at the cabinet factory or in the field, it is unnecessary to disassemble the cable trays, reducing workload and lowering the risk of cable breakage.

[0106] In some possible implementations, the AC main input protection device 171 includes a molded case circuit breaker 1711. Each of the adapter terminals 173 includes a power input terminal and multiple output terminals. The power input terminal is electrically connected to the molded case circuit breaker 1711 via a cable, and each of the output terminals is electrically connected to a corresponding miniature circuit breaker 172 via a cable. The power input terminal is used to connect to external AC power to supply stable AC power to the power distribution junction box 1, powering the water-cooled main unit, BMS, air conditioner, fan, and other electrical devices in the energy storage system. The molded case circuit breaker 1711 is used to protect the input AC power and output power to each miniature circuit breaker. Each miniature circuit breaker then supplies power to the corresponding electrical device through its respective adapter terminal.

[0107] It should be noted that the adapter terminal 173 is provided with a part that facilitates electrical connection for maintenance devices. Compared with direct cable connection to the microsegment switch, this application also facilitates circuit maintenance by arranging a large number of adapter terminals 173 on the side frame 127.

[0108] In some possible implementations, as shown in FIG9, the molded case circuit breaker 1711 includes a circuit breaker body and a plurality of copper busbars 17111. The circuit breaker body is provided with a plurality of grooves, and the copper busbars 17111 are disposed on the circuit breaker body. Part of the copper busbars 17111 are located inside the corresponding grooves, and part of them extend out of the grooves.

[0109] A single copper busbar 17111 typically requires the connection of three cables. However, the limited space within the recess makes proper connection difficult. A common practice is to add a junction box; however, an overly large junction box exacerbates congestion in the power distribution unit, increasing the risk of poor contact and breakdown. In some possible implementations, each copper busbar 17111 has several cables connected to both sides along its thickness. In this application, the copper busbar 17111 extends slightly beyond the recess, allowing for wiring from both sides, significantly reducing the risk of poor contact and eliminating the need for additional space, thus avoiding further congestion.

[0110] In some possible implementations, as shown in FIG4, an opening is formed between the two side frames 127 to connect the AC power distribution room 121. A reserved wiring groove 18 is provided on the side frame 127 between each of the adapter terminals 173 and the opening. The reserved wiring groove 18 extends along the height direction of the cabinet, and each of the adapter terminals 173 is arranged sequentially along the reserved wiring groove 18.

[0111] In this embodiment, the adapter terminals 173 are all located on the side frame 127 for easy wiring. The side frame 127 is also equipped with a separate external cable tray. When the box manufacturer and the field are integrating, they only need to open the cover of the reserved cable tray 18, which reduces the risk of tooth breakage.

[0112] In some possible implementations, as shown in Figure 4, the power distribution switch 1 includes a grounding busbar 125, which is located within the AC power distribution room 121. Since the AC power distribution room 121 has many devices that need to be connected to the grounding busbar 125, placing the grounding busbar within the AC power distribution room 121 facilitates the wiring of these devices.

[0113] In some possible implementations, the grounding busbar 125 is disposed on the side frame 127, and the grounding busbar 125 and the corresponding adapter terminals 173 on the side frame 127 are arranged sequentially in a straight line. Taking the power supply cable of the water-cooled unit 5 as an example, the bottom of the cabinet is the junction box, and the top is the AC distribution room 121. The power supply cable extends upward from the bottom of the distribution junction box 1, passes through the outside of the junction box of the bottom cabinet, and then enters the distribution room. There are wire bundles in the power supply cable that need to be connected to the grounding busbar 125. If the grounding busbar 125 is disposed on the bottom side of the cabinet, the outer layer of the power supply cable needs to be stripped in advance, exposing the internal wire bundles, which can easily cause cable redundancy and mess. In this embodiment, by disposing the grounding busbar 125 in the top AC distribution room 121, it is only necessary to strip the outer layer of the cable segment entering the AC distribution room 121, thus shortening the stripping length of the multi-core wire.

[0114] In some possible implementations, as shown in Figure 4, the power distribution switch 1 includes a backup power switch 174, which may be located in the AC power distribution room 121. The backup power switch 174 is connected in parallel with the molded case circuit breaker 1711 of the AC main input protection device 171. Each of the transfer terminals 173 includes a backup power terminal, which is connected to the backup power switch 174 via a cable. The backup power supply is used to provide power in the event of a mains power failure, ensuring stable operation of the equipment.

[0115] The energy storage system of this application includes: a housing 2, multiple battery packs 32, multiple AC power devices, and the aforementioned power distribution junction box 1. Each battery pack 32 is disposed within the housing 2, and at least some of the AC power devices are disposed within the housing 2. The power distribution junction box 1 is disposed within the housing 2, and the cables connecting the AC power devices (or AC electrical equipment) extend into the AC power distribution room 121 and are connected to corresponding adapter terminals 173 to obtain power.

[0116] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-voltage box, characterized in that, include: The enclosure includes a housing with a panel shell; a first power line terminal disposed on the panel shell, the first power line terminal including a first positive interface and a first negative interface; a first bus terminal disposed on the panel shell, the first bus terminal including a first positive bus terminal and a first negative bus terminal; a second power line terminal disposed on the panel shell, the second power line terminal including a second positive interface and a second negative interface; a second bus terminal disposed on the panel shell, the second bus terminal including a second positive bus terminal and a second negative bus terminal; and two circuit components disposed within the enclosure, one circuit component having its input terminal connected to the first positive interface and the first negative interface, and its output terminal connected to the first positive bus terminal and the first negative bus terminal, and the other circuit component having its input terminal connected to the second positive interface and the second negative interface, and its output terminal connected to the second positive bus terminal and the second negative bus terminal.

2. The high-voltage box according to claim 1, characterized in that, The first power line terminal and the second power line terminal are disposed on one side of the panel shell along the length direction; the first bus terminal and the second bus terminal are disposed on the other side of the panel shell along the length direction.

3. The high-voltage box according to claim 1, characterized in that, The first negative terminal, the second negative terminal, the first positive terminal, and the second positive terminal are arranged sequentially along the width direction of the panel shell; the wiring direction of the first positive terminal, the first negative terminal, the second positive terminal, and the second negative terminal is parallel to the length direction of the panel shell.

4. The high-voltage box according to claim 3, characterized in that, The first positive terminal, the first negative terminal, the second positive terminal, and the second negative terminal are staggered along the length of the panel shell.

5. The high-voltage box according to claim 1, characterized in that, The first negative bus terminal, the first positive bus terminal, the second positive bus terminal, and the second negative bus terminal are arranged sequentially along the length of the panel shell, and the wiring directions of the first positive bus terminal, the first negative bus terminal, the second positive bus terminal, and the second negative bus terminal are parallel to the width direction of the panel shell.

6. The high-voltage box according to claim 5, characterized in that, Along the width direction of the panel shell, the first positive bus terminal and the first negative bus terminal are misaligned, and the second positive bus terminal and the second negative bus terminal are also misaligned.

7. The high-voltage box according to claim 1, characterized in that, Both circuit components include a main control communication circuit, which includes a BMS module; the main control communication circuits of the two circuit components are electrically connected; two inter-box communication terminals are provided on the panel housing; the main control communication circuits of the two circuit components are respectively connected to the corresponding inter-box communication terminals.

8. An energy storage system, characterized in that, include: A battery pack rack is provided with multiple rows of battery packs, each row of battery packs including a first cluster of battery packs and a second cluster of battery packs. Both the first cluster of battery packs and the second cluster of battery packs include multiple battery packs, and each battery pack is arranged sequentially along the height direction of the rack. A high-voltage box is provided as described in any one of claims 1-7, wherein the high-voltage box is disposed on the rack and located at the bottom of the corresponding row of battery packs. The first power line terminal of the high-voltage box is connected to the first cluster of battery packs in the corresponding row of battery packs via a power cable, and the second power line terminal of the high-voltage box is connected to the second cluster of battery packs in the corresponding row of battery packs via a power cable.

9. The energy storage system according to claim 8, characterized in that, Two master-slave communication terminals are provided on the panel shell of the high-voltage box. One of the master-slave communication terminals is connected to the master control communication circuit of one of the circuit components, and the other master-slave communication terminal is connected to the master control communication circuit of another circuit component. One of the two master-slave communication terminals is connected to the first battery pack through a communication line, and the other is connected to the second battery pack through a communication line. The power cable and the communication line are respectively located at both ends of the panel shell along the length direction.

10. The energy storage system according to claim 8, characterized in that, The two inter-box communication terminals on the high-voltage box are respectively connected to inter-box cables. The two inter-box cables extend to both sides of the panel shell along the length direction to connect to the adjacent high-voltage boxes on both sides.

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