Energy storage system

Abstract

The utility model provides an energy storage system. The energy storage system comprises a battery bin, a plurality of battery clusters contained in the battery bin and a control cabinet arranged outside the battery bin. The control cabinet comprises a cabinet body, a busbar assembly and a plurality of high-voltage boxes, and the busbar and the plurality of high-voltage boxes are integrated in the cabinet body; and the plurality of high-voltage boxes are connected with the plurality of battery clusters in a one-to-one correspondence manner and are connected with the confluence assembly. As the plurality of high-voltage boxes do not occupy the space of the battery compartment, more battery clusters can be placed in the battery compartment, so that the capacity of the energy storage system is increased, the plurality of high-voltage boxes and the confluence assembly are integrated in the cabinet body to form the control cabinet, the control cabinet has the functions of the high-voltage boxes and the confluence assembly at the same time, the layout is more compact, and the occupied space is smaller; the size of the energy storage system can be reduced; the control cabinet is arranged outside the battery compartment, so that the control cabinet and the battery compartment can be separately mounted, and the energy storage system has higher mounting environment adaptability. Therefore, the energy storage system is small in size, large in capacity and high in installation environment adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, more particularly, to an energy storage system. BACKGROUND

[0002] The conventional energy storage system includes a plurality of battery clusters, a plurality of high-voltage boxes and a busbar cabinet. The plurality of high-voltage boxes and the plurality of battery clusters are arranged in a battery compartment. The plurality of high-voltage boxes and the plurality of battery clusters are connected and cooperate with the busbar cabinet to protect the plurality of battery clusters.

[0003] However, as the market demand for large-capacity energy storage systems is increasing, the volume of battery packs in the battery cluster is getting larger and larger, and the number of battery clusters is also increasing, which leads to the increasing volume of the energy storage system, and the application space of the energy storage system is limited. Therefore, how to reduce the volume while improving the capacity of the energy storage system becomes a problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiment of the present application is to provide an energy storage system with smaller volume and larger capacity.

[0005] An energy storage system comprises:

[0006] a battery compartment;

[0007] a plurality of battery clusters accommodated in the battery compartment; and

[0008] a control cabinet externally arranged in the battery compartment; the control cabinet comprises a cabinet body, a busbar assembly and a plurality of high-voltage boxes, the busbar assembly and the plurality of high-voltage boxes are integrated in the cabinet body; the plurality of high-voltage boxes are connected with the plurality of battery clusters one by one, and are connected with the busbar assembly.

[0009] In one of the embodiments, the cabinet body comprises a frame, a support and a surrounding plate; the surrounding plate is installed on the frame and encloses an installation space; the support is located in the installation space and is fixedly connected to the frame, and the plurality of high-voltage boxes are installed on the support in a vertical direction.

[0010] In one of the embodiments, the control cabinet comprises a low-voltage distribution box, the low-voltage distribution box is installed on the support, and the high-voltage box at the lowest position in the plurality of high-voltage boxes is located above the low-voltage distribution box.

[0011] In one of the embodiments, the enclosure includes a plurality of side plates, the plurality of side plates correspondingly surround the plurality of high-voltage boxes, the support and the two side plates located at opposite sides of the plurality of high-voltage boxes are respectively provided with a first installation space and a second installation space, the busbar assembly is located in the first installation space, the high-voltage cable connected with the high-voltage box and the low-voltage cable connected with the low-voltage distribution box are located in the second installation space.

[0012] In one of the embodiments, the side plate corresponding to the second installation space is provided with a first binding structure, the first binding structure is used for binding the high-voltage cable; the support corresponding to the second installation space is provided with a second binding structure, the second binding structure is used for binding the low-voltage cable.

[0013] In one of the embodiments, the enclosure includes a bottom plate located at a side of the low-voltage distribution box away from the high-voltage box, the bottom plate is provided with a wire hole, the high-voltage cable and the low-voltage cable pass through the wire hole.

[0014] In one of the embodiments, the energy storage system includes a cooling fan, the two side plates corresponding to the first installation space and the second installation space are both provided with the cooling fan, the cooling fan corresponds to or is higher than the high-voltage box at the highest position in the plurality of high-voltage boxes.

[0015] In one of the embodiments, the busbar assembly includes a main positive busbar and a main negative busbar, the positive output terminals of the plurality of high-voltage boxes are connected with the main positive busbar, and the negative output terminals of the plurality of high-voltage boxes are connected with the main negative busbar.

[0016] In one of the embodiments, the main positive busbar and the main negative busbar are arranged in a spaced manner; and / or, the enclosure includes a plurality of side plates, the plurality of side plates correspondingly surround the plurality of high-voltage boxes, the main positive busbar is located between the side plate and the support and arranged in a spaced manner with the side plate and the support, and the main negative busbar is located between the side plate and the support and arranged in a spaced manner with the side plate and the support.

[0017] In one of the embodiments, the busbar assembly includes a main positive transfer bar, a main negative transfer bar and a circuit breaker, the main positive transfer bar is connected between the main positive busbar and a positive incoming line port of the circuit breaker, and the main negative transfer bar is connected between the main negative busbar and a negative incoming line port of the circuit breaker.

[0018] In the energy storage system provided in this application embodiment, since multiple high-voltage boxes are externally located in the battery compartment, the space originally used for multiple high-voltage boxes can be used to accommodate more battery clusters, thereby increasing the capacity of the energy storage system. Furthermore, the multiple high-voltage boxes removed from the battery compartment are integrated with the busbar assembly into a control cabinet, thus the control cabinet simultaneously functions as both high-voltage boxes and busbar assemblies. Compared to conventional solutions that separate the high-voltage boxes and busbar assemblies, the connection structure between the high-voltage boxes and busbar assemblies in this application's control cabinet is simpler, and their layout is more compact, resulting in a smaller overall footprint and contributing to a smaller energy storage system size. Moreover, integrating multiple high-voltage boxes and busbar assemblies into the cabinet facilitates centralized management of both, reducing manpower and material costs during maintenance. Furthermore, since the control cabinet is externally located in the battery compartment, the two can be separated, allowing their installation positions to be adjusted according to the shape and size of the installation environment, thus enhancing the energy storage system's environmental adaptability. In summary, the energy storage system of this application can have a large capacity in a small size, has strong environmental adaptability, and can also reduce maintenance costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the external structure of the control cabinet in the energy storage system provided in the embodiments of this application;

[0021] Figure 2 for Figure 1 The front view of the control cabinet shown is omitted after the front and left side panels are removed.

[0022] Figure 3 for Figure 2 A three-dimensional structural diagram of the structure shown from one perspective;

[0023] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0024] Figure 5 for Figure 2 Left view of the structure shown;

[0025] Figure 6 for Figure 2 A three-dimensional structural diagram of the structure shown from another perspective;

[0026] Figure 7 For Figure 6 An enlarged schematic view of the structure at B in the middle;

[0027] In the drawings, each of the following reference signs represents:

[0028] 10, control cabinet; 100, cabinet body; 110, frame; 120, support; 130, coaming; 131, bottom plate; 131a, wire hole; 132, top plate; 133, side plate; 133a, front side plate; 133b, rear side plate; 133c, left side plate; 133d, right side plate; 140, support leg; 150, first mounting space; 160, second mounting space; 200, high-voltage box; 300, busbar assembly; 310, main positive busbar; 320, main negative busbar; 330, main positive transfer bar; 340, main negative transfer bar; 350, circuit breaker; 351, positive incoming line port; 352, negative incoming line port; 400, low-voltage distribution box; 500, high-voltage cable; 600, cooling fan. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, and not to limit the present application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0033] Please refer to Figures 1 to 7 The energy storage system provided by the embodiment of the present application will be described. The energy storage system comprises a control cabinet 10, a battery compartment (not shown) and a plurality of battery clusters (not shown). The plurality of battery clusters are accommodated in the battery compartment. The control cabinet 10 is externally arranged on the battery compartment. The control cabinet 10 comprises a cabinet body 100, a busbar assembly 300 and a plurality of high-voltage boxes 200, and the busbar assembly and the plurality of high-voltage boxes 200 are integrated in the cabinet body 100. The plurality of high-voltage boxes 200 are connected to the plurality of battery clusters one by one and are connected to the busbar assembly 300.

[0034] It can be understood that a plurality of battery cells are stacked together to form a battery pack, and a plurality of battery packs are connected in series or in parallel to form a battery cluster. The plurality of battery clusters and the plurality of high-voltage boxes 200 need to be marked clearly to facilitate one-to-one correspondence.

[0035] In the energy storage system provided by the embodiment of the present application, the plurality of high-voltage boxes 200 are externally arranged on the battery compartment, so that the space originally provided for the plurality of high-voltage boxes 200 in the battery compartment can be used to place more battery clusters, so as to increase the capacity of the energy storage system. In addition, the plurality of high-voltage boxes 200 removed from the battery compartment are integrated with the busbar assembly 300 in the cabinet body 100 to form the control cabinet 10, so that the control cabinet 10 has the functions of the high-voltage boxes 200 and the busbar assembly 300. Compared with the conventional scheme in which the high-voltage boxes 200 and the busbar cabinet are arranged separately, the connection structure between the high-voltage boxes 200 and the busbar assembly 300 in the control cabinet 10 of the present application can be simpler, and the layout of the two can be more compact, so that the overall occupied space is smaller, thereby helping to reduce the volume of the energy storage system. Moreover, the plurality of high-voltage boxes 200 are integrated with the busbar assembly 300 in the cabinet body 100, which is also helpful for centralized management of the high-voltage boxes 200 and the busbar assembly 300, reducing the labor and material costs during maintenance. Further, since the control cabinet 10 is externally arranged on the battery compartment, the two can be separated from each other, so that the installation positions of the two can be adjusted according to the shape and size of the installation environment space, so that the energy storage system has stronger environmental adaptability. In summary, the energy storage system of the present application can have a larger capacity in a smaller volume, has stronger environmental adaptability, and can also reduce maintenance costs.

[0036] As shown in Figures 1 to 3 In the present application, the cabinet body 100 comprises a frame 110, a support 120 and a surrounding plate 130. The surrounding plate 130 is installed on the frame 110 and surrounds an installation space. The support 120 is located in the installation space and is fixedly connected to the frame 110. The plurality of high-voltage boxes 200 are installed on the support 120 in the vertical direction in sequence.

[0037] It is understandable that the frame 110, as the main supporting component in the cabinet 100, supports the enclosure 130 and the various components installed within the installation space enclosed by the enclosure 130. The enclosure 130, in turn, protects the components within the installation space, isolating them from other external components, thus facilitating the modular design of the control cabinet 10. This is achieved by arranging multiple high-voltage boxes 200 vertically (i.e.,...) Figure 1 Arranging the wiring ports of each high-voltage box 200 from top to bottom along the Z-axis direction allows for alignment of the wiring ports, facilitating unified wiring.

[0038] Specifically, the bracket 120 is welded from sheet metal parts. The bracket 120 has a multi-layer structure to facilitate one-to-one support of multiple high-voltage boxes 200. The frame 110 adopts a welded structure of channel steel.

[0039] Combination Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, specifically, the cabinet 100 is in a vertical position, and the surrounding panel 130 includes a bottom plate 131, a top plate 132, and four side plates 133. The bottom plate 131 and the top plate 132 are arranged opposite each other, and the four side plates 133 are located between the bottom plate 131 and the top plate 132, correspondingly surrounding the multiple high-voltage boxes 200. In other embodiments, the side plates 133 can also be five, six, or other quantities, so that the cabinet 100 as a whole presents other shapes such as pentagonal prisms or hexagonal prisms.

[0040] Furthermore, the four side panels 133 are a front side panel 133a, a rear side panel 133b, a left side panel 133c, and a right side panel 133d, wherein the front side panel 133a and the rear side panel 133b are arranged opposite each other, and the left side panel 133c and the right side panel 133d are arranged opposite each other. For ease of maintenance, the front side panel 133a can be rotated relative to the frame 110 to achieve opening and closing.

[0041] Combination Figures 1 to 3 , Figure 6 As shown, specifically in this application, the control cabinet 10 includes a low-voltage distribution box 400, which is mounted on the bracket 120. The lowest high-voltage box 200 among the multiple high-voltage boxes 200 is located above the low-voltage distribution box 400. It can be understood that the low-voltage distribution box 400 is located below the multiple high-voltage boxes 200, i.e., the multiple high-voltage boxes 200 are above and the low-voltage distribution box 400 is below, thus separating the high and low voltage levels and avoiding mutual interference. Specifically, the low-voltage distribution box 400 can output 380V or 220V AC voltage and 24V low-voltage DC voltage.

[0042] Specifically, in the present application, the bracket 120 and the two side plates 133 located on the opposite sides of the plurality of high-voltage boxes 200 are respectively provided with a first installation space 150 and a second installation space 160, and the bus assembly 300 is located in the first installation space 150, and the high-voltage cable 500 connected with the high-voltage box 200 and the low-voltage wire harness (not shown) connected with the low-voltage distribution box 400 are both arranged in the second installation space 160.

[0043] Specifically, the bracket 120 and the right side plate 133d form the first installation space 150, and the bracket 120 and the left side plate 133c form the second installation space 160. In this way, the bus assembly 300 and the high-low voltage wire harness are respectively located on the two sides of the bracket 120, which can avoid mutual interference and make the layout more reasonable and compact. In other embodiments, the positions of the first installation space 150 and the second installation space 160 can also be interchanged.

[0044] Further, the right side plate 133d corresponding to the second installation space 160 is provided with a first binding structure (not shown) on the side facing the high-voltage box 200, and the first binding structure is used for binding the high-voltage cable 500 connected between the battery cluster and the high-voltage box 200. The bracket 120 corresponding to the second installation space 160 is provided with a second binding structure (not shown), and the second binding structure is used for binding the low-voltage wire harness (not shown) connected with the low-voltage distribution box 400.

[0045] It can be understood that the first binding structure can be a wire binding beam or a metal bridge provided on the right side plate 133d. The second binding structure can be a wire binding beam or a wire slot reserved on the right side of the bracket 120, so that the high-voltage cable 500 and the low-voltage wire harness can be routed in the space between the right side of the bracket 120 and the right side plate 133d.

[0046] By arranging the first binding structure on one side plate 133 and the second binding structure on the bracket 120, the high-voltage cable 500 connected with the high-voltage box 200 and the low-voltage wire harness connected with the low-voltage distribution box 400 can be arranged separately, which can avoid the high-voltage cable 500 and the low-voltage wire harness from being wound together, thereby reducing the failure rate and improving the connection reliability. In addition, due to the differences in voltage level, insulation material, and electrical performance between the high-voltage cable 500 and the low-voltage wire harness, separate arrangement can reduce electromagnetic interference and improve the stability of the system electrical circuit. Further, separate arrangement of the high-voltage cable 500 and the low-voltage wire harness can also reduce the failure rate of wire aging, fracture, short circuit, etc., and prolong the service life of the entire system.

[0047] Further, in the present application, the bottom plate 131 is located on the side of the low-voltage distribution box 400 away from the high-voltage box 200, and the bottom plate 131 is provided with a wire passing hole 131a, and the high-voltage cable 500 and the low-voltage wire harness pass through the wire passing hole 131a.

[0048] Specifically, multiple wire holes 131a can be opened on the base plate 131. High-voltage cables 500 and low-voltage wire harnesses can be passed through different wire holes 131a for easy differentiation. Alternatively, multiple high-voltage cables 500 and multiple low-voltage wire harnesses can be passed through the same wire hole 131a. In this case, the multiple high-voltage cables 500 and multiple low-voltage wire harnesses need to be tied separately for differentiation.

[0049] In addition, for the high-voltage cable 500, since it has a large diameter and extends vertically near the right side plate 133d, it needs to be bent when it is connected to multiple high-voltage boxes 200. Therefore, sufficient space needs to be reserved between the right side plate 133d and the high-voltage box 200 for the high-voltage cable 500 to be bent.

[0050] Furthermore, the frame 110 includes multiple legs 140, which together define a support plane, with the base plate 131 spaced apart from the support plane. It can be understood that when the entire control cabinet 10 is mounted on a mounting platform, the multiple legs 140 maintain contact with the mounting platform, meaning the support plane defined by the multiple legs 140 is flush with the mounting platform. By spacing the base plate 131 from the support plane, the base plate 131 can be suspended above the mounting platform, facilitating the extension of high-voltage cables 500 and low-voltage harnesses through wire holes 131a into the mounting space along the gap between the base plate 131 and the mounting platform. Specifically, the gap between the base plate 131 and the mounting platform can be set to be no less than 100mm. In addition, a display screen can be installed on the front panel 133a, with the display screen positioned 1.5m to 1.7m above the mounting platform for easy viewing of relevant information by the operator.

[0051] Combination Figures 1 to 3 , Figure 6 As shown, specifically in this application, the energy storage system includes a cooling fan 600. The cooling fan 600 is installed on both side plates 133 corresponding to the first installation space 150 and the second installation space 160. The cooling fan 600 corresponds to or is higher than the highest high-voltage box 200 among the multiple high-voltage boxes 200.

[0052] In this application, there are two cooling fans 600, which are respectively mounted on the left side plate 133c and the right side plate 133d to quickly dissipate heat from opposite sides of the high-voltage box 200 to the first mounting space 150 and the second mounting space 160. In other embodiments, the number of cooling fans 600 may also be different.

[0053] In addition, considering that the heat generated by the high-voltage box 200 is higher than the heat generated by the low-voltage distribution box 400 during operation, the heat dissipation fan 600 is installed close to the high-voltage box 200, which can improve the heat dissipation effect and efficiency. Further, a temperature sensor can be arranged in the installation space, and the temperature in the installation space is detected by the temperature sensor, and the start and stop of the heat dissipation fan 600 can be controlled according to the temperature in the installation space.

[0054] Combination Figures 2 to 7 As shown, specifically in the present application, the busbar assembly 300 includes a main positive busbar 310 and a main negative busbar 320. The positive output terminals of the plurality of high-voltage boxes 200 are connected to the main positive busbar 310, and the negative output terminals of the plurality of high-voltage boxes 200 are connected to the main negative busbar 320.

[0055] Specifically, the positive output terminals of all high-voltage boxes 200 can be connected to the main positive busbar 310 through single-core cables with orange insulating layers, and the negative output terminals of all high-voltage boxes 200 can be connected to the main negative busbar 320 through single-core cables with black insulating layers. The positive output terminals and the negative output terminals are distinguished by the color of the external insulating layer of the single-core cable.

[0056] Specifically, the main positive busbar 310 and the main negative busbar 320 are located on the left side of the high-voltage box 200 and have an external insulating layer to meet the insulation voltage requirements.

[0057] Further, the main positive busbar 310 and the main negative busbar 320 are spaced apart. In the present application, the main positive busbar 310 and the main negative busbar 320 are spaced apart along the direction from the front side plate 133a to the back side plate 133b, and the distance between them is not less than 25mm. By spacing them apart, mutual interference can be avoided.

[0058] In the present application, the main positive busbar 310 is located between the left side plate 133c and the bracket 120 and is spaced apart from the left side plate 133c and the bracket 120, and the main negative busbar 320 is located between the left side plate 133c and the bracket 120 and is spaced apart from the left side plate 133c and the bracket 120. It can be understood that the bracket 120 and the left side plate 133c are both made of metal, and by spacing the main positive busbar 310, the main negative busbar 320, and both of them apart, interference from the cabinet 100 can be avoided. Specifically, the distance between the main positive busbar 310 and the left side plate 133c and the bracket 120 is not less than 25mm, and the distance between the main negative busbar 320 and the left side plate 133c and the bracket 120 is not less than 25mm.

[0059] Combination Figures 2 to 7As shown, specifically in the present application, the busbar assembly 300 includes a main positive transfer busbar 330, a main negative transfer busbar 340 and a circuit breaker 350, the main positive transfer busbar 330 is connected between the main positive busbar 310 and a positive incoming line port 351 of the circuit breaker 350, and the main negative transfer busbar 340 is connected between the main negative busbar 320 and a negative incoming line port 352 of the circuit breaker 350.

[0060] It can be understood that the main positive transfer busbar 330 and the main negative transfer busbar 340 are both transfer busbars, which can serve as an intermediate bridge for the external connection of the busbar, so as to meet the requirements of various different electrical connections. The circuit breaker 350 can play a role of short-circuit protection and overload protection, so as to avoid damage to other components caused by short circuit or overload.

[0061] Specifically, the main positive busbar 310 and the main positive transfer busbar 330, and the main negative busbar 320 and the main negative transfer busbar 340 can be fixedly connected by M8 bolts.

[0062] Specifically, a plurality of single-core cables led out from the positive incoming line port 351 of the circuit breaker 350 can be further connected to the direct current side positive incoming line end of the PCS after passing through the wire hole 131a of the bottom plate 131, and a plurality of single-core cables led out from the negative incoming line port 352 of the circuit breaker 350 can be further connected to the direct current side negative incoming line end of the PCS after passing through the wire hole 131a of the bottom plate 131.

[0063] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage system, characterized by, The energy storage system comprises: a battery compartment; a plurality of battery clusters accommodated in the battery compartment; and a control cabinet externally arranged on the battery compartment, the control cabinet comprising a cabinet body, a bus assembly and a plurality of high-voltage boxes, the bus assembly and the plurality of high-voltage boxes being integrated in the cabinet body, the plurality of high-voltage boxes being connected to the bus assembly one by one. The cabinet body comprises a frame, a support and a surrounding plate, the surrounding plate being mounted on the frame and surrounding an installation space, the support being located in the installation space and fixedly connected to the frame, and the plurality of high-voltage boxes being sequentially mounted on the support in the vertical direction.

2. The energy storage system of claim 1, wherein, The control cabinet comprises a low-voltage distribution box, the low-voltage distribution box being mounted on the support, and the lowest high-voltage box among the plurality of high-voltage boxes being located above the low-voltage distribution box.

3. The energy storage system of claim 2, wherein, The surrounding plate comprises a plurality of side plates, the plurality of side plates being correspondingly arranged around the plurality of high-voltage boxes, the support and the two side plates located on opposite sides of the plurality of high-voltage boxes each having a first installation space and a second installation space therebetween, the bus assembly being located in the first installation space, the high-voltage cable connected to the high-voltage box and the low-voltage wire harness connected to the low-voltage distribution box being arranged in the second installation space.

4. The energy storage system of claim 3, wherein, The side plate corresponding to the second installation space is provided with a first binding structure for binding the high-voltage cable, and the support corresponding to the second installation space is provided with a second binding structure for binding the low-voltage wire harness.

5. The energy storage system of claim 4, wherein, The surrounding plate comprises a bottom plate located on the side of the low-voltage distribution box away from the high-voltage box, the bottom plate being provided with a wire passing hole, and the high-voltage cable and the low-voltage wire harness passing through the wire passing hole.

6. The energy storage system of claim 4, wherein, The energy storage system comprises a cooling fan, the two side plates corresponding to the first installation space and the second installation space are each provided with the cooling fan, and the cooling fan corresponds to or is higher than the highest high-voltage box among the plurality of high-voltage boxes.

7. The energy storage system of claim 4, wherein, The bus assembly comprises a main positive bus bar and a main negative bus bar, the positive output terminals of the plurality of high-voltage boxes being connected to the main positive bus bar, and the negative output terminals of the plurality of high-voltage boxes being connected to the main negative bus bar.

8. The energy storage system of claim 2, wherein, The main positive bus bar and the main negative bus bar are arranged in a spaced manner; and / or, the surrounding plate comprises a plurality of side plates, the plurality of side plates being correspondingly arranged around the plurality of high-voltage boxes, the main positive bus bar being located between the side plates and the support and arranged in a spaced manner with the side plates and the support, and the main negative bus bar being located between the side plates and the support and arranged in a spaced manner with the side plates and the support.

9. The energy storage system of claim 8, wherein, The bus assembly comprises a main positive transfer bar, a main negative transfer bar and a circuit breaker, the main positive transfer bar being connected between the main positive bus bar and a positive incoming line port of the circuit breaker, and the main negative transfer bar being connected between the main negative bus bar and a negative incoming line port of the circuit breaker.

10. The energy storage system of claim 8, wherein, ​

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