Battery cell, energy storage cabinet and electric equipment

Abstract

The utility model discloses a battery cell, an energy storage cabinet and electric equipment. The battery cell comprises a shell, a plurality of positive columns and a plurality of negative columns; the plurality of positive columns are arranged on the first side of the shell, protrude from the first side and are arranged at intervals, and the plurality of positive columns are arranged along the first direction of the battery cell; the plurality of negative columns are arranged on the second side of the shell, protrude from the second side and are arranged at intervals, and the plurality of negative columns are arranged along the first direction of the battery cell; the first side and the second side are oppositely arranged along a second direction of the battery cell, and the first direction is vertical to the second direction. According to the utility model, the plurality of convex positive poles and the plurality of convex negative poles are arranged on the two sides of the battery cell, the battery cell can be mounted in the energy storage cabinet through the positive poles and the negative poles, and meanwhile, the positive poles and the negative poles can be electrically connected, so that the mounting structure of the battery cell in the energy storage cabinet is simplified, the size of the battery cell can be enlarged, and the energy density of the energy storage cabinet is improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of energy storage cabinets, and more specifically to a battery cell, an energy storage cabinet, and an electrical equipment. Background Art

[0002] An electricity storage cabinet is a device for storing electrical energy. In view of the development and application of existing energy storage systems, there are increasingly high requirements for the space utilization rate and system integration of the electricity storage cabinet. However, with the improvement of its function integration, the structure of the electricity storage cabinet becomes more complex, and the energy density decreases instead, affecting the performance parameters of the electricity storage cabinet.

[0003] In order to alleviate the contradiction between the structure of the electricity storage cabinet and the occupied energy density, a battery plug-in type electricity storage cabinet is provided in the prior art. This plug-in type electricity storage cabinet requires a battery module box as an auxiliary, and the battery cells are assembled in the battery module box and then plugged and assembled, which increases the structural cost and hinders the heat dissipation of the battery cells at the same time.

[0004] Therefore, it is necessary to provide a battery cell, an energy storage cabinet, and an electrical equipment to at least partially solve the above problems. Summary of the Utility Model

[0005] A series of simplified concepts are introduced in the Summary of the Utility Model section, which will be further elaborated in the Detailed Implementation section. The Summary of the Utility Model section of the present utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, a first aspect of the present utility model provides a battery cell, including:

[0007] A housing;

[0008] A plurality of positive electrode posts, the plurality of positive electrode posts are arranged on a first side of the housing, protrude from the first side and are arranged at intervals, and the plurality of positive electrode posts are arranged along a first direction of the battery cell;

[0009] A plurality of negative electrode posts, the plurality of negative electrode posts are arranged on a second side of the housing, protrude from the second side and are arranged at intervals, and the plurality of negative electrode posts are arranged along the first direction of the battery cell;

[0010] The first side and the second side are arranged opposite to each other along a second direction of the battery cell, and the first direction is perpendicular to the second direction.

[0011] Optionally, a cross-section of the positive electrode post and / or the negative electrode post along the second direction is a convex T shape or a convex arc shape, the arc shape is a part of a circle or a part of an ellipse, and the convex direction is arranged along the second direction of the battery cell.

[0012] Optionally, the cross-section of the positive electrode post and / or the negative electrode post along the second direction is a convex T shape, and the positive electrode post and / or the negative electrode post are further provided with a slot, and the slot extends from the side of the positive electrode post and / or the negative electrode post away from the housing towards the housing.

[0013] Optionally, the length B of the battery cell along the second direction is 1000 - 3000 mm.

[0014] Optionally, chamfers are provided at the edges of the positive electrode post and the negative electrode post, and the chamfers are straight chamfers or rounded chamfers.

[0015] Optionally, the battery cell further includes:

[0016] A plurality of explosion-proof valves, which are arranged on the first side and / or the second side of the housing and are spaced apart from the positive electrode post or the negative electrode post;

[0017] A plurality of liquid injection ports, which are arranged on the first side and / or the second side of the housing and are spaced apart from the positive electrode post or the negative electrode post.

[0018] A second aspect of the present utility model provides an energy storage cabinet, including the battery cell according to any one of the above technical solutions.

[0019] Optionally, the energy storage cabinet further includes:

[0020] A cabinet body, a plurality of the battery cells are arranged inside the cabinet body, and the plurality of battery cells are stacked up and down.

[0021] Optionally, the energy storage cabinet further includes:

[0022] A plug-and-play transfer module, which is arranged on the side wall of the cabinet body, and the positive electrode post and the negative electrode post of the battery cell are connected to the plug-and-play transfer module to realize the series connection or parallel connection of the plurality of battery cells.

[0023] Optionally, the plug-and-play transfer module includes:

[0024] An insulating housing, which is fixedly connected to the cabinet body;

[0025] A connecting part, which is arranged on the insulating housing, and the connecting part includes a connecting groove or a connecting protrusion, the connecting groove is connected to the convex positive electrode post or negative electrode post, and the connecting protrusion is connected to the concave positive electrode post or negative electrode post.

[0026] Optionally, at least one end of the cabinet body is provided with an entrance and exit;

[0027] The energy storage cabinet further includes a cabinet door for closing the entrance and exit of the cabinet body.

[0028] Optionally, the cabinet door is provided with door heat dissipation holes that penetrate the cabinet door to connect the internal space and the external space of the cabinet body.

[0029] Optionally, the energy storage cabinet further includes:

[0030] A sealing strip disposed on the inner wall of the cabinet door and / or the inner wall of the end of the cabinet body. After the cabinet door is closed, the sealing strip is used to abut against the battery cells to reinforce the battery cells.

[0031] Optionally, the energy storage cabinet further includes:

[0032] A heat dissipation window disposed at the end of the cabinet body;

[0033] A heat dissipation air cooler disposed on the heat dissipation window.

[0034] Optionally, the energy storage cabinet further includes:

[0035] A load-bearing module including a support tray fixedly connected to the cabinet body for supporting the battery cells.

[0036] Optionally, the support tray is provided with longitudinal heat dissipation holes and flat heat dissipation holes. The flat heat dissipation holes penetrate the support tray along the first direction or the second direction of the support tray, and the longitudinal heat dissipation holes penetrate the support tray along the third direction of the support tray. The first direction, the second direction, and the third direction are perpendicular to each other.

[0037] Optionally, the longitudinal heat dissipation holes and the flat heat dissipation holes are arranged at intervals on the support tray.

[0038] Optionally, the load-bearing module further includes:

[0039] A load-bearing plate disposed on the side wall of the cabinet body, and the support tray is fixedly connected to the load-bearing plate;

[0040] A load-bearing column disposed on the side wall of the cabinet body, and the load-bearing plate is fixedly connected to the load-bearing column.

[0041] Optionally, the load-bearing plate is perpendicular or inclined to the load-bearing column.

[0042] Optionally, the plug-and-play transfer module includes:

[0043] An insulating housing fixedly connected to the cabinet body;

[0044] The connecting plate is disposed on the insulating housing. The connecting plate includes a connecting hole, and the connecting hole is connected to the protruding positive electrode column or negative electrode column by a bolt.

[0045] The third aspect of the present invention provides an electrical device, including the energy storage cabinet according to any one of the above technical solutions.

[0046] According to a battery cell, an energy storage cabinet and an electrical device of the present invention, by providing a plurality of protruding positive electrode columns and a plurality of negative electrode columns on both sides of the battery cell, the battery cell can be installed in the energy storage cabinet through the positive electrode columns and the negative electrode columns. At the same time, the positive electrode columns and the negative electrode columns can also achieve electrical connection, simplifying the installation structure of the battery cell in the energy storage cabinet, expanding the size of the battery cell, and improving the energy density of the energy storage cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The following drawings of the embodiments of the present invention are used as a part of the present invention to understand the present invention. The embodiments and descriptions of the present invention are shown in the drawings to explain the principles of the present invention. In the drawings,

[0048] Figure 1 is an exploded view of an energy storage cabinet according to a preferred embodiment of the present invention;

[0049] Figure 2 is a perspective view of a battery cell according to a preferred embodiment of the present invention;

[0050] Figure 3 is an exploded view of a plug-in transfer module and a battery cell electrode column according to a preferred embodiment of the present invention;

[0051] Figure 4 is an assembled view of a plug-in transfer module and a battery cell electrode column according to a preferred embodiment of the present invention;

[0052] Figure 5 is a partial enlarged view of a positive electrode column of a battery cell according to a preferred embodiment of the present invention;

[0053] Figure 6 is an exploded view of a plug-in transfer module and a battery cell electrode column according to a preferred embodiment of the present invention;

[0054] Figure 7 is an assembled view of a plug-in transfer module and a battery cell electrode column according to a preferred embodiment of the present invention;

[0055] Figure 8 is an exploded view of a plug-in transfer module and a battery cell electrode column according to a preferred embodiment of the present invention;

[0056] Figure 9Assembly diagram of the plug-in transfer module and the battery cell terminal according to a preferred embodiment of the present utility model;

[0057] Figure 10 Partial enlarged view of the positive terminal of the battery cell according to a preferred embodiment of the present utility model;

[0058] Figure 11 Partial enlarged view of the sliding connection part of the plug-in transfer module according to a preferred embodiment of the present utility model;

[0059] Figure 12 Exploded view of the bolt connection plate and the battery cell terminal according to a preferred embodiment of the present utility model;

[0060] Figure 13 Structural schematic diagram of the plug-in transfer module according to a preferred embodiment of the present utility model;

[0061] Figure 14 Exploded view of the plug-in transfer module and the battery cell terminal according to a preferred embodiment of the present utility model;

[0062] Figure 15 Assembly diagram of the plug-in transfer module and the battery cell terminal according to a preferred embodiment of the present utility model;

[0063] Figure 16 Exploded view of the energy storage cabinet according to a preferred embodiment of the present utility model;

[0064] Figure 17 Stereogram of the energy storage cabinet according to a preferred embodiment of the present utility model;

[0065] Figure 18 Stereogram of the energy storage cabinet according to a preferred embodiment of the present utility model;

[0066] Figure 19 Structural schematic diagram of the heat dissipation holes of the support tray according to a preferred embodiment of the present utility model;

[0067] Figure 20 Stereogram of the energy storage cabinet according to a preferred embodiment of the present utility model.

[0068] Explanation of reference numerals:

[0069] 1: Energy storage cabinet 2: Battery cell

[0070] 3: Plug-in transfer module 4: Load-bearing module

[0071] 5: Heat dissipation system 11: Cabinet door

[0072] 12: Sealing strip 13: Door bolt

[0073] 14: Door handle 15: Cabinet body

[0074] 21: Explosion-proof valve 22: Positive terminal

[0075] 23: Negative terminal 24: Liquid injection port

[0076] 25: Housing 221: Chamfer

[0077] 222: First connecting body 223: Second connecting body

[0078] 224: Slot 31: Series block

[0079] 32: Adapter piece 33: Output bus

[0080] 34: Main interface 311: Insulating housing

[0081] 312: Limiting plate 313: Connecting part

[0082] 314: Partition board 315: Bolt

[0083] 316: Connecting groove 41: Load-bearing plate

[0084] 42: Load-bearing column 43: Support tray

[0085] 41a: Load-bearing plate 51: Cooling air blower

[0086] 52: Door cooling hole 53: Longitudinal cooling hole

[0087] 54: Flat cooling hole 55: Cooling window

[0088] 313a: Connecting part 22a: Positive terminal

[0089] 23a: Negative terminal 311a: Insulating housing

[0090] 313b: Connecting part 22b: Positive terminal

[0091] 23b: Negative terminal 313c: Connecting plate

[0092] 314c: Connecting hole 316a: Connecting groove

[0093] 22c: Positive terminal 23c: Negative terminal

[0094] 24c: Connecting hole Detailed implementation method

[0095] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. However, it will be apparent to one of ordinary skill in the art that the present utility model may be practiced without one or more of these details. In other instances, well-known features of the art are not described in order to avoid obscuring the present utility model.

[0096] For a thorough understanding of the present utility model, a detailed description will be presented in the following. It should be understood that these embodiments are provided so that the disclosure of the present utility model is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present utility model is not limited to the specific details familiar to those of ordinary skill in the art. The preferred embodiments of the present utility model are described in detail below. However, in addition to these detailed descriptions, the present utility model may have other embodiments.

[0097] Ordinal numbers such as "first" and "second" cited in the present utility model are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0098] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used in the present utility model are for illustrative purposes only and not for limitation.

[0099] The present utility model discloses a battery cell, an energy storage cabinet, and an electrical equipment.

[0100] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings.

[0101] As Figure 1 、 Figure 2 shown, in a preferred embodiment, a battery cell 2 includes:

[0102] A housing 25, which is an external protection component of the battery cell 2, and components such as a positive electrode material, a negative electrode material, a separator, and an electrolyte are disposed inside the housing 25;

[0103] A plurality of positive electrode posts 22, which are disposed on a first side of the housing 25, protrude from the first side and are spaced apart, and the plurality of positive electrode posts 22 are arranged along a first direction of the battery cell 2. The first direction is the X-axis direction in the figure, and the positive electrode posts 22 are connected to the positive electrode material inside the housing 25;

[0104] Multiple negative electrode posts 23 are provided on the second side of the housing 25, protruding from the second side and arranged at intervals. The multiple negative electrode posts 23 are arranged along the first direction of the battery cell 2, and the first direction is the X-axis direction in the figure. The negative electrode posts 23 are connected to the negative electrode material inside the housing 25;

[0105] The first side and the second side are arranged opposite to each other along the second direction of the battery cell 2, and the second direction is the Y-axis direction in the figure. The first direction is perpendicular to the second direction.

[0106] According to design requirements, the number of the positive electrode posts 22 and the negative electrode posts 23 can be selected from 2 to 20.

[0107] For the battery cell 2 in this embodiment, by providing multiple positive electrode posts 22 and multiple negative electrode posts 23 protruding on both sides of the battery cell 2, the battery cell 2 can be installed in the energy storage cabinet through the positive electrode posts 22 and the negative electrode posts 23. At the same time, the positive electrode posts 22 and the negative electrode posts 23 can also achieve electrical connection, simplifying the installation structure of the battery cell 2 in the energy storage cabinet, expanding the size of the battery cell 2, and improving the energy density of the energy storage cabinet.

[0108] In one embodiment, as Figure 2 shown, the length A of the battery cell 2 along the first direction is greater than the length B along the second direction. The length B can be selected from 1000 - 3000 mm, and different sizes can be selected for the length B according to actual needs, so that the width of the battery cell 2 can match the width of the energy storage cabinet 1. The battery cell 2 is a cuboid structure, and the positive electrode posts 22 and the negative electrode posts 23 are provided on the two longer sides of the battery cell 2. On the one hand, it is convenient to set the positive electrode posts 22 and the negative electrode posts 23. On the other hand, it can effectively avoid the bending deformation of the battery cell 2 caused by relying on the positive electrode posts 22 and the negative electrode posts 23 to support, which affects the performance.

[0109] In one embodiment, as Figure 3 、 Figure 4 、 Figure 5 shown, the cross-section of the positive electrode post 22 and the negative electrode post 23 along the second direction is a convex T shape, and the convex direction is arranged along the second direction of the battery cell 2. The second direction extends from the first side of the housing 25 to the second side. By designing the cross-section of the positive electrode post 22 and the negative electrode post 23 as a convex T shape, it can be connected to the plug-in transfer module 3 in a sliding plug-in manner, so as to quickly and accurately complete the series connection process of the battery cell 2, with high convenience.

[0110] Moreover, the mortise and tenon structure of the T-shaped structure that fits with the plug-in transfer module 3 can further increase the contact area and enhance the stability, ensuring the over-current capacity at the electrode post.

[0111] The structures of the positive electrode post 22 and the negative electrode post 23 are usually the same. Taking the positive electrode post 22 as an example, as Figure 6As shown, the positive electrode post 22 includes a first connecting body 222 and a second connecting body 223. The height of the first connecting body 222 is greater than that of the second connecting body 223, such that the cross-section of the positive electrode post 22 along the second direction is a convex T shape. The first connecting body 222 and the second connecting body 223 can be integrally manufactured. The structure of the negative electrode post 23 refers to that of the positive electrode post 22 and will not be described in detail here.

[0112] In one embodiment, as Figure 6 , Figure 7 shown, the cross-sections of the positive electrode post 22a and the negative electrode post 23a along the second direction are convex arcs, and the arcs are part of a circle or part of an ellipse. The convex direction is set along the second direction of the battery cell 2, and the second direction extends from the first side of the housing 25 to the second side. By designing the cross-sections of the positive electrode post 22 and the negative electrode post 23 as convex arcs, a sliding plug-in connection can be made with the plug-in transfer module 3, so as to quickly and accurately complete the series connection process of the battery cell 2, which has high convenience. The positive electrode post 22a and the negative electrode post 23a adopt a full circular arc structure, which can further improve the smoothness of insertion and extraction, reduce mechanical wear, and enhance the device life.

[0113] According to requirements, the positive electrode post 22 and the negative electrode post 23 can also be designed with different structures. For example, one of them is a convex T shape and the other is a convex arc.

[0114] By designing the positive electrode post 22 and the negative electrode post 23 as convex structures, the battery cell 2 can be installed in the energy storage cabinet through the positive electrode post 22 and the negative electrode post 23, and at the same time, the positive electrode post 22 and the negative electrode post 23 can also achieve electrical connection, simplifying the installation structure of the battery cell 2 in the energy storage cabinet.

[0115] In one embodiment, as Figure 8 , Figure 9 , Figure 10 shown, the cross-section of the positive electrode post 22b and / or the negative electrode post 23b is a convex T shape, and the positive electrode post 22b and / or the negative electrode post 23b are further provided with a slot 224, and the slot 224 extends from the side of the positive electrode post 22b and / or the negative electrode post 23b away from the housing 25 towards the housing 25.

[0116] By providing the slot 224 on the positive electrode post 22b and the negative electrode post 23b, a plug-in electrical connection can be achieved in cooperation with the sliding plug-in connection part 313b, and the connection method is a sliding plug-in connection, so as to quickly and accurately complete the series connection process of the battery cell 2, which has high convenience.

[0117] In one embodiment, the positive electrode post 22 and / or the negative electrode post 23 is a hollow structure. By designing the positive electrode post 22 and the negative electrode post 23 as hollow structures, the weight of the positive electrode post 22 and the negative electrode post 23 can be appropriately reduced without affecting their load-bearing capacity. Since multiple positive electrode posts 22 and negative electrode posts 23 are provided on both sides of the battery cell 2, even if the positive electrode post 22 and the negative electrode post 23 are designed as hollow structures, the positive electrode post 22 and the negative electrode post 23 will not be deformed due to load-bearing.

[0118] In one embodiment, as Figure 5 shown, chamfers 221 are provided at the edges of the positive electrode post 22 and the negative electrode post 23, and the chamfers 221 are straight chamfers or rounded chamfers. By providing the chamfers 221, it is convenient to insert the positive electrode post 22 and the negative electrode post 23 into the connection groove 316 of the connection part 313. During the insertion and extraction process of the battery cell 2, a small amount of misalignment caused by the deformation or insertion and extraction movement of the battery cell 2 is allowed, so as to more quickly and accurately complete the series connection process of the battery cell 2.

[0119] As Figure 6 shown, chamfers are also provided at the edges of the positive electrode post 22a and the negative electrode post 23a; as Figure 8 , Figure 10 shown, chamfers are also provided at the edges of the positive electrode post 22b and the negative electrode post 23b.

[0120] In one embodiment, as Figure 2 shown, the battery cell 2 further includes:

[0121] Multiple explosion-proof valves 21, which are arranged on the first side and / or the second side of the housing 25, are spaced apart from the positive electrode post 22 or the negative electrode post 23. The explosion-proof valves 21 are used to release the gas and other substances inside the battery cell 2 when the battery cell 2 is out of control thermally, so as to avoid the explosion of the battery cell 2;

[0122] Multiple liquid injection ports 24, which are arranged on the first side and / or the second side of the housing 25, are spaced apart from the positive electrode post 22 or the negative electrode post 23. The liquid injection ports 24 are used to inject electrolyte into the battery cell 2. The design of the multiple liquid injection ports 24 ensures the uniformity of liquid injection and shortens the liquid injection time.

[0123] As Figure 1 , Figure 16 shown, this embodiment also provides an energy storage cabinet 1, which includes the battery cell 2 described in any one of the above technical solutions.

[0124] Multiple battery cells 2 are arranged in the energy storage cabinet 1, and the multiple battery cells 2 are arranged in a stacked state in the upper and lower layers in the energy storage cabinet 1.

[0125] In one embodiment, as Figure 17 , Figure 18 shown, the energy storage cabinet 1 further includes:

[0126] Cabinet body 15, multiple battery cells 2 are arranged inside the cabinet body 15, and the multiple battery cells 2 are stacked up and down. The cabinet body 15 is made of steel structure, and the size specifications can be designed according to actual needs, such as a 20-foot cabinet, a 40-foot cabinet or a cabinet with a larger size.

[0127] In one embodiment, as Figure 1 , Figure 16 shown, the energy storage cabinet 1 further includes:

[0128] Plug-in transfer module 3, the plug-in transfer module 3 is arranged on the side wall of the cabinet body 15, and the positive electrode post 22 and the negative electrode post 23 of the battery cell 2 are connected to the plug-in transfer module 3 to realize the series or parallel connection of multiple battery cells 2.

[0129] The plug-in transfer module 3 is arranged on the side walls on both sides of the entrance and exit of the cabinet body 15. The battery cell 2 enters the inside of the cabinet body 15 from the entrance and exit and is connected to the plug-in transfer module 3 in a sliding plug-in manner, so as to quickly and accurately complete the series connection process of the battery cell 2, which has high convenience. The battery cell 2 can also be pulled out from the entrance and exit to disconnect from the plug-in transfer module 3.

[0130] As Figure 13 shown, when the positive electrode posts 22 and the negative electrode posts 23 of the upper and lower battery cells 2 are located on different sides, multiple battery cells 2 can be connected in series. When the positive electrode posts 22 and the negative electrode posts 23 of the upper and lower battery cells 2 are located on the same side, multiple battery cells 2 can be connected in parallel.

[0131] In order to realize the series or parallel connection of the upper and lower battery cells 2, the plug-in transfer modules 3 on both sides of the entrance and exit of the cabinet body 15 need to be arranged in a staggered manner, and the positive electrode post 22 and the negative electrode post 23 of one battery cell 2 need to be connected to the plug-in transfer modules 3 at different heights. For this reason, one plug-in transfer module 3 can usually be connected to two battery cells 2. In order to make up for the height difference at the top and bottom on different sides, it is also necessary to design a plug-in transfer module 3 as Figure 14 shown. The plug-in transfer module 3 in Figure 14 can only be connected to one battery cell 2, and the plug-in transfer modules 3 in Figure 14 are respectively arranged at the top and bottom on different sides, and the height difference can be made up.

[0132] In one embodiment, as Figure 3 , Figure 4 shown, the plug-in transfer module 3 includes:

[0133] Insulating housing 311, the insulating housing 311 is fixedly connected to the cabinet body 15; the insulating housing 311 and the cabinet body 15 can be fixedly connected by bolts;

[0134] The connecting part 313 is arranged on the insulating housing 311. The connecting part 313 includes a connecting groove 316 which is connected to the outwardly protruding positive electrode post 22 or negative electrode post 23. The shape of the connecting groove 316 is adapted to the shapes of the positive electrode post 22 and the negative electrode post 23. In the figure, the cross-sections of the positive electrode post 22 and the negative electrode post 23 are outwardly protruding T-shaped, and the cross-section of the connecting groove 316 is rectangular. The connecting part 313 needs to be made of a conductor material, which realizes the structural connection between the battery cell 2 and the energy storage cabinet 1 and also realizes the electrical connection between multiple battery cells 2, simplifying the installation structure of the battery cell 2 in the energy storage cabinet.

[0135] The insulating housing 311 is provided with an installation groove for installing the connecting part 313. The installation groove is arranged along the length direction of the insulating housing 311. Partition plates 314 are arranged at both ends of the installation groove to prevent the connecting part 313 from moving along with the battery cell 2 during the insertion and extraction of the battery cell 2, ensuring that the positive electrode post 22 and the negative electrode post 23 of the battery cell 2 are accurately and completely embedded into the connecting groove 316 of the connecting part 313. Limiting plates 312 are arranged on the upper and lower sides of the installation groove. The limiting plates 312 and the partition plates 314 jointly form a limiting structure for the connecting part 313.

[0136] It should be noted that the connecting part 313 is built into the installation groove of the insulating housing 311, and the installation groove has a movable margin. That is, although the connecting part 313 is built into the installation groove of the insulating housing 311, it is not completely fitted, but has a movable property in the height and width directions of the battery cell 2. The moving range can be selected between 2 - 20 mm, but it is locked in the length direction of the battery cell 2.

[0137] This design has two key functions. On the one hand, under the structure with a movable margin, during the insertion and extraction of the battery cell 2, it can effectively prevent the problem that the battery cell 2 deforms due to its excessive length, resulting in inaccurate alignment between the positive and negative electrode posts and the plug - and - play transfer module 3, making it difficult to insert and extract. It ensures that the battery cell 2 can be smoothly inserted into and extracted from the cabinet 15 without damaging the electrode posts of the battery cell 2 and avoiding performance problems and safety problems caused by mechanical damage. On the other hand, due to the extreme design of the size of the battery cell 2, which has relatively large dimensions in the length and width directions, there is inevitably a self - bending phenomenon due to its own weight. At this time, the positive electrode post 22 and the negative electrode post 23 inserted into the plug - and - play transfer module 3 will be stressed. The existence of the movable margin allows the positive electrode post 22 and the negative electrode post 23 to bend slightly with the battery cell 2, thus effectively avoiding safety accidents caused by excessive stress on the positive electrode post 22 and the negative electrode post 23. Combined with the high - strength support of the support tray 43, it can avoid the self - bending of the battery cell 2 and effectively maintain the structural stability of the battery cell 2, improving the overall safety performance of the system.

[0138] In one embodiment, as Figure 6 、 Figure 7 shown, the plug - and - play transfer module 3 includes:

[0139] Insulating housing 311, the insulating housing 311 is fixedly connected to the cabinet body 15; the insulating housing 311 and the cabinet body 15 can be fixedly connected by bolts;

[0140] Connecting part 313a, the connecting part 313a is arranged on the insulating housing 311, the connecting part 313a includes a connecting groove 316a, and the connecting groove 316a is connected to the protruding positive electrode column 22a or negative electrode column 23a. The shape of the connecting groove 316a is adapted to the shapes of the positive electrode column 22a and the negative electrode column 23a. In the figure, the cross-sections of the positive electrode column 22a and the negative electrode column 23a are convex arcs, and the cross-section of the connecting groove 316a is an arc. The connecting part 313a needs to be made of a conductor material. While realizing the structural connection between the battery cell 2 and the energy storage cabinet 1, it also realizes the electrical connection between multiple battery cells 2, simplifying the installation structure of the battery cell 2 in the energy storage cabinet.

[0141] In one embodiment, as Figure 8 、 Figure 9 shown, the plug-and-play transfer module 3 includes:

[0142] Insulating housing 311a, the insulating housing 311a is fixedly connected to the cabinet body 15; the insulating housing 311a and the cabinet body 15 can be fixedly connected by bolts;

[0143] Connecting part 313b, the connecting part 313b is arranged on the insulating housing 311a, the connecting part 313b includes a connecting protrusion, and the connecting protrusion is connected to the concave positive electrode column 22 or negative electrode column 23. The insulating housing 311a needs to be made of an insulating material, and the connecting part 313b needs to be made of a conductor material. While realizing the structural connection between the battery cell 2 and the energy storage cabinet 1, it also realizes the electrical connection between multiple battery cells 2, simplifying the installation structure of the battery cell 2 in the energy storage cabinet.

[0144] As Figure 10 、 Figure 11 shown, the cross-section of the positive electrode column 22b and / or the negative electrode column 23b is a convex T shape, and the positive electrode column 22b and / or the negative electrode column 23b are also provided with a slot 224, and the slot 224 extends inward from the side surface of the positive electrode column 22b and / or the negative electrode column 23b. The slot 224 is slidably inserted into the connecting part 313b, which is highly convenient.

[0145] The connecting part 313b can be designed as a C shape, including two connecting protrusions, and can be connected to the positive electrode column 22b and the negative electrode column 23b, or the positive electrode column 22b and the positive electrode column 22b, or the negative electrode column 23b and the negative electrode column 23b at the same time.

[0146] The connecting part 313b is built inside the insulating housing 311a. On the one hand, it reduces the connecting structure components and lowers the structure manufacturing cost. On the other hand, compared with the connecting part 313, the volume of the connecting part 313b is reduced, which can further reduce the cost. Moreover, while ensuring the over-current capacity, the connecting part 313b can effectively provide deformation ability, ensuring that the pole column of the battery cell 2 can have a small amount of bending along with the battery cell 2, avoiding damage to the pole column structure.

[0147] In one embodiment, as Figure 12 shown, the plug-and-play transfer module 3 includes:

[0148] An insulating housing 311 (not shown in the figure), which is fixedly connected to the cabinet body 15; the insulating housing 311 and the cabinet body 15 can be fixedly connected by bolts;

[0149] A connecting plate 313c, which is arranged on the insulating housing 311. The connecting plate 313c includes a connecting hole 314c. The connecting hole 314c is connected to the protruding positive pole column 22c or negative pole column 23c by a bolt 315. Corresponding connecting holes 24c are also provided on the positive pole column 22c and the negative pole column 23c. The connecting hole 314c can be a clearance hole, and the connecting hole 24c is a threaded hole. The connecting plate 313c needs to be made of a conductor material, which not only realizes the structural connection between the battery cell 2 and the energy storage cabinet 1, but also realizes the electrical connection between multiple battery cells 2, simplifying the installation structure of the battery cell 2 in the energy storage cabinet.

[0150] The insulating housing 311 is provided with a mounting groove for mounting the connecting plate 313c. The mounting groove is arranged along the length direction of the insulating housing 311. Limiting plates 312 (the partition plate 314 is no longer provided) are arranged on the upper and lower sides of the mounting groove. The limiting plates 312 form a limiting structure for the connecting plate 313c. The connecting plate 313c can still be connected to the insulating housing 311 in a sliding plug-in manner, and this connection method has a simpler structure.

[0151] It should be noted that Figure 12 in the structure shown, the battery cell 2 needs to be assembled with the connecting plate 313c before entering the energy storage cabinet 1, and then connected to the insulating housing 311 in a sliding plug-in manner.

[0152] As Figure 13 shown, the above-mentioned insulating housing 311 is combined with the connecting part 313, or the connecting part 313a to form a series block 31, or the insulating housing 311a is combined with the connecting part 313b to form a series block 31, or the insulating housing 311 is combined with the connecting plate 313c to form a series block 31.

[0153] The electrical connection structure between the plug-and-play transfer module 3 and the outside is as Figure 15As shown, jumper plates 32 are provided between the series-connected blocks 31 in different columns for electrical connection. The jumper plates 32 are then connected to the outgoing bus 33, which is further connected to the general interface 34. The general interface 34 is provided outside the energy storage cabinet 1 and is electrically connected to the electrical equipment through the general interface 34 to supply electrical energy to the electrical equipment.

[0154] In one embodiment, as Figure 16 , Figure 17 , Figure 18 shown, at least one side of the cabinet body 15 is provided with an entrance and exit through which the battery cells 2 can enter and exit the cabinet body 15. Each battery cell 2 enters and exits the cabinet body 15 in a push-pull manner.

[0155] The energy storage cabinet 1 further includes a cabinet door 11 for closing the entrance and exit of the cabinet body 15. A door handle 14 and a door bolt 13 are installed on the cabinet door 11. The door handle 14 is used to pull the cabinet door 11, and rotating the door bolt 13 can lock the cabinet door 11.

[0156] In one embodiment, as Figure 17 , Figure 18 shown, the energy storage cabinet 1 further includes:

[0157] A heat dissipation system 5 for cooling the multiple battery cells 2 arranged inside the cabinet body 15 to maintain the battery cells 2 at a suitable temperature and prevent accidents caused by thermal runaway of the battery cells 2 due to high temperature.

[0158] In one embodiment, the heat dissipation system 5 includes:

[0159] Door heat dissipation holes 52 provided on the cabinet door 11. The door heat dissipation holes 52 penetrate through the cabinet door 11 to connect the internal space and the external space of the cabinet body 15 for ventilation and cooling of the energy storage cabinet 1.

[0160] The shape of the door heat dissipation holes 52 can be designed into different shapes such as circular, triangular, rectangular, pentagonal, hexagonal, etc.

[0161] In one embodiment, the heat dissipation system further includes:

[0162] A heat dissipation window 55 provided at the tail of the cabinet body 15, where the tail is the end relative to the entrance and exit;

[0163] A heat dissipation air cooler 51 provided at the heat dissipation window 55. The heat dissipation air cooler 51 is electrically driven and can draw air from the inside of the cabinet body 15 when starting, promoting the flow of air from the door heat dissipation holes 52 to the heat dissipation window 55.

[0164] The door heat dissipation holes 52 correspond to the heat dissipation air cooler 51 and the heat dissipation window 55 at the tail of the cabinet body 15. Combined with the interval pores between the battery cells, it is beneficial for the air flow to pass through smoothly and fully dissipate heat from the battery cells 2.

[0165] In one embodiment, as Figure 17 , Figure 18 shown, the energy storage cabinet 1 further includes:

[0166] A sealing strip 12 is disposed on the inner wall of the cabinet door 11 and / or the inner wall of the tail of the cabinet body 15. After the cabinet door 11 is closed, the sealing strip 12 is used to abut against the battery cell 2 to reinforce the battery cell 2.

[0167] The sealing strip 12 is made of a cylindrical rubber strip material and fixed to the cabinet door 11 and the tail of the cabinet body 15. After the battery cell 2 is assembled into the interior of the cabinet body 15 by means of sliding insertion, closing the cabinet door 11 can reinforce the battery cell 2 in the front and rear directions through the plastic deformation of the rubber, stabilize the battery cell 2, prevent the battery cell 2 from sliding, and is beneficial to the long-distance transportation and installation of the highly integrated energy storage cabinet 1 equipped with the battery cell 2.

[0168] In one embodiment, as Figure 1 , Figure 16 shown, the energy storage cabinet 1 further includes:

[0169] A load-bearing module 4, the load-bearing module 4 includes a support tray 43, the support tray 43 is fixedly connected to the cabinet body 15, and is used to support the battery cell 2. A plurality of support trays 43 are arranged below each battery cell 2. The length direction of the support tray 43 is the same as the width direction of the energy storage cabinet 1 and the width direction of the battery cell 2. The plurality of support trays 43 jointly support the battery cell 2.

[0170] The support tray 43 is centered with the explosion-proof valve 21 of the battery cell 2. The support tray 43 is provided with heat dissipation holes. This structure is beneficial to the rapid conduction of gas when the large battery cell is depressurized, ensuring sufficient depressurization and heat dissipation. In the field of large-scale energy storage, it ensures that the thermal runaway of a single battery cell does not affect the other battery cells in the energy storage cabinet 1, and further ensures the overall safety of the energy storage cabinet 1 and the safety of the energy storage station.

[0171] In one embodiment, as Figure 18 , Figure 19 shown, the heat dissipation system 5 further includes a longitudinal heat dissipation hole 53 and a flat heat dissipation hole 54 provided on the support tray 43. The flat heat dissipation hole 54 penetrates the support tray 43 along the first direction or the second direction of the support tray 43. The longitudinal heat dissipation hole 53 penetrates the support tray 43 along the third direction of the support tray 43. The first direction, the second direction and the third direction are perpendicular to each other, and the third direction is the Z-axis direction in the figure. Figure 19 It can also be considered that the axial direction of the longitudinal heat dissipation hole 53 is arranged along the height direction of the support tray 43, and the axial direction of the flat heat dissipation hole 54 is arranged along the length direction or the width direction of the support tray 43.

[0172] In one embodiment, the longitudinal heat dissipation holes 53 and the horizontal heat dissipation holes 54 are arranged at intervals on the support tray 43. The horizontal heat dissipation holes 54 are arranged in a staggered manner with the longitudinal heat dissipation holes 53, so as to simultaneously dissipate heat longitudinally and horizontally, achieve rapid heat transfer, and ensure the safety of the battery cell 2.

[0173] The support tray 43 is centered with the explosion-proof valve 21 of the battery cell 2. The longitudinal heat dissipation holes 53 and the horizontal heat dissipation holes 54 on the support tray 43 are conducive to the rapid conduction of gas when the large battery cell is depressurized, ensuring sufficient depressurization and heat dissipation. In the field of large-scale energy storage, it is ensured that the thermal runaway of a single battery cell does not affect the other battery cells in the energy storage cabinet 1, thereby ensuring the overall safety of the energy storage cabinet 1 and the safety of the energy storage station.

[0174] The shapes of the longitudinal heat dissipation holes 53 and the horizontal heat dissipation holes 54 can be designed into different shapes such as circular, triangular, rectangular, pentagonal, hexagonal, etc.

[0175] In one embodiment, as Figure 17 , Figure 18 shown, the load-bearing module 4 further includes:

[0176] A load-bearing plate 41, which is arranged on the side wall of the cabinet body 15, and the support tray 43 is fixedly connected to the load-bearing plate 41;

[0177] Load-bearing columns 42, which are arranged on the side wall of the cabinet body 15, and the load-bearing plate 41 is fixedly connected to the load-bearing columns 42.

[0178] The load-bearing plate 41 and the load-bearing columns 42 can adopt steel structural profiles and are fixedly connected by welding, which plays a role in fixing and increasing the load-bearing capacity of the cabinet body 15. The support tray 43 is fixedly connected to the load-bearing plate 41 and the load-bearing columns 42 by welding. The single-layer load-bearing capacity needs to meet the load-bearing requirements to ensure that the battery cell 2 maintains a flat position without deformation, ensuring the structural stability and uniformity of the battery cell 2 and guaranteeing the service life of the energy storage cabinet 1.

[0179] In one embodiment, the load-bearing plate 41 and the load-bearing columns 42 are vertically arranged. The load-bearing columns 42 are vertically arranged, and the load-bearing plate 41 is horizontally arranged.

[0180] In one embodiment, as Figure 20 shown, the load-bearing plate 41 and the load-bearing columns 42 can also be inclined. The load-bearing module 4 can also simultaneously include a horizontally arranged load-bearing plate 41 and an inclined load-bearing plate 41. When the load-bearing plate 41 is inclined, it is a cross-steel plate structure, which can save material costs while ensuring the structural stability of the cabinet body 15.

[0181] An embodiment of the present utility model further provides an electrical equipment, including the energy storage cabinet 1 described in any one of the above embodiments. The energy storage cabinet 1 is carried on the electrical equipment to provide electrical energy for the electrical equipment.

[0182] The electrical equipment can be a vehicle, a ship, a spacecraft, etc. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, a spaceship, and so on. The embodiments of the present application do not impose special restrictions on the above-mentioned electrical equipment.

[0183] The utility model designs a large cell and a highly integrated energy storage cabinet, which integrates a cabinet body, a cell module, a plug-in series transfer module, a load-bearing module, and a heat dissipation system integrated in each module. In the utility model, the integration of the plug-in series transfer module and the cabinet body, the integration of the heat dissipation system and the cabinet body, and the integration of the load-bearing module and the cabinet body realize plug-and-play, enhance the integration and convenience of the energy storage cabinet, and at the same time reduce the structural cost of the energy storage cabinet; the longitudinal heat dissipation of the tray, the flat heat dissipation holes of the tray, the heat dissipation window, the door heat dissipation holes, the air-cooling machine at the tail of the cabinet body, and the breathing space between the cells constitute a sufficient heat dissipation structure to ensure the heat dissipation safety of the cells; the load-bearing columns, the load-bearing steel plates and the supporting trays together constitute the load-bearing module, which can realize the load-bearing capacity of a large-capacity single cell; the cabinet body has a convenient size design and can be extended and designed into a 20-foot cabinet or a 40-foot cabinet; the heat dissipation channel has the dual functions of heat dissipation and pressure relief, realizes sufficient pressure relief, and ensures the safety of the system; the cells are based on the mortise-and-tenon structure of the load-bearing tray, the static connecting piece and the dynamic connecting piece, realizing plug-and-play and high maintenance convenience of unplugging and repairing.

[0184] In all the above preferred embodiments, the processes and steps described are only examples. Unless adverse effects occur, various processing operations can be performed in an order different from the order of the above processes. The order of the steps of the above processes can also be increased, combined or deleted according to actual needs.

[0185] When understanding the scope of the present utility model, as used herein, the term "comprising" and its derivatives are intended to be open-ended terms that specify the presence of the recited features, elements, components, groups, wholes, and / or steps, but do not exclude the presence of other unrecited features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "including", "having" and their derivatives.

[0186] As used herein, the terms "attached" or "attachment" include: a configuration in which an element is directly fixed to another element by directly fixing the element to the other element; a configuration in which an element is indirectly fixed to another element by fixing the element to an intermediate member, which in turn is fixed to the other element; and a configuration in which one element is integral with another element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings, such as "connected", "coupled", "joined", "mounted", "adhered", "fixed" and their derivatives. Finally, degree terms such as "substantially", "about" and "approximate" used herein indicate the amount of deviation that modifies the term such that the final result is not significantly changed.

[0187] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the technical field of the present utility model. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0188] The present utility model has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present utility model within the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model.

Claims

1. A battery cell, characterized in that: include: Housing (25); a plurality of positive electrode columns (22), the plurality of positive electrode columns (22) being arranged on a first side of the shell (25), protruding from the first side and arranged at intervals, and the plurality of positive electrode columns (22) being arranged along a first direction of the battery cell (2); A plurality of negative electrode columns (23), wherein the plurality of negative electrode columns (23) are arranged on a second side of the shell (25), protrude from the second side and are arranged at intervals, and the plurality of negative electrode columns (23) are arranged along a first direction of the battery cell (2); The first side and the second side are arranged opposite to each other along a second direction of the battery core (2), and the first direction is perpendicular to the second direction.

2. The battery cell according to claim 1, characterized in that: The cross-section of the positive electrode column (22) and / or the negative electrode column (23) along the second direction is an outwardly convex T-shape or an outwardly convex arc shape, the arc shape is a part of a circle or a part of an ellipse, and the convex direction is arranged along the second direction of the battery cell (2).

3. The battery cell according to claim 1, characterized in that: The cross-section of the positive electrode column (22) and / or the negative electrode column (23) along the second direction is an outwardly convex T-shape, and the positive electrode column (22) and / or the negative electrode column (23) is also provided with a slot (224), and the slot (224) extends from the side of the positive electrode column (22) and / or the negative electrode column (23) away from the shell (25) toward the shell (25).

4. The battery cell according to claim 1, characterized in that: The length B of the battery core along the second direction is 1000-3000 mm.

5. The battery cell according to claim 1, characterized in that: The edges of the positive electrode column (22) and the negative electrode column (23) are both provided with chamfers (221), and the chamfers (221) are straight chamfers or round chamfers.

6. The battery cell according to claim 1, characterized in that: Also includes: a plurality of explosion-proof valves (21), wherein the explosion-proof valves (21) are arranged on a first side and / or a second side of the housing (25) and are spaced apart from the positive electrode column (22) or the negative electrode column (23); A plurality of liquid injection ports (24), wherein the liquid injection ports (24) are arranged on the first side and / or the second side of the shell (25) and are spaced apart from the positive electrode column (22) or the negative electrode column (23).

7. An energy storage cabinet, characterized in that: Comprising the battery cell (2) according to any one of claims 1 to 6.

8. The energy storage cabinet according to claim 7, characterized in that: Also includes: A cabinet (15), wherein the plurality of battery cells (2) are arranged inside the cabinet (15), and the plurality of battery cells (2) are stacked up and down.

9. The energy storage cabinet according to claim 8, characterized in that: Also includes: A plug-in adapter module (3) is arranged on a side wall of the cabinet (15); the positive pole (22) and the negative pole (23) of the battery cell (2) are connected to the plug-in adapter module (3) to achieve series or parallel connection of a plurality of the battery cells (2).

10. The energy storage cabinet according to claim 9, characterized in that: The plug-in adapter module (3) comprises: An insulating shell (311), the insulating shell (311) being fixedly connected to the cabinet (15); A connecting portion (313), the connecting portion (313) being arranged on the insulating shell (311), the connecting portion (313) comprising a connecting groove (316) or a connecting protrusion, the connecting groove (316) being connected to the outwardly protruding positive electrode column (22) or the negative electrode column (23), and the connecting protrusion being connected to the inwardly concave positive electrode column (22) or the negative electrode column (23).

11. The energy storage cabinet according to claim 8, characterized in that: At least one end of the cabinet (15) is provided with an entrance and exit; The energy storage cabinet further comprises a cabinet door (11), wherein the cabinet door (11) is used to close the entrance and exit of the cabinet body (15).

12. The energy storage cabinet according to claim 11, characterized in that: The cabinet door (11) is provided with a door heat dissipation hole (52), and the door heat dissipation hole (52) penetrates the cabinet door (11) to communicate with the internal space and the external space of the cabinet body (15).

13. The energy storage cabinet according to claim 11, characterized in that: Also includes: A sealing strip (12), wherein the sealing strip (12) is arranged on the inner wall of the cabinet door (11) and / or the inner wall of the end of the cabinet body (15); after the cabinet door (11) is closed, the sealing strip (12) is used to abut against the battery cell (2) to reinforce the battery cell (2).

14. The energy storage cabinet according to claim 8, characterized in that: Also includes: A heat dissipation window (55), the heat dissipation window (55) being arranged at an end of the cabinet (15); A heat dissipation air cooler (51), wherein the heat dissipation air cooler (51) is arranged on the heat dissipation window (55).

15. The energy storage cabinet according to claim 8, characterized in that: Also includes: A load-bearing module (4), the load-bearing module (4) comprising a support tray (43), the support tray (43) being fixedly connected to the cabinet (15) and used for supporting the battery core (2).

16. The energy storage cabinet according to claim 15, characterized in that: The support tray (43) is provided with longitudinal heat dissipation holes (53) and flat heat dissipation holes (54); the flat heat dissipation holes (54) penetrate the support tray (43) along a first direction or a second direction of the support tray (43); the longitudinal heat dissipation holes (53) penetrate the support tray (43) along a third direction of the support tray (43); the first direction, the second direction and the third direction are perpendicular to each other.

17. The energy storage cabinet according to claim 16, characterized in that: The longitudinal heat dissipation holes (53) and the flat heat dissipation holes (54) are arranged at intervals on the support tray (43).

18. The energy storage cabinet according to claim 15, characterized in that: The load-bearing module (4) further comprises: A load-bearing plate (41), the load-bearing plate (41) being arranged on a side wall of the cabinet (15), and the supporting tray (43) being fixedly connected to the load-bearing plate (41); A load-bearing column (42), wherein the load-bearing column (42) is arranged on a side wall of the cabinet (15), and the load-bearing plate (41) is fixedly connected to the load-bearing column (42).

19. The energy storage cabinet according to claim 18, characterized in that: The load-bearing plate (41) and the load-bearing column (42) are arranged vertically or inclined.

20. The energy storage cabinet according to claim 9, characterized in that: The plug-in adapter module (3) comprises: An insulating shell (311), the insulating shell (311) being fixedly connected to the cabinet (15); A connecting plate (313c), the connecting plate (313c) being arranged on the insulating shell (311), the connecting plate (313c) comprising a connecting hole (314c), the connecting hole (314c) being connected to the protruding positive pole (22) or the negative pole (23) via a bolt (315).

21. An electrical equipment, characterized in that: Comprising an energy storage cabinet according to any one of claims 7-20.

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