Energy storage system and electric equipment

Abstract

The embodiment of the utility model relates to the technical field of batteries, and discloses an energy storage system and electric equipment. The energy storage system comprises a connecting piece, a first module and a second module, wherein the first module and the second module are stacked in the first direction. The first module is provided with a first fixing piece; the second module is provided with a second fixing piece. The connecting piece comprises a first connecting part, a second connecting part and a third connecting part which are connected in sequence. The first connecting part is provided with a first through hole and a second through hole which are communicated with each other, the first fixing piece is configured to enter the second through hole through the first through hole, and the first fixing piece located in the second through hole is clamped and fixed with the first connecting part; the third connecting part is provided with a third through hole and a fourth through hole which are communicated with each other, the second fixing piece is configured to enter the fourth through hole through the third through hole, and the second fixing piece located in the fourth through hole is clamped and fixed with the third connecting part. According to the energy storage system, the first through hole and the second through hole are formed in the connecting piece for the first fixing piece to enter and be connected in a clamped mode, the third through hole and the fourth through hole are formed for the second fixing piece to enter and be connected in a clamped mode, and the assembling efficiency can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to an energy storage system and electrical equipment. Background Art

[0002] With the development of new energy technology, batteries and battery modules are increasingly used in electronic products, vehicles, energy storage equipment, etc. In order to meet the requirements of large capacity, several small-capacity single cells are usually combined to form a large-capacity battery module.

[0003] During the implementation of the embodiments of the present application, the inventors found that the prior art generally adopts a structure in which a connecting bracket is added between two single cells, and the connecting bracket is fixed to the single cell by screwing. On the one hand, the connecting bracket increases the volume of the entire battery module and occupies a large space. On the other hand, the screwing method leads to low assembly efficiency, affecting production efficiency. Utility Model Content

[0004] The main technical problem solved by the embodiments of the present application is to provide an energy storage system and electrical equipment, which can effectively reduce the overall volume of the battery module and improve the installation efficiency of the product through a snap-on connection method.

[0005] The present application provides an energy storage system, which includes a first module, a second module and a connector. The first module is provided with a first fixing member; the second module is provided with a second fixing member, and the first module and the second module are stacked along a first direction; the connector includes a first connecting portion, a second connecting portion and a third connecting portion, and the first connecting portion and the third connecting portion are respectively connected to the two sides of the second connecting portion; the first connecting portion is provided with a first through hole and a second through hole that are interconnected, the first fixing member is configured to enter the second through hole through the first through hole, and the first fixing member located in the second through hole is clamped and fixed with the first connecting portion; the third connecting portion is provided with a third through hole and a fourth through hole that are interconnected, the second fixing member is configured to enter the fourth through hole through the third through hole, and the second fixing member located in the fourth through hole is clamped and fixed with the third connecting portion.

[0006] In one or more / any one of the above optional embodiments, the first through hole and the second through hole are arranged sequentially along the second direction, and the first direction and the second direction are perpendicular to each other; along the first direction, the size of the second through hole is smaller than the size of the first through hole.

[0007] In one or more / any one of the above optional embodiments, the third through hole and the fourth through hole are arranged in sequence along the second direction; along the first direction, the size of the fourth through hole is smaller than the size of the third through hole.

[0008] In one or more / any one of the above optional embodiments, the first connection portion is provided with a first opening and a first extension portion, the first opening is spaced apart from the second through hole, the first extension portion is located between the first opening and the second through hole, and the first extension portion is configured to abut against the first fixing member. And / or, the third connection portion is provided with a second opening and a second extension portion, the second opening is spaced apart from the fourth through hole, the second extension portion is located between the second opening and the fourth through hole, and the second extension portion is configured to abut against the second fixing member.

[0009] In one or more / any one of the above optional embodiments, the connecting member includes an elastic arm, the elastic arm extends from the second connecting portion, and a part of the elastic arm is separated from the second connecting portion.

[0010] In one or more / any one of the above optional embodiments, the elastic arm is provided with an abutting portion, the abutting portion is configured to abut against the first module, and / or the abutting portion is configured to abut against the second module.

[0011] In one or more / any one of the above optional embodiments, along the first direction, the projection of the abutting portion and the projection of the first fixing member are separated; and / or, along the first direction, the projection of the abutting portion and the projection of the second fixing member are separated.

[0012] In one or more / any one of the above optional embodiments, the connector further includes a disassembly portion, which is disposed on the first connection portion and / or the third connection portion, and is configured to fix the energy storage system and the external device.

[0013] In one or more / any one of the above optional embodiments, the first fixing member includes a first clamping portion and a first limiting portion extending from the first clamping portion, the first clamping portion is arranged at the second through hole, the first limiting portion is arranged at a side of the first connecting portion away from the first module group, and in a first direction, the first limiting portion exceeds the second through hole; and / or, the second fixing member includes a second clamping portion and a second limiting portion extending from the second clamping portion, the second clamping portion is arranged at the fourth through hole, the second limiting portion is arranged at a side of the second connecting portion away from the second module group, and in the first direction, the second limiting portion exceeds the fourth through hole.

[0014] The present application provides an electrical device, which includes the above-mentioned energy storage system, and the energy storage system is configured to store and release electrical energy.

[0015] The beneficial effects of the embodiment of the present application are as follows: the energy storage system of the embodiment of the present application includes a connector and a first module and a second module stacked in a first direction. The first module is provided with a first fixing member; the second module is provided with a second fixing member. The connector includes a first connecting portion, a second connecting portion and a third connecting portion connected in sequence. The first connecting portion is provided with a first through hole and a second through hole that are interconnected, the first fixing member is configured to enter the second through hole through the first through hole, and the first fixing member located in the second through hole is clamped and fixed with the first connecting portion; the third connecting portion is provided with a third through hole and a fourth through hole that are interconnected, the second fixing member is configured to enter the fourth through hole through the third through hole, and the second fixing member located in the fourth through hole is clamped and fixed with the third connecting portion. The energy storage system of the embodiment of the present application effectively improves the assembly efficiency by opening the first through hole and the second through hole on the connector for the first fixing member to enter and be clamped and connected, and opening the third through hole and the fourth through hole for the second fixing member to enter and be clamped and connected, compared with the fixing method of screw threading in the prior art, the assembly efficiency is effectively improved by directly clamping the connector with the first fixing member and the second fixing member. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application, the following is a brief introduction to the drawings required for describing the specific embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a schematic diagram of an energy storage system according to an embodiment of the present application.

[0018] Figure 2 The energy storage system of the embodiment of the present application is Figure 1 Enlarged view of part A in the figure.

[0019] Figure 3 The energy storage system of the embodiment of the present application is Figure 1 An enlarged view of detail A in which the connector is omitted.

[0020] Figure 4 It is a schematic diagram of the connector in the energy storage system of the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0023] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0024] See also Figure 1 and Figure 2 The present application provides an energy storage system 100 embodiment, the energy storage system 100 includes a first module 10, a second module 20 and a connector 30, the first module 10 and the second module 20 are stacked along a first direction X, and the connector 30 is used to simultaneously connect the first module 10 and the second module 20 to fix the first module 10 and the second module 20 to each other.

[0025] In some embodiments, the first module 10 is provided with a first fixing member 11, and the second module 20 is provided with a second fixing member 21. The connecting member 30 includes a first connecting portion 31, a second connecting portion 32, and a third connecting portion 33, and the first connecting portion 31 and the third connecting portion 33 are respectively connected to the two sides of the second connecting portion 32. The first connecting portion 31 is provided with a first through hole 311 and a second through hole 312 that are interconnected, and the first fixing member 11 is configured to enter the second through hole 312 through the first through hole 311, and the first fixing member 11 located in the second through hole 312 is clamped and fixed with the first connecting portion 31. The third connecting portion 33 is provided with a third through hole 331 and a fourth through hole 332 that are interconnected, and the second fixing member 21 is configured to enter the fourth through hole 332 through the third through hole 331, and the second fixing member 21 located in the fourth through hole 332 is clamped and fixed with the third connecting portion 33.

[0026] The energy storage system 100 of the embodiment of the present application has a first through hole 311 and a second through hole 312 on the connecting member 30 for the first fixing member 11 to enter and be snap-connected, and a third through hole 331 and a fourth through hole 332 are provided for the second fixing member 21 to enter and be snap-connected. Compared with the fixing method using screws in the prior art, the assembly efficiency is effectively improved by directly snapping the connecting member 30 with the first fixing member 11 and the second fixing member 21.

[0027] In some embodiments, see Figure 2 and Figure 3 The first fixing member 11 includes a first clamping portion 111 and a first limiting portion 112 extending from the first clamping portion 111. The first clamping portion 111 is disposed at the second through hole 312. The first limiting portion 112 is disposed at a side of the first connecting portion 31 away from the first module 10. In the first direction X, the first limiting portion 112 exceeds the second through hole 312. By setting a structure in which the first limiting portion 112 exceeds the second through hole 312 in the first direction X, the first limiting portion 112 can be in contact with the first connecting portion 31, thereby preventing the first connecting portion 31 from being separated from the first module 10 in the third direction Z.

[0028] The first direction X includes a positive direction X1 and a reverse direction X2. The first limiting portion 112 exceeds the second through hole 312 in the first direction X, which means that at least one side of the first limiting portion 112 exceeds the second through hole 312 in the positive direction X1 of the first direction X and the reverse direction X2 of the first direction X.

[0029] In some embodiments, the first clamping portion 111 and the first limiting portion 112 are roughly cylindrical in shape, and the diameter of the first limiting portion 112 is larger than the diameter of the first clamping portion 111. When the first clamping portion 111 passes through the first through hole 311 and enters the second through hole 312, the first limiting portion 112 can be clamped and fixed with the first connecting portion 31.

[0030] In other examples, the first clamping portion 111 and the first limiting portion 112 are roughly in the shape of a cuboid, a cube, a prism, etc., and the size of the first limiting portion 112 is at least partially larger than the size of the first clamping portion 111, so that when the first clamping portion 111 is located in the second through hole 312, the first limiting portion 112 can be clamped and fixed with the first connecting portion 31.

[0031] In some embodiments, see Figure 2 and Figure 3 The second fixing member 21 includes a second clamping portion 211 and a second limiting portion 212 extending from the second clamping portion 211. The second clamping portion 211 has a first end and a second end that are arranged opposite to each other. The first end of the second clamping portion 211 is arranged on the second module 20, and the second limiting portion 212 is arranged at the second end of the second clamping portion 211. The second clamping portion 211 is arranged at the fourth through hole 332, and the second limiting portion 212 is arranged at a side of the second connecting portion 32 away from the second module 20. In the first direction X, the second limiting portion 212 exceeds the fourth through hole 332. By setting a structure in which the second limiting portion 212 exceeds the fourth through hole 332 in the first direction X, the second limiting portion 212 can be abutted against the third connecting portion 33, thereby preventing the third connecting portion 33 from being separated from the second module 20 in the third direction Z.

[0032] The first direction X includes a positive direction X1 and a reverse direction X2. The second limiting portion 212 exceeds the fourth through hole 332 in the first direction X, which means that at least one side of the second limiting portion 212 exceeds the fourth through hole 332 in the positive direction X1 of the first direction X and the reverse direction X2 of the first direction X.

[0033] In some embodiments, the second clamping portion 211 and the second limiting portion 212 are roughly cylindrical in shape, and the diameter of the second limiting portion 212 is larger than the diameter of the second clamping portion 211, so that when the second limiting portion 212 and the second clamping portion 211 pass through the third through hole 331 and the second clamping portion 211 enters the fourth through hole 332, the second limiting portion 212 can be clamped and fixed with the third connecting portion 33.

[0034] In other examples, the second clamping portion 211 and the second limiting portion 212 are roughly in the shape of a cuboid, a cube, a prism, etc., and the size of the second limiting portion 212 is at least partially larger than the size of the second clamping portion 211, so that when the second clamping portion 211 is located in the fourth through hole 332, the second limiting portion 212 can be clamped and fixed with the third connecting portion 33.

[0035] In some embodiments, the first connection portion 31 is provided with a first through hole 311 and a second through hole 312 which are interconnected, wherein the first through hole 311 and the second through hole 312 are sequentially arranged along the second direction Y, and the first direction X and the second direction Y are perpendicular to each other.

[0036] Along the first direction X, the size of the second through hole 312 is smaller than that of the first through hole 311. Such a structure allows the first limit portion 112 and the first clamping portion 111 to enter from the first through hole 311, pushing the connection member 30 to move along the second direction Y, and the first clamping portion 111 enters the second through hole 312, and the first limit portion 112 is clamped with the first connection portion 31, limiting the relative movement of the connection member 30 relative to the first module 10 or the second module 20 in the third direction Z, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0037] In some embodiments, please refer to Figure 4 The first connection portion 31 is provided with a first opening 313 and a first extension portion 314, the first extension portion 314 is located between the first opening 313 and the second through hole 312, and the first extension portion 314 is configured to be abutted and connected with the first limiting portion 112 of the first fixing member 11. As an example, the first opening 313 is generally a strip-shaped hole extending along the second direction Y, the first opening 313 and the second through hole 312 are spaced apart in the second direction Y, and the part of the first connection portion 31 between the first opening 313 and the second through hole 312 constitutes the first extension portion 314. The first extension portion 314 has a stronger elastic deformation ability.

[0038] By setting the first opening 313, on the one hand, when the first limiting portion 112 abuts against the first extending portion 314, the first extending portion 314 can provide an elastic force in the third direction Z, thereby enhancing the connection firmness between the first connecting portion 31 and the first fixing member 11; on the other hand, the first connecting portion 31 can be partially hollowed out to reduce the weight of the connecting member 30, thereby reducing the overall weight of the energy storage system 100.

[0039] In some embodiments, the third connection portion 33 is provided with a third through hole 331 and a fourth through hole 332 that are interconnected, wherein the third through hole 331 and the fourth through hole 332 are sequentially arranged along the second direction Y, and the first direction X and the second direction Y are perpendicular to each other.

[0040] Along the first direction X, the size of the fourth through hole 332 is smaller than that of the third through hole 331. Such a structure allows the second limit portion 212 and the second clamping portion 211 to enter from the third through hole 331, and when the connecting member 30 is pushed to move along the second direction Y, the second clamping portion 211 enters the fourth through hole 332, and the second limit portion 212 is clamped with the third connecting portion 33, limiting the relative movement of the connecting member 30 relative to the first module 10 or the second module 20 in the third direction Z, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0041] In some embodiments, please refer to Figure 4 , the third connection portion 33 is provided with a second opening 333 and a second extension portion 334, the second opening 333 is spaced apart from the fourth through hole 332, and the second extension portion 334 is located between the second opening 333 and the fourth through hole 332. At least a portion of the second opening 333 is spaced apart from the fourth through hole 332 to form a second extension portion 334, and the second extension portion 334 is configured to be abutted and connected with the second limiting portion 212 of the second fixing member 21. As an example, the second opening 333 is generally a strip-shaped hole extending along the second direction Y, the second opening 333 and the fourth through hole 332 are spaced apart in the second direction Y, and a portion of the third connection portion 33 between the second opening 333 and the fourth through hole 332 constitutes the second extension portion 334. The second extension portion 334 has a stronger elastic deformation ability.

[0042] By setting the second opening 333, on the one hand, when the second limiting portion 212 abuts against the second extending portion 334, the second extending portion 334 can provide an elastic force in the third direction Z, thereby enhancing the connection firmness between the third connecting portion 33 and the second fixing member 21; on the other hand, the third connecting portion 33 can be partially hollowed out to reduce the weight of the connecting member 30, thereby reducing the overall weight of the energy storage system 100.

[0043] In some embodiments, please refer to Figure 2 and Figure 4 The connecting member 30 includes an elastic arm 34, and the elastic arm 34 has a first end and a second end that are arranged opposite to each other. The first end of the elastic arm 34 is connected to the second connecting portion 32, and the second end of the elastic arm 34 is a free end and can move in the third direction Z relative to the second connecting portion 32. A part of the elastic arm 34 is separated from the second connecting portion 32, such as Figure 4 As shown, one side of the elastic arm 34 is connected to the second connecting portion 32 , while the other three sides of the elastic arm 34 are not connected to the second connecting portion 32 , so that the elastic arm 34 can move relative to the second connecting portion 32 .

[0044] In the initial state, the second end of the elastic arm 34 is offset toward the first module 10 and the second module 20 relative to the second connecting portion 32. When the connecting member 30 is connected to the first module 10 and the second module 20, the second end of the elastic arm 34 abuts against the first module 10 and the second module 20, and provides an elastic force in the third direction Z, so that the connecting member 30 is better clamped and connected with the first fixing member 11 and the second fixing member 21.

[0045] In some embodiments, the elastic arm 34 is provided with an abutting portion 341, and the abutting portion 341 is configured to abut against the first module 10, and / or, the abutting portion 341 is configured to abut against the second module 20. The abutting portion 341 protrudes from the second connecting portion 32. When the connecting member 30 is connected to the first module 10 and the second module 20, the abutting portion 341 abuts against the first module 10 and / or the second module 20, and provides an elastic force in the third direction Z, so that the connecting member 30 is better connected to the first fixing member 11 and the second fixing member 21. In a further embodiment, the edge of the first module 10 and the edge of the second module 20 are both provided with an arc surface 12, and the abutting portion 341 abuts against the arc surface 12, which can further reduce the offset of the connecting member 30 relative to the first module 10 and the second module 20 in the first direction X.

[0046] See also Figure 2 , along the first direction X, the projection of the abutting portion 341 and the projection of the first fixing member 11 are separated, and / or, along the first direction X, the projection of the abutting portion 341 and the projection of the second fixing member 21 are separated. When the connecting member 30 is connected to the first module 10 and the second module 20, in the second direction Y, the position of the abutting portion 341 and the position of the first fixing member 11 and the position of the second fixing member 21 are staggered. Along the first direction X, the position of the abutting portion 341, the position of the first fixing member 11 and the position of the second fixing member 21 are not on the same straight line. The triangular distribution structure of the abutting portion 341, the first fixing member 11 and the second fixing member 21 can make the force distribution of the connecting member 30 when connected to the first module 10 and the second module 20 more uniform, enhance the connection stability of the connecting member 30, and avoid the force points being on the same straight line, causing the two ends of the connecting member 30 in the second direction Y to shake relative to the first module 10 or the second module 20.

[0047] See also Figure 2The connector 30 includes a disassembly portion 35. In the second direction Y, the disassembly portion 35 is disposed at the end of the first connector 31, or the disassembly portion 35 is disposed at the end of the third connector 33, or the end of the first connector 31 and the end of the third connector 33 are both provided with the disassembly portion 35. On the one hand, the disassembly portion 35 is used for holding the connector 30 during assembly, so as to facilitate assembly or disassembly of the connector 30 with the first module 10 and the second module 20; on the other hand, the disassembly portion 35 is used for connecting with an external fixing bracket, so as to further fix the connector 30 with the first module 10 and the second module 20.

[0048] In some embodiments, the disassembly portion 35 is plate-shaped, and the plane where the disassembly portion 35 is located is substantially perpendicular to the plane where the first connection portion 31 and / or the third connection portion 33 of the connector 30 are located. In some examples, the disassembly portion 35 is provided with a fifth through hole 351 that penetrates therethrough, and the fifth through hole 351 is configured to allow an external fixing member to pass through so as to fix the connector 30 on the fixing frame.

[0049] See also Figure 2 , the first through hole 311 and the second through hole 312 on the connecting member 30 are connected in the second direction Y, and the third through hole 331 and the fourth through hole 332 are also connected in the second direction Y, so that the connecting member 30 moves in the second direction Y. Since the first module 10 and the second module 20 are stacked in the first direction X, when the connecting member 30 is simultaneously engaged with the first module 10 and the second module 20, the first module 10 and the second module 20 can be limited in the first direction X to prevent the first module 10 and the second module 20 from moving relative to each other in the first direction X. In addition, when the disassembly portion 35 on the connecting member 30 is connected to an external fixed bracket, the connecting member 30 can be prevented from moving relative to the first module 10 and the second module 20 in the second direction Y, that is, the first module 10 and the second module 20 are limited in the second direction Y. Furthermore, since the connecting member 30 simultaneously connects the first module 10 and the second module 20, the first fixing member 11 is engaged with the first connecting portion 31, and the second fixing member 21 is engaged with the third connecting portion 33, the first module 10 and the second module 20 can be limited in the third direction Z. With such a structure, the connecting member 30 can simultaneously limit the first module 10 and the second module 20 in the first direction X, the second direction Y, and the third direction Z, so as to achieve connection and fixation of the two.

[0050] In some embodiments, Figure 1 As shown, the number of the first module 10 and the second module 20 is at least one, at least one first module 10 and at least one second module 20 are stacked in the first direction X, and two adjacent modules are connected and fixed by a connector 30. In a further example, the first module 10 and the second module 20 have the same specifications, so as to facilitate the stacking arrangement and the connection and fixation of the connector 30.

[0051] The present application also provides an embodiment of an electric device, which includes the energy storage system 100 in any of the above embodiments, and the energy storage system 100 is configured to store and release electric energy. The specific structure and function of the energy storage system 100 can be found in the above embodiments, and will not be described in detail here.

[0052] The energy storage system 100 of the embodiment of the present application includes a first module 10 , a second module 20 and a connector 30 . The first module 10 is provided with a first fixing member 11; the second module 20 is provided with a second fixing member 21, and the first module 10 and the second module 20 are stacked in the first direction X; the connecting member 30 includes a first connecting portion 31, a second connecting portion 32 and a third connecting portion 33, and the first connecting portion 31 and the third connecting portion 33 are respectively connected to the two sides of the second connecting portion 32; the first connecting portion 31 is provided with a first through hole 311 and a second through hole 312 that are interconnected, and the first fixing member 11 is configured to enter the second through hole 312 through the first through hole 311, and the first fixing member 11 located in the second through hole 312 is clamped and fixed with the first connecting portion 31; the third connecting portion 33 is provided with a third through hole 331 and a fourth through hole 332 that are interconnected, and the second fixing member 21 is configured to enter the fourth through hole 332 through the third through hole 331, and the second fixing member 21 located in the fourth through hole 332 is clamped and fixed with the third connecting portion 33. The energy storage system 100 of the embodiment of the present application has a first through hole 311 and a second through hole 312 on the connecting member 30 for the first fixing member 11 to enter and be snap-connected, and a third through hole 331 and a fourth through hole 332 for the second fixing member 21 to enter and be snap-connected, which is conducive to improving assembly efficiency.

[0053] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An energy storage system, characterized in that: include: The first module is provided with a first fixing member; A second module is provided with a second fixing member, wherein the first module and the second module are stacked along a first direction; A connecting member, comprising a first connecting portion, a second connecting portion and a third connecting portion, wherein the first connecting portion and the third connecting portion are respectively connected to two sides of the second connecting portion; The first connecting portion is provided with a first through hole and a second through hole which are interconnected, the first fixing member is configured to enter the second through hole through the first through hole, and the first fixing member located in the second through hole is clamped and fixed to the first connecting portion; The third connecting portion is provided with a third through hole and a fourth through hole which are interconnected, the second fixing member is configured to enter the fourth through hole through the third through hole, and the second fixing member located in the fourth through hole is clamped and fixed to the third connecting portion.

2. The energy storage system according to claim 1, characterized in that: The first through hole and the second through hole are arranged in sequence along a second direction, and the first direction and the second direction are perpendicular to each other; Along the first direction, a size of the second through hole is smaller than a size of the first through hole.

3. The energy storage system according to claim 2, characterized in that: The third through hole and the fourth through hole are arranged in sequence along the second direction; Along the first direction, a size of the fourth through hole is smaller than a size of the third through hole.

4. The energy storage system according to claim 3, characterized in that: The first connecting portion is provided with a first opening and a first extending portion, the first opening is spaced apart from the second through hole, the first extending portion is located between the first opening and the second through hole, and the first extending portion is configured to abut against the first fixing member; And / or, the third connecting portion is provided with a second opening and a second extension portion, the second opening is spaced apart from the fourth through hole, the second extension portion is located between the second opening and the fourth through hole, and the second extension portion is configured to abut against the second fixing member.

5. The energy storage system according to any one of claims 1 to 4, characterized in that: The connecting member includes an elastic arm extending from the second connecting portion, and a part of the elastic arm is separated from the second connecting portion.

6. The energy storage system according to claim 5, characterized in that: The elastic arm is provided with an abutting portion, and the abutting portion is configured to abut against the first module, and / or the abutting portion is configured to abut against the second module.

7. The energy storage system according to claim 6, characterized in that: Along the first direction, a projection of the abutting portion and a projection of the first fixing member are separated; And / or, along the first direction, a projection of the abutting portion and a projection of the second fixing member are separated.

8. The energy storage system according to claim 5, characterized in that: The connector further includes a disassembly portion, which is disposed on the first connection portion and / or the third connection portion, and is configured to fix the energy storage system and an external device.

9. The energy storage system according to claim 5, characterized in that: The first fixing member includes a first clamping portion and a first limiting portion extending from the first clamping portion, the first clamping portion is disposed at the second through hole, the first limiting portion is disposed at a side of the first connecting portion away from the first module, and in a first direction, the first limiting portion exceeds the second through hole; And / or, the second fixing member includes a second clamping portion and a second limiting portion extending from the second clamping portion, the second clamping portion is arranged at the fourth through hole, the second limiting portion is arranged at a side of the second connecting portion away from the second module, and in the first direction, the second limiting portion exceeds the fourth through hole.

10. An electrical device, characterized in that: Comprising the energy storage system as described in any one of claims 1-9.

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