Battery module and energy storage system

Abstract

The embodiment of the utility model relates to the technical field of energy storage, and discloses a battery module and an energy storage system, the battery module comprises a shell, a plurality of battery cell components and a first limiting piece, the plurality of battery cell components are electrically connected, the plurality of battery cell components are all accommodated in the shell, the first limiting piece comprises a first fixing part and a first connecting part, the first connecting part is connected with the first fixing part, the first fixing part is fixed to the shell, the battery cell assembly and the first connecting part are arranged in the first direction, and the first connecting part is configured to limit movement of the battery cell assembly in the first direction. Through the mode, the embodiment of the utility model can limit the displacement of the battery cell assembly in the first direction, and is beneficial to reducing the movement of the plurality of battery cells in the first direction.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of energy storage technology, and in particular to a battery module and an energy storage system. Background Art

[0002] The existing battery module generally includes a shell, two end plates and multiple stacked battery cell assemblies, the multiple battery cell assemblies are located between the two end plates, the two end plates and the multiple battery cell assemblies are tied and fixed by a binding belt, and then placed in the shell, and then the two end plates are fixed to the shell by screws, so as to achieve the fixation between the multiple battery cell assemblies and the shell. During the transportation or moving process, multiple battery cell assemblies may move, affecting the use of the battery module. Utility Model Content

[0003] The main technical problem solved by the embodiments of the present utility model is to provide a battery module and an energy storage system, which can limit the movement of the battery cell assembly in a first direction, thereby helping to reduce the movement of multiple battery cells.

[0004] In order to solve the above technical problems, a technical solution adopted in an embodiment of the utility model is: to provide a battery module, including a shell, a plurality of battery cell assemblies and a first limiter, the plurality of battery cell assemblies are electrically connected, the plurality of battery cell assemblies are all accommodated in the shell, the first limiter includes a first fixing portion and a first connecting portion, the first connecting portion is connected to the first fixing portion, the first fixing portion is fixed to the shell, the battery cell assembly and the first connecting portion are arranged along a first direction, and the first connecting portion is configured to limit the movement of the battery cell assembly along the first direction. In this embodiment, the movement of the battery cell assembly in the first direction is limited by the first limiter, and during the transportation or handling of the battery assembly, the movement of the plurality of battery cell assemblies in the first direction can be reduced, and the risk of the battery cell assembly being damaged due to the battery cell assembly colliding with the shell along the first direction can also be reduced.

[0005] In one or more / any one of the above optional embodiments, the first connection portion abuts against the battery cell assembly. By making the first connection portion abut against the battery cell assembly, the movement of the battery cell assembly in the first direction can be restricted, thereby reducing the risk of collision between the battery cell assembly and the housing.

[0006] In one or more / any one of the above optional embodiments, the shell includes two first side walls arranged opposite to each other along a first direction and two second side walls arranged opposite to each other along a second direction, the first fixing portion is fixed to one of the second side walls, or the first fixing portion is fixed to one of the first side walls, and the first direction is perpendicular to the second direction. In this embodiment, by fixing the first fixing portion to the second side wall or the first side wall, the force applied to the first connecting portion can be transferred to the second side wall or the first side wall, thereby reducing the force applied to the battery cell assembly and improving the protection of the battery cell assembly.

[0007] In one or more / any one of the above optional embodiments, the battery module includes a first fastener; the shell is provided with a first through hole, the first fixing portion is provided with a first fixing hole, the first fastener passes through the first through hole and the first fixing hole in sequence, and the first fastener fixes the shell and the first fixing portion. In this embodiment, by passing the first fastener through the first through hole and then fixing it to the first fixing hole, the first fixing portion can be fixed from the outside of the shell, which can improve the convenience of operation compared to the method of fixing from the inside.

[0008] In one or more / any one of the above optional embodiments, the first position-limiting member includes a first guide portion, the first guide portion is connected to an end of the first connecting portion away from the first fixing portion, and along a second direction, the distance between the first guide portion and the battery cell assembly in the first direction gradually increases, and the second direction is perpendicular to the first direction. In this embodiment, by providing the first guide portion, the convenience of placing the battery cell assembly into the housing can be improved and the difficulty of operation can be reduced.

[0009] In one or more / any one of the above optional embodiments, each of the battery cell assemblies includes a battery cell and a bracket, and the battery cell is arranged between adjacent brackets. Each of the brackets includes a main body and an extension portion. Along a first direction, the extension portion exceeds the battery cell, and the extension portion and the first connecting portion are arranged along the first direction; the first connecting portion is extended along a second direction, and the first direction is perpendicular to the second direction. In this embodiment, by arranging the battery cell between adjacent brackets, the bracket can protect the battery cell, which is conducive to reducing the risk of the battery cell being damaged.

[0010] In one or more / any one of the above optional embodiments, the first connecting portion abuts against the extending portion.

[0011] In one or more / any one of the above optional embodiments, the number of the first limit members is at least two, and along the first direction, the two first limit members are respectively located on both sides of the battery cell assembly, and the two first limit members are configured to jointly limit the movement of the battery cell assembly. By setting two first limit members to jointly limit the movement of the battery cell assembly in the first direction, it is helpful to limit the movement of the battery cell assembly along the first direction or in the direction opposite to the first direction during the process of carrying or transporting the battery module.

[0012] In one or more / any one of the above optional embodiments, the plurality of battery cell assemblies are stacked along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other; the battery module includes a binding belt, and the binding belt is wrapped around the outer side of the battery cell assembly along the third direction. In this embodiment, the plurality of battery cell assemblies are bound and fixed by the binding belt, which is conducive to reducing the movement of the plurality of battery cell assemblies.

[0013] In order to solve the above technical problems, another technical solution adopted by the embodiment of the utility model is: to provide an energy storage system, including the above battery module.

[0014] The beneficial effect of the embodiment of the utility model is as follows: different from the prior art, the embodiment of the utility model sets a first limiter, and the first limiter includes a first fixing part and a first connecting part, and the first fixing part is fixed to the shell, and the first connecting part is connected to the first fixing part, and the first connecting part and the battery cell assembly are arranged along the first direction, so that the first connecting part can limit the movement of the battery cell assembly in the first direction, which is beneficial to reduce the risk of damage to the battery cell assembly due to collision between the battery cell assembly and the shell during the handling or transportation of the battery module. In addition, by limiting the battery cell assembly by the first limiter, the movement of multiple battery cell assemblies in the first direction can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0016] Figure 1 is a schematic diagram of the disassembled state of the battery module provided in the embodiment of the utility model;

[0017] Figure 2 It is a schematic cross-sectional structure diagram of a battery module provided in an embodiment of the utility model;

[0018] Figure 3 yes Figure 2 A magnified view of the area shown in part B;

[0019] Figure 4 It is a structural schematic diagram of a first position-limiting member provided in an embodiment of the utility model;

[0020] Figure 5 It is a partial structural schematic diagram of the battery module provided in an embodiment of the utility model when the first fixing part is fixed to the first side wall;

[0021] Figure 6It is a partial structural schematic diagram of a battery module provided in an embodiment of the utility model;

[0022] Figure 7 It is a schematic diagram of the structure of the bracket provided in the embodiment of the utility model;

[0023] Figure 8 yes Figure 2 Enlarged view of the area shown in middle C;

[0024] Fig. 9 yes Figure 2 Enlarged view of the area shown in D in the middle;

[0025] Fig.10 yes Figure 2 Magnified view of the area shown in middle E.

[0026] Figure Number:

[0027] 100. Battery module; 1. Shell; 11. First side wall; 12. Second side wall; 13. First through hole; 14. Bottom wall; 15. Top wall; 10. Accommodating cavity; 2. Battery cell assembly; 21. Battery cell; 22. Bracket; 221. Main body; 222. Extension part; 23. Binding belt; 24. First end plate; 25. Second end plate; 3. First limiter; 31. First fixing part; 311. First fixing hole; 32. First connecting part; 33. First guide part; 4. First fastener; 6. Screw-on. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the utility model, the utility model 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 utility model 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 on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] 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 in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0030] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] See also Figure 1 , Figure 2 and Figure 3 The battery module 100 includes a shell 1 and a plurality of battery cell assemblies 2. The battery cell assemblies 2 are all accommodated in the shell 1, and the plurality of battery cell assemblies 2 are electrically connected.

[0032] In some embodiments, see Figure 2 , Figure 3 and Figure 4 The battery module 100 includes a first limiting member 3, the first limiting member 3 includes a first fixing portion 31 and a first connecting portion 32, the first fixing portion 31 is fixed to the shell 1, and the first connecting portion 32 is connected to the first fixing portion 31. The battery cell assembly 2 and the first connecting portion 32 are arranged along the first direction X. The first connecting portion 32 is configured to limit the movement of the battery cell assembly 2 along the first direction X. In this embodiment, the battery cell assembly 2 is limited in the first direction X by the first connecting portion 32, and during the handling or transportation of the battery module 100, the risk of the battery cell assembly 2 or the shell 1 being damaged due to the movement of the battery cell assembly 2 relative to the shell 1 along the first direction X can be reduced.

[0033] In some embodiments, see Figure 1 and Figure 3 The first connection portion 32 abuts against the battery cell assembly 2 so that the first connection portion 32 can limit the battery cell assembly 2 in the first direction X, thereby reducing the risk of the battery cell assembly 2 moving relative to the shell 1 along the first direction X.

[0034] It is understandable that, in order to facilitate the installation of the battery cell assembly 2 into the housing 1, there may be a gap between the first connection portion 32 and the battery cell assembly 2, that is, the first connection portion 32 may not be connected to the battery cell assembly 2. With a gap between the first connection portion 32 and the battery cell assembly 2, the battery cell assembly 2 can move a small distance along the first direction X, and less damage is caused to the battery cell assembly 2 or the housing 1. For example, along the first direction X, the gap between the first connection portion 32 and the battery cell assembly 2 is less than 1 mm.

[0035] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The housing 1 includes two first side walls 11 arranged opposite to each other along a first direction X and two second side walls 12 arranged opposite to each other along a second direction Y, wherein the first direction X and the second direction Y are perpendicular to each other.

[0036] In some embodiments, the first fixing portion 31 is fixed to one of the second side walls 12. One end of the first connecting portion 32 is connected to the first fixing portion 31, and the other end of the first connecting portion 32 extends along the second direction Y. The first fixing portion 31 can transfer the force exerted on the first connecting portion 32 to the second side wall 12, thereby reducing the force exerted on the battery cell assembly 2 and improving the protection of the battery cell assembly 2.

[0037] In some embodiments, the first fixing portion 31 is fixed to one of the first side walls 11. The first fixing portion 31 can transfer the force exerted on the first connecting portion 32 to the first side wall 11, thereby reducing the force exerted on the battery cell assembly 2 and improving the protection of the battery cell assembly 2. Figure 5 , Figure 5 The structure of fixing the first fixing part 31 to the first side wall 11 is shown in FIG. The shape of the first connecting part 32 is generally L-shaped, one end of the first connecting part 32 is connected to the first fixing part 31, and the part of the first connecting part 32 away from the first fixing part 31 is used to limit the battery cell assembly 2 in the first direction X.

[0038] In some embodiments, the battery module includes a first fastener 4, the housing 1 is provided with a first through hole 13, the first fixing portion 31 is provided with a first fixing hole 311, and the first fastener 4 passes through the first through hole 13 in sequence and is screwed and fixed with the first fixing hole 311. The first fastener 4 is fixed from the outside of the housing 1, which is convenient for operation. The first fastener 4 fixes the first fixing portion 31 to the housing 1.

[0039] In some embodiments, see Figure 3 The first through hole 13 can be set on the second side wall 12, and the first fastener 4 passes through the first through hole 13 in sequence and is screwed and fixed with the first fixing hole 311. The first fastener 4 fixes the first fixing part 31 to the second side wall 12.

[0040] In some embodiments, see Figure 5 The first through hole 13 can be set in the first side wall 11, and the first fastener 4 passes through the first through hole 13 in sequence and is screwed and fixed with the first fixing hole 311. The first fastener 4 fixes the first fixing part 31 to the first side wall 11.

[0041] In some embodiments, the first fastener 4 is a screw.

[0042] In some embodiments, in addition to the first fastener 4 being used to fix the first fixing portion 31 to the housing 1 , other methods may be used, such as welding the first fixing portion 31 to the housing.

[0043] In some embodiments, see Figure 3 The first stopper 3 includes a first guide portion 33, and the first guide portion 33 is connected to an end of the first connecting portion 32 away from the first fixing portion 31. Along the second direction Y, the distance D1 between the first guide portion 33 and the extension portion 222 in the first direction X gradually increases. In this embodiment, by providing the first guide portion 33, the battery cell assembly 2 can be easily placed in the housing 1.

[0044] See also Figure 2 , Figure 3 , Figure 6 and Figure 7 Each battery cell assembly 2 includes a battery cell 21 and a bracket 22. A battery cell 21 is arranged between adjacent brackets 22. Each bracket 22 includes a main body 221 and an extension portion 222. The extension portion 222 is connected to one end of the main body 221. Along the first direction X, the extension portion 222 exceeds the battery cell 21.

[0045] In some embodiments, the extension portion 222 and the first connection portion 32 are arranged along the first direction X, and the first connection portion 32 is extended along the second direction Y. By arranging the battery cell 21 between adjacent brackets 22, the brackets 22 can protect the battery cell 21, which is conducive to reducing the risk of the battery cell 21 being damaged.

[0046] In some embodiments, the first connection portion 32 abuts against the extension portion 222. The extension portion 222 transmits force to the first connection portion 32, and the first connection portion 32 transmits force to the housing 1 through the first fixing portion 31, which is beneficial to reduce the force on the battery cell assembly 2 and improve the protection of the battery cell assembly 2.

[0047] In some embodiments, multiple battery cell assemblies 2 are stacked along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other. The battery module 100 includes a binding belt 23, and along the third direction Z, the binding belt 23 is wrapped around the outer side of the battery cell 2 to fix the multiple battery cell assemblies 2.

[0048] It is understandable that there may be multiple binding straps 23, and the multiple binding straps 23 are spaced apart along the first direction X, and the multiple binding straps 23 all fix the multiple battery cell assemblies 2 along the third direction Z. In this embodiment, by providing multiple binding straps 23, the binding and fixing effect of the multiple battery cell assemblies 2 can be improved.

[0049] In some embodiments, in the third direction Z, the length of the first connection portion 32 is greater than the distance between the extension portions 222 of the two outermost brackets 22, and the extension portions 222 of the two outermost brackets 22 are both in contact with the first connection portion 32. With such a configuration, the first connection portion 32 can limit the positions of all the brackets 22 in the first direction X, and during the handling or transportation of the battery module 100, the movement of the multiple brackets 22 in the first direction X can be reduced.

[0050] In some embodiments, see Figure 2 , Figure 3 and Figure 8 , the number of the first limiting members 3 is at least two, and along the first direction X, the two first limiting members 3 are respectively located on both sides of the plurality of brackets 22, the two first limiting members 3 are arranged opposite to each other, and the two first limiting members 3 are used together to limit the movement of the battery cell assembly 2 along the first direction X. In this embodiment, the battery cell assembly 2 is limited in the first direction X by the two first limiting members 3, so that the movement of the battery cell assembly 2 along the first direction or in the direction opposite to the first direction during the process of carrying or transporting the battery module 100 can be limited.

[0051] Further, each bracket 22 includes a main body 221 and two extensions 222, the two extensions 222 are respectively connected to the two ends of the main body 221, and along the first direction X, the two extensions 222 at least partially exceed the battery cell 21. One of the first connecting parts 32 abuts against one of the extensions 222, and the other first connecting part 32 abuts against the other extension 222 of the bracket 22, thereby limiting the bracket 22 in the first direction X.

[0052] It is understandable that the number of the first limiting member 3 can be only one, and in this case, the first limiting member 3 and the first side wall 11 of the housing 1 can be used together to limit the battery cell assembly 2 in the first direction X. The first connecting portion 32 of the first limiting member 3 abuts against an extension portion 222 of the bracket 22, and the other extension portion 222 of the bracket 22 abuts against the first side wall 11 of the housing 1, thereby limiting the battery cell assembly 2 in the first direction X.

[0053] In some embodiments, see Figure 2 , Figure 3 , Figure 8 , Fig. 9 and Fig.10, the number of the first stoppers 3 is four, wherein the first fixing portions 31 of the two first stoppers 3 are fixed to one of the second side walls 12 of the housing 1, and in the first direction X, the two first stoppers 3 are respectively located on both sides of the battery cell assembly 2, the first connecting portion 32 of one first stopper 3 abuts against an extension portion 222 of the bracket 22, and the first connecting portion 32 of the other first stopper 3 abuts against another extension portion 222 of the bracket 22. The first fixing portions 31 of the other two first stoppers 3 are fixed to another second side wall 12 of the housing 1, and in the first direction X, the two first stoppers 3 are respectively located on both sides of the battery cell assembly 2, the first connecting portion 32 of one first stopper 3 abuts against an extension portion 222 of the bracket 22, and the first connecting portion 32 of the other first stopper 3 abuts against another extension portion 222 of the bracket 22. In this embodiment, the battery cell assembly 2 is limited in the first direction X by the four first stoppers 3 together, so that the stability of the limitation of the battery cell assembly 2 in the first direction X can be improved. It is understandable that the number of the first limiting members 3 is not limited to one, two or four, and may be other numbers, such as three, five, etc.

[0054] In some embodiments, see Figure 1 The shell 1 includes a bottom wall 14 and a top wall 15. The bottom wall 14 is roughly rectangular. Two first side walls 11 and two second side walls 12 are respectively connected to the four edges of the bottom wall 14, so that the bottom wall 14, the top wall 15, the two first side walls 11 and the two second side walls 12 together form a accommodating cavity 10 for accommodating the battery cell assembly 2.

[0055] In some embodiments, see Figure 1 and Figure 6 The battery cell assembly 2 also includes a first end plate 24 and a second end plate 25, which are arranged relatively to each other along a third direction Z, and a plurality of battery cells 21 and a plurality of brackets 22 are located between the first end plate 24 and the second end plate 25, and a binding belt 23 binds and fixes the first end plate 24, the plurality of battery cells 21, the plurality of brackets 22 and the second end plate 25.

[0056] In an embodiment of the utility model, a first limiting member 3 is provided, the first limiting member 3 includes a first fixing portion 31 and a first connecting portion 32, the first fixing portion 31 is fixed to the shell 1, the first connecting portion 32 is connected to the first fixing portion 31, and the first connecting portion 32 and the battery cell assembly 2 are arranged along a first direction, so that the first connecting portion 32 can limit the movement of the battery cell assembly 2 in the first direction X, which is beneficial to reducing the risk of damage to the battery cell assembly 2 due to a collision between the battery cell assembly 2 and the shell 1 caused by the movement of the battery cell assembly 2 relative to the shell 1 along the second direction Y during the handling or transportation of the battery module 100. In addition, by limiting the battery cell assembly 2 by the first limiting member 3, the movement of multiple battery cell assemblies 2 in the first direction X can be reduced.

[0057] The present invention further provides an energy storage system embodiment, the energy storage system includes the above-mentioned battery module 100, the specific structure and function of the battery module 100 can be referred to the above-mentioned embodiment, and will not be described one by one here.

[0058] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery module, comprising a housing and a plurality of battery cell assemblies, wherein the plurality of battery cell assemblies are electrically connected and are accommodated in the housing, characterized in that: The battery module includes a first limiting member, which includes a first fixing portion and a first connecting portion, the first connecting portion is connected to the first fixing portion, the first fixing portion is fixed to the shell, the battery cell assembly and the first connecting portion are arranged along a first direction, and the first connecting portion is configured to limit the movement of the battery cell assembly along the first direction.

2. The battery module according to claim 1, characterized in that: The first connecting portion abuts against the battery core assembly.

3. The battery module according to claim 1, characterized in that: The shell includes two first side walls arranged opposite to each other along a first direction and two second side walls arranged opposite to each other along a second direction, the first fixing portion is fixed to one of the second side walls, or the first fixing portion is fixed to one of the first side walls, and the first direction is perpendicular to the second direction.

4. The battery module according to claim 3, characterized in that: The battery module includes a first fastener; The shell is provided with a first through hole, the first fixing portion is provided with a first fixing hole, the first fastener passes through the first through hole and the first fixing hole in sequence, and the first fastener fixes the shell and the first fixing portion.

5. The battery module according to claim 1, characterized in that: The first limiting member includes a first guide portion, which is connected to an end of the first connecting portion away from the first fixing portion. Along the second direction, the distance between the first guide portion and the battery cell assembly in the first direction gradually increases, and the second direction is perpendicular to the first direction.

6. The battery module according to any one of claims 1 to 5, characterized in that: Each of the battery cell assemblies comprises a battery cell and a bracket, wherein a battery cell is arranged between adjacent brackets, and each of the brackets comprises a main body and an extension portion, wherein the extension portion exceeds the battery cell along a first direction; The extending portion and the first connecting portion are arranged along a first direction; the first connecting portion is extended along a second direction, and the first direction is perpendicular to the second direction.

7. The battery module according to claim 6, characterized in that: The first connecting portion abuts against the extending portion.

8. The battery module according to claim 6, characterized in that: The number of the first limiting members is at least two. Along the first direction, the two first limiting members are respectively located on both sides of the battery cell assembly, and the two first limiting members are configured to jointly limit the movement of the battery cell assembly.

9. The battery module according to claim 6, characterized in that: The plurality of battery cell assemblies are stacked along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The battery module comprises a binding belt, and the binding belt surrounds the outer side of the battery cell assembly along the third direction.

10. An energy storage system, characterized in that: Comprising a battery module as described in any one of claims 1-9.

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