Battery module and lithium battery

Abstract

The utility model provides a battery module and a lithium battery. The battery module comprises a first mounting bracket, a second mounting bracket, an electrode connecting piece and a screw rod, the first mounting bracket is used for being mounted on a first battery cell structure, the second mounting bracket is used for being mounted on a second battery cell structure, the electrode connecting piece is located between the first mounting bracket and the second mounting bracket, and the screw rod is arranged between the first mounting bracket and the second mounting bracket. The screw rod is used for connecting and fixing the first mounting bracket, the second mounting bracket and the electrode connecting piece in series, the electrode connecting piece comprises an electrode connecting body and a connecting buckle, and the electrode connecting body abuts against the first mounting bracket and the second mounting bracket; and the connecting buckle is connected with the electrode connecting body, the connecting buckle is arranged far away from the screw rod, and the connecting buckle is connected with at least one of the first mounting bracket and the second mounting bracket so as to enhance the pressing force of the electrode connecting body far away from the screw rod.

Description

Technical Field

[0001] The present disclosure relates to the field of battery modules, and particularly to a battery module and a lithium battery. Background Art

[0002] A battery connecting piece is a device for transmitting current and is a key component for connecting battery cells. It has various shapes, including circular, rectangular, trapezoidal, triangular, and stepped shapes, etc., and plays a crucial role in a battery pack. In traditional technologies, the battery connecting piece is fixed to the battery cell by means of resistance welding or projection welding to form an electrical connection. However, since the battery connecting piece is non-detachable after being welded to the battery cell, there are problems such as non-recyclability and difficult maintenance.

[0003] To solve the above problems, the battery connecting piece adopts a spring piece structure. The spring piece is electrically connected to the battery cell, and the battery module fixes the battery connecting piece by means of a screw to achieve a non-welded assembly of the battery connecting piece. However, when the connecting piece is assembled without welding, the spring piece of the connecting piece deforms to generate a reverse force, and there is poor contact due to insufficient pressing force at a position far from the screw, thus resulting in a poor conductive effect of the battery module.

[0004] Therefore, there is an urgent need for a structural design that can provide a relatively large pressing force and a relatively uniform force on the connecting piece. Utility Model Content

[0005] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a battery module and a lithium battery that can provide a relatively large pressing force and a relatively uniform force on the connecting piece.

[0006] The purpose of the present disclosure is achieved by the following technical solutions:

[0007] A battery module, comprising:

[0008] A first mounting bracket, a second mounting bracket, an electrode connecting piece, and a screw. The first mounting bracket is used for mounting on a first battery cell structure, the second mounting bracket is used for mounting on a second battery cell structure, the electrode connecting piece is located between the first mounting bracket and the second mounting bracket, and the screw is used for serially fixing the first mounting bracket, the second mounting bracket, and the electrode connecting piece.

[0009] The electrode connecting piece includes an electrode connection body and a connection buckle. The electrode connection body abuts against the first mounting bracket and the second mounting bracket respectively. The connection buckle is connected to the electrode connection body. The connection buckle is arranged away from the screw, and the connection buckle is connected to at least one of the first mounting bracket and the second mounting bracket.

[0010] In one embodiment, the connecting buckle is snap-fitted with the first mounting bracket.

[0011] In one embodiment, the connecting buckle is snap-fitted with the second mounting bracket.

[0012] In one embodiment, the number of the connecting buckles is at least two, and the first mounting bracket and the second mounting bracket are respectively snap-fitted with one of the connecting buckles.

[0013] In one embodiment, the connecting buckle is provided with a snap-in port through which the snap post of the first mounting bracket or the second mounting bracket passes.

[0014] In one embodiment, the connecting buckle includes a connecting portion and a bent snap-fitting portion. One end of the connecting portion is fixedly connected to the electrode connection body, and the other end of the connecting portion is fixedly connected to the bent snap-fitting portion. The bent snap-fitting portion is used for snap-fitting on the surface of the first mounting bracket or the second mounting bracket.

[0015] In one embodiment, the battery module further includes a fixing plate which is mounted on the first mounting bracket, and one end of the screw is fixed on the fixing plate.

[0016] In one embodiment, the connecting buckle is connected to the outer peripheral edge of the electrode connection body.

[0017] In one embodiment, the connecting buckles are evenly distributed along the periphery of the electrode connection body.

[0018] A lithium battery includes the battery module according to any one of the above embodiments.

[0019] Compared with the prior art, the present disclosure has at least the following advantages:

[0020] In the above battery module, the electrode connection body is located between the first mounting bracket and the second mounting bracket, so that the battery cell structures of the first mounting bracket and the second mounting bracket are electrically connected through the electrode connection piece. The screw is serially connected to fix the first mounting bracket, the second mounting bracket and the electrode connection piece, so that the electrode connection body is pressed by the first mounting bracket and the second mounting bracket. Further, the connecting buckle is arranged away from the screw, and the connecting buckle is connected to at least one of the first mounting bracket and the second mounting bracket to enhance the pressing force at the position of the electrode connection body away from the screw, so that the electrode connection piece is more evenly stressed and has better electrical conductivity. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the accompanying drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a battery module according to an embodiment;

[0023] Figure 2 is Figure 1 an exploded schematic structural diagram of the battery module shown;

[0024] Figure 3 is Figure 1 another schematic structural diagram of the battery module shown. Specific Embodiments

[0025] To facilitate the understanding of the present disclosure, the following will describe the present disclosure more comprehensively with reference to the relevant accompanying drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present disclosure more thorough and comprehensive.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present disclosure belongs. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] The present disclosure provides a battery module, which includes a first mounting bracket, a second mounting bracket, an electrode connecting piece, and a screw. The first mounting bracket is used to be mounted on a first battery cell structure, the second mounting bracket is used to be mounted on a second battery cell structure, the electrode connecting piece is located between the first mounting bracket and the second mounting bracket, and the screw is used to serially fix the first mounting bracket, the second mounting bracket, and the electrode connecting piece. The electrode connecting piece includes an electrode connection body and a connection buckle. The electrode connection body abuts against the first mounting bracket and the second mounting bracket respectively. The connection buckle is connected to the electrode connection body. The connection buckle is arranged away from the screw, and the connection buckle is connected to at least one of the first mounting bracket and the second mounting bracket.

[0029] For the above battery module, the electrode connection body is located between the first mounting bracket and the second mounting bracket, so that the battery cell structures of the first mounting bracket and the second mounting bracket are electrically connected through the electrode connecting piece. The screw serially fixes the first mounting bracket, the second mounting bracket, and the electrode connecting piece, so that the electrode connection body is pressed by the first mounting bracket and the second mounting bracket. Further, the connection buckle is arranged away from the screw, and the connection buckle is connected to at least one of the first mounting bracket and the second mounting bracket to enhance the pressing force at the position of the electrode connection body away from the screw, making the force on the electrode connecting piece more uniform and the electrical conductivity better.

[0030] To better understand the technical solutions and beneficial effects of the present disclosure, the following further describes the present disclosure in detail with specific embodiments:

[0031] As Figures 1 to 3 shown, a battery module 10 in an embodiment includes a first mounting bracket 100, a second mounting bracket 200, an electrode connecting piece 300, and a screw 400. The first mounting bracket 100 is used to be mounted on a first battery cell structure, the second mounting bracket 200 is used to be mounted on a second battery cell structure, the electrode connecting piece 300 is located between the first mounting bracket 100 and the second mounting bracket 200, and the screw 400 is used to serially fix the first mounting bracket 100, the second mounting bracket 200, and the electrode connecting piece 300.

[0032] Further, the electrode connecting piece 300 includes an electrode connection body 310 and a connection buckle 320. The electrode connection body 310 abuts against the first mounting bracket 100 and the second mounting bracket 200 respectively. The connection buckle 320 is connected to the electrode connection body 310. The connection buckle 320 is arranged away from the screw 400, and the connection buckle 320 is connected to at least one of the first mounting bracket 100 and the second mounting bracket 200.

[0033] In this embodiment, the electrode connection body 310 is electrically connected to the battery cells of the first mounting bracket 100 and the second mounting bracket 200. The first mounting bracket 100, the second mounting bracket 200, and the electrode connection piece 300 are serially fixed by a screw 400, so that the pressing force of the electrode connection body 310 near the screw 400 is relatively large. However, at this time, there is a problem that the pressing force of the electrode connection body 310 far from the screw 400 is relatively small, resulting in insufficient close contact between the electrode connection body 310 far from the screw 400 and the battery cell. By providing a connection buckle 320 at the position of the electrode connection body 310 far from the screw 400, the connection buckle 320 can be connected to one of the first mounting bracket 100 or the second mounting bracket 200, or the connection buckle 320 is respectively connected to the first mounting bracket 100 and the second mounting bracket 200, thereby increasing the pressing force received by the electrode connection body 310 far from the screw 400, and further improving the electrical conductivity.

[0034] Further, the electrode connection body 310 can be installed at the end of the battery module or between two battery modules. When the electrode connection body 310 is installed at the end of the battery module, the first mounting bracket 100 is a protective bracket at the end. The first mounting bracket 100 does not need to be provided with a battery cell, and the second mounting bracket 200 is provided with a battery cell. The electrode connection body 310 is electrically connected to the battery cell in the second mounting bracket 200. When the electrode connection body 310 is installed between two battery modules, both the first mounting bracket 100 and the second mounting bracket 200 are provided with battery cells, and the electrode connection body 310 is electrically connected to the battery cells of the first mounting bracket 100 and the second mounting bracket 200 respectively.

[0035] For the above battery module, the electrode connection body 310 is located between the first mounting bracket 100 and the second mounting bracket 200, so that the battery cell structures of the first mounting bracket 100 and the second mounting bracket 200 are electrically conducted through the electrode connection piece 300. The screw 400 serially fixes the first mounting bracket 100, the second mounting bracket 200, and the electrode connection piece 300, so that the electrode connection body 310 is pressed by the first mounting bracket 100 and the second mounting bracket 200. Further, the connection buckle 320 is arranged far from the screw 400, and the connection buckle 320 is connected to at least one of the first mounting bracket 100 and the second mounting bracket 200 to enhance the pressing force of the electrode connection body 310 far from the screw 400, so that the electrode connection piece 300 is more evenly stressed and the electrical conductivity is better.

[0036] In one embodiment, the connection buckle 320 is snap-connected to the first mounting bracket 100. In this embodiment, the number of the connection buckles 320 can be one or more, and each connection buckle 320 is snap-connected to the first mounting bracket 100 to increase the pressing force received by the electrode connection body 310.

[0037] In one embodiment, the connecting buckle 320 is snap-fitted with the second mounting bracket 200. In this embodiment, the number of the connecting buckles 320 can be one or more, and each connecting buckle 320 is snap-fitted with the second mounting bracket 200 to increase the pressing force applied to the electrode connection body 310.

[0038] In one embodiment, the number of the connecting buckles 320 is at least two, and the first mounting bracket 100 and the second mounting bracket 200 are respectively snap-fitted with one of the connecting buckles 320. In this embodiment, a part of the connecting buckles 320 are snap-fitted with the first mounting bracket 100, and another part of the connecting buckles 320 are snap-fitted with the second mounting bracket 200. In this way, by snap-fitting on the upper and lower sides, the force on the electrode connection body 310 is more uniform.

[0039] As Figure 3 shown, in one embodiment, the connecting buckle 320 is provided with a snap interface 320a through which the snap post of the first mounting bracket 100 or the second mounting bracket 200 passes. In this embodiment, the connecting buckle 320 is provided with the snap interface 320a in the vertical direction, and the snap post of the first mounting bracket 100 or the second mounting bracket 200 passes through the snap interface 320a so that the connecting buckle 320 is snap-fitted with the first mounting bracket 100 or the second mounting bracket 200.

[0040] As Figure 2 shown, in one embodiment, the connecting buckle 320 includes a connecting portion 321 and a bent snap portion 322. One end of the connecting portion 321 is fixedly connected to the electrode connection body 310, and the other end of the connecting portion 321 is fixedly connected to the bent snap portion 322. The bent snap portion 322 is used for snap-fitting on the surface of the first mounting bracket 100 or the second mounting bracket 200. In this embodiment, the connecting portion 321 and the bent snap portion 322 are integrally formed. After the electrode connection body 310 is preliminarily fixed by the screw 400, the bent snap portion 322 is bent so that the bent snap portion 322 is snap-fitted with the first mounting bracket 100 or the second mounting bracket 200. Specifically, the bent snap portion 322 abuts against the surface of the first mounting bracket 100 facing away from the first battery cell structure, or the bent snap portion 322 abuts against the surface of the second mounting bracket 200 facing away from the second battery cell structure, further increasing the pressing force on the electrode connection body 310.

[0041] As Figure 1 and Figure 2As shown, in one embodiment, the battery module further includes a fixing plate 500, which is installed on the first mounting bracket 100, and one end of the screw 400 is fixed to the fixing plate 500. It can be understood that the first mounting bracket 100 is provided with a fixing groove, the fixing plate 500 is installed in the fixing groove, one end of the screw 400 is fixed to the fixing plate 500, and the other end of the screw 400 passes through the fixing plate 500 to serially fix the first mounting bracket 100, the electrode connection body 310 and the second mounting bracket 200. The fixing plate 500 increases the stress area of the screw 400, making the overall stress more uniform. In this embodiment, the fixing plate 500 is an aluminum plate to make the heat dissipation performance of the fixing plate 500 better.

[0042] In another embodiment, the fixing plate 500 is installed on the first mounting bracket 100, and at this time, the first mounting bracket 100 is an end bracket of the battery module.

[0043] As Figure 2 and Figure 3 shown, in one embodiment, the connection buckle 320 is connected to the outer peripheral edge of the electrode connection body. In this embodiment, the screw 400 passes through the middle of the electrode connection body 310. By setting the connection buckle 320 on the outer peripheral edge of the electrode connection body, the pressing force of the electrode connection body 310 can be improved.

[0044] In one embodiment, the connection buckles 320 are evenly distributed along the four sides of the electrode connection body. In this embodiment, the number of connection buckles 320 is multiple, and the multiple connection buckles 320 are evenly distributed along the four sides of the connection body, making the force on the electrode connection body 310 more uniform, and thus making the wire effect of the electrode connection body 310 better.

[0045] This application also provides a lithium battery, including the battery module 10 described in any of the above embodiments.

[0046] Compared with the prior art, the present disclosure has at least the following advantages:

[0047] In the above-mentioned battery module, the electrode connection body 310 is located between the first mounting bracket 100 and the second mounting bracket 200, so that the battery cell structures of the first mounting bracket 100 and the second mounting bracket 200 are electrically connected through the electrode connection piece 300. The screw 400 is connected in series to fix the first mounting bracket 100, the second mounting bracket 200 and the electrode connection piece 300, so that the electrode connection body 310 is pressed by the first mounting bracket 100 and the second mounting bracket 200. Further, the connection buckle 320 is arranged away from the screw 400, and the connection buckle 320 is connected to at least one of the first mounting bracket 100 and the second mounting bracket 200 to enhance the pressing force at the position where the electrode connection body 310 is away from the screw 400, so that the electrode connection piece 300 is more evenly stressed and has better electrical conductivity.

[0048] The above embodiments only represent several implementation manners of the present disclosure. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can still be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. A battery module, comprising: A first mounting bracket, a second mounting bracket, an electrode connecting piece, and a screw. The first mounting bracket is used for mounting on a first battery cell structure, the second mounting bracket is used for mounting on a second battery cell structure, the electrode connecting piece is located between the first mounting bracket and the second mounting bracket, and the screw is used for serially fixing the first mounting bracket, the second mounting bracket, and the electrode connecting piece, characterized in that, the electrode connecting piece includes an electrode connecting body and a connecting buckle. The electrode connecting body abuts against the first mounting bracket and the second mounting bracket respectively. The connecting buckle is connected to the electrode connecting body. The connecting buckle is arranged away from the screw, and the connecting buckle is connected to at least one of the first mounting bracket and the second mounting bracket.

2. The battery module according to claim 1, wherein The connecting buckle is snap-connected to the first mounting bracket.

3. The battery module according to claim 1, wherein The connecting buckle is snap-connected to the second mounting bracket.

4. The battery module according to claim 1, wherein, The number of the connecting buckles is at least two, and the first mounting bracket and the second mounting bracket are respectively snap-connected to one of the connecting buckles.

5. The battery module according to claim 1, characterized in that, The connecting buckle is provided with a snap interface for a snap post of the first mounting bracket or the second mounting bracket to pass through.

6. The battery module according to claim 1, wherein, The connecting buckle includes a connecting portion and a bent snap portion. One end of the connecting portion is fixedly connected to the electrode connecting body, and the other end of the connecting portion is fixedly connected to the bent snap portion. The bent snap portion is used for snap-connecting to the surface of the first mounting bracket or the second mounting bracket.

7. The battery module according to claim 1, characterized in that, The battery module further includes a fixing plate, the fixing plate is mounted on the first mounting bracket, and one end of the screw is fixed on the fixing plate.

8. The battery module according to claim 1, wherein, The connecting buckle is connected to the outer peripheral edge of the electrode connecting body.

9. The battery module according to claim 8, wherein The connecting buckles are evenly distributed along the periphery of the electrode connecting body.

10. A lithium battery, characterized in that, A battery module comprising any one of claims 1 to 9.

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