Battery cell assembly and battery module

Abstract

The utility model provides a battery cell assembly and a battery module. The battery cell assembly comprises: a battery cell unit, wherein the battery cell unit comprises a battery cell and two tabs connected to the battery cell; the cover plate assembly comprises a cover plate component and two pole pieces arranged on the cover plate component in a penetrating manner, the two pole pieces and the two pole lugs are correspondingly arranged, and included angles are formed between the pole pieces and the cover plate component; wherein each tab and the corresponding pole piece are overlapped and connected to form a connecting component, and the connecting component is arranged in a bendable manner. According to the technical scheme provided by the utility model, the problem of single application range of the battery cell assembly in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery core assembly and a battery module. Background Art

[0002] In the prior art, the metal cover plate and the positive and negative electrode sheets of the lithium battery are fixed structures, that is, the positive and negative electrode sheets are arranged parallel to the metal cover plate and attached to the metal cover plate, which makes it difficult for the positive and negative electrode sheets to move relative to the metal cover plate, and they are only welded to the fixed positions of the battery cell pole ears and the positive and negative electrode sheets. In this way, after the pole ears are welded to the corresponding electrode sheets, the position of the metal cover plate relative to the battery cell is fixed and difficult to change, resulting in the fixed metal cover plate and battery cell being able to match only a single type of battery cell shell, and being difficult to match battery cell shells of multiple depths, thereby resulting in a single scope of application of the structure (battery cell assembly) after the metal cover plate and the battery cell are connected. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery core assembly and a battery module to solve the problem of single application scope of the battery core assembly in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a battery cell assembly, including: a battery cell unit, including a battery cell and two pole ears connected to the battery cell; a cover plate assembly, including a cover plate component and two pole pieces penetrated through the cover plate component, the two pole pieces are arranged corresponding to the two pole ears, and the pole pieces and the cover plate component are arranged at an angle; wherein each pole ear is overlapped and connected with the corresponding pole piece to form a connecting component, and the connecting component can be arranged in a bendable manner.

[0005] Furthermore, the connecting member can be bent into a C-shape or a Z-shape.

[0006] Furthermore, the cover plate member can be pressed against the bent connecting member to compress the connecting member.

[0007] Furthermore, the cover plate component includes a base plate and a stopper connected to the base plate, the stopper is located on a side of the base plate facing the battery cell, and the stopper is used to limit the extreme displacement of the battery cell.

[0008] Further, the stopper is integrally formed with the base plate; and / or the cover member is made of plastic material.

[0009] Furthermore, a mounting through hole is provided on the cover plate component, the pole piece is passed through the mounting through hole, and a pole ear rubber section is provided between the inner wall of the mounting through hole and the outer wall of the pole piece.

[0010] Furthermore, a plurality of tab rubber segments are provided on the periphery of the pole piece, and the plurality of tab rubber segments are arranged at intervals along the extension direction of the pole piece.

[0011] Furthermore, the tab includes one or more layers of conductor sheets, and the multiple layers of conductor sheets are connected by welding.

[0012] Furthermore, the pole ear and the pole piece are welded.

[0013] According to another aspect of the present invention, the present invention provides a battery module, including a shell and the above-mentioned battery cell assembly arranged in the shell.

[0014] By applying the technical solution of the utility model, by adopting a bendable connecting component formed by the pole piece and the pole ear, the connecting component can be set to different bending shapes according to usage requirements, thereby changing the relative position between the cover member and the battery cell. In this way, the battery cell assembly can match shells of different depths to expand the application scope of the battery cell assembly, so that the battery cell assembly can be used in different products and different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A schematic structural diagram of an embodiment of a battery cell assembly of the utility model is shown;

[0017] Figure 2 Shows Figure 1 A right side view of a battery cell assembly;

[0018] Figure 3 A schematic structural diagram of a connecting member of an embodiment of a battery cell assembly of the utility model before being bent is shown;

[0019] Figure 4 Shows Figure 3 A schematic diagram of the structure of the connecting member in bending;

[0020] Figure 5 Shows Figure 3 A schematic diagram of the structure after the connecting member is bent;

[0021] Figure 6 Shows Figure 1 A schematic structural diagram of a cell unit of a cell assembly;

[0022] Figure 7 Shows Figure 1 A schematic structural diagram of a cover plate assembly of a battery cell assembly; and

[0023] Figure 8 Shows Figure 1 Schematic diagram of the structure of the battery cell assembly after gluing.

[0024] The above drawings include the following reference numerals:

[0025] 1. Battery cell; 2. Tab; 3. Cover member; 31. Base plate; 32. Stopper; 5. Pole piece; 7. Connecting member; 8. Adhesive tape. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] like Figures 1 to 8 As shown, the utility model provides a battery cell assembly, which includes a battery cell unit and a cover plate assembly. The battery cell unit includes a battery cell 1 and two pole ears 2 connected to the battery cell 1; the cover plate assembly includes a cover plate member 3 and two pole pieces 5 penetrating the cover plate member 3, the two pole pieces 5 are arranged corresponding to the two pole ears 2, and the pole pieces 5 and the cover plate member 3 are arranged at an angle; each pole ear 2 is overlapped and connected with the corresponding pole piece 5 to form a connecting member 7, and the connecting member 7 can be arranged in a bendable manner.

[0028] In the above technical solution, by adopting a bendable connecting member 7 formed by the pole piece 5 and the pole ear 2, the connecting member 7 can be set to different bending shapes according to usage requirements, thereby changing the relative position between the cover member 3 and the battery cell 1. In this way, the battery cell assembly can match shells of different depths to expand the application range of the battery cell assembly, so that the battery cell assembly can be used in different products and different scenarios.

[0029] Specifically, in the embodiment of the present invention, the pole piece 5 extends toward the direction close to the battery cell 1 , so that the pole ear 2 and the pole piece 5 are conveniently overlapped.

[0030] Preferably, in an embodiment of the utility model, the two pole pieces 5 are respectively a positive pole piece and a negative pole piece, both of which are made of metal conductors, wherein the positive pole piece is made of aluminum and the negative pole piece is made of copper; the two pole ears 2 are respectively a positive pole ear and a negative pole ear, both of which are made of metal conductors, wherein the positive pole ear is made of aluminum foil and the negative pole ear is made of copper foil.

[0031] Preferably, if Figure 4 and Figure 5 As shown, in the embodiment of the present invention, the connecting member 7 can be bent into a C shape or a Z shape. In this way, the distance between the cover member 3 and the battery core 1 can be reduced, so that the battery core assembly is suitable for shells of different depths.

[0032] like Figure 5As shown, in the embodiment of the utility model, the cover member 3 can be pressed against the bent connecting member 7 to compress the connecting member 7. In this way, the bent part of the connecting member 7 can be squeezed to compress the volume of the bent part, so as to make the distance between the cover member 3 and the battery cell 1 smaller, so that the battery cell assembly is suitable for a shell with a smaller depth.

[0033] It should be noted that in the embodiment of the utility model, the pole piece 5 and the pole ear 2 are first stacked, and then the pole piece 5 and the pole ear 2 are welded, and then the pole piece 5 and the pole ear 2 are connected so that the connecting member 7 is vertically arranged, and then the connecting member 7 is bent, and the bent connecting member 7 can be squeezed and compressed by the cover member 3 and the battery cell 1. In this way, the relative position between the cover member 3 and the battery cell 1 can be changed, so that the battery cell assembly can be suitable for shells of different depths.

[0034] like Figure 7 As shown, in the embodiment of the present invention, the cover member 3 includes a substrate 31 and a stopper 32 connected to the substrate 31 . The stopper 32 is located on a side of the substrate 31 facing the battery cell 1 , and is used to limit the extreme displacement of the battery cell 1 .

[0035] Through the above arrangement, after the base plate 31 is connected to the shell, the stopper 32 can limit the battery cell unit in the height direction of the battery cell assembly, thereby fixing the battery cell unit to prevent the battery cell unit from shaking violently in the height direction.

[0036] Preferably, in the embodiment of the present invention, the stopper 32 is integrally formed with the base plate 31. This facilitates processing.

[0037] Preferably, in the embodiment of the present invention, the cover member 3 is made of plastic material.

[0038] Specifically, in the embodiment of the utility model, the pole piece 5 and the cover plate member 3 are integrally injection molded, which has a simple structure and is easy to produce. The pole piece 5 is first preset in the mold, and then the plastic material is poured into the mold for molding.

[0039] Specifically, in the embodiment of the utility model, a mounting through hole is provided on the cover plate component 3 , the pole piece 5 is passed through the mounting through hole, and a pole ear rubber section is provided between the inner wall of the mounting through hole and the outer wall of the pole piece 5 .

[0040] Through the above arrangement, the pole piece 5 can be bonded to the inner wall of the mounting through hole by using the pole ear glue segment, thereby ensuring the connection stability between the pole piece 5 and the cover plate member 3, and at the same time, achieving a sealed connection between the two.

[0041] Preferably, in the embodiment of the utility model, a plurality of pole ear rubber segments are provided on the periphery of the pole piece 5, and the plurality of pole ear rubber segments are arranged at intervals along the extension direction of the pole piece 5. In this way, not only the sealing of the connection between the pole piece 5 and the cover plate member 3 can be ensured, but also the connection stability between the pole piece 5 and the cover plate member 3 can be increased.

[0042] Preferably, in the embodiment of the utility model, the tab rubber segment adopts high temperature resistant tab rubber to ensure the sealing performance of the tab rubber segment in the cover plate component 3 at high temperature.

[0043] Specifically, in the embodiment of the present invention, the tab 2 includes one or more layers of conductor sheets, and the multiple layers of conductor sheets are connected by welding.

[0044] Through the above configuration, different layers of conductor sheets can be arranged to form the tab 2 according to different module requirements.

[0045] Preferably, in the embodiment of the present invention, the pole tab 2 is welded to the pole piece 5. If the pole tab 2 includes a multi-layer conductor sheet, the multi-layer conductor sheet is first ultrasonically pre-welded and then ultrasonically welded to the pole piece 5.

[0046] Specifically, in the embodiment of the present invention, the shape of the pole piece 5 can be rectangular, L-shaped or Z-shaped.

[0047] It should be noted that, in the embodiment of the present invention, the distance between the two pole pieces 5 can be designed according to the use requirements of different modules to meet the requirements of different pole tab distances.

[0048] like Figure 8 As shown, in the embodiment of the present invention, after the pole piece 5 and the corresponding pole ear 2 are welded to form the connecting member 7 and before being bent, an adhesive tape 8 can be attached to the outer periphery of the connecting member 7 to avoid a short circuit in the connecting member 7 after being bent.

[0049] The embodiment of the utility model provides a battery module, comprising a housing and the above-mentioned battery core assembly arranged in the housing. The above-mentioned battery module has all the advantages of the above-mentioned battery core assembly.

[0050] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: by adopting a bendable connecting component formed by the pole piece and the pole ear, the connecting component can be set to different bending shapes according to usage requirements, thereby changing the relative position between the cover plate component and the battery cell. In this way, the battery cell assembly can match shells of different depths to expand the application scope of the battery cell assembly, so that the battery cell assembly can be used in different products and different scenarios.

[0051] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery cell assembly, characterized in that: include: A battery cell unit, comprising a battery cell (1) and two tabs (2) connected to the battery cell (1); A cover plate assembly, comprising a cover plate component (3) and two pole pieces (5) penetrating the cover plate component (3), the two pole pieces (5) being arranged corresponding to the two pole ears (2), and the pole pieces (5) and the cover plate component (3) being arranged at an angle; Wherein, each pole ear (2) is overlapped and connected with the corresponding pole piece (5) to form a connecting component (7), and the connecting component (7) can be arranged in a bendable manner.

2. The battery cell assembly according to claim 1, characterized in that: The connecting member (7) can be bent into a C-shape or a Z-shape.

3. The battery core assembly according to claim 1, characterized in that: The cover plate member (3) can be pressed against the bent connecting member (7) to compress the connecting member (7).

4. The battery cell assembly according to any one of claims 1 to 3, characterized in that: The cover plate component (3) comprises a base plate (31) and a stopper (32) connected to the base plate (31); the stopper (32) is located on a side of the base plate (31) facing the battery cell (1); and the stopper (32) is used to limit the extreme displacement of the battery cell (1).

5. The battery cell assembly according to claim 4, characterized in that: The stopper (32) and the base plate (31) are integrally formed; and / or, The cover plate component (3) is made of plastic material.

6. The battery cell assembly according to any one of claims 1 to 3, characterized in that: The cover plate component (3) is provided with a mounting through hole, the pole piece (5) is passed through the mounting through hole, and a pole ear rubber section is provided between the inner wall of the mounting through hole and the outer wall of the pole piece (5).

7. The battery cell assembly according to claim 6, characterized in that: A plurality of pole ear rubber segments are provided on the outer periphery of the pole piece (5), and the plurality of pole ear rubber segments are arranged at intervals along the extension direction of the pole piece (5).

8. The battery cell assembly according to any one of claims 1 to 3, characterized in that: The pole tab (2) comprises one or more layers of conductor sheets, and the multiple layers of conductor sheets are connected by welding.

9. The battery cell assembly according to any one of claims 1 to 3, characterized in that: The pole lug (2) is welded to the pole piece (5).

10. A battery module, characterized in that: A battery cell assembly according to any one of claims 1 to 9, comprising a shell and the shell.

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