Pole lug copper strip not prone to deformation

Abstract

The utility model belongs to the technical field of pole lug copper strips, and particularly relates to a pole lug copper strip not easy to deform, which comprises a metal sheet and rubber sheets, and the rubber sheets are positioned on two end surfaces of the metal sheet; a thickening part is integrally arranged at the welding end of the metal sheet, a reinforcing strip is integrally arranged at the welding end of the metal sheet along the length direction of the metal sheet, and a reinforcing rib is integrally arranged on the reinforcing strip; the film comprises a front film and a rear film, the front film is lapped on the metal sheet in a staggered manner, the rear film is lapped on the rear film along the direction of the metal sheet, and the tab copper strip not only improves the structural strength and deformation resistance of the tab copper strip, but also remarkably improves the sealing effect by optimizing the structural design of the metal sheet and the film.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of the tab copper strip, and particularly relates to a tab copper strip not prone to deformation. BACKGROUND

[0002] The tab is composed of a film and a metal strip, and the metal strip is usually made of copper, that is, the tab copper strip;

[0003] The film on the tab is an insulating part, which prevents the metal strip from short-circuiting with the aluminum plastic film during battery packaging and is bonded together with the aluminum plastic film by heat sealing during packaging to prevent liquid leakage.

[0004] The tab is a "connection, conduction and sealing part", wherein the "connection" refers to the connection between the inside and outside of the battery, the connection between the tab glue and the aluminum plastic film; the "conduction" refers to the conduction of electricity out of the battery and the generation of a loop; and the "sealing" refers to the sealing between the glue strip and the metal strip and the sealing between the glue strip and the aluminum plastic film. UTILITY MODEL CONTENTS

[0005] The utility model discloses a tab copper strip not prone to deformation, which solves the technical problem that the metal strip is bent near the welding part of the battery, the metal strip is bent at the edge of the battery, the metal strip is thin and damaged, deformation occurs and the service life is reduced, the structure of the glue film is simple, the melting of the glue film can completely penetrate the sealing gap, but the sealing effect needs to be improved, the structural strength of the tab copper strip is improved, deformation does not easily occur during welding to the battery and subsequently, the glue film completely seals the aluminum plastic film and the tab during the packaging process, and the sealing effect is improved.

[0006] To solve the above technical problems, the utility model provides a tab copper strip not prone to deformation, which comprises a metal sheet and a glue film.

[0007] The welding end of the metal sheet is integrally provided with a thickened part, the welding end of the metal sheet is integrally provided with a reinforcing strip along the length direction of the metal sheet, and the reinforcing strip is integrally provided with a reinforcing rib.

[0008] The glue film comprises a front glue film and a rear glue film, the front glue film is staggered and overlapped on the metal sheet, and the rear glue film is overlapped on the rear glue film along the direction of the metal sheet.

[0009] Further, the thickened portion is located at an end face of the metal sheet corresponding to a welding end of the battery, and the thickened portion has a thickness of one third to two thirds of a thickness of the metal sheet.

[0010] Further, the reinforcing strip is away from the end face of the thickened portion.

[0011] Further, the number of the reinforcing ribs is not less than two.

[0012] Further, a lap joint groove is formed on the front adhesive sheet and used for lap joint of the rear adhesive sheet.

[0013] Further, the metal sheet is welded to the battery, and a bent portion at a corner of the battery is used for lap joint of the front adhesive sheet.

[0014] Further, the front adhesive sheet and the rear adhesive sheet have a width greater than that of the metal sheet, and the front adhesive sheet and the rear adhesive sheet are bonded by heat melting sealing when the battery is packaged.

[0015] The utility model discloses a kind of not easy deformation's pole ear copper strips, by optimizing the structural design of metal sheet and adhesive sheet, not only improve the structural strength and deformation resistance of pole ear copper strip, but also significantly improve sealing effect, adapt the demand of battery packaging process.

[0016] 1, improve structural strength and deformation resistance: by integrally setting thickened portion at the welding end of metal sheet, effectively increase the thickness of the region, so that metal sheet is not prone to deformation in the process of being welded to battery and subsequent use, thereby prolonging the service life of pole ear copper strip;

[0017] The setting of reinforcing strip and reinforcing rib further enhances the overall structural strength of the metal sheet, especially at the battery adhesive strip connection part (i.e. the corner bent at the edge of the battery), these structures can effectively resist stress concentration caused by bending, prevent material damage and deformation.

[0018] 2, optimize adhesive sheet arrangement structure, improve sealing effect: change the present integrated adhesive sheet to front and rear adhesive sheets staggered lap joint on metal sheet, rear adhesive sheet is lap joint on front adhesive sheet along the direction of metal sheet, this arrangement not only increases the contact area of adhesive sheet and metal sheet and aluminum plastic film, but also makes the adhesive sheet more fully penetrate the sealing gap when melting, thereby improving the sealing effect;

[0019] The lap joint groove formed on the front adhesive sheet facilitates the lap joint of the rear adhesive sheet, ensures the close fit between the adhesive sheets, and further enhances the sealing performance.

[0020] In summary, the utility model provides a kind of not easy deformation's pole ear copper strip, by optimizing the structural design of metal sheet and adhesive sheet, not only improve the structural strength and deformation resistance of pole ear copper strip, but also significantly improve sealing effect, adapt the demand of battery packaging process.

[0021] In order to make the above object, features and advantages of the present application more obvious, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the above object, features and advantages of the present application more obvious, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows.

[0023] Fig. 1 is a schematic diagram of the overall structure of the present application;

[0024] Fig. 2 is a schematic diagram of the metal sheet structure of the present application;

[0025] Fig. 3 is a schematic diagram of the film structure of the present application.

[0026] In the figure: 1, metal sheet; 11, thickened part; 12, reinforcing strip; 13, reinforcing rib; 14, bending part; 2, film; 21, front film; 22, rear film; 23, lap joint groove. DETAILED DESCRIPTION

[0027] In order to make the above object, features and advantages of the present application more obvious, the following preferred embodiments are described in detail, and the accompanying drawings are described as follows.

[0028] Embodiment:

[0029] As shown in the figure, a kind of not easy to deform tab copper strip, including: metal sheet 1 and film 2, film 2 is located at the two end faces of metal sheet 1, for providing insulation and sealing function; Figs. 1-3 The welding end of metal sheet 1 is integrally provided with thickened part 11, and the welding end of metal sheet 1 is integrally provided with reinforcing strip 12 along the length direction of metal sheet 1, and reinforcing rib 13 is integrally provided on reinforcing strip 12, reinforcing strip 12 is away from the end face of thickened part 11, for further enhancing the structural strength of metal sheet 1, the number of reinforcing rib 13 is not less than two, which are arranged on reinforcing strip 12 at certain intervals, to provide additional support and strength for metal sheet 1.

[0030]

[0031] ​The film 2 comprises a front film 21 and a rear film 22, the front film 21 is staggered and overlapped on the metal sheet 1, which increases the contact area of the film and the metal sheet 1, and improves the sealing effect, and the rear film 22 is overlapped on the rear film 22 along the direction of the metal sheet 1, which further enhances the sealing performance. In order to facilitate the overlap of the rear film 22, the overlap groove 23 is arranged on the front film 21.

[0032] As shown in Figs. 1-3 The thickened portion 11 is located at the end face of the metal sheet 1 corresponding to the welding end of the battery, and the thickness of the thickened portion 11 is one third to two thirds of the thickness of the metal sheet 1, so that the thickened portion 11 can withstand greater thermal stress and mechanical stress during welding, thereby effectively preventing the metal sheet 1 from deforming at the welding end.

[0033] After the metal sheet 1 is welded to the battery, the bending portion 14 (the bending portion 14 is a bending portion 14 corresponding to the corner of the battery formed after the metal sheet 1 is welded to the battery) at the corner of the battery is used for the overlap of the front film 21.

[0034] The width of the front film 21 and the rear film 22 is greater than that of the metal sheet 1, so as to ensure that the film can completely cover the metal sheet 1 and the corner of the battery during battery packaging. The front film 21 and the rear film 22 are heat-fused and sealed to the aluminum-plastic film and the metal sheet 1 during battery packaging, forming a sealed structure.

[0035] In summary, the thickened portion 11 is added at the welding end of the metal sheet 1, which effectively resists thermal stress and mechanical stress during welding and prevents deformation. The addition of the reinforcing strip 12 and the reinforcing rib 13 further enhances the overall structural strength of the metal sheet 1 and improves the durability of the tab copper strip.

[0036] The front film 21 is staggered and overlapped on the metal sheet 1, which increases the contact area and improves the sealing effect. The rear film 22 is overlapped on the front film 21 along the direction of the metal sheet 1, forming a double-layer sealing structure, which further enhances the sealing performance. The overlap groove 23 arranged on the front film 21 facilitates the overlap of the rear film 22, ensuring the close fit between the films. The front film 21 and the rear film 22 are heat-fused and sealed to the aluminum-plastic film and the metal sheet 1, forming a firm sealing structure, which effectively prevents liquid leakage.

[0037] Each device selected in the present application is a general standard part or a component known to those skilled in the art, and its structure and principle can be known to those skilled in the art through technical manuals or through conventional experimental methods.

[0038] In the description of the embodiments of the utility model, unless another definite provision and limitation, the term "mount", "link", "connect" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0040] Based on the above ideal embodiments of the utility model, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A tab copper strip that is less likely to be deformed, characterized by, The utility model relates to a battery sealing structure, including: Metal sheet (1) and rubber sheet (2), rubber sheet (2) is located metal sheet (1) both ends surface; The welding end of metal sheet (1) has thickening portion (11) integrally, the welding end of metal sheet (1) has reinforcing strip (12) integrally along the length direction of metal sheet (1), and reinforcing rib (13) is integrated on reinforcing strip (12); Rubber sheet (2) includes front rubber sheet (21) and rear rubber sheet (22), front rubber sheet (21) is staggered and is overlapped on metal sheet (1), and rear rubber sheet (22) is overlapped on rear rubber sheet (22) along the direction of metal sheet (1).

2. The tab copper strip of claim 1, wherein, Thickening portion (11) is located metal sheet (1) and the corresponding end surface of battery welding end, and the thickness of thickening portion (11) is one third to two thirds of the thickness of metal sheet (1).

3. The non-deformable tab copper strip of claim 2, wherein, Reinforcing strip (12) is away from the end surface of thickening portion (11).

4. The non-deformable tab copper strip of claim 3, wherein, The number of reinforcing rib (13) is not less than two.

5. The non-deformable tab copper strip of claim 1, wherein, Front rubber sheet (21) is provided with overlapping groove (23) for the overlapping of rear rubber sheet (22).

6. The non-deformable tab copper strip of claim 1, wherein, After metal sheet (1) is welded to battery, the bending portion (14) of the corner of battery is used for the overlapping of front rubber sheet (21).

7. The non-deformable tab copper strip of claim 1, wherein, The width of front rubber sheet (21) and rear rubber sheet (22) is greater than metal sheet (1), and front rubber sheet (21) and rear rubber sheet (22) are sealed and bonded by heat melting with aluminum plastic film and metal sheet (1) when battery is packaged.

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