CN216624337U - Pole piece structure and battery - Google Patents

Abstract

The utility model relates to a pole piece structure and a battery, wherein the pole piece structure comprises: pole piece, insulating adhesive tape and utmost point ear structure, utmost point ear structure include sheetmetal and utmost point ear film, and the sheetmetal has welding end and link, and the sheetmetal passes through the welding end to be welded in the pole piece, and utmost point ear film shaping is in link unilateral surface, and insulating adhesive tape laminates in the welding end surface, and insulating adhesive tape one end extends along utmost point ear film direction, and insulating adhesive tape covers the tip that utmost point ear film is close to the pole piece at least. The tab structure adopts the tab film to replace the traditional adhesive tape part to realize the insulation effect, and the tab film has the processing capability which is easier to control, thereby effectively preventing the width of the tab film from exceeding the metal sheet too much to influence the sealing of the battery, effectively reducing the occurrence of poor sealing in the production process of the battery and improving the production quality of the product.

Description

Pole piece structure and battery

Technical Field

The utility model relates to the technical field of button cells, in particular to a pole piece structure and a cell.

Background

Along with the popularization of steel-shell button cells, the size of the cell is also smaller, for example, LIR7840 and the diameter of the cell is 7.8mm, in order to improve the capacity of the cell, a small winding pin is often used, for example, phi 1.5mm or phi 1.2mm, and the center hole of a winding core corresponding to the small winding pin in size is also small, so when the tab and the steel shell are welded by adopting a traditional spot bottom welding process, the welding pin is easy to deform and wear due to the small diameter of the welding pin, the production difficulty is large, and therefore, a production enterprise usually adopts an external double-pin welding process to weld the tab and the steel shell.

When the external double-needle welding process is adopted for processing and production, the width of the lug is required to be relatively wide, and the welding needle can fall onto the lug during double-needle welding, so that the insulating gummed paper used for insulation on the lug needs to be correspondingly widened, and the insulation effect is ensured.

However, due to the limitation of the process capability, the variation of the width gluing position of the insulation adhesive tape is large, and the variation of the cutting length of the insulation adhesive tape is large, as shown in fig. 1 and fig. 2, in the production process, the insulation adhesive tape 400 of a part of the battery core easily falls into the sealing area a, and after the battery is pressed and sealed, the battery is easily sealed poorly, so that the leakage of the battery is caused, and the production quality of the product is affected.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one technical problem, the utility model provides a pole piece structure and a battery, wherein poor sealing performance of the battery is effectively reduced, and the production quality of the battery is improved.

The utility model discloses a pole piece structure, comprising: pole piece, insulated glue paper and through preceding the utmost point ear material area structure cuts the utmost point ear structure that forms, and utmost point ear structure includes: the metal sheet is provided with a welding end and a connecting end, the metal sheet is welded on the pole piece through the welding end, the tab film is formed on the surface of one side of the connecting end, the insulating gummed paper is attached to the surface of the welding end, one end of the insulating gummed paper extends along the direction of the tab film, and the insulating gummed paper at least covers the end part, close to the pole piece, of the tab film.

According to one embodiment of the present invention, at least the connection end is covered in the tab film.

According to one embodiment of the present invention, the tab film edge extends beyond the connection end.

According to an embodiment of the present invention, the tab structure is formed by cutting a tab material tape structure, the tab material tape structure includes a metal tape and a tab adhesive layer formed on the same surface of the metal tape, and the tab adhesive layer includes: a plurality of tab films distributed at intervals.

According to an embodiment of the utility model, the metal strip comprises: and the plurality of metal sheets are alternately connected with the plurality of tab films.

The utility model discloses a battery, comprising: the battery cell structure comprises an upper shell, a lower shell, a sealing rubber ring and a battery cell structure formed by winding the pole piece structure, wherein the upper shell is pressed to the lower shell to form an accommodating space, the sealing rubber ring is positioned between the upper shell and the lower shell, the battery cell structure is arranged in the accommodating space, the battery cell structure is provided with two pole piece structures, and the battery cell structure is connected with the upper shell and the lower shell through metal sheets of the two pole piece structures respectively.

The tab structure adopts the tab film to replace the traditional adhesive tape part to realize the insulation effect, and the tab film has the processing capability which is easier to control, so that the problem that the width of the tab film exceeds the metal sheet too much to influence the sealing of the battery is effectively prevented, the occurrence of poor sealing performance in the production process of the battery is effectively reduced, and the production quality of the product is improved; utilize the package material area that utmost point ear material area structure formed simultaneously, effectively reduce the production degree of difficulty of production utmost point ear structure, and then effectively improve the production efficiency of enterprise.

Drawings

Fig. 1 is a schematic diagram illustrating a prior art button cell with an adhesive tape falling within the sealing range of the cell.

Fig. 2 is a schematic diagram of a pole piece structure of a button cell in the prior art.

Fig. 3 is a top view of the tab material strip structure of the present invention.

Fig. 4 is a side view of an embodiment of a tab material strip structure in accordance with the present invention.

Fig. 5 is a schematic structural diagram of a single tab structure according to the present invention.

Fig. 6 is a side view of another embodiment of a tab material strip structure in accordance with the present invention.

Fig. 7 is a second schematic structural view of a single tab structure according to the present invention.

Fig. 8 is a schematic structural diagram of a pole piece structure according to the present invention.

Fig. 9 is a schematic view of the structure of the battery of the present invention.

Detailed Description

The present invention will be further described with reference to the following detailed description, wherein the drawings are for illustrative purposes only and are not intended to be limiting, wherein certain elements may be omitted, enlarged or reduced in size, and are not intended to represent the actual dimensions of the product, so as to better illustrate the detailed description of the utility model.

Example 1

Please refer to fig. 1 to 4.

The utility model provides a tab material belt structure which is mainly used for forming a tab structure and is applied to the production of button cells, the tab material strip structure mainly comprises a metal strip 100 and a tab glue layer 200 formed on the same surface of the metal strip 100, wherein the tab glue layer 200 comprises a plurality of tab glue sheets 210 distributed at intervals, and the tab glue sheets are formed on a metal belt in advance, by the sheet-making and cutting processing, a knife is cut in the interval area of two adjacent tab films 210, and then the direction from one side of the non-polar tab adhesive layer 200 to one side of the tab adhesive layer 200 is towards, cutting a knife edge corresponding to the tab film 210, thereby forming a tab structure consisting of the metal sheet 110 and the tab film 210, wherein the ends of the metal sheet 110 and the tab film 210 are flush with each other, the metal sheet 110 has a welding end 111 and a connection end 112, and the tab film 210 is formed on one side surface of the connection end 112. The tab structure is produced through the tab material belt structure, the material belt is simple to prepare, the production difficulty is small, and the production efficiency of an enterprise is effectively improved.

The tab structure is applied to the production of the button cell, so that the tab film 210 in the tab structure replaces the traditional gummed paper part, the tab film 210 is utilized to realize the insulation effect, the width of the tab film 210 is conveniently controlled, the poor sealing phenomenon in the production process of the button cell is effectively prevented, and the production quality of products is improved.

Please refer to fig. 4, fig. 6 and fig. 7.

In another embodiment, the metal tape 100 of the tab material tape structure includes a plurality of metal sheets 110, wherein the plurality of metal sheets 110 are connected with a plurality of tab films 210 in an alternating manner, so that the tab material tape structure performs a tab cutting process to form a desired tab structure, which is simpler and easier, and more specifically, a first knife is cut in a gap area between two adjacent tab films 210, and a second knife is cut in a gap area between two adjacent metal sheets 110, and the tab structure produced by the tab material tape structure, wherein one end of the tab film 210 exceeds the metal sheets 110, so that when the tab structure is applied to a button battery production, the tab film 210 effectively ensures a covering effect on the connecting end 112 of the metal sheet 110, so that in a subsequent processing application, an insulation effect between the metal sheets 110 and a battery cell body, and further effectively improves stability of the product.

Example 2

Please refer to fig. 8.

The utility model provides a pole piece structure, which is mainly used for winding to form a battery cell, and mainly comprises: pole piece 300, insulating adhesive tape 400 and the utmost point ear structure that forms of cutting through preceding utmost point ear material area structure, utmost point ear structure includes sheetmetal 110 and utmost point ear film 210, sheetmetal 110 has welding end 111 and link 112, pole piece 300 has material district 310 and empty foil district 320, sheetmetal 110 welds in the empty foil district 320 of pole piece 300 through welding end 111, utmost point ear film 210 takes shape in the link 112 unilateral surface of sheetmetal 110, insulating adhesive tape 400 laminates in the surface of welding end 111, insulating adhesive tape 400 one end extends along utmost point ear film 210 direction, insulating adhesive tape 400 covers the tip that utmost point ear film 210 is close to pole piece 300 at least, thereby prevent that burr and the sheetmetal 110 edge burr that the welding produced from coiling to pole piece 300 and causing the influence, guarantee the production quality of product.

The electrode core structure is formed by winding the electrode piece structure, wherein the connecting end 112 of the metal sheet 110 of the tab structure adopts the tab film 210 to replace the traditional adhesive tape part, so that when the electrode core structure is applied to the production of the button cell, the phenomenon of poor sealing performance in the production process of the button cell is effectively prevented, and the production quality of products is improved.

In one embodiment, the tab film 210 covers at least the connection end 112, for example, the tab film 210 and the connection end 112 are overlapped, and for example, the edge of the tab film 210 exceeds the connection end 112, so as to effectively ensure the coverage of the tab film 210 on the connection end 112, and further ensure the insulation effect between the metal sheet 110 and the cell body.

Example 3

Please refer to fig. 9.

The utility model provides a battery, which mainly comprises an upper shell 500, a lower shell 600, a sealing rubber ring 700 and a battery cell structure formed by winding the pole piece structures, wherein the upper shell 500 is pressed to the lower shell 600 to form a containing space, the sealing rubber ring 700 is positioned between the upper shell 500 and the lower shell 600, the battery cell structure is arranged in the containing space and is provided with two pole piece structures, the battery cell structure is respectively connected with the upper shell 500 and the lower shell 600 through the exposed parts of metal sheets 110 of the two pole piece structures, and concretely, the welding between the metal sheets 110 and the upper shell 500 or the lower shell 600 is realized through an external double-needle welding process, so that the two pole piece structures of the battery cell structure are connected with the upper shell 500 and the lower shell 600 of the battery.

In conclusion, the tab structure in the utility model adopts the tab film to replace the traditional adhesive tape part to realize the insulation effect, and the tab film has the processing capability which is easier to control, so that the problem that the width of the tab film 210 exceeds the metal sheet too much to influence the sealing of the battery is effectively prevented, the occurrence of poor sealing performance in the production process of the battery is effectively reduced, and the production quality of the product is improved; utilize the package material area that utmost point ear material area structure formed simultaneously, effectively reduce the production degree of difficulty of production utmost point ear structure, and then effectively improve the production efficiency of enterprise.

In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are used based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

While the utility model has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, all such alternatives, modifications, and variations are intended to be included within the spirit and scope of the present invention.

Claims (6)

1. A pole piece structure, comprising: pole piece, insulated adhesive paper and utmost point ear structure, utmost point ear structure includes: sheetmetal and utmost point ear film, the sheetmetal has welding end and link, the sheetmetal passes through the welding end and welds in the pole piece, utmost point ear film shaping is in link unilateral surface, the adhesive tape laminates in the welding end surface, adhesive tape one end is followed utmost point ear film direction extends, the adhesive tape covers at least utmost point ear film is close to the tip of pole piece.

2. The pole piece structure of claim 1 wherein said tab film covers at least the attachment end.

3. The pole piece structure of claim 2 wherein said tab film edge extends beyond said connecting end.

4. The pole piece structure of claim 1 wherein said tab structure is formed by cutting a tab tape structure comprising: strap and shaping in the utmost point ear glue film of the same surface of strap, utmost point ear glue film includes: a plurality of tab films distributed at intervals.

5. The pole piece structure of claim 4 wherein the metal strap comprises: and the plurality of metal sheets are alternately connected with the plurality of tab films.

6. A battery, comprising: the battery cell structure comprises an upper shell, a lower shell, a sealing rubber ring and a battery cell structure formed by winding the pole piece structure according to any one of claims 1 to 5, wherein the upper shell is pressed to the lower shell to form a containing space, the sealing rubber ring is positioned between the upper shell and the lower shell, the battery cell structure is arranged in the containing space, the battery cell structure is provided with two pole piece structures, and the battery cell structure is respectively connected with the upper shell and the lower shell through metal sheets of the two pole piece structures.

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