CN214957259U - Utmost point ear structure, laminate polymer battery and battery module - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a tab structure, a soft-packaged battery and a battery module, wherein the tab structure comprises a tab main body and tab glue, a first end of the tab main body extends outwards to form a first extending part, a second end of the tab main body extends outwards to form a second extending part, and the thickness of the first extending part is gradually decreased along the direction far away from the first end side; and/or the thickness of the second extension part is gradually reduced along the direction far away from the first end side, and the tab glue covers the tab main body, the first extension part and the second extension part. The utility model provides a holistic cross sectional area of utmost point ear structure is bigger, can pass through the heavy current, and the calorific capacity of utmost point ear structure during operation is lower, and electric core capacity loss is littleer, the life cycle extension, more is fit for the requirement of battery at high-power quick charge. One end of the first extension part and/or the second extension part is thicker, and the other end of the first extension part and/or the second extension part is thinner, so that the whole lug structure and the sealed edge of the aluminum plastic film can be conveniently packaged, and the safety is higher.

Description

Utmost point ear structure, laminate polymer battery and battery module

Technical Field

The utility model relates to the technical field of batteries, especially, provide a utmost point ear structure, have this utmost point ear structure's laminate polymer battery and have this laminate polymer battery's battery module.

Background

With continuous competition of the new energy automobile industry, the requirements of users on the cruising ability and the quick charging ability of new energy automobiles are higher and higher, and the attention degree of each large automobile enterprise on quick charging is also increased year by year.

The battery needs to realize quick charging without causing excessive temperature rise of the tabs. The tab is generally composed of a metal band and a tab glue, the metal band plays a role in current conduction, generally, the positive electrode adopts aluminum metal, and the negative electrode adopts nickel metal or copper nickel plating material. The tab glue mainly plays an insulating role, so that the short circuit between the aluminum plastic film and the tab is avoided, and meanwhile, the tab glue and the inner layer of the aluminum plastic film are hot-melted to play a sealing role.

The traditional lug metal belt cannot meet the overcurrent strength in the rapid charging process, and the heat generated in the high-power rapid charging process can cause the adverse effects of accelerating the capacity loss of a battery core, shortening the cycle life, sealing failure of an aluminum-plastic film, melting of a diaphragm, expansion of a battery, even fire and explosion.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a utmost point ear structure aims at solving the current utmost point ear structure and can't satisfy the problem of filling requirement and security fast simultaneously.

In order to achieve the above object, the utility model adopts the following technical scheme: a tab structure comprises a tab main body and tab glue, wherein the tab main body is provided with a first end side and a second end side which are oppositely arranged along the width direction, the first end side of the tab main body extends outwards to form a first extending part, the second end side of the tab main body extends outwards to form a second extending part, and the thickness of the first extending part is gradually reduced along the direction far away from the first end side; and/or the thickness of the second extension part is gradually reduced along the direction far away from the first end side, and the tab glue covers the tab main body, the first extension part and the second extension part.

The utility model has the advantages that: the utility model provides a pole ear structure, on the basis of the structure of a pole ear main body, a first extending part and a second extending part are respectively added on the first end side and the second end side, thereby increasing the integral section area of the tab structure, reducing the resistance of the tab structure, preparing for passing large current, therefore, the electrode lug structure has lower heat productivity during working, less cell capacity loss and prolonged cycle life, is more suitable for the requirement of high-power quick charging of the battery, and the thickness of the first extension part and/or the thickness of the second extension part are in a decreasing trend, namely, one end is thicker and the other end is thinner, and the thicker end is connected with the tab main body, thus being convenient for the integral tab structure and the sealed edge of the aluminum plastic film to be packaged, the tab glue and the sealed edge are attached more tightly after hot melting, and the whole tightness of the battery is better and safer.

In one embodiment, one end part of the first extension part close to the first end side is in smooth transition connection with the tab main body; and/or one end part of the second extension part close to the second end side is in smooth transition connection with the pole lug main body.

By adopting the technical scheme, the first extension part and/or the second extension part are in smooth transition connection with the tab main body, namely the corner angle feeling of the joint of the first extension part and/or the second extension part is reduced, so that the impact on the aluminum plastic film is smaller, and the packaging effect is better.

In one embodiment, the first extension part is provided with a first end face and a second end face which are oppositely arranged in the thickness direction, the first end face is in smooth transition connection with the tab main body, and the second end face is inclined towards the first end face; or the second end surface is in smooth transition connection with the tab main body, and the first end surface inclines towards the second end surface; or the first end face and the second end face incline oppositely, and/or the second extending part is provided with a third end face and a fourth end face which are oppositely arranged in the thickness direction, the third end face is in smooth transition connection with the tab main body, and the fourth end face inclines towards the third end face; or the fourth end surface is in smooth transition connection with the tab main body, and the third end surface inclines towards the fourth end surface; or the third end surface and the fourth end surface incline oppositely.

By adopting the technical scheme, according to actual requirements, the inclination directions of the first end surface and the second end surface of the first extension part can be adaptively adjusted, and/or the inclination directions of the third end surface and the fourth end surface of the second extension part can be adaptively adjusted, namely, the corner angle feeling of the joint of the first end surface and the second end surface is reduced, so that the impact on the aluminum plastic film is smaller, and the packaging effect is better.

In one embodiment, the thickness of the tab body increases first and then decreases in a direction from the first end side to the second end side.

By adopting the technical scheme, the sectional area of the tab main body is correspondingly increased, and the integral resistance value of the tab structure is further reduced, so that the overcurrent capacity of the tab structure is improved, and the mechanical performance of the tab structure is also improved.

In one embodiment, the top end surface and/or the bottom end surface of the tab main body are provided with concave-convex structures.

Through adopting above-mentioned technical scheme, on the same way, the holistic resistance value of utmost point ear structure is further reduced in the also corresponding increase of cross sectional area of utmost point ear main part to improve utmost point ear structure's overcurrent capacity, simultaneously, concave-convex structure has increased the area of contact of utmost point ear main part with utmost point ear glue, like this, better with the encapsulation leakproofness of plastic-aluminum membrane.

In one embodiment, the cross-sectional profile of the tab glue is matched with the cross-sectional profiles of the tab main body, the first extension part and the second extension part.

Through adopting above-mentioned technical scheme, the homogeneity that utmost point ear glued is better for utmost point ear main part, first extension and second extension are inseparabler with the laminating of plastic-aluminum membrane, reduce the risk of short circuit and weeping.

In one embodiment, the thickness of the tab main body is 0.5 mm-4.0 mm; the width of the tab main body is 30-60 mm; the length of the tab main body is 35 mm-55 mm.

By adopting the technical scheme, the resistance value range of the tab main body is determined.

In one embodiment, the thickness of the first extension part is 0.1mm to 0.5 mm; and/or the thickness of the second extension part is 0.1 mm-0.5 mm.

By adopting the technical scheme, the resistance value ranges of the first extension part and the second extension part are determined

The application still provides a laminate polymer battery, including the plastic-aluminum membrane, still includes foretell utmost point ear structure, and utmost point ear structure encapsulation is connected in the plastic-aluminum membrane.

The utility model has the advantages that: the utility model provides a laminate polymer battery on the basis that has above-mentioned utmost point ear structure, can realize filling function and security performance soon higher.

The application also provides a battery module, including foretell laminate polymer battery.

The utility model has the advantages that: the utility model provides a battery module on the basis that has above-mentioned laminate polymer battery, can realize filling function and security performance soon higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a cross-sectional view of a tab structure according to a first embodiment of the present invention;

fig. 2 is a cross-sectional view of a tab structure provided in the second embodiment of the present invention;

fig. 3a and fig. 3b are cross-sectional views of a tab structure provided in a third embodiment of the present invention;

fig. 4a and 4b are cross-sectional views of a tab structure provided in a fourth embodiment of the present invention;

fig. 5a and 5b are cross-sectional views of a tab structure according to a fifth embodiment of the present invention;

fig. 6 is a cross-sectional view of a tab structure according to a sixth embodiment of the present invention;

fig. 7 is a cross-sectional view of a tab structure according to a seventh embodiment of the present invention;

fig. 8 is a cross-sectional view of the pouch battery provided by the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

the tab structure 100, the tab main body 10, the tab glue 20, the first end side 10a, the second end side 10b, the first extension 11, the second extension 12, the first end surface 111, the second end surface 112, the third end surface 121, the fourth end surface 122, the concave-convex structure 10c, and the aluminum plastic film 200.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1, a tab structure 100 provided by the present application includes a tab main body 10 and a tab glue 20. The tab main body 10 has a first end side 10a and a second end side 10b which are oppositely disposed in the width direction, where the first end side 10a and the second end side 10b are side walls in the longitudinal direction of the tab main body 10. The first end side 10a of the tab main body 10 protrudes outward to form a first extension 11, and the second end side 10b of the tab main body 10 protrudes outward to form a second extension 12, and it can be understood that the first extension 11 and the second extension 12 are portions of the tab main body 10 protruding outward in the width direction. Wherein, the thickness of the first extension part 11 is gradually decreased along the direction far away from the first end side 10 a; alternatively, the thickness of the second extension portion 12 is gradually decreased in a direction away from the first end side 10 a; alternatively, the thickness of the first extension 11 is gradually decreased in the direction away from the first end side 10a, and the thickness of the second extension 12 is gradually increased in the direction away from the first end side 10a, that is, there are the above-mentioned three cases. The tab glue 20 covers the tab main body 10, the first extension portion 11 and the second extension portion 12, namely covers the surfaces of the tab main body, the first extension portion and the second extension portion, so as to be convenient for being attached to an aluminum plastic film. It is understood that the tab structure 100 may be a positive tab or a negative tab, i.e., the tab main body 10, the first extension 11 and the second extension 12 are made of different materials. When the tab structure 100 is used as a positive electrode tab, the tab structure 100 is made of aluminum metal, and when the tab structure is used as a negative electrode tab, the tab structure 100 is made of nickel metal or copper-to-nickel metal.

The utility model provides a tab structure 100, on the structural basis of tab main body 10, add a first extension 11 and a second extension 12 respectively at its first end side 10a and second end side 10b, thereby increased the holistic cross sectional area of tab structure 100, make the resistance of tab structure 100 reduce, prepare for can passing through the heavy current, like this, the calorific capacity when tab structure 100 works is lower, the core capacity loss is less, the cycle life is prolonged, more be fit for the requirement of battery at high-power quick charge, and, the thickness of first extension 11 and/or the thickness of second extension 12 are the trend of declining, one end is thicker and the other end is thinner, and thick one end is connected to tab main body 10, like this, be convenient for tab structure 100 wholly encapsulates with the banding of plastic-aluminum membrane, namely tab glue 20 and banding after the hot melt laminating are inseparabler, the holistic leakproofness of battery is better, and is safer.

In one embodiment, the thickness of the tab body 10 is 0.5mm to 4.0 mm; the width of the tab main body 10 is 30 mm-60 mm; the length of the tab main body 10 is 35mm to 55 mm. For example, the tab body 10 may have a thickness of 0.5mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, etc.; the width of the tab main body 10 may be 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, etc.; the length of the tab body 10 is 35mm, 40mm, 45mm, 50mm, 55mm, etc. By adopting the technical scheme, the resistance value range of the tab main body 10 is determined.

In one embodiment, the thickness of the first extension 11 is 0.1mm to 0.5 mm; and/or the thickness of the second extension part 12 is 0.1 mm-0.5 mm. For example, the thickness of the first extension 11 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, or the like; the thickness of the second extension 12 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc. By adopting the above technical solution, the resistance value ranges of the first extension portion 11 and the second extension portion 12 are determined.

Referring to fig. 1 and fig. 2, one end of the first extension 11 near the first end side 10a is in smooth transition connection with the tab main body 10; alternatively, one end of the second extension portion 12 close to the second end side 10b is in smooth transition connection with the tab main body 10, or one end of the first extension portion 11 close to the first end side 10a is in smooth transition connection with the tab main body 10, and one end of the second extension portion 12 close to the second end side 10b is in smooth transition connection with the tab main body 10. That is, the two extending portions are connected with the two end sides of the tab main body 10 in a smooth transition manner, so that the corner angle feeling at the joint is reduced, and thus, when packaging, the tab structure 100 has less edge sealing impact on the aluminum plastic film, and the packaging effect is better. Here, the smooth transition means that the connection point is in a circular arc transition, and has a smooth and unobtrusive effect.

Example one

Referring to fig. 1, in the present embodiment, the first extension portion 11 has a conical cross-section; and, the second extension 12 is conical in cross-section. In this way, the first extension portion 11, the tab main body 10, and the second extension portion 12 have elliptical cross-sectional outer profiles.

Example two

Referring to fig. 2, in the present embodiment, the first extension portion 11 has a semicircular cross section; and, the second extension 12 has a semicircular cross section. In this way, the first extension 11, the tab body 10, and the second extension 12 have a cross-sectional profile in the form of a capsule. Of course, the cross-sectional profile of the tab structure 100 may also have other shapes, for example, the cross-section of the first extension 11 is conical, and the cross-section of the second extension 12 is semicircular, etc., so as to satisfy the smooth transition.

Referring to fig. 3a to 7, the first extending portion 11 has a first end surface 111 and a second end surface 112 oppositely disposed in the thickness direction, the first end surface 111 is in smooth transition connection with the tab main body 10, and the second end surface 112 is inclined toward the first end surface 111; or the second end surface 112 is in smooth transition connection with the tab main body 10, and the first end surface 111 is inclined towards the second end surface 112; or, the first end surface 111 and the second end surface 112 are inclined oppositely, and/or the second extending portion 12 has a third end surface 121 and a fourth end surface 122 oppositely arranged in the thickness direction, the third end surface 121 is in smooth transition connection with the tab main body 10, and the fourth end surface 122 is inclined towards the third end surface 121; or, the fourth end surface 122 is in smooth transition connection with the tab main body 10, and the third end surface 121 is inclined towards the fourth end surface 122; alternatively, the third end surface 121 and the fourth end surface 122 are inclined to each other.

By adopting the above technical scheme, according to actual requirements, the inclination directions of the first end surface 111 and the second end surface 112 of the first extension portion 11 can be adaptively adjusted, and/or the inclination directions of the third end surface 121 and the fourth end surface of the second extension portion 12 can be adaptively adjusted, namely, the corner angle feeling of the joint of the two portions is reduced, so that the impact on the aluminum-plastic film is smaller, and the packaging effect is better.

EXAMPLE III

Referring to fig. 3a, in the present embodiment, the first extending portion 11 has a first end surface 111 and a second end surface 112 that are oppositely disposed in the thickness direction, the first end surface 111 is in smooth transition connection with the tab main body 10, and the second end surface 112 is inclined toward the first end surface 111, that is, the cross section of the first extending portion 11 is trapezoidal. The second extending portion 12 has a third end surface 121 and a fourth end surface 122 which are oppositely arranged in the thickness direction, the fourth end surface 122 is in smooth transition connection with the tab main body 10, the third end surface 121 inclines towards the fourth end surface 122, that is, the cross section of the second extending portion 12 is trapezoidal, so that the cross section outline of the first extending portion 11, the tab main body 10 and the second extending portion 12 is square with missing diagonal corners.

Or, referring to fig. 3b, the first extending portion 11 has a first end surface 111 and a second end surface 112 opposite to each other in the thickness direction, the second end surface 112 is in smooth transition connection with the tab main body 10, and the first end surface 111 is inclined toward the second end surface 112, that is, the first extending portion 11 has a trapezoidal cross section. The second extension portion 12 has a third end surface 121 and a fourth end surface 122 which are oppositely arranged in the thickness direction, the third end surface 121 is in smooth transition connection with the tab main body 10, and the fourth end surface 122 inclines towards the third end surface 121, that is, the cross section of the second extension portion 12 is trapezoidal, so that the cross section outline of the first extension portion 11, the tab main body 10 and the second extension portion 12 is square with missing diagonal corners.

Example four

Referring to fig. 4a, in the embodiment, the first extending portion 11 has a first end surface 111 and a second end surface 112 opposite to each other in the thickness direction, the second end surface 112 is in smooth transition connection with the tab main body 10, and the first end surface 111 is inclined toward the second end surface 112, that is, the first extending portion 11 has a trapezoidal cross section. The second extension portion 12 has a third end surface 121 and a fourth end surface 122 which are oppositely arranged in the thickness direction, the fourth end surface 122 is in smooth transition connection with the tab main body 10, the third end surface 121 inclines towards the fourth end surface 122, that is, the cross section of the second extension portion 12 is trapezoidal, and thus, the cross section outline of the first extension portion 11, the tab main body 10 and the second extension portion 12 is square with the same side vertex angle missing.

Or, referring to fig. 4b, the first extending portion 11 has a first end surface 111 and a second end surface 112 that are oppositely disposed in the thickness direction, the first end surface 111 is in smooth transition connection with the tab main body 10, and the second end surface 112 is inclined toward the first end surface 111, that is, the cross section of the first extending portion 11 is trapezoidal. The second extension portion 12 has a third end surface 121 and a fourth end surface 122 which are oppositely arranged in the thickness direction, the third end surface 121 is in smooth transition connection with the tab main body 10, the fourth end surface 122 inclines towards the third end surface 121, that is, the cross section of the second extension portion 12 is trapezoidal, so that the cross section outline of the first extension portion 11, the tab main body 10 and the second extension portion 12 is square with the same side vertex angle missing.

EXAMPLE five

Referring to fig. 5a, in the present embodiment, the first extending portion 11 has a first end surface 111 and a second end surface 112 that are oppositely disposed in the thickness direction, the second end surface 112 is in smooth transition connection with the tab main body 10, and the first end surface 111 is inclined toward the second end surface 112, that is, the cross section of the first extending portion 11 is triangular. The second extending portion 12 has a third end surface 121 and a fourth end surface 122 which are oppositely arranged in the thickness direction, the fourth end surface 122 is in smooth transition connection with the tab main body 10, the third end surface 121 inclines towards the fourth end surface 122, that is, the cross section of the second extending portion 12 is triangular, so that the cross-sectional outline of the first extending portion 11, the tab main body 10 and the second extending portion 12 is trapezoidal.

Or, referring to fig. 5b, the first extending portion 11 has a first end surface 111 and a second end surface 112 that are oppositely disposed in the thickness direction, the first end surface 111 is in smooth transition connection with the tab main body 10, and the second end surface 112 is inclined toward the first end surface 111, that is, the cross section of the first extending portion 11 is triangular. The second extension portion 12 has a third end surface 121 and a fourth end surface 122 which are oppositely arranged in the thickness direction, the third end surface 121 is in smooth transition connection with the tab main body 10, the fourth end surface 122 inclines towards the third end surface 121, namely, the cross section of the second extension portion 12 is triangular, so that the cross section outlines of the first extension portion 11, the tab main body 10 and the second extension portion 12 are trapezoidal.

EXAMPLE six

Referring to fig. 6, in the present embodiment, the first extending portion 11 has a first end surface 111 and a second end surface 112 opposite to each other in the thickness direction, the first end surface 111 and the second end surface 112 are inclined oppositely, and the cross section of the first extending portion 11 is conical. The second extension portion 12 has a third end surface 121 and a fourth end surface 122 which are oppositely arranged in the thickness direction, the third end surface 121 and the fourth end surface 122 are inclined to each other, the cross section of the second extension portion 12 is conical, and the thickness of the tab main body 10 is increased first and then decreased in the direction from the first end side 10a to the second end side 10 b. In this way, the first extension 11, the tab body 10, and the second extension 12 have a rhombic cross-sectional outer shape.

EXAMPLE seven

Referring to fig. 7, in one embodiment, the tab body 10 has a concave-convex structure 10c on the top end surface and/or the bottom end surface.

Through adopting above-mentioned technical scheme, on the same way, under the condition that has concave-convex structure 10c, the sectional area of utmost point ear main part 10 also corresponding increase further reduces the holistic resistance value of utmost point ear structure 100 to improve utmost point ear structure 100's overcurrent capacity, simultaneously, concave-convex structure 10c has increased utmost point ear main part 10 and the contact area of utmost point ear glue 20, like this, and is better with the encapsulation leakproofness of plastic-aluminum membrane.

In one embodiment, the sectional profile of the tab glue 20 is adapted to the sectional profile of the tab main body 10, the first extension 11 and the second extension 12. For example, referring to fig. 3a to 7, in the first to seventh embodiments, the cross-sectional profile of the tab glue 20.

Through adopting above-mentioned technical scheme, the homogeneity of utmost point ear glue 20 is better for utmost point ear main part 10, first extension 11 and second extension 12 are inseparabler with the laminating of plastic-aluminum membrane, reduce the risk of short circuit and weeping.

In one embodiment, the cross-section of the tab glue 20 is square.

By adopting the technical scheme, the processing difficulty of the tab glue 20 is lower.

Referring to fig. 8, the present application further provides a pouch battery, which includes an aluminum plastic film 200, and further includes the tab structure 100, wherein the tab structure 100 is packaged and connected to the aluminum plastic film 200.

The utility model provides a laminate polymer battery on the basis that has above-mentioned utmost point ear structure 100, can realize filling function and security performance soon higher.

The application also provides a battery module, including foretell laminate polymer battery.

The utility model provides a battery module on the basis that has above-mentioned laminate polymer battery, can realize filling function and security performance soon higher.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a utmost point ear structure, includes utmost point ear main part and utmost point ear glue, its characterized in that: the tab main body is provided with a first end side and a second end side which are oppositely arranged along the width direction, the first end side of the tab main body extends outwards to form a first extending part, the second end side of the tab main body extends outwards to form a second extending part, and the thickness of the first extending part is gradually reduced along the direction far away from the first end side; and/or the thickness of the second extension part is gradually reduced along the direction far away from the first end side, and the tab glue covers the tab main body, the first extension part and the second extension part.

2. A tab structure as claimed in claim 1, wherein: one end part of the first extension part close to the first end side is in smooth transition connection with the tab main body; and/or one end part of the second extension part close to the second end side is in smooth transition connection with the pole lug main body.

3. A tab structure as claimed in claim 1, wherein: the first extension part is provided with a first end face and a second end face which are oppositely arranged in the thickness direction, the first end face is in smooth transition connection with the tab main body, and the second end face inclines towards the first end face; or the second end face is in smooth transition connection with the tab main body, and the first end face is inclined towards the second end face; or, the first end face and the second end face incline in opposite directions, and/or the second extension part has a third end face and a fourth end face which are oppositely arranged in the thickness direction, the third end face is in smooth transition connection with the tab main body, and the fourth end face inclines towards the third end face; or the fourth end surface is in smooth transition connection with the tab main body, and the third end surface inclines towards the fourth end surface; or the third end surface and the fourth end surface incline oppositely.

4. A tab structure as claimed in claim 2 or 3, wherein: the thickness of the tab main body increases and then decreases along the direction from the first end side to the second end side.

5. A tab structure as claimed in claim 2 or 3, wherein: the top end face and/or the bottom end face of the tab main body are/is provided with a concave-convex structure.

6. A tab structure as claimed in claim 2 or 3, wherein: the cross section outline of the tab glue is matched with the cross section outline of the tab main body, the first extension part and the second extension part.

7. A tab structure as claimed in claim 1, wherein: the thickness of the tab main body is 0.5 mm-4.0 mm; the width of the tab main body is 30-60 mm; the length of the tab main body is 35 mm-55 mm.

8. A tab structure as claimed in claim 7, wherein: the thickness of the first extension part is 0.1 mm-0.5 mm; and/or the thickness of the second extension part is 0.1 mm-0.5 mm.

9. The utility model provides a laminate polymer battery, includes plastic-aluminum membrane, its characterized in that: the tab structure of any one of claims 1 to 8 further comprising a tab encapsulated in connection with the aluminum plastic film.

10. A battery module, its characterized in that: comprising the pouch battery according to claim 9.

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