阅读说明：本技术 一种电池顶盖的极耳连接结构及电池 (Utmost point ear connection structure and battery of battery top cap ) 是由 李勇军 邹武元 陈圣立 吴志康 于 2021-07-28 设计创作，主要内容包括：本发明属于电池的技术领域,具体涉及一种电池顶盖的极耳连接结构,包括第一连接件(1),用于与电池的顶盖片(8)或极柱固定连接；第二连接件(2),连接于所述第一连接件(1)；所述第一连接件(1)和所述第二连接件(2)为一体结构,所述第二连接件(2)相对于所述第一连接件(1)弯折,所述第一连接件(1)和所述第二连接件(2)之间为至少一次弯折或翻折形成的连接部(5)。本发明采用无边料的结构,能够降低生产成本,还能提高生产效率。此外,本发明还公开了一种电池。(The invention belongs to the technical field of batteries, and particularly relates to a tab connecting structure of a battery top cover, which comprises a first connecting piece (1) and a second connecting piece (8), wherein the first connecting piece is fixedly connected with a top cover plate or a pole of a battery; a second connecting member (2) connected to the first connecting member (1); the first connecting piece (1) and the second connecting piece (2) are of an integral structure, the second connecting piece (2) is bent relative to the first connecting piece (1), and a connecting part (5) formed by bending or turning over for at least one time is arranged between the first connecting piece (1) and the second connecting piece (2). The invention adopts a structure without rim charge, which can reduce the production cost and improve the production efficiency. In addition, the invention also discloses a battery.)

1. A tab connection structure of a battery top cap, comprising:

the first connecting piece (1) is used for being fixedly connected with a top cover plate (8) or a pole of the battery;

a second connecting member (2) connected to the first connecting member (1);

the first connecting piece (1) and the second connecting piece (2) are of an integral structure, the second connecting piece (2) is bent relative to the first connecting piece (1), and a connecting part (5) formed by bending or turning over for at least one time is arranged between the first connecting piece (1) and the second connecting piece (2).

2. The tab connection structure of a battery top cap as claimed in claim 1, wherein: the first connecting piece (1) and the second connecting piece (2) are both bars or plates.

3. The tab connection structure of a battery top cap as claimed in claim 1, wherein: the first connecting piece (1) and the second connecting piece (2) are both bars, and the first connecting piece (1) and/or the second connecting piece (2) are/is provided with a flattening part (3).

4. A tab connection structure of a battery top cap as set forth in claim 3, wherein: the first connecting piece (1) and the second connecting piece (2) are bent to form a columnar connecting part (5).

5. The tab connection structure of a battery top cap as claimed in claim 1, wherein: the first connecting piece (1) and the second connecting piece (2) are plates, one end of the first connecting piece (1) is turned over at least once to form a connecting portion (5), the connecting portion (5) is connected with the second connecting piece (2), and the connecting portion (5) is in the shape of an isosceles triangle.

6. The tab connection structure of a battery top cap as claimed in claim 5, wherein the folding process is: the first connecting piece (1) and the second connecting piece (2) are firstly folded for 180 degrees on the plane, and the second connecting piece (2) is folded towards the direction far away from the first connecting piece (1) to form an isosceles triangle-shaped connecting part (5).

7. A tab connection structure of a battery top cap according to claim 5 or 6, wherein: isosceles triangle has two 45 degrees angles, an isosceles triangle's a waist has extension (51), extension (51) perpendicular to the plane of first connecting piece (1) is bent 90 degrees.

8. A tab connection structure of a battery top cap according to any one of claims 1 to 6, wherein: the first connecting piece (1) is provided with a through hole (4) for a rivet to pass through.

9. A tab connection structure of a battery top cap according to claim 5 or 6, wherein: the thickness direction of the first connecting piece (1) is the same as that of the connecting part (5);

the thickness direction of the first connecting piece (1) is perpendicular to the thickness direction of the second connecting piece (2).

10. The tab connection structure of a battery top cap as claimed in claim 8, wherein: the first connecting piece (1) is provided with a sunken part (6), and the through hole (4) is formed in the bottom of the sunken part (6);

at least one end of the concave part (6) is provided with a welding hole (61) for penetration welding or ultrasonic welding.

11. A tab connection structure of a battery top cap according to any one of claims 1 to 6, wherein: the second connecting piece (2) is provided with a step part (7).

12. A tab connection structure of a battery top cap according to any one of claims 1 to 6, wherein: the first connecting piece (1) and the second connecting piece (2) are made of copper or aluminum.

13. A battery, comprising:

the top cover plate (8) is provided with a first pole column (81) and a second pole column (82);

the first pole column (81) and the top cover plate (8) are of an integrated structure, and the second pole column (82) is mounted on the top cover plate (8) through a plastic part (9);

the tab connection structure of two battery top covers according to any one of claims 1 to 12, wherein one tab connection structure is welded to the top cover sheet (8), and the other tab connection structure is fixedly connected to the bottom of the second pole (82).

Technical Field

The invention belongs to the technical field of batteries, and particularly relates to a tab connecting structure of a battery top cover and a battery.

Background

With the development of modern society and the enhancement of environmental awareness of people, more and more devices select a lithium battery as a power supply, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, so that a wide space is provided for the application and development of the lithium battery. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called batteries. The structure that electric core utmost point ear welded in utmost point post through the switching piece is used widely in the battery top cap setting always, and under the normal conditions, electric core utmost point ear is first with the switching piece surpass weld together, then arranges top cap utmost point post bottom laser welding in and realizes the electric core function.

However, for a wide battery cell with high energy density, the structural design also derives a mode of two-side tab structure, the design can not only improve the energy density of the battery cell, but also improve the manufacturing process, but also needs to design a bent structure for the tab welding part, and the bent part needs to be connected to the tab welding part, so that the structural shape is various, the mold design cannot avoid the residual materials existing during the mold discharging, and the defects of manufacturing processes such as more leftover materials, high cost and the like are caused.

Disclosure of Invention

One of the objects of the present invention is: to the not enough of prior art, provide a utmost point ear connection structure of battery top cap, adopt the structure of no rim charge, can reduction in production cost, can also improve production efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

a tab connection structure of a battery top cover comprises a first connecting piece, a second connecting piece and a tab connecting piece, wherein the first connecting piece is used for being fixedly connected with a top cover plate or a terminal of a battery; the second connecting piece is connected to the first connecting piece; the first connecting piece and the second connecting piece are of an integral structure, the second connecting piece is bent relative to the first connecting piece, and a connecting part formed by bending or turning over at least once is arranged between the first connecting piece and the second connecting piece.

As an improvement of the tab connection structure of the battery top cover, the first connecting piece and the second connecting piece are both made of bars or plates.

As an improvement of the tab connection structure of the battery top cover, the first connecting piece and the second connecting piece are both made of bars, and the first connecting piece and/or the second connecting piece are/is provided with a flattening part.

As an improvement of the tab connection structure of the battery top cover, the first connection piece and the second connection piece are bent to form a columnar connection part.

As an improvement of the tab connection structure of the battery top cover, the first connecting piece and the second connecting piece are both made of plates, one end of the first connecting piece is folded at least once to form a connecting part, the connecting part is connected with the second connecting piece, and the connecting part is in an isosceles triangle shape.

As an improvement of the pole ear connection structure of the battery top cover, the folding process is as follows: the first connecting piece and the second connecting piece are firstly folded for 180 degrees on the plane, and the second connecting piece is folded towards the direction far away from the first connecting piece to form an isosceles triangle-shaped connecting part.

As an improvement of the pole ear connection structure of the battery top cover, the isosceles triangle is provided with two 45-degree angles, one waist side of the isosceles triangle is provided with an extension part, and the extension part is bent by 90 degrees perpendicular to the plane of the first connecting piece.

As an improvement of the tab connection structure of the battery top cap according to the present invention, the first connection member is provided with a through hole for a rivet to pass through.

As an improvement of the tab connection structure of the battery top cover, one end of the first connecting piece is folded at least once to form the second connecting piece.

As an improvement of the tab connection structure of the battery top cover, a connection part formed by bending at least once is arranged between the first connection piece and the second connection piece.

As an improvement of the tab connection structure of the battery top cover, the thickness direction of the first connecting piece is the same as that of the connecting part; the thickness direction of the first connecting piece is perpendicular to the thickness direction of the second connecting piece.

As an improvement of the tab connection structure of the battery top cover, the first connecting piece is provided with a recessed portion, and the through hole is formed in the bottom of the recessed portion;

as an improvement of the tab connection structure of the battery top cap according to the present invention, at least one end of the depression is provided with a welding hole for through welding or ultrasonic welding.

As an improvement of the tab connection structure of the battery top cap according to the present invention, the second connection member is provided with a step portion.

As an improvement of the tab connection structure of the battery top cover, the first connecting piece and the second connecting piece are both made of bars or plates and made of copper or aluminum.

The invention also aims to provide a battery, which comprises a top cover plate, a first electrode post and a second electrode post, wherein the top cover plate is provided with the first electrode post and the second electrode post; the first pole column and the top cover plate are of an integrally formed structure, and the second pole column is mounted on the top cover plate through a plastic part; two tab connection structures like above-mentioned battery top cap, one of them tab connection structure welds in the top plate piece, another tab connection structure with the bottom fixed connection of second pole post.

The battery pole connecting structure has the beneficial effects that the battery pole connecting structure comprises a first connecting piece, a second connecting piece and a connecting piece, wherein the first connecting piece is fixedly connected with a top cover plate or a pole of a battery; the second connecting piece is connected to the first connecting piece; the first connecting piece and the second connecting piece are of an integral structure, the second connecting piece is bent relative to the first connecting piece, and a connecting part formed by bending or turning over at least once is arranged between the first connecting piece and the second connecting piece. Because the mould design can not avoid the surplus material existing during the mould arrangement, which causes the defects of more leftover materials, high cost and the like in the manufacturing process, the plate is bent by a preset angle to form a first connecting piece and a second connecting piece, the first connecting piece is connected with the top cover plate or the pole of the battery, the second connecting piece is fixedly connected with the pole ear on the side wall of the battery core to realize the electric connection between the pole ear and the battery core component, wherein, the plate is formed by a direct punching forming process without an outward-convex or inward-concave structure, which is beneficial to reducing the cost of the punching mould corresponding to the plate, and the surplus size after the mould is arranged can be avoided, namely, the surplus leftover materials can not be generated, then, the pole ear connecting structure can be formed by bending and/or folding, which is beneficial to simplifying the production process of the pole ear connecting structure, improving the production efficiency of the pole ear connecting structure, and the surplus leftover materials can not be generated in the bending process, play the effect of environmental protection, connecting portion and first connecting piece and second connecting piece structure as an organic whole help improving the holistic intensity of utmost point ear connection structure. The invention adopts a structure without rim charge, which can reduce the production cost and improve the production efficiency.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

FIG. 2 is a schematic structural view of the first embodiment of the present invention after being mounted on the top cover sheet.

FIG. 3 is a schematic view of the first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a third embodiment of the present invention.

FIG. 5 is a schematic structural view of a third embodiment of the present invention after being mounted on a top cover sheet.

FIG. 6 is a schematic view of the third embodiment of the present invention.

Fig. 7 is a schematic structural view of a fourth embodiment of the present invention.

FIG. 8 is a schematic structural view of the fourth embodiment of the present invention after being mounted on the top cover sheet.

Fig. 9 is a manufacturing schematic diagram of a fourth embodiment of the present invention.

Fig. 10 is a schematic structural view of a fifth embodiment of the present invention.

FIG. 11 is a schematic structural view of the fifth embodiment of the present invention after being mounted on the top cover sheet.

Fig. 12 is a schematic view of manufacturing of the fifth embodiment of the present invention.

Fig. 13 is a schematic structural diagram of one of the batteries according to the present invention.

Fig. 14 is a schematic view of another battery according to the present invention.

Wherein the reference numerals are as follows:

1-a first connector;

2-a second connector;

3-flattening part;

4-a through hole;

5-a connecting part; 51-an extension;

6-a recess; 61-welding holes;

7-a step portion;

8-top cover sheet; 81-a first pole; 82-a second pole;

9-plastic parts;

x-length direction.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail with reference to fig. 1 to 14, but the present invention is not limited thereto.

Implementation mode one

This embodiment provides a battery, including electric core subassembly, top cap subassembly and casing, wherein, the casing can be hexahedron, also can be other shapes, and the inside formation of this casing holds the chamber for hold electric core subassembly and electrolyte, the one end of casing is equipped with the opening for electric core subassembly accessible this opening is placed in holding the chamber of casing, and holds the intracavity and can be provided with a plurality of electric core subassemblies, and a plurality of electric core subassemblies are piled up each other. The housing may include a metal material, such as aluminum or aluminum alloy, and may also include an insulating material, such as plastic.

Wherein, electric core subassembly includes electric core and utmost point ear, and along length direction X, the electric core has the both sides wall of relative setting, and in this battery, the utmost point ear extends respectively to the both sides wall of electric core.

Wherein, the top cap subassembly includes top cap piece 8 and two utmost point posts, and top cap piece 8 is fixed in the opening of casing to be provided with explosion-proof mouthful, and explosion-proof mouthful department is provided with explosion-proof valve, seals electric core subassembly and electrolyte in the chamber that holds of casing, and utmost point post sets up in top cap piece 8. Wherein, two utmost point posts are respectively for being used for with the anodal utmost point post of the anodal electricity of electric core subassembly and be used for the negative pole utmost point post of being connected with the negative pole electricity of electric core subassembly. Along length direction X, the both sides of electrode core subassembly are provided with utmost point ear connection structure respectively, and utmost point ear connection structure and the anodal utmost point post fixed connection on the top cap subassembly, then are connected with the electrode core subassembly again, and negative terminal post fixed connection on another utmost point ear connection structure and the top cap subassembly is then connected with the electrode core subassembly. In this embodiment, positive pole post and top cover plate 8 also can adopt the integral type structure, with utmost point ear connection structure and top cover plate 8 fixed connection, can realize the electric connection of positive pole post and electric core subassembly.

In addition, the tab connection structure is used to electrically connect the cell assembly of the battery with the outside of the battery. Because the electric core of electric core subassembly has the both sides wall of relative setting, and utmost point ear extends from the lateral wall of electric core, and utmost point ear connection structure is used for being connected with utmost point ear, in order to reduce the size of battery, generally need buckle utmost point ear, and utmost point ear connection structure be provided with and do benefit to utmost point ear and buckle and weld.

Specifically, the top cover plate 8 is provided with a first pole 81 and a second pole 82; the first pole 81 and the top cover plate 8 are integrally formed, and the second pole 82 is mounted on the top cover plate 8 through a plastic part 9.

The pole ear connecting structure of the battery top cover comprises a first connecting piece 1 which is used for being fixedly connected with a top cover plate 8 or a pole of a battery; the second connecting piece 2 is connected to the first connecting piece 1; the first connecting piece 1 and the second connecting piece 2 are of an integral structure, and the second connecting piece 2 is bent relative to the first connecting piece 1.

Because the design of the die can not avoid the defects of the manufacturing procedures such as more leftover materials, high cost and the like caused by the residual materials existing in die arrangement, therefore, the plate is bent by a preset angle to form a first connecting piece 1 and a second connecting piece 2, the first connecting piece 1 is connected with a top cover plate 8 or a pole of the battery, the second connecting piece 2 is fixedly connected with a pole ear on the side wall of the battery core to realize the electric connection between the pole and the battery core component, wherein, the plate is formed by a direct stamping forming process without a convex or concave structure, which is beneficial to reducing the cost of the stamping die corresponding to the plate and avoiding the redundant size after the plate is arranged, unnecessary rim charge can not produce promptly, then can form utmost point ear connection structure through bending, help simplifying utmost point ear connection structure's production technology, improve utmost point ear connection structure's production efficiency, the process of bending can not produce unnecessary rim charge in addition, plays the effect of environmental protection yet.

In this embodiment, panel is linear type structure before bending, and the thickness of first connecting piece 1 equals with the thickness of second connecting piece 2 for panel before the punching press just coincide with five metals press die and carry out the punching press, can not form the unnecessary size behind the matrix, can not produce unnecessary rim charge promptly, helps reducing utmost point ear connection structure's manufacturing cost. The plate is made of a single metal or alloy material, such as copper or aluminum.

In the tab connection structure of the battery top cap according to the present invention, the second connection member 2 is provided with the step 7. Specifically, step portion 7 sets up the position that corresponds utmost point ear at second connecting piece 2, also can form through the mode of punching press, can match the shape of utmost point ear, and in some embodiments, utmost point ear has the R angle, and step portion 7 can cushion the thickness at the R angle of utmost point ear, prevents that electric core from taking place to educe lithium.

In addition, the utmost point ear connection structure of this embodiment can be used for connecting the utmost point ear of anodal post and electric core, because anodal post and top cap piece 8 also adopt the integral type structure, anodal post makes progress protruding formation by top cap piece 8, utmost point ear connection structure can adopt direct and top cap piece 8 fixed connection, top cap piece 8 is provided with the recess with first connecting piece 1 complex, make first connecting piece 1 can imbed the bottom to top cap piece 8, help reducing the holistic height of top cap subassembly, improve the inside space utilization of battery, thereby improve the quality of battery, also can not have the recess, direct mode through penetrating the welding welds in the top cap piece, the simplified structure, and the production cost is reduced.

Second embodiment

The difference from the first embodiment is that: the first connecting piece 1 and the second connecting piece 2 of the present embodiment are both plates, the plates are L-shaped structures, and the first connecting piece 1 is provided with a through hole 4 for a rivet to pass through. Specifically, first connecting piece 1 and second connecting piece 2 are the panel of L type before bending, promptly before bending, first connecting piece 1 and second connecting piece 2 are in same plane, and both mutually perpendicular, after bending, the plane at first connecting piece 1 place perpendicular to the plane at second connecting piece 2 place, make first connecting piece 1 and top cap piece 8 parallel, be convenient for weld together with the second utmost point post 82 of top cap piece 8, second connecting piece 2 extends toward the direction of electric core, play the effect of connecting utmost point ear and second utmost point post 82, wherein, first connecting piece 1 sets up through-hole 4, supply the rivet on the second utmost point post 82 to pass, play the effect of fixed second utmost point post 82 and first connecting piece 1, second connecting piece 2 also can form step portion 7 through the mode of punching press, match the shape of utmost point ear, prevent that electric core from taking place to analyse lithium.

In addition, the utmost point ear connection structure of this embodiment can be used for connecting the utmost point ear of negative pole post and electric core, and at least one plastic part 9 is established to second utmost point post 82 cover promptly, plays the effect of insulating second utmost point post 82 and top cap piece 8, and plastic part 9 includes but not limited to last plastic part, sealing washer and plastic part down, and it can to satisfy fixed second utmost point post 82. The bottom of plastic part is provided with the recess that supplies the embedding of first connecting piece 1 down, helps reducing the holistic height of top cap subassembly, improves the inside space utilization of battery to improve the quality of battery.

Other structures are the same as those of the first embodiment, and are not described herein again.

Third embodiment

The difference from the first embodiment is that: the first connecting piece 1 and the second connecting piece 2 of the present embodiment are both bars, the first connecting piece 1 and/or the second connecting piece 2 are provided with the flattening portion 3, and the first connecting piece 1 is provided with the through hole 4 for the rivet to pass through. Specifically, before bending, the bars are in a linear structure or a strip-shaped columnar structure, the outer diameters of the bars are equal, after bending, the two ends of the bar are mutually vertical, and the bar is inconvenient to be connected with the polar ear or the polar pole because the contact area of the bar and other parts is small, therefore, the first connecting piece 1 and the second connecting piece 2 with larger contact areas are respectively formed by flattening the two ends of the bar, the contact areas of the first connecting piece 1 and the second connecting piece 2 with other parts are increased, the overcurrent capacity of the tab connection structure is improved, the performance of the battery is improved, wherein, the plane of the first connecting piece 1 is vertical to the plane of the second connecting piece 2, the first connecting piece 1 and the second connecting piece 2 are connected by a columnar connecting part 5, since the portion is also the same as the outer diameter of the bar before bending, the strength of the portion does not change much, which contributes to improving the strength of the entire connection structure. Wherein, first connecting piece 1 also sets up through-hole 4, supplies the rivet on the second utmost point post 82 to pass, plays the effect of fixed second utmost point post 82 and first connecting piece 1, and second connecting piece 2 also can form step portion 7 through the mode of punching press, matches the shape of utmost point ear, prevents that electric core from taking place to analyse lithium. The bar is made of a single metal or alloy material, such as copper or aluminum.

In addition, the utmost point ear connection structure of this embodiment can be used for connecting the utmost point ear of negative pole post and electric core, and at least one plastic part 9 is established to second utmost point post 82 cover promptly, plays the effect of insulating second utmost point post 82 and top cap piece 8, and plastic part 9 includes but not limited to last plastic part, sealing washer and plastic part down, and it can to satisfy fixed second utmost point post 82. The bottom of plastic part is provided with the recess that supplies first connecting piece 1 and bar-shaped structure embedding down, helps reducing the holistic height of top cap subassembly, improves the inside space utilization of battery to improve the quality of battery.

Other structures are the same as those of the first embodiment, and are not described herein again.

Embodiment IV

The difference from the first embodiment is that: the first connecting piece 1 and the second connecting piece 2 of the embodiment are both plates, one end of the first connecting piece is turned over at least once to form the second connecting piece 2, the connecting part 5 formed by bending at least once is arranged between the first connecting piece 1 and the second connecting piece 2, and the thickness direction of the first connecting piece 1 is the same as that of the connecting part 5; the thickness direction of the first connecting piece 1 is perpendicular to the thickness direction of the second connecting piece 2, and the first connecting piece 1 is provided with a through hole 4 for a rivet to pass through. Specifically, before turning over, the panel is linear plate-shaped structure, turns over the process and does: the first connecting piece 1 and the second connecting piece 2 are firstly folded by 180 degrees on the plane, the second connecting piece 2 is folded and folded to form the connecting part 5 in an isosceles triangle shape towards the direction far away from the first connecting piece 1, wherein, the connecting part 5 forms a layered structure similar to a triangle, such as an isosceles triangle, one waist edge of the isosceles triangle is provided with the extending part 51, the extending part 51 is bent by 90 degrees vertical to the plane of the first connecting piece 1, the plane of the first connecting piece 1 is vertical to the plane of the second connecting piece 2, the connecting part 5 and the first connecting piece 1 are positioned on the same plane, and the extending part 51 extends from the plane to the direction of the battery cell, but the invention is not limited by the above, according to the actual production requirement, the plate can be folded for a plurality of times to improve the integral strength of the pole lug connecting structure, in addition, after the pole lug connecting structure is manufactured, the thickness direction of the first connecting piece 1 is the same as the thickness direction of the connecting part 5, the thickness direction of the first connector 1 is perpendicular to the thickness direction of the second connector 2.

In this embodiment, first connecting piece 1 also sets up through-hole 4, supplies the rivet on second utmost point post 82 to pass, plays the effect of fixed second utmost point post 82 and first connecting piece 1, and second connecting piece 2 also can form step portion 7 through the mode of punching press, matches the shape of utmost point ear, prevents that lithium is separated out to the electricity core. The plate is made of a single metal or alloy material, such as copper or aluminum.

In addition, the utmost point ear connection structure of this embodiment can be used for connecting the utmost point ear of negative pole post and electric core, and at least one plastic part 9 is established to second utmost point post 82 cover promptly, plays the effect of insulating second utmost point post 82 and top cap piece 8, and plastic part 9 includes but not limited to last plastic part, sealing washer and plastic part down, and it can to satisfy fixed second utmost point post 82. The bottom of plastic part is provided with the recess that supplies first connecting piece 1 and 5 imbeds of connecting portion down, helps reducing the holistic height of top cap subassembly, improves the inside space utilization of battery to improve the quality of battery.

Other structures are the same as those of the first embodiment, and are not described herein again.

Fifth embodiment

The fourth difference from the embodiment is that: the first connecting member 1 of the present embodiment is provided with a recessed portion 6, and the through hole 4 is provided at the bottom of the recessed portion 6; at least one end of the recess 6 is provided with a welding hole 61 for through welding or ultrasonic welding. The structure of buckling after turning over earlier that this embodiment's panel also can adopt embodiment four increases depressed part 6, can form the difference in height with top plate 8, plays the effect that equipment prevents slow-witted, and the bottom of depressed part 6 also can set up through-hole 4, be convenient for with rivet cooperation, supplies the rivet to pass, helps improving utmost point ear connection structure's steadiness, increases welding hole 61 and is convenient for with utmost point ear connection structure and top plate 8's lower surface welding together, preferably through piercing through welding or super-welding fixed connection. Step portion 7 can also be formed by the second connecting piece 2 in a stamping mode, the shape of the pole lug is matched, and lithium precipitation of the battery cell is prevented.

The folding process is as follows: the first connecting piece 1 and the second connecting piece 2 are folded to form a connecting part 5 in the shape of an isosceles triangle, the isosceles triangle is provided with two 45-degree angles, one waist side of the isosceles triangle is provided with an extending part 51, and the extending part 51 is perpendicular to the plane of the first connecting piece 1 and is bent for 90 degrees.

In addition, the utmost point ear connection structure of this embodiment can be used for connecting the utmost point ear of positive post and electric core, because positive utmost point post and top cap piece 8 adopt the integral type structure, positive utmost point post is upwards protruding by top cap piece 8 and forms, and utmost point ear connection structure can adopt direct and top cap piece 8 fixed connection, helps reducing the holistic height of top cap subassembly, improves the inside space utilization of battery to improve the quality of battery.

Other structures are the same as those of the fourth embodiment, and are not described herein again.

Battery with a battery cell

The battery of the present invention includes the tab connection structure of the battery top cover according to the first to fifth embodiments.

Specifically, the method comprises the following steps: a top cover sheet 8 provided with a first pole 81 and a second pole 82; the first pole 81 and the top cover plate 8 are of an integrated structure, and the second pole 82 is mounted on the top cover plate 8 through a plastic part 9; two tab connection structures of battery top cap like above, one of them tab connection structure welds in top plate 8, and another tab connection structure and the bottom fixed connection of second pole post 82.

Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.