CN214589040U

CN214589040U - Secondary battery top cover structure

Info

Publication number: CN214589040U
Application number: CN202121035483.0U
Authority: CN
Inventors: 章翔; 刘艳绒; 罗薇
Original assignee: Wuhu Etc Battery Ltd
Current assignee: Wuhu Etc Battery Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-11-02
Anticipated expiration: 2031-05-14

Abstract

The utility model discloses a secondary battery top cap structure, including top cap piece, utmost point post and plastic, be equipped with the through-hole I that supplies utmost point post to pass on the top cap piece, be equipped with convex part and concave part along the circumference of through-hole I at top cap piece upper surface, through the mode of moulding plastics, the plastic solidifies in convex part and concave part with the top cap piece interlock. The convex parts and the concave parts are arranged at intervals and are uniformly distributed around the through hole I. The structure that the concave and convex are alternated, namely the convex part and the concave part, is added on the surface of the top cover plate of the secondary battery top cover, so that the bonding surface of the plastic and the top cover plate in the direction perpendicular to the top cover plate is increased in a limited space, the deformation resistance of the battery pole when the battery pole is subjected to torsional force is increased, the capacity of the cylindrical pole for resisting torsional action is improved, and the problem that the sealing performance of the battery is influenced is avoided.

Description

Secondary battery top cover structure

Technical Field

The utility model belongs to the technical field of the new forms of energy battery, concretely relates to secondary battery top cap structure.

Background

The secondary battery generally comprises a cover plate aluminum sheet, positive and negative electrode posts, post plastic, a sealing ring and the like. Compared with other special-shaped pole columns, the cylindrical pole column is less in machining process, less in material waste and lower in cost, so that the machined pole column of the lithium ion battery at present is more provided with the cylindrical pole column.

However, due to the shape of the cylindrical pole, when the cylindrical pole is subjected to a torsional force (such as bar rotation connected in a module), the pole and the cover plate are easy to rotate relatively, and the strength and the sealing performance of the battery cover plate are affected.

SUMMERY OF THE UTILITY MODEL

To the not enough of existence among the prior art, the utility model aims to provide a secondary cell top cap structure of simple structure, convenient to use has increased the resistance to deformation ability when battery utmost point post receives the torsional force.

In order to achieve the above purpose, the technical scheme of the utility model is that: a secondary battery top cap structure, its characterized in that: including top cap piece, utmost point post and plastic, be equipped with the through-hole I that supplies utmost point post to pass on the top cap piece, be equipped with convex part and concave part along the circumference of through-hole I on the top cap piece upper surface, through the mode of moulding plastics, the plastic solidifies in convex part and concave part with the interlock of top cap piece.

Further, secondary battery top cap structure still includes plastic and sealing washer down, is equipped with the through-hole II that supplies utmost point post to pass down on the plastic, and the sealing washer cup joints and is located down between plastic and the top cap piece on supplying utmost point post, and utmost point post passes plastic, sealing washer and top cap piece down in proper order.

Furthermore, the convex parts and the concave parts are arranged at intervals and are uniformly distributed around the through hole I.

Furthermore, the bottom of utmost point post is equipped with square base, is equipped with square draw-in groove around through-hole II on the lower plastic, and when utmost point post passed down the plastic from through-hole II, square base joint was in square draw-in groove.

Furthermore, be equipped with the helicitic texture on the excircle face of utmost point post, during the moulding plastics, the plastic solidifies in the helicitic texture with utmost point post interlock.

Further, be equipped with sunkenly and protruding along the circumferencial direction on the side of utmost point post, sunken and protruding mutual interval set up, and during the moulding plastics, the plastic solidifies in sunken and protruding interlock with utmost point post.

Furthermore, the reverse side of the top cover plate is provided with a punching pit along the circumference of the through hole I.

Adopt the utility model discloses technical scheme's advantage does:

the utility model discloses the top plate is the apron aluminum sheet, through design stamping forming convex part and concave part on the apron aluminum sheet, forms unsmooth alternate structure, fixes utmost point post looks position after, through the mode of moulding plastics, makes the plastic fill in this kind of unsmooth alternate structure, and the plastic solidifies in convex part and concave part for utmost point post plastic possesses anti-rotation ability. The structure with alternate concave and convex parts can form larger plastic embedding area in limited space, and provides larger anti-twisting capability; and the concave-convex structure is complementary to the flowing of metal during stamping, so that the deformation of the aluminum plate is smaller. The plastic that moulds plastics fills in utmost point post and apron aluminum sheet's clearance, and utmost point post possesses the ability of preventing rotating after solidifying.

Drawings

The invention will be described in further detail with reference to the following drawings and detailed description:

fig. 1 is a schematic structural view of a secondary battery top cover of the present invention;

FIG. 2 is a schematic view of the reverse side of the top cover plate of the present invention;

FIG. 3 is a first schematic view of the structure of the convex portion and the concave portion of the present invention;

FIG. 4 is a schematic diagram of a second structure of the convex portion and the concave portion of the present invention;

fig. 5 is a third schematic view of the structure of the convex portion and the concave portion of the present invention.

The labels in the above figures are respectively: 1-top cover sheet; 2-pole column; 3, plastic cement; 4, plastic cement is discharged; and 5, sealing rings.

Detailed Description

In the present invention, it is to be understood that the term "length"; "Width"; "Up"; "Down"; "front"; "Back"; "left"; "Right"; "vertical"; "horizontal"; "Top"; "bottom" "inner"; "outer"; "clockwise"; "counterclockwise"; "axial"; "planar direction"; the directional or positional relationship indicated as "circumferential" or the like is based on the directional or positional relationship shown in the drawings, and is only for convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a particular orientation; constructed and operative in a particular orientation and therefore should not be construed as limiting the invention.

As shown in fig. 1 to 3, a secondary battery top cover structure comprises a top cover plate 1, a pole column 2 and plastic 3, wherein the top cover plate 1 is provided with a through hole I11 for the pole column 2 to pass through, the upper surface of the top cover plate is provided with a convex part 12 and a concave part 13 along the circumference of the through hole I11, and the plastic 3 is solidified in the convex part 12 and the concave part 13 to be occluded with the top cover plate 1 in an injection molding mode. The convex parts 12 and the concave parts 13 are arranged at intervals and evenly distributed around the through hole I11. The structure that the convex parts 12 and the concave parts 13 are arranged on the surface of the top cover plate 1 of the secondary battery top cover is used, so that the bonding surface of plastic and the top cover plate in the direction perpendicular to the top cover plate is increased in a limited space, the deformation resistance of a battery pole under the action of torsional force is increased, the capacity of the cylindrical pole against the torsional action is improved, and the problem that the sealing performance of the battery is influenced is avoided.

Inferior battery top cap structure still includes plastic 4 and sealing washer 5 down, is equipped with on the lower plastic 4 and supplies II 41 through-holes that utmost point post 2 passed, and sealing washer 5 cup joints and is located down between plastic 4 and the top cap piece 1 on supplying utmost point post 2, and utmost point post 2 passes plastic 4, sealing washer 5 and top cap piece 1 down in proper order. Lower plastic 4 is the integrative piece or the part of dividing that process earlier, plays supporting role to top cap piece 1, and top cap piece 1 is the apron aluminum sheet, and lower plastic 4 is placed and still has insulating effect between electric core and top cap piece.

For the antitorque commentaries on classics ability that improves utmost point post 2, be equipped with square base 21 in the bottom of utmost point post 2, be equipped with square draw-in groove 42 on lower plastic 4 around through-hole II 41, when utmost point post 2 passed down plastic 4 from through-hole II 41, square base 21 joint was in square draw-in groove 42. The polar column 2 can be prevented from rotating relative to the lower plastic 4, so that the polar column 2 is prevented from rotating relative to the top cover plate 1 and the plastic 3.

In order to further improve the anti-torsion capability of the pole 2, the outer circular surface of the pole 2 is provided with a thread structure 22, and during injection molding, the plastic 3 is solidified in the thread structure 22 and occluded with the pole 2. Also can be equipped with sunken and protruding along the circumferencial direction on the side of utmost point post 2, sunken and protruding mutual interval set up, and during the moulding plastics, plastic 3 solidifies in sunken and protruding with utmost point post 2 interlock. Like this plastic 3 both had been in the same place with the 1 interlock of top cap piece also with utmost point post interlock together, can not take place relative rotation between top cap piece 1, utmost point post, the plastic three, had further solved among the prior art utmost point post and had easily taken place relative rotation with the top cap piece, influenced the problem of battery apron's intensity and leakproofness.

The reverse side of top flap 1 is equipped with along the circumference of through-hole I11 and dashes hole 14, and the design of dashing the hole makes the concave-convex structure on the top flap 1 shaping more easily. In the present invention, three types are designed for the design of the convex portion 12 and the concave portion 13, as shown in fig. 3, 4 and 5, the three types of structures are slightly different and can be selected according to actual conditions; of course, the design of the projections 12 and the recesses 13 is not limited to these three forms.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without the technical solutions of the present invention, or the present invention can be directly applied to other occasions without the improvements, and all are within the protection scope of the present invention.

Claims

1. A secondary battery top cap structure, its characterized in that: including top cap piece (1), utmost point post (2) and plastic (3), be equipped with on top cap piece (1) and supply I (11) of through-hole that utmost point post (2) passed, be equipped with convex part (12) and concave part (13) along the circumference of through-hole I (11) at top cap piece upper surface, through the mode of moulding plastics, plastic (3) solidify in convex part (12) and concave part (13) with top cap piece (1) interlock.

2. A secondary battery top cover structure according to claim 1, wherein: secondary cell top cap structure still includes lower plastic (4) and sealing washer (5), is equipped with on lower plastic (4) and supplies through-hole II (41) that utmost point post (2) passed, and sealing washer (5) cup joint and lie in down between plastic (4) and top cap piece (1) on supplying utmost point post (2), and utmost point post (2) pass plastic (4), sealing washer (5) and top cap piece (1) down in proper order.

3. A secondary battery top cover structure according to claim 1, wherein: the convex parts (12) and the concave parts (13) are arranged at intervals and are uniformly distributed around the through hole I (11).

4. A secondary battery top cover structure according to claim 2, wherein: the bottom of utmost point post (2) is equipped with square base (21), is equipped with square draw-in groove (42) on lower plastic (4) around through-hole II (41), and when utmost point post (2) passed lower plastic (4) from through-hole II (41), square base (21) joint was in square draw-in groove (42).

5. A secondary battery top cap structure according to any one of claims 2 to 4, wherein: be equipped with helicitic texture (22) on the outer disc of utmost point post (2), during moulding plastics, plastic (3) solidify in helicitic texture (22) with utmost point post (2) interlock.

6. A secondary battery top cap structure according to any one of claims 2 to 4, wherein: be equipped with sunkenly and protruding along the circumferencial direction on the side of utmost point post (2), sunken and protruding mutual interval set up, and during the moulding plastics, plastic (3) solidify in sunken and protruding with utmost point post (2) interlock.

7. A secondary battery top cover structure according to claim 1, wherein: and a punching pit is arranged on the reverse side of the top cover plate (1) along the circumference of the through hole I (11).