CN218472230U

CN218472230U - Secondary battery core top cover structure with negative pole column threads

Info

Publication number: CN218472230U
Application number: CN202221633402.1U
Authority: CN
Inventors: 张方超; 吴清泉; 何金磊
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2023-02-10
Anticipated expiration: 2032-06-27

Abstract

The utility model relates to a negative pole post screw thread secondary electricity core top cap structure, this structure is including the top cap piece of seting up the utmost point post hole, set up copper aluminium utmost point post, the spacer in the utmost point post hole and hug closely the last plastic, the sealing washer and the lower plastic of setting in top cap piece, utmost point post and spacer formation space in proper order, copper aluminium utmost point post include utmost point post copper and set up utmost point post aluminium in utmost point post copper through the screw thread. Compared with the prior art, the utility model has the advantages of the processing requires lowly, the processing cost is low, avoided having the risk of droing and riveting back more non-deformable in the use.

Description

Secondary battery cell top cover structure with negative pole column threads

Technical Field

The utility model relates to a top cap structure especially relates to a negative pole post screw thread secondary electricity core top cap structure.

Background

At present, the existing top cover negative pole column (copper-aluminum composite pole column) is composed of copper and aluminum, the aluminum part of the pole column is arranged on the upper side of the copper part of the pole column, and the connection mode is friction welding or direct processing of composite plates.

However, the existing roof structure has some problems:

the friction welding has high energy density requirement and high processing cost;

the composite board has small tensile force and stripping force, and has the risk of falling off in the use process;

the riveting position is aluminium material, has the risk of deformation after the riveting.

It is therefore desirable to provide a roof construction that solves the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a negative pole post screw thread secondary electricity core top cap structure for overcoming the defects existing in the prior art.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a negative pole post screw thread secondary electricity core top cap structure, this structure is including the top cap piece of seting up the utmost point post hole, set up copper aluminium utmost point post, the spacer in utmost point post hole and hug closely in proper order and set up last plastic, sealing washer and lower plastic in top cap piece, utmost point post and spacer formation space, copper aluminium utmost point post include utmost point post copper and set up utmost point post aluminium in utmost point post copper through the screw thread.

The upper portion and the lower part circumference of utmost point post copper all be equipped with outside arch, and the protruding length of lower part is greater than the arch on upper portion.

The middle part of the upper side of the pole copper is provided with a first groove, the middle part of the bottom surface of the first groove is provided with a second groove with the cross sectional area smaller than that of the first groove, and the side surface of the second groove is provided with a thread.

The upper side edge part of the post copper is a riveting position.

Utmost point post aluminium including integrated into one piece's connecting portion and cross-sectional area be greater than the boss of connecting portion cross-sectional area, the connecting portion side be equipped with the screw thread that the second recess matches, pass through threaded connection with the second recess.

The boss inlay and establish in the first recess of utmost point post copper, and thickness is greater than the thickness of first recess.

Lower plastic constitute by outside supporting part and inboard compressed part, the inboard compressed part and the sealing washer setting of lower plastic in the space that top cap piece and utmost point post copper formed, the sealing washer with the inboard compressed part cooperation of lower plastic paste tightly.

The upper side of the tight attaching surface of the sealing ring and the lower plastic, which is matched and tightly attached by the compressed part, is an annular inclined surface inclined from outside to inside, and the lower side of the tight attaching surface is an annular vertical surface.

Go up the plastic setting in top cap piece upside, and inboard and utmost point post copper paste tightly.

The spacer setting in the space that last plastic and utmost point post copper formed, just spacer upside and utmost point post copper upside flush.

Compared with the prior art, the utility model discloses has with following beneficial effect:

1. the copper-aluminum pole of the utility model adopts a threaded structure, the tension is larger than that of a composite board, and the energy consumption is less than that of friction welding, so that the technical effects of low processing requirement and processing cost and avoidance of falling-off risk in the use process are realized;

2. the utility model discloses a change the riveting position into copper product material part riveting, it is big to compare in aluminium material hardness, carries out more non-deformable after the riveting.

Drawings

Fig. 1 is a schematic view of a conventional pole 3D structure.

Fig. 2 is a schematic cross-sectional view of a conventional pole.

Fig. 3 is a schematic view of a conventional assembled top cover structure.

Fig. 4 is a schematic cross-sectional view of a portion of a conventional assembled overcap.

Fig. 5 is the 3D structure diagram of the copper-aluminum pole column connected by the threaded structure of the present invention.

Fig. 6 is a schematic sectional view of the copper-aluminum pole connected by the threaded structure of the present invention.

Fig. 7 is a schematic view of the assembled top cover structure of the present invention.

Fig. 8 is a schematic sectional view of the assembled top cover of the present invention.

Reference numerals: 1. the utmost point post aluminium portion of current top cap negative pole post, 2, the utmost point post copper portion of current top cap negative pole post, 3, the top cap piece, 4, the spacer, 5, go up the plastic, 6, lower plastic, 7, the sealing washer, 8, the riveting position, 9, utmost point post aluminium, 10, utmost point post copper, 11, the screw thread.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

The utility model provides a negative pole post screw thread secondary electricity core top cap structure, this structure will have the copper aluminium utmost point post of connecting by friction weld composite board now to change into the copper aluminium utmost point post that adopts the helicitic texture to connect, is about to negative pole post riveting position 8 and is changed into the partial riveting of copper product by the partial riveting of aluminium material before.

The structure comprises a top cover plate 3 provided with a pole post hole, a copper-aluminum pole post arranged in the pole post hole, a positioning piece 4, an upper plastic 5, a sealing ring 7 and a lower plastic 6, wherein the upper plastic 5, the sealing ring 7 and the lower plastic 6 are sequentially tightly attached to the top cover plate 3, the copper-aluminum pole post and the positioning piece 4 in a formed gap, and the copper-aluminum pole post is a pole post connected by adopting a threaded structure.

Copper aluminium utmost point post includes utmost point post copper 10 and sets up utmost point post aluminium 9 in utmost point post copper 10 through the screw thread, the upper portion and the lower part of utmost point post copper 10 all are equipped with outside arch, protruding length of lower part is greater than the arch on upper portion, first recess is seted up at utmost point post copper 10 upside middle part, first recess bottom surface middle part is equipped with the second recess that a cross-sectional area is less than first recess cross-sectional area, second recess side is equipped with screw thread 11, utmost point post aluminium 9 includes integrated into one piece's connecting portion and the boss that the cross-sectional area is greater than the connecting portion cross-sectional area, connecting portion are equipped with the screw thread 11 that matches with the second recess, pass through screw thread 11 with the second recess and be connected, the boss inlays to be established in first recess, and thickness is greater than first recess, utmost point post copper 10 upside edge part is riveting position 8.

Lower plastic 6 comprises outside supporting part and inboard by the compression part, and the inboard of lower plastic 6 is set up in the space that top cap piece 3 and utmost point post copper 10 formed by compression part and sealing washer 7, and sealing washer 7 is followed closely with the inboard of lower plastic 6 by the compression part cooperation, and the inboard of sealing washer 7 and lower plastic 6 is followed closely by the compression part cooperation and is pasted closely the face upside and be the cyclic annular inclined plane of outside-in slope, and the downside is cyclic annular vertical face.

Go up plastic 5 and set up in 3 upsides of top cap piece, inboard and utmost point post copper 10 paste tightly, and spacer 4 sets up in the space of last plastic 5 and utmost point post copper 10 formation, and 4 upsides of spacer flush with utmost point post copper 10 upsides.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a negative pole post screw thread secondary electric core top cap structure, its characterized in that, this structure is including top cap piece (3) of seting up the utmost point post hole, set up copper aluminium utmost point post, spacer (4) in the utmost point post hole and hug closely in proper order and set up last plastic (5), sealing washer (7) and lower plastic (6) in top cap piece (3), utmost point post and spacer (4) formation space, copper aluminium utmost point post include utmost point post copper (10) and set up utmost point post aluminium (9) in utmost point post copper (10) through the screw thread.

2. The negative pole threaded secondary cell top cap structure of claim 1, wherein outward protrusions are arranged on the upper portion and the lower portion of the pole copper (10) in the circumferential direction, and the protrusion length of the lower portion is larger than that of the upper portion.

3. The negative pole threaded secondary cell top cap structure of claim 2, wherein a first groove is formed in the middle of the upper side of the pole copper (10), a second groove with a cross-sectional area smaller than that of the first groove is formed in the middle of the bottom surface of the first groove, and threads (11) are formed in the side surface of the second groove.

4. The negative pole threaded secondary cell top cap structure of claim 3, wherein the upper side edge of the pole copper (10) is a riveting position (8).

5. The negative pole threaded secondary cell top cap structure of claim 3, wherein the pole aluminum (9) comprises an integrally formed connecting portion and a boss with a cross-sectional area larger than that of the connecting portion, and a thread (11) matched with the second groove is arranged on the side surface of the connecting portion and connected with the second groove through the thread (11).

6. The negative pole threaded secondary cell top cap structure of claim 5, wherein the boss is embedded in the first groove of the pole copper (10), and the thickness of the boss is greater than that of the first groove.

7. The negative pole threaded secondary battery core top cover structure of claim 2, wherein the lower plastic (6) is composed of an outer support part and an inner compressed part, the inner compressed part and a sealing ring (7) of the lower plastic (6) are arranged in a gap formed by the top cover plate (3) and the pole copper (10), and the sealing ring (7) is tightly attached to the inner compressed part of the lower plastic (6) in a matching manner.

8. The structure of claim 7, wherein the sealing ring (7) and the lower plastic (6) are fitted and attached by the compressed portion, and the upper side of the attachment surface is an annular inclined surface inclined from outside to inside, and the lower side of the attachment surface is an annular vertical surface.

9. The negative pole threaded secondary cell top cap structure of claim 1, wherein the upper plastic (5) is arranged on the upper side of the top cap piece (3), and the inner side of the upper plastic is tightly attached to the pole copper (10).

10. The negative pole stud thread secondary cell top cap structure of claim 9, wherein the spacer (4) is disposed in a gap formed by the upper plastic (5) and the post copper (10), and the upper side of the spacer (4) is flush with the upper side of the post copper (10).