CN216563455U

CN216563455U - Knurling structure for lithium battery cover plate pole column

Info

Publication number: CN216563455U
Application number: CN202122804079.1U
Authority: CN
Inventors: 陈利广; 刘威; 张兵见
Original assignee: Zhengzhou Guangyuan Battery Material Co ltd
Current assignee: Zhengzhou Guangyuan Battery Material Co ltd
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-05-17
Anticipated expiration: 2031-11-16

Abstract

The utility model relates to a knurling structure for a lithium battery cover plate pole, which is characterized in that a knurling structure is arranged on the surface, opposite to upper plastic, of a pole, and the knurling structure is combined with an injection-molded coated upper plastic structure, so that the friction force between the upper plastic and the pole is increased after the injection molding is finished, the pole is not easy to rotate in the actual use process of a lithium battery, and the sealing performance and the overall quality of the lithium battery are not influenced.

Description

Knurling structure for lithium battery cover plate pole column

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a dovetail groove structure for encapsulating a lithium battery.

Background

The lithium battery is the most widely applied power battery in the fields of electric automobiles and the like in recent years, and has the advantages of high energy density and long service life. The shell and the cover plate are designed to be split in production, and the cover plate and the shell are sealed and filled with electrolyte after the battery core is installed in the lithium battery.

The electrode posts of the lithium battery are arranged on the cover plate, and the upper plastic and the lower plastic are respectively arranged at the positions above and below the cover plate corresponding to the electrode posts and mainly used for supporting the electrode posts and ensuring the insulativity of the electrode posts; with the improvement of the technology, part of the existing upper plastic is manufactured in an injection molding mode, the production process is that after the lower plastic, the cover plate, the pole, the sealing ring and other components are assembled, the assembled components are placed in a grinding tool, then the plastic is directly poured around the pole above the cover plate through an injection molding machine, and the upper plastic structure is formed after cooling. But this kind of mode also has certain drawback, goes up the plastic material and all is different with utmost point post, consequently can appear in later stage use not hard up influence a series of performances such as the sealing and the insulation of lithium cell between plastic and the utmost point post, goes up not hard up between plastic and the utmost point post and also can lead to utmost point post to sink, influences the normal use of lithium cell.

Disclosure of Invention

The utility model adopts the following technical scheme for realizing the aim:

a knurling structure for a lithium battery cover plate pole comprises a cover plate, upper plastic, lower plastic and a pole.

The cover plate and the lower plastic are respectively provided with a mounting hole for mounting the pole; the pole column penetrates through the lower plastic and the mounting hole in the cover plate to be mounted, the part of the pole column penetrating out of the upper part of the cover plate is fixed in a surrounding and covering mode through the upper plastic, and a sealing ring is further arranged between the pole column and the cover plate; the upper plastic is arranged on the pole in an injection molding mode, and the pole is provided with a knurled part.

The knurled part is arranged around the pole in a surrounding manner; the knurled part forms a regular concave-convex structure on the pole.

The pole is provided with an anti-falling groove, and the anti-falling groove is formed in the middle of the pole in a circle; the knurled part is arranged on the periphery of the pole above the anti-falling groove.

The bottom of the knurled part is close to the anti-drop groove, and the top of the knurled part extends upwards to be not beyond the end part of the pole.

The cover plate is provided with a toothed limiting groove, and the limiting groove is arranged around the mounting hole on the cover plate; the limiting groove does not penetrate through the cover plate downwards.

The bottom surface of the limiting groove is flush with the bottom surface of the anti-falling groove.

The cover plate is provided with an upward bulge corresponding to the mounting hole, and the lower plastic is also provided with an upward bulge corresponding to the mounting hole; the cover plate and the lower plastic bulge part form a corresponding groove below the cover plate and the lower plastic bulge part is inserted into the groove below the cover plate; the convex part is of a square structure.

The bottom of the pole is provided with a connecting sheet which is of a square structure and corresponds to the groove at the bottom of the lower plastic; when the pole is arranged in the mounting hole, the connecting sheet is embedded into the groove at the bottom of the lower plastic; the sealing ring is arranged on the pole above the connecting sheet.

The utility model adopts the technical scheme and has the following beneficial effects:

the device is provided with the knurling part on the pole, so that when the upper plastic is injected, the plastic can be filled into gaps of the concave-convex structure on the knurling part, and the upper plastic in the concave-convex structure can play a role in preventing mutual rotation between the pole and the upper plastic after the upper plastic is solidified; the anti-falling groove arranged on the pole can longitudinally support the pole after the filled plastic is cured so as to prevent the pole from sinking; and the limiting groove on the cover plate is combined, so that the effect of stabilizing the plastic and the pole is achieved integrally.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The knurling structure of the lithium battery cover plate pole shown in figure 1 comprises a cover plate 1, upper plastic 2, lower plastic 3 and a pole 4.

The cover plate 1 and the lower plastic 3 are respectively provided with a mounting hole 5 for mounting the pole 4; the pole 4 passes through the lower plastic 3 and the mounting hole 5 on the cover plate 1 for mounting, the part of the pole 4 passing through the upper part of the cover plate 1 is fixed by surrounding and coating through the upper plastic 2, and a sealing ring 6 is arranged between the pole 4 and the cover plate 1; the upper plastic 2 is arranged on the pole 4 in an injection molding mode, and the pole 4 is provided with a knurled part 7.

The knurled part 7 is arranged around the pole 4 in a surrounding manner; the knurled section 7 forms a regular concave-convex structure on the pole 4.

The pole 4 is provided with an anti-falling groove 401, and the anti-falling groove 401 is formed by arranging a ring-shaped groove in the middle of the pole 4; the knurled part 7 is arranged on the periphery of the pole 4 above the anti-falling groove 401.

The bottom of the knurled part 7 is close to the anti-falling groove 401, and the top of the knurled part 7 extends upwards and does not exceed the end of the pole 4.

The cover plate 1 is provided with a toothed limiting groove 101, and the limiting groove 101 is arranged around the mounting hole 5 on the cover plate 1; the limiting groove 101 does not penetrate the cover plate 1 downwards.

The bottom surface of the limiting groove 101 is flush with the bottom surface of the anti-falling groove 401.

An upward first bulge part 102 is arranged at a position, corresponding to the mounting hole 5, on the cover plate 1, and an upward second bulge part 301 is also arranged at a position, corresponding to the mounting hole 5, on the lower plastic 3; the cover plate 1 and the bulge of the lower plastic 3 form a corresponding groove below the cover plate, and the second bulge 301 on the lower plastic 3 is inserted into the groove below the cover plate 1; the first protruding part 102 and the second protruding part 301 have a square structure.

The bottom of the pole 4 is provided with a connecting sheet 402, the connecting sheet 402 is of a square structure, and the connecting sheet 402 corresponds to a groove at the bottom of the lower plastic 3; when the pole 4 is arranged in the mounting hole 5, the connecting sheet 402 is embedded in the groove at the bottom of the lower plastic 3; the sealing ring 6 is arranged on the pole 4 above the connecting sheet 402.

This device is at the in-process of assembly, will descend the plastic to install in the apron lower part, then insert sealing washer and utmost point post in the mounting hole from the lower part, then put into the mould with the part of having assembled to plastic injection moulding to the top of apron and the corresponding position of utmost point post.

The in-process of moulding plastics, the plastic is filled to annular knurl portion, anticreep groove and spacing in, after the plastic solidification was accomplished, the plastic of these several parts also solidifies completely and fuses with corresponding groove structure mutually, spacing inslot last plastic can prevent that it from taking place to rotate on the apron, anticreep inslot last plastic can prevent to take place the displacement vertically between utmost point post and the last plastic, the last plastic of annular knurl portion can prevent to take place to rotate between its and the utmost point post, make the apron wholly reach better stable condition. The bottom surface in the limiting groove and the bottom surface in the anti-falling groove are arranged to be in a flush state, so that the upper plastic forms a horizontal structure at the position, the shear strength of the upper plastic is enhanced, and if the upper plastic and the lower plastic are uneven, the upper plastic can generate steps at the position, and the shear strength is reduced.

Claims

1. The utility model provides a lithium battery cover plate utmost point post annular knurl structure, it includes the apron, goes up plastic, lower plastic, utmost point post, its characterized in that: the cover plate and the lower plastic are respectively provided with a mounting hole for mounting the pole; the pole column penetrates through the lower plastic and the mounting hole in the cover plate to be mounted, the part of the pole column penetrating out of the upper part of the cover plate is fixed in a surrounding and covering mode through the upper plastic, and a sealing ring is further arranged between the pole column and the cover plate; the upper plastic is arranged on the pole in an injection molding mode, and the pole is provided with a knurled part.

2. The lithium battery cover plate pole knurling structure of claim 1, which is characterized in that: the knurled part is arranged around the pole in a surrounding manner; the knurled part forms a regular concave-convex structure on the pole.

3. The lithium battery cover plate pole knurling structure of claim 2, which is characterized in that: the pole is provided with an anti-falling groove, and the anti-falling groove is formed in the middle of the pole in a circle; the knurled part is arranged on the periphery of the pole above the anti-falling groove.

4. The lithium battery cover plate pole knurling structure of claim 3, which is characterized in that: the bottom of the knurled part is close to the anti-drop groove, and the top of the knurled part extends upwards to be not beyond the end part of the pole.

5. The lithium battery cover plate pole knurling structure of claim 4, which is characterized in that: the cover plate is provided with a toothed limiting groove, and the limiting groove is arranged around the mounting hole on the cover plate; the limiting groove does not penetrate through the cover plate downwards.

6. The lithium battery cover plate pole knurling structure of claim 5, which is characterized in that: the bottom surface of the limiting groove is flush with the bottom surface of the anti-falling groove.

7. The lithium battery cover plate pole knurling structure of claim 6, which is characterized in that: the cover plate is provided with an upward bulge corresponding to the mounting hole, and the lower plastic is also provided with an upward bulge corresponding to the mounting hole; the cover plate and the lower plastic bulge part form a corresponding groove below the cover plate and the lower plastic bulge part is inserted into the groove below the cover plate; the convex part is of a square structure.

8. The lithium battery cover plate pole knurling structure of claim 7, which is characterized in that: the bottom of the pole is provided with a connecting sheet which is of a square structure and corresponds to the groove at the bottom of the lower plastic cement; when the pole is arranged in the mounting hole, the connecting sheet is embedded into the groove at the bottom of the lower plastic; the sealing ring is arranged on the pole above the connecting sheet.