CN216250917U

CN216250917U - Lithium battery cover plate rubber coating dovetail groove structure

Info

Publication number: CN216250917U
Application number: CN202122804032.5U
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: 2022-04-08
Anticipated expiration: 2031-11-16

Abstract

The utility model relates to a dovetail groove structure for encapsulating a lithium battery cover plate, which is characterized in that a groove inverting device is arranged on the cover plate at a position corresponding to upper plastic, when the upper plastic is molded above the cover plate in an injection molding mode, the plastic is filled in the groove inverting device, and a dovetail-shaped structure is formed after the plastic is cured, so that the connection of the upper plastic on the cover plate is firmer, and the phenomenon of falling and loosening of a pole can not occur.

Description

Lithium battery cover plate rubber coating dovetail groove structure

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. However, the method has certain disadvantages that the upper plastic material is different from the pole and the cover plate, so that a series of performances such as sealing and insulation of the lithium battery are affected due to looseness between the upper plastic and the cover plate in the later use process, and even the defect that the quality of the lithium battery is seriously affected due to falling of the upper plastic can occur.

Disclosure of Invention

The utility model relates to a dovetail groove structure for encapsulating a lithium battery cover plate, which is characterized in that a groove inverting device is arranged on the cover plate at a position corresponding to upper plastic, when the upper plastic is molded above the cover plate in an injection molding mode, the plastic is filled in the groove inverting device, and a dovetail-shaped structure is formed after the plastic is cured, so that the connection of the upper plastic on the cover plate is firmer, and the phenomenon of falling and loosening can not occur.

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

a lithium battery cover plate rubber coating dovetail groove structure 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 a limiting groove is formed in the position, corresponding to the upper plastic, on the cover plate.

The limiting groove comprises a circular groove arranged above the cover plate; the mounting holes of the groove and the cover plate are in a concentric structure, the groove wall of the groove is in an inclined arrangement mode, and the diameter of the groove bottom is larger than that of the groove top, so that the whole groove is in a dovetail structure.

The outer edge of the limiting groove is provided with tooth-shaped grooves which are uniformly distributed, the bottom surfaces of the tooth-shaped grooves are flush with the bottom surfaces of the limiting groove, and the area of the bottom of each tooth-shaped groove is larger than that of the top of each tooth-shaped groove.

Furthermore, the number of the tooth-shaped grooves is even, the length of the tooth-shaped grooves is provided with two sizes, the tooth-shaped grooves with the two sizes are arranged in a staggered mode, and the whole tooth-shaped grooves are in a staggered mode.

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 characterized in that a dovetail-shaped limiting groove is formed in the cover plate, the upper plastic is coated around the pole in an injection molding mode, and a limiting structure is formed in the limiting groove after the upper plastic is cured, so that the upper plastic can be prevented from falling off; meanwhile, the tooth-shaped grooves are formed around the limiting grooves, so that the anti-falling effect can be further improved.

Drawings

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

Fig. 2 is a schematic view of a cover plate.

Fig. 3 is a sectional view of the cover plate.

Detailed Description

The utility model will be further explained with reference to the drawings.

As shown in fig. 1, 2 and 3, the dovetail groove structure for encapsulating the lithium battery cover plate comprises a cover plate 1, an upper plastic 2, a 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 a limiting groove 101 is formed in the position, corresponding to the upper plastic 2, on the cover plate 1.

The limiting groove 101 comprises a circular groove arranged above the cover plate; the groove and the mounting hole 5 of the cover plate 1 are in a concentric structure, the groove wall of the groove is in an inclined arrangement mode, and the diameter of the groove bottom is larger than that of the groove top, so that the whole groove is in a dovetail structure.

The outer edge of the limit groove 101 is provided with tooth-shaped grooves 102 which are uniformly distributed, the bottom surfaces of the tooth-shaped grooves 102 are flush with the bottom surface of the limit groove 101, and the area of the bottom of each tooth-shaped groove 102 is larger than that of the top of the limit groove.

Further, the number of the tooth-shaped grooves 102 is even, the length of the tooth-shaped groove 102 has two dimensions, the tooth-shaped grooves 102 with the two dimensions are staggered with each other, and the whole tooth-shaped groove is in a staggered manner.

An upward first bulge part 103 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; a corresponding groove is formed below the cover plate 1 and the bulge part of the lower plastic 3, and the second bulge part 301 on the lower plastic 3 is inserted into the groove below the cover plate 1; the first protruding portion 103 and the second protruding portion 301 are both square structures.

The bottom of the pole 4 is provided with a connecting sheet 401, the connecting sheet 401 is of a square structure, and the connecting sheet 401 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 401 is embedded into the groove below the lower plastic 3; the sealing ring 6 is arranged on the pole 4 above the connecting sheet 401.

This device has set up the spacing groove of dovetail on the apron, goes up the in-process that the plastic was moulded plastics at last plastic, and the plastic fills up the spacing groove, and it is complete with the spacing groove cooperation to go up the plastic after the solidification, because the structure of dovetail, can prevent to go up deviating from of plastic.

In order to further ensure the required effect, a tooth-shaped groove is designed, so that the upper plastic can form a corresponding supporting piece in the tooth-shaped groove, and the effect of preventing the upper plastic from rotating is increased on the basis of further preventing the upper plastic from being separated. The tooth-shaped grooves are designed to be of a high-low staggered structure, so that the limiting grooves of the upper plastic on the cover plate are relatively irregularly shaped, and the anti-falling effect can be further improved.

And the groove on the lower plastic and the connecting sheet on the pole can prevent the pole and the lower plastic from rotating.

Claims

1. The utility model provides a lithium battery cover plate rubber coating dovetail 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 a limiting groove is formed in the position, corresponding to the upper plastic, on the cover plate.

2. The encapsulation dovetail groove structure of the lithium battery cover plate according to claim 1, wherein: the limiting groove comprises a circular groove arranged above the cover plate; the mounting holes of the groove and the cover plate are in a concentric structure, the groove wall of the groove is in an inclined arrangement mode, and the diameter of the groove bottom is larger than that of the groove top, so that the whole groove is in a dovetail structure.

3. The encapsulation dovetail groove structure of the lithium battery cover plate according to claim 2, wherein: the outer edge of the limiting groove is provided with tooth-shaped grooves which are uniformly distributed, the bottom surfaces of the tooth-shaped grooves are flush with the bottom surfaces of the limiting groove, and the area of the bottom of each tooth-shaped groove is larger than that of the top of each tooth-shaped groove.

4. The encapsulation dovetail groove structure of the lithium battery cover plate according to claim 3, wherein: the number of the tooth-shaped grooves is even, the length of the tooth-shaped grooves is provided with two sizes, the tooth-shaped grooves of the two sizes are arranged in a staggered mode, and the whole tooth-shaped grooves are in a staggered mode.

5. The encapsulation dovetail groove structure of the lithium battery cover plate according to claim 4, wherein: 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.

6. The lithium battery cover plate encapsulation dovetail groove structure of claim 5, wherein: 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.