CN216311929U

CN216311929U - Lithium battery cover plate pole sealing ring structure

Info

Publication number: CN216311929U
Application number: CN202122775800.9U
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: 2021-11-14
Filing date: 2021-11-14
Publication date: 2022-04-15
Anticipated expiration: 2031-11-14

Abstract

The utility model relates to a lithium battery cover plate pole column sealing ring structure, wherein an upward supporting ring is arranged at the center above a sealing ring, an arc-shaped sealing ring is arranged on the outer edge surface of the supporting ring, and the outer edge surface of the sealing ring is tightly attached to the hole wall of a corresponding mounting hole of a cover plate. The structure of the sealing ring is improved, and the arc-shaped sealing ring is additionally arranged on the sealing ring, so that the secondary sealing effect of the sealing ring is increased on the basis of the original primary sealing, and the sealing reliability is further improved; meanwhile, the structure can also be beneficial to the integral assembly operation of the cover plate.

Description

Lithium battery cover plate pole sealing ring structure

Technical Field

The utility model relates to the technical field of lithium battery cover plates, in particular to a sealing ring structure of a pole of a lithium battery cover plate.

Background

The lithium battery is a power battery which is most widely applied in the technical field of electric vehicles at present, has higher energy storage energy density and longer service life, and can bear higher times of charging and discharging operations.

At present, the major structure of lithium cell includes the casing, establish the apron at electric core and the casing top in the casing, is provided with positive negative electrode on the apron, and casing and apron generally separately produce, install the apron in the casing together with the electrode after again with electric core installation to the casing during the assembly at the casing top and after welding is sealed, pour into electrolyte through the notes liquid hole of reserving on the apron, then will annotate the liquid hole again and seal, make the whole sealed operational environment that forms of battery.

The utmost point post of lithium cell is generally installed on the apron through the mode of assembly, and plastic part about apron top and below and the corresponding position of utmost point post can set up carries out insulation treatment to the utmost point post, also needs sealed the processing between utmost point post and the apron, prevents revealing of electrolyte in the use. At present most lithium cell cover plate go up remembered sealed through annular sealed flat bed go on, but there are some drawbacks at the in-process of assembly, because of the riveting piece need be installed at the top when the installation of utmost point post, can give the great compressive capacity of sealing washer at the riveting in-process, very easily cause the sealing washer to become invalid like this, influence sealing performance.

Disclosure of Invention

The utility model relates to a lithium battery cover plate pole column sealing ring structure, which improves the sealing ring structure, and adds an arc-shaped sealing ring on the sealing ring, so that the sealing ring increases the secondary sealing effect on the basis of the original primary sealing, and the sealing reliability is further improved; meanwhile, the structure can also be beneficial to the integral assembly operation of the cover plate.

A pole column sealing ring structure of a lithium battery cover plate comprises a cover plate, upper plastic, lower plastic, a pole column, a riveting sheet and a sealing ring.

Mounting holes for mounting the pole are formed in the corresponding positions of the cover plate, the upper plastic and the lower plastic; the cover plate is provided with an upward bulge corresponding to the mounting hole, the corresponding lower plastic is also provided with an upward bulge, and the cover plate is matched with the bulge on the lower plastic; the pole is installed in the installation hole, the top of the pole is riveted with a riveting sheet, and upper plastic is arranged between the riveting sheet and the top of the cover plate; and a sealing ring is arranged between the pole column and the cover plate and corresponds to the mounting hole.

The bottom of the pole is provided with a connecting sheet, and when the pole is installed in the installation hole, the connecting sheet is buckled into a groove formed by the upward protrusion of the convex part of the lower plastic; the aperture of the corresponding mounting hole on the lower plastic is smaller than that of the corresponding mounting hole of the polar plate, a gap is formed between the cover plate and the connecting sheet and at the position corresponding to the lower plastic, the sealing ring is arranged in the gap,

an upward supporting ring is further arranged at the center above the sealing ring, and an arc-shaped sealing ring is arranged on the outer edge surface of the supporting ring; the outer edge surface of the sealing ring is tightly attached to the hole wall of the mounting hole corresponding to the cover plate.

The top of the upper plastic is provided with a downward depressed part, and the riveting sheet is arranged in the depressed part; an upward limiting post is arranged in the concave part, and a limiting groove corresponding to the limiting post is arranged at the lower part of the riveting sheet.

The top of the mounting hole on the cover plate is provided with a stepped groove, and the bottom of the mounting hole on the upper plastic is provided with a stepped seat corresponding to the stepped groove; the step seat is correspondingly arranged in the step groove.

The top of the support ring on the seal ring is supported to the bottom of the step seat.

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

the support ring and the corresponding arc-shaped sealing ring are arranged on the sealing ring, the riveting sheet is riveted, the sealing ring can be firstly sealed, when the pole column expands in the riveting process, the arc-shaped sealing ring is pressed, and the secondary sealing effect is formed by extrusion between the arc-shaped sealing ring and the mounting hole in the cover plate at the moment, so that the sealing effect is improved. In addition, the outer edge of the sealing ring is tightly attached to the mounting hole in the cover plate, so that the positioning is easier in the assembling process, and the assembly is facilitated.

Drawings

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

Fig. 2 is a schematic view from another angle of fig. 1.

Fig. 3 is a schematic view of a seal ring.

Fig. 4 is a cross-sectional view after installation is complete.

Detailed Description

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

The lithium battery cover plate pole tight ring structure shown in fig. 1-4 comprises a cover plate 1, an upper plastic 2, a lower plastic 3, a pole 4, a riveting sheet 5 and a sealing ring 6.

Mounting holes 7 for mounting the pole 4 are formed in the corresponding positions of the cover plate 1, the upper plastic 2 and the lower plastic 3; an upward first bulge part 101 is arranged at a position, corresponding to the mounting hole 7, on the cover plate 1, an upward second bulge part 301 is also arranged on the corresponding lower plastic 3, and the first bulge part 101 and the second bulge part 301 on the cover plate 1 and the lower plastic 3 are mutually matched; the pole 4 is installed in the installation hole 7, the top of the pole 4 is riveted with a riveting sheet 5, and an upper plastic 2 is arranged between the riveting sheet 5 and the top of the cover plate 1; and a sealing ring 6 is arranged between the pole 4 and the cover plate 1 and corresponds to the mounting hole 7.

The bottom of the pole 4 is provided with a connecting sheet 401, and when the pole 401 is installed in the installation hole 7, the connecting sheet 401 is buckled into a groove formed by the upward protrusion of the second bulge part 301 of the lower plastic 3; the aperture of the corresponding mounting hole 7 on the lower plastic 3 is smaller than that of the corresponding mounting hole 7 of the polar plate 4, a gap is formed between the cover plate 1 and the connecting sheet 401 at the position corresponding to the lower plastic 3, the sealing ring 6 is arranged in the gap,

an upward supporting ring 601 is further arranged at the center above the sealing ring 6, and an arc-shaped sealing ring 602 is arranged on the outer edge surface of the supporting ring 601; the outer edge surface of the sealing ring 602 is tightly attached to the hole wall of the corresponding mounting hole 7 of the cover plate 1.

The top of the upper plastic 2 is provided with a downward concave part 201, and the riveting sheet 5 is arranged in the concave part 201; an upward limiting column 202 is arranged in the concave part 201, and a limiting groove 501 corresponding to the limiting column 202 is arranged at the lower part of the riveting sheet 5.

The top of the mounting hole 7 on the cover plate 1 is provided with a stepped groove 102, and the bottom of the mounting hole 7 on the upper plastic 2 is provided with a stepped seat 203 corresponding to the stepped groove 102; the step seat 203 is correspondingly installed in the stepped groove 102.

The top of the support ring 601 on the sealing ring 6 is supported to the bottom of the step seat 203.

In the installation process of the device, the lower plastic and the cover plate are assembled with each other, and after the convex parts of the lower plastic and the cover plate are corresponding, the installation holes are corresponding to each other; then with the sealing washer suit on utmost point post, place the intersection of utmost point post and connection piece in, then insert utmost point post intercommunication sealing washer in the mounting hole, the connection piece cooperatees with the recess of second bellying below, in the mounting hole on the apron is inserted to the sealing ring, then will go up the plastic suit on the utmost point post of apron top, with the riveting piece riveting at the tip of utmost point post.

The riveted in-process utmost point post can drive the connection piece and upwards compress tightly, gives the certain packing force of sealing washer, makes it reach sealed effect, and simultaneously, the utmost point post takes place the inflation and can outwards expand the support ring together with the sealing ring among the riveting process, further pastes tightly with the inner wall of the mounting hole on the apron, reaches secondary seal's effect.

The cooperation of ladder groove and step seat makes the installation of going up the plastic change the location, and the cooperation of spacing post and spacing groove is injectd last plastic, prevents that it from taking place to rotate.

Claims

1. The utility model provides a lithium battery cover plate utmost point post sealing washer structure, it includes the apron, goes up plastic, lower plastic, utmost point post, riveting piece, sealing washer, its characterized in that: mounting holes for mounting the pole are formed in the corresponding positions of the cover plate, the upper plastic and the lower plastic; the cover plate is provided with an upward bulge corresponding to the mounting hole, the corresponding lower plastic is also provided with an upward bulge, and the cover plate is matched with the bulge on the lower plastic; the pole is installed in the installation hole, the top of the pole is riveted with a riveting sheet, and upper plastic is arranged between the riveting sheet and the top of the cover plate; and a sealing ring is arranged between the pole column and the cover plate and corresponds to the mounting hole.

2. The lithium battery cover plate pole sealing ring structure of claim 1, which is characterized in that: the bottom of the pole is provided with a connecting sheet, and when the pole is installed in the installation hole, the connecting sheet is buckled into a groove formed by the upward protrusion of the convex part of the lower plastic; the aperture of the corresponding mounting hole on the lower plastic is smaller than that of the corresponding mounting hole of the polar plate, a gap is formed between the cover plate and the connecting sheet and at the position corresponding to the lower plastic, and the sealing ring is arranged in the gap.

3. The lithium battery cover plate pole sealing ring structure of claim 2, which is characterized in that: an upward supporting ring is further arranged at the center above the sealing ring, and an arc-shaped sealing ring is arranged on the outer edge surface of the supporting ring; the outer edge surface of the sealing ring is tightly attached to the hole wall of the mounting hole corresponding to the cover plate.

4. The lithium battery cover plate pole sealing ring structure of claim 3, which is characterized in that: the top of the upper plastic is provided with a downward depressed part, and the riveting sheet is arranged in the depressed part; an upward limiting post is arranged in the concave part, and a limiting groove corresponding to the limiting post is arranged at the lower part of the riveting sheet.

5. The lithium battery cover plate pole sealing ring structure of claim 4, which is characterized in that: the top of the mounting hole on the cover plate is provided with a stepped groove, and the bottom of the mounting hole on the upper plastic is provided with a stepped seat corresponding to the stepped groove; the step seat is correspondingly arranged in the step groove.

6. The lithium battery cover plate pole sealing ring structure of claim 5, which is characterized in that: the top of the support ring on the seal ring is supported to the bottom of the step seat.