CN216903233U

CN216903233U - Lithium battery cap

Info

Publication number: CN216903233U
Application number: CN202221396639.2U
Authority: CN
Inventors: 陈俊显
Original assignee: Guangzhou Sairui Technology Co ltd
Current assignee: Guangzhou Sairui Technology Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-07-05
Anticipated expiration: 2032-06-07

Abstract

The utility model relates to the technical field of lithium battery components, in particular to a lithium battery cap, which comprises a shell, wherein a conductive top end, an explosion-proof sheet, an insulating piece, a sealing piece and a connecting piece are sequentially arranged in the shell, a ventilation through hole for ventilation is formed in the conductive top end, a bulge is formed in the explosion-proof sheet, a sealing sheet is hermetically arranged in the sealing piece, a sealing through hole for the bulge of the explosion-proof sheet to pass through is formed in the sealing sheet, and the explosion-proof sheet is hermetically and tightly pressed on the sealing piece; be equipped with the installation through-hole on the gasket, the inside fixed mounting of installation through-hole has pressure relief mechanism. Through the structure, the pressure relief device can relieve the pressure in the lithium battery when the pressure in the lithium battery is increased under the influence of the environment, and can avoid the expansion deformation of the lithium battery shell caused by the pressure in the lithium battery.

Description

Lithium battery cap

Technical Field

The utility model relates to the technical field of lithium battery components, in particular to a lithium battery cap.

Background

The conventional lithium battery is internally provided with a plurality of raw materials and parts, wherein the protective effect is achieved by arranging the cap on the lithium battery through the cap, the cap is also called as a lithium battery protective cover, but the conventional cap is internally formed by simple aluminum sheets, and the interior of the lithium battery is relatively closed, so that the ventilation and heat dissipation between the lithium battery and the cap are poor, the lithium battery is easy to expand by heating, and when the lithium battery is heated too high, the current output is unstable, and the lithium battery is easy to explode;

the explosion of the lithium battery is avoided through adding the explosion-proof piece in the block subassembly of lithium cell among the prior art, but because the explosion-proof piece can only cause the explosion-proof piece to break after lithium cell internal pressure increases to certain degree, when having less pressure inside the lithium cell, can cause the shell of lithium cell to expand and warp, the lithium cell after the deformation is inconvenient to be installed and is used in the battery box.

SUMMERY OF THE UTILITY MODEL

Solves the technical problem

Aiming at the defects in the prior art, the utility model provides a lithium battery cap which can effectively solve the problem that the battery cap in the prior art cannot perform local pressure relief on the inside of a lithium battery.

Technical scheme

In order to achieve the purpose, the utility model is realized by the following technical scheme:

the utility model provides a lithium battery cap which comprises a shell, wherein a conductive top end, an explosion-proof sheet, an insulating piece, a sealing piece and a connecting piece are sequentially arranged in the shell, a ventilation through hole for ventilation is formed in the conductive top end, a bulge is formed in the explosion-proof sheet, a sealing sheet is hermetically arranged in the sealing piece, a sealing through hole for the bulge of the explosion-proof sheet to pass through is formed in the sealing sheet, and the explosion-proof sheet is hermetically and tightly pressed on the sealing piece;

be equipped with the installation through-hole on the gasket, the inside fixed mounting of installation through-hole has pressure relief mechanism.

Further, pressure release mechanism includes the sliding sleeve, sliding sleeve fixed mounting is inside the installation through-hole, the inside slidable mounting of sliding sleeve has sealed piece, be equipped with on the sliding sleeve and be used for the gliding support piece of sealed piece of direction, be equipped with the elastic component that is used for adjusting sealed piece and resets on the support piece, be equipped with first pressure relief groove and second pressure relief groove on the sealed piece respectively.

Further, the first pressure relief groove and the second pressure relief groove are respectively arranged at the upper end and the lower end of the sealing block.

Furthermore, the connecting sheet is provided with a connecting groove for installing and connecting the inside of the battery.

Furthermore, a sealing gasket is arranged inside the sealing through hole.

Further, the convex part of the explosion-proof sheet is welded with the connecting sheet.

Advantageous effects

Compared with the known public technology, the technical scheme provided by the utility model has the following beneficial effects:

according to the utility model, the pressure relief mechanism is arranged between the explosion-proof sheet and the lithium battery, so that pressure relief buffering can be carried out when the air pressure in the lithium battery is slightly increased through the pressure relief mechanism in the use process, and the expansion deformation of the lithium battery shell caused by the slight increase of the air pressure in the lithium battery can be avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic overall sectional view of the present invention;

FIG. 2 is a right side cross-sectional view of the present invention;

FIG. 3 is a schematic structural view of the sealing block of the present invention installed inside the sliding sleeve;

fig. 4 is a structure of a seal block of the present invention.

The reference numerals in the drawings denote: 1. a housing; 2. a conductive tip; 3. an explosion-proof sheet; 4. an insulating member; 5. a seal member; 6. connecting sheets; 601. a connecting groove; 7. sealing the sheet; 8. a pressure relief mechanism; 9. a sliding sleeve; 10. a support member; 11. a sealing block; 1101. a first pressure relief groove; 1102. a second pressure relief groove; 12. an elastic member.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be further described with reference to the following examples.

Example (b): a lithium battery cap is disclosed, as shown in figures 1-4, and comprises a shell 1, wherein a conductive top end 2, an explosion-proof sheet 3, an insulating member 4, a sealing member 5 and a connecting sheet 6 are sequentially arranged in the shell 1, the lower part of the conductive top end 2 is contacted with the upper part of the explosion-proof sheet 3 (which can be conveniently conducted), the connecting sheet 6 is provided with a connecting groove 601 for installing and connecting the inside of a battery, the conductive top end 2 is provided with a ventilation through hole for ventilation, the explosion-proof sheet 3 is provided with a bulge, the sealing sheet 5 is internally provided with a sealing sheet 7 in a sealing way, the sealing sheet 7 is provided with a sealing through hole for the bulge of the explosion-proof sheet 3 to pass through, a sealing pad is arranged in the sealing through hole, in the embodiment, the sealing pad connects the explosion-proof sheet 3 with the sealing sheet 7 in a sealing way, so that a sealed space can be formed between the explosion-proof sheet 3 and the sealing sheet 7, the space can be used as a pressure relief buffer area, and the explosion-proof sheet 3 is tightly pressed on the sealing element 5 in a sealing way; the convex part of the explosion-proof sheet 3 is welded with the connecting sheet 6 (the explosion-proof sheet 3 is electrically connected with the connecting sheet 6).

The sealing piece 7 is provided with an installation through hole, the inside of the installation through hole is fixedly provided with a pressure relief mechanism 8, the pressure relief mechanism 8 comprises a sliding sleeve 9, the sliding sleeve 9 is fixedly arranged inside the installation through hole, the inside of the sliding sleeve 9 is slidably provided with a sealing block 11, the sliding sleeve 9 is provided with a supporting piece 10 used for guiding the sliding of the sealing block 11, the supporting piece 10 is provided with an elastic piece 12 used for adjusting the resetting of the sealing block 11, the sealing block 11 is respectively provided with a first pressure relief groove 1101 and a second pressure relief groove 1102, the first pressure relief groove 1101 and the second pressure relief groove 1102 are respectively arranged at the upper end and the lower end of the sealing block 11, in the embodiment, the sealing block 11 is arranged to slide inside the sliding sleeve 9, the first pressure relief groove 1101 and the second pressure relief groove 1102 are respectively arranged at the upper end and the lower end of the sealing block 11, and when the pressure below the sealing piece 7 is larger, the sealing piece 11 is pushed to move upwards (as shown in figure 2), the space intercommunication of second pressure release groove 1102 and gasket 7 top afterwards, can be convenient carry out the pressure release to sealed piece 11 below, when the inside pressure of lithium cell sharply risees, the atmospheric pressure of gasket 7 upper and lower side all when than higher, the bellying of explosion-proof piece 3 can warp and split, and at this moment, the inside and outside air intercommunication of lithium cell.

In this embodiment, in the use, when the inside only slight atmospheric pressure that is heated or other reasons cause the lithium cell inside rises of lithium cell, can drive sealed piece 11 and slide in sliding sleeve 9 inside and carry out the pressure release to the lithium cell inside, can avoid causing lithium cell shell inflation deformation when the inside atmospheric pressure of lithium cell slightly rises.

It should be noted that, a sufficient space is left between the sealing sheet 7 and the explosion-proof sheet 3 for pressure relief, and the outer side between the sealing sheet 7 and the explosion-proof sheet 3 is sealed by the sealing member 5, during the actual production process, the space between the sealing sheet 7 and the explosion-proof sheet 3 is relatively large, and the structural diagram in the attached drawing is only used as a structural schematic diagram of the present invention.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The lithium battery cap is characterized by comprising a shell (1), wherein a conductive top end (2), an explosion-proof piece (3), an insulating piece (4), a sealing piece (5) and a connecting piece (6) are sequentially arranged in the shell (1), a ventilation through hole for ventilation is formed in the conductive top end (2), a protrusion is formed in the explosion-proof piece (3), a sealing piece (7) is hermetically arranged in the sealing piece (5), a sealing through hole for the protrusion of the explosion-proof piece to pass through is formed in the sealing piece (7), and the explosion-proof piece (3) is hermetically pressed on the sealing piece (5);

be equipped with the installation through-hole on gasket (7), the inside fixed mounting of installation through-hole has pressure release mechanism (8).

2. A lithium battery cap as claimed in claim 1, characterized in that the pressure relief mechanism (8) comprises a sliding sleeve (9), the sliding sleeve (9) is fixedly installed inside the installation through hole, a sealing block (11) is slidably installed inside the sliding sleeve (9), a supporting member (10) for guiding the sliding of the sealing block (11) is arranged on the sliding sleeve (9), an elastic member (12) for adjusting the resetting of the sealing block (11) is arranged on the supporting member (10), and a first pressure relief groove (1101) and a second pressure relief groove (1102) are respectively arranged on the sealing block (11).

3. A lithium battery cap as claimed in claim 2, characterized in that the first pressure relief groove (1101) and the second pressure relief groove (1102) are provided at the upper and lower ends of the sealing block (11), respectively.

4. A lithium battery cap as claimed in claim 1, characterized in that the connecting piece (6) is provided with a connecting groove (601) for installing and connecting the inside of the battery.

5. A lithium battery cap as claimed in claim 1, characterized in that a sealing gasket is provided inside the sealing through hole.

6. A lithium battery cap as claimed in claim 1, characterized in that the protruding part of the explosion-proof sheet (3) is welded with the connecting sheet (6).