CN219457926U

CN219457926U - Battery top cap with novel explosion-proof valve

Info

Publication number: CN219457926U
Application number: CN202320339652.2U
Authority: CN
Inventors: 戈志敏; 陶琼城; 陈金龙; 李水宝; 唐姣君; 胡艳兰; 钟宇豪
Original assignee: Jiangxi Ganfeng Lienergy Technology Co Ltd
Current assignee: Jiangxi Ganfeng Lienergy Technology Co Ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-08-01
Anticipated expiration: 2033-02-28

Abstract

The utility model provides a battery top cover with a novel explosion-proof valve, which relates to the technical field of batteries, wherein an explosion-proof opening is arranged on the surface of a cover plate, and the explosion-proof valve is arranged in the explosion-proof opening; the lower plastic is arranged below the cover plate, and a sunken explosion-proof cavity is arranged on the surface of the lower plastic; the apron is equipped with built-in explosion-proof structure towards the one side of plastic down, and built-in explosion-proof structure is located between explosion-proof valve and the explosion-proof chamber, the apron constitutes top cap structure with plastic down, and top cap structure surface mounting has utmost point post and annotates the liquid hole, the explosion-proof valve comprises aluminum sheet and protection paster, built-in explosion-proof structure is located explosion-proof mouth below, and is located explosion-proof intracavity portion, and pressure impact is in the explosion-proof board, and explosion-proof board oppression spring can cushion the explosion-proof board through a plurality of springs to alleviate the impact of pressure, pressure can be shunted in the ripple position of explosion-proof board.

Description

Battery top cap with novel explosion-proof valve

Technical Field

The utility model relates to the field of batteries, in particular to a battery top cover with a novel explosion-proof valve.

Background

The secondary battery can be charged and discharged, in order to ensure the safety and reliability of the battery, the top cover of the existing secondary battery is usually provided with an explosion-proof hole, an explosion-proof sheet which plays a role in protecting the air tightness of the top cover and the battery core is welded in the explosion-proof hole, an explosion-proof valve protection patch is stuck on a boss at the opening part of the explosion-proof hole, a closed space is formed between the explosion-proof sheet and the explosion-proof valve protection patch, when the battery is unexpected due to misuse conditions such as improper charging and short circuit or exposure to severe environments such as high temperature, a large amount of gas can be generated by the battery, the temperature is rapidly increased, the explosion-proof valve is opened by the gas so as to achieve the purpose of pressure relief, and the safety performance of the battery is greatly improved due to the existence of the explosion-proof valve.

In traditional battery top cap, lower plastic corresponds the position of explosion-proof valve and is the sieve form, and this position is equipped with a plurality of holes, and when the too big blasting of electric core pressure, pressure can release to the explosion-proof valve from a plurality of holes to this reduces the impact force, but in-service use and experiment, it is far from enough to block battery impact force through porous mode, and the produced impact force of electric core still probably breaks the explosion-proof valve, and the explosion-proof performance of battery is not strong.

Disclosure of Invention

The utility model aims to provide a battery top cover with a novel explosion-proof valve, so as to solve the technical problems. To achieve the purpose, the utility model adopts the following technical scheme:

a battery top cap with a novel explosion-proof valve, comprising:

the surface of the cover plate is provided with an explosion-proof opening, and an explosion-proof valve is arranged in the explosion-proof opening;

the lower plastic is arranged below the cover plate, and a sunken explosion-proof cavity is arranged on the surface of the lower plastic;

one surface of the cover plate facing the lower plastic is provided with a built-in explosion-proof structure, and the built-in explosion-proof structure is positioned between the explosion-proof valve and the explosion-proof cavity;

through the design, the built-in explosion-proof structure is positioned in the explosion-proof cavity and can play a role in pressure buffering.

Further preferred embodiments are as follows: the cover plate and the lower plastic form a top cover structure, and a pole and a liquid injection hole are arranged on the surface of the top cover structure;

further preferred embodiments are as follows: the explosion-proof valve consists of an aluminum sheet and a protective patch;

the aluminum sheet and the protective patch play a role in pressure buffering.

Further preferred embodiments are as follows: the built-in explosion-proof structure is positioned below the explosion-proof opening and inside the explosion-proof cavity;

further: the built-in explosion-proof structure consists of an explosion-proof plate and a spring, the spring is fixed above the explosion-proof plate, and the top of the spring is fixed with the cover plate;

the explosion-proof plate blocks the impact force of explosion and the spring dampens the shock.

Further preferred embodiments are as follows: the bottom wall of the explosion-proof cavity is provided with a plurality of small holes, and the explosion-proof plate is positioned above the small holes;

according to the design, the screen-shaped explosion-proof cavity can improve explosion-proof strength.

Further preferred embodiments are as follows: the area of the explosion-proof plate is smaller than that of the explosion-proof cavity, and a plurality of corrugations are arranged on one side of the explosion-proof plate facing the small holes.

The utility model has the beneficial effects that:

1. after the pressure enters the explosion-proof cavity from the small hole, the explosion-proof plate can block the pressure, the pressure impacts the explosion-proof plate, the springs are pressed by the explosion-proof plate, and the explosion-proof plate can be damped through the springs, so that the impact of the pressure is slowed down, the pressure can be shunted at the corrugated position of the explosion-proof plate, when the corrugated of the explosion-proof plate is designed, the corrugated is preferably designed to be inclined, and the corrugated is inclined to the outer side of the explosion-proof plate, so that the pressure can be led out to the periphery through the corrugated of the explosion-proof plate;

2. the area of the explosion-proof plate is smaller than that of the explosion-proof cavity, a gap is reserved between the periphery of the explosion-proof plate and the explosion-proof cavity, pressure is guided into the gap, the impact force of the pressure is reduced, the pressure released from the battery core can be reduced through multiple buffering of the explosion-proof cavity, the built-in explosion-proof structure and the explosion-proof valve, and the risk of hurting people due to explosion of the battery core is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure assembly of the present utility model;

FIG. 2 is a schematic diagram illustrating the overall structure of the present utility model;

FIG. 3 is a schematic view of the lower plastic structure of the present utility model;

FIG. 4 is an assembled front view of the overall structure of the present utility model;

FIG. 5 is a schematic view of an explosion-proof plate structure of the present utility model;

FIG. 6 is a front view of a partial structure assembly of the present utility model;

fig. 7 is a schematic bottom view of the explosion-proof plate structure of the present utility model.

In the figure: the explosion-proof device comprises a cover plate (1), an explosion-proof port (2), an explosion-proof valve (3), lower plastic (4), an explosion-proof cavity (401), an explosion-proof plate (5) and a spring (501).

Detailed Description

Referring to fig. 1-3, a battery top cover with a novel explosion-proof valve, comprising:

the apron 1, lower plastic 4 are installed in apron 1 below, and apron 1 and lower plastic 4 constitute the top cap structure, seal electric core aluminum hull through the top cap structure, and top cap structure surface mounting has utmost point post and annotates the liquid hole, and the position that lower plastic 4 corresponds the utmost point post is equipped with the metal connection piece, and the metal connection piece top surface is connected with the utmost point post, and the bottom surface is connected with electric core tab, and the utmost point post passes through the metal connection piece and connects the electric core, can the transmission current.

Referring to fig. 2-7, an explosion-proof opening 2 is arranged on the surface of a cover plate 1, an explosion-proof valve 3 is arranged in the explosion-proof opening 2, a sinking explosion-proof cavity 401 is arranged on the surface of a lower plastic 4, and the explosion-proof cavity 401 faces the inside of a battery cell;

the bottom wall of the explosion-proof cavity 401 is provided with a plurality of small holes, when the battery core is unexpected due to misuse conditions such as improper charging and short circuit or is exposed to severe environments such as high temperature, the pressure in the battery core is released from the small holes of the explosion-proof cavity 401, the pressure can be dispersed through a plurality of small holes, the explosion of the battery caused by direct punching of the pressure is avoided, and the impact is relieved after the pressure is shunted;

further, one surface of the cover plate 1 facing the downward plastic 4 is provided with a built-in explosion-proof structure, the built-in explosion-proof structure is positioned between the explosion-proof valve 3 and the explosion-proof cavity 401, the built-in explosion-proof structure is positioned below the explosion-proof opening 2 and inside the explosion-proof cavity 401, the built-in explosion-proof structure is composed of an explosion-proof plate 5 and springs 501, the explosion-proof plate 5 is positioned above the small holes, the springs 501 are fixed above the explosion-proof plate 5, the top of the springs 501 are fixed with the cover plate 1, the explosion-proof plate 5 faces the explosion-proof cavity 401, after pressure enters the explosion-proof cavity 401 from the small holes, the explosion-proof plate 5 can block the pressure, the pressure is impacted on the explosion-proof plate 5, the explosion-proof plate 5 presses the springs 501, the number of the springs 501 is a plurality of the springs 501, and the explosion-proof plate 5 can be damped through the springs 501, so that the pressure impact is relieved;

the side of the explosion-proof plate 5 facing the small holes is provided with a plurality of waves (as shown in fig. 7), the pressure can be shunted at the wave position of the explosion-proof plate 5, and when the waves of the explosion-proof plate 5 are designed, the waves are preferably designed to be inclined, and the waves incline to the outer side of the explosion-proof plate 5, so that the pressure can be led out to the periphery through the waves of the explosion-proof plate 5;

the area of the explosion-proof plate 5 is smaller than that of the explosion-proof cavity 401, a gap is reserved between the periphery of the explosion-proof plate 5 and the explosion-proof cavity 401, pressure is guided into the gap, and the impact force of the pressure is reduced;

the pressure reaches the position of explosion-proof valve 3 at last, and explosion-proof valve 3 is by the aluminum sheet, and the aluminum sheet can resist pressure, and the protection paster preferably adopts the PET material, and the protection paster has toughness, can bulge earlier when receiving the impact, and release pressure at last, through explosion-proof cavity 401, built-in explosion-proof structure and the multiple buffering of explosion-proof valve 3, the pressure that releases in the electricity core can reduce, reduces the risk that the electricity core explodes the injury people.

Claims

1. A battery top cap with novel explosion-proof valve, characterized in that includes:

one surface of the cover plate facing the lower plastic is provided with a built-in explosion-proof structure, and the built-in explosion-proof structure is positioned between the explosion-proof valve and the explosion-proof cavity.

2. The battery top cover with novel explosion-proof valve according to claim 1, wherein: the cover plate and the lower plastic form a top cover structure, and the surface of the top cover structure is provided with a pole and a liquid injection hole.

3. The battery top cover with novel explosion-proof valve according to claim 1, wherein: the explosion-proof valve consists of an aluminum sheet and a protective patch.

4. The battery top cover with novel explosion-proof valve according to claim 1, wherein: the built-in explosion-proof structure is positioned below the explosion-proof opening and inside the explosion-proof cavity.

5. The battery top cover with novel explosion-proof valve according to claim 4, wherein: the built-in explosion-proof structure consists of an explosion-proof plate and a spring, wherein the spring is fixed above the explosion-proof plate, and the top of the spring is fixed with the cover plate.

6. The battery top cover with novel explosion-proof valve according to claim 1, wherein: the bottom wall of the explosion-proof cavity is provided with a plurality of small holes, and the explosion-proof plate is positioned above the small holes.

7. The battery top cover with novel explosion-proof valve according to claim 6, wherein: the area of the explosion-proof plate is smaller than that of the explosion-proof cavity, and a plurality of corrugations are arranged on one side of the explosion-proof plate facing the small holes.