CN218957953U

CN218957953U - Double explosion-proof pressure relief battery

Info

Publication number: CN218957953U
Application number: CN202320037254.5U
Authority: CN
Inventors: 方坤; 张小林; 黄恩明
Original assignee: Liju New Energy Zhongshan Co ltd
Current assignee: Liju New Energy Zhongshan Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-05-02
Anticipated expiration: 2033-01-06

Abstract

The application discloses two explosion-proof pressure release batteries includes: the battery cell, set up the battery case outside the battery cell, the setting is at battery case correspondence battery cell positive pole one end and with the explosion-proof cap of battery cell positive pole connection, can carry out the pressure release to the gas in the battery case when battery case internal pressure is great, the explosion-proof ring of setting on battery case correspondence battery cell negative pole one end tip, wherein, form first nick between explosion-proof ring and the battery case tip, this application is through setting up explosion-proof cap and explosion-proof ring respectively at the both ends of battery case, form first nick between explosion-proof ring and the battery case tip, when the too big explosion-proof cap of battery internal pressure can't in time carry out the pressure release to the gas of battery inside, high-pressure gas can also dash out the pressure release along first nick, the effect of dual explosion-proof pressure release can be reached to the battery of this application, avoid the battery internal pressure too excessively can't in time the pressure release to lead to whole battery case direct explosion to endanger personal safety.

Description

Double explosion-proof pressure relief battery

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a double explosion-proof pressure relief battery.

Background

The cylinder type lithium ion battery causes that the internal gas pressure of the lithium ion battery is too big at reasons such as overcharge, overdischarge or high temperature, and then causes the battery explosion, current battery is generally only to carry out the pressure release at the explosion-proof block of one end installation of battery, but only one end is carried out the pressure release and is still very big easily to lead to the battery to explode when the internal pressure of battery increases in the twinkling of an eye and surpasses the pressure release scope of explosion-proof block, still can't guarantee the safe in utilization of battery, and, the sealing washer of current lithium ion battery explosion-proof block simple structure, lead to after the baffle blasting, the baffle breaks away from the sealing washer can with battery housing inner wall contact and cause the risk of short circuit.

Disclosure of Invention

Object of the utility model

In order to overcome the defects, the utility model aims to provide a double explosion-proof pressure relief battery, which solves the technical problems that the prior lithium ion battery has poor pressure relief effect, cannot completely relieve pressure and is easy to explode, and cannot ensure the use safety of the battery and the risk that a separator is easy to contact with the inner wall of a battery shell to cause short circuit after explosion.

(II) technical scheme

In order to achieve the above purpose, the technical scheme provided by the application is as follows:

a dual explosion-proof pressure relief battery comprising: the battery cell is arranged outside the battery cell, the explosion-proof cover cap is arranged at one end of the battery cell corresponding to the positive electrode of the battery cell and connected with the positive electrode of the battery cell, gas in the battery cell can be decompressed when the internal pressure of the battery cell is high, and the explosion-proof ring is arranged at the end part of the battery cell corresponding to the negative electrode of the battery cell, wherein a first mark is formed between the explosion-proof ring and the end part of the battery cell, and the gas in the battery cell can be broken to decompress when the internal pressure of the battery cell exceeds a preset value;

the utility model provides a through set up explosion-proof block and explosion-proof ring respectively at battery case's both ends, form first trace between explosion-proof ring and the battery case tip, when the too big explosion-proof block of battery internal pressure can't in time carry out the pressure release to the inside gas of battery, high-pressure gas can also dash the explosion-proof ring open the high-pressure gas of battery inside and carry out the pressure release along first trace, the battery of this application can reach dual explosion-proof pressure release's effect, avoid the too big unable in time pressure release of battery internal pressure to lead to the explosion of whole battery case to produce great impact force and endanger user's personal safety.

In some embodiments, the explosion proof cap comprises: the sealing ring is connected with one end of the battery shell, the sealing ring is arranged on one side of the sealing ring and is connected with the positive electrode of the battery cell, the pressure relief hole is formed in the sealing plate, the explosion-proof piece is arranged in the middle of the sealing ring and protrudes towards one side of the sealing plate to be welded with the sealing plate, and the cover body is arranged on the other side of the sealing ring.

In some embodiments, the rupture disc comprises: the connecting part is positioned outside the protruding part and connected with the protruding part and the sealing ring, wherein a second nick is formed between the connecting part and the protruding part;

by forming the second score between the connecting portion and the protruding portion, the protruding portion can be turned up along the second score in a direction away from the separator to disengage from the separator to power off the battery when the internal pressure of the battery is large.

In some embodiments, through holes for embedding the partition boards are formed in the sealing ring at positions corresponding to the partition boards, and a plurality of limiting blocks for limiting the positions of the partition boards are arranged around the edges of the through holes at intervals in a staggered manner;

through setting up a plurality of stopper, turn up the direction that breaks away from the baffle when the bellying to and break away from the back baffle and also can not drop and cause baffle and battery case inner wall contact and take place the short circuit accident.

In some embodiments, the explosion-proof rings are multiple and are concentrically arranged, and by arranging the multiple concentric explosion-proof rings, the first notch formed by the explosion-proof rings at the central position is shorter, the stress is smaller, the high-pressure gas with smaller impact force can be burst through the first notch, the explosion-proof rings at the periphery can be burst through the high-pressure gas with larger impact force due to the longer first notch and the larger stress, and a large amount of gas with higher air pressure can be instantaneously and rapidly discharged due to the larger caliber of the burst peripheral explosion-proof rings, so that the pressure relief can be realized in time.

Drawings

FIG. 1 is a schematic view of a dual explosion-proof pressure relief battery of the present utility model from a first perspective;

FIG. 2 is a schematic diagram of a second view of a dual explosion-proof pressure relief battery of the present utility model;

FIG. 3 is a schematic diagram of a preferred embodiment of a dual explosion-proof pressure relief battery of the present utility model;

FIG. 4 is a cross-sectional view of an explosion-proof cap of a dual explosion-proof pressure relief battery of the present utility model;

fig. 5 is an exploded view of an explosion proof cap of the dual explosion proof pressure relief battery of the present utility model.

Reference numerals:

1. a battery case; 2. an explosion-proof cap; 201. a seal ring; 2011. a limiting block; 202. a partition plate; 203. explosion-proof sheet; 2031. a connection part; 2032. a boss; 204. a cover body; 3. an explosion-proof ring.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

Referring to fig. 1 and 2, the present utility model provides a dual explosion-proof pressure relief battery, comprising: the battery cell, set up at the outside battery shell 1 of battery cell, set up at battery shell 1 correspond battery cell positive pole one end and with the explosion-proof cap 2 that battery cell positive pole is connected, can carry out the pressure release to the gas in the battery shell 1 when the inside pressure of battery shell 1 is great, set up the explosion-proof ring 3 on battery shell 1 corresponds battery cell negative pole one end tip, wherein, form first nick between explosion-proof ring 3 and the battery shell 1 tip, can be when the internal gas pressure of battery shell 1 surpasses the predetermined value in the battery shell 1 gas burst carry out the pressure release.

Specifically, the explosion-proof cap 2 includes: sealing ring 201, partition 202, explosion-proof sheet 203 and cover 204. Specifically, sealing washer 201 is connected with battery case 1 one end, baffle 202 sets up and is close to electric core one side and is connected with electric core anodal at sealing washer 201, the effect of baffle 202 is to electrically conduct electric core anodal, a plurality of pressure release holes have been seted up on the baffle 202, produce high-pressure gas in battery case 1, high-pressure gas can be discharged into sealing washer 201 through the pressure release hole, explosion-proof piece 203 sets up at the sealing washer 201 middle part and to baffle 202 one side arch and baffle 202 welding, the electric current on the baffle 202 can be conducted to explosion-proof piece 203, specifically, explosion-proof piece 203 specific structure includes: a boss 2032 located at the middle position and a connection portion 2031 located outside the boss 2032, specifically, the boss 2032 is protruded in the direction of the separator 202 and welded with the separator 202, the connection portion 2031 is connected with the boss 2032 and the seal ring 201, specifically, a second score is formed between the connection portion 2031 and the boss 2032, the cover 204 is disposed at the other side of the seal ring 201 and connected with the explosion-proof sheet 203, and current on the explosion-proof sheet 203 can flow to the cover 204.

Specifically, when the internal pressure of the battery case 1 is large, high-pressure gas is discharged into the sealing ring 201 from the pressure relief hole and upwards impacts the explosion-proof piece 203, the explosion-proof piece 203 can be upwards turned along the second notch to be disconnected with the partition plate 202 for power failure under the impact force, the explosion-proof piece 203 can form a pressure relief cavity after being upwards turned, the gas is relieved, and when the volume of the pressure relief cavity cannot meet the pressure relief of the gas, the high-pressure gas can also burst the explosion-proof ring 3 for pressure relief.

Specifically, the sealing ring 201 is made of plastic, and the partition plate 202 is made of metal.

Specifically, a through hole is formed in the middle of the sealing ring 201 for embedding and installing the partition plate 202.

Referring to fig. 4, preferably, a plurality of stoppers 2011 for fixing the separator 202 are disposed at intervals up and down on the edges of the through holes, so that the separator 202 will not fall down to cause the separator 202 to contact the inner wall of the battery case when the protrusion 2032 is turned up in a direction away from the separator 202 and separated from the separator 202, thereby preventing a short-circuit accident.

Referring to fig. 3, the number of the explosion-proof rings 3 is preferably plural, the explosion-proof rings 3 are concentrically arranged, and high-pressure air pressures with different magnitudes are adapted to burst the explosion-proof rings.

It is to be understood that the above-described embodiments of the present utility model are merely illustrative of or explanation of the principles of the present utility model and are in no way limiting of the utility model. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present utility model should be included in the scope of the present utility model. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.

Claims

1. A dual explosion-proof pressure relief battery, comprising: the battery cell, set up battery shell (1) of battery cell outside, set up battery shell (1) correspond battery cell positive pole one end and with explosion-proof lid (2) that the battery cell is anodal to be connected can be in when battery shell (1) internal pressure is great gaseous in battery shell (1) is released, set up explosion-proof ring (3) on battery shell (1) correspond battery cell negative pole one end tip, wherein, explosion-proof ring (3) with form first trace between battery shell (1) tip, can be in supply Chi Waike (1) internal gas burst is released when battery shell (1) internal gas pressure surpasses the predetermined value.

2. The double explosion-proof pressure relief battery according to claim 1, wherein the explosion-proof cap (2) comprises: the battery pack comprises a sealing ring (201) connected with one end of a battery shell (1), a partition plate (202) arranged on one side of the sealing ring (201) close to a battery cell and connected with an anode of the battery cell, a pressure relief hole formed in the partition plate (202), an explosion-proof sheet (203) arranged in the middle of the sealing ring (201) and protruding towards one side of the partition plate (202) and welded with the partition plate (202), and a cover body (204) arranged on the other side of the sealing ring (201).

3. The dual explosion-proof pressure relief battery according to claim 2, wherein the rupture disc (203) comprises: a protruding part (2032) protruding towards the direction of the separator (202) and welded with the separator (202) at the middle position, and a connecting part (2031) which is positioned outside the protruding part (2032) and connected with the protruding part (2032) and the sealing ring (201), wherein a second notch is formed between the connecting part (2031) and the protruding part (2032).

4. The double explosion-proof pressure relief battery according to claim 2, wherein a through hole for embedding the separator (202) is formed in the sealing ring (201) at a position corresponding to the separator (202), and a plurality of limiting blocks (2011) for fixing the position of the separator (202) are arranged around the edge of the through hole at intervals vertically in a staggered manner.

5. The double explosion-proof pressure relief battery according to claim 1, wherein the number of the explosion-proof rings (3) is plural, and the plural explosion-proof rings (3) are concentrically arranged.