CN206558561U

CN206558561U - A kind of cylindrical battery explosion-proof covering board

Info

Publication number: CN206558561U
Application number: CN201621143053.XU
Authority: CN
Inventors: 吴达红
Original assignee: Changsha Li Anneng Electronic Technology Co Ltd
Current assignee: Changsha Li Anneng Electronic Technology Co Ltd
Priority date: 2016-10-21
Filing date: 2016-10-21
Publication date: 2017-10-13
Anticipated expiration: 2026-10-21

Abstract

The utility model discloses a kind of cylindrical battery explosion-proof covering board, including cover plate, the cover plate is the cover plate of cylindrical battery, positive terminal or negative terminal and corresponding positive and negative terminals tag, fluid injection hole position are provided with cover plate, burst disk mounting hole site, the pressure relief opening of increasing explosion bore of the mounting hole site provided with correspondingly-shaped are additionally provided with other cover plate；Increase the burst disk that correspondingly-shaped is installed on explosion bore pressure relief opening；The utility model provides a kind of cylindrical battery explosion-proof covering board, and structure is novel；Faster speed pressure release can be realized, risk of explosion is further reduced, security performance is improved, solder yield and production efficiency is improved, production cost is greatly reduced.

Description

A kind of cylindrical battery explosion-proof covering board

Technical field

The utility model is related to column lithium ion battery explosion-proof covering board technical field, specifically a kind of cylinder type lithium battery Explosion-proof covering board.

Background technology

If Fig. 2 is common large cylindrical lithium ion battery structure figure；If Fig. 1 is common circular explosion-proof in the market The lithium battery cover plate figure of structure, as shown in Figure 1, the explosion mouthful diameter of circular venting 202 can in itself be installed by cover plate The limitation in space and bigizationner can not be accomplished；Its explosion-protection equipment be mostly use outside diameter be 0.1 for 14mm or so, thickness~ 0.2mm circular burst disk；And such a burst disk at it using for upper, also many weak points：

1. this circular burst disk, according to the requirement of mounting means and burst pressure precision, the explosion mouthful diameter at its center 6mm or so can only be typically designed, i.e., pressure relief opening circulation area only has 28mm after its explosion²Left and right；And there is safety for battery Accident, its container internal pressure drastically raises the accurate explosion of needs, and during quick pressure releasing, because of the explosion pressure release open area of burst disk It is too small, pressure release speed is influenceed, such battery still can have risk of explosion；Therefore the explosion pressure relief opening of cylinder type lithium battery is increased Circulation area, the release of the high pressure faster speed in battery can be made, so as to further avoid battery explosion, battery is improved Security.

2. for the laser welding process for assembling link from current cover plate and burst disk because thickness there was only 0.1~ 0.2mm, material compares relatively thin, and edge welding manner can not be used during laser welding, is only suitable within burst disk edge from quarter Trace line does penetration welding on nearer plan-position, easily occurs some failure weldings when so welding and triggers various quality Problem, causes very big cost allowance；Such as：Because material is thin, easily there is crafters during laser high temperature welding, cause battery Leakage；And the high temperature of weld is relative with explosion mouthful indentation too near when penetrating welding, such high temperature is easily transmitted to indentation Position, influences the precision and stability of burst pressure.

3. for design principle of current burst disk itself and production technology, its explosion open area size and explosion mouthful indentation Residual thickness be directly proportional, and the processing precise degree of residual thickness determines the precision and stability of burst pressure, so when quick-fried Break size is smaller, and remaining wall angle value is smaller with regard to relative requirement, and value is smaller to be more difficult to, and burst disk quality is more difficult to To guarantee.

Utility model content

The purpose of this utility model is to provide a kind of cylinder type lithium battery explosion-proof covering board, to solve in above-mentioned background technology The problem of proposition；It is directed to a kind of cylindrical battery explosion-proof cover structure design that can be integrated and solve every problem.

To achieve the above object, the utility model provides following technical scheme：

Principle is by increasing explosion-proof bore pressure relief opening on the basis of former explosion-proof covering board, to increase its explosion open area, This makes it possible to accelerate burst pressure release, explosion-proof blind patch is using Long Circle and the structural design drawing of oval bending explosionproof hole Show；Long Circle or oval bending explosion-proof covering board component set Long Circle burst disk mounting hole or oval bending burst disk to install Hole, on the installing space that can effectively utilize of cover plate, rationally using installing space, is extended with longitudinal rectilinear direction, is designed to Long Circle structure；Or when needing bigger explosion pressure release bore, extended with surrounding concentric track-wise, be designed to long corner bevelling Shape structure；This new Long Circle and oval bending structure, can make pressure release after explosion on original pure circle architecture basics Speed improves more than 3 times.

A kind of cylinder type lithium battery explosion-proof covering board, including cover plate, the cover plate are to be provided with just on cylindrical cover, cover plate Pole and negative terminal and corresponding positive and negative terminals tag fluid injection hole position, set on cover plate be additionally provided with mounting hole in addition Position, mounting hole site is provided with the explosion-proof bore pressure relief opening of increasing of correspondingly-shaped；Increase and correspondence shape is installed on explosion-proof bore pressure relief opening The burst disk of shape.

It is used as further program of the utility model：The expansion of the explosion-proof open area for increasing explosion-proof bore pressure relief opening is prolonged Mode is stretched, includes but is not limited to the longitudinal rectilinear direction of cover plate anchor ring and extends expansion to surround cover plate center of circle direction.

It is used as the utility model further scheme：The mounting hole site can be Long Circle, and corresponding increasing is explosion-proof Bore pressure relief opening and burst disk are Long Circle.

It is used as the utility model further scheme：The mounting hole site can be oval bending, and corresponding increasing is prevented Seam broken footpath pressure relief opening and burst disk are oval bending.

It is used as the utility model further scheme：The material of the Long Circle burst disk or oval bending burst disk is thick Degree 1025 uses thickening design (Thickness is 0.5mm-2mm).

It is used as the utility model further scheme：The Long Circle burst disk or oval bending burst disk are using continuous Laser edge welding procedure is welded.

The utility model is due to taking above technical scheme, with advantages below：

After 1. pressure relief opening circulation area becomes big after the explosion of Long Circle burst disk or oval bending burst disk, it is possible to achieve more Fast speed pressure release, further reduces risk of explosion, improves security performance.

After 2. pressure relief opening circulation area becomes big after the explosion of Long Circle burst disk or oval bending burst disk, in same explosion In the case of pressure, the residual thickness of explosion mouthful line of weakness can just do thickness, can thus reduce production difficulty, improve production Efficiency, while significantly more efficient the precision and stability of burst pressure can be ensured.

3. the material thickness of Long Circle burst disk or oval bending burst disk uses thickening design, (Thickness is 0.5mm- 2mm), in the installation position or installation position with cylinder type lithium battery explosion-proof covering board component, when making welding assembly, continuous side can be used Edge opposite joint laser welding process, so as base material thickness is thickening, fusion penetration can be deepened, and can be greatly reduced or even prevent weldering completely Bubble hole is produced when connecing, and causes battery drain problem.

4. after continuous laser edge welding procedure, for the penetration welding of conventional nearly line of weakness, because of height Warm posetionof weld changes the outer edge line for having arrived Long Circle burst disk or oval bending burst disk, becomes to explosion mouthful line of weakness distance Far, the heat at explosion mouthful line of weakness is transmitted to reduce, can effectively reduce because welding high temperature and caused by burst pressure performance become The harmful effect of difference.

5. using continuous laser edge welding procedure, while function is strengthened, production efficiency can also be made significantly to carry It is high.

Brief description of the drawings

Fig. 1 be the utility model description existing market in circular explosionproof hole covering plate structure diagram.

Fig. 2 is the large cylindrical lithium battery structure diagram of the utility model description.

Fig. 3 is the top view of the explosion-proof blind patch of Long Circle of the utility model description.

Fig. 4 is the side view of the explosion-proof blind patch of Long Circle of the utility model description.

Fig. 5 is the top view of the explosion-proof blind patch of oval bending of the utility model description.

Fig. 6 is the side view of the explosion-proof blind patch of oval bending of the utility model description

Fig. 7 is the top view of the Long Circle burst disk of the utility model description.

Fig. 8 is the side view of the Long Circle burst disk of the utility model description.

Fig. 9 is the top view of the oval bending burst disk of the utility model description.

Figure 10 is the side view of the oval bending burst disk of the utility model description.

Embodiment

The technical scheme of this patent is described in more detail with reference to embodiment.

Fig. 1-10 are referred to, a kind of cylinder type lithium battery explosion-proof covering board on cylinder type lithium battery cover plate, processes one Long Circle burst disk installation position 102, or oval bending burst disk installation position 104；The length of its Long Circle or oval bending, and The width definite value of formula circular arc closed at both ends, can be according to cylinder type lithium battery amount of capacity, the requirement to explosion final vacuum speed, circle Cylindrical battery cover plate installs utilization space to set, and the counterbore of burst disk installation position 102 or burst disk installation position 104 is deep Degree, can be matched according to the thickness of newly-designed Long Circle burst disk 1020 and oval bending burst disk 1040；Such as Fig. 3, such as scheme 4, respectively Long Circle and oval bending explosionproof hole covering plate structure design drawings；Long Circle or oval bending explosion-proof covering board component 101 Long Circle burst disk mounting hole 102, oval bending burst disk mounting hole 104 is empty in the installation that can effectively utilize of cover plate Between on, rationally using installing space, extended with longitudinal rectilinear direction, design long circle structure 102；Or need bigger quick-fried During broken pressure release bore, extended with surrounding concentric track-wise, be designed to oval bending structure 104；This new Long Circle and Oval bending structure, can make pressure release speed after explosion improve more than 3 times on original pure circle architecture basics；This practicality The cover plate of new described Long Circle or oval bending blast resistance construction, holds installed in the cylinder type lithium battery with explosion-proof demand On device, when air pressure or other type pressures inside container reach certain value, it is necessary to quickly the pressure of the inside is released Release, be otherwise possible to occur container inner pressure it is increasing or because after explosion pressure release bore it is not big enough, it is impossible to quickly let out The danger pressed and cause container to explode.So, by the explosionproof hole of this cylinder type lithium battery cover plate design long circle or The oval bending of person, reassembles the Long Circle burst disk or oval bending burst disk supporting with this shape, inside container When pressure reaches the pre-designed burst pressure force value of burst disk, burst disk will pop, and the pressure inside container just can be more Quickly discharge, more effectively avoid explosion danger.

The better embodiment to this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party , can also be on the premise of this patent objective not be departed from formula, the knowledge that one skilled in the relevant art possesses Make a variety of changes.

Claims

1. a kind of cylindrical battery explosion-proof covering board, including cover plate, it is characterised in that the cover plate is the lid for cylindrical battery Positive terminal or negative terminal and corresponding positive and negative terminals tag, fluid injection hole position are provided with plate, cover plate, in addition on cover plate also It is provided with burst disk mounting hole site, the pressure relief opening of increasing explosion bore of the mounting hole site provided with correspondingly-shaped；Increase explosion mouthful The burst disk of correspondingly-shaped is installed on the pressure relief opening in footpath；The expansion extension mode of the explosion-proof open area for increasing explosion pressure relief opening It is to extend expansion around cover plate center of circle direction with cover plate anchor ring rectilinear direction and with cover plate anchor ring；The mounting hole site is oval Shape or oval bending, the corresponding explosion-proof bore pressure relief opening of increasing and burst disk are Long Circle or oval bending；The Long Circle The material thickness of burst disk or oval bending burst disk is using design is thickeied, and Thickness is 0.2mm-3mm；The Long Circle is prevented Quick-fried or oval bending burst disk are welded using continuous laser edge butt welding technique.