CN209119201U - A kind of secondary safety relief valve of anti-explosion battery - Google Patents

Abstract

The utility model discloses a kind of secondary safety relief valves of anti-explosion battery, it is made of a plurality of identical stria radially diverged on explosion-proof battery casing outer bottom from bottom centre and equally distributed, wherein, the depth dimensions of the stria on explosion-proof battery casing outer bottom become smaller from explosion-proof battery casing outer bottom center radially away from center with stria.It to guarantee accurate, safety relief, is required according to vent pressure, the stria depth capacity size on the explosion-proof battery casing outer bottom is arranged at explosion-proof battery casing outer bottom center and between 19/20 to the 3/4 of battery housing base thickness.By the above-mentioned means, reduction can be effectively directed and discharge the gas that battery generates, prevent gas from not having to explode caused by excretion in time, and the quality of product can be improved.

Description

A kind of secondary safety relief valve of anti-explosion battery

Technical field

The utility model relates to battery technology fields, more particularly, to a kind of secondary safety relief valve of anti-explosion battery.

Background technique

Battery is widely used in various daily and industrial equipment as a kind of common articles.At present as lithium battery Core has two kinds of packing forms of Soft Roll and metal-back (stainless steel case, steel shell, aluminum hull etc.), and soft pack cell inner heat, which produces gas, to be caused Battery core swelling of case makes product casing deformation reduce certain pressure, so the probability of explosion is generally lower.But metal-back encapsulates Battery core, the pressure inside battery core can not be reduced by battery core casing deformation, so when battery core exception, battery core internal gas Pressure can be increasing, finally explodes.So for metal-back battery core, when internal gas pressure reaches a certain level When, it is necessary to it takes effective way to allow battery core pressure release, achievees the purpose that safe.In the prior art, it is usually provided on the head of anode Leakage port or device explosion-proof combined block, but it is this when package quality is poor, and leakage port can cause battery quick-fried in the presence of losing heart not in time It is fried.Also have by way of in bottom indentation and manufacture secondary relief valve, but since indentation design is random strong, do not press According to the requirement of safety anti-explosive pressure, pressure relief opening position, vent pressure release are unable to control.Battery product yields is caused to drop It is low.

Utility model content

The technical issues of the utility model solves is: providing a kind of secondary safety relief valve of anti-explosion battery, is able to solve Explosion existing in the prior art that cause not in time of losing heart, thus the safety used in raising battery；Electricity is improved simultaneously Pond product quality.

For above-mentioned purpose, the utility model uses following technical scheme:

A kind of secondary safety relief valve of anti-explosion battery is provided, by explosion-proof battery casing outer bottom from bottom centre radially Diverging and equally distributed a plurality of identical stria is constituted, the depthometer of the stria on the explosion-proof battery casing outer bottom It is very little to become smaller from explosion-proof battery casing outer bottom center radially away from center with stria.To guarantee accurate, safety relief, according to letting out Pressure pressure requires, and the stria depth capacity size on the explosion-proof battery casing outer bottom is arranged in explosion-proof battery casing outer bottom At portion center and for battery housing base thickness 19/20 to 1/2 between.

The utility model has the beneficial effects that: being different from the prior art, a kind of anti-explosion battery provided by the utility model Secondary safety relief valve, by a plurality of phase radially diverged on explosion-proof battery casing outer bottom from bottom centre and equally distributed With stria constitute, the depth dimensions of the stria on the explosion-proof battery casing outer bottom are as stria is from explosion-proof battery casing Outer bottom center becomes smaller radially away from center.To guarantee accurate, safety relief, required according to vent pressure, described is explosion-proof Stria depth capacity size on battery housing base is arranged at explosion-proof battery casing outer bottom center and is battery case bottom Between 19/20 to the 1/2 of portion's thickness.By the above-mentioned means, the utility model can be effectively directed reduction and release battery generates Gas, prevent gas from not having to explode caused by excretion in time, and the quality of product can be improved.

Detailed description of the invention

The utility model is described in further detail below according to drawings and examples.

Fig. 1 is anti-explosion battery three stria combination diagrams of secondary safety relief valve described in the utility model embodiment.Fig. 2 For the secondary safety relief valve structural base view schematic diagram of anti-explosion battery described in the utility model embodiment.Fig. 3 is A-A in Fig. 2 Locate cross-sectional view.Fig. 4 is the partial enlarged view in Fig. 3 at B, and Fig. 5 is the secondary safety of anti-explosion battery described in the utility model embodiment Two stria combination diagrams of relief valve；Fig. 6 is the secondary safety relief valve of anti-explosion battery four described in the utility model embodiment Stria combination diagram.In figure: 1, explosion-proof battery casing bottom；2, stria；Size H is battery housing base thickness；Size h1 For the depth capacity of stria；Size h2 is the minimum-depth of stria.

Specific embodiment

For technology contents, the objects and the effects that the utility model is described in detail, below in conjunction with embodiment and match Attached drawing is closed to be explained.

It is being radially diverged on explosion-proof battery casing bottom 1 from bottom centre and equally distributed more referring to figs. 1 to Fig. 4 The identical stria 2 of item is constituted, wherein the depth dimensions h1, h2 of the stria 2 on explosion-proof battery casing outer bottom 1 with stria from Explosion-proof battery casing outer bottom center becomes smaller radially away from center.To guarantee accurate, safety relief, wanted according to vent pressure It asks, the stria depth capacity size h1 on the explosion-proof battery casing outer bottom is arranged at explosion-proof battery casing outer bottom center Place and for battery housing base thickness H 19/20 to 1/2 between.

Particularly, it can according to need, stria depth capacity size h1 be set equal to stria minimum-depth size h2.

When battery occurs overcharging in use, over-discharge, curent change are excessive, when high temperature and to generate gas excessive When, it can be broken by stria 2 and generate discouraged, be released the gas in battery core in time, reduce the internal pressure of battery, prevent Battery sets off an explosion, and achievees the purpose that improve the security performance that battery uses.

The combination of stria on explosion-proof battery casing bottom is arbitrary, and attached drawing, which only lists several combinations and is used as, to be shown Meaning, Fig. 1 is three stria combination diagrams；Fig. 5 is two stria combination diagrams；Fig. 6 is four stria combination diagrams；

The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all Equivalents made based on the specification and figures of the utility model are applied directly or indirectly in relevant technology neck Domain is also included in the patent protection scope of the utility model.

Claims (3)

1. a kind of secondary safety relief valve of anti-explosion battery, by what is radially diverged on explosion-proof battery casing outer bottom by bottom centre And equally distributed a plurality of identical stria is constituted, which is characterized in that the depthometer of the stria on explosion-proof battery casing outer bottom It is very little to become smaller from explosion-proof battery casing outer bottom center radially away from center with stria.

2. the secondary safety relief valve of a kind of anti-explosion battery according to claim 1, which is characterized in that the anti-explosion battery Stria depth capacity size on shell outer bottom is arranged at explosion-proof battery casing outer bottom center and is battery housing base Between 19/20 to the 1/2 of thickness.

3. the secondary safety relief valve of a kind of anti-explosion battery according to claim 1, which is characterized in that the anti-explosion battery Stria depth capacity size on shell outer bottom can be equal with minimum dimension.