CN201181716Y - Lithium battery outer casing with explosion-proof apparatus - Google Patents

Abstract

A lithium battery shell with a gasproof apparatus is characterized in that one or a plurality of notch grooves (2) are curved on the surfaces (3) of the walls surrounding the battery shell (1); the notch grooves are uniformly arranged along the transverse or vertical directions and the depths of the notch grooves are 15 to 80 percent of the thickness of the wall of the shell; the width is between 0.05 and 2mm. The positions of the notch grooves 2 in a weak procedure is on the side wall of the battery which does not affect the appearance effect of the battery; designing the battery in this way can not generate displacement with a large range due to the pressure releasing, thereby reducing the harm possibly generated by the battery to the lowest; under the situation that an accident happens to the battery, the pressure can be fast and reliably released and drained for achieving the design requirements.

Description

The li battery shell of band explosion-protection equipment

Technical field

The utility model relates to the lithium battery security fields.

Background technology

All the time, the safety problem of lithium battery is the problem that battery circle is concerned about and is paid attention to.Particularly in recent years, a lot of lithium battery explosion accidents took place all over the world, the loss that is caused is all very big, even the situation of casualties occurs.Lithium battery is because of safety problem even be listed in the air transport prohibited material.In the UL safety test, stipulate, battery does not allow to occur blast under several improper user modes, for lithium battery, battery does not allow to occur on fire from explosion under conditions such as weightlessness, extruding, short circuit, restricted charging, knocking, and battery leakage is an acceptable.For this reason, field of batteries is to go to carry out according to the requirement of UL in battery design with in producing substantially, and is more then be under the situation of the every electrical performance indexes that improves battery energetically, and the security performance of battery is put in the first place.

Lithium battery blast generally is unusual short circuit to occur and cause internal temperature of battery to rise because improper use or inside battery may appear in battery, cell internal pressure increases, and battery case holds be can't stand cell internal pressure and destructive non-directional splitting of moment occur.Consider that battery may occur under the unexpected situation in the Generally Recognized as safe design, in battery case bottom or upper design weak link, when inner pressure of battery reached certain value, battery can automatic directive property slightly splits, and it is on fire from explosion that this has been avoided effectively that battery may occur.But this weak link design technology has unreliability, and when cell internal pressure sharply increased, often causing directive property to be split can't take place, and still keeps away the generation of unavoidable lithium battery explosion accident.

Summary of the invention

The utility model is improvements over the prior art design, purpose provide a kind ofly can reliably more rapidly discharge, the li battery shell of the band explosion-protection equipment of drainage pressure, to improve the safety anti-explosive performance of lithium battery.

The technical solution of the utility model is: when the weak link of design li battery shell is not to consider bottom and upper press moulding, but carries out cutting on the sidewall of battery case.Concrete scheme is to be carved with cutting 2 on the sidewall wall 3 around the battery container 1; Cutting 2 is 1 or many, laterally or vertically evenly arranges, and the degree of depth is 15%～80% of a housing wall thickness, and width is 0.05～2mm.

Advantage of the present utility model and beneficial effect are:

1. the position of the weak link cutting 2 of the utility model patent indication does not influence the appearance of battery on the sidewall of battery;

2. under the battery something unexpected happened, battery can be because of pressure releasing produce large range displacement, thereby drops to the issuable harm of battery minimum;

3. can reliably discharge rapidly and drainage pressure, reach safety requirements.

Description of drawings

Fig. 1 is the utility model master TV structure schematic diagram,

Fig. 2 is the left view of Fig. 1.

Embodiment

Show in the utility model master TV structure schematic diagram at Fig. 1, in battery container 1 punching out process, directly engraving 1 or many cuttings 2 that the degree of depth is a housing wall thickness 15%～80% equably on the sidewall wall 3 around the battery container 1 with particular manufacturing craft, the width of cutting 2 is 0.05～2mm, afterwards, again battery container 1 is carried out electroplating processes.The degree of depth of She Ji cutting can make battery container when bearing 20～60Kg pressure like this, and housing can effectively and promptly discharge, drain cell internal pressure from the position season crack of cutting 3, improves the safety anti-explosive performance of lithium battery.Cutting 2 has 1 or many among Fig. 2.Cutting 2 horizontal, vertical arranging on the sidewall wall all can.

Claims (2)

1。A kind of li battery shell with explosion-protection equipment is characterized in that: be carved with cutting (2) on the sidewall wall (3) all around at described battery container (1).

2. the li battery shell of band explosion-protection equipment as claimed in claim 1 is characterized in that: described cutting (2) is 1 or many, laterally or vertically evenly arranges, and the degree of depth is 15%～80% of a housing wall thickness, and width is 0.05～2mm.

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