CN2133055Y

CN2133055Y - Anti-explosive device of battery

Info

Publication number: CN2133055Y
Application number: CN 92208693
Authority: CN
Inventors: 郭有源; 赵连智
Original assignee: No18 Inst Ministry Of Machine-Building And Electronics Industry
Current assignee: No18 Inst Ministry Of Machine-Building And Electronics Industry
Priority date: 1992-05-08
Filing date: 1992-05-08
Publication date: 1993-05-12
Anticipated expiration: 2002-05-08

Abstract

The utility model belongs to a venting plug or other mechanical devices which can be convenient for the external leakage of gas in a battery. The housing of the battery and especially the non-domestic high efficient battery is made into a closed shape by metal, under normal condition, the battery can not generate problems, but under the conditions of overdischarge of an external short circuit, high temperature, etc., explosion accidents are easily generated. The utility model designs an explosion-proof device, and namely, two kidney slots are pressed on the bottom of the battery housing, and an unenclosed circular or horseshoe-shaped slot whose cross section forms a V shape is engraved. The explosion-proof device which is designed according to the utility model can reduce pressure quickly and effectively, and the explosion accident of the battery can be reliably prevented.

Description

Anti-explosive device of battery

The utility model belongs to venting plug or other mechanical device of being convenient to gas leak in the battery.

A kind of non-civilian high-efficiency battery is lithium thionyl chloride cell particularly, and its shell is made closure with stainless steel.This battery uses the accident of generally can not blasting in normal condition.As the external short circuit of battery, overdischarge, high temperature situations such as (ambient temperature are above 90 ℃), the battery explosion accident takes place easily, its consequence is gently then damaged instrument and equipment, and is heavy then hurt sb.'s feelings.

Chinese patent CN-87200584 discloses a kind of anti-explosion battery that colliery or surrounding environment have fuel gas that is used for, the groove of this battery and lid are to be made by high-intensity composite material, and the heat-resisting elastic materials with voids that can play cooling arc extinguishing effect is arranged at battery internal upper part space filling, on battery cover, add an explosion-proof bolt again.The explosion-protection equipment of this kind battery, the structure more complicated, and be only applicable to battery.

The utility model is to overcome existing battery to produce the shortcoming of explosion accident as situations such as external short circuit, overdischarge, hot environments, design a kind ofly to scribe a part of weak link bottom battery case, plays the explosion-protection equipment of pressure release effect.

The utility model is mainly realized by following structure.At two kidney slots of existing battery case bottom compacting, scribe a circular or horseshoe-shaped V-type groove that does not seal again.

Above-mentioned said two kidney slots are symmetrically distributed, and its cross section is semicircle.Circular or the horseshoe-shaped V-type groove of scribing that does not seal is within two kidney slots surround and be in the opening of two kidney slots.This slot cross-section is triangle or V-arrangement.

The above-mentioned said circular or horseshoe-shaped V-type groove that does not seal, its diameter of a circle 5-15.5 millimeter, the angle 30-45 of its V-type groove, it scribes the remaining solid thickness in back is the 0.02-0.2 millimeter.

According to the explosion protection for batteries of the utility model design, it is rapid to open decompression or pressure release, effectively and has reliably prevented the blast of battery, from following test to find out:

1. external short circuit: ambient temperature 8-16 ℃ of short circuit current 60A, through 2.2-2.7 minute, explosion-protection equipment was opened decompression or pressure release.

2. overdischarge: ambient temperature 10-20 ℃ of discharging current 11A, 89.5-116 minute discharge time, explosion-protection equipment was opened decompression or pressure release.

3. high-temperature test: battery is heated to 90 to 160, has kept 50-60 minute, explosion-protection equipment is opened decompression.

Describe in detail below in conjunction with accompanying drawing.Fig. 1 is a structural representation of the present utility model, and Fig. 2 is explosion-proof opening structure schematic diagram, and Fig. 3 is the indent schematic cross-section, and Fig. 4 is the cutting schematic cross-section, and Fig. 5 is a cutting cross section signal partial enlarged drawing.(1) kidney slot in the accompanying drawings, (2) V-shaped groove, (3) battery case.

Battery particularly this envelope with the battery of shell, in use as to run into external short circuit, overdischarge, environment temperature too high Etc. situation, the inside battery heating is pressed in it and is increased, and when reaching certain numerical value, just produces blast. We are in one of the battery case bottom design weak link of ability 1.0-4.0MPa only accordingly, namely when inner pressure of battery during more than or equal to 1.0-4.0MPa weak link open decompression or pressure release. This weak link is a circle of not sealing or claims horseshoe-shaped V-type cutting. The forward position of this groove is positioned at the opening part of two kidney slots, purpose is when the battery container internal pressure increases, the disc that two kidney slots of battery case bottom surround raises up, stress occurring at the opening part of two kidney slots concentrates, and do not seal circular or claim the forward position of horseshoe-shaped V-type groove to be engraved on the opening part of two kidney slots, be conducive to the unlatching of weak link, realize decompression or pressure release effect. Do not seal circular or claim the degree of depth of horseshoe-shaped its diameter of a circle of V-type groove, cutting to be determined by following several respects factor. 1. inside battery authorized pressure, the 2. diameter of battery own, 3. battery case thickness. When inside battery authorized pressure≤1.0-4.0MPa or when claiming that cell internal pressure is no more than 1.0-4.0MPa, be used for 1,2,3,4, No. 5 and when the standard of Φ 30-50 * 55-125 millimeter and non-standard battery, the thick 0.3-1.0 millimeter of battery case, shape of a hoof groove diameter 5-15.5 millimeter, solid thickness remaining after the cutting is the 0.02-0.2 millimeter. The girth of the circle of not sealing or shape of a hoof groove accounts for the 70-90% of whole circumference. Be used for standard and the non-standard battery of 1,2, No. 5 and 40 * 95 millimeters, when battery case thickness is the 0.3-0.4 millimeter, the diameter of phi of cutting=8-14 millimeter, scribing rear remaining thickness is the 0.04-0.12 millimeter.

The circle that the utility model surrounds at two kidney slots of battery bottom design is round or geometric center is concentric with battery floor, its diameter of a circle for battery case at the bottom of circle or the 80-90% of end equivalent diameter, opening between two waists of kidney slot is the 1/6-1/7 that two waists surround round girth, and the cross section of groove is semicircle.

Cite an actual example below.When battery case thick 0.3 millimeter, be used for 1 ^#Battery, shape of a hoof cutting diameter of phi ₂=12.5 millimeters, the remaining thickness h=0.04-0.06 millimeter in back, cutting cross section angle 45 are scribed in cutting.The cutting girth accounts for 80% of overall circumference, kidney slot enclose diameter of a circle Φ ₁=22 millimeters, its opening accounts for 15% of all length overalls.

Claims

1, a kind of explosion-protection equipment of battery is characterized in that at two kidney slots of the bottom of battery case compacting, scribes a circle of not sealing again or its cross section of the shape of a hoof is the groove of V-arrangement.

2, explosion-protection equipment as claimed in claim 1 is characterized in that two kidney slots are symmetrically distributed, and its cross section is semicircle; Circular or the horseshoe-shaped V-type groove of scribing that does not seal is within two kidney slots surround and be in the opening of two kidney slots, and its cross section is triangle or V-type.

3, circular or horseshoe-shaped its diameter of a circle of the V-type groove 5-15.5 millimeter that does not seal that explosion-protection equipment as claimed in claim 1 or 2 is characterized in that scribing, its V-type groove angle 30-45, it scribes the remaining solid thickness in back is the 0.02-0.2 millimeter.