CN2433734Y - Explosion-proof sealing device for coiling lithium manganese bioxide cell - Google Patents

Abstract

The utility model relates to an explosion-proof sealing device for a coiling lithium manganese bioxide cell. The utility model is composed of an acupuncture cover, a tablet, an explosion-proof film and a lower cover bowl and is characterized in that the periphery of a via hole at the middle of the bottom of the lower cover bowl is provided with a platform which upwards bulges; a surface where the explosion-proof film and the lower cover bowl are mutually contacted is provided with a concave stand which is matched with the bulged platform; the shape of the other surface of the explosion-proof film corresponds to the shape of the surface of the tablet which contacts explosion-proof film. The utility model can assure the sealing reliability of a battery so as to decrease the defective rate of the product and enhance the production efficiency.

Description

The explosive-proof sealed device of coiling lithium manganese dioxide battery

The utility model relates to battery, the explosive-proof sealed device of specifically a kind of coiling lithium manganese dioxide battery.

Lithium manganese dioxide cell be a kind of with lithium metal as anode active material, with γ+β type electrolytic manganese dioxide as cathode active material, with organic solvent (PC, DME etc.) and lithium perchlorate a kind of non-aqueous lithium battery as electrolyte.Coiled battery is meant that the inside of battery is coiled structure.This battery is since Japanese firm's the seventies is developed and put into production, and through nearly 30 years updating, technology is perfect day by day.At present the lithium battery of lot of domestic and international manufacturer production all is in addition improved on the technical foundation of Japan.There is sealing problem in actual applications in this technology.Its seal defect generally is created in the structure of Explosion-proof cap.In existing Explosion-proof cap structure (Fig. 1), mould composite membrane as the aluminium one of rupture pressure disc 2, be welded on the lower cover bowl 1 by adding pad mode.This structure is when the spot welding positive pole ear, and the heat of undue concentration can damage combining of rupture pressure disc and lower cover bowl, thereby causes leakage.

The purpose of this utility model is to propose the explosive-proof sealed device of a kind of coiling lithium manganese dioxide battery, in the hope of reaching the battery drain problem that solves, thereby reduces the fraction defective of product, enhances productivity.

At the foregoing invention purpose, the utility model adopts following technical scheme: the explosive-proof sealed device of a kind of coiling lithium manganese dioxide battery, form by acupuncture lid, compressing tablet, rupture pressure disc and lower cover bowl, its special character is the platform of oriented upper process around the intermediate throughholes of described lower cover bowl bottom, described rupture pressure disc has the concave station that matches with the upper process platform with the surface that the lower cover bowl bottom connection touches, and the shape of rupture pressure disc another side is corresponding with its compressing tablet surface configuration that contacts.

The utility model adds a raised platform upwards in the centre of lower cover bowl, rupture pressure disc and lower cover bowl combine formation two faying faces (A face and B face), have the dual-seal effect.When Explosion-proof cap and anode ear spot welding, even concentrate some that damage wherein, also have another face still can play sealing function, thereby guaranteed the reliability that seals like this, improved the qualification rate and the production efficiency of product because of heat.

Describe the utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is existing coiling lithium manganese dioxide battery Explosion-proof cap structure chart.

Fig. 2 is the utility model structure chart.

Fig. 3 is an Explosion-proof cap assembly schematic diagram among Fig. 2.

Fig. 4 is Fig. 3 decomposing schematic representation.

With reference to Fig. 2 and Fig. 3, the utility model is made up of acupuncture lid 4, compressing tablet 3, rupture pressure disc 2 and lower cover bowl 1.Platform 5 to upper process is wherein arranged around the lower cover bowl 1 bottom intermediate throughholes, a concave station 6 that matches with this platform 5 is arranged below the rupture pressure disc 2, they combine, two faying faces of formation A, B.On rupture pressure disc 2 with below concave station 6 corresponding positions a boss 7 is arranged or is flat surface, have below the compressing tablet 3 one with boss 7 or corresponding concave station 8 of flat surface or planes above the rupture pressure disc 2, they combine.Acupuncture lid 4 is contained in above the lower cover bowl 1 interior compressing tablet 3.

9 is sealing rings in Fig. 2, the 10th, and battery case.

In sum, the utility model is not only novel, and practical, and the design of its innovation can solve the battery drain problem really, compares with background technology to have outstanding feature and progress, has advance.

Claims (1)

1. The explosive-proof sealed device of a kind of coiling lithium manganese dioxide battery, form by acupuncture lid, compressing tablet, rupture pressure disc and lower cover bowl, it is characterized in that the described lower cover bowl bottom intermediate throughholes platform of oriented upper process on every side, described rupture pressure disc has the concave station that matches with above-mentioned raised platform with the surface that the lower cover bowl bottom connection touches, and the shape of rupture pressure disc another side is corresponding with its compressing tablet surface configuration that contacts.

Images