Sealed storage battery and manufacturing method thereof

Details Sealed storage battery and manufacturing method thereof Sealed storage battery and manufacturing method thereof

1995-06-01

1996-12-24

Valentine, Donald R.

Metal working

Method of mechanical manufacture

Electrical device making

H01M 600

Patent

active

055869939

ABSTRACT:
A sealed storage battery has a sealing assembly including a hollow rivet mounted to a cover plate via a gasket and a lead piece connecting a positive collector to the hollow rivet. Mounting the hollow rivet to the cover plate is achieved by pressurizing a distal end portion of a hollow shaft of the hollow rivet with a punch having a conical tip end portion so as to caulk the distal end portion of the hollow rivet by enlarging the distal end portion diametrically outward. Tightness between the opposing surfaces of the members among the cover plate, hollow rivet, gasket and lead piece can be enhanced, providing excellent liquid leakage resistance in the battery. A valve body of a safety valve is housed in a positive terminal welded to the head of the hollow rivet.

REFERENCES:
patent: 4252873 (1981-02-01), Epstein et al.
patent: 5197995 (1993-03-01), Lowton et al.
Patent Abstracts of Japan, unexamined applications, E field, vol. 13, No. 232, May 29, 1989, The Patent Office Japanese Government, p. 34 E 765; & JP-A-01 038 965 (Matsushita Electric Ind. Co., Ltd.).
Patent Abstracts of Japan, unexamined applications, E field, vol. 15, No. 50, Feb. 6, 1991, The Patent Office Japanese Government, p. 130 E 1030; & JP-A-02 281 554 (Matsushita Electric Ind. Co., Ltd).

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