US 5,665,483 A · Sealed storage battery

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.

Claims11

Dependent claims

A sealed storage battery comprising:

a sealing assembly having a hollow rivet fitted and fixed via an insulating gasket to an annular cover plate which seals an opening of a container;
and
a safety valve received in an electrode cap fixed to a head of the hollow rivet such that the safety valve communicates with an interior of the battery via an axial bore formed in a hollow shaft of the hollow rivet,
said hollow shaft being caulked and having an uncurled distal end portion, said distal end portion being diametrically enlarged relative to both a proximal end portion of the hollow shaft and an intermediate portion of the hollow shaft, whereby said hollow rivet is fixed to said cover plate.

1 more element

Dependencies are inferred from the claim text.

Sealed storage battery

Life of this patent

Sealed storage battery

Life of this patent

Abstract

Claims11