Gs Yuasa International Ltd.

Shinichi Egami

Eiji Hojo

Yasuhide Nakayama

Masashi Shiota

Shin Ohsaki

Hirofumi Umetani

There is provided a storage battery, including: a container having at least one cell chamber; a lid body () made of synthetic resin for covering a top opening of the container, the lid body having on a top surface a recessed portion that is recessed downward, the lid body having positive and negative electrode terminals disposed close to one side of the lid body and respectively at both end portions of said one side in a longitudinal direction, wherein the positive and negative electrode terminals () respectively have lower portions embedded in the lid body and upper portions projecting from the lid body; and an auxiliary lid () for closing the recessed portion. Conventional production of the storage battery has problems, for example, in that: when embedding a portion of a terminal to a lid body by insert molding, difference in shrinkage is caused between a surface in which a terminal body is embedded and a surface on which the terminal body is exposed, which results in difficulty in fitting the lid body to the container. The present invention is intended to solve this problem, for example, by providing the lid body of the storage battery with projections (T,T), each at a location at which the upper portion of each of the terminals projects, at a location proximate to the location at which the upper portion of each of the terminalsprojects, or at each of these locations.

Storage battery

A lead-acid battery comprising a container having at least one cell chamber and a lid body for covering a top opening of the container. The lid body has on a top surface a recessed portion having therein an annular portion protruding upward and having, in an area of a bottom wall inside the protruding portion, an exhaust hole for exhausting gas from the cell chamber, wherein a guide passage for guiding gas from the exhaust hole to the outside is formed by joining the protruding portion with a joining portion provided on the lid body cover. An annular groove formed between the protruding portion and the vertical wall is covered with an outer periphery of the lid body coverand the guide passage is isolated from the groove.

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Kyoto, Japan

Shinichi Egami