Enclosed alkaline storage battery

Abstract

Abstract PURPOSE:To lengthen lifetime, by providing a multilayer separator in which non-woven fabric of polypropylene fibers of the prescribed diameter is integrated with second non-woven fabric of polypropylene fibers oridented in a prescribed direction. CONSTITUTION:An anode plate, a cathode plate and a band-like separator located between both plates are vortically wound. A group of such assembly is used to manufacture an enclosed alkaline storage battery. The separator is a multilayer one 2 in which second non-woven fabric 1' is tightly fixed on first non- woven fabric 1. the first non-woven fabric 1 is made of polypropylene fibers A whose thikness is 1.0-1.5 deniers and which are irregularly oriented. The second non- woven fabric 1' is made of polyethylene fibers B whose thickness is the same as that of non-moven fabric 1 and whose length is 1-10 times larger than that of the polypropylene fibers A and which are oriented in a prescribed direction. The second non-woven fabric 1' is tighly fixed on the first non-woven fabric 1 so that the fibers of the second fabric 1' extend in parallel with the direction of the winding of the electrode plates.

Inventors

• 👤 Seiichi Okamoto
• 👤 Sadakichi Yamamoto
• 👤 Junji Kuraki

Bibliographic Details