Importance

Loading Importance Indicators...

Abstract

Disclosed is a novel non-aqueous battery comprising a spirally wound electrode assembly comprising a cathode, an anode and a separator which are spirally wound so that the cathode and anode active material layers are arranged opposite to each other through the separator, wherein the battery has a cathode-equipotential metallic segment provided in association with the cathode, wherein the segment has on at least one side thereof a portion free of a cathode active material layer to provide a cathode-equipotential, exposed metallic portion (.alpha.) longitudinally extending over a length of one wind or more of the spirally wound structure, the portion (.alpha.) being positioned opposite to an anode-equipotential, exposed metallic portion (.beta.) which is provided, in association with the anode, over a length of one wind or more of the spirally wound structure. Also disclosed is a non-aqueous battery comprising a stacked or zigzag-folded laminate electrode assembly accommodated in a casing, each having substantially the same structure as that of the spirally wound electrode assembly. By virtue of the unique construction, an accident in which the battery is crushed by an external pressure, overcharged by a malfunctioning of a charging circuit, pentrated with an iron nail etc., or heated by external high temperature heat source, a low resistance short-circuiting safely occurs between metallic segments without suffering a large temperature elevation.

Loading the Abstract Image...

First Claim