Patent ID: 6399242
Filing Date: 2002-06-04
Classification: H01M,Y02E,Y02P,Y02T

Abstract:
A lithium secondary battery, comprising:an internal electrode body, an organic electrolyte, a casing and first and second end caps, said internal electrode body comprising a positive electrode, a negative electrode, and a separator, said positive electrode and said negative electrode being wound via said separator so that said positive electrode and said negative electrode are not in contact with each other, whereby an outer structure comprising said end caps and said casing air-tightly encloses an entirety of a space defined within said outer structure, said internal electrode body and said electrolyte being within said space, said casing having at least two necking portions, said two necking portions being on opposite axial sides of said internal electrode body, each of said necking portions comprising a region of smaller circumference than circumferences of portions of said casing adjacent to said necking portion, a body of said casing being solely made of a single pipe.