Patent ID: 7175936

Claim:
A lithium secondary battery comprising: an inner electrode body provided with a positive electrode plate and a negative electrode plate respectively made up of at least one metal foil wound or laminated, said inner electrode body being impregnated with a non-aqueous electrolyte; current collector members for leading current out of said inner electrode body; a battery case for housing said inner electrode body, said battery case having opposed open ends; two caps for sealing said inner electrode body at both open ends of said battery case, each of said caps being provided with an internal terminal formed thereon, one of said two caps being electrically connected to said internal terminal formed thereon and being electrically connected to said battery case; positive and negative external terminals formed on another one of said two caps, one of said external terminals being electrically connected to said another one of said two caps; and a depressurization hole formed on said one of said two electrode caps.