SHEATH-CAN FOR SEALING ANGULAR LITHIUM SECONDARY BATTERY MADE OF ALUMINUM ALLOY

摘要

PROBLEM TO BE SOLVED: To make a sheath-can of a sealing angular lithium secondary battery have high strength and excellent formability and prevent defamation such as buldge by using a light Al alloy material for the sheath-can. SOLUTION: In a sheath-can of a sealing angular battery storing a non- circular spiral electrode, thickness of the linear part of a major axis part is the same that of the linear part of a minor axis part, the sheath-can is made to contain Mg 0.2 to 2.0 wt.%, Zn 0.8 to 5.0 wt.%, Cu 0.02 to 0.5 wt.% and the remaining part is formed by an Al alloy material made of Al and inevitable impurities.