Lithium secondary battery and fabrication method thereof

摘要

A lithium secondary battery which includes a battery unit having a positive electrode plate, a negative electrode plate and a separator interposed therebetween. A can accommodates the battery unit, and a reinforcing means is disposed above the can to increase a thickness of the can. A cap assembly is joined to an upper end of the can and the cap assembly has a cap cover and a safety means. The cap assembly is insulated from the can by a gasket.