LITHIUM SECONDARY BATTERY

摘要

A lithium secondary battery includes a battery case, and an internal electrode b ody contained in the battery case and including a positive electrode and a negative electrode wound through a separator film made of porous polymer, and uses a nonaqueous organic electrolyte. Opposing pressure release mechanisms are disposed at both ends of the battery case in the winding direction of the positi ve electrode and the negative electrode. The lithium secondary battery is simple in fabrication, has small internal resistance, and is superior in safety.