LITHIUM SECONDARY BATTERY

摘要

PURPOSE: A lithium secondary battery precisely is provided to prevent electrolyte and inner gas from leakage in advance. CONSTITUTION: An electrode group(22) is inserted in a can(20) which shape looks like a cube. A cap assembly(24) including a positive terminal(24a) is placed on an opening(20a) of a can(20). An electrolyte is injected to a can. A cap assembly(24) includes a safety part(24b) on inside. An electrolyte inlet(24d) is formed on a part of a top cap(24c) with certain size. An electrolyte inlet(24d) is welded by a laser to seal the can tightly. A sealing material(26) is inserted around an electrolyte inlet(24d) and a laser is radiated to edge of the sealing material.