SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a secondary battery capable of improving characteristic stabilization and yield by preventing looseness or deviation of a wound electrode group, and also to provide a method of manufacturing the same.SOLUTION: Disclosed is a secondary battery which includes: a wound electrode group which has a metal foil exposure part exposing a metal foil of an electrode at the end in a winding axis direction; a battery can in which the wound electrode group is housed; a battery lid which seals an opening of the battery can; a current collector plate which electrically connects an external terminal arranged in the battery lid and the metal foil exposure part of the wound electrode group. This secondary battery also includes: a first welding part in which the metal foils of the electrode laminated in the metal foil exposure part are joined to each other in a lamination direction; and a second welding part in which the metal foil exposure part and the current collector plate are joined.