| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device which makes it possible to reduce the electric resistance of a welding section which is a junction between a laminate and a conductive member in an active material non-coated portion of a plurality of electrodes, which permits the welding section to be welded without consuming much power, and which is capable of large current charge and discharge.SOLUTION: The power storage device includes an electrode assembly 12 composed of a cathode 16 and an anode 17 having an active material layer on both sides of metal foil which are laminated one on top of another via a separator 18. In the cathode and the anode, active material non-coated portions 16b and 17b having some width along one side of the metal foil are formed, and at least the outermost active material non-coated portion of laminates 20p and 20n composed in layer form of the active material non-coated portions is welded to conductive members (a cathode conductive member 21 and an anode conductive member 23) by welding sections 22 and 24. The laminate is divided into two or more portions by a slit 19, and the laminates and the conductive members are welded by two welding sections, each welding section being disposed separately for divided laminates, respectively. |
