| 摘要 |
PROBLEM TO BE SOLVED: To provide a winding-type secondary cell which can raise electrostatic capacity per unit volume, without a possibility that positive and negative lead parts come into contact with each other. SOLUTION: A polarizable electrode, wherein an active material 16 is applied to a strip-like current collector 14 is laminated through a separator 26. Lead taking-out parts 22, 24, wherein the current collector 14 extends, are formed in one end side of a longitudinal direction of the current collector 14 and are arranged opposite each other in a longitudinal direction of the current collector 14, when the are laminated. The laminated polarizable electrode and the separator 26 are wound around a metallic rod 28 and stored inside a metallic case 20. Since the lead taking-out parts 22, 24 are arranged in a central part and an outer circumferential part of the metallic case 20 and a volume occupied thereby can be reduced. electrostatic capacity can be further ensured by corresponding, amount. |
