Patent ID: 8211561

Claim:
A winding type battery comprising: a center pin having a shape that extends along an axial line; and a wound power generation element in which a strip-shaped positive electrode plate and a strip-shaped negative electrode plate are wound in an overlapping state so that a strip-shaped first separator longer than the positive electrode plate and the negative electrode plate is interposed in one interspace between the positive electrode plate and the negative electrode plate and a strip-shaped second separator longer than the positive electrode plate and the negative electrode plate is interposed in another interspace between the positive electrode plate and the negative electrode plate, at least one of the first separator and the second separator being fixed to the center pin and wound from a start end side around the center pin in one direction, wherein when a circumferential direction around the axial line, in which winding of the wound power generation element advances, is referred to as a forward winding direction, at least one of the first separator and the second separator has a clamped portion clamped by the center pin, the center pin includes an inside clamp portion; and a plate-like outside clamp portion located radially outside of the inside clamp portion relative to the axial line; the clamped portion is clamped between an outer peripheral surface of the inside clamp portion and an inner peripheral surface of the outside clamp portion while the clamped portion is extended in the forward winding direction along the inner peripheral surface of the outside clamp portion, and one of the first separator and the second separator is extended along in contact with the outer peripheral surface of the outside clamp portion.