Patent ID: 9627710
Date: 2017-04-18
CPC Classifications: H01M,Y02E,Y02P,Y10T

Claim:
1. A battery comprising: a case and a cover plate that covers the case; an electricity-generating element that is formed by winding an electrode plate and a separator and has a space at a winding axial portion, the electricity-generating element being in the case; and a spacer having an inclined portion having a width that is gradually reduced toward the center of the electricity-generating element; wherein at least a part of the spacer is disposed in the space at the winding axial portion of the electricity-generating element, the inclined portion of the spacer abutting against an end of an inner wall of the electricity-generating element; the electricity-generating element has a flat surface on the inner wall of the winding axial portion; the inclined portion of the spacer has a flat surface; the flat surface of the inclined portion abuts against the flat surface on the inner wall of the winding axial portion; an end of the spacer has a width that is smaller than a width of other end of the spacer; and the end of the spacer is disposed in the space at the winding axial portion of the electricity-generating element and the other end of the spacer is in direct contact with the cover plate or an insulating plate that is in direct contact with the cover plate.