Patent ID: 9576748
Date: 2017-02-21
CPC Classifications: H01G,H01M,Y02E,Y02P

Claim:
1. An electricity storage device that includes an electricity storage element formed by winding an electrode body of an anode or cathode side along with a separator, wherein an electrode leading section having an inclined edge is formed on an element end-face of the electricity storage element by a part of the electrode body; wherein the electricity storage element alternately includes a removal section and the electrode leading section on an edge of the electrode body before or in the middle of winding, the removal section includes a cut section in a longitudinal direction and a cut section in a crossing direction, the cut section in the longitudinal direction being cut in the longitudinal direction of the electrode body, and the cut section in the crossing direction being cut in the crossing direction of the electrode body, and the cut section in the longitudinal direction is extended toward the electrode leading section beyond the cut section in the crossing direction, or the cut section in the crossing direction is extended beyond the cut section in the longitudinal direction.