| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure and method for lightening a stress of a pileup part formed by a current collector uncoated part, and a connection part of a lead frame plate in a power storage device including a winding-type electrode body, and current collectors connected to the electrode body.SOLUTION: A power storage device comprises: an electrode body 120 formed by winding electrodes; and current collectors connected to the electrode body. The electrode body has, at one end in a winding axis direction, a pileup part 126 arranged by pileup of an uncoated part 123a composed of a part of the electrode coated with no active material. The pileup part has: a notched part 127 provided on at least one side of opposing sides of a connection part 129 making a part connected to the corresponding current collector in a circumferential direction of the electrode body, and arranged by pileup of a part having a notch 127a formed in more than one uncoated part along a winding axis direction; and an un-notched part 128 located on an outer peripheral side of the notched part, and arranged by pileup of a part having no notch in the more than one uncoated part.SELECTED DRAWING: Figure 4 |
