| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device capable of easily forming an electrode assembly, and improving current collection efficiency.SOLUTION: The power storage device includes an electrode assembly 12 having a band-shaped negative electrode sheet 20 constituted such that negative electrode plane parts 22 and negative electrode folded parts 23 extending from negative electrode boundary parts E1 as the marginal parts of the negative electrode plane parts 22 are alternately disposed so as to be folded in zigzag and a band-shaped first separator 40 having a fixing surface 40a constituted such that separator plane parts 43 interposed with a positive electrode sheet 30 fixed to the fixing surface 40a between the negative electrode plane parts 22 and separator folded parts 44 extending from separator boundary parts E2 orthogonal to the negative electrode boundary parts E1 on the separator plane parts 43 are alternately disposed so as to be folded in zigzag. Positive electrode current collector tabs 34 electrically connected to positive electrode terminals are protruded at marginal parts 30a disposed at the side of the separator folded parts 44 which become a hill form folding state with respect to the fixing surface 40a among the marginal parts of the positive electrode sheet 30. |
