| 摘要 |
PROBLEM TO BE SOLVED: To propose a structure in which, even when a reinforcement sheet is inserted on both sides of a wound electrode body, an electrolyte easily penetrates into the wound electrode body and a spatter (dust) generated by welding or the like can hardly enter the wound electrode body.SOLUTION: In a battery 100, conductive first sheets 61, 62 are respectively wound up in an inserted state at edges of a non-coating portion 11b of a positive electrode sheet 11 and a non-coating portion 13b of a negative electrode sheet 13 in the wound electrode body 120. At the non-coating part 11b of the positive electrode sheet 11 and the non-coating part 13b of the negative electrode sheet 13, porous second sheets 63, 64 are respectively wound up in the inserted state with a space closer to the inside in a width direction from the first sheets 61, 62. Between the first sheets 61, 62 and the second sheet 63, 64, liquid injection holes 72 are formed in the non-coating parts 11b, 13b, respectively. |
