| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power storage device capable of restraining a foreign substance from being mixed into a case when attaching/detaching a sealing member to/from an injection hole for an electrolyte.SOLUTION: A sealing member 21 comprises: an insertion portion 23 having a deformed portion 23b that is arranged inside a case and can be elastically deformed; and a shaft portion 25 arranged at an inner space 22 of the insertion portion 23, where a length L1 of an enlarged portion 25b disposed along a first direction D2 orthogonal to a shaft line direction D1 of the shaft portion 25 is longer than a length L2 of the enlarged portion 25b disposed along a second direction D3 which is orthogonal to the shaft line direction D1 and crosses the first direction D2. The length L1 of the enlarged portion 25b is longer than a distance L3 between inner surfaces in the inner space 22 of the deformed portion 23b along the third direction D4 orthogonal to the shaft line direction D1. The length L1 of the enlarged portion 25b is less than or equal to a distance L4 between inner surfaces in the inner space 22 of the deformed portion 23b disposed along a fourth direction D4 which is orthogonal to the shaft line direction D1 and crosses the third direction D4.</p> |
