| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device in which a blow hole can be prevented from being formed in a weld zone by using a liquid injection hole that can be made simply, and a sealing member can be welded accurately to a determined position.SOLUTION: A secondary battery 10 includes a liquid injection hole 18 in a lid 14. The liquid injection hole 18 includes a fitting hole 19 having a constant diameter located close to the outer surface 14b of the lid 14 and into which a sealing member 30 is fitted, an interconnection hole 21 having a reduced diameter compared with the fitting hole 19 and continuous thereto nearer to the inner surface 14a of the lid 14 than the fitting hole 19, and a through hole 22 continuous to the interconnection hole 21 nearer to the inner surface 14a of the lid 14 than the interconnection hole 21. The lid 14 includes an inclined plane 20 connecting the peripheral edge 19a of the fitting hole 19 and the peripheral edge 22a of the through hole 22, and the interconnection hole 21 is surrounded by the inclined plane 20. The inclined plane 20 is inclining to recede from the inner surface 30a of the sealing member 30 toward the through hole 22 from a weld zone 31. |
