| 摘要 |
PROBLEM TO BE SOLVED: To increase a sealing property of a temporary sealing stopper for temporarily sealing a liquid injection hole in an aging step of a method for manufacturing a power storage device and prevent adhesion of an electrolytic solution to the liquid injection hole.SOLUTION: In a temporary sealing method, a cylindrical body 16 formed of an elastic material and having one end closed is disposed in a state of penetrating a liquid injection hole 13. This method includes inserting an elastic member 17 formed of a metal wire material 17a into the cylindrical body 16 so as to be deformed into a state in which the cylindrical body 16 expands outwardly in a state in which a mechanical pressure is applied from the inside, and so as to be deformed to the original diameter when receiving the pressure to the reduced diameter side in the expanded diameter state. A balloon member 18 is expanded with the balloon member 18 inserted in the elastic member 17. The cylindrical body 16 is pressed against the inner peripheral surface of the liquid injection hole 13, an upper end opening edge portion 13a of the liquid injection hole 13, and a lower end opening edge portion 13b of the liquid injection hole 13 via the elastic member 17.SELECTED DRAWING: Figure 3 |
