METHOD FOR MANUFACTURING SECONDARY CELL

摘要

Provided is a method for manufacturing a secondary cell by which a wound body can be effectively impregnated with an electrolytic solution. The method includes: a step of depressurizing an interior of an outer case 30; a step of pouring an electrolytic solution E into the depressurized outer case 30; a step of depressurizing the interior of the outer case 30; a step of pouring the electrolytic solution E into the depressurized outer case 30; a step of impregnating the wound body with the electrolytic solution E from both axial end portions 100a, 100b of a wound body 100; a step of waiting until a difference in pressure between a wound body external space S, which is a space between the outer case 30 and the wound body, and a wound body internal space S1 is reduced after the impregnation with the electrolytic solution E; and a step of pressurizing the wound body external space S.

主权项

1. A method for manufacturing a secondary cell, comprising:
a step of depressurizing an interior of a cell case; a step of pouring an electrolytic solution into the depressurized cell case; a step of impregnating a wound body with the electrolytic solution from both axial end portions of the wound body; a step of increasing the impregnated amount of the electrolytic solution in the both axial end portions of the wound body in order to reduce a difference in pressure between a wound body external space, which is a space between the cell case and the wound body, and a wound body internal space, which is an internal space of the wound body, after the impregnation with the electrolytic solution, and air-tightly sealing the wound body internal space, which is the internal space of the wound body, and the wound body external space, which is the space between the cell case and the wound body, with the impregnated electrolytic solution; and a step of pressurizing the wound body external space, which has been reduced in the difference in pressure.