Patent ID: 10396342

Abstract:
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.