MANUFACTURING METHOD OF BATTERY

摘要

PROBLEM TO BE SOLVED: To solve the problem that a possibility is increased that a positive electrode and a negative electrode are short-circuited due to shifting and damage of a separator when the electrode plate group is pulled out of a winding core, because of thinness of the separator accompanying a recent further high-energy trend of a battery.

SOLUTION: This is a manufacturing method of a battery in which an electrode plate group in which a belt-shape positive electrode plate and a negative electrode plate are wound round in a swirl shape through a separator using a winding core 8 and electrolytic liquid are housed in a bottomed case and the aperture of this bottomed case is sealed by a sealing plate. When the electrode group is pulled out of the winding core 8, the winding core 8 and the separator portion 9 at the winding start of the electrode group pinched by the winding core 8 are cooled to ≤10°C.

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