METHOD FOR MANUFACTURING A BATTERY

In an injecting step, a preset amount of an electrolytic solution is injected by multiple separate steps while first processing of injecting the electrolytic solution up to a position higher than a reference height set to be equal to or higher than an upper end of an electrode body at inside of the case in a state where the battery assembly is disposed with the injection port facing up, second processing of depressing the case by reducing a pressure in the case and maintaining a liquid surface level of the electrolytic solution injected in the first processing at a position equal to or higher than the reference height, and third processing of, after the pressure in the case is reduced to a preset pressure, releasing the inside of the case are repeated.