Patent ID: 10476097

Abstract:
The present invention has an object to provide a secondary battery manufacturing method and apparatus capable of impregnating a sufficient amount of electrolyte in an electrode laminated body with simplified work effort while reducing working time and a manufacturing cost. The method of manufacturing a secondary battery according to the present invention comprises the steps of: inserting, into an outer container, an electrode laminated body in which a positive electrode and a negative electrode are laminated with a separator interposed therebetween; sealing an outer peripheral portion of the outer container except for a part thereof before or after the electrode laminated body is inserted; and injecting electrolyte (5) into the outer container having the electrode laminated body inserted therein, from non-sealed part as an injection port (6a). In the step of injecting the electrolyte (5), injection of the electrolyte (5) is started in an atmospheric pressure environment, and then the injection of the electrolyte (5) and pressure reduction of an environmental pressure are performed.