Patent ID: 7586288

Claim:
A manufacturing method of a secondary battery provided with a power generating element and a battery case accommodating the power generating element, comprising the steps of: arranging the secondary battery to a restraining jig, said restraining jig comprising at least a pair of side plates adjacent respective sides of the secondary battery, and a removable connecting rod, configured to be tightened to compress the side plates against the respective sides of the secondary battery, thereby restricting an expansion of the battery case with respect to at least a part of the battery case, and that is configured to be removable from a processing device that performs at least one of a charging process and a discharging process on the secondary battery with the secondary battery arranged to the restraining jig regardless of a magnitude of an internal pressure in the secondary battery, and performing at least one of the charging process and the discharging process on the secondary battery with the restraining jig mounted to the processing device; and removing the restraining jig from the processing device with the secondary battery arranged thereto after the completion of said process.