Patent ID: 9722274
Date: 2017-08-01
CPC Classifications: H01M,Y02E,Y02P,Y10T

Claim:
1. A manufacturing method of a secondary battery comprising: a first sealing process that stores a power generation element inside an exterior body formed by overlapped exterior films and that seals the exterior body at a first sealing part, the power generation element being arranged with a space from at least a part of the first sealing part; a conditioning process that performs conditioning of the power generation element; a hole forming process that forms a degassing hole between the first sealing part and the power generation element; and a second sealing process that seals the degassing hole, wherein the hole forming process comprises a pressing process that presses, from both sides of the exterior body when the exterior body is in a substantially vertical position, a portion where the degassing hole is formed in the exterior body so that the overlapped exterior films are brought into contact with each other, before the degassing hole is formed in the exterior body.