Patent ID: 7718292
Filing Date: 2010-05-18
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A manufacturing method for a fuel cell stack, wherein the fuel cell stack includes plural cells respectively comprising: a membrane electrolyte assembly having a polymer electrolyte membrane and two electrodes, the two electrodes, which are constituted by a catalyst electrode layer and a porous gas diffusion layer, supporting the polymer electrolyte membrane from both sides; and a separator including a gas passage which supplies fuel gas or oxidizer gas to the gas diffusion layer, said manufacturing method comprising the steps of: repeating a cycle of applying and removing a load on the gas diffusion layer during manufacture of the gas diffusion layer, while comparing the thickness (T forming the membrane electrolyte assembly from the gas diffusion layer after the repeating step; and laminating the cells each having the membrane electrolyte assembly, and then fastening the laminated cells.