Patent ID: 8865366
Filing Date: 2014-10-21
Classification: H01M,Y02E

Abstract:
1. An internal manifold type fuel cell formed by stacking an electrolyte electrode assembly and separators in a stacking direction, said electrolyte electrode assembly including a pair of electrodes and an electrolyte membrane interposed between said electrodes, reactant gas flow fields for supplying reactant gases along surfaces of said electrodes being formed between said electrolyte electrode assembly and said separators, reactant gas passages being connected to said reactant gas flow fields and extending through said fuel cell in the stacking direction, the fuel cell comprising: a connection channel connecting said first reactant gas passage and said first reactant gas flow field is provided on said separator; a first reactant gas diffusion layer provided in said electrolyte electrode assembly; and a second reactant gas diffusion layer provided in said electrolyte electrode assembly, wherein: said separator is a metal plate, said connection channel is formed by press forming of said metal plate to corrugate said metal plate to create ridges, wherein the metal plate has ridges and grooves on two major surfaces at the connection channel, and the ridges of the connection channel abut against a surface of the first reactant gas diffusion layer on a side opposite to the electrolyte membrane, a surface area of the first reactant gas diffusion layer is larger than a surface area of the second reactant gas diffusion layer, and the first reactant gas diffusion layer of said electrolyte electrode assembly has an overlapping portion extending on said connection channel such that said overlapping portion is tightly attached on said separator for covering said connection channel.