Patent ID: 8815464
Filing Date: 2014-08-26
Classification: H01M,Y02E

Abstract:
1. A fuel cell comprising: a membrane electrode assembly having an electrolyte membrane and a pair of electrodes disposed on both sides of the electrolyte membrane; a metal separator stacked with the membrane electrode assembly, a reactant gas passage being provided between the membrane electrode assembly and the metal separator to supply a reactant gas along an electrode surface, the metal separator including a reactant gas communication hole to communicate with the reactant gas passage, the reactant gas communication hole having a through hole in the stacking direction, the metal separator further including a connecting passage that connects the reactant gas communication hole to the reactant gas passage, the metal separator further including a plurality of groove groups in the connecting passage adjacent to the reactant gas communication hole, the plurality of groove groups each having a plurality of grooves press-formed to provide flow channels that allow the reactant gas communication hole to communicate with the reactant gas passage in a parallel flow arrangement via the flow channels, the grooves adjacent to each other being spaced apart by a first distance, the groove groups adjacent to each other being spaced apart by a second distance larger than the first distance; and a receiving member disposed on a first surface of the metal separator, the first surface being disposed on an opposite side of a second surface of the metal separator, the groove groups being provided on the second surface, the receiving member being located between the groove groups adjacent to each other when viewed in the stacking direction.