Patent ID: 8546037
Filing Date: 2013-10-01
Classification: H01M,Y02E

Abstract:
1. A fuel cell separator comprising: a reactant gas supply manifold hole penetrating the separator in a thickness direction thereof; a reactant gas discharge manifold hole penetrating the separator in the thickness direction thereof; a groove-shaped first reactant gas channel provided on at least one main surface thereof such that the first reactant gas channel is bent, an upstream end of the first reactant gas channel is connected to the reactant gas supply manifold hole, and a downstream end of the first reactant gas channel is connected to the reactant gas discharge manifold hole; and one or more groove-shaped second reactant gas channels provided on the at least one main surface such that the second reactant gas channels are bent, at least upstream ends of the second reactant gas channels are connected to the reactant gas supply manifold hole, and the second reactant gas channels run along the first reactant gas channel, wherein the first reactant gas channel includes an upstream portion, a midstream portion and a downstream portion, and the upstream portion and the downstream portion surround the midstream portion, in a plan view of the separator, wherein the first reactant gas channel includes a first portion and a second portion located downstream of the first portion, the first portion is located closest to the downstream end in the upstream portion of the first reactant gas channel, in a plan view of the separator, and the second portion is located closest to the upstream end in the downstream portion of the first reactant gas channel, in a plan view of the separator, wherein the second reactant gas channel does not exist between the first portion and the downstream end, but exists between the upstream end and the second portion, and wherein at least one of a cross-sectional area of a first continuous portion (hereinafter referred to as a first specified portion) of the first reactant gas channel, the first continuous portion including at least the first portion, and a cross-sectional area of a second continuous portion (hereinafter referred to as a second specified portion) of the first reactant gas channel, the second continuous portion extending from at least the downstream end is smaller than a cross-sectional area of all portions of at least one second reactant gas channel (hereinafter referred to as a specified second reactant gas channel) of the one or more second reactant gas channels.