| CPC H01M 8/04268 (2013.01) [H01M 8/0284 (2013.01); H01M 8/04014 (2013.01); H01M 2250/20 (2013.01)] | 17 Claims |
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1. A fuel cell system, comprising:
a fuel cell stack including a cell stack body including a plurality of power generation cells stacked together, the power generation cells each containing a membrane electrode assembly member configured to generate electrical power due to an electrochemical reaction between an oxygen containing gas and a fuel gas, and two separator members arranged on both sides of the membrane electrode assembly member;
a stack case in which the fuel cell stack is accommodated;
an oxygen containing gas supply flow path configured to supply the oxygen containing gas to the fuel cell stack; and
a compressor disposed in the oxygen containing gas supply flow path;
wherein each of the two separator members includes a metal separator main body;
the separator main body is integrally formed with a seal bead portion in order to prevent leakage of a fluid, which is the oxygen containing gas, the fuel gas, or a coolant;
the seal bead portion protrudes from the separator main body in a stacking direction of the plurality of power generation cells; and
a rubber seal is interposed between a top part of the seal bead portion and the membrane electrode assembly member;
the fuel cell system further comprising:
a warm-up introduction passage configured to introduce the oxygen containing gas, which is discharged from the compressor into the oxygen containing gas supply flow path, into a case interior space between the stack case and the fuel cell stack; and
a switching unit configured to switch between a first state in which supply of the oxygen containing gas from the oxygen containing gas supply flow path into the fuel cell stack is permitted, together with blocking introduction of the oxygen containing gas from the oxygen containing gas supply flow path into the case interior space via the warm-up introduction passage, and a second state in which supply of the oxygen containing gas from the oxygen containing gas supply flow path into the fuel cell stack is blocked, together with permitting introduction of the oxygen containing gas from the oxygen containing gas supply flow path into the case interior space via the warm-up introduction passage;
wherein a pressure loss member configured to cause a loss in pressure of the oxygen containing gas flowing through the warm-up introduction passage to be increased is installed in the warm-up introduction passage.
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