Patent ID: 7906241

Claim:
A fuel cell system comprising: at least two fuel cell stacks configured to receive supplied reaction gases comprised of an oxidant gas and a fuel gas to generate electricity by electrochemical reaction; a humidifier configured to humidify at least one of the reaction gases to be supplied to the fuel cell stacks; and a reaction gas supply pipe configured to feed the reaction gas from a reaction gas exhaust port of the humidifier to reaction gas supply ports of two of the fuel cell stacks, wherein the humidifier is disposed between the two fuel cell stacks such that the humidifier is provided in the space separating the two fuel cell stacks; and wherein the reaction gas supply pipe is bifurcated at a bifurcation point into two portions directed toward the two fuel cell stacks respectively, the lengths of the portions from the bifurcation point to the reaction gas supply ports of the two fuel cell stacks being substantially the same.