Patent ID: 7537851

Claim:
A fuel cell system, comprising: a stack that has an electricity generator, the electricity generator comprising a membrane electrode assembly, a separator disposed on a first surface of the membrane electrode assembly, and a separator disposed on a second surface of the membrane electrode assembly; a reformer to convert fuel to generate hydrogen gas; a fuel supply unit to supply the fuel to the reformer; an air supply unit to supply air to the stack; and a cooling water supply unit to supply cooling water to the stack, wherein each separator comprises a flow channel section through which the cooling water supplied from the cooling water supply unit passes, and wherein the flow channel section comprises: a first flow channel comprising a first via hole into which the cooling water flows, a second via hole from which the cooling water flows out, and a first groove that connects the first via hole and the second via hole to each other, the first flow channel being formed on the separator along a first edge thereof; and a second flow channel comprising a third via hole into which the cooling water flows, a fourth via hole from which the cooling water flows out, and a second groove that connects the third via hole and the fourth via hole to each other, the second flow channel being formed on the separator along a second edge thereof, the second edge being adjacent to the first edge.