Patent ID: 8557465

Claim:
A fuel cell including: a porous body disposed on a surface of a membrane electrode assembly, the porous body being a flow path for reaction gas; a plurality of discharge flow paths connected to the porous body that pass offgas and liquid discharged from the porous body; a first path that connects a first discharge flow path of the plurality of discharge flow paths to the porous body and that causes liquid in the porous body and liquid in the first discharge flow path to be continuous due to viscosity of liquid, thereby discharging the liquid in the porous body to the first discharge flow path in preference to the offgas; and a second path that connects a second discharge flow path of the plurality of discharge flow paths to the porous body and that prevents liquid in the porous body and liquid in the second discharge flow path from becoming continuous due to viscosity of liquid, thereby discharging the offgas to the second discharge flow path in preference to the liquid in the porous body, wherein the first path includes an inlet of the first discharge flow path that directly connects to the porous body, thereby causing liquid in the porous body and liquid in the first discharge flow path to be continuous due to viscosity of liquid, and the second path includes an inlet of the second discharge flow path that is separated from the porous body by a hollow portion of a predetermined size, thereby preventing liquid in the porous body and liquid in the second discharge flow path from becoming continuous due to viscosity.