Patent ID: 7364811

Claim:
A fuel cell comprising: a housing; an electromotive unit which is located in the housing and generates power based on a chemical reaction; a fuel tank which is located in the housing and contains a fuel; an anode passage through which the fuel is circulated between the electromotive unit and the fuel tank; an air supply section which supplies air to the electromotive unit; a cathode passage which is connected to the electromotive unit and through which products from the electromotive unit are discharged; and a radiator section in the cathode passage, the cathode passage having a first passage which extends from the electromotive unit, a plurality of branch passages which diverge from the first passage, a reservoir portion which communicates with the first passage and respective ends of the branch passages and stores water discharged from the first passage and water condensed in the branch passages, and a recovery passage which guides the water stored in the reservoir portion into the fuel tank, the radiator section being located corresponding to the branch passages.