Patent ID: 7282288

Claim:
A fuel cell system comprising: a fuel cell body; a hydrogen supply system supplying hydrogen containing gas to the fuel cell body; an oxygen supply system supplying oxygen containing gas to the fuel cell body; a cooling system adjusting the temperature of the fuel cell body; a water circulation system supplying water to humidify the fuel cell body and collecting water discharged from the fuel cell body; a generated heat amount calculating section configured to calculate a generated heat amount of the fuel cell body; a cooling performance calculating section configured to calculate a cooling performance of the cooling system; a temperature calculating section configured to calculate a fuel cell temperature of the fuel cell body on the basis of the generated heat amount calculated with the generated heat amount calculating section and the cooling performance calculated with the cooling performance calculating section; a collected water amount calculating section configured to calculate an amount of water collected from the water circulation system, while calculating, on the basis of water balance and heat balance related to the fuel cell temperature calculated with the temperature calculating section, a parameter satisfying the water balance and the heat balance; and a collected water amount controlling section configured to control the amount of collected water discharged from the fuel cell body on the basis of the amount of collected water calculated with the collected water amount calculating section.