| 主权项 |
1. A fuel cell system comprising:
a fuel cell that generates electricity by reaction between reaction gases including oxidant gas and fuel gas; a plurality of sensors to sense voltage, current, temperature, and internal pressure; an electricity amount calculating unit that calculates an amount of electricity generated during a voltage drop of the fuel cell from a current generated during the voltage drop; a reaction gas substance amount calculating unit that calculates an amount of substance of at least any one of the reaction gases in the fuel cell on the basis of the amount of electricity generated during the voltage drop; a gas volume calculating unit that calculates a gas volume in the fuel cell on the basis of the amount of substance of the at least any one of the reaction gases; a liquid water volume calculating unit that subtracts the gas volume from a fluid flow passage volume in the fuel cell to calculate a liquid water volume in the fuel cell, and a control unit that includes a central processing unit, a read only memory, a random access memory, a plurality of interfaces, and an electronic circuit, the control unit is programmed to:
stop supply of the oxidant gas to a cathode electrode of the fuel cell while maintaining supply of the fuel gas to an anode electrode of the fuel cell when the liquid water volume calculating unit calculates the liquid water volume in the cathode electrode, andstop the supply of the fuel gas to the anode electrode while maintaining the supply of the oxidant gas to the cathode electrode when the liquid water volume calculating unit calculates the liquid water volume in the anode electrode. |
