| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system which protects the system from freezing of water at a stoppage of the fuel cell, and has an excellent restarting responsiveness. <P>SOLUTION: This fuel cell system is equipped with a first protection mode preventing freezing of water inside the system by heating water supplied to the fuel cell, and a second protection mode preventing freezing of water inside the system by draining water from the fuel cell. A controller 20 calculates energy required when the system is protected with the first protection mode and energy required when the system is protected with the second protection mode based on a restarting predicted time and an outside temperature transition, and protects the system by selecting the protection mode having a smaller amount of required energy. <P>COPYRIGHT: (C)2004,JPO |
