Fuel cell system

A fuel cell system comprising:

• a fuel cell configured to generate electric power by electrochemical reactions between an oxygen gas and a hydrogen gas;
• an oxygen gas supply path configured to supply the oxygen gas to the fuel cell;
• an oxygen circulation path configured to return to the oxygen gas supply path an oxygen-containing gas containing the oxygen gas discharged from the fuel cell;
• a hydrogen gas supply path configured to supply the hydrogen gas to the fuel cell;
• a hydrogen circulation path configured to return to the hydrogen supply path a hydrogen-containing gas containing the hydrogen gas discharged from the fuel cell;
• an oxygen purge channel configured to purge the oxygen-containing gas from the oxygen circulation path to an outside of the fuel cell system;
• a hydrogen purge channel configured to purge the hydrogen-containing gas from the hydrogen circulation path to the outside of the fuel cell system;
• an oxygen purge valve disposed on the oxygen purge channel;
• a hydrogen purge valve disposed on the hydrogen purge channel;
• and
• one or more processors that execute computer-executable instructions stored in a memory, wherein the one or more processors execute the computer-executable instructions to cause the fuel cell system to:
• control the oxygen purge valve and the hydrogen purge valve in a manner that a valve opening period of the oxygen purge valve does not overlap with a valve opening period of the hydrogen purge valve.