Fuel cell activation device

A fuel cell activation device activating a fuel cell unit having an anode electrode, a cathode electrode, and a solid polymer electrolyte membrane sandwiched between the anode electrode and the cathode electrode, the device comprising:

• a first gas supply means having a first heating means configured to heat hydrogen-containing anode gas, the first gas supply means being configured to supply the anode gas to the anode electrode;
• a second gas supply means having a second heating means configured to heat oxygen-containing cathode gas, the second gas supply means being configured to supply the cathode gas to the cathode electrode;
• a control means configured to control a temperature of anode gas supplied by the first gas supply means and a temperature of the cathode gas supplied by the second gas supply means;
• a cell temperature detection means configured to measure a temperature in the fuel cell unit;
• and
• a relative humidity detection means configured to measure a relative humidity in the fuel cell unit,
• wherein the control means is configured to execute heating of the anode gas and/or the cathode gas when a water vapor content in the fuel cell unit is equal to or larger than a saturation water vapor content.