| abstract |
A solid oxide fuel cell capable of accurately determining deterioration of a fuel cell module is provided. A solid oxide fuel cell (1) that varies output power according to a required power generation amount, a fuel cell module (2) comprising a plurality of solid oxide fuel cell cells (16), and fuel to the fuel cell module. Fuel supply means 38 for supplying, oxidant gas supply means 45 for supplying oxidant gas to the fuel cell module, water supply means 28 for supplying water to the fuel cell module, and fuel supply corresponding to the required power generation amount Control means for changing the amount of fuel supplied from the means, and the control means includes a deterioration determination means for determining deterioration of the fuel cell module, and the deterioration determination means is in a stable operating state of the fuel cell module. Deterioration judgment is executed when the vehicle is operated at. [Selection] Figure 1 |