Patent ID: 8846257
Filing Date: 2014-09-30
Classification: H01M,Y02E

Abstract:
1. A fuel cell system comprising: a power generation section for performing power generation by being supplied a fuel and oxidant gas; a fuel supply section for supplying a liquid fuel to the power generation section side and in which a supply amount of the liquid fuel is able to be adjusted; a fuel vaporization section for supplying a gas fuel to the power generation section by vaporizing the liquid fuel supplied from the fuel supply section; a temperature detection section for detecting temperature of the power generation section; a current detection section for detecting a power generation current of the power generation section; and a control section comprising a subtraction section, a proportional-integral-derivative (PID) control section, a heat generation correction section, a usage rate control section, and a minimum value selection section, the subtraction section configured to determine a difference value between a target temperature and a temperature detected by the temperature detection section, the PID control section configured to calculate a supply amount of the liquid fuel based on the difference value determined in the subtraction section so that the temperature of the power generation section becomes constant, the heat generation correction section configured to calculate an energy conversion efficiency in the power generation section based on a power generation voltage of the power generation section or a given setting voltage, the usage rate control section configured to calculate a usage rate of fuel in the power generation section based on the power generation current detected by the current detection section, and to calculate the supply amount of the liquid fuel so that the usage rate of fuel becomes constant, and the minimum value selection section configured to determine a final supply amount of the liquid fuel taking into consideration a first fuel supply amount calculated based on the temperature of the power generation section and a second fuel supply amount calculated based on the usage rate of fuel.