Patent ID: 6582841
Filing Date: 2003-06-24
Classification: C01B,H01M,Y02E,Y02P

Abstract:
A fuel cell system comprising:a reformer reforming fuel to produce reformed gas; a combustor supplying heat to the reformer; an air supply unit supplying air; a fuel cell producing electric power by reacting the reformed gas and an oxygen gas contained in the air supplied by the air supply unit; an exhaust system returning exhaust reformed gas and exhaust air from the fuel cell to the combustor; an exhaust reformed gas ingredient concentration estimation unit calculating ingredient concentration of the exhaust reformed gas by using given parameters and producing an estimated output representing the ingredient concentration of the exhaust reformed gas; a combustor's output temperature detector detecting an output temperature of the combustor and producing a combustor's output temperature detection output; a combustor temperature controller controlling the output temperature of the combustor, in response to the estimated output of the ingredient concentration of the exhaust reformed gas and the combustor's output temperature detection output, to attain a predetermined target temperature; a parameter correction discriminating section discriminating whether correction is required in the given parameters of the exhaust reformed gas ingredient concentration estimation unit and producing a parameter correction discriminating output; and a parameter correction data calculating section producing a parameter correction data in response to the parameter correction discriminating output to correct the given parameters of the exhaust reformed gas ingredient concentration estimation unit.