Patent ID: 7858248
Filing Date: 2010-12-28
Classification: H01M,Y02E,Y02T

Abstract:
1. A fuel cell system comprising: a fuel cell stack comprising plural unit fuel cells, each unit fuel cell comprising a fuel electrode, an air electrode, and an electrode membrane placed between the fuel electrode and the air electrode, a fuel gas channel through which a fuel gas is supplied to the fuel electrode, and an air channel through which air is supplied to the air electrode, and a coolant channel through which a coolant flows; coolant temperature control means configured to adjust a temperature of the coolant; judgment means configured to judge whether or not it is necessary to increase an oxygen concentration in the air at an area near an air outlet of the air channel; and generation and output means programmed to generate based on the judgment result transferred from the judgment means an instruction signal indicating that the temperature of the coolant is changed to a concentration available temperature at which a water vapor in the air at the area near the air outlet in the air channel and then to output the instruction signal to the coolant temperature control means to adjust a temperature of the coolant.