Patent ID: 7309538
Filing Date: 2007-12-18
Classification: H01M,Y02E,Y02T

Abstract:
1. A fuel cell stack system comprising: a plurality of unit cells; separators connecting the unit cells and alternately layered with the unit cells to form a fuel cell stack as a power-generating section, each of the separators forming a passage for supplying gas to a unit cell; heat capacity changing means for reducing the capacity of the fuel cell stack to dissipate heat produced by power generation; a switch for output of a demand signal demanding the fuel stack system to start power generation; temperature detecting means for detecting temperature of the fuel cell stack; and control means for operating the heat capacity changing means to reduce the capacity of the fuel cell stack to dissipate heat, responsive to the demand signal for start of power generation and only when the detected temperature of the fuel cell stack is below a specified value.