Patent ID: 9012100
Filing Date: 2015-04-21
Classification: H01M,Y02E

Abstract:
1. A fuel cell system, comprising: a wetness detecting section configured to detect a wetness of an electrolyte membrane of a fuel cell stack; a target stoichiometric ratio setting section configured to set a target stoichiometric ratio of the fuel cell stack based on the wetness so that the wetness becomes equal to a desired wetness; a smallest stoichiometric ratio setting section configured to set, based on a load, a smallest stoichiometric ratio necessary to prevent flooding of the fuel cell stack; and a stoichiometric ratio control section configured to intermittently increase and decrease an actual stoichiometric ratio when the target stoichiometric ratio is smaller than the smallest stoichiometric ratio, wherein the target stoichiometric ratio is set to have a value smaller than the smallest stoichiometric ratio when the load is low and the wetness indicates a relatively drier state.