Patent ID: 8431277
Filing Date: 2013-04-30
Classification: H01M,Y02E

Abstract:
1. A fuel cell system comprising a wet condition determination unit that determines water balance in a fuel cell and determines the wet condition of the fuel cell, from an inflow water amount and an exhausted water amount to and from the fuel cell and a generated water amount therein, wherein the wet condition determination unit is programmed to calculate the inflow water amount, the amount of water exhausted as a gas component from the fuel cell and the amount of water exhausted as a liquid component from the fuel cell, both of which are each provided as the exhausted water amount, and the generated water amount, on the basis of the physical amount of inflow gas to the fuel cell, the physical amount of exhaust gas from the fuel cell, and the state quantity of the fuel cell, wherein the wet-condition determination unit is further programmed to calculate the amount of water exhausted as a gas component by using a flow rate, pressure and humidity or a dew-point temperature or temperature as the physical amount of the exhaust gas, and wherein the wet condition determination unit is further programmed to calculate the amount of water exhausted as a liquid component during actual operation of the fuel cell system on the basis of the relationship of the amount of water exhausted as a liquid component from the fuel cell with respect to the flow rate of the exhaust gas obtained in advance prior to the actual operation of the fuel cell system, the flow rate of the exhaust gas obtained during the actual operation of the fuel cell, and the temperature of the fuel cell or the exhaust gas.