Patent ID: 9252444
Filing Date: 2016-02-02
CPC Classification: H01M,Y02E,Y02T

Claim Text:
1. A fuel cell system, comprising: a fuel cell having an anode and a cathode configured to conduct electro-chemical reaction, fuel gas being supplied to the anode, and oxidant gas being supplied to the cathode; a fuel gas circulation path configured to circulate the fuel gas supplied to the anode and supply the fuel gas to the fuel cell; a purge valve disposed at downstream of the fuel cell in the fuel gas circulation path configured to open or shut off the fuel gas circulation path; a control unit configured to determine whether inside the fuel gas circulation path is in a dry condition or a humid condition and controlling the purge valve; and a memory device disposed in the control unit configured to memorize a value in said memory device to indicate whether the fuel gas existing in the fuel gas circulation path is replaced or not with air which is different from the fuel gas when the fuel cell stops the electro-chemical reaction, wherein after the fuel cell system is started up, the control unit configured to control the purge valve in such a manner that an amount of fluid gas discharged from the fuel gas circulation path when the value memorized in said memory device indicates that the replacement of the fuel gas with the air has been conducted and the inside of the fuel gas circulation path is in the dry condition is less than the amount of fluid gas discharged from the fuel gas circulation path when the value memorized in said memory device indicates that the replacement of the fuel gas with the air has not been conducted.