Fuel cell system, and method for controlling this system

Abstract

Fuel cell system, and method of controlling this system. This fuel cell system (1) comprises a fuel cell (10) and an air circuit (30) which includes a supply line (31) provided with a compressor (31.1), a discharge line (32), a humidifier (33) arranged partly in the supply line and partly in the discharge line, and a recirculation branch (36) connecting the discharge line to the supply line. The recirculation branch is connected to the supply line both downstream of a first flow control valve (31.3) and upstream of the humidifier, while being connected to the discharge line both downstream of the humidifier and upstream of a second flow control valve (32.1). The recirculation branch is provided with a pump (36.1) which, when the first and second valves are closed, circulates air in a closed loop (A2) passing through the battery and the humidifier but not through the compressor. Figure for the abbreviation: Figure 1.

Claims

[Claim 14] A control method according to claim 13, wherein the first time is switched to the second time when the temperature of a cooling fluid at a cooling inlet (15) of the fuel cell (10) exceeds a predetermined value.