Fuel cell assembly securing method for motor vehicle, involves regulating evacuation flow of tampon reserve to guaranty hydrogen concentration lesser than lower explosivity limit, and driving part of flow

摘要

The method involves collecting a part of anode output flow of a fuel cell (H) in a tampon reserve (3), and evacuating the reserve. The flow is mixed with a cathode output flow, if the cathode output flow is already mixed with output flow of a case (J). Evacuation flow of the reserve is regulated according to multiple parameters of output flow and/or operating condition of the cell and/or catalytic burner (8) so as to guaranty hydrogen concentration lesser than lower explosivity limit in the flow obtained after mixture. A part of the flow is driven after being mixed with the burner. An independent claim is also included for a device for passive securisation of a fuel cell assembly.