Belenos Clean Power Holding Ag

Philipp Dietrich

Felix Buechi

Marcel Hofer

Uwe Hannesen

Akinori Tsukada

Jérôme Bernard

Félix Buechi

A method of operating a PEM fuel cell including an anode feed circuit and a cathode feed circuit for feeding of an anode side with a reactant gas and for feeding a cathode side with a cathode gas. A shut-down mode for shutting down an electricity generating operation of the fuel system includes decreasing the supply of reactant gas and cathode gas in response of a shut-down signal, monitoring an output voltage of at least one cell of a fuel cell stack, monitoring the reactant gas pressure and the cathode gas pressure, electrically shunting of the at least one fuel cell in response of the output voltage reaching a predefined voltage level, at least reducing the pressure of the anode side to a predefined pressure level by means of at least one pump, and filling and/or flushing of at least the anode side with an inert gas.

Method of shut-down and starting of a fuel cell

The present invention concerns a separator plate for use in a fuel cell stack with a substantially circular or oval main surface wherein a fluid flow path is defined by a plurality of channels extending substantially in parallel to each other and leading a fluid from a fluid supply port to a fluid discharge port. Adjacent channels merge such as to decrease the number of parallel channels from the supply port to the discharge port, thereby decreasing a cross sectional area of the flow path. The plurality of parallel channels comprises the following sections:

Fuel cell structure and separator plate for use therein

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Unterendingen, Switzerland

Philipp Dietrich