The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2016
Filed:
Apr. 27, 2009
Akinori Tsukada, Kirchdorf, CH;
Philipp Dietrich, Unterendingen, CH;
Marcel Hofer, Villmergen, CH;
Felix Buechi, Langenthal, CH;
Uwe Hannesen, Schüpfen, CH;
Akinori Tsukada, Kirchdorf, CH;
Philipp Dietrich, Unterendingen, CH;
Marcel Hofer, Villmergen, CH;
Felix Buechi, Langenthal, CH;
Uwe Hannesen, Schüpfen, CH;
Belenos Clean Power Holding AG, Bienne, CH;
Abstract
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.