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:
Jul. 14, 2020
Filed:
Aug. 25, 2017
Daimler Ag, Stuttgart, DE;
Ford Motor Company, Dearborn, MI (US);
Nissan Motor Co., Ltd., Yokohama, JP;
Michael Procter, North Vancouver, CA;
Yosuke Fukuyama, Vancouver, CA;
Richard Fellows, Vancouver, CA;
Takeshi Shiomi, Burnaby, CA;
Laura Iwan, Burnaby, CA;
Daimler AG, Stuggart, DE;
Ford Motor Company, Dearborn, MI (US);
Nissan Motor Co., LTD., Kanagawa, JP;
Abstract
Methods are disclosed for starting up a fuel cell system from starting temperatures below 0° C. The methods apply to systems comprising a solid polymer electrolyte fuel cell stack whose cathodes comprise an oxygen reduction reaction (ORR) catalyst and whose anodes comprise both a hydrogen oxidation reaction (HOR) catalyst and an oxidation evolution reaction (OER) catalyst. In the methods, from the beginning of starting up until the fuel cell temperature reaches 0° C., the fuel cell stack current is kept sufficiently low such that the current density drawn does not exceed the stack's capability for the oxidation evolution and the oxygen reduction reactions to occur at the anode and cathode respectively (i.e. current density drawn is less than the stack's maximum OER/ORR current density).