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. 04, 2015
Filed:
Dec. 07, 2012
GM Global Technology Operations Llc, Detroit, MI (US);
Derek R. Lebzelter, Fairport, NY (US);
Steven R. Falta, Honeoye Falls, NY (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A system and method for selectively operating a fuel cell stack in response to loss of a voltage signal from one or more fuel cells in the stack. If the voltage signal from the one or more fuel cells is lost, the method performs one or more remedial actions to cause the fuel cell stack to operate in a more stack safe condition. The method then determines whether the cell or cells whose voltage signal is lost was healthy, such as operating above a predetermined voltage threshold, prior to the voltage signal being lost. If the cell voltage signal was above the voltage threshold, then the fuel cell stack is operated normally under the remedial actions, and if the voltage signal is below the voltage threshold, then the fuel cell stack is operated in a power limitation mode.