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. 21, 2012
Filed:
Nov. 12, 2010
Bradley Spare, Oceanside, CA (US);
Keith Oglesby, Livonia, MI (US);
Bradley Spare, Oceanside, CA (US);
Keith Oglesby, Livonia, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A method of controlling pressure of a fuel gas in a fuel cell stack is disclosed. The method includes establishing a specification for a fuel gas/oxidant gas delta pressure vs. time value, operating the fuel cell stack, monitoring the fuel gas/oxidant gas delta pressure vs. time value and reducing stress resulting from excessive pressure of the fuel gas by implementing at least one of the following: (1) inducing the fuel cell stack to convert excess fuel gas into electrical current; (2) shutting off supply of the fuel gas to the fuel cell stack; and (3) and raising an operating pressure of the fuel cell stack when the fuel gas/oxidant gas delta pressure vs. time value strays beyond the specification.