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:
Jun. 28, 2016
Filed:
Apr. 21, 2010
Bruce J. Clingerman, North Rose, NY (US);
Aaron Rogahn, Rochester, NY (US);
Jun Cai, Rochester, NY (US);
Joseph C. Gerzseny, Spencerport, NY (US);
Manish Sinha, Pittsford, NY (US);
Steven D. Burch, Honeoye Falls, NY (US);
Abdullah B. Alp, West Henrietta, NY (US);
Bruce J. Clingerman, North Rose, NY (US);
Aaron Rogahn, Rochester, NY (US);
Jun Cai, Rochester, NY (US);
Joseph C. Gerzseny, Spencerport, NY (US);
Manish Sinha, Pittsford, NY (US);
Steven D. Burch, Honeoye Falls, NY (US);
Abdullah B. Alp, West Henrietta, NY (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for shutting down a fuel cell system including operating a fuel cell stack. the method includes providing an increased cathode air flow so as to dry fuel cell membranes in the stack until a first desired level of high frequency resistance is achieved, rehydrating the cell membranes of the stack until a second desired level of high frequency resistance is achieved, and operating the stack with a decreased cathode input relative humidity until a third desired level of high frequency resistance is achieved.