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. 03, 2012
Filed:
Jan. 31, 2007
Sriram Ganapathy, Rochester, NY (US);
John P. Salvador, Penfield, NY (US);
Balasubramanian Lakshmanan, Pittsford, NY (US);
Frank Leo, Honeoye Falls, NY (US);
Jason R. Kolodziej, West Henrietta, NY (US);
Sriram Ganapathy, Rochester, NY (US);
John P. Salvador, Penfield, NY (US);
Balasubramanian Lakshmanan, Pittsford, NY (US);
Frank Leo, Honeoye Falls, NY (US);
Jason R. Kolodziej, West Henrietta, NY (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
An algorithm for determining a polarization curve of a fuel cell stack. When the fuel cell stack is running and certain data validity criteria have been met, the algorithm goes into a data collection mode where it collects stack data, such as stack current density, average cell voltage and minimum cell voltage. When the stack is shut down, the algorithm uses a cell voltage model to solve a least squares problem to estimate predetermined parameters that define the polarization curve. If the estimated parameters satisfy certain termination criteria, then the estimated parameters are stored to be used by a system controller to calculate the polarization curve of the stack.