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:
May. 08, 2012
Filed:
Feb. 26, 2007
Sebastian Lienkamp, Budenheim, DE;
Matthew C. Kirklin, Pittsford, NY (US);
Sebastian Lienkamp, Budenheim, DE;
Matthew C. Kirklin, Pittsford, NY (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A fuel cell system and method for controlling relative humidity in a fuel cell system. A controller can be signally coupled to one or more sensors and configured to operate at least one flow manipulation device in response to changes in a relative humidity of a reactant passing through the cathode flowpath of the fuel cell in order to maintain the relative humidity within a prescribed range. The controller correlates one or more of a temperature setpoint, pressure setpoint, stoichiometry setpoint or actual operating condition of any of them to an operating condition of the system. In this way, a desired level of relative humidity can be achieved, maintained or both while minimizing the use of power-robbing flow manipulation devices, such as a pump, compressor, fan or related component.