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:
Jan. 06, 2015
Filed:
Jun. 28, 2010
Dongmei Chen, Auston, TX (US);
Victor W. Logan, Naples, NY (US);
Matthew C. Kirklin, Coleman, MI (US);
Dongmei Chen, Auston, TX (US);
Victor W. Logan, Naples, NY (US);
Matthew C. Kirklin, Coleman, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method for controlling relative humidity (RH) of a cathode side of a fuel cell stack in a fuel cell system that includes an RH sensor on a cathode inlet line for providing an RH signal indicative of the RH of cathode inlet air. If the RH sensor is providing a valid RH signal, the RH signal is calculated as an RH average of the cathode inlet air. When the RH sensor is not providing a valid RH signal, the calculated RH average is utilized to control the cathode inlet air RH. If the RH sensor is not providing a valid signal during start-up, then the stack power is temporarily set at an optimum level for a known cathode inlet air RH.