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. 01, 2003
Filed:
Feb. 07, 2001
Jung S. Yi, Mansfield, CT (US);
Jonathan Puhalski, Winsted, CT (US);
UTC Fuel Cells, LLC, South Windsor, CT (US);
Abstract
A fuel cell having a polymer electrolyte membrane ( ) between anode ( ) and cathode ( ) reactant flow fields includes a variable blower ( ), the power control signal ( ) of which is provided by a controller ( ) in response to a current signal ( ) indicative of the current of the load ( ) sensed by a current detector ( ). The controller responds to a schedule of blower power as a function of load current density to provide a stochiometry, S, which is fixed at a stochiometry of A, plus or minus a range of stochiometries, D, below a certain current density, C, and varies with higher current densities as: S=[A+B(i−C)]±D, where B is he slope of stochiometry as a function of current density, and i is the actual current density.