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:
Dec. 15, 2009
Filed:
May. 06, 2003
Applicant:
Martin T. Pearson, Burnaby, CA;
Inventor:
Martin T. Pearson, Burnaby, CA;
Assignee:
Ballard Power Systems Inc., Burnaby, British Columbia, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
Current pulsing improves the performance of fuel cells in a fuel cell stack based power system. Voltage clamping limits the voltage peaks that occur after a current pulse. In a hybrid power system, an electric storage device supplies the loads during current pulsing. The electric storage device may sink current to achieve the voltage clamping, and/or power system may employ other the voltage clamping circuits.