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:
Jun. 01, 2004
Filed:
Mar. 28, 2002
Abstract
A hybrid power system ( ) for supplying power to a load ( ) such as an electric vehicle is provided. The power system ( ) includes an energy storage device ( ) and a fuel cell system ( ). When the state of charge of the energy storage device ( ) is greater than or equal to a predetermined state of charge, the energy storage device ( ) supplies all of the power to the load ( ). When the state of charge of the energy storage device ( ) falls below the predetermined state of charge, the fuel cell system ( ) supplies at least a portion of the power to the load ( ). In accordance with one aspect of the invention, the fuel cell system ( ) then supplies all of the power to the load ( ) as long as the power requirement of the load ( ) does not exceed an optimal power output of the fuel cell system ( ).