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:
Nov. 01, 2005
Filed:
Dec. 23, 2002
Koichiro Hara, Toyota, JP;
Nobuki Hattori, Toyota, JP;
Osamu Nakanishi, Obu, JP;
Shiroh Yamasaki, Toyoake, JP;
Koichiro Hara, Toyota, JP;
Nobuki Hattori, Toyota, JP;
Osamu Nakanishi, Obu, JP;
Shiroh Yamasaki, Toyoake, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
When power failure of a commercial power source is detected, an inverter interrupts power supply to a power line extending between the commercial power source and a load via a circuit breaker. Then the control mode of a load DC—DC converter is changed to a constant voltage control to maintain stable operation of a fuel cell. This allows the accessory DC—DC converter to supply power to accessories used for operating the fuel cell power generation system. Also, the quantity of city gas to be supplied to a reformer is changed to a quantity necessary for the fuel cell to generate power for driving the accessories. This makes it possible to avoid excessive production of hydrogen, thus improving energy efficiency of the fuel cell power generation system.