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:
Aug. 18, 2009
Filed:
Mar. 31, 2003
Hiroshi Sugiura, Tigasaki, JP;
Tetsuhiro Ishikawa, Nishikamo-gun, JP;
Masao Ando, Chita, JP;
Kenji Kato, Kariya, JP;
Hiroshi Sugiura, Tigasaki, JP;
Tetsuhiro Ishikawa, Nishikamo-gun, JP;
Masao Ando, Chita, JP;
Kenji Kato, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Kabushiki Kaisha Equos Research, Tokyo, JP;
Abstract
A power supply unit operation is switched depending on a load requirement. Namely, when the load requirement is smaller than a predetermined value, operation of a fuel cell system is stopped and electric power is obtained from a secondary battery during an intermittent operation mode. Alternatively, when the load requirement is equal to or larger than the predetermined value, the electric power is obtained from a fuel cell during a steady operation mode.