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. 20, 2006
Filed:
Feb. 26, 2004
Masaya Ichinose, Hitachiota, JP;
Kenji Takeda, Hitachi, JP;
Motoo Futami, Hitachiota, JP;
Masahiro Komachiya, Hitachinaka, JP;
Kenji Kubo, Hitachi, JP;
Masaya Ichinose, Hitachiota, JP;
Kenji Takeda, Hitachi, JP;
Motoo Futami, Hitachiota, JP;
Masahiro Komachiya, Hitachinaka, JP;
Kenji Kubo, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Home & Life Solutions Inc., Tokyo, JP;
Abstract
A battery voltage Ef of a fuel cellis detected, and a current instruction value which transformed an electric power instruction value Pfc of the fuel cell is reduced at falling-down of the voltage Ef. A current limitermakes the current instruction value a limit value at the time of the falling-down of Ef, and reduces the limit value according to the fall of Ef. For example, current instruction value is restricted so as to begin to reduce battery current IFC at voltage drop alarm level (first threshold value), and become zero at voltage drop protection level (second threshold value).