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:
Oct. 03, 2017
Filed:
Dec. 22, 2011
Tomonari Koizumi, Tokyo, JP;
Yasuo Masuda, Tokyo, JP;
Yusuke Kubota, Tokyo, JP;
Akiyoshi Fukui, Tokyo, JP;
Akira Matsumoto, Tokyo, JP;
Tomonari Koizumi, Tokyo, JP;
Yasuo Masuda, Tokyo, JP;
Yusuke Kubota, Tokyo, JP;
Akiyoshi Fukui, Tokyo, JP;
Akira Matsumoto, Tokyo, JP;
Origin Electric Company, Limited, Saitama, JP;
NTT FACILITIES, INC., Tokyo, JP;
Abstract
A DC power supply system and a control method, which can continue charging of a storage battery with a constant current even if an assist current is needed due to, for example, overload during charging of the storage battery and can suppress a current output from the storage battery as much as possible. In a power supply system, when a charger operates at a potential of an output voltage smaller than the potential of the output voltage of a rectifier during charging of the storage battery, the output current of the charger is controlled so that a charging current Ie supplied from the charger to the storage battery is kept at a predetermined value, and when a load requires a current larger than the current supplied by the rectifier during charging of the storage battery, the potential of the output voltage of the rectifier is reduced smaller than the potential of the output voltage of the charger by a current drooping operation, and the diode is electrically connected, the output current of the charger is controlled so that the charger outputs the assistant current Ic supplied toward the load while the charging current Ie is kept at a predetermined value.