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:
Feb. 11, 1997
Filed:
Mar. 09, 1995
Yuichi Fukuyama, Yokosuka, JP;
Nissan Motor Co., Ltd., Kanagawa-ken, JP;
Abstract
Disclosed is a series connection circuit for secondary batteries for preventing a reduction of energy usable as the builtup battery due to a difference of DOD of the batteries and a difference of voltage detection level of voltage detectors. The circuit includes voltage detectors for detecting the terminal voltage of the secondary batteries thereby to calculate the respective values of DOD thereof, transistors for discharging the secondary batteries independently, a charging unit to charge the secondary batteries and a controller for controlling the independent discharging operation of the transistors corresponding to the respective values of DOD. With the arrangement mentioned above, it is possible to equalize the values of DOD, whereby the reduction of usable energy caused by the increasing of difference of DOD can be prevented.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile