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:
Dec. 15, 1998
Filed:
May. 14, 1997
Akira Kaneko, Shirakawa, JP;
Integran, Inc., Tokyo, JP;
Japan Tobacco, Inc., Tokyo, JP;
Abstract
A battery charger includes charge control circuits each connected in parallel with an associated one of serially-connected battery cells. Each charge control circuit includes a switching device; a comparator, having a hysteresis characteristic determined by two threshold voltages, e.g., a safe charging voltage and an optimum charging voltage, for comparing the battery voltage with one of the threshold voltages selected according to a changing direction of the battery voltage; a reference voltage source for generating a reference voltage corresponding to either one of the threshold values; and a driving circuit for receiving a comparator output to render the switching device conductive or cutoff. When the battery voltage falls between the threshold voltages, the switching device becomes conductive to cause a constant current to flow from the battery cell to the switching device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile