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:
Jul. 19, 1983
Filed:
Jan. 04, 1982
Emil Emerle, Mount Prospect, IL (US);
Alex F Gawron, Park Ridge, IL (US);
Skil Corporation, Chicago, IL (US);
Abstract
The invention relates to a fast charge circuit suitable for use with battery cells which can be charged at a 4C rate. Line voltage is transformed, full wave rectified and applied to the battery pack. A pair of voltage comparators monitor a sensing voltage which is indicative of the charging voltage and the trough voltage of the battery cells. During a 'window' when the sensing voltage is less than a predetermined threshold and through voltage exceeds this threshold, the comparators indicate that charging should be terminated. Alternatively, if excessive temperature on the cells is detected or a selected amount of time passes without reaching full charge, fast charging is also terminated. After the fast charging interval trickle charging of the cells is employed to bring the battery pack to full charge and maintain it there.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile