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:
Apr. 10, 2012
Filed:
Oct. 07, 2008
Nathan Cruise, Phoenix, MD (US);
Tarek Aydin, Edgewood, MD (US);
Keith D. Flaharty, Wrightsville, PA (US);
Fugen Qin, Baltimore, MD (US);
Steven J. Phillips, Ellicott City, MD (US);
Nathan Cruise, Phoenix, MD (US);
Tarek Aydin, Edgewood, MD (US);
Keith D. Flaharty, Wrightsville, PA (US);
Fugen Qin, Baltimore, MD (US);
Steven J. Phillips, Ellicott City, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
A rechargeable battery pack for a power tool can have a data terminal that provides a signal that is indicative of whether the voltage is below a threshold and can serve as both a pre-charge signal for a charger and as a stop-discharge signal for a power tool. A charger can include a power supply circuit and a voltage detection circuit. A charger control module can receive a signal indicative of the voltage of the battery pack and determine a pre-charge time based on the voltage and can monitor a change in the voltage of the battery pack during the pre-charge operation and stop the pre-charge operation based on the change in voltage and the time period.