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:
Sep. 03, 2002
Filed:
Sep. 24, 2001
Martin H. Ramsden, Lawrenceville, GA (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
This invention includes a circuit for charging multiple batteries simultaneously. The circuit monitors the amount of current being delivered to a first battery and compares it to a maximum available current. The circuit then delivers the difference to at least a second battery. The circuit includes a current sensing resistor and comparator for actuating a series switch to electrically couple and decouple a second battery depending upon the demands of the first battery. An optional microprocessor can manipulate a reference threshold to allow simultaneous charging of multiple batteries. The invention greatly reduces the time needed to charge a primary and spare battery.