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:
Jan. 13, 2004
Filed:
Dec. 19, 2001
Richard J. DelRossi, Dallas, TX (US);
Gary V. Zanders, Fairview, TX (US);
Mark P. Enochson, Plano, TX (US);
Jimmie C. Vernon, Carrollton, TX (US);
Microchip Technology Incorporated, Chandler, AR (US);
Abstract
A battery monitoring system and method in accordance with the principles of the present invention, a capacity of interest is determined. This capacity of interest is the useful battery capacity required for an operation of interest; that is, the battery capacity at the discharge rate required for the operation of interest. The operation of interest may be a save-to-disk operation during a battery operated computer shutdown or a shutdown procedure for a personal digital assistant, for example. Given the capacity of interest, alarm settings are determined for a variety of voltage, discharge, and, optionally, temperature conditions. The trip points map, or index, voltage and discharge rate information for one or more discharge rates to one or more capacities of interest. When an indexed battery-voltage/discharge-rate combination that corresponds to the capacity of interest is encountered, an alarm may be set to indicate that, although the present voltage and discharge rates may indicate that there is more or less capacity than required for the critical operation, the capacity of interest (useful energy left at the discharge rate of interest) has been encountered.