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. 15, 2003
Filed:
Feb. 15, 2002
Nasser H. Kutkut, Madison, WI (US);
David Brobst, Chico, CA (US);
Power Designers, LLC, Madison, WI (US);
Abstract
Activity based battery monitoring is carried out with a minimal requirement for data memory capacity by determining events defined between changes in the battery states of charge, discharge and open circuit. Battery parameters are sampled at high sampling rates but only a relatively small number of memory data fields are stored in a non-volatile memory and updated after each event. In operation, battery current is monitored to determine a change in battery state. At the end of an event, at which time the battery changes state, a limited number of data fields, which nonetheless accurately categorizes the event, can be stored to the non-volatile memory, including the event type, the event start time, total ampere hours during the event, and various transient conditions during the event such as maximum voltage, current and temperature and minimum voltage, their times of occurrence, and any alarms that are triggered during the event.