Abstract: An apparatus and method of determining remaining capacity in a battery, including the following steps: detecting the presence of a battery within one of a plurality of specified terminals; automatically initiating a timed pulse load test on the battery upon detection in a terminal; continuously passing current from the battery through a specified resistive load for the terminal; measuring a voltage of the battery while under the resistive load; comparing the measured voltage to a discharge voltage profile of the battery; and, computing the measured voltage as a percent of remaining battery capacity.
Type:
Grant
Filed:
November 8, 2002
Date of Patent:
November 23, 2004
Assignee:
ZTS, Inc.
Inventors:
Phillip David Zimmerman, David Eric Zimmerman, Gary Lee Claypoole