Battery Monitor
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United States of America Patent
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-
Jul 14, 1992
Issued Date -
N/A
app pub date -
Dec 3, 1990
filing date -
Aug 21, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A battery monitor is disclosed for indicating the projected time until the battery reaches a lower threshold value indicative of the energy capacity of the battery. The battery monitor includes a microprocessor which iteratively reads the value of the battery voltage. The microprocessor then determines the rate of discharge of the battery and projects the future values of the battery voltage as well as the projected time at which the battery voltage attains the threshold voltage. This projected time is then displayed on a visual indicator, such as an LCD display. In an alternate embodiment, warning lights are selectively illuminated to indicate a full charge, medium charge and low charge conditions.
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