Battery charge monitor
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United States of America Patent
Stats
-
Aug 16, 1994
Grant Date -
N/A
app pub date -
Jun 24, 1992
filing date -
Jul 3, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An arrangement for detecting the state of charge of a vehicle battery (B201) in an electrical system (Z201) of a vehicle comprises an array of diodes (BD201) arranged to detect the initial voltage drop across the load when energised by a switch (M201). Each diode in the array defines a predetermined forward voltage drop and the diodes are arranged to energise respective thyristors (S201 to S208) when they conduct. These thyristors energise respective LEDs (201 to 208) which form a bar graph display, whereby the greater the voltage drop across the load (Z201) the greater the number of diodes which conduct and the greater the number of LEDs which are illuminated. Accordingly the bar graph display indicates the state of charge of the battery.
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