Method for determining the charge state of a battery, in particular a vehicle starter battery
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United States of America Patent
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Jan 28, 1997
Grant Date -
N/A
app pub date -
Jun 23, 1995
filing date -
Nov 19, 1993
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A method is specified for determining the charge state of a battery, for example a vehicle starter battery, in which a charge balance is carried out by evaluating the charging current and the discharging current. This charge balance is checked with the aid of the measured battery open-circuit voltage and corrected. Depending on further variables, for example, the battery temperature, a time interval is determined which can be used to detect how long the battery can still supply an acceptable discharging current under the given conditions. This time interval is optimized with the aid of suitable correction functions, and serves as a measure of the present charge state of the battery.
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