Method for determining the internal resistance of a battery
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United States of America Patent
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Mar 8, 2011
Grant Date -
Oct 23, 2008
app pub date -
Nov 16, 2005
filing date -
Dec 29, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for determining the internal resistance of a battery, in particular a lead-acid vehicle battery, and an associated device for performing the method are described, in which differential values are calculated from the measured values for the voltage and the current, and these differential values are processed with the aid of a regulator, such as an integrator or a PID regulator. A signal results at the output of the regulator, which corresponds to the reciprocal value of the internal resistance of the battery. This signal is taken into consideration again in each following computing step. The functional capability may be inferred from its internal resistance.
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