In-vehicle battery monitor

  • US 6,633,165 B2
  • Filed: 09/20/2001
  • Issued: 10/14/2003
  • Est. Priority Date: 11/03/1997
  • Status: Active Grant
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First Claim
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1. A method of monitoring a battery in an automotive vehicle having an engine, comprising:

  • setting a stored battery parameter value to an initial value;

    measuring a first parameter of the battery;

    changing the stored battery parameter value as a function of the measured first parameter;

    measuring a second parameter of the battery during or following a period when the battery is charging;

    changing the stored battery parameter value as a function of the measured second parameter; and

    providing an output related to a condition of the battery as a function of the stored battery parameter value.

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