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In-vehicle battery monitor

  • US 8,674,654 B2
  • Filed: 08/09/2011
  • Issued: 03/18/2014
  • Est. Priority Date: 11/03/1997
  • Status: Expired due to Fees
First Claim
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1. A battery monitor for monitoring a battery of an automotive vehicle, comprising:

  • a voltage sensor configured to monitor a voltage across the battery;

    a current sensor configured to monitor an electrical current through the battery;

    an analog to digital converter configured to convert sensed current from the current sensor to a digital value;

    a constant offset configured to reduce a quiescent current draw from the sensed current prior to digitizing the sensed current by the analog to digital converter; and

    a processor configured to measure a parameter of the battery as a function of sensed current and sensed voltage.

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