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SYSTEMS AND METHODS FOR DETERMINING THE STATE OF CHARGE OF A BATTERY UTILIZING CONFIDENCE VALUES

  • US 20120290235A1
  • Filed: 05/13/2011
  • Published: 11/15/2012
  • Est. Priority Date: 05/13/2011
  • Status: Active Grant
First Claim
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1. A method for determining a state of charge of a vehicle battery comprising:

  • receiving, at a processor, sensor data indicative of a voltage, current, and temperature of the battery;

    determining a first state of charge value using a voltage-based strategy on the sensor data;

    calculating a first confidence value for the first state of charge value;

    determining a second state of charge value using a current-based strategy on the sensor data;

    calculating a second confidence value for the second state of charge value;

    comparing the first confidence value and second confidence value;

    selecting between the first state of charge value and the second state of charge value based on the comparison; and

    storing the selected state of charge value in a memory as an overall state of charge value.

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