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STATE OF CHARGE ALGORITHM FOR LEAD-ACID BATTERY IN A HYBRID ELECTRIC VEHICLE

  • US 20030214303A1
  • Filed: 05/15/2002
  • Published: 11/20/2003
  • Est. Priority Date: 05/15/2002
  • Status: Active Grant
First Claim
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1. A method of determining the state of charge of a battery comprising:

  • integrating the charge going in and out of the battery to determine a current based state of charge measurement;

    compensating the current based state of charge measurement using a Peukert factor; and

    measuring the open circuit voltage to determine a voltage based state of charge measurement ; and

    compensating the current based state of charge measurement based on the voltage based state of charge measurement.

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