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Simple method for accurately determining a state of charge of a battery, a battery management system using same, and a driving method thereof

  • US 8,008,891 B2
  • Filed: 05/07/2007
  • Issued: 08/30/2011
  • Est. Priority Date: 06/26/2006
  • Status: Active Grant
First Claim
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1. A battery management system, comprising:

  • a sensor providing indications of charging and discharging current flowing through a battery, temperature of the battery, terminal voltage of the battery;

    a predictor counting the charging and discharging current, and using a measurement model of the battery to estimate a state-of-charge of the battery;

    a data rejection unit for generating information associated with errors attributable to a measurement model of the battery, as a function of at least one of the battery temperature, the charging and discharging current, the state-of-charge, and a dynamic of the charging and discharging current; and

    a measurement unit making a correction of the state-of-charge in dependence upon the measurement model and the information associated with the errors.

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