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CIRCUIT-BASED METHOD FOR ESTIMATING BATTERY CAPACITY

  • US 20110208453A1
  • Filed: 02/23/2011
  • Published: 08/25/2011
  • Est. Priority Date: 02/23/2010
  • Status: Abandoned Application
First Claim
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1. A method for providing remaining capacity estimations, the method comprising:

  • receiving a battery, the battery having a manufacturer nominated capacity;

    measuring an initial state of charge (SOC) of the battery;

    discharging the battery and measuring a sequence of time-based discharge characteristics of the battery during the discharge of the battery;

    measuring a total operating time of the battery and a total consumed capacity;

    providing a set of relationship equations, the set of relationship equations being derived from a circuit-based battery model having a variable capacitor;

    utilizing a computing module to perform data fitting of the set of relationship equations based on;

    the initial SOC, the manufacturer nominated capacity, the total operating time, the total consumed capacity, and the sequence of time-based discharge characteristics, the computing module being configured for determining values for a plurality of parameters of the set of relationship equations through said data fitting; and

    obtaining a remaining capacity estimation equation based on the set of relationship equations after the values for the plurality of parameters are determined through said data fitting.

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