The actual performance of an electric vehicle depends on the capability of the battery to meet the power requirements of the drive train. In order to predict the vehicle operating range an accurate battery model is required. The behaviour of a battery depends on its state of charge. In the definition of the state of charge the characteristic relationship between available capacity and current must be accounted for. A voltage-current relationship is derived based on the polarization behaviour of a lead acid battery. This equation expresses the battery voltage as a function of current and state of charge. The theoretical equation is verified with data experimentally established at a 6 V. battery. A program is written that calculates the cumulative charge reduction during driving cycle operation. This gives the state of charge as the driving cycle proceeds. By combining this with the relationship between voltage, current and state of charge, the battery voltage during the total driving cycle can be determined. Battery voltage and energy are thus calculated for several types of driving cycles. These results will be compared with experimental data at a 6 V. battery.


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    Title :

    Battery state of charge model for driving cycle operation


    Additional title:

    Modell des Batterieladezustandes fuer zyklischen Fahrbetrieb


    Contributors:


    Publication date :

    1982


    Size :

    11 Seiten, 10 Bilder, 1 Tabelle, 9 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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