To maximize the capacity and reliability of a series connected battery pack, a new selective equalizer developed from the earlier ramp equalizer is proposed. A set of bipolar junction transistors (BJTs) controlled by a microcontroller is used to route equalization current to the lowest voltage batteries. Since only the lowest voltage batteries are connected to the equalizer, the need for uniform transformer leakage inductance is avoided, and a lower power level can be used since no excess current flows to the other batteries. An equalization experiment has shown that a 37 W selective equalizer had a slightly better effect on a 24-battery pack than a 63 W ramp equalizer.


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    Title :

    Selective buck-boost equalizer for series battery packs


    Contributors:
    Ming Tang (author) / Stuart, T. (author)


    Publication date :

    2000-01-01


    Size :

    526790 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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