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BQ40Z50-R1: The Different between Qmax update and Fast Qmax update? What is the accuracy different between Qmax and Fast Qmax?

Xijun Fan
Prodigy 80 points
Part Number: BQ40Z50-R1

1.Normal Qmax calculated as Qmax= PassedCharge / (DOD2– DOD1), how Fast Qmax calculated?

2.What is the accuracy for Qmax update and Fast Qmax update?

  • 0
    TI__Guru* 76230 points
    1.It is still pretty much the same formular, just that in this case, qmax uses DOD@EOC as one of the DOD points( if there isn't a DOD0 point taken) and then the other will be a DOD calculated after you are at a certain SOC closer to the end of discharge, typically after 15% SOC...
    2. The error in qmax with fast qmax update is usually less than 2%. With regular qmax update, it is less than 1%

    thanks
    Onyx