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BQ34Z100: update status

Sunrain
Intellectual 615 points
Part Number: BQ34Z100


Hello,
1. Under what conditions can BQ34Z100 learn update status=0E. Only learn 06 now.
2. Is it necessary to set [Min % Passed Chg for 1st Qmax] to 90, and what will be the effect of setting 50? The battery is LiFePO4

  • 0
    TI__Expert 8365 points

    Hi,

    1. 0E can be achieved through one more charge cycle after 06.

    2. I would strongly advise leaving [Min% Passed Chg for 1st QMax at 90%]. Setting this to a lower value may lead to large inaccuracies in QMax especially since this is the initial QMax update. Also, LiFePO4 has a very large flat region in its OCV curve so resting and updating QMax anywhere in this region would further QMax inaccuracies.

    Best Regards,

    Jackson

  • 0 in reply to Jackson DiGiovanna
    TI__Expert 8365 points

    That being said, 0E is only for multi cell to indicate that cell balancing is active after a field QMax update is complete. As this is a single cell gauge, going to 0E has no difference from 06 so I would not worry about that at all.