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BQ76952: Cell Balancing problem

sheng liu
Prodigy 40 points
Part Number: BQ76952
Other Parts Discussed in Thread: BQ76942

Hi teams;

During the battery charging process, the battery cell balancing leads to a greater voltage difference.

BQ76942-7S8P-2021-05-19.gg.csv【Log数据】10.7A Chg.xlsx

  • 0
    TI__Guru 54715 points

    Hi Sheng,

    The top cell must be used, the Vcell mode parameter 0x023F shows that it is not used. 

    Does the log show cells in logical order with other values listed as upper cells?

    The part has the Cell balancing active cells register, if you can log that you can see which cells it is balancing.

    The maximum resistance should be 100 ohm to the VCn inputs.  How is your circuit connected?