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Original question:

BQ27542-G1: BQ27542-G1

Linux/BQ27542-G1: capacity will not rise up after a high current discharging.

Shaohua Wu
Prodigy 130 points
Part Number: BQ27542-G1

Tool/software: Linux

Hi ,Ti team

     We try to discharging a phone battery(3000mAh) with a 1.5A current. battery capacity will drop to 0% and trigger a phone shutting down. After charging battery again for a long time(about one hour), the capacity is always reported as 1%, and FCC dropped to just 300mAh. After charging FULL again,  the FCC changed back to 2980mAh. Can you please tell us what happened?

  • 0
    TI__Guru* 76230 points
    without proper log files, anything said will just be speculation. it might be that qmax wasn't properly learned or your resistance values didn't properly update with regards to the age of the battery. It could also be that the battery was over discharged at cold temperatures, causing FCC to get learned to a wrong value.. Without a log file of the events it will be difficult to say exactly what occurred.
    thanks
    Onyx