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bq34z100-g1 I.T. learning charge cycle after discharge with OCVTAKEN set

Peter Upczak
Intellectual 965 points
Other Parts Discussed in Thread: BQSTUDIO

Hi, I am near the end of a second charge cycle, and following instructions I will disconnect the charger for the battery to relax "until OCVTAKEN is set" but OCVTAKEN has been set during the entire charge cycle, by virtue of the previous discharge cycle settling (I hope this makes sense), so when should OVCTAKEN clear so that I can know this upcoming full-charge relax cycle is complete?

thanks,

  • 0
    TI__Guru 73830 points
    It should clear before the end of the charge cycle, if it is currently set.
  • 0 in reply to ThomasCosby
    Intellectual 965 points
    Tom - On the initial charge cycle the battery got slightly overcharged because the charge supply was not properly calibrated. On this charge cycle, the supply is cal'd to 29.4Vdc @ 2A max, I'm sitting at 29.48+ across the battery terminals (not the EVM sense path) and bqStudio shows 31184mv, 98% with current input leveling out at 25mA.
    FC is clear, OCVTAKEN is still set, could the initial overcharge be the root of it?
    thanks,