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BQ27541: Update status does not change from 0x04 to 0x05 after fully charged

William Puu
Prodigy 20 points
Part Number: BQ27541
Other Parts Discussed in Thread: BQSTUDIO

Hi,

I am trying to perform the learning cycle using bqStudio, and the problem I am having is that after the battery is fully charged, the Update Status does not get updated from 0x04 to 0x05, and I can see Qmax does not get updated either.  From the log, it looks like to me the VOK and RUP_DIS get updated as expected.  Could you please help?  Thanks!  The log file is attached.1Learning.gg.zip

  • 0
    TI__Guru* 76230 points
    Hi William,
    I reviewed your files and a few questions.
    -What your current is less than c/5 during discharge. Pls use c/7
    -How did you identify chem id? How much error was returned that chem id you used if it was a matched chem id.
    - if after the charge qmax fails to update , continue with the discharge and then charge and see if it gets to update. Maake sure to use c/7 discharge rate.
    thanks
    Onyx
  • 0 in reply to Onyx Ahiakwo
    Prodigy 20 points
    Hi Onyx,

    -What your current is less than c/5 during discharge. Pls use c/7
    Ans: I will try C/7
    -How did you identify chem id? How much error was returned that chem id you used if it was a matched chem id.
    Ans: I obtained Chem ID by collecting some charging/discharging data specified by one of the TI documents, and the data was submitted to the TI website for the math report. The error reported was max DOD error 1.02%.
    - if after the charge qmax fails to update , continue with the discharge and then charge and see if it gets to update. Maake sure to use c/7 discharge rate.
    Ans: I will try that.

    Thanks!