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BQ34Z100-G1: Capacity Data Is Abnormal

Jack Wang
Prodigy 80 points
Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: GPCCHEM

Tool/software:

Hi，

Recently, a Battery with abnormal data was received, and the SOC maintained 100% during discharge. Reading the data through Battery Management Studio, it was found that the True RC data has been slowly increasing under the condition of current 0, and has far exceeded the True FCC. May I ask what happened to BQ34Z100-G1? Please help analyze it. Attached are the log data and gg files.

8468.BQ-Log.zip

  • 0
    TI__Mastermind 18650 points

    Hi,

    1) Is the gauge reading current correctly? Has the device been calibrated? Are all the reading expected values?

    2) Was a proper chemID match optained using the GPCCHEM tool? Can you share the data and the report?

    3) was a learning cycle completed?

    4) There are many .gg in the .zip, which was used to create the log file sent?

    Regards,

    Diego

  • 0 in reply to Diego
    Prodigy 80 points

    Hi Diego

    1) The current has been calibrated, the readings are accurate, and the gg file is correct.

    2) The Chem ID(5660) is a match, and this is the ChemID obtained by the battery manufacturer (Cosmx) when the cell was sent to TI in 2022. I don't have this report.

    3) This battery has completed the learning cycle, and the user has used 39 cycles, and the capacity data before the problem occurred is normal.

    4) The log and gg files were captured using Battery Management Studio.

    After leaving the battery in the no-load state for about two days, I collected a new set of data yesterday, as shown in the attachment. I found that after a round of increase in True RC, it began to slowly decline again. In the process of data collection, there was a data update between True RC and True FCC, at which time the capacity data seemed to return to normal.

    1256.BQ-Log-1.zip

  • 0 in reply to Jack Wang
    TI__Mastermind 18650 points

    Hi Jack,

    1) 2) 3) got it, thanks

    4) thanks, and the .gg were generated throughout the discharge?

    Plese use the GPCRA tool to optimize the resistance values. Then send a log file after changing the values.

    GPCRA0 Application software & framework | TI.com

    Regards,

    Diego