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GPCCHEM: Chem ID matching error

Abraham Rashid
Expert 3030 points
Part Number: GPCCHEM

Hi Team,

My customer is getting Chem ID for their battery using GPCCHEM tool, but the report contains below error and couldn't get the right ID.  Capacity of the battery is 165mAh, full charged voltage 4.45V. In the log data, discharge current is -15.63mA, which is around 0.1C. Battery is relaxed for 2h after charged to full and 5h after discharge. I attached the log data and GPC tool report, could you please help analyze the reason? Thank you!

Sample_C.zipSample_C-report.zip

  • 0
    TI__Guru** 102375 points

    Hello Abraham,

    I took a look through the data, I would recommend cutting out the charging portion and increasing the time intervals to 5-100seconds. The data looks good, I think just editing it a little should get you a good match. The only other thing I see that's a little off is ho high the charge voltage is.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    TI__Expert 3030 points

    Hello Wyatt,

    Thanks for your reply. I tried to edit the data by extracting data with 5s, 10s and 50s intervals, but the results are the same, the deviation is still 100%. I also tried cutting the charging section out, but the result didn't change. Charge termination voltage of the battery is 4.45V, will this be a problem for matching Chem ID? Another problem is I always see the warning "Warning: current in A detected " in the report, does this mean the current is too big?

  • 0 in reply to Abraham Rashid
    TI__Expert 3030 points

    This is the complete error message in the report:

    The following errors were reported by the calculation engine:
    Accuracy Error: Deviation is so high that it is most likely due to anomaly in the data. Please check that data files have recomended format, units and test schedule * Warning: current in A detected 

  • 0 in reply to Abraham Rashid
    TI__Guru** 102375 points

    Hello Abraham,

    I think what may be happening is the tool is expecting mA to be an integer, that's why it is giving an error saying that current in Amperes is detected. I would submit the log shortened to every 5sec samples with the mA converted to integers.

    Sincerely,

    Wyatt Keller