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WEBENCH® Tools/BQ34Z100-G1: before starting learning cycle after updating all parameters full charge capacity is updated mismatch

manoj sai
Expert 2305 points
Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: BQSTUDIO

Tool/software: WEBENCH® Design Tools

hi every one ,

iam testing battery of type  : lead acid .12v 1.3Ah.

before starting learn cycle , after updating all parameters in bqstudio, full charge capacity is updated to 1200 Mah , but it should be 1300 Mah.

please verify my gg file, what parameter is required to update exact value. i  attached the gg file  and battery datasheet.4353.0207.Amptek_battery_12v_1.3Ah_datasheet.pdftest_gg_file_7_may_18.gg__chg.rar

  • 0
    TI__Genius 10830 points
    Hi Manoj,
    Here is a optimization cycle process that should work for your PbA cells.

    Configure the dataflash with appropriate parameters suitable for your application; configure pack's chemistry and perform calibration.
    Activate impedance track.
    Charge the pack to charge termination.
    Allow the pack to rest until the OCVTAKEN flag sets.
    Discharge the pack at a C/8 rate to the Termination Voltage.
    Allow the pack to rest until the OCVTAKEN flag sets. Qmax should update and Update Status should increment to 05.
    Fully charge the pack to charge termination.
    Allow the pack to rest until the OCVTAKEN flag sets.
    Discharge the pack at a C/8 rate to the Termination Voltage.
    Allow the pack to rest until the OCVTAKEN flag sets. The Ra table should update and Update Status should increment to 06.

    Regards,
    David
  • 0 in reply to David Hien
    Expert 2305 points

    hi david , 

    My problem is .. full charge capacity is 1300 Mah , but it is showing 1199Mah... 

  • 0 in reply to manoj sai
    TI__Mastermind 25955 points

    Hi Manoj,

    There are currently 10 open threads on this issue, and as a result, the information is extremely fragmented.

    In an attempt to help you with your gauge in a more efficacious manner, all support will continue in this thread: https://e2e.ti.com/support/power_management/battery_management/f/180/t/688147


    Please post in the above-linked thread so we may drive towards a solution.

    Sincerely,
    Bryan Kahler