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About bq40z60..

Other Parts Discussed in Thread: BQ40Z60

Dear Sir ,

What is difference between learning cycle and optimization  cycle in bq40z60??

Regards,

Sachin

  • The optimization cycle is run as part of the development process and the first Ra table Qmax updates are made for the pack. The amount that they can change is not restricted and the Qmax update requires a full discharge. (at least a 90% change in DOD) The learning cycles occur during normal use as the Ra table and Qmax update to maintain gauging accuracy as the cells age. The gauge only requires a 37% change in DOD during the learning cycles and the amount that the Ra values and Qmax can change is limited to help to prevent false updates / corruption.
  • Dear Tom,

    Thanks for your quick reply and support ..
    As i posted earlier in other post ,i am trying to make golden image for my battery pack.

    Now i configure data flash with appropriate parameters suitable for my application, configure pack chemistry and perform calibration.

    Should i use  gauge enable command or use learning cycle  manual mode  option present in bq studio to start learning cycle??

    Please confirm..



    Regards,
    Sachin

  • Also provide correct chem id for SAMSUNG SDI ICR18650-26H.
  • ChemID 2077 was assigned to that cell.
  • I would run the optimization cycle manually. I have not worked with the Learn Cycle tool.
  • Dear Tom ,


    I had completed optimization cycle successfully for 3S1P battery pack (use SAMSUNG ICR18650 26 H) lithium ion cell.

    After compilation of optimization cycle in gas gauging i got QMAX cycle count : 2  and Update status : 06.

    Now my question is.

    1) How to create golden image from this gg.csv file?? or explain all the term to create golden image???

    2) During calibration of applied pack voltage i got below mention error ? please see screenshot

    Please help in this regards,

    Regards,

    Sachin Ghorse

  • Here are the steps to create the golden srec file.

    •Run the Optimization Cycle to update Qmax and the Ra-table.
    •Go to the Data Flash window and press the Read All button.
    •Export the gg.csv file
    •Edit the gg.csv file using a text editor. e.g. Notepad. Do not use Excel.
    •Set the Update Status to 02 and set the Cycle Count to 0.
    •Load the default .srec file into the device.
    •Load the ChemID into the device.
    •Load your modified gg.csv file into the device and press the Write All button. (Be sure to import the calibration data as well.)
    •Save the golden .srec file.
    Do you get the calibration error when just calibrating Cell1 without calibrating the full stack? I also assume that the gauge is not sealed?
  • Dear Tom,


    I got this error during calibration of  Applied  Pack voltage only , i am not facing problem during calibration of Applied cell voltage and Applied battery voltage
    .

    Regards,

    Sachin Ghorse

  • The Calibrate Pack Voltage calibrates the adapter voltage. You will need to apply an adapter voltage and enter this value in the field and the voltage has to be less than 20V. You should calibrate this with the charger turned off.
  • Dear Tom,

    I had complete my BMS using Bq40z60 and its working fine.. Thanks for your help which i got time to time.

    Do you have any paper or explanation on columb counter in bq40z60 ?? Or should you explain how columb counter work in bq40z60.

    Regards,
    Sachin Ghorse