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BQ34Z100-G1: About Design Energy Scale and Current Calibration , dose we need Current Calibration when Design Energy Scale ??

March Jasper
Expert 2340 points
Part Number: BQ34Z100-G1

Hi  

Thank you very much many help us.

I have very simple question for BQ34Z100G1 setting .

Our customer battery  7s    30Ah  and   Typ Voltage is 3.8V

Yes  , This BQ34z100G1 is 1cell  base for Battery setting .

Design Energy  is    30000mAh   x  3.8V  =   114000mAhW   this value over  32767mAh . 

We need scaling       114000mAh  / 4 scale   =    28500mAh        * Design energy Scale is  4 

[ Question ] 

   If we did Design energy setting 4 ,  dose we need  Current calibration same as Scale (=divide )  is  4 ?? 

    * This mean  Design Energy setting is divide is 4,  and   For instance   Real Current is   4A. 

       Dose we need Calibration  is 1A  ??       * Divide 4 ??

  Or  Design Energy Scale dose not need  Other relation Current setting  ??   especially  Taper Current ??

    

  Sometime we confuse for this BQ34Z100G1   Battery Setting and Current setting . 

Regard

March Jasper  (  Japan Disty  Sugimoto ) 

 

  • 0
    TI__Mastermind 25955 points
    Hi March,

    For this capacity battery, If the battery will never charge or discharge at a rate above 1C, only the design energy scale will need to be utilized.

    If charge/discharge with this capacity is greater than 1C current scaling will be required. Configure the values with current scaling, for example, a factor of 2, and apply that scale factor to all values with A or W in them. If the design energy is still too large after this scale factor is applied, apply an additional design energy scale.

    Sincerely,
    Bryan Kahler
  • 0 in reply to Bryan Kahler
    Expert 2340 points

    Hi  Bryan 

    Thank you very much about this answer. 

    Yes , we understand ,  must need Current Scale over  1C ( =Battery Capacity 30000mA ).

    I want to  " double confirm " Design Energy Scale with Current Scale (=Divider ). 

    We do not change  Current Scale  when just Design Capacity  Scale .   *  Yes , Charge / Discharge Current under   30A  

    Is this correct ??   

    Thanks and Regard

    March Jasper  ( Japan Disty  Sugimoto ) 

  • 0 in reply to March Jasper
    TI__Mastermind 25955 points
    Hi March,

    Yes, for design energy scale please set it in the gauge and then modify the values given in table 15 of the datasheet.

    If current will not exceed +/- 30 A, current scaling should not be required.

    Sincerely,
    Bryan Kahler