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BQ34Z100-R2: Choosing appropriate Chem ID

Jordan F
Prodigy 60 points
Part Number: BQ34Z100-R2
Other Parts Discussed in Thread: GPCCHEM

Tool/software:

Hello,

I've used the GPCCHEM tool to generate valid chemistries for our system. I'm a little confused on the results that we got. The cells we are using in our 16S1P pack are 5.04Ah cells with a maximum voltage of 4.2V for each, but the report from the chemistry tool is suggesting that the best match is an ID for a 3216mAh cell and in the description it has 4.3V listed. Does this sounds correct? Should I look for a different chemistry in the list that is closer to the 5040mAh, 4.2V cell we are actually using?

Also, I ran 2 different chemID cycles, one using a single cell and another using a whole pack. Each report generated a different chemistry list. Which report should I reference when choosing a chemistry to program?

Thanks,

Jordan

  • 0
    Prodigy 60 points

    Sorry, another question I forgot to ask in the original post.

    If we are scaling the current and voltage in the data flash parameters (current by 6, voltage by 2), do those values need to be scaled in the roomtemp_rel_dis_rel.csv log file that gets submitted?

  • 0
    TI__Mastermind 24895 points

    Hello Jordan,

    It's best to run the test on one cell and not the entire pack for the GPCCHEM tools. As long as the error % is less than 3% than you should be good to use is on your system.

    Thank you,
    Alan

  • 0 in reply to Alan Frias
    Prodigy 60 points

    Thanks for the reply Alan, was just confused at the sheer amount of options for possible ID's we could use and if those other descriptions should be used in the a decision.

    If we are scaling the current and voltage in the data flash parameters, do those values need to be scaled in the roomtemp_rel_dis_rel.csv log file that gets submitted to the GPCChem tool?

  • +1 in reply to Jordan F
    TI__Mastermind 24895 points

    Hello Jordan,

    Jordan F said:
    Thanks for the reply Alan, was just confused at the sheer amount of options for possible ID's we could use and if those other descriptions should be used in the a decision.

    -Your best option is to go with the chemID that has the lowest % error and labeled "Best chemical ID :", also to only test one cell only

    Jordan F said:
    we are scaling the current and voltage in the data flash parameters, do those values need to be scaled in the roomtemp_rel_dis_rel.csv log file that gets submitted to the GPCChem tool?

    -You shouldn't be scaling any values during the GPCCHEM process since you are just wanting to get the cell characteristic in it's purest form. Essentially what does your cell unscaled looks.

    Thank you,
    Alan

  • 0 in reply to Alan Frias
    Prodigy 60 points

    Thanks Alan, that clears things up. I appreciate it!