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BQ34Z100-G1: Is it possible to calcurate battery impedance from Ra table?

K.Yaita
Guru 29720 points
Part Number: BQ34Z100-G1

Hi Team,

I would like to ask two questions as the following.
1)
Is it possible to calcurate battery impedance from Ra table?
Is there any calcuration formula?

2)
My customer mistaked the connection SRP and SRN in reverse.
Is there any workaround without revising their board?

Best Regards,
Yaita

  • 0
    TI__Guru** 105770 points

    Hello Yaita-san,

    Yes the the table is in mOhm correlating to different DOD points. You can check SLUA450 for more information.

    I'm not aware of a solution for that, the only solution would be hardware.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    Guru 29720 points

    Hi Wyatt-san,

    Thank you for your kind support.
    I would like to ask an additional question.

    >Yes the the table is in mOhm correlating to different DOD points. You can check SLUA450 for more information.
    I believe Ra table include not only cell impedance of battery but also parasitic impedance between the device and the battery.
    Is my understanding correct?

    Best Regards,
    Yaita

  • 0 in reply to K.Yaita
    TI__Guru** 105770 points

    Hello Yaita-san,

    Yes that's correct, it's the total impedance of the pack including the interconnect or other sources.

    Sincerely,

    Wyatt Keller