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BQ35100: Scaled R

LOIC REBOUSSIN
Expert 1620 points
Part Number: BQ35100

Hi All,

There are no description about Scaled impedance named "Scaled R" parameter, can you provide this description corresponding ?

What is the functionality difference "Scaled R" and "Measured Z" parameter ?

BR,

Loïc

  • 0
    TI__Guru 61246 points

    The gauge has a built in impedance data for a reference cell that has a different absolute impedance than the actual cell (e.g. different capacity cells with similar/same chemistry will have the same relative impedance profile but different absolute impedance as a function of DOD).

    The gauging algorithm will calculate a scaling factor when a fully charged fresh cell is connected by measuring impedance and comparing that to the reference impedance that is stored inside the gauge.

  • 0 in reply to Dominik Hartl11
    Expert 1620 points

    Doninik,

    When you talk about the reference impedance that is stored inside the gauge, do you refer to chemistry  programmed in the gauge ?

    So the scaled R is completed by the Gauge, we don't must write it ?

    What is the difference bettween ScaledR(): 0x16/0x17 and MeasuredZ(): 0x22/0x23 value ?

    BR,

    Loïc

  • 0 in reply to LOIC REBOUSSIN
    TI__Guru 61246 points

    Yes, the reference impedance is part of the chemistry data.

    >So the scaled R is completed by the Gauge, we don't must write it ?

    No, you don't have to write it.

    >What is the difference bettween ScaledR(): 0x16/0x17 and MeasuredZ(): 0x22/0x23 value ?

    The difference is that one is adjusted by the scaling factor as determined by the gauge and the other one is the actual measured resistance.