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BQ34Z100-G1: Does battery balancing confuse 'Impedance Track™' fuel gauges, such as the bq34z100-G1? (using with BQ769x0)

Senthil Seveelavanan18
Prodigy 160 points
Part Number: BQ34Z100-G1
Other Parts Discussed in Thread: BQ76930, , BQ78350-R1, BQ78350

Im interested using a BQ76930, together with a fual gauge such as a bq34z100-G1. 

What potential incompatibilities could there be? Should these ICs work together?

I was wondering if balancing confuses the calculations made by the bq34z100-G1?? If this is indeed a problem, how is this mitigated?

  • 0
    TI__Mastermind 42535 points
    Such a solution wouldn't be viable. Your bq769x0 contains a CEDV gauge. Yes, balancing has the potential to disrupt IT if it's not done in the same gauge. Also, I wouldn't advise pairing a CEDV gauge and and IT gauge.
  • 0 in reply to Batt
    Prodigy 160 points

    OK I'm confused. 

    I wasn't aware the bq769x0 contained a gauge, I thought only it was mostly contained ADCs for voltage, current, temperature. I searched the datasheet for the term "CEDV" and couldn't find it. Also I have skimmed through the datasheet and not seen any hint of there being a gauge. I was under the impression than the bq769x0 needs to paired with a dedicated gauge, such as the "BQ78350-R1 - CEDV Li-Ion Gas Gauge and Battery Management Controller"??

  • 0 in reply to Senthil Seveelavanan18
    TI__Mastermind 42535 points
    It has a companion controller IC, the bq78350 that is is paired with. That is the best gauge to use with this AFE.