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Gas gauge for lead acid battery bank of 107 cells

user4601848
Prodigy 20 points
Other Parts Discussed in Thread: BQ34Z100-G1

Hello,

I\m trying to find a good solution for our Company. We have multiple battery systems around the country, batteries are almost always full and rarely discharged at all (except for discharge test of 100% at factory and 10% discharge after installed). I want to get the remaining runtime (percentage or time) remotely to the control room.

Battery banks are flooded lead acid, 200-350 Ah and voltage is <240 volts. Age of the batteries varies from 0.... 15 years.

Is it possible to calibrate BQ34Z100-G1 for our battery banks? And what is the output of the device?

Thank you in advance,

Jani

  • 0
    TI__Guru 73830 points
    Jani,
    I doubt that we will be able to provide good gauging for this application. The pack will need to undergo periodic learning with a charge - rest - discharge - rest cycle to update the Ra table and Qmax. The gauge is also not designed to be moved from battery to battery to measure the capacity and run time. While the battery can be changed, the gauge is designed to remain with that battery during its operating lifetime.

    Tom
  • 0 in reply to ThomasCosby
    Prodigy 20 points

    Hey,

    Would it be possible to calibrate it at factory test of 100 % discharge with 5h test + possibly other calibrations? We also do a 10 % discharge test after installation and 50 % discharge after few years.

    Of course we would use one gauge per battery bank and when we buy a new one battery bank we buy a new gauge if it works.

    And if this gauge won't work, then we are going to rely on coulomb counting, which is not good either.