This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

bq34z110EVM: basic questions when used to monitor a string of 12V Lead-Acid batteries

Other Parts Discussed in Thread: BQ34Z110

Hello all,

We will soon try the bq34z110EVM demo board and software, to have an overview of its capabilities when monitoring a string of 1 to 4 (or 3 apparantly due to a limitation in the demo board) lead-acid batteries.

I have some basic questions:

1) will it allow monitoring the "state of charge" and "state of health" of the individual batteries in the string?

If not, would doing so require a more complex circuit, for example with one bq34z110 IC per battery to be monitored?

2) Can the "battery conductance" be obtained from this platform (ideally the conductance of each battery in the string)?

3) if we select a "battery chemistry profile" from your database that matches the monitored batteries make/model and "flash that" to the demo board, will this system then make reasonnably accurate measurements, without going through learning/calibration cycles? (Hassle-free, out-of-the-box operation would be great!)

4) Can the demo board be modified to monitor a string a 4 lead-Acid batteries (60V max)?

Thank you!

  • Gilbert,

    The device will report SOC and SOH for the full stack, but it does not report to the cell level. I don't think that you will be able to stack these devices and configure them to monitor individual cells to gauge them.

    The device does learn the series resistance of the full stack. The resistance table can be read from the device.

    There is a chance that performance would be acceptable without the optimization cycle. but I think that you will find that you will need to run an optimization cycle.

    Yes, the device can support a string of four PbA batteries. You will set the # of series cells parameter to 24.

    Regards
    Tom