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TIDA-00817 16-Channel Active Cell Balance algorithm

Massimo Tucci
Prodigy 180 points
Other Parts Discussed in Thread: BQ76PL455A-Q1

I'm considering to develop an active balancing as described in appnote. There is a good documentation, but I can not find references regarding the balancing algorithms and their performance. Also I understand that to make a stand alone BMS is required a micro to support. It's correct?

  • 0
    TI__Intellectual 2795 points

    Hi Massimo,

    The balancing algorithm, along with the balance current level required would depend on many factors, including capacity, load/charge current, quality of cells and/or chemistry. Usually, the simple requirement of having the cells balanced within as few charge cycles as possible will lead a customer to choose an active balancing solution.

    The bq76PL455A-Q1 monitor and protector which is the basis for the TIDA-00817 is an event-driven device, meaning that it only does things based on a command from the host controller. Typically this would be a single MCU at the pack level, which also does SoC/SoH calculation, main contactor and pre-charge control, pack voltage and current measurement and insulation monitoring. A TMS570-based processor is a good choice for this function, and is what has been used in our example code.

    Regards,

    Stephen