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BQ78350: bq76940 and bq78350 combination

Eric
Prodigy 90 points
Part Number: BQ78350
Other Parts Discussed in Thread: BQ76940, , BQ76952, BQ34Z100, EV2400

Hi,

Is bq76940 and bq78350 a good combination as a BMS for battery pack application (up to 15 cells) ? Or do you have other recommendation?

Can we request sample code running on bq78350? Or bq78350 only allows user to program its register through SMBus and we need to have another MCU as a host to program bq78350?

If a host MCU is needed, can you recommend a MCU that can also support CANbus?

Thank you and best regards,

-Eric

  • 0
    TI__Expert 8245 points

    Hi Eric,

    The bq76940 and bq78350 is a good combination for up to 15s. However, this does use the older CEDV algorithm for gauging though. If you wanted to upgrade to the newer Impedance Track algorithm, I would recommend the bq34z100 gauge with the bq76952 monitor.

    Unfortunately we do not provide sample code but the bq78350 does come with a firmware image already on the device. You can use an EV2400 to communicate with the gauge and adjust parameters prior to having an MCU.

    You will eventually need a host MCU to be able to read SOC and other info from the gauge and be able to use this info in your system. I unfortunately can not make an official recommendation on an MCU.

    Thanks and let me know if you have any further questions,

    Jackson