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BQ79656-Q1: Soc and SoH calculation for BMS

vikas chaudhary
Prodigy 150 points
Part Number: BQ79656-Q1
Other Parts Discussed in Thread: BQ79656EVM-021

Hi All,

I'm using BQ79656EVM-021 and BQ79600EVM-030 (Bridge evaluation board) 

BQ79656EVM-021 evaluation board is connected with  BQ79600EVM-030 on Daisy Chain protocol

I want to calculate SoC and SoH(State of health and state of charge) for a battery pack,

kindly guide me how to calculate Soc And SoH.

thanks

  • +1
    TI__Intellectual 1845 points

    Hello,

    SoC and SoH calculations are done by the host MCU. There is no "right" way to do it. Customers make their own algorithms based on cell voltage readings, temperature readings, and current readings. The BQ79656 gives the host these values, then you will have to develop your own algorithm for SOC and SOH.

    Thanks,

    Chase