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BQ27441-G1: Resimulation after soft reset

Part Number: BQ27441-G1

After soft reset the device does a resimulation and updates StateOfCharge() and StateOfChargeUnfiltered(), mention in section 4.1.17.  When these are updated do they use the values it has learned on the pack or does it start over from a blank slate.

The scenario i'm interested in is the device has the necessary fields updated and has been charged and discharged multiple times learning the attached pack.  If the CONFIG UPDATE process is then done again but the same values are written, it exits with a SOFT RESET. Does this reset the already learned values of the pack or does the resimulation caused by the SOFT RESET use the learned values?

  • Matt,

    It will update based on the values currently stored in the device. So if you are overwriting these values they will use the over written values.

    Thanks,

    Eric Vos

  • The only values we are configuring are the one discribed in the quick start guide, Design Capacity, Design Energy, Terminate Voltage, and Taper rate.  Its my understanding that over charge cycles it has other values that it keeps track of like StateOf Charge, MaxLoadCurrent, Remaining Capacity, and the R_a table, etc.  Do these values get updated as if a new pack was inserted or will these persist over a  soft reset

  • A soft reset won't change the learned values (Ra and most of the contents in the State class).

    It will restart the gauging algorithm and recalculate gauging state and results. It will use the learned data for this.