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BQ34Z100-G1: What are typical and max error at -40C using this part?

David C
Expert 3350 points
Part Number: BQ34Z100-G1

Hello,

Just looking for an estimate. It states 1% in the datasheet but the -40C is the edge of the boundary.

Regards,

David

  • 0
    TI__Mastermind 25955 points
    Hi David,

    For the MaxError parameter, MaxError() (0x03) will return the expected margin of error from 1%-100%. The value is updated based upon events. It is incremented by 0.05% for every increment of CC (CycleCount) after the last Qmax update.

    A Full reset will set MaxError() to 100%. Other events such as Qmax updates, RA table updates, and more will impact the value of MaxError().

    For more information, please refer to Section 7.3.1.4. of the Datasheet.

    If you were referring to another max error, please indicate which figure/portion of the device you are referring to. Thanks!

    Sincerely,
    Bryan Kahler
  • 0 in reply to Bryan Kahler
    TI__Expert 3350 points
    Hey Brian,

    I was looking more for an estimate of Accuratcy of the Gauge at temperatures of -40C.
    Such a % error of the SOC.

    Regards,
    David
  • 0 in reply to David C
    TI__Mastermind 34665 points

    Hi David,

    The accuracy will depend on the gauging algorithm and the chem ID. IT gauge algorithm has 1% accuracy, but most of our chem IDs are for 0C to 50C. For -40C operation there's some more work needed to improve the accuracy called an RbTweak.

    http://www.ti.com/tool/GPCRB

  • 0 in reply to Damian Lewis
    TI__Mastermind 25955 points
    Hi David,

    If the above response helped resolve your question, please click on the 'This Resolved my Issue' button below to improve the find-ability of this response for others that may have the same issue. Thanks!

    Sincerely,
    Bryan Kahler