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BQ40Z50-R1: RSOC has sharp knee from 100%, not decreased gradually

J.C Chen
Expert 1285 points
Part Number: BQ40Z50-R1
Other Parts Discussed in Thread: GPCRB

HI, TI team

    I used the bq40z50r1 in the project.  The pack is discharged under about 7degC. However the RSOC have sharp knee from 10%, not decreased gradually. How could i to optimize the parameters in data flash?

0.8C.xlsx

1) I have update the ra table by GPC calculation. However, i have not do a successful learning cycle in the typical pack.

     Is it a problem to this issue?

2) The attached is the GPC report. Please help to check whether i need to optimize the parameters?

    ATL396686-report.zip 

3） During the low temperature optimization, the discharge rate is 0.5C. However, i need to do the 0.8C discharging test.

        So is it acceptable?

BR 

J.C Chen

  • 0
    TI__Intellectual 1735 points

    • If you haven't done a learning cycle, that could be a problem to cause some issues
    • To optimize low temp parameters, discharge the battery at system typical high rate until the minimal voltage, so you can choose higher currents for GPCRB