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Original question:

BQ40Z50-R2: Learning Cycle Failing as per SLUA903 Instructions

BQ40Z50-R2: Failed learning cycle at second relax, VOK never clear

Riley Beck
Prodigy 30 points
Part Number: BQ40Z50-R2
Other Parts Discussed in Thread: GPCRA0

1Charge Relax.gg.csv2235.log.log

At the second relax the VOK bit is never cleared even after REST is set. Logs attached.

  • 0
    TI__Guru** 105760 points

    Hello Riley,

    I will take a look at this thread by the end of day.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    Prodigy 30 points

    Thankyou Wyatt.

    To Update, I made the assumption that The learning cycle failed due to a charge timeout error. I disabled this protection and ran the learning cycle again. I began the second relax (after full charge) before leaving for the day. When I came back the VOK bit had cleared but it doesn't appear a QMax update has occurred. The [QMax] flag is in the same state and the Update Status register is still 04.

    Log and data memory from after test attached

    3542.log.log
    112(3,4).gg.csv

  • +1 in reply to Riley Beck
    TI__Guru** 105760 points

    Hello Riley,

    I've been looking at the most recent log, I don't see any major issues with your testing. If you continue to perform the discharge are you able to get a Qmax update from the discharge portion of the learning cycle?

    If not then I would recommend using the GPCRA0 tool, it may be difficult to get the learning complete with LFP type chemistry so the tool may be easier.

    Sincerely,

    Wyatt Keller

  • 0 in reply to Wyatt Keller
    Prodigy 30 points

    Hi Wyatt,

    I have successfully generated a golden file using the GPCRA0 tool. After some testing it appears to have provided sufficient results for this stage of product development. 

    I will likely attempt a learning cycle at a later date, hopefully that will go better..

    Kind Regards,

    Riley Beck