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Original question:

BQ27510-G3: At the end of discharge, TTE decrease slowly

BQ27510-G3: At the end of discharge, TTE decrease slowly

Stephane JUHEL
Intellectual 320 points
Part Number: BQ27510-G3

TTE decrease slowly.xlsx

  • 0
    TI__Guru* 76230 points
    Hi Stephane,
    What is the issue here? TTE will be dependent on the amount of current/power your application is drawing.
    thanks
    Onyx
  • 0 in reply to Onyx Ahiakwo
    Intellectual 320 points

    Hi Onyx,

    Please see the probleme :

    After performing the golden image, i check the SOC and the TTE on the product

    Every 10 sec, I read the TTE and SOC.

    During the discharge, the TTE is acceptable and follow a straight line during 8 hours. The TTE decrease every minute. It is OK

    But for the last 5 minutes the TTE decrease very slowly.

    TTE = 5 during 1min30sec

    TTE = 4 during 1min30sec

    TTE = 3 during 2min0sec

    TTE = 2 during 4min10sec

    TTE = 1 during 6min20sec

    Please find curve for the voltage, current, TTE and SOC during charge and discharge

    Please find the log during the last 5 minutes

    13/09/2018 20:03
    Temp Voltage FCC Current TTE_Coef_1 Cycles SOC
    315 3392 7062 -853 5 14 2                TTE = 5 during 1min30sec
    315 3392 7062 -853 5 14 2
    315 3391 7062 -853 5 14 2
    315 3391 7062 -853 5 14 2
    315 3390 7062 -853 5 14 1
    315 3390 7062 -853 5 14 1
    315 3390 7062 -853 5 14 1
    315 3390 7062 -853 5 14 1
    315 3390 7062 -854 5 14 1
    315 3390 7062 -854 4 14 1                TTE = 4 during 1min30sec
    315 3389 7062 -854 4 14 1
    315 3389 7062 -854 4 14 1
    315 3389 7062 -854 4 14 1
    315 3388 7062 -854 4 14 1
    315 3387 7062 -854 4 14 1
    315 3388 7062 -854 4 14 1
    315 3387 7062 -854 4 14 1
    315 3387 7062 -854 4 14 1
    315 3387 7062 -854 3 14 1                TTE = 3 during 2min0sec
    315 3386 7062 -854 3 14 1
    315 3386 7062 -855 3 14 1
    315 3386 7062 -855 3 14 1
    315 3385 7062 -855 3 14 1
    315 3385 7062 -855 3 14 1
    315 3384 7062 -855 3 14 1
    315 3384 7062 -855 3 14 1
    315 3384 7062 -855 3 14 1
    315 3383 7062 -855 3 14 1
    315 3383 7062 -855 3 14 1
    315 3382 7062 -855 3 14 1
    315 3382 7062 -855 2 14 1                TTE = 2 during 4min10sec
    315 3382 7062 -855 2 14 1
    315 3381 7062 -856 2 14 1
    315 3381 7062 -856 2 14 1
    315 3381 7062 -856 2 14 1
    315 3380 7062 -856 2 14 1
    315 3379 7062 -856 2 14 1
    315 3379 7062 -856 2 14 1
    315 3378 7062 -856 2 14 1
    315 3378 7062 -856 2 14 1
    315 3378 7062 -857 2 14 1
    315 3377 7062 -857 2 14 1
    315 3376 7062 -857 2 14 1
    315 3377 7062 -857 2 14 1
    315 3375 7062 -857 2 14 1
    315 3375 7062 -857 2 14 1
    315 3375 7062 -857 2 14 1
    315 3374 7062 -857 2 14 1
    315 3368 7062 -905 2 14 1
    315 3373 7062 -857 2 14 1
    315 3372 7062 -858 2 14 1
    315 3372 7062 -858 2 14 1
    315 3371 7062 -858 2 14 1
    315 3370 7062 -858 2 14 1
    315 3369 7062 -858 2 14 1
    315 3369 7062 -858 1 14 1                TTE = 1 during 6min20sec
    315 3369 7062 -859 1 14 1
    315 3368 7062 -858 1 14 1
    315 3367 7062 -859 1 14 1
    315 3366 7062 -859 1 14 1
    315 3366 7062 -899 1 14 1
    315 3365 7062 -860 1 14 1
    315 3364 7062 -860 1 14 1
    315 3363 7062 -860 1 14 1
    315 3362 7062 -861 1 14 1
    315 3361 7062 -861 1 14 1
    315 3361 7062 -861 1 14 1
    315 3359 7062 -861 1 14 1
    315 3358 7062 -861 1 14 1
    315 3357 7062 -861 1 14 1
    315 3357 7062 -861 1 14 1
    315 3356 7062 -862 1 14 1
    315 3355 7062 -862 1 14 1
    315 3354 7062 -863 1 14 1
    315 3353 7062 -863 1 14 1
    315 3352 7062 -863 1 14 1
    315 3351 7062 -863 1 14 1
    315 3350 7062 -864 1 14 1
    315 3348 7062 -864 1 14 1
    315 3347 7062 -864 1 14 1
    315 3346 7062 -864 1 14 1
    315 3345 7062 -865 1 14 1
    315 3344 7062 -864 1 14 1
    315 3342 7062 -865 1 14 1
    316 3341 7062 -865 1 14 1
    315 3340 7062 -866 1 14 1
    315 3338 7062 -867 1 14 1
    316 3337 7062 -867 1 14 1
    316 3336 7062 -868 1 14 1
    316 3334 7062 -867 1 14 1
    316 3333 7062 -868 1 14 1
    316 3332 7062 -868 1 14 1
    316 3330 7062 -869 1 14 1
    316 3330 7062 -859 0 14 1
    316 3328 7062 -860 0 14 1

    What are the parameters to adjust to have a TTE that decreases correctly if it is possible ?

    It is possible to do better ? If yes how ?

    I want that for the last 5 minutes, that the TTE change every minute .

    Thanks and Best Regard

    Stéphane

  • 0 in reply to Onyx Ahiakwo
    Intellectual 320 points
    I want that for the last 5 minutes, that the TTE change every minute .