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BQ35100: BQ35100 : mode EOS, error of the SOH

micou ludovic
Expert 1215 points
Part Number: BQ35100

Hello,

I test a BQ35100 with a 2S1P LLSH14. I have a sequence with 5h of relaxation then for 1h, I alternate between 200mA for 3s then 50mA for 1s. I see that the SOH discrease of 5% while I have a sequence but the capacity corresponds to 2.1% of the nominal capacity. The gauge is always active (GE in the GND).

I join the gg.csv and the file of the sequence.

Best regards

MicouSERCEL_2S2PLsh20.gg.csvPVS_2_2 decharge 25deg 2S1P LSH14.csv

  • 0
    TI__Genius 10370 points

    Micou,

    The bq35100 expects to be shutdown between learning pulses. It being always active is not within the correct procedure to use this device. Please follow the below procedure.

    1) GE High (turn on)

    2) Send gauge_start command

    3) Wait for [GA] bit to set

    4) Apply a load causing at least 100mV if battery voltage drop

    5) send gauge_stop command

    6) wait for [GDone] 

    7) read parameters 

    8) GE Low (disable, which clears RAM)

    The bq35100 will not run continuously

    Thanks,

    Eric Vos