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BQ34Z100, SOC does not act expectedly

Marek Novak
Prodigy 100 points
Other Parts Discussed in Thread: BQ34Z100

Good morning,
    I am using BQ34Z100 with ChemID = 0x6100 (NiMH battery pack). When I charge the pack, SOC is rising slowly accordingly to my calculations and everything seems to work well, but when I try to discharge the battery, the SOC value gets very quicky to 0percent even if I am only discharging the battery pack for several seconds.
May I be missing something in the configuration? Everything else seems to work well.
Please suggest a solution.

Thank you very much,
 Marek Novak 

  • 0
    Prodigy 100 points

    P.S.:
     I have also noticed this quick changing of SOC when charging the pack (it jumped from 48 to 100percent). Should I for example modify  Cell Min Delta V parameter or something like that?
    I have a 2000mAh pack and I was charging it by constant current of 230mA.

    Thank you for any help,

    Marek Novak 

  • 0 in reply to Marek Novak
    TI__Guru 73830 points

    Marek, 

    The bq34z100 will not work properly with NiMH cells. We are releasing the bq34z120, which has been optimized to work with these cells. Please register to the forum or provide contact information and we can make arrangements to get material for the z120 to you.

    Regards
    Tom

  • 0 in reply to ThomasCosby
    Prodigy 100 points

    Tom,

    I am already registered in TI forum community, my email is: ok2nmz ( at )  gmail ( dot ) com. I would be glad to receive more information about BQ34Z120. 

    Thank you,
    Regards,

    Marek