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Looking for a multi-cell NiCd/NiMh charger

Gregory Duperon
Expert 7460 points
Other Parts Discussed in Thread: BQ2000, BQ24600, BQ24703

Looking for a NiCd/NiMh intelligent charger (mostly NiMh) to charge 20 cells in series and 2 such packs in parallel (2S2P).

Input 28V/I max 3A

Do we have anything to meet these needs?

Thanks.

  • 0
    TI__Guru**** 166626 points

    Hi Greg,

    It appears that the NiMH charger will be charging at higher than the cell's 0.5C so termination by safety timer is not an option.

    The only dedicated NiMH battery charger we have is the BQ2000 family.  It can perform the recommended NiMH termination (dV/dt or dT/dt).  With additional level shifting components, it can operate up to 28V input.  

    The only battery chargers with 28V input capability are the BQ24600 standalone family and BQ24703 I2C controlled charger.  These are LiIon chargers and so cannot perform the recommended NiMH termination methods (dV/dt or dT/dt). 

    Is there a host processor and ADC that can take measurements to perform termination?

    Regards,

    Jeff

  • 0 in reply to Jeff F
    TI__Guru**** 166626 points

    Hi Greg,

    I haven't heard from you in over 7 days therefore I will close this thread.  Please feel free to re-open if not locked or post a new thread.

    Regards,

    Jeff