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bq34z110 equivalent replacement?

Electrons4me
Intellectual 530 points
Other Parts Discussed in Thread: BQ34Z110, BQ34Z100, BQ34Z100-G1

Hi Tom (Cosby),

I just noticed today that the bq34z110 is not recommended for new designs. This is very unfortunate since this seems to be a somewhat unique device. I need a battery gas gauge that can go as high a 670Ahr (preferably more) and measure 300A.

Question:

I'm told by TI that the bq34z100 is the suggested replacement. But it seems that device is limited to monitor batteries with very little total capacity (29Ahr) and little current (34A)? The 34z110 could do 650Ahr and 320A in x10 mode. Could you point me to a Gas Gauge that can do the same or better than the 34z110?

Also assuming I were using the 34Z110 and needed to monitor a battery that was 1000Ahr would there be a way to use multiple 34z110 to achieve this?

Thanks in advance!
SPA

  • 0
    Intellectual 530 points

    Hi Tom,

    Apologies, my oversight. I just came accross section 8.3.12 in the bq34z100 datasheet that actually mentions that the device supports a "scaled mode" from 1-10. However my question still stands: Is there a way for the bq34z100 to monitor a batterie bank beyond 10x 29Ahr? If not, does TI have a similar gauge that can do this? Maybe used in EV or large UPS applications.

    Thanks a million

    Best regards

    Electrons4me

  • 0 in reply to Electrons4me
    TI__Guru 73830 points
    The bq34z100-G1 replaced the bq34z110 to support PbA cells. We continue to manufacture the z110, but some new features ad bug fixes were implemented in the z100-G1. You will have to use scaling to support high capacity cells for either device and I have an application report that discusses this option. This report can be downloaded from the bq34z100-G1 website.