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is there a gauge I can use for Li/MNO2?

Dan-o
Intellectual 895 points
Other Parts Discussed in Thread: BQ27510-G2, BQ27510, BQ27210

I'm using bq27510-G2 on another project with a lithium ion battery. Is it possible to use one of these gauges with a CR123? Its a primary Li/MNO2 battery. I'm not completely sure how the learning process / chemistry selection works. I suppose if I went through a cycle with the CR123 and it was close enough to a Li-ion that might work. I doubt that will be the case however because CR123s have OCV around 3V and cutoff around 2V.

Any ideas?

  • 0
    TI__Genius 14985 points

    Unfortunately there really isn't any good way at the moment to use an Impedance Track gauge like the bq27510 with a primary cell.  There are no chemIDs to use and the characteristics of primary cells don't make them friendly to the current implementation of IT.  Your best bet for a primary cell gauge is coulomb counting and voltage thresholds using a bqJunior like bq27210 per SLUA367: http://www.ti.com/litv/pdf/slua367