While not as good as a direct measurement, I just pulled out a spare BCM, and measured 1 meg between each of the taps(VHB6 to VHB5)( VHB7 to VHB
.
This is likely the load on the ~ 15V -12 cell subpacks between the taps. That is about 15 uA, so a 10K divider (100K total) should work just fine.
The 180 ohm series resistors would be virtually invisible as far as any effect on the measured voltage.
