I have a little problem with a li-ion battery pack. I would like to measure each cells' voltage to avoid over-discharging them. In the image above you can see what I came up with. The thing is that it is basically impossible to measure G3 and G6 voltages separately.
The way I would do it is to measure GND to V1 for G1, then GND to G2 minus V1 for G2, etc. But what to do with G3 and G6?
Another idea would be to separate each bank of batteries and then somehow switch between them when one gets low, or, maybe put a large capacitor and constantly switch between banks... Hmm.
The max current I have to draw from these is ~2A.
My second idea: