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Originally Posted by Superemaxx89
That makes sense. The only thing I didn't understand is:
"This also makes charging easier because each group of cells in parallel (2p) will maintain voltage amongst themselves that can be monitored via a single set of taps (so 10 cells to tap total), whereas with 2 10s packs in parallel you have 20 cells to have taps on."
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Okay. Let's say you have 2 cells in parallel. That's 2p (I'm sure you know this). If these 2 cells are discharged, then between them they will maintain the same voltage (even if they are different capacities). For this 2p "group" (if you will), there is only one tap because the 2 cells in parallel will act electrically as one. But, if you have a 2s pack, you have 2 taps since the cells won't both maintain a certain voltage comparatively to each other. If you have two 2s packs put in parallel, you have 4 taps total since the parallel cells of one 2s pack won't maintain the same voltage as the cells of the other 2s pack. The
net voltages of the 2s packs will be equal at all times because of the parallel connection between them. So, the possibility is there that either during charge or discharge a cell in one of (or both of) the 2s packs could reach a dangerous level (less than 3v or greater than 4.20v).
Hope this explains it :018:. Let me know if you need more clarification, I could draw something uop that might make it a bit easier to understand.