Quote:
Originally posted by BrianG
That brings up a quick question: How are parallel cells, like in 4s2p packs, charged without this same concern? The wires between each cell must be hooked to each parallel set right?
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That depends upon construction of the pack. If a pack is built into 4 groups (or blocks) of 2 cells in parallel, then all 4 groups are put into series, then there should not be any concern about charging. Basically, the 2 cells in parallel act as one (1) cell, and always maintain the same voltage between the 2. For this setup, only one balancer would be needed.
Taking 2 series packs and putting them in parallel requires more attention. The cells in one pack cannot balance themselves out with the cells of the other pack. The 2 packs together will maintain the same voltage, but that is different. For 2 packs to be put in parallel during charging, 2 balancers would be needed.
It is always best to get 2 2s2p packs and hook them in series than it is to buy 2 4s1p packs and hook them in parallel. It is much better to charge 2 packs in series than to charge 2 packs in parallel.
Quote:
Originally posted by Scott711
So the prefered method is a single 5s or 6s pack, right? It seems that would be simpler. What are the dimentions of a pack that size?
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The way you have a pack set up depends on the capacity of the cells. If you want 4000mah, and can only use 2000mah cells, then the ideal configuration would be to have a parallel and series pack, as described above.
The dimensions of a pack depend upon the brand and the capacity.