dnmun wrote:you will have to post up a picture of your battery pack. i have never seen lipo packs assembled with the cells wired in parallel.
Cannot tell you about his pack.. but all my higher power lipos are parallel then serial. My thunersky 6000mah 11.1v are 3 parallel 2000mah cell pack, then put in series to get 11.1v.
I would expect any serious mah pack is that way since its easier to solder the tabs sections then add wires to make serial than it is to add wires to parallizes packs, then add more wires to parallelize them. Here is a shot of one of them you can see the vertical stacking of cells (parallel soldered at the tabs) and the the length is the series.
Its not too uncommon to have serial serial parallel, e.g. 4 packs of 11.1vs in series where the pack are themselves 3S of sub pack of 3p.
If you look at the RC lipo wiring site (http://scriptasylum.com/rc_speed/lipo.html
) that is what they think is the normal configuration series of parallel. There are dozens of packs on hobby king that are 3s2p.
That being said I'm looking at building a 12ah 7S pack that is a serial connection of two 2 packs in parallel of 3sx3p *6ah) lipo and a 1Sx6p pack that I'm building out of cells groups pulled from other packs where one of the serial elements died. No standard name for this kind of thing and not sure exactly how I'll charge it other thank taking them out of the bike to balance. After some testing I expect I'll get a BMS and build an adapter so i can bulk charge it. I know this is a bit weird, but I'm doing this as a stop gap.. and I want to keep my thundersky for UAV flying (which is why I bought them) and my controller will not work at >30V and the sag from 6S was too much so I wanted 7s and had the cells to make it.
This thread was helpful as I did not think about parallelizing across the packs (I've only done parallel cells).. but can see that if they are already balanced and close it would work to keep them in balance and that will make it easy to do a BMS while keeping the packs usable for UAVs;-)