Okay all, i have a few questions for the larger scale electric guys. What i'm planning on doing is making a 6s2p pack out of 4 3s1p 2200mah lipo packs. I'd like to charge them all at once, and keep them balanced. What i was thinking about doing is wiring all the same voltage taps in parallel, and using a blinky balancer. so in the end i would have a seven output tap with a (0v, 3.7v, 7.4v, 11.1v, 14.8v, 18.4v, 22.2v) My question is, would the cells wired in parallel using the taps self balance well enough during discharge to not overdrain one over the other. I'm pretty sure during charging (0.5-1.0C) they would. Attached is a schematic. Let me know what you think[img][/img]

Your technique is not safe due to the different node wiring scheme and discharge path.

Try reading this article for additional information.

[link=http://www.fmadirect.com/new_applications/SuperPacks/Index.htm]Building Safe Super Packs[/link]

Not sure i understand, it seems i'm essentially doing the same thing as described in the "super pack" article. In the article, they are putting 5 cells in parallel (i'm using 2) and then cells in series (i'm using 6). I'm pretty much putting two 6s1p packs in parallel, with taps inbetween to aid in cell balancing during charge and discharge. I did leave out one wire though between the two sets of series packs on each side for high current discharge. All the wires in the middle going to the taps would be 20 gauge or the typical tap gauge, and the ones running on the outside (the high current discharge wires) would be appropriately sized.

I build my own packs all the time. The important thing is to always do you parralells FIRST, then do you series. Also provide for some type of balancing during charging. The only time i had problems is when I took 3s1p packs & used them with a series connector & then tried to charge them together without a balancer.