So I have some left over parts and wanted to build my own foldable longboard sort of like the Linky (I think it was called) that was on Kick Starter.
I have two 6s ESCs, two 50mm 245KV motors, and some 3s Lipos. Anyways, I wanted to get away from Lipos, since I decided the cost savings isn’t really worth the risk anymore. I wanted to build a pack out of Lifepo4 batteries since that is what I gather is the safest to use. Also I thought it would be good to learn how to build a pack.
For a 6s setup, I believe the only cells that fit the bill are the A123 26650 as they have a high discharge rate. So here’s my questions:
If the nominal voltage is 3.3V which is lower than a Lipo, can I do 7S and will that still be safe for the 6s car ESC? It comes to roughly the same voltage as a 6s lipo. Never heard of anyone doing 7s which is why I ask!
Also since I have two motors and two escs I thought it would nice to have dual motor. Would I be able to get away with 6s2p? Or Maybe 6s3p? Not exactly sure how many amps 6s draws, but I know it’s quite a bit.
Lastly, I want to use a BMS for charging only (not discharging because I’m not sure there is even a ESC that could handle the amps for dual drive 6s and if there is I’m sure it costs a lot). It looks like they do make 7s BMS so I should be okay here.