Lifepo4 battery problem
 

hi guys!! i think i have problem with my lifepo4 48v 20ah battery.
first of all i bought it 1 year ago and due to work now i found time to convert my bike to ebike. so we start:
with a polymeter i count my battery but instead of 48v, shows 6v. is it normal? i dont think so.
i count each of 13 white wires also that goes from battery to bms (converter). and the volts were from 0.33v to 5.6v. is it normal too? thnx

In all the photos I could find, this battery pack has only the two red and black leads showing. Did you cut the battery apart, and are you measuring individual cells? The nominal voltage of a lithium ion battery cell is about 1.2 volts, so a 48v battery would be comprised of roughly 40 cells in series. Often lithium ion batteries are produced in subgroups of 3 cells as a single module, so the 48v battery might be 13 units of triple cells wired in series. (39 cells total).

In any case, you have to figure out the wiring so all the cells are in series to get the end to end voltage to 48v

I hope this helps because it's all I can offer based on then info provided. More details, might elicit a better answer from someone else.

I believe OP will get better replies in the e-bike forum, so I'm moving this there (from General Cycling).

--Juha, a Forum Mod