bike4life
Well-Known Member
It works... its 24 series of 22650 lifepo4... Right now i tested the ebike at 78 volts pack voltage and it only went 30mph... Each bank of cells is 39 volts and i have 2, one on left. other on right. 39 x 2 = 78. Slight dissapointment... I have a 48v / 72v controller... Maybe either the controller is dumb and messing up... I think maybe the full charge voltage on these sells is 44 volts, so 44 x 2 = 88 volts... I am currently charging the banks with my server psu, 3 in series, to 36 volts, running through boost converter to step up to 44v (there are 4 psu in the picture but the last one isnt plugged into anything or hooked up. My BMS system is clip on with alligator clips as i was to cheap to buy 2 bms, so just clip on one and then unclip and clip on battery number 2...
I hope it goes 45 mph... It really should considering the high voltage i am running... I also tested the battery against some kiln wire and it was able to put out 20amps with my clamp meter, so 44 v 20 = 880 watts. I am sure if i did a lower resistor it would have put out ever more amps... These cells can put out like 10 C, so i dont really know why its going so slow...
cell spec sheet:
each battery bank was 55 dollars from batteryhookup.
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