Andje wrote:A couple more shots of its dominance.
Kelly vs an 18 fet lyens controller.
Andje wrote:Well, after two rounds of Makita packs from Slycayer, I have some excellent results, and so far I can't thank him enough.
600 cells purchased, 1$ a cell
534 good cells
354 Grade A cells <3.0v
180 Grade B cells <2.5v
Discharge curves show a good average capacity of 2500mah+, with most of the A cells over 2750 discharged at 2c from 4.15 to 3.3 resting.
I will almost certainly shoot for a round number, and will probably go with 40s 12p to use 480 cells which allows me to discard 5 full packs of B cells that are low on capacity. I just stacked 8 of the 5s2p blocks together and it's freaking small. 6 of them will fit easily with some creative racking!
My controller is in the mail. My motor might be mine today; i have class at noon and will find out then.
with 480 18650V at about 50g apiece including the packaging and such, should be about 24kg of cells alone. Then I will probably end up with at least a kilo of wire and solder on that. So maybe 25 kilo battery. Good thing I only weigh 130 lbs soaking wet! Should end up with 2953 watt hours capable of about 27000 watts at 10c. That would be epic. It would probably give me peaks of more then that, but by 30kw there is all ready about 3000w of heat in the freaking motor lol... My controller is "rated" at 300 amps peak, but I will probably keep it at 200 for the sake of it's longevity.
I don't even know where to begin . The 18650v's come in 5s2p, so at .5c the 2p should give me 3200 mah; mine are testing around that at .5c, and at 2 c they are showing between 2500 and 3000 mah; this is expected.
Your second comment is based on what? I know that I was putting 8500 watts into my hs30; I know that I was close to saturation since I couldn't go faster with more amps and through LFP's own experiments on his hs30. I know that my Kelly should be more efficient then the Infineon. I know that I'm using 18 gauge wire with high temp insulation to rewind the motor and increasing the copper fill. I know I'm running much heavier phase wires on this bike. Over all, I expect the bike to be able to handle 17kw of actual output power at the motor. This would mean that at say 85% efficiency I would need 20kw going in with about 3kw of heat. So, my original estimate was high, but there is a lot of leeway for the numbers to be off up or down. The motor will not cook in seconds at all, and I certainly wont see less then 50% efficiency to generate 15-20kw of heat. Only if I stalled it.
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