52v eBike 20Ah 2170 cells
16,412
Published 2023-03-05
PCB files = www.pcbway.com/project/shareproject/52v_2170cell_e…
PCB Dividers = www.pcbway.com/project/shareproject/52v_2170cell_e…
BMS = amzn.to/3JdV6w4
Balace cable = s.click.aliexpress.com/e/_DFaTZOz
Nickel Strip = amzn.to/3mw9ff6
Kapton tape = amzn.to/3F1pcAv
Xt60 pigtail = amzn.to/3Ygt3AA
Screw terminals = amzn.to/3KWd0Vu
Recommended Charger = amzn.to/3kST3nN
2.1mm pigtail = amzn.to/41KGTy5
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All Comments (21)
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I would call that a BMS fail, and not your design otherwise. Somebody suggested water cooling the BMS, which is a good idea maybe if you want to go with those. Thanks, Jehu, I'm glad you're doing what you're doing!
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"Your gonna need a bigger BMS" - Chief Brody, Jaws
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I would say yes this BMS passed the test but I would definitely implement some kind of cooling or consider putting the BMS further away from the cells or add better heat protection between the BMS and the cells.
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this looks pretty sweet , I hope I get to build a battery on the inexpensive I'm about to build my own recumbent e trike.
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Gonna have to get some daly's on there man, surely those cells can handle a continuous load much higher than that and a LOT of ebike guys want more than 2kw sustained. (especially the sur ron guys that would love these)
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I think it was a very good test and you chose the right connectors. Looks like it preforms very well. Go and try it on an e-bike 👍
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It's a Chinese BMS. If it says 45 amps discharge current, they mean 20 amps max. This is alway a translation issue apparently. ;-)
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I have found over sizing the bms is necessary double them to be safe, use fuses whenever possible.
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"it'll be open source just like all my projects" gigachad
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Might have to try one out on my 1500watt ebike👍👍👍👍
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I use Daly bms. U can use thermal paste and fin block coolers on the bms. I also pot the bms in Ge silicone ii inside.
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That was a continuous full load test, you will never do that in an ebike. I call this a win. I've got 3 bikes (all different) and most of the time I am below 50% draw. I think if you ran the motor for that long at full throttle it would burn up first.
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Cells should never get hotter than 55-60 degrees C. I wouldn't have kept that inside with 100 degrees C on the package!
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Elevate the BMS slightly to let air flow under it.
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try the bms from Daly, over 80a they have cooling system on the 52v model
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After long time 💖🙌 sunny Bukhari from badin Sindh Pakistan ❤️
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130C is like a lot. But it will never reach that temperature in a e-bike. Fir me its a perfect size and perfect specs. 👍
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Could you do a video on how to make a 12 v battery for a tesla model y replacement?
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M50L are good for LOW CURRENT applications. 7 amps per parallel group, be advised! These cells are from 2018
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Would love this in a 72v for my Phat scooter. Possibly a 20ah or 40ah.
