flippy said:sorry but that is utter dumb advice. a 100Ah lifepo4 battery weighs in at 100+lbs. no to mention that for that price the quality cannot be anything else then shit.
recommending lifepo on a bike is just flat out bad advice. especailly with a $15 bms.
flippy said:recommending lifepo on a bike is just flat out bad advice. especailly with a $15 bms.
gobi said:100ah 3.7v Lipo pouch cell looks very attractive being 1/10th weight of the LIFEPO4 cells.
10000mah 25C:10564155,Dimensions is Thickness x Width x Length =10.5x64x155mm,weight:196g
Chalo said:flippy said:recommending lifepo on a bike is just flat out bad advice. especailly with a $15 bms.
The OP's question isn't about a bike; it's a trailer.
I used a briefcase-sized LiFePO4 pack on my cargo bike for a while (made of old low performing cells), and it was fine. It gave me more range than my NMC prismatic pack and didn't take up that much more space (though it was heavier). That LiFePO4 pack had a cheap generic BMS that worked great, and I inspected cell voltages often to be certain (because of the old cells).
The same pack is still doing work for Austin Bike Zoo now, and it's still fine. I don't know what rationale you base your assertions on. Maybe you assume the use of a bike that isn't competent to carry weight?
flippy said:Chalo said:I don't know what rationale you base your assertions on. Maybe you assume the use of a bike that isn't competent to carry weight?
120lbs on lifepo versus 40-ish lbs on 18650's is QUITE the difference, especially on a bike, trailer or not. its a LOT of dead weight to be dragging along. even ignoring the difference in volume wich is also very much at a premium.
lifepo4 has its place. just not on bikes.
Chalo said:Anyway, making a multi-kWh pack out of vape pen cells is silly.
flippy said:Chalo said:Anyway, making a multi-kWh pack out of vape pen cells is silly.
tell that to tesla.
you are being dumb. they are not even vape cells.
no, you picked and choose the cells that to fit your narrative and you failed.Chalo said:Okay, flashlight cells. Whatever. Something you need 400 to 600 of to make the OP's desired pack.
And sure, you can compare a limited power, limited life portable device cell to something that was intended for stationary applications, but I already did the math for you using cells that compare more relevantly to each other.
flippy said:no, you picked and choose the cells that to fit your narrative and you failed.Chalo said:I already did the math for you using cells that compare more relevantly to each other.
and there are 50+ cells in a regular ebike battery. they seem to work just fine on a bike. even ignoring the 8000+ in a tesla....
gobi said:100ah 3.7v Lipo pouch cell looks very attractive being 1/10th weight of the LIFEPO4 cells.
10000mah 25C:10564155,Dimensions is Thickness x Width x Length =10.5x64x155mm,weight:196g
The OP's question isn't about a bike; it's a trailer.