Ok, I shouldn't say cheap. I want good cells with 3c or better rating that I can charge at least at 1c if not faster. I've purchased four battery powered Razor dirt bikes for my sons for christmas (all used) and want to increase the ride time and reduce a 12hr lead acid battery charge time to 1 hour lithium charge time.
I've just ordered a 36v 15Ah pack from Aliexpress.
https://www.aliexpress.com/item/US-EU-No-Tax-DIY-lithium-18650-battery-pack-15AH-36V-Electric-Bike-battery-for-36V/32757165516.html
What I don't understand is how it can use the name brand cells stated yet it only has about a 1C discharge rating and can only be charged up to 5A which is 1/3 of 1C?
So I'm thinking of building my own pack for 36v 15Ah. This would be 10s 5p (50cells)with 3000mah cells or 10s4p (40cells)with 3500mah cells. I'd love to do this for $150 or less but am finding 18650 cells with 3c discharge rating or better that are $4 plus. Where can I access cells of this quality for $2 each? I noticed a seller here on endless sphere selling cells with tabs removed in bulk for cheap. Good deal or likely used cells?
https://endless-sphere.com/forums/viewtopic.php?f=31&t=61608
ANY recommendation would be helpful. I'm new to E biking but have long used li-po packs for high powered (12s lipo 5,000+watt) electric ducted fan rc jets so somewhat familiar with batteries and chemistry.
thanks in advance,
Carl
I've just ordered a 36v 15Ah pack from Aliexpress.
https://www.aliexpress.com/item/US-EU-No-Tax-DIY-lithium-18650-battery-pack-15AH-36V-Electric-Bike-battery-for-36V/32757165516.html
What I don't understand is how it can use the name brand cells stated yet it only has about a 1C discharge rating and can only be charged up to 5A which is 1/3 of 1C?
So I'm thinking of building my own pack for 36v 15Ah. This would be 10s 5p (50cells)with 3000mah cells or 10s4p (40cells)with 3500mah cells. I'd love to do this for $150 or less but am finding 18650 cells with 3c discharge rating or better that are $4 plus. Where can I access cells of this quality for $2 each? I noticed a seller here on endless sphere selling cells with tabs removed in bulk for cheap. Good deal or likely used cells?
https://endless-sphere.com/forums/viewtopic.php?f=31&t=61608
ANY recommendation would be helpful. I'm new to E biking but have long used li-po packs for high powered (12s lipo 5,000+watt) electric ducted fan rc jets so somewhat familiar with batteries and chemistry.
thanks in advance,
Carl