999zip999
100 TW
Get the book.
john61ct said:K2 cells
good company
y'all think their LFP cells good as A123?
https://batteryhookup.com/products/20-k2-26650-lfp26650ev-3200mah-lifepo4-batteries-new
Please correct me if I'm wrong. Nominal 3.7Vpc, 6S = 22.2VHillhater said:Get 2 of these.. For <$400. (Or 3 if you really want 72v)
https://hobbyking.com/en_us/turnigy-high-capacity-battery-20000mah-6s-12c-drone-lipo-pack-xt90.html
Series connect ..easy.
< 5kg, 48v , same capacity as your current pack , but 3kW no problem
john61ct said:Please correct me if I'm wrong. Nominal 3.7Vpc, 6S = 22.2VHillhater said:Get 2 of these.. For <$400. (Or 3 if you really want 72v)
https://hobbyking.com/en_us/turnigy-high-capacity-battery-20000mah-6s-12c-drone-lipo-pack-xt90.html
Series connect ..easy.
< 5kg, 48v , same capacity as your current pack , but 3kW no problem
12S only gets to 44.4, I figure need 14S for 48V ?
And nominal 72V would usually mean charging @88+V, so 21S ?
you are correct !john61ct said:Please correct me if I'm wrong. Nominal 3.7Vpc, 6S = 22.2V
12S only gets to 44.4, I figure need 14S for 48V ?
And nominal 72V would usually mean charging @88+V, so 21S ?
But if that is LFP, isn't it a very low energy density, takes more space and weight to carry the same Wh?999zip999 said:My A123 20ah pouch can put out 100amp. In real life and live long life . Can you fit the size ? Hold the weight.
dogman dan said:Only lipo will put out 3000w at 48v. 10 ah at most will fit. So you need something able to put out 20c in reality. which means the way they lie about the c rate at hobby king. you need about 60c type or better.
Dont forget , RC lipo also has generally a much higher "C" rate.. (Power density =discharge power)..than other lithium batteries,john61ct said:.
RC LiPo just means no BMS cutout, and light as possible, which means thinner, weaker casing more fragile, like pouches as opposed to bulkier / heavier (and more robust) prismatic casing.