some time ago I was going through internet and looking for li-ion cells to make new battery for my EMTB
I was using lipos so far, but this is not a good source of power and I can clearly say that to EVERY PERSON that will try to use them to power high-drain builds: “this is crap”. They supposed to be 10C constant and 10Ah but reality was a bit different. Voltage sagging, puffing cells, unbalanced cells, etc.
I decided to go with li-ions and then I found THIS:
Volkswagen’s E-Up! electric car li-ion cells. 12 cells in a pack, configured as 6s2p, but that can be changed easily to 12s1p. 1 cell 3,7V, 25Ah, 5C constant, 10C peak, 147mm x 90mm x 25mm, +/-700grams each. They are quite big, but that is not a problem with mountainboard.
I got them loaded to 3,7V each and checked capacity. Here are the results when fully loaded:
Now I need BMS, proper charger and a good weather to try it out
What do you think about it? Did you try something like this before? Share your thoughts, suggestions, questions.