want to build said:
Balmorhea said:
The moral of the story, for me, is that you don’t have to use flashlight batteries to power your e-bike. Somehow we knew this 25 years ago, but many of us have forgotten.
im not sure to understand what you mean by that that you don’t have to use flashlight batteries to power your e-bike.
Those 18650 cells are scaled correctly for a pocket flashlight, a vape pen, or a cell phone power bank. Not for a bike.
Get used to the idea that your pack’s performance is limited not by the cells, but by the nickel strips. If you need more than 5A continuous current per cell, you have to add more cells until you get there. Or you have to double up the nickel strips, with the understanding that more cell welding equals more cell damage.
One of the packs I use, which I built, is 25Ah cells in a 13S 1P arrangement. Those cells are rated for a maximum 500A discharge. The other pack I use, which I also built, is 20Ah cells in a 12S 1P arrangement. They’re rated for a maximum 180A discharge. (I only use 35A controllers with either one.) Anyway, they’d be crippled by nickel strip interconnects if they had them.
EVs can benefit from EV batteries. Give them a try, if you can.