I have completed my first build. It was defintely meant as a first exploration, using an old skateboard and trying to keep costs down as much as possible. Furthermore I wanted to expirement a bit with 3D printing and electronics by making my own remote and battery enclosure. The board uses a Maytech vesc and 5065 236kv motor rated for 10s 60a max, powered by two 4s 5000mah lipos (25-35c) in series. I travel by train a lot and want to keep my board portable, so no need for crazy range and speed. I have done no exact measurements but range should be a little over 10km now, and due to the small board I have not actually reached top speed yet (one ebiker followed me once and told me he measured 30km/h but not too sure about that).
Time for upgrades! I plan to make a longboard with a few cm more length and carying handle. But more importantly I received a “broken” ebike battery and scavenged the cells (supposedly something wrong with electronics and hardly used yet). I am not a big fan of opening my enclosure every time and charging the lipos seperately, and want to build a proper pack with a BMS. I am still a poor student so trying to stay cheap!
TLDR: My questions:
- The cells I have at hand are Panasonic NCR18650PF 2900mAh - 10A. I have 40 of these. Is it possible to find a cell arangement that achieves similar results to the lipo batteries without becoming more bulky and heavy? Or would it then be better to stick with lipo and add a BMS?
- Would it be bad to get a cheap BMS and avoid discharging through the BMS? And can the charger be a cheap chinese 2A?
Please let me know if I left out information that should be taken into account for this decision!