If you had a 32S BMS that instead of 32 50mA discharge lanes, it had 10 500mA discharge lanes that could be switched between groups as needed then it would balance a lot faster, even if some of the groups had to wait for a chance to discharge.ElectricGod wrote: ↑Aug 09, 2018 2:34 pmExcept that lots of people don't want an 8S BMS. 16S is pushing the lower limit for me. Most of my builds are 20S and I'm moving (slowly) forward on a 32S build.lionman wrote: ↑Aug 09, 2018 1:22 amThey should design the BMS with fewer, but more powerful discharge lanes.
Balancing performance would be a lot better in most situations if they had say 1/3 the number of lanes with 3x the discharge rating.
Just need some circuitry that ensures that 2 groups never connected to the same discharge lane, which some clever engineer could come up with.
What I wish is that BMS balancing had something to do with the current handling. 50mA balancing is pretty common despite the BMS being capable of 20 amps or 160 amps.
Balancing a 64 Ah pack at 50mA will take forever. It's fine for like 10 Ah, but for larger packs, it's just not enough balancing current. My band-aide is setting the balance start voltage low so that balancing gets a chance to do something on larger packs. The other option is to use multiple BMS's...which I also do.
Another option could be to use the high groups to charge a capacitor and then discharge the capacitor into the low groups. The could cycle very quickly between low and high groups bringing them to balance faster than just burning off energy from the high groups as heat.