Starting with electronics, (sadly 100/250 was released the day I got these, 20S would’ve be sweet)
Battery currently planned to be 16s12p Sony VTC6 cells, planning on making a plastic enclosure similar to lift’s so I can use it as a general 16s / 360A battery.
Finding a BMS to handle discharge was difficult. I ended up buying a tiny bms because it supports an external relay + current sensor. Unfortunately these high amperage relays are ~1LB, so my new plan is use the BMS charge only and use the vesc’s e-switch as a “relay.” I think this should work great and the vesc uses about as much power as the BMS in low power mode.
I got some recycled supercaps to power my spot welder, but their current output is only 900A, so I think I’ll have to add more caps to spot weld copper strips to the batteries.