I think I may have soldered the balance leads in the wrong order. I went 1, 2, 12, ground. Started noticing smoke and flames right when I soldered ground (b13).
Only one resistor on the BMS is completely fried.
Anyways at this point I’m not sure whether to drop another $80 on the same BMS or just to skip BMS and charge and discharge manually. Kind of at a loss right now.
I remember when I hooked up my first bms I mistakenly soldered the balance leads backward. Me and I soldered 10th cell to the 1 cell slot on the bms. It almost caused fire.
They probably should have been. At least on the SuPower bms, it specifically sais that if you connect balance leads without batt + and - already connected, you’ll fry the bms.
A charge only BMS will fry if the balance leads are connected incorrectly.
I would get another $80 bms and start over but this time, take your time, don’t get in a hurry.
Make sure you got it right before connecting anything.
You have to double, triple check the wires before connecting to the bms, making sure voltages are correct on the balance leads, 3,7; 7,4; 11,1 aso. If you get this wrong, you’ll also fry the bms.
Make sure you check everything before connecting the bms next time!