yeah but you get the distinction? with the vesc seeing individual cell voltages it can “detect the issue” much sooner ie at it’s low voltage cutoff start(/cell) value. so it can slow down gradually as we’re used to.
Only using the binary signal from the BMS means detecting the moment undervoltage (or other fault) occurs. at which point to signal back to the rider you have to do something more dramatic. can still be smoother than just cutting off though.
Parallel group is out of balance because a cell went bad, run it down till it dies before opening it and check all the group voltages, then charge it (don’t need the board back together just make sure nothing shorts out and note CF is conductive) and verify everything is balanced again, if it is then either the cell is toast or it’s connection is
It could also be broken welds leading to an imbalanced group. The group or groups in question would charge/discharge more quickly than the other groups causing the bms to shut down the charge when the group(s) reach to overvoltage cuttoff.
Step 1. Plug the spot welder into a standard 120v outlet.
Step 2. Wait for voltage display to reach 5.3v. When you initially power up the spot welder it will take about 15 minutes to fully charge the capacitors. After the initial charge the power supply will normally keep up with your spot welding speed.
Yeah, it’s not at all about the money because I literally bought those 10 cells cheap just to have as tests or to do some random side project with but still, claiming they are tested and never discharged… Can I trust anything they say now?
The 50 new cells that I’m actually gonna use were all good though