Note, new Spin Ninebot Max scooters (since maybe late 2020) have a new BMS that will cut off the motor after a few seconds of riding.
It's discussed on another website:
https://www.scooterhacking.org/forum/vi ... .php?t=443
I have a scooter like this. I previously didn't flash the BMS since it wasn't needed. But I'll try flashing the BMS now and update you.
Only issue I have is that when I accelerate it goes well, good acceleration, good speed, but then suddenly stops after few seconds. I can hear a little "pop" from the battery/BMS (around that area). It does not stop when I accelerate without being on it. It only stops when I am on it.
I tried Eco, D and S and the same problem appears.
The problem is still present after tweaking with a Flashing Custom Firmware and XiaoFlasher..
Any idea or anyone already faced or read this issue on the forum - i searched but could not find similar issue?
reply:
I know now exactly what you were talking about. Seems like this newest Max firmware 8.1.8 has an extra security measure built into the battery that affects the ESC and dash. The only way to defeat it was the old ST-Link method to bms and rolling it back. But if you have a Max with this battery firmware, it'll shut down the scooter once it detects a load on the motor. When I bench tested inside my shop, I had no issue running at 18mph. Put it back together and went for a test ride, and 10 secs later, beep and shutdown.
Has anyone else encountered this and maybe found a workaround or another solution??