I have just wired up my Bestech BMS 10s 80A. Board is running fine but when I accelerate from stop giving full throttle/accelerating up steep hill it cuts off whole board and I have to switch it off ( using built in BMS switch ) and switch it on again to resume riding. As it is 80A I’m surprised it cuts me off. I’m sure I’m not pulling 80A.
Here are my specs:
10S 8ah batteries in series ( Zippy Flightmax 30C - 40C Burst - all the same.) SK3 6374 192 KV motor ( 80A) FocBox 15mm belts
Cutting out happens while I have 38V or 42V ( fully charged) so it can’t be over voltage protection ( I have 57V set up in BLDC). Running BLDC mode. I have done motor detection. Do I have to redo it when unplugging phase wires?
Since I have two same BMSs( minimum order two) I have tried both thinking one can be faulty. Unfortunately it is the same behaviour on both.
I’m sure it has nothing to do with FocBox. I can’t even read any fault codes as BMS cuts off power and faults are erased. I did check on bench motor with live sampling and with no load I’m pulling 3-5A.
All connections ( phase wires, battery wires, etc) are shrink wrapped and taped with electrical tape to avoid any possible shorts.
Using @Ackmaniac software - moderate settings- here are screenshots.
Any idea on what can cause the cut off? Fuse on BMS is rated for 90 Celsius rather than Amperage but don’t quote me on that.
@Namasaki have you had similar problems?