I was riding home from work yesterday and found my older space cell which I’ve since upgraded to a 4P pack (the version with 50A BMS) completely shut off several times. Each time it occurred while I was mildly accelerating and low speeds (ie. not much faster than walking speed).
In total, it happened 4 times within a matter of ~10 minutes, each time while I was riding on the flat. After this I managed to continue riding the rest of the way home without any more issues which is about 5km with several large uphill sections, one of which is over 1km long.
I’m assuming it’s an issue with the battery/BMS and not my VESC because I completely lost power and the LCD battery meter turned off until I flicked the power switch off and on again which would solve the issue.
From memory these are my VESc settings:
Motor Max: 60A
Motor Min: -60A
Batt Max: 40A
Batt Min: -15A
Absolute Max: 130A
Min Input Voltage: 8V
Max Input Voltage: 50V
Battery Cutoff Start: 33V
Battery Cutoff End: 28V
From memory, these are the only settings I’ve changed other than for setting up my remote.
At the time, my battery was on around 60% - 70% so I don’t expect it would be a result of the low voltage cutoff kicking in.
Here’s my board main specs:
Enertion 6374 Motor
10S4P Space Cell
Hopefully somebody has an idea as to what might be going on, let me know if you need any more info.