Hi Don,
I’ve seen that you have quite a bit of experience with Votol controllers, so I was hoping to get your advice. I’m in the process of converting a 2011 CRF250 into an electric bike. I don’t have much background in the electrical side of things, so I’m trying to learn as I go and gather as much info as possible.
I’m planning to use a QS138 70H V3 motor with a Votol EM260SGTP controller, and I’m just about to order a battery from AMORGE.
My main question is about open discharge. My biggest concern is that if a short circuit occurs before the fuse, there could be essentially unlimited current flow, which could burn out the motor — hopefully only the motor in the best case.
A BMS would provide protection, and if it’s properly rated, the FETs shouldn’t overheat. On the other hand, open discharge allows for unlimited regenerative current, and makes the battery setup lighter and cheaper.
What I’m not sure about is whether the Votol can safely handle around 200A of regen current, or if it would be smarter to go with a battery that includes a BMS capable of limiting that.
Have you had any experience with this type of setup, or is this risk overblown?
Also, what battery specs would you recommend ordering for this configuration?
Thanks a lot in advance for your help!
Cheers,
Attila
