I think I blew up my Bafang 500W mid drive (Smoke)

[1000RR]

Hi everyone,

I can't believe that this happened. I was working on my bike all weekend, tested the system with the unmodified wiring harness and it worked great. Me being a man of tinkering and perfecting, I cut the harness wires to shorten them for a clean look, this was fine for the speed sensor and the battery.
When it came time to cut the main harness, things got a little sketchy. There was a yellow wire in the main harness which I have no idea where it goes to since none of the connectors for the LCD or throttle had a yellow wire. This is when I turned the unit on to check and had an error 30 on my LCD screen.
I moved the bike not realizing the battery was on after I powered off the unit from the LCD, saw sparks come out of the main harness which had stripped wires and smoke came from the battery or possible motor area with a bad smell. Unit will now not turn on.
I guess I tried to open the motor after that but can't even open the damn thing. I am thinking the controller is fried, does it have a fuse?
Please help

Still mistake and expensive since this motor did about 5kms. It's also currently my only form of transport which sux even more.

 

[teslanv]

No fuse in the controller, although you can replacement controllers easily enough. That would be the worst case scenario.
Pull the controller from the motor housing and check the phase & hall sensor wires. If they are not scorched, you have some options.

If you are intent on modifying the kit, maybe try a stand-alone Infineon 4110 controller. A 9-FET would do wonders for the drive... Pair it with a 16S LiPo battery and a CA3 and you'll have a nicely upgraded mid drive kit.

 

[1000RR]

No fuse in the controller, although you can replacement controllers easily enough. That would be the worst case scenario.
Pull the controller from the motor housing and check the phase & hall sensor wires. If they are not scorched, you have some options.

If you are intent on modifying the kit, maybe try a stand-alone Infineon 4110 controller. A 9-FET would do wonders for the drive... Pair it with a 16S LiPo battery and a CA3 and you'll have a nicely upgraded mid drive kit.

Thank you teslanv.
I really like the integrated controller for now, power is actually quiet nice for what that kit is which is why I really want to keep it in stock form.
does anyone know where the actual controller sits in the motor, is it on the chain side right hand crank with the small Phillips screws.
so if there is no fuse, I probably burnt out some main component of the controller? I though they had some sort of protection.

 

[teslanv]

You will have to pull the drive side crank off, as well as the chainring & Final Gear Cover. The Controller is integrated into the motor housing where the wires enter. Pull that side of the housing off and you will see the fully potted controller. Nothing you will want to fix, but you may be able to identify the failure. And as I said, you should be able to get a replacement controller from em3ev.com or lectriccycles.com or a variety of other vendors.

 

[1000RR]

So I'll have to remove every bolt from the motor for it to split? on both sides?

Thank you for your help.

 

[teslanv]

Yes, I think so. Start with the drive side, though.