Bafang BBSHD Controller - How to Know if it Supports 52V/

[tmort]

I got a bafang mid drive in about 2017 from Luna Cycle. I have a 48V battery pack and it works well. I haven't had any reason to look into this before.

I plan on making some changes and replacing the battery is one of the changes. I read the motor can handle 52 volts, but the controller may have an issue and that might trigger an overcurrent shut down. It sounds like it what the controller is set for has changed a lot over time, etc.

I'd like to make sure mine can work with a 52V pack before I go ahead and purchase one. If it doesn't is there a way to change this setting? I see there are apps and a web version to change some settings, but did see anything about this.

I did read that the Eggrider will change what it displays the charge left or voltage for either which doesn't sound like that is the case for the displays supplied by Bafang. It too has an app you can change some settings on, but again in reading the manual I didn't see anything about changing a setting.

It seems like although I got a 52 volt battery this setup was supposed to work with either, but I mainly don't remember and might have been just as confused about this then as I am now.

 

[Diggs]

My Luna BBSHD is about the same age. I've run it with a 52v pack since day 1. The only oddity is that that BMS on a 52v pack shuts the pack down when the display still shows 4 bars. Once you realize that 4 bars is zero it's not a problem.

 

[tmort]

Thanks for the reply. That is good news. I've done a little more digging since posting too. I did find my purchase order. It didn't give all the details of what I bought, but it did list the options and accessories I could order. One was "750 watt street legal". I think I would have ordered that.

I've heard about how the voltage would be off on the display. I have an Eggrider and I think it can be adjusted to offset things so the voltage reads correctly. So the BMS cuttoff should correspond to zero. I know I had the Eggrider app installed and looking things over I vaguely remember setting it up. I think I can get some motor/controller specifications from it too.

I couldn't remember any label on the controller, but did check and see there is one with a number on it. I have a chain guard on my bike that obscures it. There is also some dirt too.

 

[Diggs]

One was "750 watt street legal". I think I would have ordered that.

All the hardware is the same. They just turned it down to ~25 amps max instead of the normal 30 amp setting. You can turn it back up.

 

[furcifer]

All the hardware is the same. They just turned it down to ~25 amps max instead of the normal 30 amp setting. You can turn it back up.

It's been a minute and I'm not familiar with the CANBUS controllers, but all the old BBSHD controllers were the same physically but limited by firmware.

And pretty severely. Daniel's open source is 33A and lets you run 60V, so your 750W BBSHD can be flashed into a 1980W BBSHD without any modifications. With a little free time and a soldering iron your 750W BBSHD can be a 3600W rocket.

I've seen some restrictor plate detuning back in the day, and I think the recent Toyota Supra had some easily flashed programming that unlocked about 100hp. But the BBSHD as sold out of the box is about 1/5 of the power it can reasonably handle. Imagine if you bought a 200hp Civic that could be bumped up to 1000hp with a USB cable and 2 $0.25 resistors.