Low voltage cutoff on BMSbattery controllers

[drebikes]

Hello, I wonder what the LVC values may be on the two controller bellow and if it ts adjustable:

S06s:
https://bmsbattery.com/ebike-kit/546-s06s-250w-torque-simulation-sine-wave-controller-ebike-kit.html
S09s
https://bmsbattery.com/ebike-kit/553-s09p-500w-torque-simulation-square-wave-controller-ebike-kit.html

Thanks

 

[wturber]

It is the min V printed on the label as shown in the photos. So 30v for the one and 30v or 40v for the other. The combo controller will auto-configure when you first hook up the battery and decide if it has a 36v or 48v attached and hence a 30v or 40v limit.
If you use an LCD5 or LCD3, you can configure the low voltage cuttof a little bit. I think you can drop it a maximum of 2v lower.

 

[drebikes]

ok wturber, so it auto-configures based on the battery voltage it sees. I wonder if the 36/48V one can also recognize a 24V pack, but this would be bonus.

 

[wturber]

ok wturber, so it auto-configures based on the battery voltage it sees. I wonder if the 36/48V one can also recognize a 24V pack, but this would be bonus.

I think they call it a 36v/48v pack and not a 24v/36v/48v pack for a reason. But you can always check with the folks who sell it. In fact, you should verify with them that what I said is correct.

 

[drebikes]

I get your point, but to understand where I come from I should have said I've tested my EM3EV Infineon 4110 controller that shouldn't be compatible with a 24V battery with exactly this. If you dial-in the correct cut-off VDCmin it works fine.

 

[wturber]

But as I explained, the LCD3 and LCD5 displays that can configure those controllers only allow for a downward adjustment of 2 volts. So it is very unlikely that 24v will work. But you can, of course, ask and/or try it for yourself.

 

[drebikes]

Thanks for the feedback. If I'm honest I haven't seen the LVC on the picture, I was kinda ignoring the pic and relying just on the specs....which are very sparse.

If I get brave maybe I get on the FOC open source firmware, there I can adjust things