Hi Guys!
I’ve been lurking for a few weeks now and decided that I want to show you what I’ve been working on since you all heavily inspired it (especially @Fungineers).
It’s all completely theoretical since I just ordered all the parts this week.
Probably some of you could give some feedback what could be done better - I am a complete novice in building batteries, ESCs and BLDC motors…
Here’s what I’ve planned in terms of hardware:
Phub188 motor from PeiPei (48V, 800W)
2 packs 13S2P 18650 batteries with BMSs (would have to build them myself so they fit)
VESC 4.12 based controller
Arduino Nano + 1.3Inch OLED Display (to show battery level and hopefully speed, mileage, etc.)
Footpads: Car seat pressure sensors (usually for belt warning) under the concave footpads
BMI160 IMU
LED COB Strips for front and rear (each will have red and white)
Buttons: Power, Lights, Mode (to switch what the OLED shows)
GX12 Charging port
Step down converter to 12V
obviously some fuses, a anti-spark-switch, connectors, etc.
I’m aware of the fact that it’s really close to the maximum voltage, but I’ve read that some people are doing fine with that combo so I thought I’d give it a try.
Have you bad experiences with vesc 4.12 based controllers?
You are better off with a cheap focer 2 than any 4.12. It even has a built in IMU.
I even heard problems with 12S on 4.12, I definitely don’t recommend 13S with a vesc 4 based esc. Even with vesc 6 based ones I only recommend 12S. Maaaybe you could also have a look at a 75V vesc, that would be the best for 13S.
Thanks for the input!
I thought of the Cheap Focer 2 too, but diy seemed too complicated for me, should I just get one from fungineers? It’s also “just” rated at 12S, but I could simply make a 12S battery instead of a 13S - fitting fewer is easier than fitting more in such a small space
The problems that people are saying about 4.12 on 12s are really only from people who mismatch their motors to the voltage and overrun the max erpm or voltage. I have run 12s on 4.12 vescs for 4 years now with no issues.
I think you would be okay with 12S, even 13S if you had Focboxes due to your application. While it is close to the maximum rated voltage of certain components (60V) that hub will probably not reach that voltage even on regen braking. Dickoz (lel) ran 13S on focboxes for a long time with no problems, but that’s the only one I can think of that consistently did that
As others have also mentioned there are some other alternatives to 4.12’s
I’m still tinkering with the design so in the pictures it’s actually 4015 but I think I might have to go with something a little wider to fit everything…
Alright! @doomy is running a group buy I recommend checking out then! He can also solder everything for you if you ask him, than the price will be around 60€ I guess. Full DIY would be 30€.
Thanks for the fast reply!
going 12S would be no problem for me, just thought I go max. voltage because of some people reporting that the kv on the phub188 motor is kinda low…
