You can just add some balancers to it
three of these
And if it’s too big you can probably carefully cut this at the red line, it will just balance slower but still balance probably (you’d have to test it)
Prob much easier and faster then making a BMS.
Looks like an interesting option for my project also. I just feel so dumb when reading the product description on those units.
Multi-cell 3.7V/4.2V Li-ion/Polymer Battery(packs) Charge Balance Module
(1) High Precision Voltage Detection Circuit
Can you set overcharge and release voltages on these units?
Can you link the unit?
I mean the product description in the eBay unit your picture is linking to
Oh, I see. If you select from the dropdown “4V2 84MA” then I think it’s what you want.
But I would test it for sure.
Those specs look copy/pasted and probably the factory saying “We can make in this range” but the seller never updated to say what it was actually made for. Or it’s only specified in the photo text.
Maybe ask the seller.
No space for three of those 
And making someting like that, with smaller components on both sides of the pcb would be easier, I’d really want to pass information on the individual cell levels to the controller, so I can have an idea what’s going on in the pack.
would a motor like this be ok for a diy onewheel-maybe use two of them?
At 80% efficiency with a 13s battery it can go at 1092rpm and with an 11inch tire that is a no-load speed of about 35 mph.
A bit expensive, but maybe an upgrade over the P-hub 188 to achieve more speed?
I actually have played around with a custom wound version of that motor!
The KV is good but I see a few issues with it for our use, it’s a lightweight aero motor whose bearings and frame are not strong enough to stand on and so would need some extra bearings and a strong rim to take the wheel. While the nearly 3 kW power rating sounds nice, that’s a 600g open motor which assumes a propeller is forcing air through it at all times. Continuous power if enclosed somewhere is likely a bit above 600W thermally limited, atleast I have found this 1W/gram to be a good rough rule of thumb.
The biggest draw of the Phub isn’t any motor characteristic, but the fact it comes with the rim, tire and everything ready to screw onto a frame. Even having to delta-modify it to get good speed is easy compared to designing and milling a custom rim + bearing holders in my opinion. If only they sold the 800W version with ~20 Kv
For the bigger wheels, there exist a few nice hub motors such as this but it’s also from PeiPei, meaning getting some actual specs is hard. The ones from Qsmotor are great and the manufacturer actually is communicative, but tend to be too large and narrow.
Hey,
I’m currently debatting between the hoverboard hub style and p-Hub style for a DIY.
How hard of a modification do you reckon the delta modification would be?
I’m not that knowledgeable about motors but i think i can follow instructions if i nkow what i’m looking for.
New 800w phub has higher kv with no modification. I was just going about 12-15 mph at 50-60% duty cycle. Haven’t pushed it enough to hit the tiltback at 75% duty cycle
Oh that sounds great. What battery are you running it with?
12s. Just running two 6s drone batteries in series right now for testing stuff. I should check my log, just got my module hooked up.
Cool. I might be dumb but I can’t wrap my head around which motor voltage would make sense. I see them at 24v, 36v 42v and 60v. Would 60v be useless unless I run a giant pack?
As far as I’ve been able figure out all the voltages are the same motor. I ordered the 36v-800w, my brother ordered the 24 or 48. So we can test if there is a difference.
Just was analyzing the logs. On a flat my max of 13.6mph (22km/hr) was 68% duty cycle. Going up a small hill, max duty cycle was 71% at 21 km/hr. Using vesc speed so assuming my wheel diameter was correct and such.
oh nice, let us know if you notice any major differences.
I’m probably going to order one next month, and i’m glade people like you YOLO for science before me
i’m not sure what they mean by self balance scooters
With an 11" wheel?
