An Electric Scooter Community on a Mission to Stamp out Transportation Mediocrity.

Micro mobility projects built using electric scooter components.
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By Sc00tr
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#50350
dcaird1234 wrote:
Tue Dec 01, 2020 5:33 pm
Hello all,

I built a 4s6p Pack it puts out 16.57 volts charged 52-54v and the max I can get is 20 MPH. It goes to 20 and stops increasing. Is it the Firmware?

Thank you
Yes if you haven't flashed custom firmware it wont go above 20


By CDogg
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#52568
If your max is topping out at 20 with the extra battery, then I would guess that you might want to change your serial number first. If that doesn't work, then it's probably that you have a Gen1 motor. My 48v mod would only go 22-23mph. until I learned that I still had a Gen 1 wheel. Waiting on my Gen 2 motor, to update new results.

By CDogg
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#52569
JonDon wrote:
Wed Nov 18, 2020 11:47 am
CDogg wrote:
Sun Oct 25, 2020 8:29 am
My dash readout says I'm doing 23mph full throttle. Is this due to the Gen1 motor?
About the normal speed for 13s setup with Gen1 motor. Make sure you tire pressure is 3.5 bar + otherwise you will use a bit top speed.
CDogg wrote:
Sun Oct 25, 2020 8:29 am
Also, to your point about charging the extra pack- I just so happen to have a Segway miniPro and that charges at 59v. I'm contemplating using it to charge the entire pack at once.. any objections to this or situations I'm overlooking?
I wouldn't suggest that. You are bypassing the BMS and the two packs have a different capacity.
Right, I forgot I would need to put the main battery back to the 36v and have a good bms for extra pack.

By Jimmyyahoo
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#52581
CDogg wrote:
Thu Feb 11, 2021 2:49 am
If your max is topping out at 20 with the extra battery, then I would guess that you might want to change your serial number first. If that doesn't work, then it's probably that you have a Gen1 motor. My 48v mod would only go 22-23mph. until I learned that I still had a Gen 1 wheel. Waiting on my Gen 2 motor, to update new results.
I'm not so sure unfortunately** . You could put a 1000w motor on your scooter and there still would be little to no difference. Then wattage ratings of hub motors are more to do with the varying import/export regulations of different countrys. And while it can determine a baseline as far as safe current handling capacity, it is mostly used upsell well intentioned, though sometimes uninformed, enthusiasts. A wheel will only spin as fast as a certain voltage will allow. And said deliver of those volts are determined by the controller, which in turn is limited by the battery. The world will pass you by no quicker with the gen 2 as it has with the gen 1.
Now the good news, that little 350w motor can handle a heck of a lot more power than it is now getting. I'm talking about 60-70volts worth before you need to start checking the heat its generating. And even then, with since simple mods to turn hub, you can even pad that a bit.
Also, even though the caps are rated at 64volts, that doesnt neccesarily mean it is used on an circuit that will see that many. Its not too hard to replace the caps with those with higher ratings and same function, same goes for mosfet. I'm currently working on tweaking the current sense circuit of the ubiquitous 36V Chinese Controrra. Since they dont have the shunt sticking out like some ebike controllers, the small smd shunt resistors, thin film ones that run from mosfet supply to mcu, are harder to identify though I feel close. If you trick the mcu into thinking its putting out less power than it really is, and if there's still some headroom left from the battery, altering the current sensing circuit to be more resistive might just be the trick.
Best of luck with your project. Hopefully we both have good news to report in the weeks ahead.


** take what I say with a grain of salt thouh because my knowledge is purely speculative conjecture, not practical knowledge in any way. So, as inward about to say, the whole wattage rating system of a motor is dicey, a questionable practice by an ungoverned system.. at best.

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By Krisztian Neukum
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#52844
oznet wrote:
Mon May 04, 2020 8:19 pm
... I 3D printed a cell holder I created on tinkercad...
Can you please share your 3D drawings with me?
I'd like to extend my G30 mileage with another 10p4s battery, but I have to mount it sable on the neck at the bottom of the scooter. Unfortunately I can't measure the neck geometry, but as I see you already have the 3D measurement.
I used same method on my previous Xiaomi M365 Pro, but my existing 3D printed mounting bracket doesn't fit to the G30 Max because the neck geometry is different To view images REGISTER or LOGIN for full access.

Many thanks in adavnce!

What's wrong with my m365 scooter

i replaced the controller

What's wrong with my m365 scooter

i replaced the controller

So I take it this doesn't work on a Hopr SNSC.2.2 […]

Wheels 2.0 "Atlas" Unveiled

Or replace the Bluetooth speaker pcb to enable?