E-Scooter project build. 50 kw peak (video online page 4)

What happened I hope nothing serious to you or the bike. I have been following your build and wow it's great

Jim
 
hi guys.
no nothing with my motorbike. i got injured because tried to lift 170kg alone. bad idea :? so i lay flat for a couple of days.
recovering and ready to ride the beast again. :mrgreen:

INFORMATION:
today i give my friend a visit. he is the boss of GREENWAY BATTERY factory here in my city.
i wish i could show you some photos but he begged me not to to this. they hace some pretty cool machines there.
a high speed 18650 battery tester and selector for example. or automatic pack welding robots and stuff. really cool!

we talk about the problems of bike batteries. (always weak and slow)
we all want more power and he ask me for cooperation. if we can start a forum group order he will help me to make customized high power batteries.
shape can be like a bike frame or any other shape with custom BMS and charger for good prices.
also scooter batteries !


anybody interested?
 
You are in Shenzhen? I'm in Shanghai. I'll be down in Shenzhen in a few days and would love to see you beasty in action. :mrgreen:
 
of course i will give you all informations like C rate , cell brand, mah and stuff.
i need to know what specs you all prefer.
 
Hello steam!

It's a really nice build you've got there. Im really impressed.

I would need somthing similar myself for riding to school after the summer. The distance back and forth is about 30km with a road speed limit mainly at 80km/h.

I'm thinking of buying a registered class 1 moped (scooter) as we have here in Sweden and upgrade it! Permitted speed for those are 45km/h (55 commonly) but most likely this projekt won't go that slow. And if the policeman ever want a testrun i could just limit the amps. The legality is my problem so don't worry about that!

Anyway, your setup seems very good. I've been searching for a place who sell the motor you've got, and did only find this. May I ask where you picked up yours and for what price?
http://www.aliexpress.com/store/pro...or-electric-motorcycle/109978_1746442344.html
It looks fine but shipping to Sweden(northern europe) is expensive, $250.

Nothing is determined yet but everytime I would need to order parts it will take quite a long time for shipping, so yea I'll need to start pick up stuff if it shall get done in time. And those batterypacks you're speaking of are definitely interesting. We can sure discuss more about that when the time's come.

Hope you post more of your projekt soon, it's really fantastic (I'm so jealous!)

///Jacob
 
hi jacob,
hello all other guys still with me reading that

i was on holiday a while.
before that i test the scooter about 1500km now without ANY issue!
instead of that it seems the battery is properly balanced and i can remember to have around 260-289A peak on my first runs.
last saturday i made another high speed test and got nearly 350Amps peak :shock:
running that scooter on a highway scares the crap out of me. doing 70-80km/h, punch it and go like a rocket is soooooo great!
i am seriously impressed.
the motor you found is not the same. but i can help you to get one because i am in close privat contact to the quanshun guys.

i will definetly do some more videos footage for you guys. i wish somebody else can ride it while i am filming from another car to show whats going on on highways but nobody here want to be the pilot after he see how that thing take off at higher speeds.
my chinese friends are such pussies but i thought some foreign guys are man enough to go full power. but no luck until now. i will do it myself and apologize right now for the poor upcoming shaky video :roll:

battery range:
going fast and city all time gives me honest 85km range
go normal speed in city and not try drain the battery at all costs give me around 100km
try to safe energy, use REGEN most time to brake and ride around city+highways at max speed of 60-70km/h is around 140km. (i never ride the pack empty and its always around 5-10Ah left. like use 55-60Ah from the 70Ah pack for example.

overall feeling:
still a pure joy to ride this scooter. full success i think. i never thought electric power can be that brutal. i pull my hat for you guys ride "real" electric motorcycles with some serious power.
brakes are too powerful and i am about to find a way reduce the power somehow. unexperienced person would probably crash because the front brake is crazy sensitive. (i mostly use rear+REGEN+very little front)
next step will be better shocks.
later another motor (more torque, less speed at around 110km/h is enough) now i had max speed around 135km/h but it feels like going 210)
new controller with more power (we talk about that before)

more videos will follow very soon. i try to strap my gopro3+ theses days on and make some more footage if you like


@jacob contact me directly and i try help you to get your motor and stuff cheaper to your house cause i am working together with some good couriers

my adress: steam25@gmail.com
 
https://www.youtube.com/watch?v=2m_mUtoEC5Q&feature=youtu.be

video is short and fast. (thats how we roll right? :mrgreen: )

got some more clips should i throw them together and upload?
 
your bike is ripping! My basic version of yours isn't running yet. Not sure of the issue. Fitted a spare wheel from the second bike and checked halls and continuity and all seems good. Swapped through all three controllers I got with the bikes, nada! Not sure how one tests a controller to be sure it works!

Anyways your bike is awesome Steam, like what you have done!
 
hi,
verry nice build! :wink:

a question;
so you don't recomend a kelly?
i want this one:http://www.westbike.nl/home/gebruikte-technische-onderdelen/controller-gebruikt/kelly-controller/
any good? 24/48v 6000w.

thanks
 
i dont recomment kelly. not for high power surposes. for daily use its ok and power is good at high speeds. but the fact that my scooter can use full potential AFTER hit 60-80km/h is not good. funny if you love high speed and near death situations.
i wish i could use same high power at low speeds like 10-40km/h but its nearly impossible to over 100-150 amps at these speeds.

still...if i ride it on wet streets i have to be careful on throttle. after hit 50-60 its like getting a boost and the bike want go sideways. wet streets are also difficult for the brakes. i know how to ride motorbikes but these brakes are rediculous sensitive.

if you want be relativ safe you can go with kelly.

if you want have real fun and use full potential of the motor go with another controller cause kelly isnt for racing. long range cruising at higher speeds. thats what its good for. so far from my experience
 
Steam if a hub motor was wound to be more low end and less high rpm you think the Kelly would work better? Is it possible to have a hub motor for more acceleration? Your videos have been fun to watch!
 
if you have so much fun enjoy the little longer version : https://www.youtube.com/watch?v=n-1xqopL6rA


and yes i also think about getting a new motor for higher torque and lower speed plus smaller tire. tire now is really huge and high. barely fit in. but i think it wont make THAT much difference.
i will try to change someday and test it. of course let you know the difference.
 
Tell us which motor you'll get. I'm interested on low speed high torque and high efficiency motor.

Currently the only motor who can do that is the mini-hubmonster from john and it peaks at 93% efficiency
 
Steam25,

Tell us what controller to use for better performance than with Kelly. I'm hoping you know of good priced controllers for the job without going to the big cost and difficult to set up Sevcon's. With so many millions of electric scooters being produced in China I can't believe we are still suffering with poor throttle control and no variable regen braking. That was the biggest problem 6 years ago when I first got into this, and I'm baffled why the electronics guys haven't already solved these issues for us. I'm more sensitive than most to controller pricing, because my motors require 2 controllers.
 
guys i also dont know what controllers are better...

motor is quanshun 8000w modified and reinforced. that motor is awesome and even loger high power runs it barely go over 60 degrees outside
 
Aaaah only 85% efficiency
http://vito8828.m.ec21.com/mobile/productDetail.jsp?productId=8435951&groupId=8355150

Is it the one you want to use for more torque?
 
yep! this motor is best stuff i ever used. efficiency here or there. i love it. range is good. power is awesome and temperature never even close to limit even i use it with 25-30kw often.
and yes i want try the higher torque version because i am close to the quanshun guys.
 
cwah said:
Aaaah only 85% efficiency
http://vito8828.m.ec21.com/mobile/productDetail.jsp?productId=8435951&groupId=8355150

Is it the one you want to use for more torque?
Click to expand...
I do not see any performance graph, but 85% efficiency will not compute with stated power levels.
ES members mostly refer to peak efficiency and they description states
Efficiency ≥85%
Click to expand...
which means more or equal to 85% in my understanding. In this case things start to make sense. :wink:
 
steam25 said:
after 3 days of fighting with that rubish USB to R232 converter i gave up and try to contact kelly service for help.
Click to expand...
I know its of little value now but I used a number of different USB to RS232 converters back in my server admin days and some worked considerably better then others. The core of it is some had a different chip in them (thus utilized/needed a better written driver for the OS.. etc) Can't make any specific recommendations but you know its normally the more you pay the better it is type deal, as long as their are all priced from same dealer though.

I guess direct USB to USB port in controller is the future, probably increase costs but its probably worth it.

I just finished reading the whole thread, was quite juicey in some ways... thanks.
 
FWIW, there's no such thing as a "higher torque" version of an otherwise identical motor. "Slower and lower power" is a better description given that our voltage is limited. If you're doing lot's of stop and start riding, and/or hill climbing it will likely enjoy an overall efficiency advantage, but that's it. They're capable of the same torque. The higher Kv motor just needs more current to generate that torque, but it is wound with thicker wire so it can handle the higher current. If you're not having heat issues, then there's no reason to go for the slower motor. :mrgreen:
 
oh really? than i got wrong informations.
so if i get same motor with lower KV its the same ass slow at start?
i always thought its like to have lower gear?
then i dont know what i can do for now to increase the take off performance...
 
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