My mid-drive E-Skooter

Lightweight / Folding / Portable EVs - seats optional
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armandd
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My mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:08 am

Hi guys. I'm Armandd from Malaysia. I just wanna share some pics and details about my e-scooter build, which I plan to use as a commuter. My workplace is only about half a mile from my home. It's only about 50% completed at this moment. The chassis is made from bicycle parts welded together and the battery box is a stressed member of the chassis. I use 13 inch wheelbarrow wheels and tires mainly because they are dirt cheap to purchase and replace (only 6.32 USD per piece). However, they do create some issues which I think I can solve. Here are the specs:

Chassis: No suspension. Mainly steel, some extruded aluminium and hard wood. Some welded together bicycle parts.
Motor: Unite Motor 24V 450W DC geared brush motor. 420rpm no load speed, 395rpm with load. 10Nm at the output sprocket.
Controller: Yiyun 500W 24V or 800W 36V (can't decide yet).
Drivetrain: Chain drive, 420 size bicycle chain. Front 16t freewheel sprocket, rear 17t single speed sprocket.
Battery: Sealed Lead-Acid SLA 12V 7.2Ah x 4, 2s 2p (I plan to upgrade to 18650 lipo cells later, when my budget allows).
Brakes: Cable operated discs, 203mm front, 160mm rear.

Some mock-ups.
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Last edited by armandd on Jan 21, 2018 5:46 am, edited 4 times in total.

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armandd
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Re: My funny looking mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:12 am

The fabrication of the chassis were mostly done by a welding shop.
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armandd
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Re: My funny looking mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:14 am

Reinforcement work.
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(174.22 KiB) Not downloaded yet
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Last edited by armandd on Jan 18, 2018 11:19 am, edited 1 time in total.

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armandd
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Re: My funny looking mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:17 am

Motor and controller.
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armandd
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Re: My funny looking mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:23 am

Battery box, SLA batteries, controller and DC-DC converter. Cooling fans will be added later.
20180117_172857ed.jpg
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armandd
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Re: My funny looking mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:27 am

Mock up of front fork using wood.
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armandd
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Re: My funny looking mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:30 am

Completed front fork.
20171230_221110ed.jpg
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armandd
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Re: My funny looking mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:35 am

Making handlebar clamp from hard wood.
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armandd
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Re: My funny looking mid-drive E-Skooter

Post by armandd » Jan 18, 2018 11:36 am

Some parts I purchased from aliexpress.
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IMG-20180110-WA0015ed.jpg
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armandd
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Re: My mid-drive E-Skooter

Post by armandd » Jan 19, 2018 9:12 am

I have one question: Can I overvolt the 24V motor to 36V? Will this really affect the life expectancy of the motor? :?:

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armandd
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Re: My mid-drive E-Skooter

Post by armandd » Jan 19, 2018 11:11 am

This is me on the scooter. I'm 6' 1"/ 186cm.
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armandd
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Re: My mid-drive E-Skooter

Post by armandd » Feb 16, 2018 3:30 am

Recently I painted the handlebar stem black, changed the floor board to a bigger one, and lowered the ride height. I think it looks much better like this.
2018-02-16 16.23.20.jpg

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armandd
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Re: My mid-drive E-Skooter

Post by armandd » Feb 16, 2018 4:30 am

Another shot.
2018-02-16 17.28.09.jpg
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Rikobonito
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Re: My mid-drive E-Skooter

Post by Rikobonito » Feb 17, 2018 8:25 am

wooooohoho :D this big toy !!! Love it !
What a perfect custom mode that you made here. (I would love to learn about welding !!.. It will be so help full for my little e-DirtScooter)
Good contnuation, I stay around ;)
my little blog with e-sk8, e-Cruiser, e-pintail, e-MTBoard, e-Dirt Scooter and others builds
... I wish also an e-MTBike soon !! :v: Thanks DIY Power community :wink:

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