Building an electric racing motorbike from scratch

[ms02]

Hi guys,

First post here, I would like to share a project I was working on, designing and building an electric racing motorcycle from scratch.

Building an electric racing motorbike from scratch

Some personal stuff about computing, electronics, mechanics and personal projects.

blog.ms02.es

Hope It can help someone to take technical decisions and success with their projects!


Regards!

 

[99t4]

Great work!

Moving this thread to EScooter/EMotorcycle Build Threads as it is not an ebike.

 

[harrisonpatm]

Amazing build! Specs please, and top speed?

 

[ms02]

Peak power: 41kW, 140Nm (I think all ME1616 datasheets are overrated).
Top speed: 180km/h
Battery: 28s 20p (117.6V, 90Ah)

I'm currently working on a dyno to focus on field-weakening to achieve more speed.

Regards.

 

[bananu7]

Oh my, that's so amazing. I especially loved how you started with the design constraints for the element locations and suspension angles, then built the frame just connecting components "suspended" in their final locations.

And then 3d-printing welding guides, and designing a jig in CAD as well, and using only straight tubing... such an inspiring post, definitely feels like making a frame from scratch this way is within reach for a determined hobbyist! I still have a lot left to read but thanks for posting it publicly.

 

[Stealth_Chopper]

bananu7: "Oh my, that's so amazing" agreed
ms02;
You list impressive engineering accomplishments , Bravo.
May I presume that Data A.I. was used to multiply your " engineering power " times 100 or more from a traditional perspective.
Your work is likely way beyond 100 times power?
Mike

 

[ms02]

bananu7: "Oh my, that's so amazing" agreed
ms02;
You list impressive engineering accomplishments , Bravo.
May I presume that Data A.I. was used to multiply your " engineering power " times 100 or more from a traditional perspective.
Your work is likely way beyond 100 times power?
Mike

Hahaha, unfortunatelly, when I started the project AI wasn't as developed as now so, there is only hard work behind, hours and hours of research, test, you know.

Regards.

 

[Grautuefel]

My god man, that is some seriously impressive engineering and fabrication. You'll do well, your blog is well written and follows the engineering decision making process beautifully. Kudos to you and the team for some genuinely smart processes there.

 

[jonescg]

Nice work! Awesome to see some folks still keen on building race bikes here
I too started with the motor and built the bike around it. Only way to go.

Any details on the battery?

 

[ms02]

Nice work! Awesome to see some folks still keen on building race bikes here
I too started with the motor and built the bike around it. Only way to go.

Any details on the battery?

Configuration: 28s 20p
Cells: Molicel P45B
Voltage: 117.6V (full)
Capacity: 90Ah
Cells: 560

Busbars cutted by laser and with nickel tabs of 0.15mm to be able to make spot welding. 4480 welds made.

Able to discharge 900A continuously.

Regards

 

[jonescg]

So nickel all the way? Or any copper in the mix?

 

[harrisonpatm]

Configuration: 28s 20p
Cells: Molicel P45B
Voltage: 117.6V (full)
Capacity: 90Ah
Cells: 560

Busbars cutted by laser and with nickel tabs of 0.15mm to be able to make spot welding. 4480 welds made.

Able to discharge 900A continuously.

Regards

Your battery is basically the same specs as mine (28s 30p LG MH1, same total voltage and capacity, 840 cell, capable of 300 amps continuous), it's interesting to see the two applications for what is essentially the same power source. Short-range speed vs conventional commuter. Obviously your cells have 3x the power output, but that's what's necessary if you wanna go fast!

 

[jonescg]

So nickel all the way? Or any copper in the mix?

Ah, I see you're using the nickel tab with copper bus plates. I found the only way this works successfully is if you solder the nickel inserts in place, which is a lot of work for a DIYer. Also, unless there's some thin copper linking the cell to the plate [aka nickel-copper-sandwich(TM)] the nickel can't handle the current.