I’m starting a new build.
I’m an amputee, Right leg, and my girlfriend is a fanatic ATB rider and in the weekends she go on trips for trips from 40km -80km (25/50mls), mostly singletrack.
A few weeks ago a friend lend me his Bultaco elektric ATB (2Kw motor, 50V/26ah 1,3KwH) to ride along with her.
The battery lasted only 35km (22mls) It Is impossible to buy a lager battery for the Bultaco, and i started looking for other options.
Battery had to last for 80Km single track. Bultaco did 35km with 1,3kwh, so it must be 3kwh.
Motor power 2kw
Light if possible
Compact, because we have to transport a normal ATB en My MTB ebike in a Citroen Berlingo.
Durable, fail proof. Since i have only one leg, and cannot walk if the bike fails.
After several weeks searching on the internet, i decided to build my own.
With the info i found here on the forum here i went for:
Build my own Battery 72V/44,8 Ah 3,2KwH
Kelly controller KBS72121X
Cycle Analyst V3
A donor ATB bike fort he parts
A Crown or cromotorV3 (for reasons of finance, the first motor wil ba a Crystalyte Gmotor thati have from a preveus project.
The people at Qulbix told me that i needed a 140 wide frame to fit this large battery, but my calculations told me that i can do with an 75 small frame, and i want the controller inside the frame.
At this point i received almost all the parts i need, en started building.
First the design of the battery. It’s not easy to cramp a 3,3Kwh battery +controller inside a Qulbix 75 frame.
Next is to finish the battery and mount it together wit the controller.
To be continued…..
Tips from you, experienced builders are always welcome.