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Home Made Electric Bike

Here’s a short video of someone who modified his bicycle to go electric. He used a brushless motor and a pack of several Li-Ion batteries of 36V capable of 30A (about 1kW). You’ll, see, he uses two, four, six, or eight of these batteries. That’s 8kW = about 5hp. That’s more than a regular motoscooter can do! I don’t know if I haven’t done any miscalculations, but this thing could get you to 100km/h easily! The batteries can be recharged in about 30 minutes. Watch the video and pull your own conclusions. After you did that, leave me a reply using the form below!

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About the author

Ovidiu has always been a fan of technology and Captain Planet. Unable to ignore the technical possibilities that exist nowadays, he started collecting and blogging about the most interesting news out there and saw that there were a lot of people interested in the same that stuff he was.

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Comments

  • Blind Freddy

    Jason is entirely correct in the power capabilities of this bike. If you pedalled as well, of course, you would start to get more speed. Yer average Joe can _comfortably_ put out maybe 100-150W over long periods, though, so a 300W motor is quite an assist.

    My other thought is that using pre-packed Dewalt, Ryobi Bosch etc batteries is a really expensive way to get the batteries. You can get similar stuff from RC places for a lot less, just in a shrink wrap pack, not the proprietary drill-saw boxes. Recharge times will be affected by the battery quality and of course the charger’s capabilities.

    DO NOT CHARGE LiPo BATTERIES WITH ANYTHING BUT A LiPo CHARGER THAT HAS CHARGING AND MONITORING FOR INDIVIDUAL CELLS. If there is a faulty cell in a battery, they can blow up. Houses have been burnt down like this. Read up on LiPo safety and believe what you read about over-discharging (your system should include a way to monitor each cell during use, warning of under-voltage at safety levels or even slowing or shutting the system), impact, incorrect charging, visual danger signs with batteries (not including smoke and flames :D).

    Not trying to spoil the fun, but just keep in mind

    Nick

  • larry english

    wrong
    motor is limited to 400 w input
    about 300 w output if you are lucky, to the wheel
    = about 19 mph on flat ground

    wle

  • http://www.wildnaturesolutions.com craig sparks

    Hi everyone.

    check the cool solar electric recumbent trike and lots of other goodies..
    go here:
    http://www.wildnaturesolutions.com

  • http://www.ezycommuter.com.au bikes

    wow, this bike looks so cool@!@

  • Jason

    I think you may want to re-evaluate your conclusions. Batteries are the potential power available. The motor is only a 300W Brush less DC motor. Thats about 0.4 Hp. Which would work out to maybe 35 – 40 Km/h depending on driver weight. You could put 100 Kw worth of batteries on there and it wont make it go any faster.

  • Gene S

    Nice Design. I am going to bookmark the site for my project.

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