Posts tagged: ebike

The Voltitude bike

By , June 13, 2011 9:56 pm

I first saw this electric bike here.

What I love about this design is the way it folds up into this very small footprint. Have a look at the video:


It’s about 20kg (44pounds) and the max speed is 25kph (16mph).

voltitude folding bike electric

voltitude folding bike electric

voltitude folding bike electric

I like the very simple graphic interface.

voltitude folding bike electric
There website is here: and they have this neat video in french:
They say, they spend a lot of personal money on the project.  They have 800 pre-order and the Chinese are interested!

In the video they talk about the price and it should be between 4000 to 5000 Swiss Franc (CHF) so that is $4782 to $5980 US.

Inside a ebike hub motor

By , July 23, 2010 6:00 am

When I was in Calgary doing my intern at Solarbotics, I when to this store called Power in Motion that specialize in urban electric transportation.  They had this neat demo wheel of the inside of a hub motor.

electric hub motor

electric hub motor

Here are the hall effect sensor. There is 3 sensors.

electric hub motor hall sensor

Here you can see the slot inside the shaft where the wires can travel.

48V lithium battery

There was also this neat battery. 48V 10.5Ah lithium battery. It weight 3.4Kg (7.5Lbs)

48V lithium battery

48V lithium battery spec

48V lithium battery

That could fit in my scooter. The only draw back of those specific battery is the continuous current discharge. It is very low. I think it is 2C so 20Ah… the motor consume about 4Ah with no load and I get surge current of 70Ah.

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