I'll
share some information about electric scooter on this page. The
main idea of this scooter was to build it as cheaply as possible
and employ parts and materials that can be obtained for the cost
of asking or a little expense. Thus front wheel, front fork,
rear seat, and back part of the frame come from an old but very
solid build kid's bike and cost only $5.00 from the recycler (
wheels are 8-inch diameter).
The
controller (Dynamic Controls 110A Rhino controller) came from a
mobility scooter and was donated by a mobility scooter repair
company for the cost of asking,
the rear wheel and
the 250w motor (permanent magnet "Unite Motors") are the only
genuine scooter parts: they were bought from a local internet
auction for next to nothing, as are second-hand ones. all
wiring, voltmeter, switches, and fuses are brand new and
obtained from a local electronic shop.
The first battery pack was built from the
ex-security system's discarded batteries. They were sealed lead
acid batteries donated by a local security company,
the complete frame was designed to accommodate as many of those
lead batteries as possible,and
made of a 1/2-inch square iron tube. It is 700mm long,
250mm wide and 120mm deephere is the picture that shows the frame
layoutthe perimeter of the scooter is welded and
spray painted, then sheets of 1.2mm thick stainless steel are
riveted to the frame to create a body-like structure.
There are no lead batteries in
this scooter anymore; instead of heavy lead bricks, there are
light NI-MH batteries.
The battery pack consists of 288 nickel
metal hydride cells that were used for
mobile security radios,
the system voltage is 24 volts. In
reality, the nickel metal hydride pack is three times lighter,
smaller than the led acid battery pack, and two times more
efficient.
The control panel includes a 30V
voltmeter, speed limit switch, main power switch, and parking
brake switch (there is no need for this switch. It is just
doubling the main power switch; in reality, this number of
controls is more like a coded lock. One needs to know the
correct combination to make this scooter go.)
This 250W scooter is comfortable enough with
a 90kg rider and can reach a speed of up to 30 km/h on flat
terrain. This scooter is a perfect test bed for different
battery chemistries and configurations.