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Apart from selling electric bike kits, I do quite a bit
of design and build. I have sourced a range of parts that
I have tested and use in my own developments, so I have
put together the following catalogue that will help you.
Bull Electrical (www.bullnet.co.uk)
has a huge range of bits and pieces, as well. I particularly
like their Fly Zapper - the best fun you can have with a
pair of double A's (well, nearly)!!!
Batteries: the 'workhorse' batteries are
still sealed lead-acid (SLA) despite their weight. They
(and their chargers) are a lot cheaper than NiCd or NiMh.
NiCd's however are gaining ground - being lighter than SLA
and with better voltage/time characteristics. Despite their
memory-effect, they are still preferred for electric bikes
over NiMh. I am watching the LiIon market: 10 A/hr cells
are available, but at £12/cell they are still pricey
and their long-term performance yet to be proved. For further
reading, checkout..
Reference |
Price |
Type |
Voltage |
Capacity |
Weight |
Size |
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Sealed Lead Acid |
12V |
4.5 A/hr |
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Sealed Lead Acid |
12V |
7.5 A/hr |
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Sealed Lead Acid |
12V |
14 A/hr |
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Sealed Lead Acid |
12V |
18 A/hr |
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£8 |
NiCd |
1.2V |
7 A/hr |
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'F' Cell |
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£15 |
SLA 'Voltmeter' |
24V |
- |
- |
5 LED |
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£15 |
SLA 'Voltmeter' |
36V |
- |
- |
5 LED |
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£2.50 |
Small case |
- |
- |
- |
Black ABS drilled with mounting saddle |
Chargers: SLA chargers are constant-voltage,
while NiCd (and NiMh) are constant-current. They monitor
the charge current/output voltage and indicate when charging
is complete. Laptop computer technology
Reference |
Price |
Type |
Voltage |
Current |
Features |
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£45 |
SLA |
24V |
2 Amp |
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£75 |
SLA |
24V |
4 Amp |
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£35 |
SLA |
36V |
1.5 Amp |
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£50 |
SLA |
36V |
2 Amp |
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£65 |
NiCd |
24V |
0.6A |
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electro-drive spares: All the major parts
(and some of the minor bits as well) are available as spares.
Reference |
Price |
Item |
Details |
| |
£145 |
Motor |
original - BMC MAC large fins |
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£90 |
Battery Pack |
original |
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£45 |
Throttle |
original - includes mounting hardware & cable |
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£80 |
Motor Drive plate assembly |
original - includes chain, tensioner & all fittings |
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£50 |
Charger |
original - 1.5 Amp |
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£12 |
Drive chain |
includes spring link |
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£8 |
Tensioner |
original - includes bolt |
Connectors: Probably the least reliable
part of an electric bike are the connectors. Water and electrics
don't mix and 'weatherproof' connecors are large and difficult
the plug/unplug frequently. I have chosen some connectors
that don't need expensive crimping tools.
Reference |
Price |
Description |
Type |
Rating |
Application |
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Ph Plug |
3 Male |
- |
Chargers |
Plastic. Simple to fit (solder). Has
strain relief |
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Ph Socket |
3 Male |
- |
Chargers |
Plastic |
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Faston term. |
1 Fem |
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Power/Sig |
crimp/solder |
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Faston term. |
1 Male |
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Power |
crimp/solder |
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Faston housing |
2 Male |
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Power |
White plastic |
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" |
3 Male |
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Power |
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" |
4 Male |
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Power |
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" |
6 Male |
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Power |
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" |
8 Male |
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Power |
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" |
2 Fem. |
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Power |
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" |
3 Fem. |
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Power |
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" |
4 Fem. |
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Power |
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" |
6 Fem. |
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Power |
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" |
8 Fem. |
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Power |
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Neutrik |
2 Male |
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Power |
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Neutrik |
4 Male |
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Power |
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Neutrik |
4 Fem |
40 A |
Power |
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3 Male |
40 A |
Sig |
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3 Fem |
40 A |
Sig |
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Boot |
Cable: The range of cable needed is fairly
small and for higher currents domestic stranded cable is
usually OK. Heatshrink tube is invaluable for weatherproofing
and making a tidy job. If you build model aircraft, you
will already have a heat gun. Use a paint-stripping gun
with care!
Reference |
Price |
Description |
Type |
Rating |
Features |
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Heatshrink |
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Switches: I generally use toggle switches
for the power switch for my kits - they have a good rating
and can be weatherproofed with a simple rubber cover
Reference |
Price |
Description |
Type |
Rating |
Application |
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Toggle |
2P |
10/20A |
Power/Sig |
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Toggle Boot |
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Weatherproof |
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Cases:
Reference |
Price |
Description |
Size |
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Motors:
Reference |
Price |
Description |
Type |
Rating |
Speed |
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Lighting: With all that power on board,
it seems crazy to use low wattage torch bulbs to see and
be seen - the typical cycle light dissipates just 0.7 W,
so even a 5W halogen lamp is a major improvement. NB These
are not BSI approved so must not be used as a sole lighting
system. Also they have a 18 degree solid angle beam, so
they must be mounted so they don't dazzle drivers. The B-Seen101
however uses the same lamps and is BSI approved when installed
as described.
Reference |
Price |
Description |
Type |
Rating |
|
| |
£35 |
Complete 12V halogen light assembly |
|
5-20W (one price) |
includes mounting parts and switch box with 2m wire
tail. |
| |
£60 |
24V halogen light assembly (pair of 12V lights sderies-wired) |
|
5-20W (one price) |
|
| |
£25 |
Lamp module (less lamp) |
- |
10W |
Rubber cover, 10cm wire tail, mounting
saddle with adjustable zip tie |
| |
£4 |
Halogen lamp (sealed, clear) |
MR16 |
6V 5W |
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£4 |
Halogen lamp (sealed, clear) |
MR16 |
12V 5W |
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£4 |
Halogen lamp (sealed, clear) |
MR16 |
12V 10W |
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£4 |
Halogen lamp (sealed, clear) |
MR16 |
12V 20W |
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£8 |
ceramic lamp base |
MR16 |
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2 hole mount |
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£8 |
switch box w/switch |
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10A |
w/proof toggle, black ABS box with
mounting saddle and adjustable zip tie |
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£75 |
B-Seen 101 |
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Fixings: To hold everything together, you will need ..
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