giant seude ebike

[robdon]

I have a Giant Suede E bike old I know but like new, i have purchased a 36v 15ah li-ion battery, and am going to fit this to the rear carrier, and connect in parallel to the wires below the bike connector.
the problem is that the connector that came with the battery is a two pin and the one on the bike is three, I have read somewhere on the forum that the third pin on the bike is for supplying 12v to the controller. if this is correct I will have to get a three pin connector, does any one know where these can be obtained, or if the two pin will be ok.
thanks robdon [/ATTACH]

 

[flecc]

That doesn't sound likely. Does it have a handlebar battery meter? If so, on Giant e-bikes the middle connector is usually used for feeding the battery content level to the handlebar battery meter. Another set of connections is used for charging since the original NiMh battery has a temperature sensing connection for the charger, hence the number of possible pin positions on the platform.

If it's got a handlebar meter you may find it will run ok with just the two current connections.

 

[robdon]

That doesn't sound likely. Does it have a handlebar battery meter? If so, on Giant e-bikes the middle connector is usually used for feeding the battery content level to the handlebar battery meter. Another set of connections is used for charging since the original NiMh battery has a temperature sensing connection for the charger, hence the number of possible pin positions on the platform.

If it's got a handlebar meter you may find it will run ok with just the two current connections.

 

[robdon]

thanks for that flecc , yes it does have a handlebar battery meter.
robdon

 

[flecc]

thanks for that flecc , yes it does have a handlebar battery meter.
robdon

That's likely to be the answer then, positive and negative connections with the meter fed from the centre connection. The controller is usually either directly connected to the supply or via an on/offswitch.

 

[robdon]

next problem : I was testing the new battery, and no power at the bottom.
Took the top and bottom off the battery carefully, all the wiring seemed ok, screwed the fuse holder top out this was under the handle, and lo and behold no fuse, unbelievable in a new battery.
question what amp fuse do I require for 36 volt 15 ah battery, I estimate it is a glass fuse about 18mm x 5mm
thanks for any help,
ROB

 

[flecc]

A 20 amp fuse will be adequate on the Suede Rob.

There are 20mm long ones on ebay here, probably the ones you want.http://www.ebay.co.uk/bhp/20-amp-glass-fuse

 

[robdon]

A 20 amp fuse will be adequate on the Suede Rob.

There are 20mm long ones on ebay here, probably the ones you want.http://www.ebay.co.uk/bhp/20-amp-glass-fuse

thanks for that

 

[robdon]

I have tried a 20mm x 5mm in the fuse holder and it is too long
, looks like it should be about 10mm long x 5mm, has anyone heard of a fuse that length cannot find any on ebay , amazon, or maplins, the fuse holder is a screw in under the carrying handle.
ROB

 

[flecc]

A dodge I've used when an odd size crops up is to bridge the ends with fuse wire soldered on Rob, works fine if not too much solder is used. Maplin have some on this link, you could use a strand of 15 Amp with one of 5 Amp.

If you haven't got a vice or other way holding the tiny fuse still while soldering, an elastic band on pliers can do the trick as shown here:

 

[robdon]

do you mean solder the fuse wire onto the cap then push and twist the cap into the holder
ROB

 

[flecc]

Yes, solder very thinly, virtually just a tinning coat and push the fuse into the cap end connection, then screw in. It just becomes a tighter fit. It's worked for me a few times.

Of course, if one of the end caps on the glass tube is loose enough to come off, you can solder a new fuse internally by desoldering the end caps and threading through the wires. I was lucky enough to be able to do that on one fuse.

 

[robdon]

but I have not got a fuse

 

[flecc]

Ah, that's a problem, I'd forgotten that the holder was empty and was thinking in terms of a blown fuse. The only options I can think of are to buy one of the wrong value 10 mm fuses and solder that, or bridge the fuse holder connections and install a popular size inline fuse holder either internally or in the external wiring. I'd use that second option for convenience.

The 10 mm fuses I've seen online are 3.6 mm diameter so can easily take the extra thickness of solder, but have end wires which will have to be cut off.

 

[robdon]

thanks for that flecc, I will get some of those and do as you suggest
ROB