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Inexpensive Electric motorized bicycle parts.
Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Electric Bicycles forum. An inexpensive 600 watt curry motor.
Allelectronics site has a lot of stuff . motor controller,throttle chains, and belt driven ...  | | 
09-11-2009, 07:50 AM
|  | minor bike philosopher | | Join Date: Jan 2008 Location: north carolina
Posts: 5,425
| |  Re: Inexpensive Electric motorized bicycle parts.
I have three of those motors.... My controller is from tnc. I have a 800watt 36volt on the way from tnc now for my latest rhino bike. It is 34bucks including shipping... throttles are also from tnc... i think they are about 81/2 bucks + shipping. My drive is a scooter wheel form a 350 watt scooter running the 600 watt motor at 900 watts. Zips right along.
I'm going to take a look at the batteries. |
09-11-2009, 08:04 AM
| | minor bike philosopher | | Join Date: Jan 2008 Location: north carolina
Posts: 5,425
| | Re: Inexpensive Electric motorized bicycle parts.
now my math maybe all screwy but... it would take 30 batteries to get 36v with 2.2amp hours of current. at 6 batteries per 12ahs current would be 180 batteries for a 12hour 36v battery pack. My bike runs poorly at 36v it runs best at 39v and I don't know the drain rate for Nicad but it seems that on my photo batteries it was a little faster then sla but I could easily be remembering it wrong.
I would think to be safe you would want about 200 battery pack for a 12 hour run time. I would hate to solder that many batteries together I am not that good with an iron. But I think that a lith pack is soldered by hand as well.
I think other than the batteries the other components are spot on for value. The batteries I just don't know about. I do know we need a better battery than the sla. The weight power ratio sucks. The cost per lifetime of the battery probably isn't very good either. I just might try a wet cell deep charge battery next. I pull them on a trailer so it shouldn't be a big deal about the weight or the acid. I need to do research and tests on batteries when I get this bike I'm working on now finished.
Again my math may be wrong but it looks like the claim is about 45mp, that's a bit hard to believe. The way i did the math is .75 miles per minute.. or 45mph. That would out perform most of the gasoline bikes on this site. Plus 45mph on a bike is just plain scary.
Last edited by deacon : 09-11-2009 at 10:29 AM.
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09-11-2009, 11:39 AM
|  | Motorized Bicycle Elite Member | | Join Date: Feb 2008
Posts: 119
| | Re: Inexpensive Electric motorized bicycle parts.
Quote:
Originally Posted by spad4me  | I find $30+ pretty steep for a throttle. It's even more than the motor. The motor is a good price at $28 but I would find it better for me personally to go with Monster scooter parts because they sell the motors as a bundle with the controller and throttle. |
09-11-2009, 12:36 PM
| | Motorized Bicycle Elite Member | | Join Date: Feb 2008
Posts: 119
| | Re: Inexpensive Electric motorized bicycle parts.
Just soldering all those batteries together alone would drive me off, plus the fact that I've had no success with nicd batteries. Every Black and Decker battery pack I've had has failed on me. They are $40 each at wally world. Every time I've bought one for my cordless drill, if it sat a few months and I needed to use it, it was already dead and wouldn't charge. It's almost as cheap to buy a new drill with battery. And I've heard the lifepo batteries can up and fail at any time and if you drain them past a certain threshold, they're ruined, so I'll never invest in those. I'll just keep on using SLA until all those miracle batteries come along that they keep promising us. |
09-11-2009, 03:31 PM
| | minor bike philosopher | | Join Date: Jan 2008 Location: north carolina
Posts: 5,425
| | Re: Inexpensive Electric motorized bicycle parts.
I have enough problems hooking three batteries together with a soldering iron.
That motor will take 36volts easily which really makes it strong. I have one 24v controller that works pretty well on 36v. I had one that worked with a smaller motor but ran like crap with this one . It is almost double the watts though. I tried a cheap 24v 500watt controller but it burned up immediately. Like I said earlier I have a 36v 800watt controller on the way now. It should do the trick.
The battery thing is the bane of my ebike existence. I really want to find a lighter battery that is as solid as a sla battery. With sla you don't need any electronic circuits to protect it. You also don't have to worry too much about it coming apart from bike vibrations. I would worry about that with the Lith phos. I would love to find a low cost deep cycle 25ah or so battery. It's the cost and the weight thing that bothers me. I roughly figure I get about half a mile per ah if I ride it like a motorbike not pedal assist. I would love to have 10 miles range with a little pad built in.
I have two battery packs now. One I use and then one on the charger. right now I have a 7ah pack and a 12ah pack. I think that when the 7ah pack give up on me, I will add a second 12ah pack so that I can use them in parallel and have a 24ah pack should I want to go somewhere other than to a neighborhood store. |
09-11-2009, 03:58 PM
|  | Motorized Bicycle Elite Member | | Join Date: Apr 2008 Location: Albuquerque
Posts: 1,086
| | Re: Inexpensive Electric motorized bicycle parts.
A trick someone showed me on the cordless batteries when they won't take a charge. Give it one jolt on a car charger at 40 amps then stick it in the normal charger hope that helps. Sorta like using the paddles in ER..
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09-11-2009, 06:09 PM
|  | Motorized Bicycle Elite Member | | Join Date: Jan 2008 Location: Arizona Bullhead
Posts: 361
| | Re: Inexpensive Electric motorized bicycle parts.
The loose nicad batteries are a solution that I like.
They are installed into a sealed pvc tube ten batteries deep with a strong spring and a threaded cap . Think flashlight.
When one goes bad you don't need to replace the whole thing just find the bad cell.
Nicads will discharge at 10C Ten times normal they will last a long time in the desert heat 120 f.
Not soldered just using spring tension in a pvc tube with a threaded cap.
I am thinking of 24 ten cell tubes.
This battery is on another channel. search for an article about rewinding brushed motors. 61 pages long it goes on and on.
The Allelectronics 36 volt spring return throttle is $12.75 TWIST GRIP THROTTLE FOR ELECTRIC BIKE/SCOOTER, 36V | AllElectronics.com
The other throttle is what I consider heavy duty. it normally sells for $50.00
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Last edited by spad4me : 09-11-2009 at 07:21 PM.
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09-11-2009, 06:34 PM
| | minor bike philosopher | | Join Date: Jan 2008 Location: north carolina
Posts: 5,425
| | Re: Inexpensive Electric motorized bicycle parts.
if they are using a controller the power to the throttle is 4volts or so. I don't know if there is a throttle that is just a potentiometer. There might be.
The all elec one is the same as the 8.50 one at tnc. I would buy them as an added unit to save shipping at either place. The throttle might have come from a 36v set up but they are the same on 24 or 36 as far as I know because they have only the 4v or so on them.
I like the pvc idea. I have used index cards to make battery tubes with inner tube strips for tension. Good idea though
Last edited by deacon : 09-11-2009 at 06:39 PM.
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09-11-2009, 07:16 PM
| | Motorized Bicycle Elite Member | | Join Date: Jan 2008 Location: Arizona Bullhead
Posts: 361
| | Re: Inexpensive Electric motorized bicycle parts.
I was thinking of mounting 12 tubes on each side of the bicycle either low at the rear wheel, or on each side of the diamond just on top of the front chainring.
Your inner tube idea may be easier than the springs.
Slit the side of the tube 1 inch on each side to enable the inner tube to really grab the batteries.
The pipe would be longer than ten batteries , I am thinking a wooden plug , then a penny soldered to a 10 gage wire then the batteries then another penny soldered to a ten gage wire then another wooden plug held under tension buy an old inner tube. This assembly is stabilized by being inside a tube.
This would give me a nice range.
The tubes I have described will produce 12 volts per tube with ten 1.2 volt nicad batteries..
The tubes can be longer, requiring more batteries per tube , for higher voltages per tube.
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Last edited by spad4me : 09-11-2009 at 07:44 PM.
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