Mystery Motor - Missing Battery, help needed

MGully

New Member
Forgive the complete noob thread, but I bought this bike with a motor installed, but it is missing the battery. It is an unbranded 24V 500W brushless motor with chain drive. The throttle is connected and a couple of connectors hanging loose (pictured). Can anyone tell me if I just need a battery to get this running or is there any other components required?
Thanks for any suggestions

Ebike Motor.jpg
 

Ann M.

Well-Known Member
@MGully, curious setup; would you mind posting a couple of pics of the whole bike which will give us some idea of where the battery goes and what sort of throttle or pedal assist setup might be there along with another shot of that double connector head on, so we can see the pins better.
 

MGully

New Member
Thanks for your reply
There are some more pics,
The red connector has two pins I assume goes to the battery. I assume the battery was located on the vertical frame pole.
The black connector lead runs from the throttle to the motor and has this extra two black connectors with two pins on each. This is what I am curious about. Is this for the display to tell how much power is in the battery?
 

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J.R.

Well-Known Member
That looks like the motors found on Chinese electric motor scooters. It's very similar to this one:

http://www.monsterscooterparts.com/...7sLKhjNMMy5H4aSRg9cAs2ZtEpMa3V8ceQhoCMqHw_wcB

It may not be identical, but could set you on the right path. Good luck!

Edit: Typically these 24 volt scooters use 2-12 volt SLA batteries wired in series to provide 24 volts to the motor. You could purchase a 24 volt lithium-ion battery, eBay and Amazon carry them.
 
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Ann M.

Well-Known Member
Thanks for the pics; those extra wires would be for the battery gauge and lights. I agree with J.R. and figured from the start that this is a very old style of motor designed for SLA batteries. If you choose to go with a lithium pack then the battery level display will not function properly. The amount of volts between full and empty is a lot more for an SLA pack than for Lithium batteries, so the display will probably show always empty or always full.

Question: have you tested that motor & throttle to see if it they work? Don't want to see you spend $$ for batteries, etc. if the motor or controller aren't functional. Sometimes these types of bikes turn into a bit of a money pit unless you're just wanting a project :). You'll need to figure out the polarity of the wiring so you don't fry the internal controller using a test pack.
 

MGully

New Member
Took it to a local ebike workshop to test it out with two 12v SLA batteries. Changed the battery plug to the motor and wired it up and it works! The display seems to work, indicating battery charge. Still have not figured out what the other plugs are for. The top speed is not great, around 20kph. Apparently installing a smaller sprocket will increase the speed. Now to find a battery (24v not so easy to find nowadays). Thanks for your help!
 

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Trail Cruiser

Well-Known Member
24 volt sla is just two 12 volts connected in series the same way as my old Rayos electric bike.

I actually bought a spare battery from the older model (Lashout) that includes the casing. It's very heavy, almost 20 pounds.
rayos 5.jpg
 
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Trail Cruiser

Well-Known Member
Took it to a local ebike workshop to test it out with two 12v SLA batteries. Changed the battery plug to the motor and wired it up and it works! The display seems to work, indicating battery charge. Still have not figured out what the other plugs are for. The top speed is not great, around 20kph. Apparently installing a smaller sprocket will increase the speed. Now to find a battery (24v not so easy to find nowadays). Thanks for your help!
The batteries are very cheap but heavy (as all SLA batteries are). Less than 50 dollars for two 12 volts!
https://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias=aps&field-keywords=scooter+battery
The extra wire could be a brake switch, to cut off power when braking. It can also double as a power cut off (when slightly touched) to allow easy shifting.

My ebike used 12 volt 12 ah.