24v Lash Out bike @ 36v
Have followed the old Voltage forum to the "V", I'm a big fan and just recently registered cause I have a question. I just bought a used Lash Out (24v) electric bike and I have several Minimoto 36v 12ah batteries I would like to use. Can the stock (internal) controller handle the 36v? Will it shorten it's life? Can I step down the voltage (to 24v) at or near the battery before the power gets to the controller rather than change the controller? OR would that be more effort and more expensive than just replacing the controller? Lastly, Is there anyone willing to walk a non-tech person (me) through it? If answering, please try to answer all 5 questions, thanks!! :)
Other than using these nifty batteries you have, what are you trying to accomplish? More speed? More range? The Lashout has pretty impressive torque up to 19mph and then you're pretty much at the limit. I doubt more voltage would help you go much faster than that. More range might be nice, but this can be accomplished by having parallel strings still running at 24V.
Can the stock (internal) controller handle the 36v?
No. The original Lashout controller was marginal at best even at 24V.
Will it shorten it's life?
Yes. Probably to hours.
would that be more effort and more expensive than just replacing the controller
My Lashout controller was embedded in epoxy next to the motor. Replacing it would not be trivial. If you wanted to add an external controller you'd first have to get the old one out of the way.
If answering, please try to answer all 5 questions
Why would you place restrictions on people who are trying to help you?
The 24 volt motor with internal controller would fry pretty quick at 36 volts, unless you did something to it like, add forced air cooling (with an external fan see this thread for some pics http://visforvoltage.org/forum-topic/small-scooters/401-axial-blowers) or separate the controller from the motor (which is not easy) or both.
Another option if you did not want to try and modify the motor yourself is to by a Currie Bike motor that is already set up for 36 volts.
You can get the Powerpack Motor (This is a modified currie motor with an external controller).
This motor can even be used at 48 volts no problem. This is a brushless motor so if the motor that you have now is a brushed motor then you would also need to change out the throttle.
Changing the throttle is easy and you can get one here
I hope that this helps.