No difference between 36v to 48v!!!

[fresh101]

Hello guys, I got a question, i tried my scooter yesterday @ 36v using SLA battery and it felt strong doing 18Mph, but today when i tried my scooter with upgraded battery @ 48v with LiFePO4 it felt the same or weaker. Can the wires thickness of my new setup be the cause of its performance? Ex. When i used the 36v setup, i connected the battery pack using 10ga wire from battery to controller and 10ga wire from controller to motor. With the 48v setup, i connected the battery pack using 10ga wire to the switch and then i used a 18ga wire from switch to controller and 10ga from controller to motor.

Do you think the wire gauge can make it not feel any difference or worse? Thanks in advance for the help.

 

[Camn]

Yes- you should stick to using one gauge of wire for all power connections. How many watts is your motor? A smaller gauge wire acts as a resistor, limiting the current to the motor. One way to tell your wire is too small is if it heats up during use.

It could also have something to do with the size of the battery- how many amp hours is the new battery? Old one?

 

[fresh101]

Thanks for response.

The motor is a Currie 36v 1000 watts. I am upgrading everything of a Schwinn S500.
The old battery that felt good at 36v was 3 x 12v 7Ah, the new battery is 48v 15Ah LiFePO4 pack (Lipo). Can the switch also restrict flow? With the SLA battery i never used the switch.

EDIT: I just found out that the switch is rated at 24vdc and 15 Amps.

Thanks in advance

 

[Camn]

Ya that would make sense. Try a bigger switch first.

 

[fresh101]

I finally hit 30 Mph on a electric stand up scooter, it's scary and super fast, i love it. I believe there is more speed available as it has plenty of torque right now. I am using the 11 tooth motor and 55 tooth rear, and i weight 230Lbs.

 

[fresh101]

Hey guys, by any chance does anyone know a wheel that will fit a Schwinn S500 scoot with disc brakes, I need to replace my S500 rear wheel from drum brakes. I've been looking and calling different supplier, to see what rear assembly will fit based on dimensions with no luck. I am thinking of getting something that direct fit and then weld mounting bracket to mount the caliper. The scooter now hits 39 Mph on Saturday with no stopping power even after having front bike brakes installed. Thanks in advance for the help

 

[landuse]

The scooter now hits 39 Mph on Saturday with no stopping power even after having front bike brakes installed. Thanks in advance for the help

When you say front bike brakes, do you mean bicycle or motorbike. If you mean bicycle, then there is no way they are ever going to help. If you mean motorbike, then you have installed them incorrectly or not bled them. Hydraulic brakes work very well.

 

[fresh101]

They are bicycle brakes, i put them on to help the band brake, something better than nothing. I am trying to put some bicycle disc brakes now, but i cant figure out what fits.

 

[landuse]

They are bicycle brakes, i put them on to help the band brake, something better than nothing. I am trying to put some bicycle disc brakes now, but i cant figure out what fits.

I am not too sure if you are going to be happy with any sort of components off a bicycle. They are not made for the forces that a kart can generate.

If you have them though, give it a try and see how they work

 

[fresh101]

Hello Landuse, it is not for a "kart", it's for a Schwinn S500 electric scooter. I upgrade the heck out of it, over volting to 48v using LiFePO4 15Ah pack, 1000 watts motor spinning at 3800 with 15T motor sprocket and 55T rear axle, pushing my 230lbs body to 38Mph. It originally comes with band brakes but after 2 days of run the pads are worn out. I want to upgrade the brakes to disc brakes and i mentioned bicycle disc brakes as they are smaller to fit within the wheel and frame. I am trying to figure out what wheel assembly will fit with no modifications to the frame and then i will fabricate a mounting plate for the caliper. Thanks for your input

 

[landuse]

Hello Landuse, it is not for a "kart", it's for a Schwinn S500 electric scooter. I upgrade the heck out of it, over volting to 48v using LiFePO4 15Ah pack, 1000 watts motor spinning at 3800 with 15T motor sprocket and 55T rear axle, pushing my 230lbs body to 38Mph. It originally comes with band brakes but after 2 days of run the pads are worn out. I want to upgrade the brakes to disc brakes and i mentioned bicycle disc brakes as they are smaller to fit within the wheel and frame. I am trying to figure out what wheel assembly will fit with no modifications to the frame and then i will fabricate a mounting plate for the caliper. Thanks for your input

Sorry, I had forgotten what you were actually doing.

 

[mysteryboy28]

lol.

hey fresh101, post some pics and videos during your progress. we like to see them, and it helps up put your project into perspective.

 

[mymumisaman]

Why don't you get hold of some pushbike hydrholic brake's? They should fit straight on if you already have a pushbike disk brake, failing that why not set the electric motor up to do the braking for you?,

 

[fresh101]

lol.

hey fresh101, post some pics and videos during your progress. we like to see them, and it helps up put your project into perspective.

First pic is of my first project with scooter. I decided to stretch it 12", so I can ride it with my girlfriend on the back. The other picture shows the stock Schwinn S500 and then when I was installing the 1000 watts motor and a 55 tooths sprocket.



Video of me riding the stretched Razor E300 scooter:

http://s1157.photobucket.com/user/Xtream-DJs/media/IMG_0272.mp4.html

 

[fresh101]

The is a picture of the battery compartment.



This are some pictures of the controller I am going to use on my project. Kelly KDS48200E Mini Brushed Controller





Some of the connections I did to it.





Video after the upgraded motor and running at 48v with Sealed Lead Acid battery.

http://s1157.photobucket.com/user/Xtream-DJs/media/IMG_0409.mp4.html

Here I received my LiFePO4 Lithium Ion cells and balancing them before building my pack.





Here I started building my battery pack to put on 24v 15Ah in the original battery compartment and another 24v 15Ah in a lunch bag on the back, making the full 48v 15Ah LiFePO4 pack.









This is how it's going to look inside the battery compartment.



This is the battery pack completed outside of scooter, needing heat shrink wrap.

 

[fresh101]

This are temp mounting location while I finish tweaking the controller and upgrading the brake system.





Here I have upgraded the seat for a more comfortable and springy feel as the scooter does not have any shocks (Huge difference over stock).

 

[fresh101]

This is a picture of my busted lip. The scooter goes with me on it 28Mph and I weight 230 Lbs and with huge torque. Do to the torque that it had, I by mistake hit the throttle at full blast causing the scooter to lift up doing a wheelie and me falling off. My lip got scraped with the asphalt in a parking lot when I felt from it.

 

[fresh101]

Why don't you get hold of some pushbike hydrholic brake's? They should fit straight on if you already have a pushbike disk brake, failing that why not set the electric motor up to do the braking for you?,

Hey Mymumisaman, how would I make the motor stop for me? I might do the hydraulic brakes, but I am holding on the brake upgrades because I might have a different scooter that might be the new project and my baby. The new scooter that I might obtain tomorrow has dual disc brakes, front and back and might switched them for hydraulics if they do not work correctly. If this take place I will be taking the battery pack of my current S500 scoot and swapping it to the new one.

 

[fresh101]

Hello Guys, can someone help me locate some foot pegs to put on my Schwinn S500? Thanks