RC-Monster Forums - View Single Post - E-Bike System

mistercrash · 12:48 PM

1350 km now on my scooter and the only thing that gave me problems was the speedometer cable broke. They changed it immediately with no charge. I re-positioned the second battery in front of the main one under the seat compartment so I have plenty of storage under the seat now. I tested the range one day and I barely got 45 km from the 48V 34ah SLAs I'm running now. I was disappointed in that, I was hoping for at least 60 km.
I joined Endless Sphere to get ideas on what I could do to improve the performance. There's not much that can be done with what's on the scooter now but I did build up the shunts with plenty of tin which gave a bit more grunt going uphill but no change on top speed. Next step would be to rewire the batteries with 8 gauge wires and the phase wires with 10 gauge. No small task and I will wait to do this when I won't be using the scooter on a daily basis which will be when there's snow in the streets.
Other then that, not much I can do unless I invest a couple grand to change the motor, the controller and the batteries. The batteries being the most expensive of the upgrades. This is what I'm thinking of.

Controller
http://kellycontroller.com/kbl481012...egen-p-54.html

Motor (high torque model)
http://kellycontroller.com/hub-motor...ake-p-162.html

Batteries (two of them to have 60 amps)
http://www.pingbattery.com/servlet/t...LiFePO4/Detail

I plan on getting a first LiFePO4 battery at the end of October when the weather gets colder. SLAs don't do well in the cold. Right there this battery should give much better performance then the SLAs, longer range and it weighs 50 pounds less.

If I get the funds to upgrade with a second LiFePO4, a new controller and a 1500 watts high torque motor, I should be getting top speeds of close to 55 km/h which is enough to keep up with the traffic but not enough to get speeding tickets. The main advantage will be in torque. Faster starts off the line and sustained speeds going uphill. The system could run on just one LiFePO4 I linked above but I learned on Endless Sphere that having more battery capacity than you have motor as it relates to KW puts less strain on the battery.

	(#75)
mistercrash Guelph, Canada, eh! Offline Posts: 1,083 Join Date: Sep 2007 Location: Guelph, Ontario, Canada	08.19.2011, 12:43 PM 1350 km now on my scooter and the only thing that gave me problems was the speedometer cable broke. They changed it immediately with no charge. I re-positioned the second battery in front of the main one under the seat compartment so I have plenty of storage under the seat now. I tested the range one day and I barely got 45 km from the 48V 34ah SLAs I'm running now. I was disappointed in that, I was hoping for at least 60 km. I joined Endless Sphere to get ideas on what I could do to improve the performance. There's not much that can be done with what's on the scooter now but I did build up the shunts with plenty of tin which gave a bit more grunt going uphill but no change on top speed. Next step would be to rewire the batteries with 8 gauge wires and the phase wires with 10 gauge. No small task and I will wait to do this when I won't be using the scooter on a daily basis which will be when there's snow in the streets. Other then that, not much I can do unless I invest a couple grand to change the motor, the controller and the batteries. The batteries being the most expensive of the upgrades. This is what I'm thinking of. Controller http://kellycontroller.com/kbl481012...egen-p-54.html Motor (high torque model) http://kellycontroller.com/hub-motor...ake-p-162.html Batteries (two of them to have 60 amps) http://www.pingbattery.com/servlet/t...LiFePO4/Detail I plan on getting a first LiFePO4 battery at the end of October when the weather gets colder. SLAs don't do well in the cold. Right there this battery should give much better performance then the SLAs, longer range and it weighs 50 pounds less. If I get the funds to upgrade with a second LiFePO4, a new controller and a 1500 watts high torque motor, I should be getting top speeds of close to 55 km/h which is enough to keep up with the traffic but not enough to get speeding tickets. The main advantage will be in torque. Faster starts off the line and sustained speeds going uphill. The system could run on just one LiFePO4 I linked above but I learned on Endless Sphere that having more battery capacity than you have motor as it relates to KW puts less strain on the battery. No brain, no headaches. Last edited by mistercrash; 08.19.2011 at 12:48 PM.