I bought an e-scooter recently with the following specifications:
Brushless permanent magnet DC motor
Rated speed: 2400 r/min
Rated Voltage: 18.5 V
Capacity: 10 Ah
Voltage: 18.5 V
Brake: Power brake, mechanic disc brake
Max speed: 15.5 mph
Max load: 176 lbs
Scooter weight: 18.04 lbs
Grade ability: 15 degree slope
The e-scooter seems to struggle to climb small hills (with 165 lbs load), it gets stuck, I would appreciate any suggestions to modify the e-scooter so it is able to climb hills.
Which is the approximated minimum motor power required for hill climbing? Any brushless DC motors recommended? Which components would be required in the modification?
Could you please give me a few options and quotation.
Thanks for your prompt response. It is a separate motor and wheel with a chain between them, please find attached a picture of the motor I am referring to.
A larger sprocket could be installed on the rear wheel to lower the gear ratio which will create more torque so the scooter can climb steeper hills.
We make custom sprockets which can be ordered on this page:
The lower gear ratio will make the scooter have a slower top speed but faster acceleration. I can check and see if we have a larger sprocket that will fit the wheel with a little more information. How many teeth does the original rear wheel sprocket have? What size tire is on the rear wheel?
I can run some gear ratio calculations to see what the top speed would be with a couple of different size larger wheel sprockets installed (65 and 80 teeth). I will need to know how many teeth the motor sprocket has in order to do the calculations?
I estimate that the top speed will be a few miles per hour less with the larger sprockets, once I know how many teeth the motor sprocket has then I can calculate and let you know for sure though.
The alternative to lowering the gear ratio and top speed would be to install a more powerful motor and controller. Trying a lower gear ratio is a much easier modification though so you may want to try that first and see how you like it before upgrading the motor and controller.
Sorry for late reply. Thanks ESP support for the calculations provided.
Hi Ravi, just for reference, for how long have you been using it and weight? in both flat and uneven terrain? I have used it with 158-165 lbs load and have had some motor shutdowns in pretty flat terrain apart from being unable to climb small hills. I received another battery this week and had the same issues. It seems to me that a larger sprocket (i.e. 80 teeth) would help to climb hills but the problem is that the e-scooter is already struggling to handle my weight in any terrain so perhaps a higher power and voltage would be required.
You are welcome Ravi. I can tell from the X7 rear clip illustration what type of wheel sprocket it uses, however I can not tell exactly what type of front sprocket it has. We have a 9 tooth d-bore sprocket for #25 chain that has an 8mm x 7mm ID. I am not sure if that would fit the X7 motor though so I would measure the ID of the old sprocket before ordering. Also in the illustration the X7 motor sprocket looks like it has a wider collar than our 9 tooth sprocket has.
Thanks Ravi for the feedback regarding the performance. Thanks to both of you for helping with information of motor sprocket and chain, getting closer to the required parts and specifications. It looks like I would need more modifications to have e-scooter performing well, will have to evaluate different options.