an electric skateboard consists of the following components:
battery ESC motor Trucks Board wheels
Before you buy an electric skateboard you should inform yourself about how the components interact with each other.
we will go through the first three components which are directly connected with each other by using an example.
13s4p battery pack
Samsung 50E 21700 Li-ion cells
continous discharge: 15A
capacity per cell: 5000mAh = 5Ah
voltage per cell: 3,6V
13s4p: 13 cells connected in series; 4 cells connected parallel
seriell cells increase voltage:
parallel cells increase capacity and continous discharge:
maximum watt this battery pack could provide:
(able to handle a maximum of 30A)
maximum watt that will actually reach the motors:
2x 3500W Motors
the motors could each run on 3500W due to their specifications so 7000W in total. The battery would be able to deliver 2808W in total but because of the 30A ESC the motors only run on 1404W in total, so each motor runs on 702W.
Sometimes manufacturer advertise with huge power specifications. However often these huge numbers are related to only one component of the complete Product. Please inform yourself about the battery cells and the ESC.
Different kinds of motors:
Hub motors : completely stealth, quiet, not much torque, poor damping because of the thin reels around the motors.
Belt motors : obvious, loud, much torque, good damping because the full wheel can be used, ability to switch to AT wheels.
Direct Drive : stealther than belt; not as stealth as the hub motor, quiet, mostly more torque then hub but less than belt, good damping because the full wheel can be used.
Different kinds of trucks:
DKP : Double King Pin, very nice steering, getting dangerous on speeds above 45km/h
TKP : Traditional King Pin, less flexible steering than DKP , stable on speeds above 45km/h
RKP : Reverse Kingpin, more flexible steering than TKP, dangerous on speeds above 45km/h
Generally you can say the bigger the wheels the more energy and torque will be lost because the engine needs more power to spin a bigger wheel than a smaller one, but you can reach higher speeds with bigger wheels.
The shape of a wheel can be flat or rounded. A flat wheel has a bigger contact surface to the ground which is increasing the amount of grip. A rounded wheel can be dangerous on higher speeds but it is the better choice if you have streets with bad pavements.
Different kinds of wheels:
Air filled: much grip (depends on how much air is in the wheel), big (usually 150mm+), good for offroad and street, good damping
Polyurethane: good grip (depends on hardness), size between 97-120mm, goes with Kegel or ABEC adapter
Rubber: much grip, size between 100-115mm, higher battery consumption because of higher rolling resistance, good damping, wears off faster
pretty much stiff which gives you more control but less damping
these boards usually have flex. Can go up from a little to a lot
The more flex it has the better the damping will be but it will also get more unstable on high speeds