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I need some advice on my motor and battery choice


#1

Hello my name is Jouke.
i’m kinda new to this electric skateboard thing but i would like to build one. I have searched a lott of forums and have red a lott of topics but i still have some questions.

Some information that might help with answering the questions: i’m planning on using the vesc i’m planning on using this board http://www.enertionboards.com/electric-skateboard-parts/carbon-fiber-electric-skateboard-deck/ and these trucks wheels belts etc, http://www.enertionboards.com/diy-electric-skateboard-kits/mono-drive-mechanical-kit

Question 1, The motor. I’m still not sure what kind of motor i should buy I weigh 73 kg (161 pounds) I live in a really really flat area (The Netherlands) and I would like to go at least 35kmph (22mph) top speed (can be more, I dont mind) I would like to have some torque (doesn’t have to be insane but i would like to have atleast some :wink: ). and I would like to buy a second motor later on and mount it on there as well so i have a dual drive instead of a single. So the motor length would need to be something close to 55 mm. I hope you have enough information to recommend me a good motor. :grin:

Question 2, the battery, I also don’t really know what battery I should buy. Because i’m going to buy this board http://www.enertionboards.com/electric-skateboard-parts/carbon-fiber-electric-skateboard-deck/ but two 6s batteries wired in series (so i have 12s) will not fit in there because the hight of the space in the board is only 28 mm. So i’m asking you what should I do with my battery problem. It has to fit in the board it has to atleast have 12s and it has to drive me more than 14 km (9miles)

I hope you guys can help me.
thanks for reading.


#2

That deck works best with the space cell battery, but it sounds like you want a raptor. 1 motor sounds like enough for your needs. I’d allocate the funds to batteries over 2 motors.


#3

I think the space cell battery is way overpriced. 320 euros plus shipping costs and import fee’s.

I was thinking about making my own battery pack with 30 Samsung 25R Cells in the same configuration as the space cell. 3 parallel groups of 10 cells in series. You would get the same specs as the space cell for 160 euros plus shipping and import fee’s.

Is that a good idea ore just straight up stupid?

Thanks for the quick reply btw I really appreciate it.


#4

I don’t think it’s so overpriced, consider the price of a bms, charger, wires etc, up to you though.


#5

That’s true, I haven’t thought about that. Chargers are not cheap

Do you have a recommendation for a good motor that fits everything?


#6

Ollin, DIY electric skateboard have cheap and good motors. Enertion’s motors are expensive IMO. HobbyKing SK3s are great as well.


#7

Do you know if this motor will work for the expectations I had in mind http://diyelectricskateboard.com/diy-electric-skateboard-kits-parts/electric-skateboard-motor-5055-190kv/

On the bottom on the page it said it can run on 6s battery. So I thought if I put two 3s batteries in series it would work to its fullest potential. Right?


#8

Definitely get a 215-245kv motor. On 6s, 190kv = 23kmh at 15/36 gearing.


#9

How fast will this thing let me go? http://www.hobbyking.com/mobile/viewproduct.asp?idproduct=18126


#10

Use this calculator: calc.esk8.it


#11

Also, don’t get a 50mm motor for single drive. Get this bad boy: http://www.hobbyking.com/hobbyking/store/__18128__Turnigy_Aerodrive_SK3_6364_245kv_Brushless_Outrunner_Motor.html


#12

Thanks!
Great, now I only have to find a solution to my battery problem. I don’t really want to spend 330 euros plus shipping and import fee’s for a battery


#13

If you your decent at soldering you can look into some 18650 batteries. They are a much reliable option.


#14

How do you charge them if you have 10 in series and 3 groups in parallel?


#15

http://www.batterysupports.com/liion-lipo-42v-for-36v-37v-10s-2a-wall-socket-battery-charger-p-364.html


#16

Yeah that link has a great charger. It’s laptop style. Kind of like boosted’s


#17

So if i put the batteries in this formation and put this http://www.ebay.com/itm/10pcs-DC-Power-Supply-Jack-Socket-Female-Panel-Mount-Connector-5-5-x-2-1mm-EF-/401119290150 at the red circle and plug in this http://www.batterysupports.com/liion-lipo-42v-for-36v-37v-10s-2a-wall-socket-battery-charger-p-364.html charger. it would all charge and work just fine?