Urban/ montain board - samsung 30Q 10s5p - FOC BOX - OVERION 130 KV

That sucks. Maybe you can find somebody local that will loan you some Motors to test with?

1 Like

i have a 190kv but i need to remove it from an other build and i dont want that. especially that it have a 10mm shaft insted of the 8mm once i have with this build

1 Like

Looks like you will have to buy new motors then. Sucks brother.

or vesc 6 witch i dont have money for and also and mainly not the place to integrate on this build

or I buy two vesc old generation :s as you sayd It totally suck

1 Like

did you do the graphics on the board looks class

no the 95 comp mbs were like that

1 Like

I found were the problem was and it was certainly not the one i expected. Yesterday night i test the voltage of my battery and it was at 31.5v !!! :fearful:

That lead me to an other question; how is it possible to lose so many volts with a battery pack of 15Amp without using it? do you have any idea? is it possible that there is something in my build that uses electricity without percept it?

I received the cell from NKON at 3.5V per unit and i certainly not expected that it would decrease so fast since I only did some few tests and settings and since the first time I tried to ride it it were going at max 7km/h !!! As someone said my grand mother could go faster by bike but at this speed even by walking she wouldnā€™t have any difficulties to over pass me :laughing:

Or maybe when weld the battery pack??? but i think i tested it after i finished it to be sure that the balance wires were ok :confused:

in conclusion I charged the battery this morning and it goes perfecly now. @Eboosted It is completly mad :imp: even with the +65/-65 motor max and 40/-12 batt max min > for the motor max 90A and batt max 50A I will wait to be used with that power before to upgrade it but thanks for your precious help. Right now I have the feeling that it will snach my leg when i press the trigger :yum:

torque and speed are there but i need to programise the braking curve because iā€™m in stress to brake so itā€™s strong ^^

Nice build!

35.4V is at the low end of 10S and the voltage decreases very fast at this point. Also the FOCBOXes have probably reduced the power due to battery cutoff settings. Below 36V there is not much power leftā€¦ I killed my 10S 10AhLipo because I forgot to switch off my board. It decreased from 35V to 9V within 28 hours :astonished:

Try to lower the max brake to 30-40A on each FOCBOX, that should help and is what I do.

1 Like

ok so just the fact to let your vesc open you think it can decrease the battery voltage at this point! good to know i will check my other board that i didnā€™t used since months :wink:

the thing is that the last time on the first build i did it was with one vesc+ 1x 190 kv motor and a battery pack of 10s3p samsung 30q 9Amp. when i finished to build it i could make 5-6km before the first charge

This time i use a 10s 5P with 15amp so I thought that just programise it would not use as much electricity as my first build ā€¦

I will check regularly the volt to be sure that there is no loss in the build (focbox, antispark, fuse??? ) let us hope that it is normal and that my focbox used all the energy

1 Like

with a vesc connected? R.I.P. battery :skull_crossbones: or do you use a BMS for discharge?

Was your first build a longboard? Because with a MTB you only get about 50% range compared to longboard (with same battery) due to rolling resistance. But 5-6km with 10s3p sounds not enough, thatā€™s strange.

On my MTB with 10s 10Ah Lipo, dual 6364 motors, 8" tires and 15/66 pulleys I got about 20km range.

I used it one month ago I hope it is not too late I will check tomorrow

It is a full carbon handmade board with a 10s3p but the 6km was just after I finished it with 35v. If I charge it to the full (42v) Iā€™m doing 25-30km :slight_smile:

I will open a post with it when I have time

1 Like

Wrong

Lipos and 18650 are different.


35V is roughly 35% charged which is just under the recommended 40% storage. 31V is roughly 10-15%

If @MDK has not charged his batteries since he got them then all the testing and such discharged the batteries to where they are now.


The lack of power is due to your vesc settings. Your low voltage start and end are probably set up too high for your battery. For Lipos, youā€™d want it at like 34/30 which is probably what you have. For 18650, youā€™d want it at 31/28.

Fully discharged 18650 is at 2.5V, so 2.8V is still plenty above the safe range to keep your battery happy

Yes and no :wink:, I think Iā€™ve used the wrong word in english (which is not my language). But for me 3.5V per cell is the beginning of the end and 3.2V per cell is the end. I never discharge more (lipo & li-ion). From my experience the voltage drop from 3.5V to 3.2V per cell is very quick, for example my MTB had a range of 20km but the voltage drop from 3.5V to 3.2V per cell was within 50-100m.

1 Like

It may be the end for you, but you are still objectively wrong.

Was this on a lipo or 18650 pack? You are comparing apples and orangesā€¦

Thatā€™s why I wrote ā€œfor meā€. Of course you can discharge a li-ion more than a lipo, no doubt.

It was a 10s 10Ah turnigy graphene 15c lipo pack. I built a li-ion pack as well but didnā€™t test it yet so I have no comparison.

i made some test on my first board 10s3p and no drift at all even with vesc pluged so itā€™s ok :slight_smile:

for the montain board i made somes balads in forest but it was really muddy due to the rain we had in belgium those last days. It was really fun exept when i needed to go back home and take the car. :scream: lol

http://image.noelshack.com/fichiers/2017/51/2/1513709300-img-3605.png

http://image.noelshack.com/fichiers/2017/51/2/1513709300-img-3612.png

http://image.noelshack.com/fichiers/2017/51/2/1513709306-img-3606.jpg

http://image.noelshack.com/fichiers/2017/51/2/1513709305-img-3609.jpg

yesterday i did some change of parameters and set my focbox in hall sensor plus a change of the throttle curve I will try it to go at work tomorrow

http://image.noelshack.com/fichiers/2017/51/2/1513709545-tortle-curve.png

2 Likes

here are some pics of my previous build :wink:

http://image.noelshack.com/fichiers/2017/51/2/1513709899-img-2164.jpg

http://image.noelshack.com/fichiers/2017/51/2/1513709905-img-2283.jpg

http://image.noelshack.com/fichiers/2017/51/2/1513709909-img-2642-1953.jpg http://image.noelshack.com/fichiers/2017/51/2/1513710152-img-2110-copy.jpg

http://image.noelshack.com/fichiers/2017/51/2/1513709899-img-2599.jpg

http://image.noelshack.com/fichiers/2017/51/2/1513710323-img-2575.jpg

http://image.noelshack.com/fichiers/2017/51/2/1513710326-img-2163.jpg

10 Likes

What deck was that one?

1 Like

Full carbon hand made deck with erex foam and Carbon layers.

I get a short circuit on one of my focbox :s.

Do you think it is possible to fix this?

imageimage

1 Like