frankham00
1 µW
- Joined
- Oct 21, 2014
- Messages
- 2
nice onloop!
Aprox price??
Aprox price??
Custom Battery Packs? INTERESTED?
- Thread starter torqueboards
- Start date
206monkey32
10 W
- Joined
- Mar 8, 2015
- Messages
- 78
Take my money !!!! Wow when will this be up for sale on site you think Onloop?
longhairedboy
1 W
This is exactly what I'm looking for. onloop blew my mind on my instagram thread about this and now that i'm actually seeing it i'm feeling as if i might chew off my own arm in anticipation. I am anxiously awaiting more info as well as the opportunity to pre-order.
I could slip this under a fleek little custom carbon fiber case along with the ESC, route the motor wires through grooves in a custom deck and seal them up with epoxy, finish it with some aggressive color styling with flywheel clones to match and bam. All it needs now is a die cut of nikola tesla in the grip tape. Sick ride indeed.
I could slip this under a fleek little custom carbon fiber case along with the ESC, route the motor wires through grooves in a custom deck and seal them up with epoxy, finish it with some aggressive color styling with flywheel clones to match and bam. All it needs now is a die cut of nikola tesla in the grip tape. Sick ride indeed.
bandaro
10 kW
Onloop, what orientation are the cells? I assume given the pack dimensions it has them running cross grain and 2 wide? Does this mean the pack has an amount of flex in it? So if it was stuck to the bottom of a deck (or inside it) will it be able to flex safely with the deck?
It would be great to whittle that width to 120mm as this would fit into a deck far more easily. The 23mm height is workable, so nice work there!
It would be great to whittle that width to 120mm as this would fit into a deck far more easily. The 23mm height is workable, so nice work there!
longhairedboy
1 W
bandaro said:
That's a good point. Even on stiffer concaves there's a tiny amount of flex as well. Also, there's dealing with the curve of the deck itself. I have one of DIY Electric Skateboards' aluminum black boxes under my deck at the moment and i had to pad it with foamboard to level it out due to the curve on the bottom of the deck, and its somewhere around 170 mm wide when you include the bolt flanges. The flanges had to bend a little to get a snug fit around the curve, even with the foam board padding.
I think to eliminate the possibility of flex across the grain for this pack you could either sand down a flat spot on the deck (which might be a bad idea as it would increase the flex from standing on it) or build up a platform to flatten the curve out of epoxy or something. I'll probably do the latter when i start constructing my case on my next build.
I think when I build my own decks I'm going to take a serious look at getting as flat of a bottom as possible while still having a nice concave.
Freshair
100 W
Looks good onloop
Any plans of a 12s in the future?
Am more interested in lifepo4, but if the price is right the ease of having you do all the work building the battery system for me would negate the cycle life of lipo
What type of cells are you using?
Any plans of a 12s in the future?
Am more interested in lifepo4, but if the price is right the ease of having you do all the work building the battery system for me would negate the cycle life of lipo
What type of cells are you using?
torqueboards
1 MW
What would you guys pay for a custom battery pack?
chuttney1
100 W
Give us more specs such as total capacity and discharge graphs. Im going to hope it passes regulatory clearances and safety to be ship to anywhere if be an airplane. Nice job on the battery pack Onloop.
Freshair
100 W
torqueboards said:
Depends on the set up. Something like what onloop built at 12s with decent capacity, could see myself forking out 400
Edit* 400 canadian which is the equivalent of 320 american
torqueboards
1 MW
ahh I see.. surprised myself. I (horribly) assumed no one was interested since you can get 12S 5ah LiPo for $80. lol But awesome!
Definitely, interested in the amp draw and hope it's not affected too much.
Definitely, interested in the amp draw and hope it's not affected too much.
yes, the 12S 5AH pack is definitely my best buy. So much torque with a significant miles coverage. I went for a Evolve session with Paris Evolve Riders yesterday... they had all there battery empty... so they almost all came back pushing when mine was barely at 40% and I started to have fun !
what is the price of such pack onloop?
what is the price of such pack onloop?
Freshair
100 W
torqueboards said:
Quality packs seem to fetch quite a pretty penny http://www.batteryspace.com/37V-Li-Ion/Polymer-Battery-Pack-Modules-2.aspx
Details are definitely needed!
longhairedboy
1 W
I think the integrated charger/bms is the big deal here. This makes custom builds intended for use by non-tech people who just want to skate dead easy, and would be very attractive for anyone looking to build and sell easy and reliable electric longboards. For me it is the missing piece of the puzzle.
torqueboards
1 MW
longhairedboy said:
I definitely agree. However, also realize your current setup will be - 30 to 40% difference in power because of you switching to a BMS battery. Unless the BMS is up to par.
100amp cont = 44.4v * 50amp = 2220 watts * 2 motors = 100 amps, 4440 watts.
Usually, you'll be lucky to get 60amp/80amp output.
60amp cont = 44.4 * 30amp = 1332 watts * 2 motors = 60 amps, 2664 watts.
Freshair
100 W
okp said:
This is where the 23mm slim battery pack takes the cake for me. Am designing a battery board to keep my ride nice and low.
yes - 23mm is really thin ! nevertheless I already have a charger that works fine; I would prefer to have it with no BMS if performance is impacted
I could even dig two slots in my deck and reinforce with carbon, but one you have tested 12S... you hardly go back!
I could even dig two slots in my deck and reinforce with carbon, but one you have tested 12S... you hardly go back!
onloop
10 kW
- Joined
- Jun 24, 2013
- Messages
- 600
There is some more news about this new battery, the Enertion UltraCell on my blog, here: http://www.enertionboards.com/the-best-electric-skateboard-battery/
I thought id also share this interesting 'info-graphic' i made up for the article i wrote.... maybe it will get you thinking again about the cost of LIPO
*Prices are in USD
I thought id also share this interesting 'info-graphic' i made up for the article i wrote.... maybe it will get you thinking again about the cost of LIPO
*Prices are in USD
torqueboards
1 MW
Looks great 
although peak output 60amps
36v * 60 amps (peak amp) = 2160 watts max power
vs
44.4v * 100amps (cont amp) = 4440 watts *Of course with dual motors. *LiPo Power Output based on (2) 6S 5ah 20C Turnigy packs in series.
The truth is RC hobbyists use high amp discharge lipos for a reason. Pure power output without restrictions.
You won't see any quad-copters or performance RC cars with an on-board charging system. I doubt you would see it forever even in your near future.
It's definitely something that you would have to accept.
This is one of the best things about DIY.
True power without restrictions.
You simply might as well buy a boosted, evolve and/or *fancy, low power* production board.
I've wanted an on-board charging setup but what you give up is simply too much for convenience (on-board charging). Hence, the reason why I personally wouldn't make the switch. I would probably sell them for the convenience but I wouldn't use them on my own setup. Takes me maybe 30 seconds to remove my battery pack and another 1-2 minutes to pop onto the charger. Which I can fully charge in 30-40 minutes.
Just IMO.
Con's for On-Board Charging
- Cost to replace broken/unbalanced battery - Cost of the battery itself - $329
- Half the power output - 2200 watts vs 4400 watts
- A DIY Board which runs like a boosted, evolve
BLEH
although peak output 60amps 36v * 60 amps (peak amp) = 2160 watts max power
vs
44.4v * 100amps (cont amp) = 4440 watts *Of course with dual motors. *LiPo Power Output based on (2) 6S 5ah 20C Turnigy packs in series.
The truth is RC hobbyists use high amp discharge lipos for a reason. Pure power output without restrictions.
You won't see any quad-copters or performance RC cars with an on-board charging system. I doubt you would see it forever even in your near future.
It's definitely something that you would have to accept.
This is one of the best things about DIY.
True power without restrictions.
You simply might as well buy a boosted, evolve and/or *fancy, low power* production board.
I've wanted an on-board charging setup but what you give up is simply too much for convenience (on-board charging). Hence, the reason why I personally wouldn't make the switch. I would probably sell them for the convenience but I wouldn't use them on my own setup. Takes me maybe 30 seconds to remove my battery pack and another 1-2 minutes to pop onto the charger. Which I can fully charge in 30-40 minutes.
Just IMO.
Con's for On-Board Charging
- Cost to replace broken/unbalanced battery - Cost of the battery itself - $329
- Half the power output - 2200 watts vs 4400 watts
- A DIY Board which runs like a boosted, evolve
BLEH
You are very wrong. 60 A is continuous rating, peak is more like 105 A. (at least the cells, not sure about BMS)
Also, lipo C rating is overrated, so 20C might be peak, continuous is more like 5C (25A).
So, redo your math...
@onloop - which cells are in the pack on that picture?
Also, lipo C rating is overrated, so 20C might be peak, continuous is more like 5C (25A).
So, redo your math...
@onloop - which cells are in the pack on that picture?
torqueboards
1 MW
riba2233 said:
Do you have references for 5C cont? I would be interested in looking at it. As the last thing I would want to do is inform incorrect information. I've heard of it but never seen it.
5ah * 5c = 25amps which seems very incorrect.
Onloop mentions 60a peak on his product page most likely due to BMS.
torqueboards
1 MW
riba2233 said:
Cool thanks. Looks like they mentioned divide by 4 rating for LiPo's. I doubt it's that low that must be a conservative value. I'm pretty sure I push a lot more then that through my packs. I'll attach a watt meter to it and find out.
onloop
10 kW
- Joined
- Jun 24, 2013
- Messages
- 600
Firstly lets just acknowledge one thing.... you do not need 100A continuous for an electric skateboard.
Even if you could pull this much power continuously (which you can not) your motors and electronics would fry fairly quickly. Nothing is designed for this extremely high level of continuous power throughput. Therefore you don't need a battery that can offer it.
NOW, if for some reason your system is pulling this high amount of power you probably need to completely redesign your drive system because it is inefficient...
TRUTH IS > on average you probably need about 20A continuous. With peak amp draw of 50-60A for 1 or 2 seconds.
Its easy to test for yourself! If you have never attached a watt meter to your skateboard I suggest you try it. You might learn something about your setup.
Still don't believe me? here is some video evidence of this
[youtube]inj75Ku7KXU[/youtube]
The reason small RC toy vehicles don't have on board BMS is because of space & weight limitations. Stop comparing skateboards to RC, they are completely different.
I am 90kg, I can reach top speed of 45km/h within 5 seconds and climb steep long hills with this battery.
NOTE: This battery is also actually serviceable, you can remove any faulty cell and replace it, the individual cells are really cheap and readily available for $10-$15
Even if you could pull this much power continuously (which you can not) your motors and electronics would fry fairly quickly. Nothing is designed for this extremely high level of continuous power throughput. Therefore you don't need a battery that can offer it.
NOW, if for some reason your system is pulling this high amount of power you probably need to completely redesign your drive system because it is inefficient...
TRUTH IS > on average you probably need about 20A continuous. With peak amp draw of 50-60A for 1 or 2 seconds.
Its easy to test for yourself! If you have never attached a watt meter to your skateboard I suggest you try it. You might learn something about your setup.
Still don't believe me? here is some video evidence of this
[youtube]inj75Ku7KXU[/youtube]
The reason small RC toy vehicles don't have on board BMS is because of space & weight limitations. Stop comparing skateboards to RC, they are completely different.
I am 90kg, I can reach top speed of 45km/h within 5 seconds and climb steep long hills with this battery.
NOTE: This battery is also actually serviceable, you can remove any faulty cell and replace it, the individual cells are really cheap and readily available for $10-$15
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