3000W SBP Battery Questions

[bluck]

Hi guys I am looking for the smallest amp battery to safely power the 3000W cyclone motor from Sick Bike Parts. I wanted to know where is the best place to get a battery preferably 52v and what amps should I get to keep the battery from dying to early. I would prefer a type of battery that mounts to the bottom tube of the frame. Something like those cylindrical batteries, I am not sure if they make any that shape for the amps I am going to need. A square or triangle pack is also fine though. I just want to know where I can get the best bang for your buck and not over pay. SBP also has their 3000w cyclone motor kit off the website so I cannot get any information from there. I expect around 20mile range maybe 25miles with pedaling so don't really need anything too crazy. I ordered the 48v version of the kit btw. Let me know if you need any more information from me.

 

[Tony01]

Hobbyking multistars. They have a huge sale every spring.

Far as ah and c requirements, 3000w at 50v is 60a. You can assume that’s continuous, and also assume a 5kw peak. Depends on your controller. The multistars are specd at 10c but people say they are only good to 4c max with 2.5c continuous or so. So I think a couple of 6s 16000mah bricks would do it. 16*2.5=40a

 

[bluck]

What do you mean by 10c and 2.5c? I should have mentioned this is my first electric bike build I have done many gas motor builds though. So not familiar with all the electrical talk haha. I have read on the voltage, watts, and amps so I understood what you meant on the first sentence just not the second.

I have this controller:
http://sickbikeparts.com/36v-72v-cyclone-programmable-controller/

My throttle is a 40v twist throttle.

Those batteries you mentioned do I have to wire them together myself?

 

[Tony01]

yeah but it is only two bricks you have to wire, make sure you wire them in series for 12s.

you might want to spend some time on endless sphere forums. I'm building my first ebike as well and the learning curve is very steep.

C rating is a charge rate. A battery rated for 1C continuous discharge, can theoretically provide its capacitance without voltage sagging. Ie. a 5ah cell rated for 10c cont discharge and 2c charge can theoretically output 50amps and be charged at 10 amps. The battery in your cell phone probably around a 1600mah is probably rated for .5c and can do 800mah continuously. but a cell phone doesn't need high current, it needs enough current for a longer time. So a cheaper, lower C rate battery goes into the phone.

Since most battery ratings are on the high side, and voltage sag is a thing, you generally dont want to pull more than about 1/4 the rated C rate. so on a 16ah HK multistar rated for 10c or 160 amps, it'll run better and sag much less if you only pull 40a from it.

 

[Velodrome]

Your controller is 48v but your wanting a 52v ? Will your controller accept 52v ( closer to 60v on a full charge ) without letting the smoke out? If the smoke comes out of the box you'll need a new controller. It has to stay IN the box.

 

[Nashville Kat]

The batteries are usually a higher voltage peak than advertised- my 36v sets- run series of ten 18650 so that comes out to 42 v - 36v is the middle working range- I haven't looked into higher voltage- 36 suits my needs- especially now using Hoverboard packs- 52 sounds about normal high end of a "48v" system.

On the other hand- I've now put a 500 watt controller- 22 ah instead of the "usual" 13 or so ah onto my latest build with a 36v 250 watt hub. It pushes it almost, but not quite as quick, as the same kind of controller on my 500 watt build- and I don't feel it's straining it in any real way- the hub is the same size- they're mostly just rated differently- possibly even for marketing concerns.

There's a lot of discussion on the web about running stronger controllers rated higher wattage than the hub, if you search it out. I didn't particularly get the controller for more sped- actually for more compatible connectors-

but it's a great added bonus to have similar performance on BOTH hubs, with 22 amps when I'd definitely be getting less with a smaller 13 amp controller. As an old racing cyclist, I'm usually about staying minimal- now I've arrived at smaller battery packs but quite happy with a slightly larger controller I was originally bumming over- they're from Ebicycling I think the name is correct.

 

[bluck]

I specifically mention the SBP shift kit because if you know it can handle up to 72v on the controller. The engine is rated for 3000Watts. I have finished my electric bike build with the battery which I chose to be 52v 17.5ah. I get 36mph top speed on 3rd gear accelerates quick on 1st gear. I go to school and back 2 days before It shows the last bar on the battery. Its about 6-7 miles going and another 6-7 miles coming back. 2 hills are on my route and one long full throttle path. Lots of stops and goes in between. So im getting over 24miles of range and I haven't fully depleted the battery not even once which is perfect for me. Im thinking of increasing the gearing for 38mph top speed. The bike does great really good and light highly recommend I will post some pictures.

 

[bluck]

 

[Tony01]

View attachment 100516

So clean. Love the old school little headlight on the front. I saved this picture.

 

[bluck]

So clean. Love the old school little headlight on the front. I saved this picture.

Thanks I didnt expect it to come out this good. The front light is very bright and actually has a built in horn which is very loud. It is powered by the main battery turns on with a switch.

 

[Velodrome]

VERY NICE !! Love the Yosh sticker What rear hub are you running? Nexis 3 speed?

 

[bluck]

Yeah dad debating on the sticker but it needed something ha. Im running a nexus 3 speed hub it's great im amazed on how quiet it is when coasting the freewheel does not click. It does when the chain starts to loosen though never had a hub this quiet.

 

[waynesdata]

How did your bike turn out? Do you like it more or less than your gas builds.

 

[bluck]

How did your bike turn out? Do you like it more or less than your gas builds.

The bike turned out great have not had any problems except that the motor did get loose once and I had to re-tighten and use thread-locker. I love my gas motorbikes but this thing is superior in every way, except top speed it reaches 36mph (tested on my phone GPS, verified GPS with a car speedometer and its exact). I usually have my 2 strokes reaching around 40-42mph. I am sure I can modify the gearing to get it to reach around 39 maybe 40. It accelerates faster than my motorbikes though but only for about 2 seconds. Since I am using thinner tires than the 26 inch it is a lot bumpier ride.

Overall though I don't maintain anything but tighten and oil the chain every other week, check tire air pressure every 2-3 days, and recharge the battery after every ride. I commute to school 60 miles per week, my battery has a range of about 19-25 miles depending on how I use the bike. I can go two days (24 miles) of not charging the battery and make it to school and back home (which I've done when forgetting to charge the battery). I actually have done 2.5 days (almost 30 miles) of range but I did pedal a lot more and that's because I forgot to charge it for two days lol (I also have a weight of 155-170, I fluctuate my weight because I work out depending on the season). Most is just straight wide open throttle but I usually go about 33 miles per hour instead of a full 36 just to keep the battery from draining to much. The more the battery drains the lower the top speed and acceleration though. Other than that It also keeps the bike clean no grime from the gas and oil leaking unto the bike, and since its quiet to ride(besides the wind noise) I actually listen to music with wireless earbuds while I ride (it helps keep the wind noise down as well).

I believe its definitely worth saving the money for, just because I don't really have that much time to maintain my bikes while I am in school. I also have saved money on gas and oil so I actually have some money left over to take it to a local bike shop that does great work and usually have them do a tune up like straighten my wheels, check all my bolts are tightened, and adjust my brakes(since I use drum brakes don't require much maintenance either).

Highly recommend.

 

[indian22]

Wonderful review of living day in and out with your beautiful e-bike. I wish more members would update after the builds are completed and include photos along the way. Building is fun but riding a good bike is joy and should be shared with others along the way!

Good job!

Rick C.

 

[waynesdata]

@bluck I looked at every 3000W cyclone youtube video I could find. 36mph seems to be a very common limit and diminish and return point. A 72v bike only hit 42mph.

 

[MotoMagz]

@bluck I looked at every 3000W cyclone youtube video I could find. 36mph seems to be a very common limit and diminish and return point. A 72v bike only hit 42mph.

You get to 42 real quick on 72v! I had the set up on 20” wheels.

 

[bluck]

@bluck I looked at every 3000W cyclone youtube video I could find. 36mph seems to be a very common limit and diminish and return point. A 72v bike only hit 42mph.

I believe that with a higher gearing and 72v it will reach above 45mph. I'm only using about 1,300-1500Kw with my battery. The limititing factor is the type of cells used. If you want speed don't use cells that dont give out much energy

 

[waynesdata]

You get to 42 real quick on 72v! I had the set up on 20” wheels.

For what a electric bike cost I expect more.

Researching to see if 3000W cyclone would work with battery and controller from Tony01 build. Regenerative braking, expansion chamber zeda 80 speeds, and 15000 mile+ life are a must.

 

[bluck]

For what a electric bike cost I expect more.

Researching to see if 3000W cyclone would work with battery and controller from Tony01 build. Regenerative braking, expansion chamber zeda 80 speeds, and 15000 mile+ life are a must.

Are you trying to do a hybrid of gas and battery with a 2 stroke?