48V battery for 1680W to 3000W motor?

[davidsvoboda]

Hi, is there anything on the market (available ideally in Europe), that is 48V and could handle this motor - http://www.turbobikekit.com/fast-cyclone-electric-bike-kit/cyclone-electric-bike-kit/cyclone-waterproof-geared-electric-ebike-kit-1920watt-3000watt-36v-60volt and 100A discharge continuous at least.

Thanks for any suggestion! I don't want to build my own battery, I'm looking for complete reliable kit.

 

[wesnewell]

That kit comes with a 100A max controller, so the battery pack you get should be capable of at least a 100A output. The motor wattage doesn't matter. The controller is what draws power from the battery.

 

[davidsvoboda]

Maybe I don't understand battery properly, but if the controller tells me 100A maximum and 40 A continuous. Am I right to say that any battery will also need MAXIMUM 100 A (it cannot be more, like 140, right? ) and with 40A continuous??

I don't understand why you are saying at least 100 A for battery if the controller tells me 100A maximum. What am I not getting?

 

[Chalo]

What are you planning to do with the motor that requires 4800V electrical power? You'll destroy the freewheeling crank first, then the normal bike gears, at that power level.

I use that motor in a heavily loaded trike, at 36V with the 22A continuous/40A max controller. But I use it to propel the trike's rear axle directly, not through the pedal drivetrain. Even at a relatively modest power level like that, it has destroyed the motor mounted freewheel promptly when the chain became slightly overtightened. The bike's chain will be overtightened on the crank's freewheel whenever you are motoring without pedaling.

That motor is too wide to fit between normal cranks, in the typical Cyclone kit position. You'll have to use weird wide cranks that make you pedal like a duck. The pictures in the link show this.

 

[davidsvoboda]

well, I have ordered the kit already. So you are saying I won't be able to pedal normally? Also, I hope I don't have to buy anything extra with the kit.. :/

Could anyone please just tell me what battery I need to go with the controller as the guys from turbo bike kit are incapable of doing this.
Obviously I would like the bike to go as close to 70km/h as possible.

 

[dogman dan]

Actually, if you want to pull 100 amps, what you want is a battery able to handle 200 amps. If you want to have the battery last longer, and perform without a lot of voltage sag, and heating up the battery.

That controller will need a lot of battery, or, it will need a lot of wallet to replace it relatively often. Look for the highest discharge rate you can afford.

Though you may pull 100 amps getting started, cruise amps will be determined by the no load rpm of the motor using 48v, and the wind resistance, weight of the rider, grade, etc.

Typically, 2000w of power can get you to 35-40 mph, so that may be where they get the 40 amps continuous spec from.

Cyclone, no surprise. A few years back they were notorious for killing batteries. I think those kits had 40 amps controllers. They ran like a bat outta hell though, for a while. Then if they didn't chew up the bike gears, they chewed up the kits chain and gears.

 

[riba2233]

Maybe I don't understand battery properly, but if the controller tells me 100A maximum and 40 A continuous. Am I right to say that any battery will also need MAXIMUM 100 A (it cannot be more, like 140, right? ) and with 40A continuous??

I don't understand why you are saying at least 100 A for battery if the controller tells me 100A maximum. What am I not getting?

It can be more, but it shouldn't be less. Have you seen my mail?

Actually, if you want to pull 100 amps, what you want is a battery able to handle 200 amps. If you want to have the battery last longer, and perform without a lot of voltage sag, and heating up the battery.

It's 100 amps peak, so no need for battery that can peak 200 amps. After all, controller is 40 A cont., so battery that has 100 A or more cont. is already more than enough.

 

[jaunty]

wow this really got out of hand fast. LOL

The controller is rated for 100A MAXIMUM. You will never use this much current (except initial acceleration in extreme uphill situation).. You're needing 40A continuous.

Your kit says which type of batteries to get...

Require LifePo4 battery with 38120, or 38140 or 40152 cells with 50A-100A BMS or lipo batteries.

Those are headway cells. They aren't terribly expensive. It does say lipo though, so you'll need a large pack so that each series bank doesnt get stressed.

You could try something like this...if you're RISKY like me! Actually i bought one from this guy...i'll review in in a few months when it gets here!
http://www.ebay.com/itm/48v-30ah-LiFePO4-Battery-BMS-5A-Charger-Ebike-Bicycles-Kits-Rechargeable-8-Weeks/171755207568?_trksid=p2141725.c100338.m3726&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20141212152715%26meid%3D322eb2ba4fca4d59a283f01dc46ee7f2%26pid%3D100338%26rk%3D3%26rkt%3D28%26mehot%3Dlo%26sd%3D171767698018

 

[riba2233]

You could try something like this...if you're RISKY like me! Actually i bought one from this guy...i'll review in in a few months when it gets here!
http://www.ebay.com/itm/48v-30ah-LiFePO4-Battery-BMS-5A-Charger-Ebike-Bicycles-Kits-Rechargeable-8-Weeks/171755207568?_trksid=p2141725.c100338.m3726&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20141212152715%26meid%3D322eb2ba4fca4d59a283f01dc46ee7f2%26pid%3D100338%26rk%3D3%26rkt%3D28%26mehot%3Dlo%26sd%3D171767698018

I would never buy something like that... Shitty cells with 0.5C discharge rate at best and awful sag, and pretty low cycle life, and low quality bms that will stop working, that's only a matter of time.

 

[999zip999]

Yes that battery wouldn't last with your controller.

 

[jaunty]

yeah its the cheapest option.. that's why i said RISKY. If you paralleled two, you'd be fine. Or baby the one, which doesn't sound like that what the OP wants to do so yeah its probably a bad option!

Riba where you come up with 0.5C? just curious?

 

[dnmun]

48V nominal is 60V DC so it would be 6kW of power, not 3.8kW which is the max the motor is labeled and from what i understand the cyclones will not even handle 2kW.

 

[riba2233]

yeah its the cheapest option.. that's why i said RISKY. If you paralleled two, you'd be fine. Or baby the one, which doesn't sound like that what the OP wants to do so yeah its probably a bad option!

Riba where you come up with 0.5C? just curious?

I've measured similar chinese lifepo4 battery, it sags like hell; maybe even 0.5C is too much. It also has small volume for it's capacity. It's also ginormous, and not suited for bicycle, lion 30Ah could work, but would be too expensive.