48v 1000w Wheel for $300 Free Postage in AUS

[jbalat]

Does anyone have any background on this kit off ebay ?
http://www.ebay.com.au/itm/Electric-Bicycle-E-Bike-Conversion-Kit-Cycling-48V-1000W-Rear-Wheel-LED-Light-/130824344528?pt=AU_Sport_Cycling_Parts&hash=item1e75bd13d0#ht_8291wt_1399

Will it handle 16S ??

 

[wesnewell]

16s lifepo4 yes. 16s rc lipo no. The controller is limited to 63V max (15s rc lipo).

 

[jbalat]

Is this the controller you would recommend for 16s lipo ?
http://www.aliexpress.com/item/New-72V-1500W-Brushless-Speed-Controller-for-Electric-Bikes-E09078/533387674.html

I was planning on using these hk lipo hard case batteries
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=19499&aff=398199

If anyone can recommend a bms I would appreciate it.. Thanks JB.

 

[TheBeastie]

Does anyone have any background on this kit off ebay ?
http://www.ebay.com.au/itm/Electric-Bicycle-E-Bike-Conversion-Kit-Cycling-48V-1000W-Rear-Wheel-LED-Light-/130824344528?pt=AU_Sport_Cycling_Parts&hash=item1e75bd13d0#ht_8291wt_1399

Will it handle 16S ??

What happened to your chinese bike you modded? Are you not happy with it? Not fast enough?

 

[wesnewell]

Is this the controller you would recommend for 16s lipo ?
http://www.aliexpress.com/item/New-72V-1500W-Brushless-Speed-Controller-for-Electric-Bikes-E09078/533387674.html

No. LVC will be too high for 16s. But it would work fine for 20s. Get one of these if you want to run 16s.
http://www.aliexpress.com/wholesale?SearchText=60v+brushless+controller

I was planning on using these hk lipo hard case batteries
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=19499&aff=398199

If anyone can recommend a bms I would appreciate it.. Thanks JB.

I don't, and wouldn't use a bms. I monitor pack voltage with this and charge with an rc charger.
http://www.ebay.com/itm/Waterproof-Digital-Voltmeter-DC-15V-To-120V-Red-Led-Voltage-Digital-Panel-Meter-/170846310527

 

[jbalat]

What happened to your chinese bike you modded? Are you not happy with it? Not fast enough?

Yeh its a pretty cool commuter. I converted it to 12s lipo and used the smart bms and bulk charger. Im happy that its a nice plug and play solution and not a science experiment but I probably should have taken advantage of the smartbms and gone for 13s. At full charge I get 36km/hr but drops to about 32km/hr as the voltage goes down and less when its windy.

I fitted it with some marathon plus 1.5" tyres and didnt get any gain in speed or efficiency. On a long ride to a freinds house my battery cut out with 3kms to go - thank you bms however with a slight uphill and headwind I was in first gear doing less than 10kms/hr dripping in sweat.. So much for trying to ride an electric bike without a battery !!

At that point I decided to drop idea of an efficient commuter and build up a dual suspension bike that I can have a bit of fun with. Yes I would love a stealth bomber :lol:

 

[jbalat]

Is this the controller you would recommend for 16s lipo ?
http://www.aliexpress.com/item/New-72V-1500W-Brushless-Speed-Controller-for-Electric-Bikes-E09078/533387674.html

No. LVC will be too high for 16s. But it would work fine for 20s. Get one of these if you want to run 16s.
http://www.aliexpress.com/wholesale?SearchText=60v+brushless+controller

I was planning on using these hk lipo hard case batteries
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=19499&aff=398199

If anyone can recommend a bms I would appreciate it.. Thanks JB.

I don't, and wouldn't use a bms. I monitor pack voltage with this and charge with an rc charger.
http://www.ebay.com/itm/Waterproof-Digital-Voltmeter-DC-15V-To-120V-Red-Led-Voltage-Digital-Panel-Meter-/170846310527

Well 20s sounds better than 16s if you think the Wheel can handle it ?
I will also run a panel voltmeter but I am using a bms now and I love that I can just come home and plug the chord in, then come back in an hour and a half and its ready to go again. Best thing is my wife and kids can charge it of they had to.

 

[wesnewell]

The motor will take any voltage you throw at it as long as you don't exceed 1500W for too long. It's not the voltage that kills the motor, it's prolonged power that heats it up. I run mine with 24s and it sure looks like the same motor. My motor is over 2 years old with more than 8000 miles on it.
Don't think for a second it's safe to plug and play rc lipo with a bms. I'd sooner walk away from a battery being charged on a good rc charger than I would one being charged through a bms. And I wouldn't leave a battery being charged by an rc charger if that tells you anything. A cell that goes bad while charging doesn't care what it's being charged by.

 

[jbalat]

The motor will take any voltage you throw at it as long as you don't exceed 1500W for too long. It's not the voltage that kills the motor, it's prolonged power that heats it up. I run mine with 24s and it sure looks like the same motor. My motor is over 2 years old with more than 8000 miles on it.
Don't think for a second it's safe to plug and play rc lipo with a bms. I'd sooner walk away from a battery being charged on a good rc charger than I would one being charged through a bms. And I wouldn't leave a battery being charged by an rc charger if that tells you anything. A cell that goes bad while charging doesn't care what it's being charged by.

Point taken.. But do you have an easy way of charging 20 cells at the same time without a BMS ?

So if a cell goes bad then what is likely to happen ? If it tries to charge above 4.2 then wouldnt the bms turn it off ?

 

[wesnewell]

Point taken.. But do you have an easy way of charging 20 cells at the same time without a BMS ?

So if a cell goes bad then what is likely to happen ? If it tries to charge above 4.2 then wouldnt the bms turn it off ?

Personally, with my 24s2p pack, I just break the serial connection on each side, making it 12s and charge it as a 12s4p pack. Takes about a minute to hook to charger.
Another way would be to use a bulk charger and balance board for all cells in series. The balance board would only be plugged in when charging.

If a cell goes bad during charging you could expect puffing, smoke, fire, all that or nothing at all. I've never had a problem in over 2 years, but one never knows. Only takes once to ruin your day, and maybe a lot more if left unattended.

 

[jbalat]

The only thing better than 20s is 24s

What sort of performance do you get with 24s ?

Most ebikes I have seen have a very slow take off, I'm after something that will spin the rear wheel or lift the front up if you give it a bit of stick, will I be disappointed ?

Btw if I get smoking or puffing I assume the temperature will go up first. The bms is monitoring temperature and will switch off if it overheats. The main thing that worries me is if the bms itself fails. Then again this could easily happen with a charger as well. A friend of mine has blown 3 lipo chargers. Probably best to charge the cell in a big fireproof bag or a steel garbage bin..

 

[wesnewell]

I'm 67 in a few days and 270lbs. I don't hotrod on my bike. With 24s the throttle is very touchy. My 270lbs kind of tames it. One guy said he got 53mph on it. But I've never been over 45mph. With a high amp controller, I'm pretty sure one could do a wheelie, but not me.