Is this a decent 36v10ah battery?

[dgk02]

I'm looking for a kit and battery, and this battery seems ok:http://www.greenbikekit.com/index.php/36v10ah-lifepo4-ebike-rack-battery.html
Is there a ton of shipping cost on this?

I wanted 15ah but this seems pretty reasonable for one with a rack mount and if I need more distance for a ride I could even get a second one. I looked at Ping for something similar and it costs more, which is ok, but doesn't seem to have any way to mount it on the bike - just a blue vinyl covered bunch of batteries I think. How do folks mount something like a Ping battery on a rack?

 

[patpatbut]

Have you looked at the BMSbattery web site?

Lifepo4

http://www.bmsbattery.com/36v/466-24v-lithium-ion-little-frog-abs-shell-ebike-battery-pack.html

Or LiCoMn
http://www.bmsbattery.com/36v/464-36v-15ah-lithium-ion-electric-bicycle-battery-pack.html

Pat

 

[dgk02]

Have you looked at the BMSbattery web site?

Lifepo4

http://www.bmsbattery.com/36v/466-24v-lithium-ion-little-frog-abs-shell-ebike-battery-pack.html

Or LiCoMn
http://www.bmsbattery.com/36v/464-36v-15ah-lithium-ion-electric-bicycle-battery-pack.html

Pat

What's the practical difference between those two? I think the LiFePo4 lasts longer but the LiCoMn is lighter? I guess that's why the LiCoMn has three more ah for the same size?

 

[patpatbut]

Yes you are correct

Lifepo4 is heavier but have more charge cycles

LiCoMn is opposite of Lifepo4

I am using that 36v 12ah lifepo4 with case and rack and it is still going strong after 3000 miles

Pat

 

[friendly1uk]

The maximum discharge rate is a little low at 15 amps. It means your limited to the typical 6 fet 250w controllers.
The charge rate is also a bit low at 2.5 amps. I'm guessing 4 hours is the best charge time possible

 

[d8veh]

The most important thing is matching your battery to your controller. those batteries are all OK for a 15 amp (max) controller, i.e. a 250w motor. The 15aH one would be ok for a 22 amp controller (350w motor).

It would be best if you described your motor and controller, then you can get proper advice on which battery to fit.

Greenbikekit have the lower shipping cost, but BMSBattery have a better choice of batteries, especially for higher power.

 

[dgk02]

Ah, I don't have the kit yet. But I'm looking at a 350 front wheel hub so I guess the 15 aH one is the way to go. I'm guessing that batteries will be better and cheaper when this one starts to go.

One suggestion I got was to run a 24v QT at 36v in order to get faster speed, so I'll probably need the better battery if I do that. Or the Bafang - 300 rpm guy which is already 36v.

 

[patpatbut]

Ah, I don't have the kit yet. But I'm looking at a 350 front wheel hub so I guess the 15 aH one is the way to go. I'm guessing that batteries will be better and cheaper when this one starts to go.

One suggestion I got was to run a 24v QT at 36v in order to get faster speed, so I'll probably need the better battery if I do that. Or the Bafang - 300 rpm guy which is already 36v.

What speed do you want to maintain? On 26 inch bike I suppose?

 

[dgk02]

It will be a 26" wheel, at least to start. Mostly I'll be happy running at 15 mph or so but sometimes it's handy to be able to jump to 20 mph just to make it easy to work with traffic.

I currently have two ebikes, a Trek (BionX) Valencia+ and a Currie Eco-something. The Trek is my normal commuting bike and the Currie is for the Significant Other but sometimes I take it just to give it more exercise. It won't go much above 15. So the idea is to spell the Trek since I'm putting an awful lot of miles on it and had to replace the wheel twice due to breaking the axle. If that happens again it's going to be very expensive. I don't know why the axle broke since I don't jump curbs or anything but it does have around 10,000 miles on it.

The idea is to have a better secondary ebike than the Currie, but I don't want a rocket and I figure that something less proprietary than the Trek would be fun to play with. The battery may very well end up on a 700c as well as the 26.

 

[patpatbut]

36v battery should do the job. By any chance you want to go around 20mph you need at least 12ah battery ideally 15ah with 15amp out.

If you get bafang cst with 287 rpm it should get you around 20mph on 26 inch wheel

Pat

 

[d8veh]

Only the 500w CST does that speed, the 350w one is much slower. You might just get 20 mph out of it using the boost on the three-speed switch connector if you use the ku93 controller, but that controller is not good for PAS if that's important to you.

The Q100 type motors are pretty good if you're not too heavy. The 24v 201 rpm Q100 at 36v will do about 22mph. You'd need to feed it a bit of extra current to maintain the speed, so solder 30% of the shunt in a 15 amp controller; however, there's a big difference from a work-horse of a motor like the 350w BPM code 11, which will be totally under-stressed.