Am I wasting my money?

[Teaker68]

Have BBS02-750W with conversion kit on my fat tire bike using a 48V11.6AH Samsung 29e battery. Looking to get more torque and more range. About to make purchase on 52V13.6AH using Panasonic NCR B 3400 - 3400mah cells. Respect what you guys say versus vendors. Any input appreciated.

 

[DAND214]

you will get a little more power and yes on range. But if you run WOT you might not see much improvement.

 

[Samd]

Thats the problem with the BBS units. You could change the gear ratios.

 

[nutnspecial]

Hi, unless you are current limited on your 11ah battery which prob isn't the case provided it's in decent shape, the only improvement you'll see with the new 13ah is the extra range that additional 2ah provides.
'wasting money' imo would come down to how bad you desire an additional 2 or 13ah, and of course the condition of your current battery.

As far as vendors I couldn't say. Buy from the most trusted and well rated source in your country if possible. Other than that, you could gear down or reset/tweak/override controller for more torque and/or range!

 

[tommie]

In a similar situation myself with the present 11aH.
I take it you still want to keep the waterbottle frame mount?

Well i`ve come across this 18aH `bottle` item here http://nl.aliexpress.com/item/48v-15ah-electric-bicycle-lithium-ion-battery-48v-15ah-water-bottle-ebike-li-ion-battery-kettle/32636485587.html?spm=2114.10010108.1000013.2.K7GVxY&scm=1007.13339.33317.0&pvid=58845160-1788-426b-ba6e-b72c82cb2432&tpp=1

If true this should give more range/torque

 

[Teaker68]

I've programmed the current controller with better throttle response (no lag) and also changed setting for wheel size to 18" from 26". Does anybody know the settings Eric at Luna Cycles in US is using for his hot rod settings? Was looking on his site stating the 52V would be a advatage regarding more torque and range. Nothing is wrong with my current battery.

http://lunacycle.com/batteries/packs/52v/52v-pansonic-11-5ah-13-5ah-dolphin/

 

[JayCee]

Have BBS02-750W with conversion kit on my fat tire bike using a 48V11.6AH Samsung 29e battery. Looking to get more torque and more range. About to make purchase on 52V13.6AH using Panasonic NCR B 3400 - 3400mah cells. Respect what you guys say versus vendors. Any input appreciated.

The drive motor controller is current limited, so you'll potentially get an 8% increase in torque/power due to the extra voltage, assuming that the NCRB cells hold up as well as the 29e cells. Personally, I wouldn't bother - I don't think you'll get enough of an appreciable increase to justify the expense.

 

[teklektik]

What they all said ^^^

First, you are talking about an incremental change in range and probably none at all if you start chewing up more Amps to feel the ponies - always a problem...

Second, torque comes from phase amps which are always determined/limited by the controller. The usual method to improve the torque is to mod, reprogram, or replace the controller as the bottleneck in getting the battery to the road. But in your case, the controller is pretty much scaled to avoid decimating the drive system. Unlike DD hub motors where the primary caution in goosing the current (to get more torque) is overheating, the BBS has a lot of mechanism that limits what you can pour into the motor. So - in the end you are torque-limited by your drive system - which trickles down to design choices for the controller, and hence the battery. You just can't get any big torque increase by diddling controller parameters or bumping the battery. As Samd said - you can fiddle the gears - but that's reshaping the power you already have, not increasing torque in its own right.

Last, range you can do - but the value of your planned 2Ah is unlikely to make a difference unless some common commute is just barely out of range - in which case it's the biggest 2Ah in the world . If you want big range, you need a big battery. EM3EV is arguably the most respected battery provider known on ES. Take a look at one of their triangle packs.

• FWIW - Although EM3EV is located in China, Paul is an English guy with a sophisticated battery production facility - they ensure quality by fabricating their own packs instead of re-branding Chinese packs - which is what you'll get from any US battery reseller (unless they're selling US-made AllCell packs).

 

[LewTwo]

....instead of re-branding Chinese packs - which is what you'll get from any US battery reseller (unless they're selling US-made AllCell packs).

Correct me if I am wrong but I believe Lunacycle is also located in the US. Your brush might be a tad too wide.

 

[Teaker68]

I can't thank you all enough for the information. The information on Luna Cycles website (located in US) was what prompted me to believe I could gain more torque to push the 4" tires with a 52V battery. That's why I double checked with all of you. I have 4 BBS builds and have them programmed within the same parameters. Talked to another guy stating he was breaking chains and other drive components with the 52V. What kind of cells do you all suggest if I go with a larger motor and triangle pack. Wish somebody knew how Luna programs his controller's.

 

[teklektik]

Correct me if I am wrong but I believe Lunacycle is also located in the US. Your brush might be a tad too wide.

Yes, you are correct, Luna is located in the US.

That said, although Eric gets volume pricing on cells because of his vaping business, the packs are not manufactured by Luna nor in the US.

 

[Teaker68]

I'm waiting for someone to chime in to see how Eric from Luna programs his controllers.

 

[neptronix]

I would get a bigger battery. The one you are looking at isn't much bigger. You can stuff 25ah / 48v into a triangle these days with 18650's if you have the space for it.