New Bafang Crank-Drives

Discussions related to motors other than hub motors.
This includes R/C motors, botttom bracket, roller and geared drives.
wheebikes   100 µW

100 µW
Posts: 8
Joined: Feb 10 2014 11:30am

Re: New Bafang Crank- DRives

Post by wheebikes » Nov 22 2014 2:17pm

So the rainy season's coming on....what have people been doing with their Bafangs? I've taped around some of the connectors and plastic-wrapped the screen, but I'm still scared to take it out in more than a very light drizzle.

Any experiences, good or bad, with the BBS02 and really wet conditions?

User avatar
KINNINVIEKID   1 kW

1 kW
Posts: 352
Joined: Jul 14 2014 4:49pm
Location: Teesdale,England

Re: New Bafang Crank- DRives

Post by KINNINVIEKID » Nov 22 2014 4:42pm

Mine is standard and I have been through a foot deep ford 6 times with it without problems.
Its the lcd and throttle that would need waterproofing.
BBSHD on 2017 Marin Muirwoods
BBS02 on Cannondale Trail 6
Dillenger 1000 watt front wheel kit on Trax TFS1 MTB.
250 watt chinese scooter!
Cyclamatic Power Plus 250 watt road bike.

User avatar
Geebee   1 kW

1 kW
Posts: 471
Joined: Jan 13 2007 12:05am
Location: Hobart, Tasmania, Australia

Re: New Bafang Crank- DRives

Post by Geebee » Nov 22 2014 6:23pm

astmacca wrote:

Curious now though about wH / km?

With the programming i run and my riding normal habits i seem to be getting about 4 - 5 wH/km "fuel economy".

Hammering it ( for me), by using 85 - 100% current on PAS ( 15 - 18Amps draw) and being liberal on throttle use i'm getting about 9wH/km.

Hmm.. at that rate 440wH / 9wH/km is a range of 48km. Noice. :)

Had a look in this article:

https://www.electricbike.com/watt-hours/

and they are saying real world use is around 20wH/mile ( 12.4wH/km). That seems a lot??

Most of the bikes in that article are Hub drives though. Are Mid Drives (that use the bikes gears, i change gears a lot actually) that much more efficient??
wH/km are affected by speed, gearing, terrain and the biggy how much effort you put in, when healthy I averaged 3 to 5wH/km, now the trike does all the work a bit under 10 wH/km, to get 20wH/km you would have to be not pedaling and travelling fast.
A Cd can be more efficient if you use the gears efficiently, if not it will be similar to a hub, although as Kinninviekid shows compared to a DD hub he is getting double the range.

User avatar
John Bozi   1 MW

1 MW
Posts: 1861
Joined: Apr 09 2013 1:46am
Location: Brisbane, Australia
Contact:

Re: New Bafang Crank- DRives

Post by John Bozi » Nov 22 2014 6:58pm

Geebee wrote:You will need the LCD which also has the PAS and on/off switch unit attached to it permanently, also the speed sensor although that can be setup on the ring on the cranks if you wanted to but you lose accurate speed indication.
I suppose you could mount the lcd in the battery bag if you want it invisible?
thanks geebee -

Forgot to ask does the controller/motor have its own heat temperature cut off limit?

I'm interested in running all this on my hub motor bike to have two motors. Hence I don't want any more displays... clutter

just a neat tidy mid drive block and throttle / kill switch.

cheers

User avatar
Geebee   1 kW

1 kW
Posts: 471
Joined: Jan 13 2007 12:05am
Location: Hobart, Tasmania, Australia

Re: New Bafang Crank- DRives

Post by Geebee » Nov 22 2014 7:44pm

If I remember correctly the newer version have a temp cutout on the controller, I have never hit that temperature and hope I never do :)
The cheapest place to buy as you are in Oz is emax, plus quick delivery. http://www.emax-ebikes.com.au/

cwah   10 GW

10 GW
Posts: 4185
Joined: Jul 24 2011 5:42am
Location: Between paris and london

Re: New Bafang Crank- DRives

Post by cwah » Nov 23 2014 2:04pm

tungsten2k wrote:
cwah wrote:I have a BBS02 and it's integrated :(
Picture ?

-=dave
Solved it finally, it was a removable sensor, bad connection. Now it's all good.

It's an hell of a nice kit. Too bad it doesn't have torque sensor
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

RiverRat   1 W

1 W
Posts: 54
Joined: Jul 19 2014 6:52pm
Location: Cairns Australia

Re: New Bafang Crank- DRives

Post by RiverRat » Nov 25 2014 7:29pm

Hey there. Im in the planning stage of building a pack for a bbs02 and have a configuration question for my battery build.

specs 200 sansung 25 r .

will 14s 14 p (51-8v-58.8v) work ok voltage wise?

Thanks
20141126_084023.jpg

User avatar
teslanv   100 MW

100 MW
Posts: 2675
Joined: Nov 03 2013 8:42pm
Location: Bellevue, WA - USA
Contact:

Re: New Bafang Crank- DRives

Post by teslanv » Nov 25 2014 10:51pm

14S will work splendidly. And 14 Parallel will give you OVER 100 miles of range.
Jealous. :evil:
DD Hubs, Batteries, Controllers & Custom Ebikes.
http://westcoastelectrics.com
West Coast Electric Cycles
Bellevue, WA
USA

RiverRat   1 W

1 W
Posts: 54
Joined: Jul 19 2014 6:52pm
Location: Cairns Australia

Re: New Bafang Crank- DRives

Post by RiverRat » Nov 25 2014 11:30pm

Thanks mate . Ill move on to working out how to put it together now.

User avatar
tungsten2k   100 mW

100 mW
Posts: 42
Joined: Sep 24 2014 10:20am
Location: San Francisco

Re: New Bafang Crank- DRives

Post by tungsten2k » Nov 26 2014 1:53am

Wow, that'll be nuts. I'd probably consider using the cardboard tube separators or plastic grid holders to ensure a short doesn't occur. That's a lot of energy between your legs :-p

I'd also be curious how well the controller holds up to the 14S pack voltage long-term. Teslanv has a 14S setup and has run a few hundred miles but I've not heard of someone whose ran long term at that voltage (but I'm still searching). The caps are rated for just 63V so 14S at 58.8V is certainly going to be stressing them. You may want to consider charging to 4.1V (57.4V) to increase longevity of the cells, plus give a touch more margin on the controller components.

That'll be a fun bike :)

-=dave
Last edited by tungsten2k on Nov 29 2014 3:38pm, edited 1 time in total.
335miles@21feb2015 on KHS FXT Pro 2001 full suspension/BBS02/750W/25A/14S2P/10Ahr/40C/518Whr HobbyKing LiPo/iCharger 308Duo/custom battery box/no BMS/RF Alarm/46.4lbs(21kg) - built Oct 2014. Bike components: Hope M4 Mini hydraulic brakes (no brake switches)/Mavic Cross Land S-6000 tubeless wheelset/LP Composites B5 CF handlebar/Giant CF seat post/Thomson Elite stem/FSA ACB headset/Wellgo LU-313 pedals/KMC X9SL Ti-Nitride coated chain

RiverRat   1 W

1 W
Posts: 54
Joined: Jul 19 2014 6:52pm
Location: Cairns Australia

Re: New Bafang Crank- DRives

Post by RiverRat » Nov 26 2014 2:17am

tungsten2k wrote:Wow, that'll be nuts. I'd probably consider using the cardboard tub separators or plastic grid holders to ensure a short doesn't occur. That's a lot of energy between your legs :-p

Also curious how well the controller holds up to the 14S pack voltage. Teslanv has a 14S setup and has run a few hundred miles but I've not heard of someone whose ran a long term at that voltage (burin still searching). The caps are rated for just 63V so 14S at 58.8V is certainly going to be stressing them. You may want to consider charging to 4.1V (57.4V) to increase longevity of the cells, plus give a touch more margin on the controller components.

That'll be a fun bike :)

-=dave
Good point i was planning to under charge with those figures. Ill put the the build in th 25r thread and have some more questions with how im to go about it.

Thanks
Last edited by RiverRat on Nov 26 2014 2:45am, edited 1 time in total.

Fantomas   1 mW

1 mW
Posts: 15
Joined: Jun 14 2014 2:49pm
Location: Czech Republic

Re: New Bafang Crank- DRives

Post by Fantomas » Nov 26 2014 2:36am

58,8v a lot, I will not show correctly on the display. 14s not BMS. Motor at this voltage and maximum load skips performance. When the voltage drops to subside. I also 14s li-poly batteries.

leo99   100 W

100 W
Posts: 123
Joined: May 22 2014 3:10pm
Location: lausanne, VD, switzerland

Re: New Bafang Crank- DRives

Post by leo99 » Nov 26 2014 2:38am

Hi riverrat,
I have been running my bbs02 with a 14s pack of em3ev with no problem for 400 miles charging it at 57.4 v
2011 hardtail scott BBS02 750w with em3ev 14ah 29e pack - sold
Stealthy q100cst 201 with 14s 6ah battery at 15 amps
https://endless-sphere.com/forums/viewt ... 4#p1170421

User avatar
teslanv   100 MW

100 MW
Posts: 2675
Joined: Nov 03 2013 8:42pm
Location: Bellevue, WA - USA
Contact:

Re: New Bafang Crank- DRives

Post by teslanv » Nov 26 2014 8:28am

I suspect there are many BBS02 users running em3ev's 14S packs. I don't think 58V is anything to worry about, as long as you are not riding it on the throttle hard for long periods and overheating the motor.
DD Hubs, Batteries, Controllers & Custom Ebikes.
http://westcoastelectrics.com
West Coast Electric Cycles
Bellevue, WA
USA

cwah   10 GW

10 GW
Posts: 4185
Joined: Jul 24 2011 5:42am
Location: Between paris and london

Re: New Bafang Crank- DRives

Post by cwah » Nov 26 2014 9:50am

I also run it on 14s no problems at all. It goes down to 54v under load anyway. So nothing to worry about
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

User avatar
John Bozi   1 MW

1 MW
Posts: 1861
Joined: Apr 09 2013 1:46am
Location: Brisbane, Australia
Contact:

slow off road

Post by John Bozi » Nov 26 2014 1:58pm

could someone please tell me

1. what's your top speed is in granny gear?

I am guessing 20kmh...

2. How does it go off road? any chain dropping or issues with bending cranks or bb or something?

thanks

leo99   100 W

100 W
Posts: 123
Joined: May 22 2014 3:10pm
Location: lausanne, VD, switzerland

Re: New Bafang Crank- DRives

Post by leo99 » Nov 26 2014 2:16pm

I don't exactely know what is my max speed on granny gear but 20kmh sounds right as for off road i mainly stay on the road but when i go off road the only problem is the chain dropping some times but i m planning on putting my front deraileur to solve that problem
2011 hardtail scott BBS02 750w with em3ev 14ah 29e pack - sold
Stealthy q100cst 201 with 14s 6ah battery at 15 amps
https://endless-sphere.com/forums/viewt ... 4#p1170421

User avatar
John Bozi   1 MW

1 MW
Posts: 1861
Joined: Apr 09 2013 1:46am
Location: Brisbane, Australia
Contact:

pedal strike

Post by John Bozi » Nov 26 2014 3:14pm

you could try the race face and choose your best t count, just need the adapter, no guide needed

Image

However my set up is much more complex as I want this to run with my rear hub too which is in a small 20" wheel.

I was told by emax that I can't use my custom crank set up... (which I spent over $200 on!)

I am guessing its the spider... the bafang crank needs it connected to the drive shaft...

Image

the bafang cranks look too hollow to shorten...

Image

the drama continues
edit:
hold on

would these unicycle cranks fit?

http://www.ebikes.ca/shop/uni-shop/cran ... ss102.html

User avatar
Geebee   1 kW

1 kW
Posts: 471
Joined: Jan 13 2007 12:05am
Location: Hobart, Tasmania, Australia

Re: New Bafang Crank- DRives

Post by Geebee » Nov 26 2014 5:21pm

102mm is very short (but look usable), I have used 155mm and they are nice (on a recumbent trike), the 110mm I tried did not alow a lot of torque to get moving.
If you don't mind the DIY finish look grab a kids 24" MTB crankset as alot are 155mm and cheap, cut away the spider and tidy up with grinder and sander.

k-harvey   100 W

100 W
Posts: 265
Joined: Aug 05 2011 4:47pm
Location: New Zealand

Re: New Bafang Crank- DRives

Post by k-harvey » Nov 28 2014 2:22pm

Have many members used hub geared bikes for cyclone or bafang crank drives, as riding in town with derailer going to a lowest gear from a high gear would be better with these, as it is with my nuvinci hub. Can all hub geared bikes go from top gear to low while stationary as nuvinci .

User avatar
Geebee   1 kW

1 kW
Posts: 471
Joined: Jan 13 2007 12:05am
Location: Hobart, Tasmania, Australia

Re: New Bafang Crank- DRives

Post by Geebee » Nov 28 2014 6:43pm

I have an 8 speed Alfine hub on a Tonaro crank drive, you have to stop the motor to change gear, but you can change gear stationary, most hubs are like this, I have Sram 7 speed and Sturmley archer 3 speed that can be changed whilst stationary as well.

Melbourne   100 W

100 W
Posts: 123
Joined: Jan 19 2013 2:44am
Location: Melb,Aust

Re: New Bafang Crank- DRives

Post by Melbourne » Nov 28 2014 7:45pm

Got my bb02 750w25A last week...from btn aliexpress delivery took 10 days....

What is the easier/quick way to limit the power to 20Amp as my Lifepo4 battery will not like 25a?
IMG_20141129_113421.jpg
1. BH Neo Xtrem
2. Cellbike Bafang Crank bbs01 36V350W
3. Cannondale Bad Boy bbs02 750W 48v15Ah
Melb,Aust

User avatar
John Bozi   1 MW

1 MW
Posts: 1861
Joined: Apr 09 2013 1:46am
Location: Brisbane, Australia
Contact:

don't exceed 820w

Post by John Bozi » Nov 28 2014 8:12pm

750watt / 48v = 16amps

get a watt metre and keep your eyes on not drawing hard would be easy, keep your watts to the continuous rating... of 750-820

20amps x 41 lvc = 820w and then once you know the settings that might limit it to that on the display stick with them...

garman1987   1 mW

1 mW
Posts: 16
Joined: Nov 26 2014 5:53pm

Re: New Bafang Crank-drives

Post by garman1987 » Nov 28 2014 9:13pm

GUI13 wrote:for information ...

controller
Image

and new connectors


Image
Sorry.. can you explain how to remove that? I feel it blocked and I can't understand how to push it out

k-harvey   100 W

100 W
Posts: 265
Joined: Aug 05 2011 4:47pm
Location: New Zealand

Re: New Bafang Crank- DRives

Post by k-harvey » Nov 29 2014 1:15am

Thanks Geebee,
-- my next worry is how long would it the 8 speed last etc , We always take power off changing gear& my usual power is the 500w .Seems Buying a whole bike with these gears in (8 speed)here is cheap compared to trying to to buy a hub with gears only here in NZ on line.

Post Reply