Search found 28 matches

by nippynoo
Feb 08 2016 5:20pm
Forum: Battery Technology
Topic: 18650 spot welding -how to- ULTIMATE REPOSITORY
Replies: 723
Views: 136305

Re: 18650 spot welding -how to- ULTIMATE REPOSITORY

Nickel is cheap, easy and corrosion resistant Zinc is corrosion resistant and a lot cheaper than Nickel. Look at the prices I posted above. It also offers less resistance than Nickel. Is there a Metallurgist in the house? :lol: Could be something to do with the Standard Electrode Potential when two...
by nippynoo
Feb 07 2016 5:52pm
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

Re: New 18650 with tag

Yes , but the controller is already in the ebike (Panasonic mid-drive, 250W, from 2011 era) so I'm stuck with that I'm afraid - unless there's a way of upgrading it, hmmm, maybe, but sounds difficult. At the moment I'm wanting to build a battery pack to replace the 26V 8AH unit on the bike. So the ...
by nippynoo
Feb 07 2016 5:44pm
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

Re: New 18650 with tag

The 3400 / 3500 mAh are 1C max cells, so you'd be ok (just) at 2.5A per cell. But that assumes your 250W bike really does only draw 250W from the battery. Some will draw more, especially for short periods. However, if you use an 8P pack you should be fine. That said, the 2900mAh cells are a popular...
by nippynoo
Feb 07 2016 1:56pm
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

Re: New 18650 with tag

Ok, I was getting off topic, but looks like any of the tagged 18650's from NKON in the above list will do for my 26V 8Ah replacement pack. With the Sanyo/Panasonic I could get up to 32Ah in the same physical volume (100mm x 100mm x 200mm) with a 7S11P arrangement (77 batteries). So thats four times ...
by nippynoo
Feb 07 2016 12:14pm
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

Re: New 18650 with tag

I hope i've worked this out correctly: 250W maximum continuous power (this is the UK and its an old ebike I'm restoring :( ). Pack will either be 8S4P or 8S8P construction So around 30V and 10A continuous from the whole pack , i.e. 2.5A per cell for 8S4P or 1.25A per cell for the 8S8P Does this lim...
by nippynoo
Feb 07 2016 9:35am
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

Re: New 18650 with tag

The rest depends on what your discharge/charge requirements are for the pack... I hope i've worked this out correctly: 250W maximum continuous power (this is the UK and its an old ebike I'm restoring :( ). Pack will either be 8S4P or 8S8P construction So around 30V and 10A continuous from the whole...
by nippynoo
Feb 07 2016 6:13am
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

Re: New 18650 with tag

So I've made a list of the 18650 cells that NKON offer with a tag option, to see if one stands out above the rest, but of course its a tradeoff, 1. Samsung INR18650-25R 2500mAh €3.95 http://eu.nkon.nl/rechargeable/18650-size/samsung-18650-inr18650-25r.html 2. Samsung ICR18650-26F 2600mAh €2.75 http:...
by nippynoo
Feb 07 2016 4:54am
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

Re: New 18650 with tag

My first thought is that RS is expensive - literally three times the price of the popular supplier, NKON in Holland: http://eu.nkon.nl/rechargeable/18650-size/samsung-icr18650-26f.html I see they've started offering a tagging option on many of their 18650 cells. There isn't a price next to the tag ...
by nippynoo
Feb 06 2016 9:09am
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

Re: New 18650 with tag

Maybe these aren't new - just new to that site. Looks like an excellent idea.
by nippynoo
Feb 06 2016 5:10am
Forum: E-Bike Technical
Topic: New 18650 with tag
Replies: 17
Views: 1319

New 18650 with tag

What do people think of these Samsung tagged 18650 's ?
Mfr. Part No.ICR18650-26F

http://uk.rs-online.com/web/p/specialit ... s/8801551/

Seems like they'd save a lot of spot welding.
I'm thinking about using 32 of them to build a 8s 10Ah pack.
by nippynoo
Mar 15 2015 5:12am
Forum: E-Bike Non-hub Motor Drives
Topic: New X-Max / TSDZ2 mid drive kit
Replies: 15
Views: 14160

New X-Max / TSDZ2 mid drive kit

Spotted this ... with built-in torque sensor,,, what do you think?
http://x-max.en.alibaba.com/product/601 ... motor.html
Anyone bought one?
by nippynoo
Sep 04 2013 2:56pm
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

Here's a pic of the BBS02
bbs02.jpg
bbs02.jpg (125.38 KiB) Viewed 2268 times
by nippynoo
Aug 21 2013 4:30pm
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

The old fashioned bottom brackets were just filled with grease??? Maybe a smooth bore would be better, but the new type of bottom brackets housing have threads at either end, which this bafang unit will unfortunately flatten the tops off, as soon as that lockring starts to wiggle loose, as the poor...
by nippynoo
Aug 21 2013 2:23am
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

You are correct. It has a lock ring that holds it on. bbs01b.jpg bbs01a.jpg Yes it uses a lockring. Hope these pics help others. Seems the lockring will do nothing to counteract any slop in the shaft. So, as said by others the shaft will have to be loctited/glued to prevent movement, and then its a...
by nippynoo
Aug 20 2013 3:02pm
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

This kit has a self supported BB within the bike bb shell. Not the same thing. No slop in bearings. The shell should lock up very well and not relying on the bikes bb threads to maintain bearing tolerances. It acts more as a solid. Filler, most any most likely will eliminate any slop between the tw...
by nippynoo
Aug 20 2013 8:05am
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

Typical LBS stuff. On a soft, not heat treated aluminum frame the threads could get beat up quickly if the the assembly is allowed to run loose and move around. If snugged down the movement will be kept in check and very little thread flattening should occur. If your worried about it just wrap tape...
by nippynoo
Aug 20 2013 7:40am
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

Sounds like pure BS too me because it is threaded on both sides of the bottom bracket in other words you have to thread it into the frame of the bottom bracket. Not true. The BBS01 just slides in. Then there is a nut on one side only. Watch this video and you'll see how the threads are not used.. h...
by nippynoo
Aug 20 2013 6:43am
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

Just been discussing the fitting of the Bafang BBS01 with a bike-mechanic at my LBS and he warned me that the bafang doesn't use the threads in the bottom bracket, only pressure plates at each end, so there would eventually be a tiny bit of free play, caused by the shaft alternately pressing on the ...
by nippynoo
Aug 14 2013 2:41am
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

Does anybody know if the 250W and 350W motors are the same physically, just with different controller settings, or if the 350W is different (I imagine bigger) than the 250W one? The 250W and 350W are the same size. Here's a drawing showing both : http://www.bike-emotion.org/BBS01%20tech.%20Zeichnun...
by nippynoo
Aug 13 2013 10:20am
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

Does anyone 'in the know' have any production information for the BBS02/BBT variants? When will they be available? Any links?

“BBS01”: motor type(speed sensor) - in production
”BBS02”: motor type(speed sensor with coaster brake)
”BBT": motor type (torque sensor)

Thanks!
by nippynoo
Aug 13 2013 9:39am
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

Does anybody know if the 250W and 350W motors are the same physically, just with different controller settings, or if the 350W is different (I imagine bigger) than the 250W one? The 250W and 350W are the same size. Here's a drawing showing both : http://www.bike-emotion.org/BBS01%20tech.%20Zeichnun...
by nippynoo
Aug 13 2013 9:34am
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

There are two reductions, the primary is a helical set of gears (seen at 2:22), Its not clear, but I will estimate the steel motor-sprocket is an 8T, and the other larger nylon gear is definitely a 32T (4:1). The secondary is a small pinion driving the larger diameter gear, and the secondaries do h...
by nippynoo
Aug 11 2013 3:42pm
Forum: E-Bike Non-hub Motor Drives
Topic: New Bafang Crank-Drives
Replies: 4435
Views: 667165

Re: New Bafang Crank-drives

spinningmagnets wrote:Does anyone know of any published pics of the internals? I am most curious as to whether it's an inrunner or an outrunner, and if the reduction gears are verified to be helical?
Answer = Inrunner
Video showing internal of BBS01 : http://www.youtube.com/watch?v=b68fOrwcOcc