Search found 126 matches

by snath
Apr 01 2016 6:18pm
Forum: Battery Technology
Topic: 18650 battery Kit development and discussion[testing done]
Replies: 198
Views: 31481

Re: 18650 battery Kit development and discussion

Thanks for the bumps. As mentioned in our private emails, so far so good with the builds. My wife and I have put many miles/charges on the three packs I've completed with no problems. I've two more (10s4p) builds in progress using the simplified procedures outlined in my last posts. Unfortunately, w...
by snath
Oct 09 2015 9:46am
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Sounds like it could prevent an "oops" moment.

The potential product liability is why I never pursued making kits. Too bad, the packs are really simple to build and maintain.
by snath
Sep 29 2015 9:57am
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

I don't use any thread locker. The Nylon or PVC that I make the spacer bars out of grips the screws grips the screws very tightly..
by snath
Sep 13 2015 3:31pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Hi, The previous poster asked about compression strip thickness/amount of squeeze. Here's my take after some half dozen batteries: It's not critical but you do want a definite amount of squeeze so that you make good contact. I would shy away from thick rubber/foam and stick with the 1/6" Poron or 10...
by snath
Jul 18 2015 2:20pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Ok, Here's a way to make bus bars without much tooling. Alls required is an embossing die from a craft store like, in the US, Michaels or Joann Fabrics. The one we want comes in a package of 3 and looks like this: IMG_2508.jpg The dimples are spaced about 10mm apart so we want to cut off every other...
by snath
Jul 17 2015 12:32pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Hi all, I'm about to begin my 4p batteries but I think I'll make a couple of changes to the materials I use. First, I'll use 3/16 inch PVC (I used nylon on the last one and didn't like the way the holes tapped out) rod for the spacers and 2-56 screws to hold everything together. I think this will pl...
by snath
Jul 17 2015 11:12am
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 709
Views: 160535

Re: BRAND NEW CELLS 18650 LG/SAMSUNG/PANASONIC from 2,79$ EA

I'm afraid that tumich doesn't know much about customer service and that's what has lead us to this sorry state. A buyer informing a seller that, in the buyer's opinion, something is wrong with the product and offering a solution is a first step in basic conflict resolution, and that's what I did. T...
by snath
Jul 16 2015 11:48pm
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 709
Views: 160535

Re: BRAND NEW CELLS 18650 LG/SAMSUNG/PANASONIC from 2,79$ EA

I'm not sure how to bench test them and produce beautiful graphs as some can do on ES, but I can tell you this, 50 them are in a pack as we speak http://endless-sphere.com/forums/viewtopic.php?f=14&t=57810&p=1072830#p1072396 , and I can assure you, they will get a real world workout from a 69-year o...
by snath
Jul 16 2015 11:27pm
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 709
Views: 160535

Re: BRAND NEW CELLS 18650 LG/SAMSUNG/PANASONIC from 2,79$ EA

The cells came by sea and they took, as I mentioned, 55 days from order placement to my door. It was sort of fun tracking them using the tracking number that tumich provided. It, of course, wasn't active while the cells were at sea but after a while, the US Postal Service tracking system picked them...
by snath
Jul 16 2015 10:28pm
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 709
Views: 160535

Re: BRAND NEW CELLS 18650 LG/SAMSUNG/PANASONIC from 2,79$ EA

I received 100 Panasonic cells well packaged in 55 days from order placement to my door in Atlanta, GA USA. I'm happy to receive the cells but am very displeased with the seller's performance in honoring my request for cells that had never been welded. Despite telling me that I could have cells that...
by snath
Jul 15 2015 12:57pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 07/15/15)

A Gaffer Tape https://en.wikipedia.org/wiki/Gaffer_tape build. This is the most simple build that I've made yet. It's taped together....... Well, the box (sides 093, ends and top and bottom .062 polycarbonate) joints are taped up but the cell holder matrix, spacer bars, bus bars, and Poron foam comp...
by snath
Jun 17 2015 1:25pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

It's been a while since I posted anything but I'm building a couple of 10s4p batteries and another 10s10p (as soon as the cells I ordered from Tumich ( http://endless-sphere.com/forums/viewtopic.php?f=31&t=61608 get here). So far, I've been very pleased with the builds Ive made. I've gotten a lot of...
by snath
Jan 22 2015 6:41pm
Forum: General Discussion
Topic: Fire at ebikes-sf
Replies: 70
Views: 5238

Re: Fire at ebikes-sf

TSAR wrote:My condolences.
This really sucks. Hope the store was insured...

If someone starts a collection, let me know, I'll throw in.
Me too.

Ilia is first rate.
by snath
Jan 02 2015 2:42pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

How is it holding up? And where did you get your compression strip and cooper strip? Happy New Year!! Both batteries are holding up well but I have to say, that I haven't a lot of cycles on them yet. Here's where I get the foam: http://www.mcmaster.com/#poron-urethane-foam/=vam1d3 And, here's where...
by snath
Jan 01 2015 3:28pm
Forum: Battery Technology
Topic: Holy grail of solderless 18650 is close but not idiot proof.
Replies: 54
Views: 10472

Re: Holy grail of solderless 18650 is close but not idiot pr

Off the shelf components can be built with mostly hand tools....... only one specialist part (the dimpling block) and you are in business.

Change any battery with a screwdriver.

http://endless-sphere.com/forums/viewto ... 14&t=57810

KISS is best!
by snath
Sep 11 2014 6:05pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

My version of dimpling tool. Now once I’m fully set up I can make strips if anyone needs them :) DSC08361s.jpg DSC08349s.jpg DSC08347s.jpg very good job! no CAD drawings, no XsSp descriptions. just plain dimples in a strip. All that's left to make a case are sides/bottom/top of polycarbonate, PVC, ...
by snath
Sep 06 2014 3:18pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Just use office-type rubber bands.... 107s are about .625 in. wide. You can trim them to width. Will work fine and you can change them out once a year. You may have to adjust (reduce) the spacer bar and side/bottom lengths a little; but not much because they are a little more dense than the poron.
by snath
Sep 06 2014 9:31am
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

ShA 34 sounds about right.
Just remember that ability to "bounce back" is just as important as hardness. The Rogers Poron products have that property.
by snath
Jul 12 2014 6:17pm
Forum: Battery Technology
Topic: Conductivity improving grease project
Replies: 109
Views: 11564

Re: Conductivity improving grease project

Ok Luke, here's a candidate for your conductivity improving grease. As I mentioned in this post http://endless-sphere.com/forums/viewtopic.php?f=14&t=57810 , i was planning on making a "stick battery" using these star-shaped bus bars: Dimpled stars.jpg . Here are the bars in a 10s5p battery built up...
by snath
May 27 2014 2:37pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

I'm stuck here. I removed the tabs from most of my cells already and soldered 40-50 poorly. I want to do the pack, but my end battery size is around 210 cells if I go the solderless route (reasons). I could pay for the materials to go solder-less or I could pay batteries plus to spot weld new tabs ...
by snath
May 23 2014 7:46pm
Forum: Battery Technology
Topic: no solder battery help
Replies: 25
Views: 1443

Re: no solder battery help

This method is nice and clean: http://endless-sphere.com/forums/viewtopic.php?f=14&t=57810 I really like the setup, and it's doable with my materials except for the 18650 spacer block. I can't find anything like that for cheap. The immediate problem is connecting the positive terminals for bulk cha...
by snath
May 22 2014 7:09pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Omg Snath!! Sweet!!! http://endless-sphere.com/forums/download/file.php?id=137874 I want! I want! Will you make me 11 of those? I can pay or trade stuff. :-) This bus bar is designed to use PVC tube (McMaster Carr Part No. 8749K61) as the spacer bar. It just fits a hole punched with a Roper Whitney...
by snath
May 22 2014 6:54pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

liveforphysics wrote:Omg Snath!! Sweet!!!

Image


I want! I want! Will you make me 11 of those? I can pay or trade stuff. :-)
PM sent.
by snath
May 22 2014 6:52pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

The copper is .010" thick. The dimple punch is .187" and the die plate is .040" thick with .0218" holes. Snath, I'm in the process of building my own "dimpler", but got confused with the die plate thickness - is it .040" or .010" as per your first post third picture description? "Here are the two b...
by snath
May 22 2014 5:39pm
Forum: Battery Technology
Topic: Another No Solder/Weld 18650 Build (Updated 03/09/2014)
Replies: 343
Views: 55018

Re: Another No Solder/Weld 18650 Build (Updated 03/09/2014)

Yeah, I bet there is a ton of fine fork with thw shape. I have reas both of you threads. There is a lot of irrelevant stuff posted by members abour air compresion and all that nonsense. As far as I remember you were working with acrilic or pvc not polycarbonate!? Could be wrong thou. Worked with bo...