Sorry, but biased on what? The man here posted things that are not completly truth. He point that my design is huge when in fact hes just a hair smaller. If thats biased, take a calculator. He says that shipping will cost more, well, check usps prices with the ones on my webshop. Have in mind that my prices include packaging etc. Where is my biase here? My price is a monopoly? WTF does that even mean? When you buy cells, do they cost the same? Or perhaps more power dense ones are more expensive? The price reflects product. If you dont spend much time and finances in developing it, it might be cheap but it will most definetely be worse.
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Then why are you posting here after 100 comments?
Why not? Just read hes first post, he makes false statements about my product and i defend it as i see fit. Have no bad feelings for this man, just clarifying sayed things that are wrong or inaccurate.
I just think it’s weird that you’ve comment on here several times since the topic was started and you’re just now deciding to be upset about the first post. I don’t wanna derail the topic more then it already has.
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I think he should add something that will be the compression material and not using the 3D print plastic. Foam. A reliable compressible On endless sphere people showed using thinner copper and stacking it showed better contact and less resistance than one thick copper contact.
There’s a lot of people who are doing well using magnets on the terminals to get compression. The magnets are somewhat conductive plated in copper n nickel but it’s pretty thin and people use copper foil layers between the cell n magnets.
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So I did a thing. CADding bug bit me hard today and thought of completing 1 more thing. I had the NESE tabs lying around so thought why not try out a @Winfly style 4P pack just for fun. I intend to use just braided copper directly without using tabs at all but that’s for next weekend maybe. So here’s what I got. It’s the same height as NESE btw(22mm). I think, I stayed true to how @agniusm designed NESE and combined it with Winfly’s idea.
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Nice Rendering. Tips: if you are using strips, since it’s rigid, you can fillet the corner instead of rounding the ends. That way the 3d printed piece will be have more volume and thus stronger layer adhesion. I’ve cracked a few by over tightening it and it always splits along the opening for the copper strip to pass through.
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Thanks, I was worried about that too. It’s in the printer right now, will come out in an hour or so. Whenever I have these suspect cases, I always put quite a bit of superglue and let it soak in. Never delaminates after that.
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yup. looking good and it has some bend. can’t wait to load test these packs to see how they will preform. They are rated for 40A but we will see.
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That’s awesome, so you are in fact using just the braided sleeve. You mean the braided cable is rated for 40Amps? maybe you can double it to get more amps?
Dude, you gotta give it a bit more gap, it will flex nicely.
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yeah the tin plated braided copper sleeve is 40A. I can give it a wider gap but that’s up to you to decide and depend on how flexible you want it to be. Also i think it can flex more if I make the opening wider.
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would continuous flexing of the braid cause fatigue over time and eventually snap it?
I guess that is to be seen. The same will hold in my setup too. Thankfully my board is not too flexible. But it will be interesting to see how long it lasts. Even when it breaks it won’t happen suddenly. If you open the enclosure every 2 weeks or so, you should be able to see it start to fray(if at all it does that)
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Yeah thats the worst case I was thinking of as well. but maybe it just may not happen if the flex is minimal like on the Hummie decks that it wouldn’t fatigue it all that much. Good question is how to accurately test it in a controlled environment I suppose
Edit:
Or I just test out the long term stress myself once these become available 
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just realized i missed answering something. my plan is to have both copper strip busbar and braided copper available. one for rigid, one for flex.
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It works! I like metal standoffs better than plastic. Tried both.
Along the length of the cell it is 71mm wide and laying flat the height is 22mm
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out of curiosity. this concept could be transfered to other formats like 2070,2170,26650 ect, but still with the same tab inserts, you could make a small profile for the tab so stay centered, but the actual pack hold bigger batteries. is that a dumb idea or workable?
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Should be workable. I’ve asked @winfly about it but at the moment the focus is on 18650s and once the designs are all finalized, tweaking it to 21700 or larger shouldn’t be as difficult
What is the strength like for the 3d printed parts, wouldn’t it be stronger and quicker to mill or just carve these out of solid stock.