battery insulation fabrics? - Page 1
Forum section: electronics / projects

author: coppercone2
author_rank: Super Contributor
timestamp: April 12, 2024, 07:37:54 pm
content: I need to remake the battery for a fenix flashlight. I think I replaced the LED in there a while back with extra brighter ones, but the old battery is not in stock anymore.I took it apart and it looks like a cylinder cell made of 6x 18650. I found the triangle bits to spot weld the pack together but I need some of that green stuff in raw sheet form to insulate the battery.I am not committed to this and I would not mind if there is superior material like maybe a kapton based one or something from a manufacturer like 3m with high temp adhesive or whateverWhat are some good options? So I am not tempted to reuse anything in the old cell. Also some semi compressible foam spacers, maybe..I also have some very high temp flurosilicone rubber sheet that is quite expensive and durable, but I still wanted at least a few pieces of the tougher fabric/cardboard/card whatever it is stock that is adhered on, to guarantee protection against cuts from the tab.Perhaps there is a superior material that uses fiberglass or kevlar + something? that should dull out any edge that tries to cut into it, though I suspect its overkill

author: p.larner
author_rank: Frequent Contributor
timestamp: April 12, 2024, 07:51:00 pm
content: try some nomex sheet,its a good insulator and as tough as old boots.

author: Gyro
author_rank: Super Contributor
timestamp: April 12, 2024, 08:01:02 pm
content: The stuff used for reusable non-stick baking sheets and liners oven bases is pretty tough. It has a woven glass fiber construction combined with some form of high temperature silicone. The woven construction means that doesn't tear, or puncture easily. Eg.https://www.amazon.co.uk/X-BLTU-Silicone-Reusable-Reusable-Professional/dp/B07Z93X3GJ/It's relatively cheap too.

author: coppercone2
author_rank: Super Contributor
timestamp: April 12, 2024, 08:35:11 pm
content: it needs to stick with whatever crap the factory has that sticks to it and also preferably from a known manufactuter like 3mi wish digikey sold it. idk why china has the market on stupid paper that you absolutely need for batteries. there should be 3m version of this crapits ridiculous if you try doing something with high performance batteries its like going to sears instead of home depot for tools

author: coppercone2
author_rank: Super Contributor
timestamp: April 12, 2024, 08:55:45 pm
content: I get some high temp kapton adhesive sheets from digikey too to put over chassis covers why notbut I don't see any god damn paper or something marketed towards batteries.usa its only been 20 fucking years since the 18650 proliferated why are you acting like its not here to stay or that we don't use it. i know lets trust china withu ebike batterieshere is a spec. shit to stick on some batteries that you will put in some bullshit device that takes a few amps

author: BrokenYugo
author_rank: Super Contributor
timestamp: April 12, 2024, 09:52:08 pm
content: Fish paper? A few layers of mylar transformer tape? Ask 3M what they recommend for the application?

author: coppercone2
author_rank: Super Contributor
timestamp: April 12, 2024, 10:10:56 pm
content: Its for a home flash light I don't think they will help and I ordered the chinese stuff because I am not starting a major research project over a old flashlight but still you would think this would be front page sales because the batteries are taking overcombined with some flurosilicone elastomer sheet and also high temperature silicone adhesive kapton, it should make the pack slightly better then what it was