Hi All. Iam finishing with my first MTB board. So Iam solving how to fix Battery inside plastic case. Did You somebody use something like this?
I had a bunch of these at work so I tried one of these for my first box. It worked great but it was also a jump board so the foam started compressing and chipping away and turned to dust after a while.
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Thanx a lot for real experienece! So when I will find some foam with different properies, if it is possible it could work… correct?
Yeah absolutely. I currently use industrial strength velcro on the bottom and side wall of my battery, I screw the heat sink of my esc into the threaded part of my junction box enclosure, and fill the rest with bubble wrap or foam.
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That was also my plan but because of first experience with MTB and usage fesc plus i build vesc case as usual on tail. I was not sure how it will works in one box because of heat.
100% silicone has never failed me 
deals with vibrations rather well too
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I’ve got the esc and battery on one box together and no issues.
Silicone sounds like a messy but ideal solution. Ive always considered fully potting an enclosure but that scares me and would add a decent amount of weight.
Fully potting might be bit too paranoid unless you want to explore atlantis. I put one dab per P group usually and I have to bust out a whole gang of swears if I ever want to remove em. If mounted on the enclosure I can easly leave it upside down without anything falling out
Polyurethane foam breaks down with vibration. Neat idea in theory but not functional in our use-case. Silicone works, as does epoxy, but then it’s a few orders of magnitude harder to maintain your gear. Especially if you rip a wire somewhere.
Side note - There’s silicone foam sheets you can buy in bulk from seal and gasket shops. In fact, such shops will cut custom shaped parts for you in a variety of materials from polyurethane to silicone foam to neoprene rubber. I’ll probably be using sheets of that stuff for my next battery box.
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The expanding stuff would be ideal.
How bout one of these silicone foams?
Or is there something else?
I’m wondering about that…
The expanding stuff takes a set. As the pack is pressed against it tens of thousands of times it could start compressing the foam and the pack could slosh around.
As long as it’s closed cell (to not absorb water), doesn’t take a set, is non-flammable (to not contribute to a pack fire), and is a low enough durometer (but not too low), then I’m thinking just about any foam sheet/block can work.
But expanding foams? I’m not sure they will work well long term.
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I’m getting this to try. Will use it to fill all voids in 2 big batteries of 270 cells in tight boxes
Will test to make sure not conductive when uncured and also make sure all the battery ingredients (steel, vinyl, nickel,…) don’t inhibit the curing.
Expanding is ideal since fills all voids thereby holding more securely. Maybe helps pull some heat off too.
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