I'm designing an electronics prototype for a college project that will be buried in the soil in the middle of a field. So power is basically not available. I am adding a solar panel and want to integrate the controller as well as a lithium battery inside the enclosure. Since it will be in the field, I am thinking of potting the enclosure to prevent water inside the enclosure. Basically, I googled and duck duck goed lithium battery safe PCB potting compound and I found nothing. So I would really appreciate if someone could give me some suggestions. Thanks in advance.
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\$\begingroup\$ Exactly which Lithium battery are you intending to use? \$\endgroup\$– Bruce AbbottCommented Dec 22, 2021 at 2:10
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\$\begingroup\$ Are you sure it's a Lithium battery (not rechargeable)? Or is it a Li-ion battery (rechargeable)? \$\endgroup\$– Davide AndreaCommented Dec 25, 2021 at 0:49
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3 Answers
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Speaking of Duck-Duck , I was thinking of Tuck Tape, which has a great seal but I don't know about slow diffusion.
Then I found this.
https://www.duckbrand.com/products/paint-diy-tapes/hvac-tapes/silver-188-in-x-10-yd-1
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\$\begingroup\$ Thank you for the recommendation. Tape won't work to seal the enclosure we are using. \$\endgroup\$– GoolaCommented Dec 22, 2021 at 17:04
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\$\begingroup\$ be aware of thermal implications and you need a teflon plug to leak H2 \$\endgroup\$ Commented Dec 22, 2021 at 22:09
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You mean you want a recommendation for a material choice to use as potting compound ???
Burying it in neutral RTV would work great. It'd be waterproof until the apocalypse comes around. There's a million places to get such RTV, but here's a description so you get it right. The key word is "Neutral". Many RTV's outgas nasty stuff, you don't want those.
https://cht-silicones.com/products/adhesives/neutral-cure-rtvs-adhesives
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\$\begingroup\$ Thank you. You answered my question. \$\endgroup\$– GoolaCommented Dec 22, 2021 at 17:03
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2\$\begingroup\$ Well, then, do the right thing and mark this comment as "answered". \$\endgroup\$ Commented Dec 25, 2021 at 0:49
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A quick google search revealed the following results, that company and many others offer polyurethane potting compounds, and it seems to be a very common practice.
