Jun 8, 2016

Flame Arrestor Battery Charging Station - Ammo Box

The goal was to create a portable charging station that could contain a lipo fire and also prevent the fire from spreading while minimizing pressure buildup. Let me know what you think, and any thoughts on improving the design.

$20 Used 50 Cal Ammo Can - http://www.amazon.com/gp/offer-listing/B00NJ3JTCU 
$7.49 3M 499 Fiberglass Cloth - https://www.amazon.com/gp/product/B000BQSKQY
$5.47 Bronze Fine Wool Pad - http://www.amazon.com/HOMAX-PRODUCTS.../dp/B0000AXS0Q
$2.08 Gampak Connector - http://www.lowes.com/pd/Gampak-3-4-i...nector/3389324
Hood range filter (the filters that go over your stove)
$6 Lipo safety bag - http://www.banggood.com/RC-lipo-Saft...-p-938751.html
Double stick tape

$4.99 Bcase Cable organizer - http://www.banggood.com/Bcase-TUP-Ma...p-1023797.html
$5 2S, 3S, 4S, 6S extension cables - http://www.banggood.com/Lipo-Battery...-p-951866.html

Hole step drill bit
Rivet gun and rivets
1 3/8" Hole saw

The layering of the flame arrester from top down:
Hood range filter screen mesh
Fiber glass
Bronze wool pad
Hood range filter screen mesh
Stainless grating from hood range filter - this piece is riveted to the ammo can compressing the layers


  1. I really like what you did - doing something very similar. I've seen some tests and I think the fiberglass fabric might be too restrictive of the venting, so I may just use dense wool between the two screens, without the fiberglass. Also I think stainless steel wool might be more flame resistent, but I can't find it except for a huge roll on Amazon - so I'll try bronze too. Good ideas... let me know if you ever get to test it.

  2. Nice job Tri. How did you make those clean holes in the lid? And, could you describe what it took to make the rivets? Thanks

    1. Hi Steve, the holes were made using a hole saw made to cut metal, and the rivets were made with a rivet gun.