LiPo fireproof wrap?

[Boyntonstu]

Wrap the batteries when you are not riding and it may keep the surrounding area safe from a LiPo fire.

REFRASIL® Silica-Based Woven Textile products have been specifically designed for high temperature use.

REFRASIL® products are amorphous silica woven fabrics, textiles, non-woven blankets, and bulk fiber and fibers designed for high temperature use.

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REFRASIL® textiles provide excellent thermal and acoustic protection. These high-temperature resistant textiles products insulate and provide continuous protection in environments up to 1800°F (982°C), while maintaining their strength and flexibility.


REFRASIL® Silica-Based Woven Textile products have been specifically designed for high temperature use.

REFRASIL® products are amorphous silica woven fabrics, textiles, non-woven blankets, and bulk fiber and fibers designed for high temperature use.

The REFRASIL® product line is available in a variety of product forms: Woven Fabrics, Woven Tapes, Non-woven Blankets, Bulk Fiber, Modules, Braiding Yarns, and other specialty forms such as Sleeving, Rope Gasket, and Cord.

REFRASIL® textiles provide excellent thermal and acoustic protection. These high-temperature resistant textiles products insulate and provide continuous protection in environments up to 1800°F (982°C), while maintaining their strength and flexibility.



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http://www.ebay.com/itm/Silica-Clot...135588?hash=item25a7ed4864:g:5CoAAOSw9NxTvf7J

 

[LiFeCycle]

Probably a good idea - however, just because the product can insulate to 900 degrees doesn't mean that lipo is safe because it's in the bag.

When lipos go up in smoke, they emit quite a lot of combustible gas. Even though the bag may shield you from the temperature of the battery itself, it can't do anything about the fire being spewed out.

If you want to see this in action, look up a video on youtube by the hacksmith called 'flying like iron man part 11: not so safe safety tests' in which he overcharges a lipo battery inside a fireproof bag, resulting in a large fireball.

 

[liveforphysics]

Most Silica based stuff when in contact with arc flashing becomes a highly conductive plasma that enables more current to feed the plasma in a positive feedback loop.

Nomex is the stuff to use.

 

[dogman dan]

900 degrees is pretty cold for fire. In ballooning, we use the nomex, on the part of the balloon that's inches from an 18 million btu size fire. That's real fire,, if you are 3 feet from it, it can heat your pants zipper enough to brand your dick. You learn very fast to dress right to crew a hot air balloon.

Lipo safety is not created by putting it in a fire proof box, it's done by putting it in a box that completely prevents chafing and dings from compromising the cells, and by a charge and discharge regimen like the one you practice.

Go easy on them, and after initial testing to weed out defects, you have a very safe lipo pack. Then all you need is to make them crash proof, protect the packs from physical damage from the bumps of the road, up to and including the crash where the bike flips 3 times while you flip once.

And then,, the cherry on top,, never store them or charge them where you would not build a fire. At the very least, this is a piece of tile on the table, and nothing close to the table that can burn easy. I'm lucky, my house has the usual useless for heating the house fireplace. Each 500wh pack is also inside a metal ammo can.

 

[Drunkskunk]

As LFP was pointing out, At some temp just below the Draper point, the silicon will be ionized and start to conduct, making a bad situation with[strike]Lipo[/strike] any electrical device even worse. Nomex is a better material for this. However, Fabric isn't going to keep the battery from exploding.
This is the equivalent of wrapping a gas tank in Nomex to prevent gas tank explosions. It's not really going to help much. It can contain the heat a bit, and channel flame in a safe direction. But you still have a huge amount of volatile energy that needs to go someplace.

This video is a single cell from a 5000mAh pack that I popped just to see what would happen. Had this been in a bag, it would have shredded the bag. had this been in a tight fireproof box, I would have had a bomb.
[youtube]NzUla1udKuA[/youtube]

 

[Boyntonstu]

[youtube][/youtube]

As LFP was pointing out, At some temp just below the Draper point, the silicon will be ionized and start to conduct, making a bad situation with[strike]Lipo[/strike] any electrical device even worse. Nomex is a better material for this. However, Fabric isn't going to keep the battery from exploding.
This is the equivalent of wrapping a gas tank in Nomex to prevent gas tank explosions. It's not really going to help much. It can contain the heat a bit, and channel flame in a safe direction. But you still have a huge amount of volatile energy that needs to go someplace.

This video is a single cell from a 5000mAh pack that I popped just to see what would happen. Had this been in a bag, it would have shredded the bag. had this been in a tight fireproof box, I would have had a bomb.


Have a temperature activated fire extinguisher pointed at your battery. ( similar to a sprinkler)

[youtube]d3rmz8V_SKA[/youtube]

 

[PaulD]

Most Silica based stuff when in contact with arc flashing becomes a highly conductive plasma that enables more current to feed the plasma in a positive feedback loop.

Nomex is the stuff to use.

Agreed on Nomex. Interesting about silica.. why are fuse elements surrounded with silica sand?

 

[liveforphysics]

Most Silica based stuff when in contact with arc flashing becomes a highly conductive plasma that enables more current to feed the plasma in a positive feedback loop.

Nomex is the stuff to use.

Agreed on Nomex. Interesting about silica.. why are fuse elements surrounded with silica sand?

That's why I used sand initially myself in testing, it has acceptable function and is dirt cheap. Sand has a huge latent energy of fusion conversion to sink energy, but in my own testing with fuse elements, sand and glass alike both were comparatively explosive/major events compared to Nomex right up against the fuse element itself Nomex somehow quenches plasma and avoids burning through somehow even though it's a bunch of delicate organics vs the robust ceramic materials in sand/glass etc. I'm the wrong guy to ask with respect to how Nomex works so well, I've just done the testing and repeatedly been blown away by the performance. Don't take my word for it, test everything yourself but at least include Nomex on your list to test, and my hunch is you won't be disappointed.

 

[Drunkskunk]

I found this video after my dad melted a plate in a microwave with a spoon. There is a great explanation of why it works at the end of the video. This happens with any silica based ceramic.

[youtube]cskB5c0mJ58[/youtube]