|
Battery fires
I sat in on a very interesting lecture at the Royal Aeronautical Society (RAeS) about battery fires on aircraft.
The lecturer was from a US safety group. It had some really interesting films of what happens, It was essentially impossible to put the fire out. It also produced smoke which can fill the flight deck to the extent that no one can read the instruments. There is no on board equipment to effectively deal with the problem. A firm in the US is now producing devices that can put the fire out and this was demonstrated in the films.They are a sort of cushion that is put on the fire and a blanket to cover the whole fire. What are doing to have these devices on board ? |
Did they not demonstrate water?
Or would that render the product they are attempting to sell marketless. |
Was it a group that has something to sell ? - ah yes
|
They did demonstrate water, it does not work.
|
Are you talking phone battery fires or aircraft battery fires?
Submerging phones in a bucket/bowl of water is standard procedure for such occurences. There are many threads about cases on these forums. |
Submerging phones in a bucket/bowl of water is standard procedure for such occurences. Lithium battery fires: Why not water? This is probably what 4 Greens mentioned. https://cellblockfcs.com/libik-dry-f...MaAjhxEALw_wcB |
It is what I mentioned. Their equipment works on the films they show. It also shows water making the fire worse.
After hearing the talk I felt this is a major problem and we need to know if the kit on most aircraft is suitable. If not we need government getting things moving. |
Submerging phones in a bucket/bowl of water is standard procedure for such occurences. |
Lithium is not present in its metallic form in rechargeable Lithium Ion batteries.
Even if hydrogen were created you would have to create quite a quantity to create concentration that are high enough to be a danger except form maybe a small flame over the water where the gas is escaping. Now unless you light the bubbles coming up it's likely that it will just dissipate and mix with cabin air. Which is harmless unless you somehow produce big quantities. As the video above states the problem are the flammable electrolytes contained. |
Hi wiedehopf,
I wish the official answers all agreed. From BEA https://www.bea.aero/docspa/2010/f-p...k101208.en.pdf para 2.2 "Throwing water on a lithium battery fire can, however, revive the flames and make it more difficult to extinguish because of the reduction of lithium in water, which leads to the release of hydrogen, which is highly inflammable." So it sounds something like if you don't have anything else better - then use water to cool the battery and extinguish the flames in the surrounding materials. |
Any liquid is the answer, even vodka will do the trick. It will both cool and also quench the fire of oxygen. Lithium manganese oxide is not flammable in water and won't combust in water. Unless you throw in an oxidising agent :D So don't try and put one out with H2O2 or KMnO4
|
GR, don’t confuse “Lithium” batteries with “Lithium-Ion” batteries. ”Lithium” batteries, also known as Lithium Metal batteries are non-rechargeable, generally small, and are not very common on aircraft, although sometimes used by photographers. My Nikon DSLR came packaged with a free one. They are also sold in common sizes as an expensive alternative to Alkaline single-use cells. They are also common as “button” cells for watches etc. They contain lithium metal, which reacts with water. They do not tend to pose a fire risk on aircraft when contained in equipment, although there are risks to carrying them in bulk shipments, and have a significant dangerous goods code accordingly. ”Lithium-Ion” batteries, are the rechargeable ones used in mobile phones, tablets, computers, video cameras and power tools. Sometimes known as Lithium-polymer, or Li-Po. As stated earlier, they contain Lithium compounds, not Lithium metal. The best extinguishing method is to immerse in water - removing heat and preventing any further heat buildup. It is the heat that causes the fire. The heat is caused by the battery self discharging due charging fault or damage. The fire is not burning lithium, it is the flammable organic electrolyte contained within the cell that catches fire. This is why water works very well with this type of battery. As shown in the FAA video posted above, halon/BCF can extinguish the fire, but it does not halt the thermal runaway within, so it is likely the battery will re-ignite if not continually quenched or immersed in water. I agree that the report you quoted creates confusion. On one hand, the author makes the distinction between lithium and lithium-ion batteries, but then goes on to not appear to understand the difference when it comes to fire extinguishing. Hopefully we are now better informed 8 years down the track. |
Originally Posted by Ex Cargo Clown
(Post 10262178)
Any liquid is the answer, even vodka will do the trick. It will both cool and also quench the fire of oxygen. Lithium manganese oxide is not flammable in water and won't combust in water. Unless you throw in an oxidising agent :D So don't try and put one out with H2O2 or KMnO4
Even if spirits don't burn that well they burn well enough and burning liquids are just never fun. |
Originally Posted by wiedehopf
(Post 10262372)
Not sure throwing vodka on any fire is a good idea. I mean it'll extingish the original fire and replace it with an alcohol fire.
Even if spirits don't burn that well they burn well enough and burning liquids are just never fun. The scenario is this: the aircraft has run out of water and only has vodka. A laptop computer catches fire.... A great marketing campaign for the guys trying to sell that product mentioned earlier! |
Originally Posted by Derfred
(Post 10262932)
Why is it that I suddenly have an insatiable desire to test this theory mythbusters style? :O The scenario is this: the aircraft has run out of water and only has vodka. A laptop computer catches fire.... A great marketing campaign for the guys trying to sell that product mentioned earlier! |
scary
Just seen this on an Ebay item description for a portable battery bank, you know that you use to keep your phone battery topped up. The rating in the ad is 500,000mAH! Ad is at https://www.ebay.co.uk/itm/New-Power....c100005.m1851
Problems You May Encounter-Question: Why haven't I received the package yet?-Answer: There may be the following situations, please try one by one: (1) Parcels for international shipments may be delayed, you can use the tracking number to contact the logistics company or the local post office. (2) If it is inconvenience for you to collect the package in time, please contact the courier and ask for the location of your parcel. If you don’t mind, you can also contact us and we will help you solve the problem. -Question: Why does Power Bank have no print capacity(mAh)? -Answer: If we printing capacity, the product can not be allowed to transport by the plane, we hope you can understand this. |
I just tried to report that idiot to Ebay; after going round in circles on it's website for 10 minutes, I gave up.
|
Originally Posted by Capn Bloggs
(Post 10398306)
I just tried to report that idiot to Ebay; after going round in circles on it's website for 10 minutes, I gave up.
But then again, it's the TSA ... |
Originally Posted by groundbum
(Post 10398276)
Just seen this on an Ebay item description for a portable battery bank, you know that you use to keep your phone battery topped up. The rating in the ad is 500,000mAH! Ad is at https://www.ebay.co.uk/itm/New-Power....c100005.m1851
Problems You May Encounter-Question: Why haven't I received the package yet?-Answer: There may be the following situations, please try one by one: (1) Parcels for international shipments may be delayed, you can use the tracking number to contact the logistics company or the local post office. (2) If it is inconvenience for you to collect the package in time, please contact the courier and ask for the location of your parcel. If you don’t mind, you can also contact us and we will help you solve the problem. -Question: Why does Power Bank have no print capacity(mAh)? -Answer: If we printing capacity, the product can not be allowed to transport by the plane, we hope you can understand this. In fact the battery pack itself is labelled 238.5WH: https://cimg9.ibsrv.net/gimg/pprune....1478a96140.jpg At about 4V, this implies 60Ah, which is still complete codswallop. 6Ah would be closer to the mark. And that is the real reason they don't mark the capacity on them - if they tell the truth then they can't compete with the other scammers, and if they print their outrageous lies, they can't ship the battery by air. |
Originally Posted by groundbum
(Post 10398276)
Just seen this on an Ebay item description for a portable battery bank, you know that you use to keep your phone battery topped up. The rating in the ad is 500,000mAH!
Don't worry about it. The stated capacity is clearly fake. They say you can fully charge it in 10-12 hours with a USB--cable, so that would limit the capacity of the batterypack to around 24,000 mAH. Judging from the size of it, maybe even just 50% of that.😆 |
| All times are GMT. The time now is 21:57. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.