California firefighters had to douse a flaming battery in a Tesla Semi with about 50,000 gallons (190,000 liters) of water to extinguish flames after a crash, the National Transportation Safety Board said Thursday.
In addition to the huge amount of water, firefighters used an aircraft to drop fire retardant on the “immediate area” of the electric truck as a precautionary measure, the agency said in a preliminary report.
Firefighters said previously that the battery reached temperatures of 1,000 degrees Fahrenheit (540 Celsius) while it was in flames.
The NTSB sent investigators to the Aug. 19 crash along Interstate 80 near Emigrant Gap, about 70 miles (113 kilometers) northeast of Sacramento. The agency said it would look into fire risks posed by the truck’s large lithium-ion battery.
Our town had to use an excavator and dozer to bury a Tesla car because it wouldn’t stop burning.
I read in a firefighter’s thread that the trick is to use a low pressure spray directly on the battery compartment. (It was a thread about Tesla cars not semis though so that might not apply)
The reason was you can’t actually put the fire out, it’s self oxidizing (it can literally burn underwater) so you basically need to wait till it burns itself out. Fortunately batteries only hold something like 1/10th the energy of gasoline and can’t release that energy as quickly so a fine light spray is enough to keep it from getting hot enough to catch anything else on fire including batteries in the surrounding battery modules.
Takes a long time, like hours to get it to a point they can move the vehicle and literally a couple weeks before the reaction completely fizzles out. They have special lots they tow them to where the car can fizzle itself out without damaging anything surrounding it.
Is water the best choice for a chemical fire?
Depends on the chemical, but it is an appropriate way to fight a liion battery fire though.
You’re fighting thermal runaway. Water is very effective at cooling and helps control the fire and keep the heat down. US DOT recommends water spray.
Maybe. Water is cheap, available in quantity, and non-polluting. Since a battery fire is self-oxygenating, I don’t think putting it out is something you expect. All you can do is take away the heat both to contain the damage and to eventually stop the reaction.
The water is non-polluting, the battery chemicals not so much
How much is this in Capri Suns?
950,000 Capri Suns
(200ml per Capri sun, 5 Capri sun per litre, 190,000 litres water)
But it would take a long time to open each packet and spray it on the fire.
There’s 5 200ml Capri Suns to a liter. At about 190,000 liters, we’re looking at about 950,000 Capri Suns.
Somehow those packets seemed a lot smaller than 200ml.
I went through “Bedrijfshulpverlening” (Dutch, if you want to run it through translate just in case I mess up the correct translation). I guess it’s business first responder or something.
When we were attending the fire training part and we were teached about fires, someone asked “what if there is a car fire”. They said: “starting petrol car fires can be extinguished with a portable extinguisher if you are lucky. But electric car fires, leave them alone. They seal the cars in special water-filled containers and leave them alone for two weeks. There are reports that even after the two weeks, when the car was retrieved from the water, the fire started again on it’s own. Firefighters really hate electric vehicles”.
business first responder
"alright, is everyone here? this is an all-hands meeting. Where is Joey? Is he in the bathroom again? He’s missed the last 3 meetings… Anyway. Top of the agenda, there’s apparently a fire, right over there. Fires are kinda hot and so we have been sure to stay a good distance away, as to not raise the temperature of everyone’s complimentary bottled water, handed out at this meeting.
Now it says here that we should tackle this situation as quickly as possible. Has anyone run the numbers by the finance team? We don’t want to spend too much on this. The big-wigs upstairs never think about the big picture, and really I don’t see why one fire is worth pivoting all our available resources. Samantha, yes?"
“Sir, the fire is growing at an alarming rate, shouldn’t we just postpone the meeting and focus on the fire?”
“See, that’s exactly the kind of thinking the execs have. But if we spend all our resources, cuts will be made, and jobs will be lost. Not mine, of course, but others. Did anyone do a PR analysis on us ‘putting out this fire’ versus just running a week-long ‘we are sorry’ ad campaign?”
(lol I just got the thought and ran with it)
In Amsterdam firefighters have thrown burning teslas in de gracht for a few days.
How much water does it normally take to put out a semi fire? Say a tire fire, engine fire, or the entire contents of a semi in flames? I couldn’t find the answer googling, but I did find that combustion engine semis burn at the rate of 7000 per year.
https://plattner-verderame.com/blog/the-dangers-of-truck-fires/
I don’t even think this is the right metric to use.
You aren’t putting a lithium battery fire out with water. You’re just keeping it at bay until the energy is all used up. The more energy, the longer it’ll take.
We might need new ways to deal with these fires, but it’s not like we can completely submerge a semi in water.
I wonder how encasing the object in a fire retardant foam would behave, although we gotta think about the toxicity of that too.
Edit: I wonder if you could even calculate the amount of water you’d need to hold it off upfront based off the battery size and current charge.
removedant?
lol
Remember that non electric cars are still dangerous too. Just think about how often you see a wreck that has cops, firetrucks, and cops all around it. That isn’t going to make the same level of national attention as an electric car burning would get.
There are a lot of reasons WHY news agencies disproportunatly show the downsides of green energy, and I’m hardly scratching the surface, but here’s my personal reasoning:
News sites like to over dramatize green energy dangers as they are funded by fossil fuel companies (ads). Theres a large amount of disinformation that they misleadingly tell people, take for example birds running Into windmills is something a LARGE amount of people know and think is an issue. However, statistically fossil fuels cause ~50x (iirc) more bird deaths per unit of energy than windmills due to birds being an apex preditor. Another example is that nuclear waste is a big issue that will prevent nuclear energy from becoming superior when that issue was solved several decades ago.Yes, elon sucks and some of his practices should be banned, but it’s still green energy and you can’t let it distract you from the benefits of all electric vehicles.
There are a lot of reasons WHY news agencies disproportunatly show the downsides of green energy
Electric cars are not “green energy” - that’s utter bullshit.
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the energy consumption of electric cars is about as clean as the power plant that produced said energy - if that happens to be a fossil fuel plant, it’s dirty as fuck, just with the pollution in a different location from where the car is driving If you have renewable energy, then yes, they can be cleaner, but:
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we don’t have enough (mineable) rare earths to replace even a sizeable fraction of the world’s car market with electric vehicles
- A great deal of electricity is produced by renewables these days, and that percentage increases every day.
https://www.eia.gov/todayinenergy/detail.php?id=48896
https://ec.europa.eu/eurostat/web/products-eurostat-news/w/ddn-20240221-1
- There’s plenty of lithium. Lithium batteries are also recyclable, unlike fossil fuels.
https://www.sustainabilitybynumbers.com/p/lithium-electric-vehicles
- Sodium ion batteries are also a thing.
As I was saying in my first comment: If energy is produced by renewable sources, then they can be clean, so there’s no argument here.
Re:
https://www.sustainabilitybynumbers.com/p/lithium-electric-vehicles
- the article focuses on lithium, which is not the only problematic material used in electric batteries
- the first source I checked (on total lithium in the world) was offline, so I could not confirm my suspicion that the author was talking about the total amounts including those inaccessible in the Earth’s mantle
- the author admits herself that we have “enough lithium for decades to come”, which is in-fucking-credibly stupid, because this planet has been around for billions of years, and one of the biggest flaws of mankind has been to empty a natural resource over a few decades “coz profits”. Creating a demand for a resource that would only make it last a few decades would create another clusterfuck like all the wars and blood shed over crude oil. As a matter of fact, for mining conditions, we already have this clusterfuck, if you look at e.g. how cobalt is mined in the “democratic” republic of Congo
Finally, like I asked another commenter: could you provide a source on EV batteries made without rare earths?
By the way - sodium requires salt, and that’s also limited on Earth. Knowing mankind, we’d extract locally (desalinification hurts the ecosystem there) and dump waste locally in another location (again, hurting the ecosystem).
My overall point is: the world’s car market is just too big and we need to shrink it, but mankind as a whole is too fucking selfish and stupid and short-sighted to accomplish that, and I WISH time will prove me wrong on that.
The dirtiest, least efficient coal power plant is still IMMENSELY more efficient than a car combustion engine. When you don’t have to make your energy generating device mobile, you can get a LOT more power from your fuel.
Maybe spend some time learning about a subject before you make claims about it. There’s less chance of looking like an ignorant fool that way.
Let me guess. You spend a lot of time in /c/fuckcars and therefore find ANY type of car bad and pointless?
First things first: Yours is a straw-man argument. I said that electric cars are not “green energy” because it matters how the energy is produced. You, however, argue for the better efficieny vs. combustion engines. I did not even MENTION combustion engines. So watch your tone, dumbass :p /s
Regarding your straw-man, I’ll bite:
Efficiency of an electric car is up to 65% including losses when charging. Efficiency of a Diesel powered car is up to 45%. Producing a liter of diesel costs about 1.13 times as much energy as is contained in a liter of Diesel fuel, which - even assuming 100% efficiency on winning that energy - is further bringing down the efficiency to 45% * (1 / 2.13 ) = 21% (one unit gained per 2.13 units invested). A coal power plant is at best reaching 45% energy efficiency, bringing the overall efficiency of an electric car down to 65% * 45% = 29.3%. That makes an electric car operating on coal generated electricity about 29.3% / 21% = 1.395 or about 40% more efficient than a Diesel powered car.
And this does NOT include that electrical vehicles are - due to the weight of batteries - around 50% heavier than combustion engine cars, and that battery life is much shorter and then generates a lot of electronic waste.
Accordingly:
The dirtiest, least efficient coal power plant is still IMMENSELY more efficient than a car combustion engine
Not true. Numbers for the most efficient coal power plants are just about equal with the efficiency of the best Diesel engines. But even moderate Diesel engines stay around 40% efficiency, whereas coal plants can be in the 30%-40% range easily.
When you don’t have to make your energy generating device mobile, you can get a LOT more power from your fuel.
- generally, larger generator = better efficiency, yes, however:
- see above: this does not necessarily hold true when the batteries increase the total weight of your car by 50%
While - all things considered (I honestly did not expect the production of Diesel to be quite so energy-inefficient) - electric cars fare better if driven at constant speed (or with good energy recuperation mechanisms on braking) and not taking into account the battery life, energy investment into that and chemical waste produced on production / disposal, they are far from getting “a LOT more power” from an “IMMENSELY more efficient” power plant.
Maybe spend some time learning about a subject before you make claims about it. There’s less chance of looking like an ignorant fool that way.
Likewise.
Not this nonsense again. 60% of EV owners have solar panels for starters
Secondly, they’re becoming increasingly less reliant on rare earth metals and all that can be recycled anyway
Their battery can be used for v2g to assist solar and further transition
Finally, they’re incredibly effectively compared to combustion.
In comparison to combustion and hybrid, they’re way cleaner over the entire life
And now with sodium batteries coming into the market, they’ll increasingly become so.
Are they as clean as bikes? No
But not everyone wants to be isolated within 5km of public transport and their home.
I’d have to travel 2 hours by train to get to work, and wouldn’t be able to go mountaineering or hiking anymore
Also, what’s with the nonsense about there aren’t enough mineral resources.
EVs don’t need to use lithium batteries. The technology can evolve with any battery chemistry or power source.
Whereas gas or hydrogen is limited to those two options permanently
Hydrogen in particular has absolutely s*** efficiency in all parts of the process. It’s only clean if you ignore the high energy wastage
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Solar panels need to run for a couple of years before they produce net energy considering the energy invested into production
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Source on battery production being less reliant on rare earths?
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Speak English, please - I am not looking up abbreviations to argue with you
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See my other reply here: https://lemmy.world/comment/12349903 Efficiency of an electrical car is better, but absolutely not “incredibly” better, as per the numbers I checked while writing that comment
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How much cleaner EVs are, depends on the source of energy mix (which at charging stations outside your home, you can hardly control) - if renewable energies are used, they are certainly cleaner. If fossil fuels are used, they are at best (not counting the waste from battery production and disposal) as much cleaner as the efficiency improvement (which is about 40% over Diesel engines, by what I calculated from sources that were acceptably credible for writing an internet comment as opposed to a scientific paper)
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I was not speaking about “mineral” resources, I was speaking about mineable rare earths. Because there are plenty in the Earth’s mantle, but we can’t get to those.
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Again, source please on how EVs do not need rare earths for batteries
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Agreed for the time being, but if research allows to improve the process for generation of hydrogen, it could be a cleaner combustion fuel
In summary: I am not arguing for combustion cars, I am arguing against EVs not for individual use cases, but as a “this solves all problems with combustion engines” - because it is not a solution applicable to the world market for personal mobility.
The best solution is a proper public transportation system - good bus connections and trains that can operate “by wire” without the need for batteries.
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See, that’s why I’m so glad they cleared a whole forest in a water protection area to build their german gigafactory.
Water and trees are totally overrated.
s/
deleted by creator
I wonder, would some quickly deployable heat barrier to surround it that can be filled with water once work? Kind of like dunking it a pool, except kind of backwards in that the “pool” is deployed around it and then filled?
I’m not sure how you just build a pool that doesn’t leak and can hold the weight of the water…
You couldn’t build it and get it filled fast enough. Also with a 1k degree battery a lot of that water is boiling off instantly.
Hmm, yeah, good point. What if you throw a bunch of dirt or sand on it from a truck filled with it from a distance until it’s covered? Like one of those things that poke up from wood chippers and launches the chipped wood into a higher truck, but redesigned to throw dirt or sand at a burning EV from a dump truck at a safe distance?
Maybe don’t use water to put out a fire that can’t be put out with water. Aren’t these supposed to be professionals?
For as much as people want their Musky circlejerks. This is really just a problem with the switch the EVs that people aren’t willing to accept.
There is no way to really stop an EV battery fire.
The batteries in these cars are made up of several cells, packed into a watertight, fire resistant box. When just one of those cells goes it’s over. It can create a chemical reaction that can ignite the cells without the need for oxygen, pure heat will set them off.
The only real way of dealing with them is to let them burn themselves out, and even after that they aren’t safe and could reignite.
The way to stop them is solid state batteries
Or maybe just good guys with Li-ion batteries.
What we really need is POCKET SAND!
It’s not the electrolyte that’s the issue, it’s the lithium. Solid electrolyte batteries wont make any difference. Unless by solid state you mean, no chemical reaction and we just switch to electrostatic cells, but that is nowhere near viable.
I had been told that solid state batteries are far more stable and less likely to have thermal runaway. Is that just bullshit?
It’s less likely, but if they do get lit on fire then you still have a class D fire on your hands. Unfortunately with car accidents and that much energy being stored in one place, fires are going to happen.
Supposedly there are non lithium solid state batteries, but I’m not aware of any commonly available for EVs
You’ll take my spinning platter batteries from my cold, dead hands
that sounds great, where can I buy one?
Let me know if you find out
honestly, i don’t expect an answer. New battery tech gets announced every year, claiming to revilutionize energy storage. None have made it to market in any meaningful way, if at all. Lithium batteries hit the sweet spot of price to performance, and nothing else can compete. Looking forward to the day that changes.
So, you actually can buy solid state batteries now at least as external battery packs to charge phones and whatnot, but they’re still lithium based,
Flooding the batteries with water is the best way to put out a lithium-ion battery fire.
Isn’t oxygen deprivation (usually through burying) a much faster method?
Maybe for smaller things, a regular car maybe.
But by the time a suitable digging machine arrives on scene and digs a big enough hole for a semi it’d probably be faster to flood it with water. Not to mention what might be underneath the ground, so they’d also have to spend time determining if there’s any gas lines or whatever before they dig so they don’t make a much bigger problem
Do you volunteer your backyard for such burials?
Sure.
Sure you would, now. It’s easy to be virtuous when the only things at stake are fake internet points.
I’d love to see you show the same heroism when an excavator in fire department livery comes to your house, rips up your front lawn, damages your water line and underground cables, potentially damages your basement’s walls, and carries off two cubic metres of soil to put out somebody else’s vehicle fire somewhat faster than water would. I’m sure you’d feel great about the damage you’d have to get fixed, even if you ignore the cost. Or do you think that fire departments would just buy dumptrucks to haul soil to fires on the off chance that the reporter correctly identifies the involved vehicle as having a lithium battery?
It’s not ideal, but water with fire retardant is the most practical solution.
How many lithium ion battery fires have you put out?
Two.
The best policy is to not puncture batteries, and train others to not do so.
The next best is to know to smother them.
Anyone dealing with batteries would have. It is more common than you think and not just people being keyboard warriors.
AFAB?
all fires are bad…?
