300 Megawatt Tesla battery catches fire
drive.com.au
drive.com.au
Seeing a car battery burn kind of makes me understand why.
That's what they're supposed to do, though, according to Tesla[1]. The firefighters are there to pour water on the fire to cool it down and wait for the battery to burn and release its energy. This is what Tesla's manuals[1] say:
> If the high voltage battery becomes involved in fire or is bent, twisted, damaged, or breached in any way, or if you suspect that the battery is heating, use large amounts of water to cool the battery. DO NOT extinguish fire with a small amount of water. Always establish or request an additional water supply.
> Battery fires can take up to 24 hours to fully extinguish. Consider allowing the vehicle to burn while protecting exposures.
EV battery fires and their risk to firefighers are a national problem[2].
Also, you're expecting a lot from what are often volunteers who have little to no funding. I lived in a place where over $20 million was spent on police salaries each year, but firefighters and EMTs were all volunteers.
[1] https://www.documentcloud.org/documents/20805805-2014_model_...
[2] https://www.nbcnews.com/business/autos/federal-regulators-wa...
You really underestimate how much firefighters love to use the equipment "for realz". I don't know anyone who doesn't dream of running into a (concrete) parking garage to put out a vehicle fire, EV or not.
Also, nobody (at least in my district) is allowed anywhere near a vehicle accident without bunker gear. If we had to rotate new pairs of firefighters in every 30m when the SCBAs run out, so be it. The department has a lot of tanks. We also have ventilation equipment on all the engines and squad units.
Also also: We're the rural team. The city departments (with their million dollar fire trucks) are even more hard core. "Make no attempt to put out EV fire" is just nonsense.
Source: am firefighter
No that's not what they say. They say to keep it cool to prevent it from burning. You're misinterpreting those instructions.
But that is doing something other than just letting it burn. That's containing the damage, rather than letting the fire spread to everything around it.
https://www.tesla.com/sites/default/files/downloads/2016_Mod...
A link to a pdf is just a file download. There's not really an established way to pass that page anchor to an out-of-browser pdf viewer.
My guess is that the floor was poorly ventilated with complex access, rendering the access to the fire unnecessarily hazardous.
It may protect the structure but the issue here sounds more like firefighter safety.
Can you provide more info on this? I'm very casual on the topic from what I've read is kind of impossible to put them out. Sometimes they have to throw the EV on a water tank and let it sit there for days.
At a car battery scale, especially in a garage, that would require the use of oxygen masks, and evacuating anyone around, because there won't be much to breathe. Also, of course, the fire truck must carry a large amount of liquid or solid CO2 ("dry ice").
Using liquid nitrogen would be even more efficient, but even harder to provide at scale. Liquid nitrogen is cheap, but cryogenic facilities are not.
This is just ludditism. New technology brings out a combination of people afraid of The New and people trying to look smart by pontificating about new New and Scary failure modes.
That's exactly what they're planning. The problem is that the house might not react well to having such a fire in its basement.
They're planning to keep it cool? It sounds like they're planning to stay far away and do nothing.
ICE vehicles too catch fire all the time, It just seems your firefighting agency is not doing its duty.
I wonder if it would make sense to install these larger batteries over concrete "basements" or pits and have mechanisms to "drop" them — maybe flood the pit with water.
We already have houses burning down because people left the bacon unattended for a few seconds too long.
House batteries already have thermal management and fire suppression built in. Mount the battery on a brick or metal wall of your house as per the instructions and forget about the doomsday scenarios.
24 Hours after the fire started it is still listed as "Not Yet Under Control" with 10 vehicles responding.
Media release from Local Fire Department: https://news.cfa.vic.gov.au/firefighters-battle-large-batter...
[0]https://news.cfa.vic.gov.au/Images/UserUploadedImages/301/10...
If they only lose one container-sized pack, that's not too bad. If they lose two, that's not so good. If they lose the whole installation, this needs a rethink.
Come on. Stuff breaks, things burn. We don't want it to burn. We should take reasonable action to make sure it's engineered not to burn. But if it happens to burn? Meh. Let's not lose our shit about it and start banning critically important technology, OK?
You can get LFP to runaway as well, it's just a lot harder, requires far higher temperatures, and doesn't release nearly as much energy.
LFP is good for grid storage, though depending on what you're doing, if you don't mind a bit of watering (or catalytic recombiners), flooded lead acid is pretty darn boring. Not the most efficient (though if you run it from 30% to 80% SoC like lithium, it's quite efficient, and the newer lead-carbon combinations resist hard sulfation pretty well), but it lacks the exciting failure modes of lithium.
Especially if you have flooded lead acid, the battery just doesn't have the energy to boil all the water out. The only real risk is hydrogen buildup, and that's easy enough to mitigate by giving it "Up and to the outside" path - it goes up really, really well and a bit of fresh air plus a path up mitigates just about all hydrogen buildup issues.
There's no particularly good reason to use a high energy density lithium cell for grid storage unless that's just what you have laying around, which was obviously the case for Tesla.
And, apparently, their cooling system can't handle a runaway as well as they thought.
But I agree, if they have a factory making a certain kind of cell, then it makes sense for them to prefer to sell products that contain those cells.
I don't know if there are any LFP-based Powerwall-equivalent products, but I assume they must exist at this point and are probably being deployed in utility power storage projects. I just don't see why you wouldn't use LFP unless you either can't get them for a reasonable cost, or these things are being deployed in unheated facilities that experience below-freezing temperatures (LFP generally can't be charged in sub-freezing temperatures).
Enphase home backup batteries are LFP. I have them and they are totally passively cooled.
https://electrek.co/2016/12/19/tesla-fire-powerpack-test-saf...
- https://www.youtube.com/watch?v=wOxIoFNfEsk
or even this one from May 2021 Harvard university
Just look at the price per kWh storage and the energy density compared to other technologies.
Why are journalists so bad at energy / power units?
It should have been "300 MW, 450 MWh" or "300 MW / 450 MWh" or something like that.
That's certainly a bold statement. Conventional Li-Ion chemistries are quite toxic.
Concentration makes the poison and the threshold for noticing smoke is very low. Assuming significant distance from a one off event this could be noticeable but effectively harmless right now.
Edit: a second pack is on fire, so we're approaching half a metric ton of HF gas now
Anyway, hydrogen fluoride is nasty but well studied. The 5 minute LC 50 for rats was 5120mg/m3 and at 6 hours of exposure 156mg/m3 is lethal for rats. It demonstrates a rapid fall off in toxicity rather than direct bioaccumulation because the damage is from acidification of water in the lungs. https://inis.iaea.org/collection/NCLCollectionStore/_Public/...
Humans exposed to 23mg/m3 notice lung irritation, but short term exposure is considered low risk. By comparison even a short distance from a 2 day fire in 5km/h winds your quickly talking sub 0.1mg/m3. It’s still toxic just not acutely dangerous from lung acidification.
But this is not an enclosed space - it’s a fenced-off high voltage switchyard in a paddock more than a kilometre from the nearest dwelling, and this battery hasn’t instantaneously emitted all its contents all at once. It’s also quite a windy and rainy week, which affects how serious a practical hazard this is. The emergency services have notified [1] people within 10km to keep the windows closed nevertheless.
Many more of good people of Geelong have a gigantic oil refinery on their doorstep[2], which is a far greater concern if you want to get exercised about HF-related accidents[3].
[0] https://www.gnr8nrg.com.au/images/resources/batteries/tesla/... [1] https://www.emergency.vic.gov.au/respond/#!/warning/17269/mo... [2] https://www.google.com/maps/place/Shell+Refinery+Corio,+Cori... [3] https://www.csb.gov/philadelphia-energy-solutions-pes-refine...
- There’s the ticking time bomb of natural gas going into out homes
- The ticking time bomb of AC electric going through our homes that Edison demonstrated could kill an elephant
- The ticking time bomb of wood framed stucco houses that could easily catch fire
- The ticking time bomb of volatile gasoline in your car catching fire
- the ticking time bomb of the Li-Ion battery in your back pocket
If you want to live in a technological society, you have to accept and manage these risks from our technology.
What exactly are we supposed to do with a large li-on battery burning in the garage? Give up and call insurance?
How often does that happen? I would say not very, even though gasoline is highly volatile. The onus is on designers and manufacturers to make Li-Ion fires so rare that consumers effectively ignore the risk.
A Lithium Ion battery pack will experience cascade failure in it's lifetime. A tank full of gasoline will not, neither will the circuit panel in your home.
Will that battery pack catch fire when it inevitably fails? Who knows, but that's exactly the problem.
There are significantly fewer home-scale or business-scale battery installations. The fact that there have already been so many issues with them is concerning, since they're much harder to put out than other fires.
Yes, there will be new safety procedures developed to account for these new risks. But they aren't in place yet and they won't be if Tesla fans ignore reality and pretend like nothing's wrong.
You are comparing an industrial site fire to residential fires. They are not comparable. Best wait for the incident investigation before declaring batteries dangerous and demanding they be banned.
I did not suggest that lithium batteries be banned (that was all you), I suggested that additional safety mechanisms would be needed to control the risk of spontaneous, uncontrollable combustion, which especially seems to be a risk with Tesla battery installations, seeing as how it has happened at every one of Tesla's Australian battery installations to date.
It would be good to know with what probability a powerwall will burn your house down, and what the probability is of anything else burning the house down.
If hysterical reactions like that were prevalent, we'd still be on foot. Every power technology has issues, and with consistent intelligent development, they are mitigated, or something better is developed. You think burning fossil fuels or containing hydrogen at 3000bar are better ideas?
It's not clear from the article what exactly went wrong, but it looks like they probably lost at least one shipping-container-sized battery pack.
Should you have a Powerwall in your house? Maybe, maybe not. I would feel safer with a design based on less volatile cells, like LFP. No reason to use technology that's unnecessarily dangerous when there are reasonable alternatives.
Just give proportional air time to incidents based on fires per vehicle.
This one BEV got half an hour of air time during the week? Why aren’t there a hundred hours of fuel burning vehicles catching fire?
This one BEV came off the road at high speed, hit a tree and all the occupants died? Why aren’t there an equal number of minutes for the non-BEV fatal single vehicle accidents?