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| Meta Title | Tesla Battery Fire: Musk Responds & an Expert Explains - EE Times |
| Meta Description | As you may have already seen, a Tesla Model S engulfed in flames was captured on film last week. If you haven't seen it yet, take a moment to watch the |
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| Boilerpipe Text | As you may have already seen, a
Tesla Model S engulfed in flames was captured on film last week
. If you havenât seen it yet, take a moment to watch the video below. Warning, it does contain profanity.
The vision of a car ablaze is startling. As the number of hits on the burning Tesla video climbed over two millions, people inevitably began to raise safety concerns. Elon Musk, the founder of Tesla Motors, responded on the companyâs blog with some facts about the damage sustained in the accident, the construction of the vehicleâs battery, and the resulting fire.
Musk explained that damage to the armor plating on the bottom of the vehicle was inflicted by contact with debris of a specific shape that resulted in a lever action, puncturing the bottom of the Model S. He noted that 25 tons of force would be required to make the three-inch-deep puncture in the quarter-inch-thick armor plating.
By DEEPXÂ 03.27.2026
By Moon Content Creator PCBCart 03.26.2026
By Telink  03.20.2026
Don Sadoway, a professor of materials chemistry at MIT and a leading advanced battery technology and energy storage expert, says that this event is incredibly rare. âLarge format batteries are not intrinsically problematic and can be made to stand up to abuse, and I view this situation as an outlier event. The chances of running over something that actually punctures the underbelly of a car are small.â
Upon detecting the puncture, the carâs control system warned the driver to pull over and exit the vehicle, which he did without injury. At that point, fire broke out in one of the carâs 16 battery modules. Musk pointed out, âAt no point did fire enter the passenger compartment.â This statement was true even after fire department personnel punctured the firewall in order to allow the fire to spread upwards, as seen in the video.
To further relieve fears of battery fires, Musk went on to compare the combustion potential of the Model S battery system to a typical internal combustion engine. âIn contrast, the combustion energy of our battery pack is only about 10 percent of that contained in a gasoline tank and is divided into 16 modules with firewalls in between,â he noted on the blog. âAs a consequence, the effective combustion potential is only about 1 percent that of the fuel in a comparable gasoline-powered sedan.â
Citing the National Fire Protection Associationâs statistics, Musk explained that combustion engines currently experience fires at a rate of one fire per 20 million miles driven. In contrast, Tesla has shown one fire per 100 million miles driven.
Sadoway agrees with that assessment, and says that this incident should not be a deterrent to adoption rates. âUnfortunately, we do see cars catch fire. There are accidents regularly where you see highly volatile fluids pouring out onto the road and catching fire. That doesnât stop people from buying them though. If you open the newspaper and see that there was a collision and that one car caught fire, you might say, âWow, that is too bad,â then go out and hop into your car and drive. If it is new technology that it happens to, people pay more attention.
âFrom my perspective, the bigger problem with lithium batteries is the cost. You donât see them widespread because the cars that are purely electric right now are far too costly to appeal to the general public. They wonât have that attraction until we get one on the showroom floor for a total less than 20 thousand dollars.
 Thereâs more information, including the full correspondence with the owner of the vehicle
available at the Tesla Motors blog
.
Caleb Kraft
Caleb Kraft is chief community editor on EE Times, where he covers EE Life and the open source for EE Times' Designlines. Caleb has been visiting garages and basements around the globe either literally or via Internet to explore what engineers are doing in in their free time. An enthusiastic tinkerer, Caleb has a tendency to play with high voltage and or dangerous temperatures when given the time. |
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# Tesla Battery Fire: Musk Responds & an Expert Explains
By [Caleb Kraft](https://www.eetimes.com/author/caleb-kraft/ "Posts by Caleb Kraft") 10\.07.2013 0
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As you may have already seen, a [Tesla Model S engulfed in flames was captured on film last week](https://eetimes.com/document.asp?doc_id=1319714&). If you havenât seen it yet, take a moment to watch the video below. Warning, it does contain profanity.
The vision of a car ablaze is startling. As the number of hits on the burning Tesla video climbed over two millions, people inevitably began to raise safety concerns. Elon Musk, the founder of Tesla Motors, responded on the companyâs blog with some facts about the damage sustained in the accident, the construction of the vehicleâs battery, and the resulting fire.
Musk explained that damage to the armor plating on the bottom of the vehicle was inflicted by contact with debris of a specific shape that resulted in a lever action, puncturing the bottom of the Model S. He noted that 25 tons of force would be required to make the three-inch-deep puncture in the quarter-inch-thick armor plating.
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Don Sadoway, a professor of materials chemistry at MIT and a leading advanced battery technology and energy storage expert, says that this event is incredibly rare. âLarge format batteries are not intrinsically problematic and can be made to stand up to abuse, and I view this situation as an outlier event. The chances of running over something that actually punctures the underbelly of a car are small.â
Upon detecting the puncture, the carâs control system warned the driver to pull over and exit the vehicle, which he did without injury. At that point, fire broke out in one of the carâs 16 battery modules. Musk pointed out, âAt no point did fire enter the passenger compartment.â This statement was true even after fire department personnel punctured the firewall in order to allow the fire to spread upwards, as seen in the video.
To further relieve fears of battery fires, Musk went on to compare the combustion potential of the Model S battery system to a typical internal combustion engine. âIn contrast, the combustion energy of our battery pack is only about 10 percent of that contained in a gasoline tank and is divided into 16 modules with firewalls in between,â he noted on the blog. âAs a consequence, the effective combustion potential is only about 1 percent that of the fuel in a comparable gasoline-powered sedan.â
Citing the National Fire Protection Associationâs statistics, Musk explained that combustion engines currently experience fires at a rate of one fire per 20 million miles driven. In contrast, Tesla has shown one fire per 100 million miles driven.
Sadoway agrees with that assessment, and says that this incident should not be a deterrent to adoption rates. âUnfortunately, we do see cars catch fire. There are accidents regularly where you see highly volatile fluids pouring out onto the road and catching fire. That doesnât stop people from buying them though. If you open the newspaper and see that there was a collision and that one car caught fire, you might say, âWow, that is too bad,â then go out and hop into your car and drive. If it is new technology that it happens to, people pay more attention.
âFrom my perspective, the bigger problem with lithium batteries is the cost. You donât see them widespread because the cars that are purely electric right now are far too costly to appeal to the general public. They wonât have that attraction until we get one on the showroom floor for a total less than 20 thousand dollars.
Thereâs more information, including the full correspondence with the owner of the vehicle [available at the Tesla Motors blog](http://www.teslamotors.com/blog/model-s-fire).
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[Caleb Kraft](https://www.eetimes.com/author/caleb-kraft/ "Posts by Caleb Kraft")
*Caleb Kraft is chief community editor on EE Times, where he covers EE Life and the open source for EE Times' Designlines. Caleb has been visiting garages and basements around the globe either literally or via Internet to explore what engineers are doing in in their free time. An enthusiastic tinkerer, Caleb has a tendency to play with high voltage and or dangerous temperatures when given the time.*
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krisi 2013-10-07 14:12:46
"The chances of running over something that actually punctures the underbelly of a car are small." ???
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Caleb Kraft 2013-10-07 14:17:23
While I'm sure he was speculating, do you suspect that the undercarriages of cars are punctured frequently?
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krisi 2013-10-07 14:30:56
I am en engineer...I like the data...I don't like "small"..."small" compared to what?
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Caleb Kraft 2013-10-07 14:43:54
Yes, ofcourse. I wonder where someone would even look to find that kind of data. Surely the auto industry has a recommended thickness or impact resistance for the bottoms of vehicles based off of some kind of data.
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Sheetal.Pandey 2013-10-07 15:29:47
Great to know that control system informed the driver to move out. That's proactive. That also proves safety is first.
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Max The Magnificent 2013-10-07 15:50:29
@krisi: *I don't like "small"..."small" compared to what?*
Compared to somethoing that was bigger LOL
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krisi 2013-10-07 15:52:46
LOL Max
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PocketBrain 2013-10-07 16:07:45
I wonder what is the barrier against using a safer battery type. Cost? Energy density? Search the youtubes for nail-puncture videos of standard Lithium Ion cells and A123 Systems' batteries and you'll have a good comparison..
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polylith 2013-10-07 16:18:07
If you take the statements are face value, that Tesla battery fires are 5 times less likely and have 1% the combustion energy of gasoline fires, isn't the car's battery safe enough as is?
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Bert22306 2013-10-07 16:47:01
Hasn't anyone ever seen a vehicle fire?
Lithium batteries sure are getting a bad rap, of late. PCs, airplanes, cars, anything more? I'd like to know what kind of debris this Tesla ran over, specifically, and then compare what it might have done to a gasoline tank. Too much vague generality tends to make me skeptical.
Anyway, to continue my mantra, battery powered EVs seem unimaginative and apologetic, at best. It's time to get better EVs out there.
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GMF 2013-10-07 16:56:08
Musk claimed "...Had a conventional gasoline car encountered the same object on the highway, the result could have been far worse."
Should not be too hard for Musk to find out how many car fires caused by bottom impaction.
The fact is a conventional gasoline car has much less chance to catch fire in the same situation as Tesla, although the fire could be much worse in case it did start. First, a gas tank in a car is far away from ground, comparing to Tesla's bottom mounted battery pack. Secondary, the bottom area of gas tank is much smaller than Tesla's battery pack.
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Caleb Kraft 2013-10-07 16:58:29
Many cars now(late 90s onward) mount the gas along the bottom of the car (my minivan is a good example).
I think he was speculating about the fact that the tesla has additional armor and batteries to protect the passengers. That debris could have theoretically entered the cabin of a normal car.
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Frank Eory 2013-10-07 18:32:53
The undercarriage has armor plating, there are firewalls between battery modules and between the undercarriage and the passenger compartment, and still a foreign object impaled one or more of the batteries, causing a fire. Even without hard data to compare to gasoline combustion engine vehicle fires, that certainly sounds like an outlier incident to me. It is also important to note that the driver was warned to exit the vehicle and escaped uninjured. You don't get that advance warning with a punctured gasoline tank.
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GMF 2013-10-07 19:24:06
Re: Musk's claim is baseless
[Caleb,](https://www.eetimes.com/tesla-battery-fire-musk-responds-an-expert-explains/profile.asp?piddl_userid=54559) You're right. I did some search about fuel tank safety regulations. Only thing I found is FMCSA393.67 which didn't prohbit bottom mount, not even for gastank mounted after real axle. Only impact related test is 30 feet drop test. Maybe the time to adding bottom impact test for gasoline cars and EV/HEV.
http://www.fmcsa.dot.gov/rules-regulations/administration/fmcsr/fmcsrruletext.aspx?reg=393.67
http://www.autosafetyexpert.com/defect\_fueltank.php?pagetitle=FUEL%20TANK%20-%20FIRE
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daleste 2013-10-07 23:18:23
It is an impressive fire, but I have seen gasoline cars burn like that too. The numbers do indicate fires happening more often in gasoline vehicles, but I don't think they have enough data yet to prove that batteries are safer for fire danger.
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rick merritt 2013-10-08 00:44:01
@Caleb: Great reporting\!
I assume the video of the burning Tesla was AFTER the fire department puctured the firewall. Is that right?
Agreed that the realtive saftey of the Tesla is very high and should not spawn a frenzy of EV fears. That said, this is a marketing nightmare and could undermine the company and set back the EV market.
A viral video of a flaming car is so much more powerful than 300 words explaining the technical reality of what happened and the relative saftey of EVs and gasoline engine cars.
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Caleb Kraft 2013-10-08 17:19:30
Yes, this video is after the fire department punctured the firewalls allowing the fire to vent upwards.
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Caleb Kraft 2013-10-08 17:20:14
I've seen plenty of vehicle fires. Heck, youtube is full of them. I think this is wildly blown out of proportion myself.
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Caleb Kraft 2013-10-08 17:21:00
I know, the warning system is pretty incredible. I wish I would have had that for a few mechanical failures I've seen\!
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DrQuine 2013-10-08 21:39:05
When a video goes viral, a sample size of one takes on an extraordinary weight in the public eye. Scientific explanations (regardless of how accurate) have a tough time competing with an iconic image that is seared into the mind. That said, it was very interesting to read the "rest of the story".
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rick merritt 2013-10-09 02:16:16
@DrQuione: Agreed\!
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boblespam 2013-10-09 08:45:52
I love when engineers come to conclusion from statistics based one one event \!
OKays probably Musk isn't an engineer, but some others here have no excuse ;-)
"Musk explained that combustion engines currently experience fires at a rate of one fire per 20 million miles driven. In contrast, Tesla has shown one fire per 100 million miles driven"
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p\_g 2013-10-09 13:17:22
But gasoline catching fire is far more propable than battery catching fire. There is not much inflamable material in the Tesla (compared to gasoline).
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JCreasey 2013-10-09 14:49:55
The number of fires per mile is not the statistic I think you need to consider. The number of petrol tank penetrations to battery penetrations is what you want to compare.
I'll bet there are many more petrol tank penetrations where gasoline is spilled and there is no fire. Unfortunately where a battery is concerned, most penetrations (where the physical cell is compromised) are likely to self ignite. That is why they had to put the extreme reinforcing on the base and between cells as firewalls.
For EV batteries you need to consider
1\. There is a self ignition capability (chemistry or physical pack faults)
2\. There is an immediate fire capability if the chemistry/construction is compromised
Tesla, if successful will produce millions of batteries to build into their EV packs, and just like laptop batteries they will have a failure rate above zero. Unfortunately, any failure may result in very large uncontrolled energy discharges almost guaranteed to have an associated fire (or as in the Boeing experience, heat destruction and smoke).
While gasoline tanks are an obvious potential fire hazard, it is not a given that every fault will result in fire. IMHO Hydrogen (metal hydride) storage is probably safer than either gasoline or any of the battery chemistries.
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NewStandard 2013-10-10 10:23:29
The last two paragraphs of this post are missing a quotation mark. It's not clear whether the author or Dr. Sadoway offered the opinion that EVs need to cost under \$20k. Whoever did, that's an oddly high bar to meet when you consider the drastically reduced operational costs of EVs--fuel less than half the cost of that for a Prius and almost no maintenance required at all. Moreover EVs are smoother and quieter than any ICE on the road at any price, at least as self-generated (immunity to outside noises and suspension being independent of drivetrain). The market has already placed a high cost premium on those qualities. People just need to learn that and need to feel comfortable with adapting to something different. Human nature is against doing that.
In my opinion the technology obstacle is that battery development needs to be improved to allow an honest 200 miles of range with very little degradation over 200k miles or so. It may take a solid state battery or something else more stable. If the masses cannot feel comfortable paying the price of having to recharge overnight after "only" 200 miles in order to rid themselves of the drawbacks of fossil fuels, then our addiction to oil may indeed be fatal to humanity.
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Sanjib.A 2013-10-21 23:39:05
How did the warning system work in Tesla? Did it detect the mechanical failure of the armor and infringement into the battery? Or did it detect a "battery over-heating" scenario after the punch was made and detect a possible fire (which I am guessing)? If the warning system is designed to detect infringement of the battery armor, this is incredible.
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[EdgeCortix Looks To Chiplets For Third-Gen Reconfigurable AI Chip](https://www.eetimes.com/podcasts/edgecortix-looks-to-chiplets-for-third-gen-reconfigurable-ai-chip/)
By [Sally Ward-Foxton](https://www.eetimes.com/author/sally-ward-foxton/ "Posts by Sally Ward-Foxton") 03\.27.2026
EdgeCortixâs third-gen reconfigurable AI chip targets blazing efficiency with new chiplet architecture.
[Listen](https://www.eetimes.com/podcasts/edgecortix-looks-to-chiplets-for-third-gen-reconfigurable-ai-chip/)
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| Readable Markdown | As you may have already seen, a [Tesla Model S engulfed in flames was captured on film last week](https://eetimes.com/document.asp?doc_id=1319714&). If you havenât seen it yet, take a moment to watch the video below. Warning, it does contain profanity.
The vision of a car ablaze is startling. As the number of hits on the burning Tesla video climbed over two millions, people inevitably began to raise safety concerns. Elon Musk, the founder of Tesla Motors, responded on the companyâs blog with some facts about the damage sustained in the accident, the construction of the vehicleâs battery, and the resulting fire.
Musk explained that damage to the armor plating on the bottom of the vehicle was inflicted by contact with debris of a specific shape that resulted in a lever action, puncturing the bottom of the Model S. He noted that 25 tons of force would be required to make the three-inch-deep puncture in the quarter-inch-thick armor plating.
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By DEEPX 03.27.2026
[](https://www.eetimes.com/pcbcart-advanced-dfm-surpassing-standard-hmlv-ems-provider/ "PCBCart: Advanced DFM Surpassing Standard HMLV EMS Provider ")
By Moon Content Creator PCBCart 03.26.2026
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By Telink 03.20.2026
Don Sadoway, a professor of materials chemistry at MIT and a leading advanced battery technology and energy storage expert, says that this event is incredibly rare. âLarge format batteries are not intrinsically problematic and can be made to stand up to abuse, and I view this situation as an outlier event. The chances of running over something that actually punctures the underbelly of a car are small.â
Upon detecting the puncture, the carâs control system warned the driver to pull over and exit the vehicle, which he did without injury. At that point, fire broke out in one of the carâs 16 battery modules. Musk pointed out, âAt no point did fire enter the passenger compartment.â This statement was true even after fire department personnel punctured the firewall in order to allow the fire to spread upwards, as seen in the video.
To further relieve fears of battery fires, Musk went on to compare the combustion potential of the Model S battery system to a typical internal combustion engine. âIn contrast, the combustion energy of our battery pack is only about 10 percent of that contained in a gasoline tank and is divided into 16 modules with firewalls in between,â he noted on the blog. âAs a consequence, the effective combustion potential is only about 1 percent that of the fuel in a comparable gasoline-powered sedan.â
Citing the National Fire Protection Associationâs statistics, Musk explained that combustion engines currently experience fires at a rate of one fire per 20 million miles driven. In contrast, Tesla has shown one fire per 100 million miles driven.
Sadoway agrees with that assessment, and says that this incident should not be a deterrent to adoption rates. âUnfortunately, we do see cars catch fire. There are accidents regularly where you see highly volatile fluids pouring out onto the road and catching fire. That doesnât stop people from buying them though. If you open the newspaper and see that there was a collision and that one car caught fire, you might say, âWow, that is too bad,â then go out and hop into your car and drive. If it is new technology that it happens to, people pay more attention.
âFrom my perspective, the bigger problem with lithium batteries is the cost. You donât see them widespread because the cars that are purely electric right now are far too costly to appeal to the general public. They wonât have that attraction until we get one on the showroom floor for a total less than 20 thousand dollars.
Thereâs more information, including the full correspondence with the owner of the vehicle [available at the Tesla Motors blog](http://www.teslamotors.com/blog/model-s-fire).

[Caleb Kraft](https://www.eetimes.com/author/caleb-kraft/ "Posts by Caleb Kraft")
*Caleb Kraft is chief community editor on EE Times, where he covers EE Life and the open source for EE Times' Designlines. Caleb has been visiting garages and basements around the globe either literally or via Internet to explore what engineers are doing in in their free time. An enthusiastic tinkerer, Caleb has a tendency to play with high voltage and or dangerous temperatures when given the time.* |
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| Unparsed URL | com,eetimes!www,/tesla-battery-fire-musk-responds-an-expert-explains/ s443 |