Tesla Assists in Removing Partially Destroyed Battery Pack after Fatal Crash

Megalith

24-bit/48kHz
Staff member
Joined
Aug 20, 2006
Messages
13,003
A man in California died Friday when he ran his Tesla X into a median barrier and the car caught on fire before being hit by two more cars. Being that a lithium battery was involved, which first responders may not be accustomed to dealing with, Tesla decided to send engineers to assist in its removal.

Tesla recommends using “large amounts of water” to extinguish a battery fire in its vehicles and to use a thermal imaging camera to monitor the battery for at least one hour after it is found to be completely cooled. Tesla also has firewalls inside the battery pack that can slow down the fire from spreading between the modules.
 

EODetroit

[H]ard|Gawd
Joined
Oct 20, 2004
Messages
1,485
The "large amounts of water" is merely to prevent the remainder of the car and the surroundings from catching fire, and to provide a bit of cooling to prevent more thermal runaways. It can't put out a Li-Ion fire, as it contains its own oxidizer. The emphasis on "large amount" and not a "small amount" is to make sure more good than harm is done, a small amount will tend to cause shorts and cause more thermal runaways, if you only have a small amount of water, do nothing instead.
 

seanreisk

[H]ard|Gawd
Joined
Aug 29, 2011
Messages
1,711
ELEGTRIC CARZ R BAD U HATE JESUS

PHALSE! I LUBBZ0R JESUS! 2 MINUTZ, 14 SECUNDZ!

Equally funny are the people who don't believe that an electric car *can* catch on fire. There is a LOT of energy stored in those things. I remember how much sweat pooled in my underwear when I accidentally blew up a 2 cf capacitor.
 
Last edited:

SticKx911

2[H]4U
Joined
Mar 14, 2004
Messages
2,509
PHALSE! I LUBBZ0R JESUS! 2 MINUTZ, 14 SECUNDZ!

Equally funny are the people who don't believe that an electric car *can* catch on fire. There is a LOT of energy stored in those things. I remember how much sweat pooled in my underwear when I accidentally blew up a 2 cf capacitor.
Sweat...sure. :)
 

WhoMe

Gawd
Joined
Jan 3, 2018
Messages
827
PHALSE! I LUBBZ0R JESUS! 2 MINUTZ, 14 SECUNDZ!

Equally funny are the people who don't believe that an electric car *can* catch on fire. There is a LOT of energy stored in those things. I remember how much sweat pooled in my underwear when I accidentally blew up a 2 cf capacitor.
You probably needed a dose of lithium afterwards.
 

ol1bit

[H]ard|Gawd
Joined
Jan 15, 2007
Messages
1,232
And that's why I have a 4 inch lifed Jeep JK, and double armor around the fuel tank. Well, not really the reason, but would be much better in this situation. :)
 

Wolfkin

[H]ard|Gawd
Joined
Feb 2, 2005
Messages
1,086
And when they say large amounts of water my guess would be in the excess of 1.000 gallons.
 

cageymaru

Fully [H]
Joined
Apr 10, 2003
Messages
20,785
If anyone was curious what the battery pack looked like....





Empty battery pack so you'll can see how it is constructed.

 
Last edited:

Nanogrip

Limp Gawd
Joined
Dec 4, 2016
Messages
449
Hmmm, so what will stop an oxidize fire? Not even vacuum of space I think.
 

MV75

[H]ard|Gawd
Joined
Nov 13, 2007
Messages
1,025
And when they say large amounts of water my guess would be in the excess of 1.000 gallons.

Well you know when you put say, a 2s lipo pack into a bucket of water? It would be like needing enough to put the whole car into a swimming pool.
 

Dead Parrot

2[H]4U
Joined
Mar 4, 2013
Messages
2,831
Hmmm, so what will stop an oxidize fire? Not even vacuum of space I think.

Think of each cell as its own Estes rocket motor. Once it lights, it runs until the fuel is exhausted. And yes, Estes motors run just fine underwater if you light them while they are dry. The water is to keep the burning cell from lighting its neighbors.
 

krotch

Supreme [H]ardness
Joined
Aug 12, 2004
Messages
4,509
Yeah because massive explosions are better than self breathing fires. And that huge amounts of energy aren't used in hydro cars, either. /s

Not hydrogen, but CNG. Which I don't think CNG is even compressed as high. Although, the picture showing the other car, the tanks seem pretty sketchy. I know Toyota's hydrogen tank can withstand bullet fire and required them to use armor piercing bullets shot in the same location for it to puncture. Although a massive car accident would be enough to puncture.

Personally, I wouldn't want to roll around in flammable gas compressed to 10,000 psi behind me.

https://www.thesun.co.uk/news/32955...th-fuel-killing-one-woman-and-injuring-three/
 

seanreisk

[H]ard|Gawd
Joined
Aug 29, 2011
Messages
1,711
Brazil is really big on alternate fuels, especially ethanol, I think they are the world's largest user of fuel created from plant alcohols. But that wasn't an ethanol explosion, that looks like ... a bomb. I'm not sure how natural gas gets that much of a reaction, it isn't a bleve, and I don't see a lot of flames, either, but the explosion starts inside/under the car.
 
Last edited:

Kelter

Limp Gawd
Joined
Dec 23, 2005
Messages
342
I saw the wreckage on the way into work last Friday. The area that the car crashed is kind of an awkward offramp for carpool lanes. The area has 2 carpool lanes, and the left most eventually turns off into the 85, while the inner carpool lane stays south on the 101. A LOT of people drive in the left most lane, and last minute realize they need to stay on 101, so they cut back into the 101. I am guessing that is what this guy did, but a little too late as he hit the center split and seemingly crushed the pillar/metal railing all the way to the cement wall.
As for how the other 2 drivers hit him, this is the bay area man. We got the absolute worst drivers all clustered together. Then to top it off, we have the highest density of electrics who all drive like they are playing a game to conserve electricity and they are all always cutting across to the 'fast'/carpool lanes and driving extra slow, and when they need to exit, they have to cut across the freeway again causing everyone to break behind.
Ok.. to be fair, not all electric drivers are horrendous.. only about 95%.
 
Joined
Jan 24, 2018
Messages
1,005
-- stop watch running, waiting for first, "ELEGTRIC CARZ R BAD U HATE JESUS" post.
"JEEEEZUS would not WAAWNT yew to drive the GAY-marriage-GUN-control-COMMIE-faggit ELECTRIC CARS! JEEEEZUS wants YEW to drive the JEEEEZUS MEGA SEMI SUV 9000, and BURN them dead dineysawers to HEAVEAN!"
 
Joined
Jan 24, 2018
Messages
1,005
PHALSE! I LUBBZ0R JESUS! 2 MINUTZ, 14 SECUNDZ!

Equally funny are the people who don't believe that an electric car *can* catch on fire. There is a LOT of energy stored in those things. I remember how much sweat pooled in my underwear when I accidentally blew up a 2 cf capacitor.
Consider how much energy is stored in the same volume of gasoline, and how we've managed to keep it under control.
 

Mordred

n00b
Joined
Oct 8, 2009
Messages
17
I know Toyota's hydrogen tank can withstand bullet fire and required them to use armor piercing bullets shot in the same location for it to puncture. Although a massive car accident would be enough to puncture.

THIS. Those Tanks are build like an airplane blackbox. The energy that's needed to break those will kill you several times over.
 

krotch

Supreme [H]ardness
Joined
Aug 12, 2004
Messages
4,509
Brazil is really big on alternate fuels, especially ethanol, I think they are the world's largest user of fuel created from plant alcohols. But that wasn't an ethanol explosion, that looks like ... a bomb. I'm not sure how natural gas gets that much of a reaction, it isn't a bleve, and I don't see a lot of flames, either, but the explosion starts inside/under the car.

Think that explosion was from them over pressurizing the tank during fill up. It eventually just gave up and exploded.
 
Top