EV Car Explodes in a Garage

red72vw · 2019-07-29T17:56:30.000Z

nobody:

teacher:

red72vw:

xevious:

Who knows if this guy’s garage was properly ventilated…

It is now.

. Priceless!! . :+1:

Probably too soon.

Yeah, I suppose so.

mea culpa

teacher · 2019-07-29T18:21:10.000Z

@ kuoh

I live in the USA in an older construction home & my attached garage is well ventilated at the gable on each end.

But you are correct, in new & newer construction most garages are sealed tight as a drum.

But… I never plan on owning an electric vehicle anyway, so I’m good either way.

SIGShooter · 2019-07-29T18:37:21.000Z

teacher:

@ kuoh

I live in the USA in an older construction home & my attached garage is well ventilated at the gable on each end.

But you are correct, in new & newer construction most garages are sealed tight as a drum. :+1:

But… I never plan on owning an electric vehicle anyway, so I’m good either way.

My garage in San Francisco is vented as are many of the other ones I’ve seen. Of course they are all attached to the house typically being on the ground floor so that might be a factor in it.

kuoh · 2019-07-29T19:10:14.000Z

For attached garages, I think that’s for energy savings as well as minimizing CO fatalities from accidentally leaving a car running or remote starting. Even in the Midwest typical 2 story home with adjacent living areas and bedrooms directly over the garage, it’s often just a sealed box with no vents. They do however get some thermal benefits from sharing interior walls and solar shielding by the house. Older detached garages out in the open sun however can get really sweltering compared to most attached garages.

KuoH

teacher:

…in new & newer construction most garages are sealed tight as a drum.

iamlucky13 · 2019-07-29T19:18:33.000Z

xevious:

It could have been something to do with temperature, as there was apparently higher than average temps in Montreal that day. Batteries do not do well with extreme heat. Who knows if this guy’s garage was properly ventilated…

I’m not aware of any BEV manufacturer using cells significantly different than those we use in flashlights. While in really hot conditions, a car might get up above 60 Celsius, the batteries are often abuse tested at over 100 Celsius (Samsung 30Q, for example, fails at around 140 Celsius).

cabfrank · 2019-07-29T19:33:52.000Z

Makes sense to me. I doubt this was heat related. It could very well become the media narrative that it was, though.

Nev · 2019-07-29T19:40:31.000Z

Did the owner switch off & leave it for 15 minutes?

Sorry, probly to soon.

teacher · 2019-07-29T19:50:06.000Z

cabfrank:

Makes sense to me. I doubt this was heat related. It could very well become the media narrative that it was, though.

…. Heavens… are you saying the MSM might ‘misrepresent’ something & put their own spin on it?? . :person_facepalming:

Who woulda thunk it……
.

.
Seriously… your exactly right cabfrank.

xevious · 2019-07-29T19:52:41.000Z

red72vw:

xevious:

Who knows if this guy’s garage was properly ventilated…

It is now.

Indeed.

DavidEF · 2019-07-29T20:02:06.000Z

After reading through that article, and a lot of the comments, and glancing at headlines of other articles on that site, I can confirm that there are, in fact, stupid people in this world.

teacher · 2019-07-29T20:05:15.000Z

Yep… it is definitely over now…. except the ‘splanin’ why someone has to try to do. Probably Fire Marshall, Insurance, & Car manufacturer. In that order….

teacher · 2019-07-29T20:23:12.000Z

.
Four things I can deduct from this picture linked to in the OP…

1. Nice Rollback
2. That car could be bought real cheap
3. The garage needs no further ventilation
4. Thankfully it appears the rest of the home was mostly undamaged. Kudos to the fast working firemen……

Couchmaster · 2019-07-29T21:03:37.000Z

Man, that’s crazy and frightening at the same time. Not plugged in, just sitting, starts to smoke,….BOOM!

CalvinIS · 2019-07-29T21:08:14.000Z

That's very interesting, I would have figured the li-ion battery would vent rather than straight up explode. Then again a fast enough vent would just be an explosion.

hank · 2019-07-30T00:00:25.000Z

Not plugged in, just sitting, starts to smoke,….BOOM!

Crystals!

https://www.google.com/search?client=firefox-b-1-d&q=lithium-ion+battery+fire+crystals

They got pictures: Li-ion batteries blow up because they breed nanowire crystals • The Register

For the first time a group of scientists has captured close-up images of mysterious finger-like growths known as dendrites that can lead to short circuits and fires in the lithium-ion batteries that power hordes of smartphones, laptops and other gadgetries.

By using cryo-electron microscopy (cryo-EM), researchers from Stanford University and the US National Accelerator Laboratory have revealed that the lithium metal dendrites are long six-sided crystals. Their study was published in Science on Thursday.

The growths can spark battery fires by causing a short circuit if they pierce through the separator, a membrane placed in between the cathode and anode. The resulting surge of current can lead to thermal runaway, whereby the increased heat coupled with flammable electrolyte fluid spark fires….
…
… The long crystals can range from about 100 nanometers to two micrometers in diameter, depending on the charging current.

The researchers examined thousands of lithium metal dendrites forming in different electrolytes and also the solid electrolyte interphase, a coating that forms on the metal electrodes.

Cryo-EM, a technique that won this year’s Nobel Prize for Chemistry, was vital to studying the dendrites in more detail. Traditional transmission electron (TEM) microscopy techniques which involve aiming a beam of electrons through a sample destroyed the dendrites….

27 Oct 2017
…

Th558 · 2019-07-30T01:04:52.000Z

Wait…what the fk happened to the roof……

teacher · 2019-07-30T01:34:03.000Z

Th558:

Wait…what the fk happened to the roof……

I imagine it burned.

Sparks65 · 2019-07-30T01:55:24.000Z

^ That’d be my guess

Nev · 2019-07-30T02:59:14.000Z

Mine too.

Dougiestyle · 2019-07-30T03:34:39.000Z

I tell people all the time that batteries are stored energy just like a can of gasoline. If mistreated, abused or neglected… boom happens. In Li-ion batts it is very dense energy. For an explosive venting occurrence, Willy Lumplump at the EV car factory is looking for a new job, I’d imagine, unless he’s already suffered his own li-ion fate.