"I used to work for Tesla…"
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@Rhywden said in "I used to work for Tesla…":
@Polygeekery said in "I used to work for Tesla…":
@Gribnit said in "I used to work for Tesla…":
@Polygeekery What, you don't know how to drain a battery? For a simple proof of concept, take the battery in your car. Then carefully grab hold of the black terminal with your right hand, then very carefully grab the red with your left hand.
You may need to recharge the battery afterwards.
Literally nothing would happen. Too much resistance and too little voltage.
But that person was suggesting you draw down a battery capable of putting out 100,000 watts of heat for an hour like it is nothing. You can't just simply draw them down. It is not a trivial task.
Why not? I'm not suggesting that you don't have to have specialized equipment but feeding the energy back into the grid is something every photovoltaic setup does easily.
And that's just one example. I'm pretty sure there are more ways to do this easily.Crashed cars tend to not be in the original shape, so making usable connections to drain the batteries might be very hard to do without percussive maintenance, and the batteries are presumably already quite unstable. Draining a crasched electric vehicle is not as easy as it might seem. Especially if it's to prevent the cells from combusting.
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Maybe enclose the EV in an oxygen-free environment, then get the energy out of it...
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Set it on fire, that'll get the energy out.
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@lolwhat said in "I used to work for Tesla…":
Maybe enclose the EV in an oxygen-free environment, then get the energy out of it...
That would help with the lithium oxidizing, but it would not do anything for the major concern. The cells themselves do not need oxygen to produce heat. They have all that energy stored already, that is why they are batteries. ;)
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@loopback0 said in "I used to work for Tesla…":
Set it on fire, that'll get the energy out.
Iam thinking that if the car is mangled enough that might be the only way to make it truly inert.
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@Gribnit said in "I used to work for Tesla…":
@Zerosquare said in "I used to work for Tesla…":
LiFePo4 for example
Polonium? Fucking Polonium? Is safe?
Did you know that sodium and chlorine are safe to eat?
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@pie_flavor said in "I used to work for Tesla…":
@Gribnit said in "I used to work for Tesla…":
@Zerosquare said in "I used to work for Tesla…":
LiFePo4 for example
Polonium? Fucking Polonium? Is safe?
Did you know that sodium and chlorine are safe to eat?
Did you that Polonium is radioactive?
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@Polygeekery Don't give him the answer, dingus.
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@Gribnit said in "I used to work for Tesla…":
Fucking Polonium? Is safe?
No but it explains your posts.
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@Benjamin-Hall said in "I used to work for Tesla…":
But not a significant fire/explosion risk.
Not usually, not if the lead-acid battery is vented correctly. Without that, there's a risk of hydrogen buildup which can make things More Fun, even if that's not usually the main problem in a vehicle fire.
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@Gribnit said in "I used to work for Tesla…":
Fucking Polonium? Is safe?
I've never heard of a safety study on that specific use of a synthetic radioactive nucleotide, but I'd guess this is a time when the precautionary principle should come into play. Wear appropriate rubber protective equipment.
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@topspin said in "I used to work for Tesla…":
@chozang said in "I used to work for Tesla…":
@topspin said in "I used to work for Tesla…":
@xaade said in "I used to work for Tesla…":
I pretty much considered him one of those hoax Solar Freakin Roadways types.
At some point I painfully realized that shit is surprisingly hard to argue with.
Where are you even going to start explaining what's wrong about the idea... The answer is clearly "EVERYTHING", but that's not very convincing for people who are so far away from reality that they think driving heavy trucks on glass and electronics is a good idea.Eh. Why not suggest to them putting the solar panels next to the road to avoid this problem. I bet some of them would concede that might be a possibility. For the ones that do, you've started them on the path of reasoning about it.
And avoiding basically all of the stupidity of the original idea?
I think the appeal is that you're already wasting so much nature area and don't want to put it next to the roads as that wouldn't save any space. Whatever.I'm not so sure it wouldn't save any. Most roads I've seen don't have the trees come right up to the road. There's often a flattish space just outside the guard rails.
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@Gribnit said in "I used to work for Tesla…":
@Zerosquare said in "I used to work for Tesla…":
LiFePo4 for example
Polonium? Fucking Polonium? Is safe?
Look, I'm not usually an advocate for abstinence-only sex education but in this case I'd make an exception.
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I used to work for Tesla
https://i.imgur.com/BeaVIYM.gif
But I'm much better now
https://i.imgur.com/pdsOl01.gif(would look better if this shit software didn't enlarge the GIFs 600%)
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@El_Heffe You can use the
widthproperty in theimgtag.
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@pie_flavor said in "I used to work for Tesla…":
@El_Heffe You can use the
widthproperty in theimgtag.If you actually use an image tag (or the markdown equivalent) then it doesn't embiggen the image like that. It's an iframely embed thing, iirc.
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For instance:
@El_Heffe said in "I used to work for Tesla…":
I used to work for Tesla
But I'm much better now
edit: for those who'd rather not have to view raw, the markdown for an image is the same as the markdown for a link, but there's a
!preceding it:
That's equivalent to the HTML:
<img alt="alt text" src="image url">
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@chozang said in "I used to work for Tesla…":
putting the solar panels next to the road to avoid this problem
But that just gets them covered in a thick layer of road gunge sprayed up by vehicle wheels.
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@Polygeekery said in "I used to work for Tesla…":
The cells themselves do not need oxygen to produce heat. They have all that energy stored already, that is why they are batteries. ;)
That’s why they’re (electrochemical) cells. They’re batteries because they consist of multiple of those cells connected together.
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@M_Adams said in "I used to work for Tesla…":
@boomzilla said in "I used to work for Tesla…":
The batteries there are much much smaller and that's very important.
But are still dangerous:
Imagine if you scaled that up to car-size.
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@LaoC said in "I used to work for Tesla…":
@Gribnit said in "I used to work for Tesla…":
It's a typo, it was meant to be LiFePO4
But what it said was polonium.
TBF this battery nomenclature is a bit confusing. "LiPo" is actually not supposed to be LiPO, but "Po" means "polymer" there.
In LiPO, yes. I believe he was talking about LiFePO4 batteries, which means "Lithium Iron Phosphate".
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@Polygeekery said in "I used to work for Tesla…":
@LaoC said in "I used to work for Tesla…":
@Gribnit said in "I used to work for Tesla…":
It's a typo, it was meant to be LiFePO4
But what it said was polonium.
TBF this battery nomenclature is a bit confusing. "LiPo" is actually not supposed to be LiPO, but "Po" means "polymer" there.
In LiPO, yes. I believe he was talking about LiFePO4 batteries, which means "Lithium Iron Phosphate".
is iron safe i heard it was very dangerous if a lot of it fell on you
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@ben_lubar said in "I used to work for Tesla…":
@Polygeekery said in "I used to work for Tesla…":
@LaoC said in "I used to work for Tesla…":
@Gribnit said in "I used to work for Tesla…":
It's a typo, it was meant to be LiFePO4
But what it said was polonium.
TBF this battery nomenclature is a bit confusing. "LiPo" is actually not supposed to be LiPO, but "Po" means "polymer" there.
In LiPO, yes. I believe he was talking about LiFePO4 batteries, which means "Lithium Iron Phosphate".
is iron safe i heard it was very dangerous if a lot of it fell on you
Be sure to wear a hard hat.
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@El_Heffe said in "I used to work for Tesla…":
(would look better if this shit software didn't enlarge the GIFs 600%)
No.
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@Polygeekery said in "I used to work for Tesla…":
@LaoC said in "I used to work for Tesla…":
@Gribnit said in "I used to work for Tesla…":
It's a typo, it was meant to be LiFePO4
But what it said was polonium.
TBF this battery nomenclature is a bit confusing. "LiPo" is actually not supposed to be LiPO, but "Po" means "polymer" there.
In LiPO, yes. I believe he was talking about LiFePO4 batteries, which means "Lithium Iron Phosphate".
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@JBert but I do. That's why I did. ;)
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@ben_lubar said in "I used to work for Tesla…":
is iron safe i heard it was very dangerous if a lot of it fell on you
Iron is about as safe as dihydrogen monoxide.
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@PleegWat said in "I used to work for Tesla…":
@ben_lubar said in "I used to work for Tesla…":
is iron safe i heard it was very dangerous if a lot of it fell on you
Iron is about as safe as dihydrogen monoxide.
So you're saying we should ban it? Because I've heard that DHMO is really really dangerous.
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@Benjamin-Hall I think banning iron and banning DHMO is equally wise.
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@Benjamin-Hall said in "I used to work for Tesla…":
@PleegWat said in "I used to work for Tesla…":
@ben_lubar said in "I used to work for Tesla…":
is iron safe i heard it was very dangerous if a lot of it fell on you
Iron is about as safe as dihydrogen monoxide.
So you're saying we should ban it? Because I've heard that DHMO is really really dangerous.
A textbook in a business ethics class I took had several paragraphs from Garrison Keillor about the dangers of DHMO. It appeared that the textbook's author was taking Mr. Keillor's writing as a valid source.
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@Polygeekery said in "I used to work for Tesla…":
@ben_lubar said in "I used to work for Tesla…":
@Polygeekery said in "I used to work for Tesla…":
@LaoC said in "I used to work for Tesla…":
@Gribnit said in "I used to work for Tesla…":
It's a typo, it was meant to be LiFePO4
But what it said was polonium.
TBF this battery nomenclature is a bit confusing. "LiPo" is actually not supposed to be LiPO, but "Po" means "polymer" there.
In LiPO, yes. I believe he was talking about LiFePO4 batteries, which means "Lithium Iron Phosphate".
is iron safe i heard it was very dangerous if a lot of it fell on you
Be sure to wear a hard hat.
Or else:
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@Weng said in "I used to work for Tesla…":
Lithium ion batteries burn vigorously and are prone to ignite after thermal or physical damage.
It's an innate property of the technology, much in the same way as "emissions from gasoline engines are Not Good™ for the environment" is a problem for literally everybody making anything using gasoline engines.I would also go so far as to say that gas tends to burn vigorously and is prone to ignite after thermal or physical damage.
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@dangeRuss said in "I used to work for Tesla…":
I would also go so far as to say that gas tends to burn vigorously and is prone to ignite after thermal or physical damage.
Thermal perhaps, but you can smash a bucket of gasoline all day and nothing will happen. Also, if you put out a gasoline fire with water it tends to stay out and is not prone to spontaneously reignite at random.
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@PleegWat said in "I used to work for Tesla…":
Iron is about as safe as dihydrogen monoxide.
You ever see a bunch of dihydrogen monoxide fall on something?
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@Polygeekery You got a downvote for that?
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@lolwhat said in "I used to work for Tesla…":
@Polygeekery You got a downvote for that?
Dude, I got a downvote for this also: https://what.thedailywtf.com/post/1403391
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@Polygeekery said in "I used to work for Tesla…":
Thermal perhaps, but you can smash a bucket of gasoline all day and nothing will happen.
Don't go causing sparks.
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@Polygeekery said in "I used to work for Tesla…":
Also, if you put out a gasoline fire with water it tends to stay out
What world do you live in, in which the laws of physics and chemistry make this possible? That's literally the first thing anyone learns about dealing with fires: you can't put out an oil-based fire with water!
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@masonwheeler said in "I used to work for Tesla…":
@Polygeekery said in "I used to work for Tesla…":
Also, if you put out a gasoline fire with water it tends to stay out
What world do you live in, in which the laws of physics and chemistry make this possible? That's literally the first thing anyone learns about dealing with fires: you can't put out an oil-based fire with water! world do you live in where firefighters treat a gasoline fire the same as they do an oil fire? That's literally not even the same thing. TDEMSYR.Gasoline fires may be extinguished by smothering with wet rags, woolen cloth, sand, earth or ashes, if the amount of the fluid involved is small. If the amount is large, a little water spreads it; but a deluge of water smothers it. It is particularly important that any can or tank from which burning gasoline is boiling or flowing should be cooled with water to lessen the amount of vapor given off.
You fucking retard. Stick to things you actually know about. Stop talking out your ass.
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@PleegWat said in "I used to work for Tesla…":
@Polygeekery said in "I used to work for Tesla…":
Thermal perhaps, but you can smash a bucket of gasoline all day and nothing will happen.
Don't go causing sparks.
That would fall under "thermal". Also, a bucket of gasoline is pretty stable. You could grind steel with a grinder straight in to a bucket of gasoline all day long and never have an issue.
Dump it out on the ground on a hot day and the same thing would burn you alive.
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The second type of fire, which burns from gasoline, paint thinner, kitchen oils, propane and acetylene, requires a Class B fire extinguisher, which usually contains carbon dioxide. The use of water during these situations increases the risk of endangering human lives. Gasoline and oils float to the water's surface and continue to burn while water spills all over the place. Instead of lowering the temperature through water, cut off the fire's oxygen supply through exposure to carbon dioxide, which turns to white foam when expelled from a pressurized container.
http://eimagine.com/fire-safety-should-water-always-be-used-to-put-out-a-fire/
Class B
Fueled by: flammable liquids, greases, and gas
Best to extinguish with: liquid foam
Why not water: a solid stream of water can cause the fuel to scatter which will spread the flamesWhat happens when you use water on an oil-based fire:
You are spreading dangerous misinformation that can literally get people killed.
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@masonwheeler said in "I used to work for Tesla…":
You are spreading dangerous misinformation that can literally get people killed.
You are thinking that an oil fire in your kitchen and a cup of water or a garden hose are the same as firefighters drowning a car with water. You dumb fucking idiot. Seriously, stop talking out your ass.
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@masonwheeler said in "I used to work for Tesla…":
You are spreading dangerous misinformation that can literally get people killed.
You should tell this guy in the snazzy coat:
https://www.youtube.com/watch?v=p_0_zH6LTrY
You are misconstruing a vessel with gasoline ignited in it, which is very rare and difficult to even do without first heating the gasoline, with gasoline spread out and burning (which is 1000000000000X more likely to happen to anyone outside of a refinery).
Seriously, you can toss a lit cigar in to a bucket of gasoline and it will put it out. You can hold a lit match on an open container of gasoline and nothing will happen.
Yes, you fucking retard, if you are deep frying something and the oil gets so hot that it catches fire you should not put water on it. But that is not what I was talking about.
But, how do you think actual firefighters put out burning cars? With water.
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@masonwheeler said in "I used to work for Tesla…":
What happens when you use water on an oil-based fire:
That's what happens when you use water on boiling hot oil. The water instantly flashes to steam, and goes everywhere, taking oil with it, and aerosolizing the oil to create a big fireball.
If gasoline was that hot, plus burning, it wouldn't just burn. It'd go kablooey -- no water required.
In actual gasoline fires, the goal in putting them out is to smother the flame and cool everything down enough that it doesn't reignite the flammable gas vapors. Water works safely and adequately for this. Then when the fire is out, you ventilate and monitor to ensure that the gasoline vapors don't build up to flammable levels again.
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@Polygeekery said in "I used to work for Tesla…":
stop talking out your ass
I just can't help myself:
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@Polygeekery said in "I used to work for Tesla…":
Also, a bucket of gasoline is pretty stable.
Vapours.
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@anotherusername said in "I used to work for Tesla…":
@masonwheeler said in "I used to work for Tesla…":
What happens when you use water on an oil-based fire:
That's what happens when you use water on boiling hot oil. The water instantly flashes to steam, and goes everywhere, taking oil with it, and aerosolizing the oil to create a big fireball.
If gasoline was that hot, plus burning, it wouldn't just burn. It'd go kablooey -- no water required.
In actual gasoline fires, the goal in putting them out is to smother the flame and cool everything down enough that it doesn't reignite the flammable gas vapors. Water works safely and adequately for this. Then when the fire is out, you ventilate and monitor to ensure that the gasoline vapors don't build up to flammable levels again.
Yeah. When cooking oil or other oils are burning, it is the oils that are burning. With gasoline it is the vapors that are burning. You need to get the gasoline cooled off so it stops producing so much vapor. That is even if you can get a container of it to burn. It is remarkably difficult to do. As I mentioned, you could throw a lit cigar butt in to a bucket of gasoline and it would go out. You could drop matches in it all day and it is almost impossible for it to light. Oils burn because the entire vessel has been heated to the ignition point (600ish degrees Fahrenheit, depending on the oil). The only thing controlling the burn at that point is how quickly it can get oxygen. If you put water on that sort of fire it will immediately vaporize and atomize the 600ishF oil out where it has ready access to oxygen and you get a massive fireball.
With gasoline I suppose it would be a bad thing if you had a vessel of gasoline full to the brim that was heated up to produce plenty of vapor and you immediately dumped a large bucket of water in to it, displacing the gasoline on to the ground. That would be a bad thing, of course. But if the gasoline is already spread on the ground, as it is likely to be if it is burning since vessels of gasoline really don't catch fire easily (except gas cans, but it is the vapors burning and you should still spray them with water to cool off the can), spray the gasoline on the ground to cool it off and put it out.
This is all before we even get to the fact that
@masonwheeler completely took out of context what I said. I never even said to put out a gasoline fire with water. I said:@Polygeekery said in "I used to work for Tesla…":
Thermal perhaps, but you can smash a bucket of gasoline all day and nothing will happen. Also, if you put out a gasoline fire with water it tends to stay out and is not prone to spontaneously reignite at random.
Because if firefighters get called to a Car-B-Q they will put it out with water. And it will not likely reignite. But an electric car can catch fire weeks later.
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@PleegWat said in "I used to work for Tesla…":
@Polygeekery said in "I used to work for Tesla…":
Also, a bucket of gasoline is pretty stable.
Vapours.
The slightest of wind.
Seriously man, gasoline does not get dangerous unless it is spilled. If it is spilled and burning then you can spray all the water you want on to it without making the fire worse.
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Notice what the firefighters are using:
https://www.youtube.com/watch?v=h5M9tQFCDOA
Water. Not foam.
Here they use a fire extinguisher at the beginning, but they have a fire hose with water at the ready in case the fire extinguisher can't handle it. Later in the video they light a car on fire with a gas nozzle and you can see right before they cut the video the firefighters swooping in with a fire hose and it doesn't look like foam. It looks like water.
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@lolwhat Good night, sweet prince.
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