Maybe a bit irrelevant but why is the article calling it “China’s battery“? I feel like if the researchers were from any other countries academy of science, say France, the title would have simply been something like “scientists discover new ways for fireproof battery”. Maybe it’d say French scientists or so, but not simply “France’s battery”?
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I thought sodium batteries had considerably less energy density than conventional? Is that not a problem anymore? If that hasn't been solved, I don’t see how this helps make EVs safer.
They indeed have less energy density, but I don't get your point about less safety.
They work better in high and low temperatures, can be charged a lot faster and don't degrade as fast. Sodium isn't as reactive as Lithium, lowering the risk of fires.
My point is that if they have less energy density, they aren't a particularity great choice for EVs, as the increased battery size to get the same capacity makes the whole thing much heavier, requiring even more battery to move it.
I guess for like short range vehicles, it might be fine, but at least around here, thats gunna be a pretty tough sell, because everything is spread out.
It can’t really make EVs safer if its not being used for them due to the drawbacks, is all.
ICE engines use a bunch of physical space for accessory components related to the engine. Li-ion powered e-cars reclaimed a ton of that space (i.e. Tesla has a frunk)
Perhaps next using a bit more space for a less dense sodium battery in exchange for a vehicle that is 0% explodable is a worthy trade (if claims are true).
Putting part of the battery in the front, in the crash zone, is going to reduce safety, not improve it.
One of the main things that improved EV safety over ICE cars is the frunk itself. By removing that massive engine from the front and replacing it with a crumple zone, the car becomes much safer in front impacts.
Do you have a source for that or is it just a conclusion you reached?
The reason I ask is that I vaguelly remember of seeing somewhere that the way the front of modern ICE cars is designed makes the engine literally fall when a high-speed frontal collision happens exactly so that the front can act as a crumple zone rather than the engine being pushed inside the passenger compartment. That being so, things aren't quite as simple as you say and I think we need actual real world test results showing that difference in safety rather than mere expectations extrapolated from superficial knowleged about cars.
I looked it up. 2022 IIHS crash tests showed the Tesla model 3 as being much safer in front impacts.
Modern cars may make the engine fall in a crash, but it’s still better not to have that mass there in the first place. Having said that, the safety advantages of a frunk may be reduced if you have a bunch of heavy cargo in there.
The safest car is the one that crashes less.
Maybe try reading what you try to use as a point against them?
Interestingly, the study attributes the problems to the drivers not the cars.
Its like the BMW drivers are dicks, not that the car isnt safe.
AP accidents happen because idiots do things like keep the foot on the accelerator while fumbling their phone and trying to get it from the footwell or just dont pay attention. DONT BE THAT PERSON.
Edit: to add, if you're an idiot who already uses their phone while driving, I do believe that they are likely being even bigger idiots when they have something like AP, but these people were always using their phones while driving. It might even attract them to it and bring more idiots than usual to any specific brand.
Who wants a more front-heavy car? That's just a recipe for understeer and I prefer having the ability to turn on ice.
I guess they suggested, that the batteries won't be used in EVs, as long as their capacity is significantly lower.
I recall reading the same.
Sodium batteries make loads of sense for house batteries like solar storage.
They should be the default for solar installations and grid-level storage, but are too new.
They can also replace lead-acid batteries for many applications.
Lithium will still rule microelectronics and wearables, but all lower density stuff should switch to sodium.
That being said, for cold environments like Scandinavia and the US Midwest & canada, sodium ion works better in both cold and heat swings than Lithium variants that it might be worth the tradeoff in capacity because in the long cold months, the reduced capacity and performance of lithium chemistries would completely close the gap anyways.
I would love this for my home, as well as at a smaller scale for my homelab, and even potentially things like power tools.
Just recently a friend doing a home reno project had one of their drill batteries achieve thermal runaway, fortunately while they were home. Made me really think twice about the pile of tools in my garage.
I'd trade in just about every portable-scale Li-ion battery I own for a slightly less energy dense but safer alternative.
They have considerably less energy density yes, but that was also the case for LFP batteries in the past.
LFP batteries have improved now though over the years and can now go quite reasonable distances, making the more expensive higher energy density batteries like NCM only needed for the longer range or performance variants.
The same should happen to the sodium based batteries, and LFP will eventually get to the point of the longer range types in the future.
Eventually, the range of the higher density types won't be needed, and they'll simply start including fewer cells of them to get the sweet point range which will then bring their costs / weight down when compared to lower density types, but it's possible by that point maybe the lower density types simply dominate due to their general lesser cost?
All of this of course assuming something like solid state batteries don't have their breakthrough low cost long lifespan moment.
Yea but if it’s half the price people are willing to put up with a lot of inconveniences.
Idk about that. Electric cars have been half the price to drive and people still buy gas cars due to the 'inconvenience' of long charge times on road trips.
I think lot of people not too serious about buying electric dont really understand the savings either.
They see a bigger monthly payment and dont account for how much in gas they'll pay, plus some of the extra more immediate maintenance like oil changes. Its harder to think about the longer term maintenance though.
And no amount of performance improvements is going to change the minds of those people. Either they’ll finally try electric and realize how great they are or eventually die out. Either way ICE is going to be the oddity one day.
This from the people that gave us fireworks... traditions disappear so fast...
the chinese invented gunpowder centuries ago
the same people that invented fireworks (thing that is set on fire and goes boom) now actively research/made the safe batteries (things that DON'T set on fire AND don't go boom)
Sodium is absolutely less of a fire risk which is good and is made of less rare earth minerals which is also a bonus.
The major downside is the energy density. If I am not mistaken it is about half of current litium ion batteries. Which would result in a halving of range for the same weight.
On top of that, if they ever get them into production, the solid state Lithium ion batteries are not only more energy dense than current batteries, they are also safer due to the lack of flammable liquid electrolites.
In conclusion with what I know, I doubt most cars will use sodium ion batteries. I would see them as great home batteries for solar installations. And maybe batteries for farm equipement or construction vehicles although the weight might become an issue.
Sodium batteries are only 30% less energy dense, but cost half as much as lithium and work better in lower temperatures. Most cars will use sodium chemistry and the shift is already taking place.
See the "working better in lower temperatures" is what im interested in. I would love an EV if we had the infrastructure to support it, but as they are right now there is little incentive to build the infrastructure because it's often too cold where I live and everything is so far apart.
Than my information was out of date because the in formation I had sodium was around 140w an lithium around 250w so not half but a large gap. But with the range anxiety most people already have I wonder if 30% less available power will be acceptable for them. And as I said before solid state Lithium should be a massive change and allow electric cars to rival diesel for range.
Aren't EVs already safer than gas cars?
I think the point is (I haven’t read the article) that once an EV is caught on fire, it’s extremely hard to extinguish it, because the battery tends to re-ignite afterwards.
I heard from a firefighter in my hometown (haven’t verified if true or not), the only way to extinguish it was to immerge the car.
But you are right, EVs are less likely to start burning in the first place compared to ICE cars.
Even immersing the car doesn't really stop it, it kind of just pauses the fire. When it's surfaced again and starts to dry it tends to self ignite again for a very long time. EV fires are extremely difficult to stop right now and the procedure usually boils down to "Let it burn itself out and keep everything around it from catching too."
Cover it in lead?
They put a blanket over burning car, and any occupants trapped inside because of doors that wouldn't unlock and laminated side glass, to keep it from igniting things around it. They'll also pull the burning car onto a flatbed truck to get it off the road, and take it to somewhere safer.
This is opposed to just dousing a gas car with water till it stops burning.
It's a bit of an outdated way now. The newer way is to inject coolant directly into the batteries.
The "they catch fire" argument is fucking bonkers anyway.
If there's one thing petrol cars are famous for, it's being filled with flammable liquids that can and do leak everywhere and combust upon collision.
You can ignore them. Same with all the disingenuous cunts who complain about wind turbines "spoiling the view" who ignore the coal and gas power stations that have littered the skyline for over a century.
You can put a petrol fire out in less than a few days though. Petrol doesn't magically catch fire upon seeing oxygen either.
Lithium fires are hard to contain unlike petrol fire:
https://www.yahoo.com/news/articles/firefighters-forced-submerge-electric-car-082852772.html
So does an airplane crash would be more horrifying than a car crash, but that doesn't change the fact that airplanes are safer.
Even so, any improvement is still good though
Ah, Lemmy. You never disappoint with sharing hilariously inaccurate information in comments!
ICE vehicles have far more fires. EVs are more intense, but significantly less frequent
Cool source. Ok, I'll bite. The number of fire deaths in Teslas alone drawfs the number of fatalities in the infamous Pinto. The number is being tracked by volunteers because there's no data from the NFPA or others that segments by EV vs ICE, but the number of highway vehicle fire deaths has been trending sharply upwards since 2016.
Tesla has sold nearly 8 million cars in total, with 3.5 million cars in 2023-2024 alone. There were 3.1 million Pintos ever produced in its 10 year run.
There are 27 fatalities linked to Pinto related fires and 83 related to Tesla fires according to your volunteer run source. The Pinto had a fatality for every 1 in 116,000 vehicles while Tesla, according to your source, has 1 in every 96,000. So the number of Tesla fire related fatalities does not "dwarf" the number of Pinto related fatalities. On top of that, a key difference is most of the Pinto fatalities were due to rear end collisions with no fault of the driver while Tesla's are much higher performance vehicles getting involved in high energy collisions due to driver (autonomous and human) errors.
Here is a list giving a different view of fatal accidents by car model. To quote the article:
“Most of these vehicles received excellent safety ratings, performing well in crash tests at the IIHS and NHTSA, so it’s not a vehicle design issue,” said Brauer. “The models on this list likely reflect a combination of driver behavior and driving conditions, leading to increased crashes and fatalities.”
Narrowing down the relevant information from your otherwise interesting comment, we can conclude that, if the sources are accurate, Teslas on average are more unsafe in terms of fire safety than the most unsafe internal combustion engine vehicle ever manufactured.
I think it's ludicrous to dismiss those concerns as "fucking bonkers" and that we "can ignore them." New addition to this list is that we can evidently also generalize all those EVs deaths as being "due to driver error," so I suppose good riddance? Not really sure what to make of that, but boy do these threads sure show the best of humanity.
I think Teslas shouldn't speak for all EVs.
the company has demonstrated a very high tolerance for risk. In execution, but also they don't seem to care about reputational risk. Other manufacturers with a larger business at stake, I would expect to handle recalls, safety in a different manner (one of the reasons they are lagging in the EV space)
So.. EVs have significantly less fires than combustion engines
But EVs fires are more severe
Tesla is a mess.
EV chemistry is getting better and safer over time.
Combustion engines are largely at their limit.
You have clearly made up a narrative you want to hear, that doesn't change the statistics that clearly shows EVs are significantly less prone (~20x) to catching fire compared to internal combustion vehicles.
How have I made up a narrative? My premise from the start was the absurdity of dismissing the dangers of vehicle fires, and there's data showing that a significant number of people die in EV fires. You've decided to argue that the deaths somehow matter less—that's making up a narrative to justify your, frankly, ludicrous position.
I'm sure that if somebody you loved died in such an event and somebody came along telling you that you're "an idiot" for having legitimate concerns, should be ignored and lumps you into a group of "disingenuous cunts," you'd have a different perspective.
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