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Extinguishing the EV Battery Fire Hype

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Re: Extinguishing the EV Battery Fire Hype

#2
Does this article extinguish anything?

What does "per 100,000 sold" mean? Is that simply per 100,000 cars? This metric makes no sense unless you age-adjust vehicles; most EVs are And dismissing firefighters lack of knowledge and training and equipment to put out these fires is strange. It will be overcome, but it's a legitimate issue.

Re: Extinguishing the EV Battery Fire Hype

#5
> [Firefighters have] had 100 years to train and to understand how to deal with internal combustion engine fires,” the NFPA’s Andrew Klock told Vox. “With electric vehicles, they don’t have as much training and knowledge.”

> But MSB’s Per-Ola Malmqvist has developed webinars that explain how to safely put out battery fires. In a 2022 webinar, he described the tools and techniques that were used to put out a raging EV battery fire in 10 minutes using only 750 liters of water. In another webinar about EV fire suppression best practices, Malmqvist interviewed a firefighter from Vestfold Fire Service in Norway, where the extinguishing method Malmqvist recommends was tried for the first time in battling an electric-vehicle blaze.

Not surprising. However, I would have liked to have heard a better explanation of the problem about EV fires self-reigniting, which can happen hours or days later. They touched on it, but passed it off as lack of firefighter training.

https://www.cnbc.com/2022/01/29/electric-vehicle-fires-are-r...

Simply dousing the fire with water as mentioned in the article is not sufficient.

Re: Extinguishing the EV Battery Fire Hype

#6
My impression is that the concern with EV and battery fires is that they can occur in the home or while otherwise stationary, unexpectedly causing much more catastrophic damage. ICE fires, in contrast, seem to be mostly associated with collisions, or somewhat less so with driving; it seems uncommon for ICEs to suddenly catch fire in an enclosed building.

e.g., https://www.jstor.org/stable/44631649

I'm not an expert on this though, and these are just my general impressions, which is maybe the point of the article. On the other hand, it doesn't seem to address the nature of EV fires in a scientific, public-health kind of way.

I think the thing most people are concerned about is a question like "how likely is my car to cause my house to burn down just sitting in the garage, while I'm sleeping?" Maybe the answer to that is the same with ICEs and EVs but that's the question that needs to be addressed.

Re: Extinguishing the EV Battery Fire Hype

#7
post #6

My impression is that the concern with EV and battery fires is that they can occur in the home or while otherwise stationary, unexpectedly causing much more catastrophic damage. ICE fires, in contrast, seem to be mostly associated with collisions, or somewhat less so with driving; it seems uncommon for ICEs to suddenly catch fire in an enclosed building. e.g., https://www.jstor.org/stable/44631649 I'm not an expert o…

ICE fires aren't often related to collisions. I've seen a neighbor's house burn down due to a car that had been parked in their garage for hours combusting. I've had multiple ICE cars recalled for catching fire when stopped. In the examples in the articles they mentioned vehicles in parking garages and on cargo ships, those weren't moving.

Your general impressions don't reflect reality. Out of all the cars I've owned my ICE ones have been way more likely to burn down my house while sleeping than my EV. Your own article even starts off with "most occur in motor vehicles not involved in collisions."

Re: Extinguishing the EV Battery Fire Hype

#8
You'll never catch me with a lithium ion battery larger than ~150wH inside my home. I don't care how aggressively the statistics are massaged.

I've personally experienced laptop and cellphone batteries catching on fire and can see how something with 100x+ the capacity could cause some serious fucking trouble.

Anyone who has one of those 1kWh+ emergency power backup things sitting inside their house right now really needs to think twice about contingencies. Extend this thinking to an EV with 2 orders of magnitude more storage.

Can a gasoline car set itself on fire inside your garage entirely unattended? Sure. But I think it is much less likely to occur and the failure modes are more acceptable to me - I.e. I can inspect and anticipate if my gasoline car might be unsafe with more clues than around an EV car. You can smell gasoline. You can't smell a manufacturing defect in a battery pack.

Re: Extinguishing the EV Battery Fire Hype

#9
post #8

You'll never catch me with a lithium ion battery larger than ~150wH inside my home. I don't care how aggressively the statistics are massaged. I've personally experienced laptop and cellphone batteries catching on fire and can see how something with 100x+ the capacity could cause some serious fucking trouble. Anyone who has one of those 1kWh+ emergency power backup things sitting inside their house right now really n…

I wonder if, back in the days, you would have allowed your house to be connected to the electrical grid or the gas grid.

Re: Extinguishing the EV Battery Fire Hype

#10
post #5

> [Firefighters have] had 100 years to train and to understand how to deal with internal combustion engine fires,” the NFPA’s Andrew Klock told Vox. “With electric vehicles, they don’t have as much training and knowledge.” > But MSB’s Per-Ola Malmqvist has developed webinars that explain how to safely put out battery fires. In a 2022 webinar, he described the tools and techniques that were used to put out a raging EV…

Sure, but that seems like mostly a question of getting them to a place where that can safely happen. Once it is isolated, let it burn out if it reignites.

Putting it out the first time so that it can be safely moved is important.

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