Page 1 of 1

EV batteries - where does the stored energy go after a crash...?

Posted: Thu Feb 20, 2020 5:21 pm
by dvenman
I saw this elsewhere - https://www.nfpa.org/News-and-Research/ ... ded-Energy

In short, it starts with a description of a RTA in the US involving a Tesla Model X, and the complications that resulted (e.g. battery fire reigniting a week later), then goes on to discuss some of the challenges that EVs raise for first responders. It's an interesting read from a number of perspectives - not least of which is that one of us may find ourselves in the vicinity of an accident involving an EV.

Re: EV batteries - where does the stored energy go after a crash...?

Posted: Thu Feb 20, 2020 9:38 pm
by Horse
If you think about the vehicles we happily drive around in, they're actually quite scary.

For example, if you have a modern car with an LPG conversion, then you're toting around a highly-compressed tin of gas which, if over-heated, could blast into low orbit, landing 100m or more away. Better still, a typical new car has a couple of dozen pyrotechnic devices.

Or it could, instead of the gas can, be several gallons of only slight flammable liquid. Of course, don't let it evaporate and become an explosive gas ;)

Re: EV batteries - where does the stored energy go after a crash...?

Posted: Thu Feb 20, 2020 9:42 pm
by GTR1400MAN
And some of us sit straddling the whole lot! :)

I'm more concerned about the electrical shock than the pyrotechnics of EVs but I hadn't realised the issues involved with dealing with fully charged batteries before this article.

Re: EV batteries - where does the stored energy go after a crash...?

Posted: Fri Feb 21, 2020 8:03 am
by Horse
Yes, think how many hours (via specific charging systems) it takes to charge an EV. Discharging isn't going to be a quick and simple process.

PS There's also the little firebombs that we happily carry with us, AKA mobile phones ;)

Re: EV batteries - where does the stored energy go after a crash...?

Posted: Fri Feb 21, 2020 12:10 pm
by crr003
Batteries? Passing fad. Hydrogen is the answer. What could possibly go wrong with that?

Re: EV batteries - where does the stored energy go after a crash...?

Posted: Mon Mar 02, 2020 9:33 am
by sussex2
crr003 wrote:Batteries? Passing fad. Hydrogen is the answer. What could possibly go wrong with that?


Very little at all and I blame it on the remaining diesel fuel.
Yours
Hindenburg