Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




540 posts

Ultimate Geek
+1 received by user: 173


Topic # 215083 11-Jun-2017 20:08
Send private message



Richard Hammond has nearly killed himself again, this time in the Rimac Concept One, an electric car.

I'm rethinking the idea that electric cars don't usually catch fire in crashes unless there's a short circuit.

Of course, it's not a crash but there is that dendrite problem with lithium batteries, e.g. the Samsung Note 7.

https://en.wikipedia.org/wiki/Rimac_Concept_One

https://www.carthrottle.com/post/heres-the-moment-richard-hammond-lost-control-of-a-rimac-concept-one/

Photo by Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=47154753

View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
1052 posts

Uber Geek
+1 received by user: 68

Subscriber

  Reply # 1798198 11-Jun-2017 21:29
Send private message

One problem with electric cars is that they carry large explosive devices in the form of their batteries.

Any damage to their batteries can lead to very spectacular explosions.

Telsa found this out and decided to redesign their battery packs to limit this normally explosive trait.

When you purchase an EV make sure the car maker has tested what happens when the batteries get damaged.

17467 posts

Uber Geek
+1 received by user: 2118

Trusted

  Reply # 1798200 11-Jun-2017 21:30
Send private message

I'd say it's the Li ion batteries. 

 

He got out just in time.

 

Imagine if you had 2 -3  kids strapped in securely in their car seats ... I'd say petrol is safer in a crash ... 


 
 
 
 


321 posts

Ultimate Geek
+1 received by user: 136


  Reply # 1798220 11-Jun-2017 23:04
Send private message

The impact of the crash likely cause either a battery pack puncture or internal damage such that there was either a short circuit or arcing. The cells themselves are flammable, so this can start a fire.

Tesla has had some car fires, you can read about below.

 

https://www.tesla.com/en_NZ/blog/model-s-fire?redirect=no

 

The general summary is that yes, the battery packs burn, but they are designed to vent the fire away from the passenger compartment to allow time for passengers to escape.


 

jjnz1: One problem with electric cars is that they carry large explosive devices in the form of their batteries.

 

joker97:

 

 I'd say petrol is safer in a crash ... 

 



Generally electric vehicle batteries are designed to burn, venting the flames away from the passenger compartment, rather than to explode.

Compare to a petrol car where damage to the fuel tank or lines will cause a pool of petrol under the vehicle, which can cause a large flammable vapour cloud, resulting in a much more rapid fire ball.


In my opinion the risks of either occurrence is very low in street use, but I think the wearing of a fire retardant suit is standard practise in motor racing as was happening here.


gzt

9150 posts

Uber Geek
+1 received by user: 1290


  Reply # 1798242 12-Jun-2017 06:20
Send private message

I see this one uses LiFePO4.

2086 posts

Uber Geek
+1 received by user: 999


  Reply # 1798248 12-Jun-2017 07:17
One person supports this post
Send private message

joker97:

 

I'd say it's the Li ion batteries. 

 

He got out just in time.

 

Imagine if you had 2 -3  kids strapped in securely in their car seats ... I'd say petrol is safer in a crash ... 

 

 

Yup. Petrol doesn't burn. Much safer.

 

 

 

 


5239 posts

Uber Geek
+1 received by user: 1481

Trusted

  Reply # 1798249 12-Jun-2017 07:41
Send private message

frankv:

 

joker97:

 

I'd say it's the Li ion batteries. 

 

He got out just in time.

 

Imagine if you had 2 -3  kids strapped in securely in their car seats ... I'd say petrol is safer in a crash ... 

 

 

Yup. Petrol doesn't burn. Much safer.

 

 

 

 

 

 

 

 

It does burn if you get a vapor (From a pool of petrol on the ground) and an ignition source. Will be a few things arcing out after a crash on an older vehicle if the main fuse didnt blow or could have a permanent feed running down the body that can ignite it. Scalding hot exhausts also seem to light stuff up. 

 

 


gzt

9150 posts

Uber Geek
+1 received by user: 1290


  Reply # 1798304 12-Jun-2017 09:03
Send private message

I googled for Leaf fires. There are next to none.

Supercars usually compromise safety for performance and I don't expect any different from the rimac car.

Different battery, different battery chemistry also, and then battery housing and impact protection differences are likely to be just as significant.

7653 posts

Uber Geek
+1 received by user: 731

Subscriber

  Reply # 1798316 12-Jun-2017 09:20
Send private message

I suspect the news media will be hyping  this to  how dangerous electric cars are.  The car didn't just catch it was the crash that did it.  Happens lots with gasoline cars as well but it doesn't get hyped the same way.. . 





Regards,

Old3eyes


2672 posts

Uber Geek
+1 received by user: 523


  Reply # 1798340 12-Jun-2017 10:06
Send private message

joker97:

 

I'd say it's the Li ion batteries. 

 

He got out just in time.

 

Imagine if you had 2 -3  kids strapped in securely in their car seats ... I'd say petrol is safer in a crash ... 

 

 

I'll let you be the one to put 2-3 kids in a supercar :)

 

Petrol or electric they are all designed to go a fast as Cr@p so they strip out as much as possible,

 

Petrol supercar fires are a "common" occurrence

 

http://lmgtfy.com/?q=supercar+fire


375 posts

Ultimate Geek
+1 received by user: 236


  Reply # 1798344 12-Jun-2017 10:11
One person supports this post
Send private message

Using this incident to judge the flammability of EV's is fundamentally flawed.

 

Supercars are made from a highly combustible material - carbon fibre. Petrol Lambo's etc burn to the ground very quickly as well.

 

EV familys car are made of metal (exactly the same as petrol family cars), so fire doesn't spread so quickly, giving you much more time to get the kids out of the back. 

 

 

 

Think about how burning petrol spreads out on the pavement, vs a burning battery. I think fire would spread slower from vehicle to vehicle in EV's.

 

 

 

Edit: spelling.


239 posts

Master Geek
+1 received by user: 57


  Reply # 1798365 12-Jun-2017 11:12
One person supports this post
Send private message

He's fine by the way.

1438 posts

Uber Geek
+1 received by user: 476

Subscriber

  Reply # 1798368 12-Jun-2017 11:13
Send private message

joker97:

I'd say it's the Li ion batteries. 


He got out just in time.


Imagine if you had 2 -3  kids strapped in securely in their car seats ... I'd say petrol is safer in a crash ... 



Yeah definitely.
Workout that way for the two German tourists who hit the bus.

Witnesses used fire extinguisher until ran out and watched the burn alive as they were trapped in the wreck...

14913 posts

Uber Geek
+1 received by user: 3815

Trusted
Subscriber

  Reply # 1798390 12-Jun-2017 11:53
Send private message

You know, this is going to be the source of a world wide ban on taking the Rimac Concept One and you won't be allowed to take them on aeroplanes and there will be threads about it that go on for months. 

 

I wonder if they will just adjust it so you can't put them in check on luggage but you can still carry them on!

 

 


1052 posts

Uber Geek
+1 received by user: 68

Subscriber

  Reply # 1798432 12-Jun-2017 13:02
Send private message

networkn:

 

You know, this is going to be the source of a world wide ban on taking the Rimac Concept One and you won't be allowed to take them on aeroplanes and there will be threads about it that go on for months. 

 

I wonder if they will just adjust it so you can't put them in check on luggage but you can still carry them on!

 

 

 

 

 

 

I was still allowed to take my Rimac on the plane morning.. Do you reckon they will do a recall?

 

 

 

 

 

 

 

 

 


1323 posts

Uber Geek
+1 received by user: 540


  Reply # 1798458 12-Jun-2017 13:24
Send private message

jjnz1:

 

networkn:

 

You know, this is going to be the source of a world wide ban on taking the Rimac Concept One and you won't be allowed to take them on aeroplanes and there will be threads about it that go on for months. 

 

I wonder if they will just adjust it so you can't put them in check on luggage but you can still carry them on!

 

 

 

 

 

 

I was still allowed to take my Rimac on the plane morning.. Do you reckon they will do a recall?

 

 

 

 

 

 

 

 

They won't force you to hand them back in, but the power companies will prevent them from working on their networks.


 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Netatmo launches smart home products in New Zealand
Posted 20-Nov-2017 20:06


Huawei Mate 10: Punchy, long battery life, artificial intelligence
Posted 20-Nov-2017 16:30


Propel launch Disney Star Wars Laser Battle Drones
Posted 19-Nov-2017 21:26


UFB killer app: Speed
Posted 17-Nov-2017 17:01


The case for RSS — MacSparky
Posted 13-Nov-2017 14:35


WordPress and Indieweb: Take control of your online presence — 6:30 GridAKL Nov 30
Posted 11-Nov-2017 13:43


Chorus reveals technology upgrade for schools, students
Posted 10-Nov-2017 10:28


Vodafone says Internet of Things (IoT) crucial for digital transformation
Posted 10-Nov-2017 10:06


Police and Facebook launch AMBER Alerts system in NZ
Posted 9-Nov-2017 10:49


Amazon debuts Fire TV Stick Basic Edition in over 100 new countries
Posted 8-Nov-2017 05:34


Vodafone VoIP transition to start this month
Posted 7-Nov-2017 12:33


Spark enhances IoT network capability
Posted 7-Nov-2017 11:33


Vocus NZ sale and broadband competition
Posted 6-Nov-2017 14:36


Hawaiki reaches key milestone in landmark deep-sea fibre project
Posted 4-Nov-2017 13:53


Countdown launches new proximity online shopping app
Posted 4-Nov-2017 13:50



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.