EV Fires

Chat about all things battery in here.
Need to know what type to use or size or capacity then again place your thoughts here
E30_Dave
Posts: 10
Joined: Fri Feb 08, 2013 12:22 am

EV Fires

Postby E30_Dave » Tue Feb 12, 2013 9:21 am

Hi all,

Does anyone know what power cell chemistry was in use in the converted Nissan Qashqai, which caught fire during charging on the DFDS ferry "Pearl of Scandinavia", in 2010 ?

I ask, as having skimmed through some of the articles and comments on different forums, a number of possible causes have been conjectured, however this question doesn't appear to have arisen.

User avatar
timpootle
Posts: 1362
Joined: Wed Mar 14, 2007 12:13 pm
Location: Chorlton-cum-Hardy, UK

Re: EV Fires

Postby timpootle » Tue Feb 12, 2013 5:44 pm

http://www.moto-mundo.com/node/1628

40 KW/h Ion-lithium batteries from Dow-Kokam
Tim Crumpton

GregsGarage
Posts: 870
Joined: Tue Apr 01, 2008 5:27 pm
Location: Galashiels, Scottish Borders
Contact:

Re: EV Fires

Postby GregsGarage » Tue Feb 12, 2013 5:48 pm

Any battery chemistry, including lead acid, can be involved in an EV fire. I wouldn't worry about what type of chemistry it was, instead try and understand all possible scenarios that could have occurred and then work out how to prevent those from happening to you. Nearly all EV fires are during unattended charging.
Greg Fordyce

Daewoo Matiz
http://www.evalbum.com/4191

E30_Dave
Posts: 10
Joined: Fri Feb 08, 2013 12:22 am

Re: EV Fires

Postby E30_Dave » Tue Feb 12, 2013 5:58 pm

True... and of course, that's exactly what happened in this case, but worse than that, even if the owner had had some means by which the BMS could have notified him (a pager or SMS to his mobile), he wold most likely not have been allowed on to the car deck whilst the vessel was at sea.

It would still be interesting to know though, as I've seen numerous comments from different people here, speaking out against Lithium Polymer cells... and I do wonder how many of the cars which have gone up in smoke were fitted with Li-Po cells, and had a system for...

a). shutting off the charge current...

and

b). keeping them cool.

Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: EV Fires

Postby Beemer » Wed Jul 24, 2013 7:36 am

The larger Kokams are not Lithium polymer (LiPo). However you are dead right about fires only happening while charging. They have been known to burst into flames slightly after the chargers knocked off too. All BMS related.
That car was mad, it had two Brusa chargers, cell voltages were set to the very top on charging. The fire meant all electric cars were banned on ferries... if I'm wrong there is no charging allowed anymore. The battery pack sat over all the mechanicals under the bonnet. When Nissan announcing it was going to make its own electric cars it was game over.

There is a surviving car. A couple of Dutch adventurers travelled around the world in it, mostly with a trailer carrying a generator with fuel. They did manage to lose it somehow but crossed the USA back to the EU ok.

Here's a video of the car and the intrepid explorers when they turned up to Jack Rickards EVTV via his blog. I know his blog has moved; scroll down some ;)
http://jackrickard.blogspot.co.uk/2011/ ... -2011.html

E30_Dave
Posts: 10
Joined: Fri Feb 08, 2013 12:22 am

Re: EV Fires

Postby E30_Dave » Wed Jul 24, 2013 4:21 pm

Very interesting, particularly Jacks Rickard's comments on the BMS used in the vehicle.

I still believe that one of the keys to safer charging is a means of cooling the cells, especially as they're invariable tightly packed into a space without adequate ventilation - and this is not so difficult a thing to achieve with a flat pouch-type cell.

Finally, Beemer please could you clarify your comment about Nissan, and "Game over" ?

David.

Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: EV Fires

Postby Beemer » Wed Jul 24, 2013 4:35 pm

No way!
The cells shouldn't get hot at all! There is no way you should be able to overheat them on a charge unless its very high C rates indeed. i.e. a 50KW Chademo...(2C) Even though my pack has not showed any sign of heating up when charging with one.
If they get hot when charging its either the BMS attempting to set on fire or the cells are being overvolted.

Beemer
Posts: 294
Joined: Sat Jun 04, 2011 12:10 pm

Re: EV Fires

Postby Beemer » Wed Jul 24, 2013 4:38 pm

Oh Dave, sorry, The "game over" quote. Simple, no conversion shop can sell "as new" conversions at anything like the same price as a major manufacturer.


Return to “All things battery related”

Who is online

Users browsing this forum: No registered users and 5 guests