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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
heh.. bet the insurance form for that one was a nightmare.
I often wonder if these things need to be better protected from impact and crushing, if a dog can do that then so could a small child.. doesen't bear thinking about. Gives a whole new meaning to "playing with fire"... 2011 style.
Registered Member #3040
Joined: Tue Jul 27 2010, 03:15PM
Location: South of London. UK
Posts: 237
Hm typical Daily mail over reaction though "killing the owners" er. they're still alive and the battery was "ablaze" yet the carpet was only "scorched" admittedly still scary for the owners but not much different to cats pissing into the backs of telly's and pets chewing through mains cables. If you have pets or kids then expect this sort of thing to happen and take sensible measures to prevent it. BTW could just have easily happened with Nicads, I've been known to run through the house holding a nicad with a pair of pliers to chuck it into the back garden because smoke was pouring out of it. I tend to agree with the short circuit theory in the comments rather than it being a lithium/saliva reaction. Oh and a nine year old with a mobile phone ?!?!?!?!?!?!
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
dog drool would be irrelevant, lithium is not all that reactive in aqueous conditions, me thinks the dogs teeth were the cause of that poor batterys' demise.... poor little battery, didnt have a chance.
Registered Member #3040
Joined: Tue Jul 27 2010, 03:15PM
Location: South of London. UK
Posts: 237
Oh dear :-
Sorry, that'd be a no go. How ridiculous do people get these days? Mobile phone batteries have typically around 1100mAh of charge. That's ONE 1amp in an hour at 3.7 volts. You produce a higher voltage charge by scooting your feet across a carpet and grounding on a metal surface (static electricity). Could that cause a fire? Sure if the carpet was soaked in a highly volatile solvent (gasoline is the low end of highly volatile). It is not physically or chemically possible for a cell phone battery to cause enough heat through total malfunction to start a fire. Not only are fire marshals mostly guessing, there are NONE which posses a degree in chemistry or electrical engineering and would be capable of making that determination.
- I fly video game planes for fun, KCMO, USA, 09/2/2011 16:32
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
with a short circuit current well in to the 10 amp range after the dogs teeth pierced the casing, there is plenty of energy density available for major flamage.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
i'll second that, I had a near miss with a mobile phone pack "vent with flame" incident. Triggered by sustained overcharging then poked with screwdriver at arm's length. Hint, DO NOT I REPEAT DO *NOT* TRY TO DUPLICATE THIS EXPERIMENT!!!.
I have it on video... Nuff said.
-A #include "video_deleted_from_youtube_due_to_TA2004.h"
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Sorry, that'd be a no go. How ridiculous do people get these days? Mobile phone batteries have typically around 1100mAh of charge. That's ONE 1amp in an hour at 3.7 volts. You produce a higher voltage charge by scooting your feet across a carpet and grounding on a metal surface (static electricity). Could that cause a fire? Sure if the carpet was soaked in a highly volatile solvent (gasoline is the low end of highly volatile). It is not physically or chemically possible for a cell phone battery to cause enough heat through total malfunction to start a fire. Not only are fire marshals mostly guessing, there are NONE which posses a degree in chemistry or electrical engineering and would be capable of making that determination.
- I fly video game planes for fun, KCMO, USA, 09/2/2011 16:32
Registered Member #509
Joined: Sat Feb 10 2007, 07:02AM
Location:
Posts: 329
Most definitely a short caused by the dog. Those prismatic Li-Ions are in thin aluminum cans vs the heavy steel cans that 18650s(laptops), and other cylindrical Li-Ions come in. Ive tossed cut open li-po's into a dish of walt water, and the only exciting thing which happens is a small amount of bubbling.
And double lol @ the "expert" complaining about lack of experts. Maybe he should clean the terminals on his cell phone battery with extra fine steel wool and tell us how there is no potential for starting a fire.
Registered Member #3637
Joined: Fri Jan 21 2011, 11:07PM
Location: Buffalo, NY
Posts: 1068
Patrick wrote ...
Sorry, that'd be a no go. How ridiculous do people get these days? Mobile phone batteries have typically around 1100mAh of charge. That's ONE 1amp in an hour at 3.7 volts. You produce a higher voltage charge by scooting your feet across a carpet and grounding on a metal surface (static electricity). Could that cause a fire? Sure if the carpet was soaked in a highly volatile solvent (gasoline is the low end of highly volatile). It is not physically or chemically possible for a cell phone battery to cause enough heat through total malfunction to start a fire. Not only are fire marshals mostly guessing, there are NONE which posses a degree in chemistry or electrical engineering and would be capable of making that determination.
- I fly video game planes for fun, KCMO, USA, 09/2/2011 16:32
As Martin King suggests, this guy is an idiot.
If the amount of electricity in a static charge was as much as this guy claims, we'd all be dead by now by static lightning. I hate people who *think* they know everything and act like they're the next messiah...
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Dog + Lipo = FIRE!!!!!!!
:-
