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-   -   Anyone heard of a lipo catching fire due to a speedo fault ? (http://www.oople.com/forums/showthread.php?t=9027)

mobile chicane 11-03-2008 06:08 PM
Anyone heard of a lipo catching fire due to a speedo fault ?
 
Links please if you have ta

mark christopher 11-03-2008 08:24 PM
the only way they would do that is if
1/ the speedo had a dead short
2/ the user used them below the 6 volt cut off thery could swell
3/ over charged

nimh would do damage if speedo was faulty, as its not a cell fault in either case

caneye 11-03-2008 09:29 PM
Why is there a risk of fire if the lipo dips below 6v?

mobile chicane 11-03-2008 09:54 PM
whatabout if the speedo cought fire and set the lipo off ?

neiloliver 11-03-2008 10:01 PM
Quote:
Originally Posted by caneye (Post 103092)
Why is there a risk of fire if the lipo dips below 6v?
Unlikely. Low voltages cause performance/life issues in Lithium Polymer rather than safety issues. It is overcharge or over current that cause safety issues. If an ESC went dead short then this could cause a fire.

N

mark christopher 12-03-2008 09:51 AM
Quote:
Originally Posted by mobile chicane (Post 103102)
whatabout if the speedo cought fire and set the lipo off ?
what are you actually wanting to know?

mobile chicane 12-03-2008 05:04 PM
Quote:
Originally Posted by mark christopher (Post 103156)
what are you actually wanting to know?
baisicly if a spedo cought fire and it was next to the battery in the car would the burning speedo ignite the battery ?

mark christopher 12-03-2008 08:16 PM
yes it can in extreeme circumstances

[FONT='Verdana','sans-serif']EXTERNAL THERMAL DAMAGE – LiPo cells will get damaged by external heat. Most manufacturers recommend keeping the cells under 60 deg C or 176 deg F. In my experience, a cell will start to balloon up and the layers start to delaminate once the temperature rises above 90 deg C (194 deg F). If the temperature is extremely severe – the cell will go into thermal runaway and you will have a flaming mess. The thermal volatility is directly related to the cell chemistry. [/FONT]

sparrow.2 12-03-2008 10:34 PM
Quote:
Originally Posted by mobile chicane (Post 103270)
baisicly if a spedo cought fire and it was next to the battery in the car would the burning speedo ignite the battery ?
Are you really worried about this?

Assuming a speedo caught fire badly enough to ignite a lipo, the burning speedo would have been enough to trash the car. It wouldn't do Nimh's any good either being roasted by a flaming speedo going supernova.

Both scenarios are bad but highly unlikely and not really reason enough to not buy a lipo... (in my opinion at least...)

mobile chicane 13-03-2008 03:23 PM
Quote:
Originally Posted by sparrow.2 (Post 103372)
Are you really worried about this?

Assuming a speedo caught fire badly enough to ignite a lipo, the burning speedo would have been enough to trash the car. It wouldn't do Nimh's any good either being roasted by a flaming speedo going supernova.

Both scenarios are bad but highly unlikely and not really reason enough to not buy a lipo... (in my opinion at least...)

my thoughts as well but the posibility was out to me


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