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Question on car safety

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Old Sep 19th, 2018, 13:59   #11
Curmudgeon with a turbo

Last Online: Oct 3rd, 2019 16:00
Join Date: Nov 2014
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Originally Posted by Georgeandkira View Post
...The shining star of battery fires is a hydrogen explosion....
I see what you (kinda) did there...
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Old Sep 20th, 2018, 12:50   #12
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Last Online: Sep 25th, 2019 13:50
Join Date: Apr 2015
Location: Poynton, Cheshire

I once accidentally put a dead short on a battery and it boiled its acid under the back seat of my Mini Clubman, it filled the car very quickly with very nasty gas.
Luckily I got out quickly. Wouldn't like to be stuck in a car after an accident, and that happened, and not be able to get straight out!
My V70 P2 probably would fill up with fumes if that happened, as I don't think there is anything to vent the fumes out. And having been rear ended at high speed, it does make you think!
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Old Sep 23rd, 2018, 08:28   #13
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Last Online: May 12th, 2020 18:19
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Location: Northwich

As an Auto Electrician, i can tell you that the battery would not set on fire or give off gas in the event of being crushed in an accident.
the nature of the construction of lead/acid battery's is so when crushed the plates inside would short together and stop all electro-chemical reaction.
therefore no reaction = no heat = no fire.

as to the last comment on gas being produced, well that was due to being short circuit across the main terminals, which would cause a massive discharge of the battery, hence lots of heat generated and the gas given off by the battery, basically boiling sulphuric acid.

please rest assured that the normal car battery's will not set on fire in a collision.
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battery, crash

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