The spontaneous combustion of electric vehicles must be one.
Although there is no celebrity endorsement,
But every time there is spontaneous combustion and fire,
Friends circle and hot search list will always be brushed down.
Spontaneous combustion is not the "patent" of electric vehicles.
Fuel trucks will also spontaneously ignite.
But why do electric cars love hot search?
TA is not only highly concerned, but also more harmful.
The spontaneous combustion of electric vehicles is mostly
Caused by "thermal runaway" of lithium battery
TA will bring the following three dangerous situations.
The lithium battery exploded.
Lithium batteries are lively and easy to burn.
When the lithium battery loses thermal control.
A violent reaction will occur inside the battery.
Release oxygen and great heat.
Due to the limited space in the battery pack
This heat will accumulate in a short time.
If heat and gas are not released in time
The battery may explode.
Although the explosive power of batteries is not as strong as that of explosives.
However, TA will be accompanied by splashing of copper foil, electrolyte and other substances.
These substances are as high as1000 c.
It will not only burn and corrode the skin, but also form a new ignition point.
"Immune" to ordinary fire extinguishers
To tell the truth, electric cars put out the fire.
This is still a worldwide problem.
As we know, the principle of ordinary fire extinguishers is:
Spray carbon dioxide and dry powder to isolate oxygen.
Let the burning things "suffocate" the fire.
But unlike the spontaneous combustion of fuel vehicles,
The spontaneous combustion of lithium battery not only has fast reaction speed
And TA itself will also produce oxygen.
So ordinary fire extinguishers don't work on it.
The way to put out the fire with lithium battery is to cool down.
Therefore, what is currently encountered is the spontaneous combustion of electric vehicles.
The fireman's method is to rinse with plenty of water.
Take away a lot of heat to completely cool it down.
The escaping gas is highly toxic.
The main components of electrolyte in lithium batteries are
Lithium hexafluorophosphate (LiPF6)
This substance itself is harmful to the human body.
What is even more frightening is that during the combustion process,
LiPF6 also produces many toxic substances.
Such as hydrogen fluoride, carbon monoxide, HCN, etc.
Hydrofluoric acid will corrode bones.
If not cleaned up in time, you may face amputation.
And toxic gases such as HCN spread rapidly.
Once in the human body,
Light poisoning, serious life-threatening.
What should I do if I find that the electric car spontaneously ignites?
The stages of lithium battery spontaneous combustion are divided into
"Temperature rise-expansion-rupture-smoke-fire"
Generally, we find the abnormality of electric vehicles through smoke.
At this time, there is not much time to escape.
So remember not to try to put out the fire.
Running away is the most correct way.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.