Recently, there has been a fire accident caused by an electric vehicle.
Occurs frequently. On February 25, a community in Fengtai, Beijing.
A fire broke out in an electric carport.
The burned area is 10 square meters.
It was preliminarily determined that the fire was caused by a battery failure.
On February 23, a small area in Nanjing.
Where electric vehicles are parked on the overhead floor on the ground**.
Causing fires in residential buildings.
As of 24 o'clock on the same day.
15 dead and 44 wounded.
How terrible are electric car fires?
It only takes 90 seconds to kill you
Once the electric car catches fire.
After 90 seconds, the temperature reaches 200
Toxic gas from the combustion of an electric car.
Enough to suffocate hundreds of people.
According to the statistics of the National Fire and Rescue Agency.
In 2023, a total of reports will be received nationwide.
Electric Bike Fire 210,000.
This is an increase of 17 compared to 20224%
Multiple accidents are.
Caused by improper charging of electric vehicles.
The indoor charging of electric vehicles deflagrates instantly.
The electric car charging in the back kitchen of the store exploded.
The charging in the corridor of the electric car is deflagrated.
The power batteries that are usually suitable for electric vehicles can be divided into two categories: lithium batteries and lead-acid batteries. Lithium batteries have become the preferred power supply for electric vehicles because of their high power density, light weight, and environmental friendliness. Why?
According to the statistics of the China Electronics Industry Standardization Technology Association (CESA), lithium batteries accounted for 97% of China's new electrochemical energy storage installed capacity in 20201%, which has a certain advantage in the market.
The most important factors that cause lithium batteries are overcharge and short circuit.
Overcharge
It mainly occurs during the charging process of lithium batteries. Due to the resistance present in the battery, the battery can accumulate a lot of heat during charging. The protection device in the lithium battery can protect the overcharge to a certain extent by detecting the voltage. However, when the overcharge time is too long and the voltage continues to be too high, the dendrite short circuit inside the lithium-ion battery is prone to occur, resulting in the continuous rise of the temperature and pressure of the lithium battery, resulting in ***
Short circuit
It mainly occurs during the use of lithium batteries. When the lithium battery is in use, its own temperature will continue to rise, and the battery will also maintain normal heat dissipation. If the battery temperature is too high due to external factors, it is easy to cause damage to the battery separator and cause a short circuit, resulting in excessive internal heat accumulation, triggering a chain chemical reaction, and causing the battery to burn.
In addition, the mixing of charging equipment for different brands of electric vehicles will also cause damage to the battery.
Electric car why.
Can't charge in the hallway?
The shell of an electric vehicle is usually a plastic object composed of polymers, which will produce a large amount of high-temperature toxic gases once burned.
If you bring an electric vehicle into your home or park it in an indoor evacuation passage, the smoke will spread indoors along the stairwell, which will lead to evacuation difficulties and smoke poisoning.
How to Prevent Electric Vehicle Fires?
Choose regular and qualified products
Use electric vehicles safely
Electric vehicles should be charged in the centralized charging pile in the community, and the plug should be unplugged in time after charging;
Do not charge with flying wires, and charge one by one with a fixed socket;
The charging time should not be too long, continuous charging for more than 12 hours or the charger is unqualified, it is easy to cause a short circuit and sparks;
Do not modify the decoration without authorization, modify and repair electric vehicles (such as installing audio, lighting modification, etc.), which is easy to cause overload of the line and cause fire.