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recently, with electric car fires attracting much attention, the tesla semi truck equipped with a large-capacity battery has had its first fire accident, which has attracted much attention! recently, the us national transportation safety board (ntsb) released a preliminary report on this complete burn fire accident, which has attracted people's attention.

the driver of the tesla semi truck was not injured in the fire. the vehicle was burned and the road was closed for several hours.

the tesla semi is powered by three independent motors on the rear axle. tesla has said that the semi consumes less than 2 kwh per mile (about 1.6 km). although the official battery capacity has not been disclosed, it is speculated that the version with a driving range of 500 miles (804 km) is about 850~900 kwh. the battery alone weighs more than 5 tons. considering that the battery capacity of an ordinary electric car is around 80kwh, it is about 10 times.

the ntsb report showed that the accident occurred at 3:13 a.m. the truck collided twice when it turned right on the road. the first collision was with a road sign set on a steel column. the second collision was with a tree with a diameter of about 30 cm. the truck then stopped against the tree and the fire occurred after the collision.

the situation became more serious after the fire broke out. firefighters had to use about 50,000 gallons (about 189,270 liters) of water in order to safely reopen the road. the firefighting work took 14 to 15 hours. the highest temperature measured by the thermal sensor reached 540 degrees celsius.

this is a temperature that can dissolve aluminum, so firefighters, worried that such high temperatures would cause the fire to spread to the surrounding areas, sprayed fire retardants on the area surrounding the fire to prevent it from spreading.

the amount of water used to put out the fire reached an astonishing level. it was enough to fill a water tank that was 2.4 meters high and 10 meters in circumference. because of the huge amount of water, no other damage was caused. but this accident once again reminded us of the seriousness of electric vehicle battery fires.

it is not clear why the driver left the road and the exact cause of the battery damage. in this regard, the ntsb said it will conduct further investigation. the ntsb also emphasized that the tesla driver did not use any automatic driving system when the accident occurred.

this incident has once again drawn attention to the safety of electric vehicles. in particular, fires in electric trucks equipped with large batteries are more difficult and dangerous to extinguish than fires in ordinary vehicles due to their characteristics.

it is relatively easy to extinguish fires in ordinary vehicles, except for fires in the fuel tank. this accident proves that it takes a lot of time and resources to extinguish fires in electric vehicles after the fire occurs inside the battery cell.

because large battery packs store a lot of energy. if a collision causes damage to the battery cells, a thermal explosion may occur and the fire will spread rapidly. battery fires continue to burn at high temperatures and are not easy to extinguish with conventional fire extinguishing methods.

this situation leaves a big challenge not only for electric vehicle manufacturers, but also for regulators and fire departments. there is an increasing need to re-examine the response strategy for electric vehicle battery fires and develop more effective fire extinguishing methods. in addition, research on battery safety design and collision protection technology is also essential.

in order to enhance the safety of electric vehicles, it is necessary not only to develop technologies that improve the stability of the battery itself, but also to develop new firefighting technologies and equipment that can quickly extinguish fires after collisions. it is expected that this incident will serve as an opportunity for the entire electric vehicle safety countermeasures to be further strengthened.

if safety issues are not resolved, not only will the popularization of electric vehicles, but also the commercialization of large electric trucks in the logistics and transportation industries will encounter great difficulties. from the perspective of automakers, fire safety has become a top priority in the design of future electric vehicles. formulating battery fire response measures is not only necessary to win consumer trust, but also a necessary step in the sustainable development of electric vehicles.