When will lithium battery safety be solved

by:CTECHi     2021-07-13

At around 8pm on April 21st, in the underground garage of Taide Huayuan Community, Yude Road, Xuhui District, Shanghai, a Tesla ModelS suddenly emitted white smoke, and then exploded violently. The fire quickly engulfed the whole Vehicles, the fire also affected an Audi and other vehicles nearby.

On the afternoon of April 22, an ES8 under repair at the Xi’an Weilai Authorized Service Center burned. According to relevant pictures, the ES8 was seriously damaged and its frame Almost burnt out.

On the morning of April 24, a BYD E5 in Wuhan also spontaneously ignited. The fire spread from the rear of the car. Fortunately, even if it was extinguished, it did not cause serious damage or casualties.

In just 72 hours, three consecutive spontaneous combustion incidents of electric vehicles have once again pushed the safety of new energy vehicles to the forefront. It is understood that news of spontaneous combustion explosions in new energy vehicles have occurred from time to time in recent years. According to incomplete statistics from the Defective Product Management Center of the General Administration of Quality Supervision, Inspection and Quarantine, there were more than 40 fire incidents in new energy vehicles last year. If we make a statistic of such events around the world, the number will be very huge.

As an emerging industry that the country has actively guided its development in recent years, the development momentum of the new energy automobile industry can be said to be advancing all the way by leaps and bounds. But what cannot be ignored is that from the initial anxiety about the mileage and the current concerns about the safety performance of electric vehicles, the various problems of electric vehicles have been confusing consumers.

In fact, battery research and development technology and the large-scale expansion of the electric vehicle industry have not increased at the same time. At the beginning, many people were anxious about the range of electric vehicles. Therefore, in order to increase the range of electric vehicles, electric vehicle manufacturers increase the number of battery panels for battery life. However, the battery panels are limited by the size of the body, and more batteries are installed in it, which will only increase the possibility of fire and explosion power of electric vehicles. In addition, the state's subsidy policy for high-density energy new energy vehicles has also accelerated the development of the electric vehicle industry to a certain extent.

We all know that most electric vehicles catch fire during the charging process, or just after charging. The safety of the lithium battery is affected by many factors, and many hidden dangers will be amplified during the charging process. If the thermal runaway of the lithium battery occurs, it is very easy to cause a safety accident.

According to the analysis of professionals, the main reason for the fire in electric vehicles is the battery. On the one hand, it is the quality of the battery itself, and on the other hand, there are also problems caused by the characteristics of the material. According to experimental data, once a lithium battery catches a fire, the fire spreads extremely quickly, and the violent combustion temperature may reach 600 ℃-1000 ℃, while releasing a large amount of toxic gas. This is also the reason why the impact of the spontaneous combustion explosion of electric vehicles is often huge.

Judging from the current situation, should we stop and think about the safety of electric vehicles before we chant into the era of new energy vehicles?

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