A girl in Hangzhou died from injuries caused by an electric car explosion. What should you pay atten

When using a battery car, be sure to go to a regular dealer to replace the battery.

It was a moving electric car that suddenly caught fire. It is said that they were a family of three, followed by the father, his daughter and his wife on an electric scooter. But for unknown reasons, the sudden fire in the electric car caused serious burns to the father and daughter, and the girl's life could not be saved even after treatment. Today the daughter has died and the injured father has not yet recovered.

After an electric vehicle exploded and caught fire in Hangzhou, local police and firefighters participated in the investigation. According to the latest news, the causeThe main cause would be explosions and combustion caused by short circuits between lithium batteries in electric vehicles. Under normal circumstances, there is no risk of an electric vehicle battery exploding, which is almost impossible. However, upon investigation, it was found that the man's electric car was originally equipped with lead-acid batteries, but was later replaced with lithium batteries. It turned out that after the battery's storage capacity dropped, he replaced the battery with a new one for his electric car, but this time he replaced the lithium battery instead of the lead-acid battery , which made the battery model did not match the battery model. electric car. Maybe it's his electric car. The main reason why cars explode and burn while driving.

When using an electric vehicle, care should be taken to avoid deep discharge of the battery. New battery-powered cars must be fully charged before use. Since many battery scooters have been in stores for several months, you need to fully charge the battery before using it after purchasing it at home. Once fully charged, it should not be used immediately but should be left alone for 10 minutes. Overcharging will cause the active material of the plate to harden and fall off, resulting in water loss and battery deformation. In daily life, you need to ensure that your energy is sufficient to meet the needs of daily life. Once the battery runs out, you need to fully charge the battery. Do not continue to use it without power, as this will shorten the battery lifeie. battery.

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The working principle of lithium-ion batteries: lithium-ion batteries use carbon materials as the negative electrode and lithium-containing compounds as the positive electrode (according to different positive electrode compounds, lithium batteries Common -ion oxides include lithium cobalt oxide and lithium manganate, lithium iron phosphate, ternary lithium, etc.). There is a diaphragm in the middle to prevent the positive and negative poles from shorting. During the charging and discharging process, Li+ moves back and forth between the positive and negative electrodes: during charging, lithium ions are disintercalated from the positive electrode and integrated into the negative electrodethrough the electrolyte during discharge, the opposite is true. During the process of intercalation and deintercalation of lithium ions, the same amount of electrons are intercalated and deintercalated, which generates an electric current.

Compared with the complex structure of traditional fuel vehicles, the causes of fires in electric vehicles are relatively simple and are mainly caused by the thermal runaway of lithium batteries. Smoke, fires, and even explosions caused by thermal runaway are the most common characteristics of lithium-ion battery accidents. Thermal runaway is mainly caused by factors such as overload, external force and internal short circuit.

Since the power batteries used in electric vehicles are now composed of a large number of lithium battery packs, taking Tesla as an exampleexample, all of the power batteries are very large and placed on the chassis. In this way, it is easy to squeeze the battery when the vehicle collides, resulting in battery deformation, cracking, short circuit and other damage, triggering thermal runaway. The scary part is that the thermal runaway of one battery is likely to trigger a chain reaction, also causing other batteries to thermally runaway through heat generation.

The cause of the explosion in the entire incident was that a large bag carried by a passenger contained a lithium battery that needed repair. The main cause of the explosion caused by the spontaneous combustion of lithium. battery was the passenger. The driver jumped after the lithium battery spontaneously combusted. The car caught fire and crashed into a roadside flower bed. A passengersitting in the back seat died instantly and the driver was burned to the back and left leg. There are many natural causes for the appearance of lithium batteries. Drivers who bring lithium batteries that pose safety risks have the right to refuse to board the car, but the driver does not know at first that the passengers are carrying lithium batteries.

There are many reasons why lithium batteries spontaneously ignite and explode. When there is a fault inside the lithium battery, at the fault point of the state of charge, the battery temperature rises and the energy is excess, so the electrolyte decomposes to produce gas and internal battery pressure may cause spontaneous combustion or explosion due to rapid increase. The welding strength of aluminum shell or steel shell is equalally insufficient. When the internal loading pressure increases, the welding joint bursts. Oxygen in the air reacts with lithium metal deposited on the surface of the negative electrode, causing heat generation. combustion and explosion. The battery carried by the passenger himself is damaged and needs to be repaired, so the relevant services have not yet determined the cause of the spontaneous combustion.

Spontaneous combustion of lithium batteries in cars is very dangerous. The car itself is filled with gasoline. Once a fire breaks out in the car and ignites any part of the car, the fire spreads to the mailbox. the whole car will explode. Then everyone in the radius will take considerable damage. Is the driver responsible? His responsibility is that he did not take the corresponding emergency measures. When there were flames at first, he was able to stopimmediately instead of crashing into the flowerbed, which would reduce damage to passengers.

Every car must be equipped with a fire extinguisher, which is practical at the moment. For small fires, people can be evacuated first and then extinguished with a fire extinguisher to avoid unnecessary damage. There's a fire, then put it out. The passengers and surrounding people evacuated and called 119 to set the fire. When it's hot, try not to bring flammable and explosive objects into cars and confined spaces. To prevent fires.