Due to the use of lithium batteries, electric vehicles have a certain risk of fire, and battery fires are also common. Due to people's increased awareness of environmental protection and government support, the sales of electric vehicles have increased year by year. Every electric vehicle driver should have the awareness of scientifically responding to battery fires. To share with you several stages of lithium battery fire.

1.Overheat Warning

Lithium batteries will heat up before they catch fire. The battery managers of most electric vehicles have a temperature detection and alarm function. There is a fault light on the electric vehicle instrument to warn that the battery is over-temperature. The high temperature fault lights of different brands of electric vehicles are different. But basically the background is a battery symbol plus a warning symbol. If you find this kind of fault light on the instrument, you must arrive as soon as possible.4SShop detection. Battery overheating is more likely to occur during fast charging and high temperature in summer. High temperature will trigger the battery management protection mechanism and cut off the high voltage of the vehicle. If your electric vehicle often has inexplicable power outages, you must pay attention to whether the battery is over-temperature.. Battery heating is an important signal before the power battery accident, must cause enough attention, early detection and early treatment, can avoid personal injury and economic losses.

2. release smoke

When the internal short circuit of the lithium battery is no longer controllable, the electrolyte will be vaporized and decomposed by heat. Eventually, the battery shell will rupture due to too much pressure. High-pressure gas will be ejected from the rupture of the shell, and the gas will quickly diffuse to the weak part of the battery pack. Smoke can be seen in the car and chassis. If you find that there is unknown smoke inside the electric vehicle, you should stop immediately and leave quickly. Generally, lithium batteries only take tens of seconds from the release of smoke to the fire. The electrolyte vapor and acid gas contained in the smoke are harmful to the human body. A small amount of inhalation will stimulate the respiratory tract. Mucous membrane, a large amount of inhalation can cause poisoning. Therefore, in the case of smoke from electric vehicles, we must quickly stay away from the site of the incident and wait for professional fire forces to deal with it.

3. open flame

When the car or chassis starts to emit open flames, it means that the power battery of the electric car has been completely out of control, the faulty battery has spread the fire to other normal cells, and the battery that has caught fire has begun to ignite other batteries around, causing the fire to become more and more violent. The high temperature quickly destroys the normal battery, and the flammable materials in the battery burn violently and spray out flames. In the battery has appeared in the case of open fire, personal or professional fire has been unable to control the situation, because the fire source inside the battery pack, there is almost no way to control the fire, the fire department's usual practice for electric vehicles is to allow it to burn, while establishing an isolation zone to prevent the fire from spreading to the surrounding environment and vehicles.

Explosion in 4.

Explosion is a form of violent combustion. The explosion is caused by the instantaneous explosion of the expanded single lithium battery. The energy generated by the explosion will detonate other expanded single batteries, causing the explosion to intensify and threatening the surrounding vehicles and personnel. Once the electric vehicle battery explodes, it means that the electric vehicle is completely scrapped. Battery explosion is a serious extreme accident of electric vehicles. Objectively speaking, there are far more electric vehicle battery explosion accidents on the market than we have seen from the news. If we unfortunately encounter similar accidents, what we need to do is to stay away from the scene of the accident.

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