The probability that an electric vehicle equipped with a lithium battery will explode is uncertain and depends on the maintenance, lifespan, charging habits or quality of the electric vehicle battery. The internal structure of lithium batteries mainly includes battery cells, electronic protection boards and battery pack assembly process. In other words, lithium batteries are prone to spontaneous combustion and explosion in these three aspects.
There are many reasons for the spontaneous combustion and explosion of lithium batteries, such as overcharging, overcharging, internal short circuit, sudden increase in battery temperature, battery aging, quality problems, illegal assembly, etc. When the battery is overcharged, excess lithium ions overflow from the positive electrode and react with the solution, releasingheat to heat the battery, triggering the reaction between the lithium metal and the solvent, and the carbon embedded in the lithium and the solvent, producing a large amount of heat and gas, causing the battery to explode.
In addition, water entering the battery can also cause short circuit failure. Since lithium batteries are flammable internally, once the temperature is too high or the diaphragm inside the lithium battery is damaged, it will cause deflagration or even deflagration. blast. The signs before the lithium battery explodes are that the battery is bulged, cannot be charged, charging takes longer than before, the temperature is hot, and the battery is not fully charged, etc. Therefore, electric vehicle batteries should be checked regularly. Once these conditions are met, the load must bestopped and the battery needs to be replaced or repaired.
Lithium batteries for electric vehicles mainly use lithium iron phosphate and ternary lithium. If you use an unmatched high-current charger or purchase a lithium battery without BMS intelligent management and protection system, overcurrent may occur and cause lithium. Battery overload and short circuit. The explosive power of a lithium battery is equivalent to that of a small hand grenade.
The probability of explosion of lithium batteries of electric vehicles
The probability is quite high when the battery is overcharged, the excessive release of lithium from the positive electrode will cause the structure. of the positive electrode to change, and the lithium released too much lithium can easily not be inserted into the negative electrode and can easily cause the precipitation of lithium on the surface of thenegative electrode. In addition, when the voltage reaches more than 4.5V, the electrolyte will decompose to produce a large amount of gas. All of the above can cause an explosion.
The sign before an explosion is deformation due to heat generated during charging. The harmful consequences can be a short circuit, an open circuit or even an explosion. It is best not to place electric vehicles indoors when charging, because the battery will release flammable gases during charging, and charging in a sealed environment can easily produce explosive gas mixtures.
Detailed information
When charging an electric vehicle, you should pay attention to the following points:
1. Check the power. Power supply and whether the battery is electric liquid, otherwise, it should be replenished in time before charging;
2. Try to avoid charging the batuse at night and the charging time should not be too long. , generally not more than 8 hours;
3 . Avoid placing the electric vehicle charger on car mats, sponges and other places prone to heat and fire
4. Do not pile flammable and explosive objects next to the electric vehicle.
People's Daily Online - It is very dangerous for electric vehicles to catch fire while charging. You should pay attention to the following points when recharging science.
The probability is one hundred percent.
The probability that an electric vehicle's lithium battery will explode is about several hundred.a part. Although lithium battery explosions occur occasionally, they are relatively rare under normal use and charging conditions. Lithium batteries have high energy density and stability, and manufacture themnts often take various safety measures to reduce the risk of explosion. In order to reduce the probability of explosion, users should adhere to their charging habits, such as using original chargers, avoiding overcharging or overdischarging, and avoiding prolonged exposure to high temperature environments. Regular inspection and maintenance of the battery system of electric vehicles are also important measures to ensure their normal operation and safety.