What is the cause of the swelling of lithium batteries in electric vehicles?

Reasons for the bulging of lithium batteries for electric vehicles: 1. The quality of the charger is inferior. The current price warfare, the quality of the charger has been declining. The use of inferior materials, refurbished or inferior components, heat generation, inaccurate parameter drift, makes the charging voltage limit out of control, resulting in lithium The squeezing of the gas inside the battery pack causes the battery shell to deform, crack, or even explode. 2. The charging time is too long. Some users don’t have the concept of time when charging. They think that they will stop when they are fully charged. Some even charge for two days and two nights. Only after using it, they think about it, charging for a long time. The battery life will be threatened. If overcharging will cause a large amount of gas to wash the plates, cause the active material inside the battery to fall off, shorten the battery life, accelerate the battery loss rate, affect the decomposition of the electrolyte, increase the battery temperature, and make it charge. drum! 3. Internal failure of the battery The internal battery plate group has quality problems, micro-short circuit, lack of acid leakage, lack of water, causing thermal runaway, increasing the internal pressure of the lithium battery, the safety valve can not release the pressure, and the exhaust valve hole is blocked. The increase of internal gas pressure causes deformation of the battery shell, cracking and swelling. 4. The reason for using a charger. Forgetting to bring a charger, just borrow one, or use several electric car chargers in a family. This phenomenon is very common. Each electric car battery brand has its own interface, current value, and different electric vehicles. The charging voltage and charging current of the car are different, the natural charging time and the charging efficiency are also different. The charger is used indiscriminately, the battery is large, the charger is small, the battery is undercharged, the battery is small, the charger is large, the charger is overcharged, the heat is out of control, and the drum will be charged. . Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Do you know the wrong way to use the battery?