Why do lithium batteries for electric vehicles bulge?

The reason for the bulge of the lithium battery of electric vehicles The battery is the core component of the electric vehicle. I believe that all riders are familiar with the word lithium battery bulge. In recent years, the phenomenon of battery bulging is not uncommon, which makes many consumers very distressed. Because once the individual battery bulge appears in a group of batteries, the entire group of batteries must be replaced. 1. The safety valve pressure is too high. In order to ensure safety, the lithium battery of electric vehicles will have a safety valve. When the pressure in the electric vehicle battery rises, the safety valve will automatically open and release the pressure, so as to ensure the normal use of the battery . When the pressure in the battery rises, but the safety valve cannot be opened, the lithium battery will bulge. 2. The charging current is too large. Normally, the lithium batteries for electric vehicles processed by regular manufacturers have a certain charging current value, and because of various reasons, the voltage and charging current are too high, which can easily lead to electrode plates. The precipitation on the surface is too fast, which in turn leads to insufficient chemical reaction. At the same time, if the temperature inside the battery rises quickly but the charging is not timely, bulging will naturally occur. 3. Series overcharging. Some lithium batteries of electric vehicles are used in series, so that they can have more capacitance. When the series batteries are overcharged, it will also cause poor gas recombination in the battery, resulting in bulging of the lithium battery. . Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.