What are the important reasons for the leakage of lithium batteries?

If there is liquid leakage, the main reasons are: 1. The internal pressure is too large; 2. The external package is unqualified. 1. In the process of battery manufacturing, if the following problems occur, it is easy to cause battery leakage: 1. When welding the battery shell and the cap, the welding is not firm, not sealed, there are leaks, virtual welding, and the weld has cracks and cracks. And other problems; 2. When the steel ball is sealed, the size of the steel ball is not suitable, and the material of the steel ball is not the same as the material of the cap; 3. The positive riveting of the cap is not tight, there is a gap, and the elasticity of the insulating gasket is not suitable, not corrosion resistant, and easy to age . 2. Problems that may occur during use: 1. The battery is not original, the voltage is too high or the current is too large; 2. The battery often bumps during normal use, damaging the aluminum-plastic film, and the internal strength of the battery is not enough; 3. Charging in an abnormal way leads to overcharging, or high current rate discharge (damage to the battery high current protection system) Statement: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: Where is the lithium battery? Several common repair methods?