Why do lithium batteries explode?
With the wide application of portable digital products and new energy vehicles, lithium batteries have entered thousands of households. Therefore, various safety accidents caused by lithium batteries are often heard. What is the reason for the fire and explosion of lithium batteries?
The main causes of the explosion are as follows:
1. The internal polarization of the lithium battery is large, which causes the internal short circuit of the lithium battery;
2. The pole piece absorbs water and reacts with the electrolyte caused by the gas drum;
3. The quality and performance of the electrolyte itself are caused by problems;
4. The injection volume cannot meet the technological requirements during injection;
5. In the assembly process, laser welding has poor sealing performance, and air leakage when measuring air leakage;
6. Dust and pole piece dust are likely to cause micro short circuits first;
7. The positive and negative plates are thicker than the process range, making it difficult to enter the shell;
8. The problem of liquid injection sealing, poor sealing performance of the steel ball, resulting in air bulging;
9. The shell wall is too thick in the incoming shell material, and the shell deformation affects the thickness;
10. The external PACK process causes an external short circuit of the lithium battery;
10. Excessive ambient temperature outside is also the main cause of explosion.
