What are the reasons why lithium batteries explode?

Types of explosion The types of explosion of the battery cell can be classified into three types: external short circuit, internal short circuit, and overcharge. The safety of lithium batteries is not only related to the nature of the battery material itself, but also related to battery preparation technology and use. 1. The internal polarization is large; 2. The pole piece absorbs water and reacts with the electrolyte; the gas drum; 3. The quality and performance of the electrolyte itself; 4. The amount of liquid injection does not meet the process requirements when the liquid is injected; 5. Assembly The sealing performance of laser welding during the manufacturing process is poor, and the air leaks when detecting air leakage; 6. Dust and pole piece dust are likely to cause micro short circuits at first; 7. The positive and negative plates are thicker than the process range and it is difficult to enter the shell; 8. The problem of liquid injection and sealing , The steel ball sealing performance is not good, resulting in air bulging; 9. The shell wall is too thick when the shell is supplied, and the shell deformation affects the thickness; 10. The external environment temperature is too high, which is also an important reason for the explosion of the lithium battery pack. In addition, with regard to mobile phone lithium batteries, due to improper use, such as squeezing, impact and water ingress, the battery swells, deforms and cracks, etc., which will cause the battery to short circuit and cause an explosion due to heat release during discharge or charging. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete.