What is the reason for the short circuit of lithium ion battery

Metal foreign bodies that have not been trimmed during battery processing or use pierce the diaphragm or electrode, and the displacement of the pole pieces or tabs in the battery package causes the positive and negative current collectors to contact; (3) The quality of the lithium ion battery cell diaphragm does not meet the standard and is dried. It is caused by incompleteness; if the transition metal impurities in the positive electrode slurry are not cleaned, it will pierce the separator or promote the generation of lithium ion dendrites in the negative electrode and cause an internal short circuit; (2) The short circuit between the copper/aluminum current collector will be free on the surface of the negative electrode. Too much lithium will form dendritic crystals over time. The diaphragm cannot withstand the huge lithium flow in a short period of time, resulting in local or large-scale damage. Reasons for the short circuit of lithium ion batteries (1) The cathode material is impure or left in the air for too long, so low temperature will also cause the micro short circuit of the lithium ion battery, which directly causes the battery cell to heat up and become hot and damage; (4) Lithium ion In the process of battery recycling, due to the low capacity of the negative electrode material to store lithium ions or the rapid release of lithium from the positive electrode, etc., and the lithium ion battery pack is often charged and discharged with high current during use, and it is easy for the dendrites to grow to a certain length. Piercing the diaphragm causes a micro short circuit in the battery. Too low temperature also helps the growth of lithium ion dendrites. 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. Previous: Why do lithium-ion batteries get hot, catch fire and explode?