Why do lithium batteries spontaneously ignite

⒈Using low-quality batteries with high moisture content, the water can react with the electrolyte in the lithium battery, and the processing gas can react with the generated lithium during charging to generate lithium oxide, which causes the capacity of the battery to be lost, and it is easy to overcharge the battery. The analysis voltage of the generated gas and moisture is low. It is easy to analyze the generated gas during charging. When this series of generated gases will increase the internal pressure of the battery cell, when the shell of the battery cell cannot withstand it, the lithium battery will Spontaneous combustion. ⒉Internal short circuit Due to the internal short circuit phenomenon, the battery core discharges with a large current, and a large amount of heat occurs, which burns the diaphragm and causes a greater short circuit phenomenon, so that the battery core will have a high temperature, causing the electrolyte to analyze into a gas, causing internal pressure If it is too large, when the shell of the battery cell cannot withstand this pressure, the battery cell will explode. ⒊When the overcharge core is overcharged, the excessive release of lithium in the positive electrode will change the structure of the positive electrode, and too much lithium will easily be unable to be inserted into the negative electrode, and it will also easily cause lithium deposition on the surface of the negative electrode, and when the voltage reaches 4.5V or more At the time, the electrolyte will analyze and process a large amount of gas. All of the above may cause spontaneous combustion. ⒋External short-circuit The external short-circuit may be caused by improper operation or misuse. Due to the external short-circuit, the battery discharge current is very large, which will cause the battery cell to heat up, and the high temperature will cause the diaphragm inside the battery cell to shrink or completely break, causing the lithium battery Internal short circuit, spontaneous combustion. 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 post: Explain the charging principle of lithium battery in detail