What causes the explosion of lithium batteries

1. Insufficient capacity of the negative electrode of the lithium battery When the capacity of the negative electrode of the positive part of the lithium battery is insufficient, the lithium atoms appearing during charging cannot be inserted into the interlayer structure of the negative electrode graphite, and will precipitate on the surface of the negative electrode and form crystals. The long-term formation of crystals in lithium batteries can cause short circuits. At this time, the battery cells are rapidly discharged, and a lot of heat will appear, which will burn the diaphragm. High temperature will cause the electrolyte to analyze into gas. When the pressure is too high, the cell will explode. 2. When the water content is too high, the water can react with lithium to generate lithium oxide, which will cause the capacity of the battery cell to be lost, and it is easy to overcharge the battery to generate gas. The analysis voltage of water is low, and it is very difficult to charge. It is easy to analyze the generated gas. When this series of generated gases will increase the internal pressure of the cell, when the shell of the cell cannot withstand it, the cell will explode. 3. Internal short circuit The short circuit of the internal battery cell causes a large current discharge, a large amount of heat occurs, which burns the diaphragm and causes a greater short circuit phenomenon, which will cause the electrolyte to analyze into a gas. If the internal pressure is too high, the battery cell will explode. Fourth, when the lithium battery is overcharged, the positive lithium will be excessively released, which will change the structure of the positive electrode. If too much lithium is released, it is easy to be unable to insert into the negative electrode, and it is also easy to cause lithium on the surface of the negative electrode, and when the voltage reaches Above 4.5V, the electrolyte will analyze and process a large amount of gas. All of the above may cause an explosion. 5. External short circuit The external short circuit may be caused by the wrong connection of the positive and negative electrodes. Due to the external short circuit, the battery discharge current is very large, which will cause the battery core to heat up, and the high temperature will shrink or completely destroy the diaphragm inside the battery core, causing an internal short circuit. , Which exploded. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.