Do you know what causes the explosion of lithium batteries?

Why does a lithium battery explode? ⒈ Too high water content. Water can react with the electrolyte in the lithium battery cell. When the gas is processed and charged, it can react with the generated lithium to generate lithium oxide, which causes the capacity of the battery cell to be lost, which is easy to use. The cell is overcharged to generate gas. The decomposition voltage of water is low, and it is easy to decompose to generate gas during charging. When this series of generated gas will increase the internal pressure of the cell, when the shell of the cell cannot withstand it, Lithium batteries will explode. ⒉Internal short circuit Due to the internal short circuit phenomenon, the battery core discharges with a large current, a lot 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 decompose into 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 overcharged core is overcharged, the excessive release of lithium in the positive electrode 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 deposition on the surface of the negative electrode. Moreover, when the voltage reaches 4.5V or more At times, the electrolyte will decompose and process a large amount of gas. All of the above may cause an explosion. Most of the lithium batteries on the market are of poor quality, which are relatively more prone to accidents. This also gives consumers the illusion that lithium batteries are not safe. If you are using a lithium battery whose price is similar to that of a lead-acid battery, no one can save you in this situation. For lead-acid batteries using dilute sulfuric acid as the electrolyte, cracks in the battery shell, electrolyte penetration, and seepage into the cable trench will cause short circuits and sparks, leading to explosions. If overcharge occurs, the hydrogen evolution inside the battery will be serious, which will also increase the probability of explosion. In addition, lead-acid batteries are lacking in safety protection except for safety valves. Disclaimer: Some pictures and contents of articles published on this site are from the Internet. If there is any infringement, please contact to delete.