What caused the explosion of a 12V lithium ion battery

12V lithium ion battery is a commonly used battery product category. It is very common in the product application of energy storage power supply and electric tools. The process of 12V lithium ion battery is relatively simple and mature, and it is not easy to explode. When encountering a combustion explosion accident, we First of all, it is necessary to analyze the structure and characteristics of the battery; protection board: if the lithium battery is charged separately, usually there is the power-off protection of the charger to protect the lithium battery in the case of overcharge failure of the protection board, but In some external devices that work through a power adapter, the protective board used by the supporting 12V lithium-ion battery requires high reliability. When the protective board fails, it is easy to cause the lithium battery to explode and burn; the battery cell: electricity The core is the basic component of a 12V lithium-ion battery, and quality and safety account for a large part of the proportion. Under the same circumstances, inferior batteries are more likely to explode or burn. Counterfeit faults are also an important factor in causing many explosions of lithium-ion batteries. Choosing high-quality batteries has a greater probability of reducing battery explosion and fire accidents; process technology: process technology is the key to determining the quality of lithium-ion batteries, and different manufacturers have different technologies. Therefore, you must choose a reliable manufacturer when buying a 12V lithium-ion battery; acupuncture: When a lithium-ion battery is damaged by acupuncture, it cannot be repaired. The damaged part will cause a local short circuit and a large amount of heat will occur inside the battery. Raising the temperature to the temperature at which the positive electrode thermally decomposes can cause the lithium battery to burn violently, thereby inducing a chain reaction of the entire battery pack, and ultimately leading to an explosion. Therefore, when using a 12V lithium-ion battery, it is necessary to completely avoid contact with sharp objects; impact: the impact will cause the lithium-ion battery to deform. When the impact force is too large, it may even cause the internal dislocation of the lithium-ion battery, resulting in abnormal heating and release of heat The battery is further heated to promote the thermal decomposition reaction of the positive electrode, which leads to the out of control of the heat; short circuit: the short circuit is the most direct culprit that causes the explosion and combustion of the 12V lithium ion battery. The short circuit is divided into an internal short circuit. The internal short circuit usually occurs when the battery wire is in use. Abnormal wear occurred, the insulation layer was peeled off and the battery contacted and caused a short circuit. The internal short circuit of lithium-ion batteries also leads to serious accidents; ambient temperature: when the ambient temperature is too high, the inside of the battery is like a reaction chain, and the positive electrode material will also be thermally decomposed in such an environment. Under such a sealed condition, the battery cell will bulge. , The pressure will burst to the limit. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the specific requirements for the design of the 12v lithium battery protection circuit?