Can the explosion of lithium-ion batteries be prevented?

Cell phones, notebooks, etc. use lithium-ion batteries. The so-called lithium-ion battery is a device that relies on the movement of lithium ions between the positive and negative electrodes to achieve power supply and release. It requires lithium ions to shuttle between the positive and negative electrodes. Other influencing factors are clean exercise. In theory, this design is completely achievable, but in practice, because lithium-ion batteries are extremely sensitive products, any abnormal situation may cause battery problems. All lithium-ion battery explosions are caused by short circuits. The phenomena that cause short circuits include overcharge, overdischarge, overcurrent, and overheating. They are short-circuited through the internal structure of lithium-ion batteries. The so-called internal cause determines the meaning of external causes. The structure of the lithium ion battery itself is a process manufacturing process, and the process manufacturing process is difficult to 100% prevent the existence of defects. The positive and negative electrodes where the lithium ions stay should be clean, and the electrolyte and diaphragm should be free of impurities during the shuttle. However, during the manufacturing process, the electrolyte and the diaphragm are difficult to completely prevent metal dust, copper or aluminum foil and other debris. When people use improperly (overcharge, overdischarge, overcurrent) or put lithium-ion batteries in extreme environments (too high temperature), the lithium-ion batteries will overheat, and the quiet state of the fragments at room temperature will be broken, and the Thermal movement occurs in a hot electrolyte space. In the next step, if the fragments are close to the diaphragm, the hot fragments will affect the isolation purpose of the diaphragm and cause a short circuit. It can be seen that the short circuit is caused by two reasons: one is that there are impurities in the battery, and the other is that the impurities will move. The middle of the two is heat. Therefore, the short circuit must be accompanied by heat, and the heat is not necessarily a short circuit. In the third step, a short circuit will cause sparks, and the electrolyte is a flammable liquid. The sparks in a confined space will cause the battery to burn and explode. This is easy to understand. Therefore, there is now a polymer lithium-ion battery that replaces the liquid electrolyte with a gel electrolyte, which can reduce the probability of a short circuit. But it cannot be completely prevented. 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: What is the basic performance of the battery?