What are the reasons that affect the safety of lithium-ion power lithium-ion batteries

Lithium-ion power lithium-ion batteries under some abuse conditions will lead to strong use between the electrode and the organic electrolyte. If the large amount of heat generated by these reactions cannot be dissipated into the surrounding environment in time, it will inevitably lead to the appearance of thermal runaway in the battery, and eventually It causes the battery to burn and explode. Therefore, the thermal stability of the positive and negative electrodes and the organic electrolyte for mutual use is the primary factor restricting the safety of lithium batteries. 2. Combustion caused by collision is the same as the power bank will spontaneously ignite when violently impacted. Power lithium-ion batteries will also ignite spontaneously when impacted. Regarding lithium-ion power lithium-ion batteries, severe deformation caused by violent collisions will cause lithium-ion power lithium-ion If the battery is short-circuited inside, the energy of the battery will be released from the short-circuit point in one breath, causing local heating, which in turn causes positive and negative electrodes, electrolyte analysis, and thermal runaway. 3. The impact of battery design on safety ①The high energy density of the battery will cause thermal runaway reaction, and the release of high heat will easily lead to unsafe behavior; ②Lithium-ion power lithium-ion battery adopts organic electrolyte system, and the organic solvent is carbon Hydrogen compounds are easily oxidized at around 4.6V, and the solvent is flammable. If there is leakage, it will cause the battery to catch fire or even burn or explode; ③The overcharge reaction of lithium ion power lithium ion battery will be caused by changes in the structure of the positive electrode material. The material has a strong oxidizing purpose, and the solvent in the electrolyte is strongly oxidized, and this purpose is irreversible. If the heat caused by the reaction accumulates, there is a danger of causing thermal runaway. 4. Selection and evaluation of battery cell material The nature and safety of the battery cell are largely determined by the selection of the battery cell material. If the raw material is not evaluated in depth when selecting the battery cell material, it will inevitably be caused in the first stage. Insufficient cell safety, try to choose materials that match the potential of the electrochemical window of the electrolyte and have less reaction heat to improve cell safety. 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: The primary component of lithium battery electrolyte