Do you know any safety hazards of iron-lithium-ion batteries?

It can be seen that the damage of the SEI film on the appearance of the negative electrode leads to a violent exothermic response between the highly active lithium-intercalated negative electrode and the electrolyte, which is the direct cause of the temperature increase of the iron-lithium ion battery and the thermal runaway of the battery. The flammability of electrode materials: The organic solvents recovered from lithium batteries are flammable and have a low flash point. Thermal runaway caused by unsafe behavior can easily ignite the low flash point flammable liquid components and cause the battery to burn. The carbon materials, barriers and positive conductive carbon of lithium batteries are also combustible. The probability of burning iron-lithium-ion batteries is higher than the probability of battery explosion, but the explosion of the battery will definitely accompany the combustion. In addition, when the lithium-ion battery cracks and the ambient humidity is high, the moisture and oxygen in the atmosphere can easily produce a violent chemical reaction with the lithium-intercalated carbon negative electrode, releasing a lot of heat and causing the battery to burn. The flammability of electrode materials is a major difference between lithium-ion batteries and water-based secondary batteries. The electrode material and electrolyte of the iron-lithium ion battery are flammable. Heating (internal or external) can cause a fire and analyze and present gas, thereby increasing the probability of battery explosion. In addition, the strength of today's polymer insulation film is relatively low, and it is very easy to damage this film in a collision or overheating environment, resulting in a short circuit of the lithium-ion battery. At the same time, defects in the manufacturing process are also very easy to trigger the safety of iron-lithium-ion batteries. For example, the pole ears of the battery cell are too long, and the pole piece or shell is caused to short-circuit; the pole ears press the winding core, causing the positive and negative poles to short circuit; leaving metal powder, copper foil, aluminum foil fragments between the north and south poles may cause the barrier to perforate This in turn stimulates a series of problems such as micro short circuits. Lithium-ion batteries will have a fever during charging and discharging. If the heat presented is higher than the heat dissipation capacity of the battery, the lithium-ion battery will overheat and the battery material will produce SEI film analysis, electrolyte analysis, positive electrode analysis, and negative electrode analysis. Crushing side effects such as the reverberation with the electrolyte and the reverberation with the negative electrode and the binder. The external factors that affect the safety of iron-lithium-ion batteries are relatively complicated. For example, overcharging, external short-circuits, and violent impact may all trigger the spontaneous combustion of lithium-ion batteries. After the lithium battery is produced, before reaching the consumer, a series of tests will be held to ensure the safety of the battery and reduce the potential safety hazards. 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 article: What parameters should be clarified when customizing lithium-ion battery packs