Will polymer lithium batteries burn or explode at high temperatures?

Are polymer lithium-ion batteries easy to burn or explode at high temperatures? Do polymer lithium-ion batteries simply burn or explode at high temperatures? Generally speaking, the explosion of soft-pack polymer lithium-ion batteries is rarely caused by external circuit failures. , Which means that the vast majority of lithium-ion battery explosion and incineration incidents are caused by internal planning flaws. The research on the thermal runaway mechanism of lithium-ion batteries in the battery industry is not in-depth, and we still lack research on battery planning and production safety control. The improvement of the safety and quality of lithium-ion batteries is basically based on the advancement of information technology. Do polymer lithium-ion batteries simply burn or explode at high temperatures? Polymer lithium-ion batteries will not burst in high-temperature environments; lithium-ion batteries operate at temperatures ranging from -20°C to +50°C. Low temperature will affect the function of lithium-ion batteries, reduce capacity and increase internal resistance; when the temperature is normal, we can recover. Flexible polymer lithium-ion battery is a new type of battery with high energy density, miniaturization, ultra-thin, lightweight and high safety. In terms of shape, lithium polymer batteries have the characteristics of ultra-thin, which can meet the requirements of various products and be produced into batteries of any shape and capacity. The minimum thickness of this battery can reach 0.5mm, no memory effect. Soft polymer lithium-ion batteries are lithium-ion batteries made of soft polymer electrolyte and lithium-ion battery products. Under normal use, they will not burst in storage unless short-circuit damage is caused by external forces. At that time, polymer lithium-ion batteries were mostly soft-packed batteries with aluminum-plastic film shells. When the organic electrolyte is used inside, even if the liquid is hot, it will not burst, because the aluminum-plastic film polymer battery is made of solid or colloidal state, there is no liquid leakage, but it is naturally broken. Under what circumstances will the polymer lithium ion battery burn or explode? When the polymer lithium ion battery attacks a short circuit, an ultra-high short circuit current is formed inside the battery, and a large amount of heat suddenly occurs, which is likely to directly attack out of control and cause combustion and explosion. The collision and damage of the battery caused by the traffic accident of the new energy vehicle caused the lithium-ion battery to be short-circuited and burned. Calculations show that charging, short circuit, and knocking are important conditions for the spontaneous combustion of new energy vehicles. In lithium polymer batteries, even if one battery loses control, the energy released by a small battery will not cause the entire battery to burn and burst. However, a battery pack composed of small-capacity batteries has a complex structure and low system integration efficiency. Small-capacity batteries must use positive and negative data with higher energy density. The soft lithium ion battery is seriously overcharged. The chemical system of the lithium ion battery determines that when the battery is overcharged, the LiCoO2 inside the battery becomes Co3O4. Co3O4 is a strong oxidant that can react with the electrolyte and attack the gas (O2). When the battery voltage is close to 5V, most of the batteries will burn or explode due to internal short circuits and other reasons as the internal temperature of the battery rises and the gas pressure is affected. Lithium polymer battery is heated by high temperature. When the battery is heated at high temperature, the electrolyte will be boiled and divided. The internal pressure of the battery and the melting of the battery isolation film inside will cause an internal short circuit. The battery may cause combustion. When the cathode material is fully charged, at a certain temperature , Will attack the autocatalytic reaction and burn. Solution: At present, it is important to use lithium polymer battery maintenance board, PTC, special charger, and fuse to maintain the battery. In the maintenance board battery, charging, discharging and over-current level maintenance, PTC is the battery for the secondary maintenance of the battery overheating cut-off current in the case of large short-circuit current, the charger is to limit the charging current and voltage of the battery, and with a small fuse, it is now The important purpose is to cut off the cohesion of the battery and the open circuit when the battery voltage or current is abnormal, to ensure that the battery will not be used again, and that the battery will not have serious safety problems. 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: Process flow of 18650 cylindrical battery sleeve labeling machine