What should I do if a lithium ion battery explodes and catches fire?

It is forbidden to use fire blankets and similar items to cover or wrap lithium-ion batteries or equipment containing lithium-ion batteries to extinguish fires; it is forbidden to move or remove lithium-ion batteries or equipment containing lithium-ion batteries that are catching fire/smoke from luggage; it is forbidden to remove lithium-ion batteries from Take out the lithium-ion battery that is catching fire/smoke/heating from the device. After effective fire extinguishing treatment, lithium-ion batteries, equipment containing lithium-ion batteries, or related luggage should be showered and cooled with water or other non-flammable liquids to prevent re-ignition of lithium-ion batteries. After confirming that the cooled lithium-ion battery or equipment containing lithium-ion battery is stable, personnel with personal protection should use water-injected trash cans, ice buckets and other auxiliary tools to move them to the toilet, operation room, and lowest risk of explosion area. Wait for areas with less risk and designate cabin crew. It should be noted that this method is suitable for low-voltage lithium-ion batteries such as lithium-ion batteries, because there is no danger of electric shock, if it is a high-voltage battery, you must be more cautious in order to find out whether the lithium-ion battery fires a dry powder or water. , National Chemical and Physical Power Supply Product Quality Supervision and Inspection Center, used experiments to test whether a dry powder fire extinguisher can effectively extinguish the fire source after a lithium-ion battery catches a fire. What will happen if a dry powder fire extinguisher is used to extinguish a fire on a lithium-ion battery? Refer to the figure below. After the fire is extinguished, it will re-ignite and cause a secondary explosion. Then why does the power bank re-ignite after using a dry powder fire extinguisher to extinguish the fire? Was it because part of the flame was not extinguished when the first fire was put out? Zhao Mingchao, deputy head of the fire station of the fire brigade of Beijing Capital International Airport Co., Ltd.: Dry powder fire extinguishers are not recommended for lithium-ion battery fires. Although the dry powder fire extinguisher can extinguish the open flame in the initial situation, the dry powder fire extinguisher cannot reduce the temperature inside the lithium ion battery, so the internal temperature of the lithium ion battery is still very high (usually above 100 degrees or even above 200 degrees), the internal chemistry The reaction continues, and after the heat is accumulated, it is easy for the lithium-ion battery to reignite. A quote from Li Shujun, Ph.D. in Physics from the Institute of High Energy Physics of the Chinese Academy of Sciences: The battery will be charged, left and tested for the first time before leaving the factory. If a short circuit occurs after charging, it will cause spontaneous combustion. There are two types of short circuits: internal short circuits and external short circuits. The cause of external short circuits may be caused during storage and transportation, while internal short circuits are the product itself. Li Shujun further explained that these problems include: during the processing, the environment is not clean, causing other substances to be contaminated on the positive and negative electrodes; the internal diaphragm cannot effectively separate the positive and negative electrodes, and there are defects. This will cause the electricity stored in the battery to be quickly released through the connection point, releasing a lot of heat instantly, and the battery temperature rises sharply, firstly causing the electrolyte, diaphragm and other combustibles to burn. When the temperature rises to a certain level, the positive and negative electrodes Material and aluminum foil will also burn violently, and the core temperature will rise above 1000 degrees Celsius, and a similar explosion will occur. 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 the previous article: How to detect the consumption of 18650 lithium-ion battery packs