It takes 24 hours to extinguish a fire in an electric vehicle's lithium battery and cool it down. When there is no external condition for ignition, the lithium will turn off and shut down.
Lithium-ion batteries are made up of three basic parts: 1. The positive terminal, usually lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, etc. 2. The negative terminal, usually it; is a material of graphite, lithium titanate, lithium silicon or lithium germanium, etc. 3. The electrolyte, usually an organic solvent obtained from nonaqueous salts, serves as a medium for the movement of lithium ions in the positive and negative electrodes, and as a battery insulator.
When a lithium-ion battery is hit by a weight of 5 kg and falls freely from a height of 0.6 m, 25 J of energy instantly appears inside the battery, causing ae increase in battery temperature by 120°C. Lithium ions have high activity, so this type of battery is very sensitive to external forces. When struck or dropped from a height, the battery heats up internally, causing it to spontaneously ignite.
In the event of a fire, first turn off the power supply. If the battery is charged under high heat, surface swelling, smoke, etc., it indicates that the battery will soon spontaneously ignite or even explode, so the power supply should be cut off as soon as possible.
When the battery ignites spontaneously, the battery should be cooled immediately and continuously. Using water to turn off the battery is the most ideal solution. If the fire is large, you can use an ABC dry powder fire extinguisher or carbon dioxide fire extinguisher to extinguish the open fire, and then use water to continue to cool the fire.damaged battery. Keep an eye on the auto-ignition battery. is still hot, continue to use water to cool the battery until it is completely cooled.