If the Pacific Automotive Network ternary lithium battery catches fire, a carbon dioxide or ABC dry powder extinguisher can be used to extinguish the fire. When thoroughly inspecting the fire, do not come into contact with any high voltage components and always use insulated tools for inspection. ABC dry powder fire extinguishers, halogenated alkyl fire extinguishers (such as Hailun fire extinguishers), and water-based fire extinguishers can all be used.
1. Whether you can use water to check the battery status, the main thing is SOC status.
If it is 100%, it is not recommended to use water. Because high-charge batteries are prone to explosion when exposed to water (to be precise, high humidity), especially 18450 batteries which are common in the market.
If it is a device containing a normal battery or a used battery, vYou can safely use water as a coolant.
2. The choice should be based on the environment, which is the environment in which lithium batteries catch fire. For the initial extinguishing of lithium batteries (such as cell phones) in everyday situations, ABC dry powder fire extinguishers, halogenated alkyl fire extinguishers (such as Hailun fire extinguishers), and water-based fire extinguishers can all be used for continuous cooling. , a large amount of non-flammable liquid (such as water) should be used.
For some special lithium batteries, a more reasonable disposal is to remove other flammable substances and wait until they burn completely.
The principle of paying attention to water use is to pay attention to a large amount. The effect of ice is much less than that of water. At the same time, we must do atbe careful. the fact that there are no live installations or equipment in the surrounding area.
In addition, the actual fire extinguishing should always follow the principle of convenience. That is, if the lithium battery is confirmed to be smoking and burning, use any extinguishing agent or its substitute at hand. as soon as possible.
(Images/Text/Photos: Pacific Automotive Network Q&A)
ABCDry powder fire extinguisher, fire extinguisher haloalkyl (For example, Helen fire extinguishers and water-based fire extinguishers can be used.
Why do lithium batteries catch fire
1. Short -internal circuit: due to battery abuse, such as branch crystals caused by overcharge and overdischarge, impurities dust in the battery production process Wait, the deterioration will pierce the diaphragm, resulting in a micro-short-circuit. The release of electrical energy will cause the temperature to increase. The chemical reaction of the material caused by the increase in temperature will widen the path of the short circuit and form a larger one. short circuit current. This mutual accumulation reinforces each other, leading to thermal runaway.
2. External Short Circuit: A long-term external short circuit will typically burn out weak connection points in the circuit and will rarely result in thermal runaway events in the battery.
3. High external temperature: Due to the structural characteristics of the lithium battery, various reactions result in the generation of a large amount of heat. Melting of the diaphragm causes an internal short circuit and the release of electrical energy increases heat production. The consequence of this cumulative and mutually reinforcing destructive effect is that the electrolyte swill be ejected and cause combustion and fire.