The correct method to extinguish a lithium battery fire:
1. After the battery catches fire, the power supply should be cut off quickly and personnel should be evacuated in a calm manner and orderly.
2. Open the windows on both sides of the battery box to prevent smoke from harming people in the car.
3. Use water to extinguish the fire quickly and follow standard fire extinguishing methods. (A fire broke out at the Mingyang Battery Factory in Fenggang, Dongguan in 2014. The dry powder fire extinguishers used by employees were ineffective. Li Shujun, a Ph.D. in physics and graduate of the Institute of High Energy Physics of the Chinese Academy of Sciences, I think that due to the spontaneous combustion and explosion inside the battery, dry powder fire extinguishers would not be effective at the moment. way is to use'water to cool)
4. , wait for the battery module to cool before handling it and removing it from the battery compartment.
Overview:
1. Use a fire extinguisher to put out the flames. Usually after that the fire is extinguished and the battery continues to smoke. Most fire extinguishers can achieve this effect.
2. Since lithium batteries will reignite if not cooled, it is very important to use plenty of water to cool the battery. (Note) Continue watering.
3. It is best to move the burning battery outside and then call the fire department to deal with it.
4. Smoking is harmful to the body. Do not breathe smoke. Battery charging stand for bike shop.
Protection measures:
Once the lithium battery cell is overcharged to a voltage higher than 4.2V, it will start to produceand side effects. The higher the overload voltage, the higher the risk. Once the lithium battery cell voltage is higher than 4.2V, the number of lithium atoms remaining in the positive electrode material is less than half. At this point, the storage cells often collapse, causing a permanent loss of battery capacity.
If charging continues, since the negative electrode storage compartment has been filled with lithium atoms, subsequent lithium metal will accumulate on the surface of the negative electrode material. These lithium atoms will grow dendrites from the surface of the negative electrode towards the lithium ions.These metallic lithium crystals will pass through the separator and short-circuit the positive and negative electrodes. Sometimes the battery explodes before a short circuit occurs. Indeed, during the overload process,electrolyte and other materials break down to produce gas, causing the battery shell or pressure valve to swell and rupture, allowing oxygen to enter and react with the lithium. The atoms accumulated on the surface of the negative electrode thus explode.