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md Mukter
31 de jul. de 2022
In Discussões gerais
It will be stated that firefighters should put out a fire with very large and long-term water, and the NFPA emergency site guide even states that a minimum of 2,600 gallons of water is required. policy safety. Even if the high-voltage circuit of the electric phone database vehicle is disconnected, the energy will still remain in the damaged high-voltage lithium battery. Once the temperature is too high, the phenomenon of "thermal runaway" is prone to occur. Generally speaking, if the lithium battery is punctured, overcharged, and operated Excessive or other accidents, after entering 120 degrees Celsius, will accelerate the internal chemical reaction, causing the battery itself to overreact and catch fire. SAEJ2990 warns that even if a high-voltage lithium battery in this state is extinguished for a short time, it is very likely to re-enter the thermal runaway cycle and catch fire due to the temperature. The NFPA recommends that firefighters continue to cool the batteries with large and prolonged amounts of water for an hour or more even after the flames have died down to prevent re-fires. In three high-speed, high-intensity electric vehicle crashes investigated by the NTSB, the high-voltage lithium battery inside the vehicle reignited at least 15 times in total. Second-line personnel need to strictly control the risk of subsequent fires Even if it is extinguished, the energy remaining in the high-voltage lithium battery is still likely to cause a subsequent fire risk. For example, in the early 2011 Chevrolet Volt hybrid car was crash-tested for 3 weeks, and the battery was still damaged and caused a fire. In the 2017 Model X fire in Lake Forest, California, the Model X fire was extinguished for a while, but the Model X caught fire again after being pushed onto a flatbed trailer 45 minutes later, injuring the trailer operator.
ARTC, NFPA, or even Tesla's emergency manuals ,  content media
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