Share with friends and circles of friends with wechat scanning QR code < / P > < p > on January 30, electric vehicles are expected to help improve air quality, reduce fuel costs and become a new revenue growth point for automobile manufacturers. But with the transition to electric vehicles, new challenges follow: cars with lithium-ion batteries can be particularly dangerous when on fire < p > the good news is that electric vehicle fires do not happen often. Emma Sutcliffe, project director of EV FireSafe in Melbourne, Australia, said that researchers need more data to finally determine the fire rate, but preliminary research shows that pure electric vehicle fires are rare < p > research by autoinsurance EZ, another company, shows that the probability of ignition of battery electric vehicles is only 0.03%, while that of internal combustion engine vehicles is 1.5%. According to their research, hybrid electric vehicles are equipped with both high-voltage batteries and internal combustion engines, and the possibility of vehicle fire is 3.4% < p > however, satcliffe said that when the fire does occur, electric vehicles equipped with lithium-ion batteries burn faster, have higher temperatures, and need more water to be put out. In the first few hours or even days after the fire is controlled, the battery may catch fire again and put repair shops and other places at risk < p > chas McGarvey, Chief Fire Officer of the lower Merion fire department in Pennsylvania, said that his department encountered challenges when dealing with a Tesla Model s play fire in 2021. The car burned at a very high temperature and even melted the road below < p > satcliffe also said: "many times, firefighters and fire agencies just want to find a solution." With so many new models on the road, Pennsylvania fire department director McGarvey said: "we are still trying to understand all these things, but they change almost every day!" < p > Eric Wachsman, director of the Maryland Energy Research Institute, said that the characteristics of lithium-ion batteries strong enough to drive passenger cars also make them easy to catch fire, especially when the battery inside the battery is damaged or defective < p > Waxman said that the two electrodes of the lithium-ion battery are close together, which increases the possibility of short circuit, and the battery is filled with flammable liquid electrolyte. "This flammable liquid may enter a so-called heat runaway state and begin to boil, leading to a fire," he said < p > electric vehicles include battery management systems to keep the internal high-voltage battery at a safe operating temperature. These systems control the charging and discharging speed of the battery. Improvements to them and to the battery itself will make electric vehicles safer < p > Tesla recently announced that it will switch from lithium-ion battery to lithium iron phosphate (LFP) battery. Other major automakers, including Ford and Volkswagen, are also replacing nickel or cobalt used in some electric vehicles with LFP < p > Paul Christensen, a professor of electrochemistry at the University of Newcastle, said: "it is widely believed that these batteries are much safer." He believes that eventually all electric vehicles will be safer than the gasoline or diesel vehicles they replace < p > Christensen said: "it has taken us a long time to fully understand the risks and hazards of gasoline and diesel vehicles. Now, we must learn faster how to deal with the challenges posed by electric vehicles. We can do it." (small) < / P > < p >