Safety is the electric car development must first solve the problem

Source: 2020 - 03 - 23 o hits: safety is most important in the development of electric vehicles with the constant improvement of the energy density, lithium battery safety hidden trouble comes, all kinds of electric cars, fire explosion accident emerge in endlessly. Safety is the first task of the electric car electric car time has come. But unsatisfactory range is still one of the biggest obstacle to rapid expansion in the electric car. In energy conservation and new energy automotive technology roadmap, China established in 2020, power battery energy density reached 300 wh/kg, 2025 400 wh/kg, 2030 reached the target of 500 wh/kg. In the Ministry of Industry and Information Technology of the 'made in China 2025' issued, the goal of further increased to 2025 400 wh/kg, 500 wh/kg in 2030. However, the existing information system and technology can not satisfy people expect of high tolerance range and high energy density. Lithium battery industry is generally believed that the ternary lithium battery technology road maximum range, its specific energy density limit of 350 wh/kg. Countries are betting on high nickel ternary + silicon carbon cathode data, but even if panasonic's 21700 cylindrical battery has reached the aluminum nickel and cobalt than 0. 9:0. 5 abnormal limits, individual cells than can also reach a maximum of 300 wh/kg. With the constant improvement of the energy density, lithium battery safety hidden trouble comes, all kinds of electric cars, fire explosion accident emerge in endlessly. Safety is the first task 1 of electric cars. Frequent event on the evening of April 21, a district in shenzhen in the underground garage, a tesla Model S suddenly and white smoke from the fire. Therefore, on behalf of the global electric car the highest level of tesla had the highest accident rates. According to preliminary statistics, tesla S/X series electric cars worldwide happened nearly 50 close to tesla S/X series electric cars or XiangChao accidents, including burning caused by driving, collision, charging, spontaneous combustion, explosion and other accidents. On behalf of the Chinese electric cars at the highest level ( At least in terms of price) Wei to car is no exception. At noon the next day, April 22, a wei to car ES8 in xian wei to car caught fire when the official authorized service center for repair. Although it does not light the other vehicles, but it burnt down. Wei to car maintenance is in progress. There may be other causes. But tesla without charge, the car without any danger of fuel, the owner and no smoking. According to shenzhen tesla deflagration accident drivers, the 2016 purchase of deflagration tesla, total mileage is just over 60000 yuan, not more than 10 times of maintenance, most of them are tire problem. Tesla, in the world. A brand of electric cars, and still is not enough security, fire, let alone any other carmakers. More frustrating is that after the accident, the owner of the tesla to call the insurance company, but the insurance company refused to pay the claim. The boss said: 'I call the insurance company for the first time. Although with positive, the number of electric vehicle fires, of course, is not as high as the number of spontaneous combustion of fuel vehicles, but from the overall probability, electric cars, the probability of spontaneous combustion is higher than the fuel cars now. It is worth noting that tesla and wei to the car on the use of power battery have one thing in common, both chose the high range of ternary lithium battery. At that time, most brands of electric vehicles are show that the spontaneous combustion, especially using the ternary lithium battery car manufacturers.