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Electric car spontaneous combustion accident frequency, lithium battery safety attention again

by:Vglory      2020-10-28
Electric car spontaneous combustion accident frequency, lithium battery safety attention again recently, near Beijing sanlitun SOHO spontaneous, a domestic pure electric car and hit a stop at the edge of a buick lacrosse. In recent years, more and more along with the popularity of electric cars, electric car spontaneous combustion accident, lithium battery safety caused attention again! Electric moped, the electric car industry demand for lithium ion batteries are also more and more; In the field of future energy storage, lithium ion battery will puts glorious greatly. But in the lithium ion battery of mankind at the same time, it also has the potential danger, frequent the burning and explosion accident of the lithium ion battery to people's life and property safety brought great threat. At 5 PM on May 31, 2016, 53 points, nantong, jiangsu qidong jiangsu hai sida power supply co. , LTD. , lithium battery fire explosion accident, accident is located in qidong nanyuan west road the company a three layers of lithium battery is full state on the warehouse. Immediately after the fire officers and soldiers rushed to save. At the scene of the disposal, and suddenly exploded. Accident was 12 employees and 8 firefighters were injured. Later, the injured were rushed to the nantong qidong and hospital treatment. However there are still 1 firefighters work and a sea star employees after the rescue invalid death. At present a preliminary investigation of the cause of the accident, because the battery internal short-circuit temperature quickly, at the same time affect the adjacent cells change caused by the explosion. There is on January 1, 2016 the tesla Model S in charge, Beijing, nanjing, hefei, etc to fire electric car spontaneous combustion, shenzhen factory fire, hunan lithium battery trucks highway transportation accidents such as fire. According to the Associated Press, Boeing has warned passenger airlines says bulk transport lithium ion battery may cause a devastating fire. The federal aviation administration said in a statement, the test indicates that transport lithium battery there is a huge risk. Overall, according to the FAA, 1991 - Accidents batteries in 2007, 27% is lithium battery accident, the accident, 68% are caused by internal or external short circuit, 15% are caused by charging or discharging, 7% owing to an unexpected start equipment, 10% for other reasons. Lithium battery once combustion condition, only after it is depleted, combustion can be extinguished, and equipped with the HALON fire extinguishing agent 1301 on board the aircraft to prevent thermal runaway lithium-ion batteries has no effect at all, such a lithium battery air transport security risk is more outstanding. Lithium battery although volume is small, it has a high energy, at the same time the electrolyte containing combustible. This if application of good energy is the energy efficient, will produce a lot of bad on the application of heat and combustion, formation of disasters. A capacitor is 2 - 3 ah lithium cobalt ion battery of the electrical energy is the 25-18650 KJ 40, and the heat generated by the chemical reaction after it can reach 280 KJ. That is to say, lithium ion battery in case of thermal runaway, the heat is very big, so it has a very big harm. You can see the appearance of the lithium battery after thermal runaway. Researchers experiments show that due to the lithium battery internal temperature, internal thermal runaway reaction, produce the positive leak gas making lithium battery, forming a small orange flame torch; At the same time inside the battery electrolyte began to spew out and burn, quickly form a strong flame; Is desperately to produce large amounts of Mars and white after a crackling sound, release a large amount of gas and severe burns. This kind of phenomenon in a few seconds faster and explosive reaction, produce loud noises. Lithium battery burns the highest temperature can reach 700 degrees, the degree of combustion reaction. So we use lithium battery need to pay attention to what problem? Don't over charge and discharge. Over charge and discharge can cause a lot of damage to the lithium battery, also is likely to make the battery internal temperature rise, cause combustion. Don't let the high temperature lithium battery contact. The influence of the temperature for the battery life is very big. The lower the temperature, the higher the lithium battery life, with the experimental results show that, when more than 70 degrees, spontaneous exothermic reaction will occur within the battery pool, makes the temperature rise sharply. In more than 130 degrees lithium-ion batteries will produce gas reaction, makes the internal pressure is too large, 'open' batteries and burning explosion. Lithium-ion batteries, electric lithium battery manufacturer, the product by the supervision and inspection institute of guangdong province, through international CE certification, the national group by China ping an insurance company, a two-year warranty, the first in the New Year. For details, please consult the online customer service, or call, the free phone service.
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