New energy vehicles cause most fire pointing in the direction of power battery

On April 23, weibo emerge on a garage a well-known brands of electric vehicles and spontaneous combustion fire video. According to the report, in February, Florida, USA, a the brand electric car hit a tree and burst into flames, dragged to the police in the parking lot, after three times still spontaneous combustion.

according to incomplete statistics, the national 2018 electric vehicles on fire incident has more than 40, vehicle covering different models such as passenger cars, buses, logistics car.

　　“ Most of the fire is in the process of charging, or just after charging. Safety guarantee power battery charging is a troublesome thing, there are many influence factors, will be many hidden dangers in the process of charge amplifier, lead to accidents. ” North China institute of vehicle power battery lab director zi-dong wang said.

the relevant industry experts told reporters, the science and technology daily electric cars cause most of the fire to power battery, both the quality problem of the battery itself, there are also problems of materials properties. Lithium battery once caught fire, the fire spread very quickly, intense combustion temperature may reach 600 ℃ & ndash; 1000 ℃, and at the same time release large amounts of toxic gases.

the most used high energy density batteries mainly ternary lithium batteries and batteries, lithium iron phosphate ternary lithium batteries at about 200 ℃ will decompose, and release oxygen, burning more intense. The ternary lithium battery was once included in the application of new energy bus recommended directory is prohibited. Is due to the ternary lithium battery is not in conformity with the electric bus related national standards, the market is not applied to the field of new energy bus.

however, in the way of the pursuit of high energy density, lithium titanate battery with high safety performance was once neglected because of the low energy density.

professional institutions of lithium titanate battery test found that in the harsh conditions, such as acupuncture, extrusion, short circuit test, lithium titanate battery still don't smoke, no fire, no explosion; In 20 ℃ & plusmn; 5 ℃ condition, the monomer lithium titanate battery aside after 1 hour, then placed in the fire burning, 50 minutes after the reaction began to appear.

　　“ And the bus as a fixed station, fixed range of operating vehicles, does not need very long range. Lithium titanate battery 6 minutes filling this advantage, fast charge, does not affect the efficiency of bus. ” The relevant person in charge of silver long new energy said.

experts stressed that the research and development and production of the products should be based on rational judgment of the market, based on the application of new materials and innovative technology, based on the consideration of people life and property safety.

　　“ Miit will speed up the implementation of the new energy automotive safety mandatory national standards, strengthen the supervision of the safety of the new energy automotive industry. ” Deputy director general of the Ministry of Industry and Information Technology equipment industry division jun-jie luo said.