What is the reason why the new energy car spare? Dynamic lithium batteries accounted for 31%

　　Author ：Iflowpower – Portable Power Station Supplier

According to incomplete statistics, since 2018, the problem of spontaneous combustion or explosion of new energy vehicles has occurred. This makes the whole society's safety issues in electric vehicles in high temperature environments, and the battery stability has been further step by step. What is the cause of such an event? Recently, the Economic Daily reporter interviewed the professor of Peking University, and the Chairman of the "Davos" academic committee.

In order to ensure the safety operation of all electric buses in the Beijing Olympic Games in 2008, the Ru team has conducted research that electric vehicle safety is not only decided by the battery, and the ion battery material is not very important. In the view of it, in the cause of the fire accident, the self-ion resistance ratio of the dynamic lithium-ion battery is 31%, and it is important because the lithium-ion battery material is improperly selected and the quality of the battery itself. "When charging, the lithium-ion battery that is poor conductivity is prone to a lot of heat, and the temperature is rapid, resulting in thermal out of control.

". According to the statistics of new energy vehicles since 2017, charging places are high-increasing land, accounting for 50%. There is a large amount of flammable substances, such as non-aqueous liquid electrolytes, such as non-water-soluble liquid electrolytes, will burn when its temperature is exposed to the air reaches 60 ¡ã C to 70 ¡ã C.

Its Lu said that inquiry the cause of electric vehicles, do not attribute to lithium-ion batteries. Compared with the fuel truck, it is more flaw than the fuel, and the combustion explosion occurs is more terrible. However, the probability of self-igniting or explosion accidents every year is very low.

In recent years, electric vehicles with high energy density and strong endurance have been concerned, and some batteries that have high densities have begun to apply. However, the material of these lithium-ion batteries is more likely to heat during charge and discharge, and as the energy density is constantly increasing, the chance of thermal out-of-control has also shown greatly. At the same time, the car collision will cause the battery pack to deform, resulting in a battery diaphragm to tear and occurs internal short circuits, and it is easy to cause a fire caused by a flammable electrolyte.

"The design of electric vehicles is always the core of the problem.". "Oh, Lu said, because during driving or charging, the battery will occur.

However, there is no good way to quickly heat up the lithium ion battery. Therefore, accelerate the development of lithium-ion battery core materials and battery technology. To completely solve the safety problem of future electric vehicles, it is not just a problem of battery.

Its Lu believes that in the near future, electric vehicles should be developed, solve safety problems, and use the hydrogen-fuel power lithium battery and lithium-ion batteries, it may have a very important use. "I have always encouraged to promote the use of methanol fuel power lithium batteries and have launched more than 10 years of research. The working principle of methanol fuel is the same as the hydrogen fuel, but does not low temperature, high pressure, it can be combined with the lithium ion battery, in the technical aspects, mixing power or increased range power, will be expected to quickly promote the development of electric vehicles.