Power lithium battery cracked mileage anxiety -Lithium - Ion Battery Equipment

Power lithium battery cracked mileage anxiety -Lithium - Ion Battery Equipment

Statistics released recently by the Quality Development Bureau of the State Administration of Market Supervision and Administration show that as of October this year, more than 40 new energy vehicle fires have occurred in China, including BYD Song, Lifan 650EV, Zotyun 100, etc.

Tesla, who stands at the center of automobile public opinion, is not immune. Various spontaneous combustion incidents are reported from time to time. In addition to the recent frequent safety incidents, the driving range of electric vehicles in winter will also be shortened, which once again arouses consumers' anxiety about the safety and mileage of new energy vehicles.

The concept of safety first and mileage second is beyond doubt

After incomplete statistics on more than 80 electric vehicle fire accidents since 2011, Wang Fang, the chief expert in the field of power battery of China Automotive Technology Research Center, believes that fire accidents in the charging process account for a large proportion, mainly due to mechanical damage such as vehicle body fracture, battery thermal runaway, and water immersion.

From November 8 to 9, the "Lithium Vision" 2018 Third International Summit on Power Battery Applications was held in Beijing, where many industry experts and business people faced problems and discussed the development of electric vehicles and power batteries.

In the first three quarters of 2018, China's total output of new energy vehicles reached 667000, up 70% year on year, leading the world. Driven by the new energy automobile industry, China's power battery industry has maintained a rapid and stable growth trend, the overall market competitiveness has gradually increased, and the cultivation of leading enterprises has been carried out in an orderly manner.

"Safety is the cornerstone of the development of the new energy vehicle industry, and we cannot relax our focus on the safety of power batteries." At the meeting, Gao Junhua, deputy director of Beijing Work Department of China Automotive Technology Research Center Co., Ltd., admitted that in the past two years, the new high specific energy battery has improved the driving range of electric vehicles, but also increased the potential safety hazards. In fact, safety should be the first step in improving the power battery energy.(Lithium - Ion Battery Equipment)

"Electric vehicles and power batteries are interdependent, mutually reinforcing and mutually restrictive." Yang Yusheng, an academician of the CAE Member, said frankly that the main contradiction of electric vehicles is safety and mileage. Among them, security is the main aspect of the contradiction, mileage is the secondary aspect, and the two cannot be reversed.

For a long time, the development of electric vehicles in China has been more dependent on national policies and subsidies, with more emphasis on driving range and energy density, resulting in many things being covered up or even ignored. After the subsidy has declined, what can really compete is the comprehensive performance of the product.

"The subsidy standards for new energy vehicles in the past two years are closely related to the energy density of power batteries and the driving range of vehicles." Gao Junhua said that the index requirements for the energy density of power battery products made the product iteration cycle too short, which led some enterprises to pursue energy density blindly and ignored the optimization of the comprehensive performance of products. There were local outstanding quality and unstable overall chain, which made it difficult to lay a foundation for sustainable development.

High risk of simply pursuing battery energy density

The power, economy, safety, reliability and charging convenience of electric vehicles test the use experience. In Yang Yusheng's opinion, there are five major anxieties for long mileage pure electric vehicles, which seem to have something to do with batteries, specifically, mileage anxiety, safety anxiety, charging anxiety, price anxiety and battery anxiety.

"Only the real progress of batteries can promote the improvement of the level of electric vehicles. If the batteries are not mature and a large number of unstable batteries are used in cars, there will be problems." Yang Yusheng stressed that the danger of batteries restricts "the increase of electric vehicle mileage at will".

Deng Zhongyi, president of the Research Institute of Guangdong Mengshi New Energy Technology Co., Ltd., said frankly that at present, most of the power battery industries are struggling or even suffering. Because the industry has a hard target for the energy density of power batteries: if it does not reach 140 watt hours/kg, the car factory will probably not ask for your battery. Only when it reaches this target can you get a subsidy multiplied by a factor of 1.1.



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