Explore the methodology of lithium-ion battery performance and safety collaboration

　　Author ：Iflowpower – Portable Power Station Supplier

The continuous occurrence of electric car safety accidents, let the power lithium battery safety have received attention. How to enhance its safety while meeting the continuous improved energy density of the power lithium battery and the continuous new vehicle renewal mileage, and extend the service life is the topic of the global automotive industry. On October 13, the 11th International Electric Automotive New Lithium-Izonic Battery Conference (ABAA11) held in Huzhou, Zhejiang Province, from the world's automotive industry engineers and government departments discussed the development of lithium-ion batteries in the world To explore the innovation and development of lithium-ion batteries in the car.

Energy density and security must take care of the current, power lithium batteries face great security challenges in use, which requires us to strengthen the improvement of battery safety research and technology. As the academician of the Chinese Academy of Sciences, Ouyang Minggao, a professor of Tsinghua University, and the power lithium battery safety issues in electric vehicle applications sounded the alarm to the industry, requiring the industry to enhance the technical level and safety performance. Ye Shengji, deputy secretary-general of my country Automobile Industry Association, pointed out that the lithium-ion battery as one of the core components of new energy vehicles.

The problem to consider at this stage is how to ensure the safety of consumers, continue to be charged. Demand for mileage, cycle life, etc. In my country, there is a clear requirement of all aspects of the dynamic lithium battery.

For energy density and cost, specific numerical indicators are proposed. Energy density and security are the goals that must be taken into the process of dynamic lithium battery development, which is also a topic in front of the global power lithium battery practitioners. Ye Yaji said.

Lithium-ion batteries can overflow lithium solutions, heat, and the battery can have safety accidents such as explosion or combustion once overheating. However, the vehicle battery pursues high-energy density to improve the mileage of the industry, how is energy density and security? This will continue to improve technology and create innovative research and development. Academician of the Chinese Academy of Sciences, Sun Shi, Professor Xiamen University, said in an interview with "my country Automobile News" reporter.

In fact, the current automotive industries are trying to improve the level of technology to protect the safety of electric vehicles. Ouyang Ming high introduction, they are strengthening the management of thermal lithium batteries by researching diaphragm technology. On this basis, the safety performance of power lithium batteries is improved.

Atsushiohma, relevant person in charge of Nissan Group, also introduced, Nissan's use of adhesives Improve the stability of the battery; Andresshintennach, the relevant person in charge of the Mercedes-Benz Group, said they are studying the carbon layer with olivine material, and the purpose is to improve the battery performance and achieve the stability of the structure. However, the chemical structure of this material is more complex, and new difficulties may occur in practical use. Under the premise of ensuring safety performance, improve the energy density of the battery, cycle life, and reduce costs are the perseverse research direction of the global dynamic lithium battery industry, and the focus of this Abai meeting discussion.

In order to achieve the above objectives, the various auto industry continues to innovate research methods, material technology, management ideas, hoping to improve the performance of lithium-ion batteries in the world, better meet market demand. Fast charging is the industry consistent goal to make electric vehicles to quickly refuel the same, fast charging is the prerequisite for electric vehicles, and the consistent goals of vehicle enterprises and related management departments. On-site, almost all car companies mentioned the topic of fast charging, including BMW, General, Nissan, Mercedes-Benz, public, etc.

Also became the general requirements of the industry to the industry. The relevant person in charge of Ford said that it hopes to achieve a chargeable target for 15 minutes not less than 300 miles (482.8 km) by more than 800 volts.

Davehowell, US Department of Energy, said that charging time is controlled in 10 to 15 minutes is the universal requirements of consumers. In the R & D project led by the US Department of Energy, it is an important research direction without affecting the life of the battery itself. Tesla's super charging pile, you can achieve a charging speed of 200 miles (321.

8 km), we hope to be faster, 15 minutes or even 15 minutes, this is the direction of our efforts. Similarly, the fast charge target proposed by the US Department of Energy is also the level hoped by my country, Japan, Germany and other government management departments. In fact, fast charging will break the life of lithium-ion batteries, the current technical level and material structure can not solve the contradiction between rapid charging and battery life.

Academician of my country, Professor Wu Feng, a professor of Beijing University of Science and Technology, pointed out that the current characteristics of the current lithium-ion battery performance and material structure have determined that the fast charge is not preventive to the battery life, which is the chemical characteristics, it is an objective existence. Industry should continue to conduct scientific research innovations, develop new materials and structures to meet the needs of lithium-ion battery fast charge. We must upgrade the power density of the charging pile to ensure the safety of the high current fast charge.

Wu Feng said. Ouyang Minggang also pointed out that electric vehicles have good development prospects in my country, and it is expected that the future guarantee will exceed 8 million to 10 million. However, in the process of electric vehicle insurance increase, it is necessary to solve the convenience of product use.

How to solve this problem? He believes that in the future, electric vehicles will enter the development stage of charging network combined with the Internet to enhance charging convenience. Davehowell further emphasizes that while improving battery performance, it is necessary to continuously reduce battery costs. In the past 20 years, battery costs have been largely reduced, and there is still a need to further reduce battery costs in the future, and it is desirable that the cost of the positive and negative electrode material can be reduced by 5%, even more.

In this regard, researchers are actively promoting the improvement or replacement of materials, such as trying to use titanium alloy, aluminum nickel alloy. Cobalt has a high cost, we can consider adding nickel materials in lithium-ion batteries, replacing cobalt or reduced cobalt usage, while ensuring the performance of the power lithium battery while reducing cost. Sun Shigang said.

Strengthening exchanges and cooperation and promoting the development of the driving lithium battery industry in China, my country's dynamic lithium battery industry has facing the overall output of excess production, high quality production has become trend, and will face a new round of shuffling. Wu Feng emphasized how to start from basic research, system solving high-performance, safety, long life, low cost problems such as dynamic lithium-ion batteries, is an urgent task in the power lithium battery industry. Specifically, in the high-grade energy high-nickel-lithium ion battery system, is a liquid flame retardant electrolyte or a solid electrolyte to solve its safety problems? In the multi-electronic system, it is a technical route that takes lithium sulfur.

Break through the technical bottleneck to increase the volume ratio energy, or use a lithium positive material, break through the technical bottleneck of long cycle life? Can the material system achieve cobalt-freeization to significantly reduce battery costs? How does the power lithium battery system establish a security threshold boundary to implement a safe state quantitative description and control? Does the production process of the power lithium-ion battery will change the disruptibility? Waste dynamic lithium-ion batteries have green recycling and regenerative technology? These problems have we demonstrate our extensive in-depth academic and technical exchanges. The power lithium battery is the core component of the new energy vehicle. It is a major breakthrough in the heart of electric vehicles, the rapid development of new energy automotive industries.

This should be exchanged and cooperative by international peers to exchange and cooperate with the premise of protection of intellectual property. Green development and innovation development is the general economic and industrial development direction, the general pursuit of the world, and the new energy automotive industry and technology will be perfectly integrated. We co-explored the frontier technology and market applications of the power lithium battery, which will will help the breakthrough development of the power lithium battery.

Zhou Guo. He also introduced that Huzhou relying on the industrial foundation of local power lithium batteries, actively promoting the permanent settlement of the Abai meeting, with the help of the international exchange platform and the continuous in-depth of international exchange, and promoted the development of local and even the new energy auto industry in Zhejiang. To achieve the development goal of the dynamic lithium battery, we must jointly support and help at home and abroad, overcome the difficulties encountered in the process of technological progress; to build the communication platform of collaborative development, strengthen international cooperation coordination and talent training, play industry guidance and Standardized use, accelerate industry development.

Wu Feng also pointed out that the Abai meeting built a platform for exchange cooperation, hoping to collide with the ideological collision between the scholars, further stimulating the vitality of lithium-e-electric research and the potential of related industries, and continuously identify new problems, new gaps, proposing new Thoughts, new methods, discuss new countermeasures. .