Against the background of the advancement of power battery technology and the gradual maturity of the electric vehicle market, in recent years, the market for power batteries has gradually developed from the pursuit of high energy density to the pursuit of high safety, low cost, and recyclability. Power battery safety is the first priority for revolutionary breakthroughs in battery technology and the first key to improving the performance of electric vehicles.

　　How to control costs and achieve economies of scale while ensuring safety is the focus of competition among power battery companies around the world in the next stage. Power battery recycling is not only a need to solve environmental pollution problems, but is also considered the next step in the field of power batteries. In the blue ocean of staged investment, as the recycling market gradually matures, power battery recycling will be an important business direction for enterprises to reduce costs and increase profits.

　　In order to promote the healthy and efficient development of the industry, on June 23, the "China (Qinghai) Lithium Industry and Power Battery International Summit Forum" was hosted by the Qinghai Provincial People's Government, the Ministry of Industry and Information Technology, the Ministry of Science and Technology, and the China Electric Vehicles Association of 100. Held in Xining City, Qinghai Province.

　　Top experts, scholars and entrepreneurs from the lithium battery industry at home and abroad gathered together to conduct extensive and in-depth discussions on "supporting the healthy development of electric vehicles with highly safe, low-cost, recyclable batteries" and discussed how to ensure power in the next stage. The safety of the battery throughout its life cycle, how power battery companies can gain cost competitiveness and how to build a mature power battery recycling system.

　　Wang Liming, deputy governor of the People's Government of Qinghai Province, said in his speech that Qinghai is blessed with salt lake lithium resources. The proven lithium resource reserves account for more than one-third of global reserves and more than 80% of national reserves. In recent years, Come to Qinghai Province to focus on building a 100 billion lithium battery industry, and initially build a relatively complete industrial system from salt lake resources - lithium carbonate positive and negative electrode materials - lithium battery components - energy storage and power batteries and supporting equipment. The lithium battery industry has become Qinghai's strategic The new growth pole of emerging industries has become a beautiful business card for Qinghai’s green, low-carbon and circular development.

　　The global lithium battery industry and companies are developing rapidly in terms of lithium battery material technology and manufacturing technology. How to improve the development level of the lithium battery industry more efficiently and achieve leapfrog development has become an important issue that restricts the faster and better development of the lithium battery industry.

　　Ouyang Minggao, academician of the Chinese Academy of Sciences and vice chairman of the China Electric Vehicles Association of 100, gave a keynote speech and introduced the research progress of power battery safety prevention and control. He said that current safety accidents are a fatal hazard for the development of new energy vehicles, and thermal runaway of power batteries is the essence of safety accidents for new energy vehicles.

　　Through in-depth research on the thermal-mechanical-electrical coupling mechanism of thermal runaway in power batteries, it was found that the three processes of thermal runaway inducement, occurrence and spread are: lithium deposition during battery charging, internal short circuit in the battery, single cell thermal runaway and battery system thermal runaway. Spread is the root cause of safety problems, and methods such as fast charging control, battery management, thermal design and thermal management are used to achieve active safety prevention and control of thermal runaway of power batteries.

　　In the future, the energy density of lithium-ion batteries will continue to increase, and the requirements for battery safety prevention and control technology will become higher and higher. The industry should focus on solving the safety issues of lithium-ion batteries and develop safer power batteries to ensure the smooth development of the electric vehicle industry. .

　　Zhang Yongwei, secretary-general and chief expert of the China Electric Vehicles Association of 100, released a topic report "Making Power Batteries Flow: Full Life Cycle Asset Operation Management of Power Batteries". He pointed out that the electrification of vehicles with power batteries as the core component has spawned a variety of industrial ecology. The full life cycle asset operation management of power batteries is crucial to the construction of new models and circular economic systems.

　　Monitoring, evaluation, utilization, regeneration and innovative financial models are the keys to improving its full life cycle system. my country's power battery operation system has been initially established and is in a leading position globally. However, all aspects of the entire life cycle are still faced with policies, standards, industries, markets, etc., and they need to be accelerated and improved in all aspects of government, industry, academia and research.

　　He said that the project report is a phased research result, and the industry is still in the development and improvement stage. The Committee of 100 will continue to track and revise the research content according to the changing situation of the industry.

　　Kenan Sahin, professor at the Massachusetts Institute of Technology and president of CamxPower, gave a keynote speech on "Using highly safe, low-cost, recyclable batteries to support the healthy development of electric vehicles." He pointed out that low-cost batteries are the key to the sustainable growth of electric vehicles and ensure the The safety of automobiles requires the integration of multiple disciplines and technologies at multiple levels such as materials and systems. Considering the maintenance, multi-level utilization and recycling of power batteries from the full life cycle is an important way to realize their economic value.

　　Zeng Mu, executive vice president of Dekai Group and president of East and South Asia, gave a speech on the theme of "Creating Power Battery Technology Innovation with Safety". He introduced the background of the development of electric vehicles, the importance of safety and measures to ensure safety. He said that consumers' interest in electric vehicles is growing, and ensuring the safety of electric vehicles is one of the focuses of consumers' attention. The safety of electric vehicles and power batteries must not only focus on the design level, but also pay attention to the role of testing and verification in ensuring safety. .

　　Wang Nianju, executive vice president of Tianjin Lishen Battery Co., Ltd., delivered a speech on the "Future Development Direction of Electric Vehicle Batteries." He believed that for at least the next 10 years, lithium-ion batteries will still be the main solution for electric vehicle power. In addition to energy density, high safety of batteries must be ensured in the design and manufacturing process. Recycling of decommissioned batteries is also an urgent demand of the market and policy.

　　Yuan Zhongzhi, Vice President and Chief Technology Officer of Huizhou Yiwei Lithium Energy Co., Ltd., delivered a speech on "Lamination technology is an important development direction of power batteries." He said that the lamination method is undergoing revolutionary changes, and it will be a key factor in current and next-generation power batteries. Under the technology roadmap, a new generation of lamination technology that perfectly combines uniform thermal and electrical conductivity, high production speed, and low cost will be the key development direction.

　　Kong Qingxi, deputy general manager of Tower Energy Co., Ltd., delivered a speech on "Recycling and Utilization of Retired Power Batteries". He believed that lithium batteries have advantages over traditional lead-acid batteries in terms of energy density, cycle life and environmental protection. With the launch of power batteries in 2019 The amount of decommissioning is growing explosively. Reasonable tiered utilization is the key to solving the worries about the development of new energy vehicles. It is also an important means to solve the high cost of new energy vehicles. However, small-capacity, distributed base station power backup is not only safe but also economical. In terms of performance, they are the best scenarios for the cascade utilization of power batteries.

　　After the high-level forum, the meeting also arranged a roundtable discussion, chaired by Huang Xuejie, a researcher at the Institute of Physics of the Chinese Academy of Sciences, Yang Xulai, chairman of Hefei Guoxuan High-tech Materials Co., Ltd., Li Yunfeng, chairman of Duofuo New Energy Technology Co., Ltd. Ma Zhonglong, deputy general manager of Honeycomb Energy Technology Co., Ltd., Yang Rukun, chairman of Shenzhen Jiyang Intelligent Technology Co., Ltd., and Zhao Xiaoyong, managing director of Beijing Saidemei Resource Recycling Research Institute Co., Ltd., gave introductory speeches.

　　Regarding the development direction of my country's power battery enterprises, analysis of the full life cycle cost of power batteries, power battery safety issues, forward-looking battery material system technology routes, core technologies and principles of echelon utilization, new resource recycling technologies and industry dilemmas, and intelligent upgrading of production equipment He gave a speech on the path and other contents, and put forward relevant suggestions on the research and development, production, recycling and other aspects of power batteries.

　　During the free discussion session, the guests had a heated discussion and expressed their views on how to improve the safety of power batteries throughout their life cycle, reduce battery and vehicle costs, and build a monitoring, evaluation, and step-by-step recycling system.

　　Zhang Yongwei, secretary-general and chief expert of the China Electric Vehicles Association of 100, said that power batteries play an important role in the diversified technology development stage of new energy vehicles and are also the key to being cost-comparable with traditional fuel vehicles. Whether power batteries can achieve comprehensive benefits is not only related to technological innovation, but also perfect policies and standards are crucial. In the development process, it is necessary to build a comprehensive innovation and security system to promote the healthy and rapid development of new energy vehicles and power battery industries.

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