12v 18650 battery pack

　　The world's first car-grade power high-speed laminated 12v 18650 battery pack development white paper released

　　After more than ten years of rapid development, power lithium batteries have now reached a crossroads. On the one hand, new energy vehicles have a huge demand for power lithium batteries; on the other hand, power lithium batteries are facing the decline of subsidies and the cancellation of the "white list" , frequent safety accidents and a series of challenges, the power 12v 18650 battery pack industry chain urgently needs to form closer cooperation.

　　On July 10, the "First China International Electric Vehicle Safety Technology Innovation Conference" with the theme of "Breakthrough? Transforming the Safety of Electric Vehicle Development" was held in Baoding, Hebei.

　　At the meeting, Liu Yanlong, Secretary General of China Chemical and Physical Power Supply Industry Association, Yu Qingjiao, Secretary General of Zhongguancun New 12v 18650 battery pack Technology Innovation Alliance, Mo Ke, founder of True Lithium Research, Yang Hongxin, General Manager of Honeycomb Energy, Rao Zhongru, Deputy General Manager, Jin Zhengxian, Process Equipment Director, etc. jointly released the "White Paper on the Development of China's Automotive Grade Power High-speed Laminated Batteries". This is the world's first white paper on laminated 12v 18650 battery pack applications, which comprehensively sorts out the development history and technical characteristics of power batteries, and points out the future development of automotive grade power batteries. The approach to safety will help promote a new round of innovation in power 12v 18650 battery pack process technology.

　　The world's first laminated 12v 18650 battery pack application white paper is released

　　The development of power lithium batteries in our country started in the 21st century. The 50 lithium-ion 12v 18650 battery pack buses used in the 2008 Beijing Olympics set a precedent for the industrialization of lithium-ion batteries.

　　After more than ten years of rapid development, power lithium batteries have now reached a crossroads. On the one hand, new energy vehicles have a huge demand for power lithium batteries; on the other hand, power lithium batteries are facing the decline of subsidies and the cancellation of the "white list" , frequent safety accidents and a series of challenges, the power 12v 18650 battery pack industry chain urgently needs to form closer cooperation.

　　In order to further implement the innovation-driven development strategy and accelerate the high-quality development of the lithium 12v 18650 battery pack industry, relevant institutions of industry, academia and research in the power 12v 18650 battery pack industry jointly launched the world's first white paper on the application of laminated batteries - "White Paper on the Development of China's Automotive Grade Power High-speed laminated batteries".

　　This white paper comprehensively summarizes the development status of global lithium 12v 18650 battery pack production technology, from the development of lithium-ion 12v 18650 battery pack production equipment, the process differences and quality control of winding and lamination, the development path of technology and equipment in the lamination era, the performance advantages and performance advantages of batteries in the lamination era. Several sections such as safety improvement introduce the latest progress and future trends of high-speed lamination technology.

　　In the current industrial context, the release of this white paper, on the one hand, points out to the industry that the stacking era is the only way to revolutionize power 12v 18650 battery pack technology by reviewing the evolution of lithium 12v 18650 battery pack technology vertically; on the other hand, it makes a horizontal comparison between laminating technology and winding The differences in processes put forward the safety, endurance, life, size, capacity, price and other conditions that automotive grade batteries need to meet, thus providing clear standard guidance for manufacturing process innovation for all parties in the 12v 18650 battery pack industry chain.

　　What did we read in the lamination process white paper?

　　In recent years, energy storage white papers, power 12v 18650 battery pack white papers, etc. have been released in the power 12v 18650 battery pack industry. What is different about this high-speed lamination process white paper? What step has the technological progress of the lamination process taken now?

　　In this "White Paper on the Development of China's Automotive Grade Power High-speed Laminated Batteries", we can see the following differences.

　　1. Division of three stages of lithium-ion 12v 18650 battery pack development

　　The white paper spends a lot of space to comprehensively sort out the lithium 12v 18650 battery pack from the 1.0 era of 3C-level applications, to the 2.0 era of general power applications, and now to the 3.0 era of automotive-level power applications, and the corresponding 12v 18650 battery pack cells at each stage. morphological changes and the manufacturing processes of mainstream manufacturers.

　　The first two stages are mainly based on the winding process. In the 12v 18650 battery pack 3.0 era, the design of new energy vehicle 12v 18650 battery pack packs is developing in the direction of longer length, and the height direction is unified at about 100mm. Therefore, the cells produced by the lamination process will Be widely used.

　　2. Process differences and quality control of winding and lamination

　　The biggest process difference between square laminated batteries and coiled batteries lies in the three major processes of slitting, die-cutting and pole assembly forming. The processing methods of other processes are the same. The biggest difference lies in the different pole assembly forming methods.

　　First of all, the positive and negative electrode sheets in the winding process are continuous, and the positive and negative electrode sheets in the lamination process are in the form of sheets; secondly, in the winding process, when the mark hole on the pole piece is detected, it is cut at the mark hole position to complete a pole set. The laminated 12v 18650 battery pack cells are laminated according to the set number of positive and negative electrode sheets. When the number reaches the set value, the lamination of one 12v 18650 battery pack cell is completed; finally, there are differences in the shape of the formed electrode groups. For pole groups using winding technology, when the number of layers is the same, the number of tabs is twice as much as that of laminated batteries. In terms of quality control, burr and dust control requirements for laminated batteries are higher.

　　3. Development and performance advantages of processes and equipment in the stacking era

　　The white paper introduces the current three directions of lamination equipment: ① high-speed lamination equipment route; ② cutting and stacking integrated machine; ③ thermal lamination high-speed lamination equipment. The first technology has high flexibility and feasibility and is in the development stage; The second type is due to differences in the efficiency matching between die-cutting machines and lamination machines, and is not yet mature for application; the third type is due to the patent protection of the thermal composite lamination process, which limits the promotion and application in the industry.

　　Honeycomb Energy adopts the square aluminum shell lamination process, chooses the industry-leading high-speed lamination route for equipment technology, and hires senior domestic and foreign lamination equipment and process experts to achieve technological achievements in the field of high-speed lamination. The stacked era 12v 18650 battery pack not only has more High energy density and more stable internal structure also have higher safety and longer cycle life.

　　For safety, refresh the car-grade power 12v 18650 battery pack standards

　　According to incomplete statistics, since April 2019, there have been at least 6 fire incidents involving new energy vehicles. Although the causes of the fires are different, some are charging, some are undergoing maintenance, and some spontaneously ignite while sitting still... …The series of accidents have not only caused people to worry about the safety of electric vehicles, but also had a negative impact on the development of the industry.

　　In this regard, Wan Gang, vice chairman of the National Committee of the Chinese People's Political Consultative Conference and chairman of the China Association for Science and Technology, pointed out: "In the face of the superposition of various new safety problems, it is necessary to formulate new technical standards and safety standards, especially to establish system-wide solutions. At the same time, further improve Product quality, improve consistency and reliability in the design, manufacturing, assembly and other aspects of power batteries."

　　The release of the "China Automotive Grade Power High-speed Laminated 12v 18650 battery pack Development White Paper" provides solutions on how to build safe and reliable automotive grade power batteries, and proposes power lithium 12v 18650 battery pack standards that ensure safety from the selection of technical paths. From the joint release of this white paper, we saw a joint appeal from industry, academia and research parties.

　　The conference brought together Xu Yanhua, deputy secretary-general of the China Automobile Association, Fu Bingfeng, executive vice president and secretary-general of the China Automobile Association, Billy Xu, representative of SAE International, Yang Yusheng, an academician of the Chinese Academy of Sciences, Liu Yanlong, secretary-general of the China Chemical and Physical Power Supply Industry Association, China Dynamics Deputy Secretary-General of the 12v 18650 battery pack Innovation Alliance & Deputy Secretary-General of the China Electric Vehicle Charging Infrastructure Charging Alliance Wang Zidong, founder of True Lithium Research Mo Ke, Director of the State Key Laboratory of Safety and Energy Conservation at Tsinghua University Professor Lu Languang, China New Energy Materials Technology Research Institute Professor Chang Wang Qingsheng and many other industry experts have worked together to improve the safety and quality of global electric vehicles.

　　As the core component of electric vehicles, power batteries are not only related to the competitiveness of OEM electric vehicle products, but also closely related to the driving safety of consumers. In this regard, Yang Yusheng, an academician of the Chinese Academy of Engineering, emphasized at the meeting: "It is necessary to use mature and safe products. batteries and develop safe, energy-saving and emission-reducing electric vehicles.”

　　Regarding the next generation of automotive-grade power batteries, Lu Languang, director of the State Key Laboratory of Safety and Energy Conservation at Tsinghua University, said bluntly: "The advantages of the winding process are high production efficiency and controllable inter-layer clamping force. However, due to the curvature radius, especially the winding core The internal center curvature radius is small, resulting in small N/P, uneven charging and discharging stress, inconsistent deformation, and easy lithium precipitation. The lamination process is just the opposite. Each part is evenly stressed and not easy to deform. Lamination is more suitable for deformation. Large electrode materials are helpful to ensure consistent deformation during charge and discharge cycles and avoid problems such as lithium precipitation."

　　Power 12v 18650 battery pack safety is not just talk. The world's first lamination process application white paper was released at the first China International Electric Vehicle Safety Technology Innovation Conference, marking the first step for Chinese companies to take the first step in the safety of power lithium 12v 18650 battery pack system solutions. Let the world realize the safety and reliability of high-speed lamination, enhance trust in square lamination batteries, and then promote the industry to stride forward in a more stable "stacking era".

　　It is understood that new and old forces in the lithium 12v 18650 battery pack industry such as CATL, Panasonic, Samsung SDI, Funeng Technology, Wanxiang A123, and Micromacro Power have plans to introduce lamination technology after 2022. The new power 12v 18650 battery pack force Honeycomb Energy has already launched this year On April 10, it took the lead in releasing the first car-grade square stacked 12v 18650 battery pack, entering the "stack era" three years ahead of the world's mainstream manufacturers.

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