In December 2023, the Ministry of Industry and Information Technology, the Ministry of Finance, and the State Administration of Taxation jointly issued the "Announcement on Adjusting the Technical Requirements for New Energy Vehicle Products Subject to Reduction and Exemption of Vehicle Purchase Tax". The announcement made a series of adjustments and improvements to the new energy vehicles that will enjoy the policy of reducing or exempting vehicle purchase tax after 2024 from a technical perspective. It clearly stipulated that the "low-temperature mileage attenuation rate shall not exceed 35%" and will be fully implemented from June 1, 2024.
However, the results of a new energy vehicle winter test project recently held by a certain automotive media show that the range achievement rate of most models is below 50%, which is a considerable gap from the new regulations. Faced with the current situation of this industry, on January 23, 2024, Changneng Technology and Gaishi Automobile jointly held a "Seminar on Anti Attenuation and Innovative Technology of Power Batteries" in Zhangjiagang.
At the meeting, nearly 60 representatives from automotive companies, power batteries, thermal management, simulation testing and other enterprises gathered together with leaders and partners of Changneng Technology to have in-depth discussions and exchanges on the current development status and trends of the automotive power battery industry, the development and innovation of power batteries under the new indicators of low-temperature mileage attenuation in 2024, and the sustainable development of power batteries.
In the opening speech, Gu Renfa, Chairman of Changshun Group, stated that under the national "3060" dual carbon target, the development speed of new energy vehicles is very fast, but there are also many pain points, especially the problem of low-temperature endurance in winter. As a company dedicated to the research and development of basic materials, Changshun Group hopes to inspire the industry through this conference and also contribute to alleviating the severe low-temperature range degradation of new energy vehicles.
In her speech, Zhou Xiaoying, CEO of GAC Motor, pointed out that the continuous development and iteration of technology, combined with the use of scenarios, is endless. Currently, although battery technology and charging and swapping technology are developing rapidly, there are enterprises like Changshun Group that silently strive and continuously improve in any technology field that can increase vehicle range. I believe many of the automotive industry partners who are attending today want to do this thing better, strive for perfection, not only meet regulatory requirements, but more importantly, bring consumers a more convenient and comfortable travel experience with new energy vehicles. We look forward to working together with everyone to help promote the development of the industry.
Mi Haowen, Director of the Science and Technology Talent Bureau of Zhangjiagang Free Trade Zone, pointed out that enterprises are the main body of technological innovation, and the breakthrough of Changneng's anti attenuation materials in winter battery use is based on long-term innovation. The format of this conference is very good, like an innovation consortium, which includes material companies, host factories, and battery manufacturing companies. I believe that through the efforts of the innovation consortium and all parties, electric vehicles will definitely go further
Recognize the present and judge the future. In the subsequent keynote speech, Wang Xianbin, Senior Director of Gaishi Automotive Research Institute, delivered a speech on the theme of "Development Status and Trends of Automotive Power Battery Industry". He analyzed that for a long time, issues of charging, safety, mileage, and cost anxiety will still exist. In view of this, the technological trends of future power batteries will focus on breakthroughs in the following directions: first, super fast charging technology, such as CATL's Shenxing Supercharging Battery, Jike Gold Brick Battery, etc; The second is structural innovation, which will become the core development path of the industry before significant breakthroughs are made in materials; The third is the development of new material systems, such as sodium ion batteries, semi-solid state batteries, and all solid state batteries.
Li Bo, Chief Engineer of Energy Storage System in the Drive System Department of Pan Asia Automotive Technology Center, gave a keynote speech on "Technical Analysis of the Ultra Energy Electric Vehicle Platform", which detailed the dismantling of the Ultra Energy electric vehicle platform from three aspects: safety, intelligence, and performance.
The AutoNeng platform is jointly developed by General Motors and Pan Asia Technology Center, and is matched with multiple vehicle models in different regions around the world. As a leading new electric vehicle platform in the industry, the AutoNeng platform meets the strictest ASIL-D safety requirements, equipped with patented thermal safety protection technology and a new battery collision safety architecture, as well as a battery health monitoring system that combines the "vehicle cloud" two ends. The unparalleled safety will solidify users' confidence in electric technology and make travel more reassuring.
Guo Junhua, General Manager of SAIC Times Power Battery System Co., Ltd., shared "Development Trends and Reflections on Power Batteries under New Forms". He pointed out that in terms of material innovation, power batteries are developing towards high nickel direction, and improving battery energy density, safety, and lifespan through silicon doping and lithium supplementation. In addition, solid-state batteries are also a key focus of SAIC Times, which is a clear development direction.
In addition, he emphasized that as the cost of power batteries decreases and technology matures, the connotation of power batteries should not only be used in automobiles, but also widely applied in other fields such as aviation, ships, energy storage, etc. Power battery enterprises should understand the actual needs of the industry more, lay out in advance, and make greater and better contributions to the future development of enterprises.
As the core topic of this seminar, Yuan Huijun, Executive Director of Changneng Research Institute, and Wan Tao, General Manager of Changshun Group Software Business Unit, jointly delivered a keynote speech on "Innovative Solutions for Changneng Power Battery Anti Attenuation". The two introduced the anti attenuation solution for power batteries, as well as the simulation and battery pack test results and application cases of the solution applied to the whole vehicle.
Yuan Huijun pointed out that in the past three years, the sales of new energy vehicles have increased by about 6 times, and the market share has risen from 5.4% to 31.6%. In 2023, the annual sales of new energy vehicles will reach 9.5 million units. Next, how new energy vehicles can achieve stable and far-reaching development, seize more markets, achieve green, low-carbon and healthy development, and solve the problem of low temperature range anxiety in cold northern regions is a pain point that the industry urgently needs to think about and solve
To this end, Changshun Group has established a professional R&D team, which has undergone 3 years of specialized research and development, applied for more than 10 patents, and finally launched the Endurance Defender ™ CSC-8100、 Endurance Guard ™ CSC-8400 solution.
According to Yuan Huijun, the main difference between the two products is the endurance guard ™ The density of CSC-8100 is 0.10g/cm ³, which is relatively lightweight and has low thermal conductivity and high thermal resistance; Endurance Guard ™ The density of CSC-8400 is 0.40g/cm ³, which has both thermal resistance and stone impact resistance. Subsequently, Yuan Huijun also introduced in detail the research and development ideas of Changneng Technology's anti attenuation solution from six dimensions, including flame retardancy, low thermal conductivity, stone impact resistance, aging resistance, construction technology, and cost, allowing the attending guests to have a clearer understanding and knowledge of the product.
Powerful product performance cannot just float on paper, "said Wan Tao, General Manager of Changshun Group's Software Business Unit, who then presented the Range Defender intuitively from simulation analysis, battery pack testing, and vehicle testing data ™ The benefits of coating for the low-temperature endurance of the entire vehicle.
Firstly, the simulation results under 50 different scenarios/working conditions (WLTC, etc.) demonstrate the use of the Range Guard ™ After coating, the battery temperature remains within the range where the vehicle can be started normally at any time after parking in a cold environment for one night; Under WLTC dynamic conditions, energy consumption can be saved by up to 22.9% per 100 kilometers, mileage gain can reach over 60km, and mileage attenuation can be reduced to 25%.
In addition, according to the actual measurement results of authoritative institutions, using WLTC cycle testing, when the remaining battery SOC is 9.5%, the range attenuation at -28 ℃ is as high as 41.5% compared to 25 ℃. By adding a 10mm anti attenuation coating, the range gain reaches 27.8% (about 90.87km).
From this, it can be seen that the endurance guard ™ The coating can significantly improve the low-temperature degradation problem of power batteries under cold winter conditions, increase the range by more than 17%, and help existing pure electric vehicle models meet the requirement of "pure electric passenger vehicle models, with a low-temperature degradation rate not exceeding 35%". And compared with the simulation model data and experimental test data, the error is only within 1.15%, which also proves that the model has high accuracy.
In terms of product application implementation, Wan Tao revealed that it has cooperated with multiple leading host manufacturers to develop the battery life guard ™ Coating is applied to battery packs, including commercial vehicles, non road engineering (special) vehicles, and passenger vehicles.
Subsequently, Colin Bo, the manager of the EV battery sales department at Storage and Financing Testing, shared on the overview of battery testing capabilities and new testing directions. He pointed out that the rapid development of new energy vehicles has also put forward some new requirements for testing institutions and services. Currently, China's testing standards and technologies for new energy vehicles are ahead of overseas car companies, such as battery thermal runaway testing, 800 high-voltage fast charging platform, and testing of battery integration technologies such as CTP and CTC. As a testing institution, it is necessary to keep up with the development of the times and industry changes, and constantly seek new testing solutions.
Finally, in the roundtable discussion session chaired by Wang Xianbin, Senior Director of Gaishi Automotive Research Institute, Zhang Huiping, Chief Engineer of Battery System at Foton New Energy Research Institute, Tao Hong, Chief Engineer of Thermal Management at Shanghai Haili New Energy Technology Co., Ltd., Wan Tao, General Manager of Software Business Unit of Changshun Group, and Yuan Huijun, Executive Director of Changneng Research Institute, took the stage together to explore the theme of "Exploration of Performance Optimization of Power Batteries in Thermal Management Field in Low Temperature Environment". At the same time, they discussed the new opportunities and challenges brought by the research and management strategies of power batteries under new policies and regulations, the future development trend of battery thermal management system technology, the performance challenges and solutions of power batteries in low temperature environments (such as Range Guard) ™ Various opinions were shared on issues such as coating.
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