|
The journal Automotive Innovation is sponsored by China SAE, published through Springer, distributed around the world, and reflects the top-level research and technical advance of automotive engineering. Automotive Innovation newsletter in August includes the following contents： 1. Article Recommendation——Three papers on Electric Vehicles and Batteries 2. China SAE News: · SAECCE 2023 to be held on October 25-27 in Beijing |
  
|
A Model-Based Battery Charging Optimization Framework for Proper Trade-offs Between Time and Degradation Sean Appleton & Abbas Fotouhi |
||
| This study aims at developing an optimization framework for electric vehicle charging by considering different trade-offs between battery degradation and charging time. For the first time, the application of practical limitations on charging and cooling power is considered along with more detailed health models. Lithium iron phosphate battery is used as a case study to demonstrate the effectiveness of the proposed optimization framework. A coupled electro-thermal equivalent circuit model is used along with two battery health models to mathematically obtain optimal charging current profiles by considering stress factors of state-of-charge, charging rate, temperature and time. The optimization results demonstrate an improvement over the benchmark constant current–constant voltage (CCCV) charging protocol when considering both the charging time and battery health. A main difference between the optimal and the CCCV charging protocols is found to be an additional ability to apply constraints and adapt to initial conditions in the proposed optimal charging protocol. In a case study, for example, the ‘optimal time’ charging is found to take 12 min while the ‘optimal health’ charging profile suggests around 100 min for charging the battery from 25 to 75% state-of-charge. Any other trade-off between those two extreme cases is achievable using the proposed charging protocol as well. | |||
|
Keywords: Charging optimization, Battery degradation, Electro-thermal equivalent circuit model, Electric vehicles, Lithium iron phosphate Appleton, S., Fotouhi, A.: A model-based battery charging optimization framework for proper trade-offs between time and degradation. Automot. Innov. 6(2), 204–219 (2023) |
|||
| Full Paper Reading>> | |||
|
Numerical Study of Heat Transfer Enhancement in the Electric Vehicle Battery via Vortex-Induced Agitator Yubo Lian, Yinsheng Liao, Jianjian Liu, Zhiming Hu & Haolun Xu |
||
| Convective heat transfer plays an important role in the development of a high-performance battery cell. Electric vehicles carry a large amount of the battery cells to reach a longer range of endurance mileage. Thermal diffusion around the battery cells can be considered as obstacles to improve the convective heat transfer coefficient. In this paper, a novel agitator taking advantage of strong vortices is designed to disrupt the thermal boundary layer around the battery cells, thereby improving the fluid mixing for enhanced convective heat transfer. A fluid–structure interaction algorithm is developed to simulate the convective heat transfer rate at various flapping motion. Under the comparison with clean channel, the vortex-induced vibration by the agitated beam can increase the average Nusselt number by 119.59%. This research can be applied to optimize the thermal-structure design inside the electric vehicle battery. | |||
|
Keywords: Electric vehicle battery, Thermal management, Fluid–structure interaction, Air cooling
Lian, Y., Liao, Y., Liu, J. et al.: Numerical study of heat transfer enhancement in the electric vehicle battery via vortex-induced agitator. Automot. Innov. 6(2), 244–255 (2023) |
|||
| Full Paper Reading>> | |||
|
Review of Abnormality Detection and Fault Diagnosis Methods for Lithium-Ion Batterie Xinhua Liu, Mingyue Wang, Rui Cao, Meng Lyu, Cheng Zhang, Shen Li, Bin Guo, Lisheng Zhang, Zhengjie Zhang, Xinlei Gao, Hanchao Cheng, Bin Ma & Shichun Yang |
||
| Electric vehicles are developing prosperously in recent years. Lithium-ion batteries have become the dominant energy storage device in electric vehicle application because of its advantages such as high power density and long cycle life. To ensure safe and efficient battery operations and to enable timely battery system maintenance, accurate and reliable detection and diagnosis of battery faults are necessitated. In this paper, the state-of-the-art battery fault diagnosis methods are comprehensively reviewed. First, the degradation and fault mechanisms are analyzed and common abnormal behaviors are summarized. Then, the fault diagnosis methods are categorized into the statistical analysis-, model-, signal processing-, and data-driven methods. Their distinctive characteristics and applications are summarized and compared. Finally, the challenges facing the existing fault diagnosis methods are discussed and the future research directions are pointed out. | |||
|
Keywords: Lithium-ion battery, Degradation mechanism, Fault diagnosis, Abnormality detection, Battery safety Liu, X., Wang, M., Cao, R. et al.: Review of abnormality detection and fault diagnosis methods for lithium-ion batteries. Automot. Innov. 6(2), 256–267 (2023) |
|||
| Full Paper Reading>> | |||
| SAECCE 2023 to be held on October 25-27 in Beijing | |||
 The 30th China SAE Congress & Exhibition (SAECCE 2023) will be held on October 25-27, 2023 at the Beiren Etrong International Exhibition and Convention Center in Beijing. With an expected attendance of over 3,500 participants, SAECCE 2023 will feature a comprehensive program that includes 70+ keynote reports, academician forums, thematic forums, technical seminars, and more. The exhibition component of SAECCE 2023 will span three days and cover an impressive 12,000 square meters of space. With an estimated 20,000+ professional visitors expected, the event promises to be a hub of industry insights and opportunities. To stay updated on SAECCE 2023, visit the official website at http://www.saecce.org.cn/EN/home/ . |
|||
| ALCE 2023 to be held on September 20-22 in Yangzhou | |||
 China SAE is set to host the 2023 International Automotive Lightweight Conference & Exhibition in Yangzhou, China from September 20-22, 2023. This prestigious event will feature two main venues, including the 10th China Lightweight Body Conference for both passenger cars and commercial vehicles. With over 20 professional sessions, five release activities, and two postgraduate forums, attendees can expect to be immersed in a wealth of knowledge and insights. The conference will showcase more than 100 professional and technical reports, presented by over 600 experts from both domestic and international backgrounds. Additionally, more than 70 automotive enterprises and over 500 core parts and components enterprises, materials enterprises, universities, and research institutes will be in attendance. This impressive lineup is expected to draw a cumulative total of over 2,000 participants for the conference and an additional 4,000 individuals for the exhibition. For more detailed information about the conference and exhibition, click here . |
|||
| WNEVC 2023 (IAA Mobility Session) Program Released | |||
 The 2023 World New Energy Vehicle Conference (IAA Mobility Session) will be held in Germany on September 6-7, co-hosted by China-SAE, VDA, and the International Organization for World New Energy Vehicle Conference. The conference, which will take place during the International Automotive and Intelligent Mobility Expo (IAA Mobility), aims to explore the theme of "Green Mobility, Cooperation and Win-Win." The event will focus on discussing the importance of sustainable transportation and fostering collaboration for a greener future. For more information, please click here . |
|||
|
Automotive Innovation Sponsored by China SAE and published globally via Springer Nature, Automotive Innovation aims to be a world-class journal that provides abundant sources of innovative findings for automotive engineers and scientists. The journal is published quarterly, ensuring high-quality papers satisfying international standards. With the editorial board consisting of world-renowned experts, it has attracted readers from 72 countries and regions. The highest download of a single article wins more than 32,000. The journal is indexed in Ei Compendex, ESCI, and Scopus (IF2022=6.1). The journal provides a forum for the research of principles, methodologies, designs, theoretical background, and cutting-edge technologies in connection with the development of vehicle and mobility. The main topics cover: energy-saving, electrification, intelligent and connected, safety, and emerging vehicle technologies. Editors-in-Chief Jun Li, Academician of CAE, President of China SAE, Professor of Tsinghua University Frank Zhao, Honorary Lifetime President of FISITA, Director of Tsinghua Automotive Strategy Research Institute, Professor of Tsinghua University Executive Associate Editor-in-Chief Prof. Xinjie Zhang, Professor of Jilin University |
||||
|
Paper submission and browse www.ChinaSAEJournal.com.cn www.springer.com/42154 Contacts: Ms. Lily Lu Tel: +86-10-50950101 Email: jai@sae-china.org 
|
|
|||
Sponsored by
|
Published by
|
|||