热失控
电池(电)
电池组
热的
变形(气象学)
材料科学
航程(航空)
汽车工程
工程类
复合材料
物理
功率(物理)
量子力学
气象学
作者
Huaibin Wang,Qinzheng Wang,Zhenyang Zhao,Changyong Jin,Chengshan Xu,Wensheng Huang,Zhuchen Yuan,Shuyu Wang,Jing Wang,Yanhong Zhao,Junli Sun,Xuning Feng
标识
DOI:10.1016/j.jechem.2023.05.015
摘要
Structurally compact battery packs significantly improve the driving range of electric vehicles. Technologies like Cell-to-Pack increase energy density by 15%–20%. However, the safety implications of multiple tightly-packed battery cells still require in-depth research. This paper studies thermal runaway propagation behavior in a Cell-to-Pack system and assesses propagation speed relative to other systems. The investigation includes temperature response, extent of battery damage, pack structure deformation, chemical analysis of debris, and other considerations. Results suggest three typical patterns for the thermal runaway propagation process: ordered, disordered, and synchronous. The synchronous propagation pattern displayed the most severe damage, indicating energy release is the largest under the synchronous pattern. This study identifies battery deformation patterns, chemical characteristics of debris, and other observed factors that can both be applied to identify the cause of thermal runaway during accident investigations and help promote safer designs of large battery packs used in large-scale electric energy storage systems.
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