
Review on Mechanism and Model of Heat Release and Safety Modification Technology of Lithium-Ion Batteries
Shuyang Yu, Wenlei Luo, Jingying Xie, Ya Mao, Chao Xu
Prog Chem ›› 2023, Vol. 35 ›› Issue (4) : 620-642.
Review on Mechanism and Model of Heat Release and Safety Modification Technology of Lithium-Ion Batteries
Lithium-ion batteries are widely used in mobile electronic products, electric vehicles, energy storage systems, aerospace and other fields due to their high energy and power density, long life and no memory effect. However, in recent years, the frequent safety accidents of electric vehicles and energy storage systems related to battery thermal runaway have attracted high attention. The high safety of high energy density batteries is the primary guarantee to promote the large-scale application of batteries, and the research on the characteristics of battery heat generation, thermal runaway mechanism, protection and suppression methods has become a hot topic in the field of battery thermal safety research in recent years. Therefore, the core issues in the field of battery thermal safety are comprehensively reviewed in this paper. Firstly, the thermal generation characteristics of the battery under normal conditions, the thermal runaway chain exothermic reaction and the failure mechanism of the battery under three kinds of abuse conditions are discussed; Secondly, the mechanistic equation, construction, application and evolution of the electrochemical-thermal coupling model and thermal runaway model are described; and then, the research progress of anode and cathode materials, separator, electrolyte and current collector safety modification technology are introduced; finally, this paper makes a prospect for the research trend in this field to provide ideas and directions for improving the intrinsic safety of lithium-ion batteries and preventing thermal runaway.
thermal stability / thermal runaway / failure mechanism / mechanism model / modification technology
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