China University of Science and Technology publishes a special review article on lithium ion battery safety
At the invitation of Progress in Energy and Combustion Science, an international review journal in the field of energy and combustion, Sun Jinhua, a professor at the State Key Laboratory of Fire Science at the University of Science and Technology of China, published as a corresponding author entitled A review of lithium ion battery failure mechanisms and fire prevention strategies Commenting on the article, special professor Wang Qingsong and doctoral student Mao Binbin are the co-first authors of the paper, and associate professor Stanislav Stoliarov of the University of Maryland is a collaborator. This paper combines Sun Jinhua and Wang Qingsong ’s research achievements in the direction of lithium ion battery safety and international research trends for more than a decade, summarizes and summarizes the latest progress of lithium ion battery safety research, and analyzes and proposes the breeding mechanism of lithium ion battery thermal runaway. And disaster mechanism, and prospects for its security research direction.
Lithium-ion batteries have become the leading power source for portable electronic products due to their high energy density, excellent cycle performance, and no memory effect, and have been widely used in electric vehicles and energy storage power stations. However, due to its high energy density and flammable and explosive composition, under thermal, electrical or mechanical abuse conditions, thermal runaway combustion is prone to occur (Figure 1). In recent years, fire accidents caused by thermal runaway of lithium ion batteries have been frequent. Report. This paper first analyzes the kinetic and thermodynamic characteristics of the main chemical reactions of lithium-ion batteries at different temperatures based on the structural characteristics and constituent materials of lithium-ion batteries, clarifies the main control reactions of the thermal runaway process, and discusses lithium-ion batteries in detail The incubation mechanism of thermal runaway under typical abuse situations (Figure 2); secondly, the fire behavior of single cells and battery modules, as well as the behavioral characteristics of battery heat generation, gas production and thermal runaway expansion, analysis reveals the battery charge The influence of the state, electrode material and electrolyte on the fire behavior of the battery; third, a review of the research status of lithium-ion battery fire prevention and control technology, and the advantages and disadvantages of the technical methods for improving the intrinsic safety of lithium-ion batteries are analyzed. The battery fire extinguishing technology is summarized, summarized and commented; finally, the paper looks forward to the future research direction of battery safety.
This work is supported by the National Ministry of Science and Technology, the Fund Committee, the Ministry of Education and the Chinese Academy of Sciences.
Figure 1. Analysis of the main causes of lithium-ion battery fire accidents
Figure 2. Lithium-ion battery thermal runaway disaster course
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