储能科学与技术2024，Vol.13Issue(6)：1986-1994,9.DOI:10.19799/j.cnki.2095-4239.2024.0028
锂电池储能系统热失控气体生成及扩散规律研究
Study on the generation and diffusion law of thermal runaway gas in lithium battery energy storage system
摘要
Abstract
Lithium-ion batteries produce large amounts of flammable gases during thermal runaway,which is the main risk of explosion in energy storage systems(ESS).In order to investigate the generation and diffusion law of combustible gas in thermal runaway of ESS,we firstly tested the gas production composition of a lithium iron phosphate battery under different thermal runaway triggering conditions through experiments.Based on the experimental results,a simulation model of gas generation and diffusion in thermal runaway process of prefabricated cabin energy storage system was established,and the combustible gas diffusion law after triggering thermal runaway in different positions of battery cells was analyzed.The results show that H2 accounts for about 30%of the released gases and is not affected by air components,making it more suitable for use as a warning gas in the early stages of thermal runaway in batteries.It is found that within 3 s of the opening of the explosion-proof valve of the electric cell,H2 is mainly concentrated in the area of the battery module.With the air-cooling cycle,it spreads to the external inter-area position of the battery module,and will spread to the whole storage battery compartment within 120 s.Based on this,the optimal gas sensor and duct arrangement scheme for this energy storage module is given.The results of this paper can provide a reference for the layout of combustible gas monitoring points and the design of emission paths in energy storage systems..关键词
热失控/产气特性/锂电池储能系统/数值仿真/气体扩散Key words
thermal runaway/gas production characteristics/lithium battery storage system/numerical simulation/gas diffusion分类
信息技术与安全科学引用本文复制引用
甄箫斐,王贝贝,张小虎,孙一铭,曹文炅,董缇..锂电池储能系统热失控气体生成及扩散规律研究[J].储能科学与技术,2024,13(6):1986-1994,9.基金项目
国家自然科学基金(52206255),甘肃省自然科学基金(23JRRA917),甘肃省青年自然科学基金(23JRRA903),甘肃省住房和城乡建设厅科研项目(JK2023-49). （52206255）
