首页|Effect of safety valve types on the gas venting behavior and thermal runaway hazard severity of large-format prismatic lithium iron phosphate batteries

Effect of safety valve types on the gas venting behavior and thermal runaway hazard severity of large-format prismatic lithium iron phosphate batteries

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The safety valve is an important component to ensure the safe operation of lithium-ion batteries(LIBs).However,the effect of safety valve type on the thermal runaway(TR)and gas venting behavior of LIBs,as well as the TR hazard severity of LIBs,are not known.In this paper,the TR and gas venting behavior of three 100 A h lithium iron phosphate(LFP)batteries with different safety valves are investigated under overheating.Compared to previous studies,the main contribution of this work is in studying and evalu-ating the effect of gas venting behavior and TR hazard severity of LFP batteries with three safety valve types.Two significant results are obtained:(I)the safety valve type dominates over gas venting pressure of battery during safety venting,the maximum gas venting pressure of LFP batteries with a round safety valve is 3320 Pa,which is one order of magnitude higher than other batteries with oval or cavity safety valve;(Ⅱ)the LFP battery with oval safety valve has the lowest TR hazard as shown by the TR hazard assessment model based on gray-fuzzy analytic hierarchy process.This study reveals the effect of safety valve type on TR and gas venting,providing a clear direction for the safety valve design.

Lithium iron phosphate batterySafety valveThermal runawayGas venting behaviorThermal runaway hazard severityGray-fuzzy analytic hierarchy process

Zhuangzhuang Jia、Yuanyuan Min、Peng Qin、Wenxin Mei、Xiangdong Meng、Kaiqiang Jin、Jinhua Sun、Qingsong Wang

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State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,Anhui,China

Gotion High-Tech Co.,Ltd.,Hefei 230012,Anhui,China

National Key R&D Program of ChinaPostgraduate Innovation and Entrepreneurship Practice Project of Anhui ProvinceChina Postdoctoral Science FoundationFundamental Research Funds for the Central UniversitiesYouth Innovation Promotion Association CAS

2021YFB24020012022cxcysj0132022T150615WK5290000002Y201768

2024

10.1016/j.jechem.2023.09.052

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.89(2)
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