首页|Thermal safety boundary of lithium-ion battery at different state of charge
Thermal safety boundary of lithium-ion battery at different state of charge
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Thermal runaway(TR)is a critical issue hindering the large-scale application of lithium-ion batteries(LIBs),Understanding the thermal safety behavior of LIBs at the cell and module level under different state of charges(SOCs)has significant implications for reinforcing the thermal safety design of the lithium-ion battery module.This study first investigates the thermal safety boundary(TSB)correspon-dence at the cells and modules level under the guidance of a newly proposed concept,safe electric quan-tity boundary(SEQB).A reasonable thermal runaway propagation(TRP)judgment indicator,peak heat transfer power(PHTP),is proposed to predict whether TRP occurs.Moreover,a validated 3D model is used to quantitatively clarify the TSB at different SOCs from the perspective of PHTP,TR trigger temper-ature,SOC,and the full cycle life.Besides,three different TRP transfer modes are discovered.The inter-conversion relationship of three different TRP modes is investigated from the perspective of PHTP.This paper explores the TSB of LIBs under different SOCs at both cell and module levels for the first time,which has great significance in guiding the thermal safety design of battery systems.
Lithium-ion batteryBattery safetyThermal runawayState of chargeNumerical analysis
Hang Wu、Siqi Chen、Yan Hong、Chengshan Xu、Yuejiu Zheng、Changyong Jin、Kaixin Chen、Yafei He、Xuning Feng、Xuezhe Wei、Haifeng Dai
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Clean Energy Automotive Engineering Center,Tongji University,Shanghai 201804,China
College of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China
State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China
国家自然科学基金国家自然科学基金Program of Shanghai Academic/Technology Research Leader
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