Experimental determinations of thermophysical parameters for lithium-ion batteries: A systematic review

IF 15 1区 工程技术 Q1 ENERGY & FUELS
Jinghe Shi , Hengyun Zhang , Hong Yu , Yidong Xu , Shen Xu , Lei Sheng , Xuning Feng , Xiaolin Wang
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引用次数: 0

Abstract

Thermophysical parameters, including the specific heat and thermal conductivity of lithium-ion batteries (LIBs), are the key parameters for the design of battery thermal management systems in electric vehicles. The evaluations of internal temperature distribution and even the thermal safety characteristics of the batteries depend highly on these thermophysical parameters under either live operation or repose condition. In this paper, the experimental studies of the specific heat and thermal conductivity of LIBs are reviewed and discussed. This review classifies the experimental studies into ex-situ and in-situ measurements. The ex-situ measurements, based on the dissection of the battery, may differ from realistic scenarios and thus the obtained parameters may not be fully applicable for thermal prediction of practical battery systems. Contrarily, in-situ measurements better represent the realistic characteristics without dismantling the battery, which can be further categorized into weighted average method, heat flow method, dedicated equipment including accelerating rate calorimeter (ARC), calibration calorimeter in insulation, self-made calorimeter method, and so on. Due to the short test time and good size adaptability, unsteady-state in-situ measurement techniques, including the calibration calorimeter and quasi-steady state techniques, are becoming the promising research directions in the future, especially for the simultaneous determination of multiple thermal parameters. The large data scatterings are pointed out based on the existing results, and the underlying mechanisms are scrutinized. To guarantee measurement accuracy, it is indispensable to calibrate the heat loss and benchmark with standard sample tests together with rigorous uncertainty analysis. The thermophysical parameters should be determined under different temperatures, states of charge (SOC) and aging conditions to enable accurate prediction of temperature profiles and degradation for LIBs with ever increasing energy density and safety risk.

Abstract Image

锂离子电池热物理参数的实验测定:系统回顾
热物理参数,包括锂离子电池(LIB)的比热和热导率,是设计电动汽车电池热管理系统的关键参数。对电池内部温度分布乃至热安全特性的评估在很大程度上取决于这些热物理参数在带电运行或静置状态下的影响。本文回顾并讨论了有关锂离子电池比热和热导率的实验研究。本综述将实验研究分为原位测量和原位测量。原位测量基于对电池的解剖,可能与实际情况不同,因此获得的参数可能并不完全适用于实际电池系统的热预测。相比之下,原位测量能在不拆卸电池的情况下更好地反映实际特性,可进一步分为加权平均法、热流法、专用设备(包括加速速率量热仪 (ARC))、绝缘校准量热仪、自制量热仪方法等。由于测试时间短、尺寸适应性强,包括校准量热计和准稳态技术在内的非稳态原位测量技术正在成为未来有前景的研究方向,尤其是在同时测定多个热参数方面。在现有成果的基础上,指出了数据的巨大散差,并对其背后的机理进行了深入研究。为保证测量精度,必须对热损失进行校准,并通过标准样品测试和严格的不确定性分析来确定基准。应在不同温度、充电状态(SOC)和老化条件下测定热物理参数,以便准确预测能量密度和安全风险不断增加的锂电池的温度曲线和降解情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Etransportation
Etransportation Engineering-Automotive Engineering
CiteScore
19.80
自引率
12.60%
发文量
57
审稿时长
39 days
期刊介绍: eTransportation is a scholarly journal that aims to advance knowledge in the field of electric transportation. It focuses on all modes of transportation that utilize electricity as their primary source of energy, including electric vehicles, trains, ships, and aircraft. The journal covers all stages of research, development, and testing of new technologies, systems, and devices related to electrical transportation. The journal welcomes the use of simulation and analysis tools at the system, transport, or device level. Its primary emphasis is on the study of the electrical and electronic aspects of transportation systems. However, it also considers research on mechanical parts or subsystems of vehicles if there is a clear interaction with electrical or electronic equipment. Please note that this journal excludes other aspects such as sociological, political, regulatory, or environmental factors from its scope.
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