单体NCM三元锂电池热特性实验与仿真研究  

Experimental and simulation studies on the thermal characteristics of monolithic nickel-cobalt-manganese acid lithium batteries

作　　者：王盛 袁文奇 尉庆国[1] 任润国 WANG Sheng;YUAN Wenqi;WEI Qingguo;REN Runguo(School of Energy and Power Engineering,North University of China,Taiyuan 030051,China;Inner Mongolia First Machinery Group Co.,Ltd.,Baotou 014032,China;Shanxi New Energy Vehicle Industry Co.,Ltd.,Jinzhong 030600,China)

机构地区：[1]中北大学能源与动力工程学院,太原030051 [2]内蒙古第一机械集团有限公司,内蒙古包头014032 [3]山西新能源汽车工业有限公司,山西晋中030600

出　　处：《重庆理工大学学报（自然科学）》2023年第9期340-348,共9页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金项目(51905496)。

摘　　要：为探究NCM三元锂电池在FSEC赛事工况下的热特性规律和应用于FSEC赛事的可行性,先通过实验探究了电池的内阻和SOC的关系以及电池在模拟赛事工况下放电时的温度变化情况,然后基于电池内阻和SOC间的关系,建立了电池热效应模型,利用此模型计算了仿真条件下电池的温升和温差变化情况。将实验和仿真数据相结合,对比分析得:①在正常赛事工况下,所研究电池的温升和温差变化与放电时间呈正相关;②电池在所设定的正常放电工况下均能正常工作;③仿真和实验的误差在合理范围内,所建立的热效应模型较为合理。最后通过增加对电池在极限工况下放电时的热特性研究,验证了所研究电池能够应用于FSEC赛事,且所探究电池的热特性规律和热效应模型较为合理,为后续车辆电池热管理系统的设计奠定相应的基础。To investigate the thermal characteristics of NCM ternary lithium batteries under FSEC event conditions and the feasibility of their application in FSEC events.The relationship between the internal resistance and the SOC of the battery and the temperature change of the battery when discharged under specified operating conditions were first investigated experimentally.Then based on the relationship between the internal resistance of the battery and the SOC,a model of the thermal effect of the battery was developed,using this model to calculate the temperature rise and temperature difference variation of the battery.A comparative analysis of the experiments and simulations leads to the following conclusions:①the temperature rise and temperature difference of the studied battery are positively correlated with the discharge time;②the battery can work normally under the set normal discharge conditions;③the established thermal effect model is reasonable.Finally,by adding a study of the thermal characteristics of the battery when discharged under extreme operating conditions,the above conclusions are verified to be more accurate.This study will provide the appropriate basis for the design of subsequent battery thermal management systems for vehicles.

关 键 词：电池热特性 温升实验 HPPC内阻实验 CFD仿真 

分 类 号：TM911[电气工程—电力电子与电力传动]