温度波动对电动汽车锂电池组放电特性的影响分析  

Effect of Temperature Fluctuation on Discharge Characteristics of Lithium Battery Pack of Electric Vehicle

作　　者：梁功川 Liang Gongchuan(College of Intelligent Manufacturing and Automobile,Neijiang Vocational and Technical College,Neijiang Sichuan 641000,China)

机构地区：[1]内江职业技术学院智能制造与汽车学院,四川内江641000

出　　处：《现代工业经济和信息化》2024年第6期289-290,293,共3页Modern Industrial Economy and Informationization

摘　　要：构建了能量和功率函数,设置了二阶RC模型分别对各温度下的串联电池组夸张了放电测试。研究结果表明:单体电池温度都介于29~38℃之间,统计样本概率后拟合函数可知,串联电池组形成了具有正态分布特征的温度曲线;提高电池组平均温度后,达到了更高能量利用率;随着温差增加,会造成电池组能量利用率下降,温差对能量利用率的影响在14℃时出现转折点。该研究为电池组热管理的温度阈值控制提供数值参考。The energy and power functions are constructed,and the second-order RC model is set up to test the discharge of series battery at different temperatures.The results show that the temperature of the single battery is between 29℃and 38℃,and the fitting function of the statistical sample probability shows that the temperature curve with normal distribution characteristics is formed by the series battery pack.Higher energy utilization is achieved by increasing the average temperature of the battery pack.With the increase of temperature difference,the energy utilization rate of the battery pack will decrease,and the influence of temperature difference on the energy utilization rate will appear a turning point at 14℃.This study provides a numerical reference for the temperature threshold control of battery thermal management.

关 键 词：锂电池组 温度波动 放电能量 峰值功率 

分 类 号：U469.72[机械工程—车辆工程] TM912[交通运输工程—载运工具运用工程]