不同放电倍率下锂电池发热分析与试验

针对纯电动汽车在放电过程中发热严重的问题,对不同放电倍率下电池的发热情况进行探究.建立一个准确的电池发热模型.首先进行不同温度下的内阻试验,采用密集的温度区间进行试验,探究不同温度对电池内阻的影响,验证了电池内阻随温度变化的规律,然后通过CATIA建立单体电池3维模型,导入到ICEM中划分网格,在网格质量达到标准的前提下,最后通过FLUENT软件对锂电池进行热流场的分析,分别模拟不同放电倍率下电池发热情况,并进行试验验证.结果表明：放电倍率对电池的温升影响很大,大放电倍率下的电池温升更快,温度更高....

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Bibliographic Details
Published in江苏大学学报（自然科学版） Vol. 38; no. 2; pp. 133 - 138
Main Author 盘朝奉 张良 陈龙 江浩斌 丁亚强
Format Journal Article
LanguageChinese
Published 江苏大学 汽车与交通工程学院, 江苏 镇江 212013 2017
江苏大学 汽车工程研究院, 江苏 镇江 212013%江苏大学 汽车与交通工程学院,江苏 镇江,212013
Subjects
FLUENT
仿真
温升
纯电动汽车
锂离子电池
温升
纯电动汽车
FLUENT
lithium ion battery
temperature rise
simulation
锂离子电池
仿真
pure electric vehicle
Online AccessGet full text
ISSN1671-7775
DOI10.3969/j.issn.1671-7775.2017.02.002

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Summary:针对纯电动汽车在放电过程中发热严重的问题,对不同放电倍率下电池的发热情况进行探究.建立一个准确的电池发热模型.首先进行不同温度下的内阻试验,采用密集的温度区间进行试验,探究不同温度对电池内阻的影响,验证了电池内阻随温度变化的规律,然后通过CATIA建立单体电池3维模型,导入到ICEM中划分网格,在网格质量达到标准的前提下,最后通过FLUENT软件对锂电池进行热流场的分析,分别模拟不同放电倍率下电池发热情况,并进行试验验证.结果表明：放电倍率对电池的温升影响很大,大放电倍率下的电池温升更快,温度更高.
Bibliography:To solve the problem of serious heat generating during the discharge of electric vehicle,the heating conditions of battery with different discharge rates were investigated. An accurate model of the battery heating was established. The internal resistance experiments were conducted at different temperatures using dense temperature range. The influence of temperature on internal resistance of battery was discussed to verify the changing regularity of battery internal resistance with temperature. The threedimensional model of single battery was established by CATIA and imported into ICEM to divide the mesh. Under the premise of grid quality,the thermal field of lithium battery was analyzed by FLUENT software. The battery heating conditions were simulated for different discharge rates and verified by experiment. The results show that the discharge rate has great influence on temperature rise of battery,and the battery temperature is rised faster and higher at high discharge rate.
32-1668/N
pure electric vehicle; li
ISSN:1671-7775
DOI:10.3969/j.issn.1671-7775.2017.02.002