锂离子电池在高脉冲工况下老化机理的分析与研究  

Analysis and research on aging mechanism of lithium-ion battery under high pulse current condition

作　　者：康健强[1,2] 龚智超 钱春虎 王菁 朱国荣[4] KANG Jianqiang;GONG Zhichao;QIAN Chunhu;WANG Jing;ZHU Guorong(Hubei Key Laboratory Advanced Technology for Automatic Components Wuhan University of Technology,Wuhan 430070,China;Hubei Research Center for New Energy and Intelligent Connect Vehicle,Wuhan University of Technology,Wuhan 430070,China;Wuhan Flextech Company,Wuhan 430070,China;School of Automation,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]武汉理工大学湖北省新能源与智能网联车工程技术研究中心,湖北武汉430070 [3]武汉美格科技股份有限公司,湖北武汉430070 [4]武汉理工大学自动化学院,湖北武汉430070

出　　处：《电工电能新技术》2023年第10期35-45,共11页Advanced Technology of Electrical Engineering and Energy

基　　金：舰船综合电力技术国防科技重点实验室基金项目(614221720200306)。

摘　　要：随着性能的不断提高,锂离子电池也开始应用到高能器件上,通常要求电池频繁做大电流脉冲放电。然而当前学术界对电池老化的研究只关注循环充、放电工况或其他车用工况,对高脉冲工况缺少研究。本文旨在研究高脉冲工况下锂离子电池老化特性及规律。在循环工况实验过程中,通过电性能测试,即容量测试、混合脉冲功率特性测试和容量增量测试,分析锂离子电池的老化特征。结果表明,相对于1 C循环老化工况,高倍率脉冲放电工况下的电池容量衰减更快,至480周循环容量衰退率就达到21.8%。内阻增加同样表现得迅速,480周循环极化内阻与欧姆内阻增长率分别达到85.0%与141.3%,是1 C循环工况电池的数十倍。同样IC/DV曲线变化也更加明显。With the continuous performance improvement,lithium-ion batteries have been applied to high-energy devices,which usually require the battery to frequently discharge with large pulse current.However,the academic research on battery aging nowadays merely focuses on the cycle of charging and discharging or other conditions of vehicles.There is a lack of research on high pulse current conditions.The purpose of this paper is to study the aging characteristics and laws of lithium-ion batteries under high pulse current conditions.During the cycle condition experiments,the aging characteristics of lithium-ion batteries are analyzed through the electrical performance test,which includes capacity test,hybrid pulse power characterization(HPPC)test,and incremental capacity(IC)test.The results show that compared with 1C cycle aging condition,the battery capacity decays faster under high pulse current discharge condition.The capacity decay rate reaches 21.8%at 480 cycles.The increase of internal resistance is also rapid.The growth rates of polarization internal resistance and ohmic internal resistance of 480 cycle are 85.0%and 141.3%,respectively,which are tens of times that of 1 C cycle battery.Similarly,the change of IC/DV curve is much more obvious.

关 键 词：高脉冲 容量测试 HPPC 容量增量 微分电压 电池老化 

分 类 号：TM912[电气工程—电力电子与电力传动]