摘要
以北京奥运会纯电动公交车用90Ah锰酸锂电池为研究对象,搭建了模拟电池工作温度和实际运行电流工况的单体寿命测试平台,并分别选取10℃、25℃和40℃进行工况条件下的模拟寿命测试,分析了不同温度和不同SOC使用区间对循环寿命的影响。结果表明:可以通过阿列尼乌斯方程分析不同老化状态的电池极化阻抗与温度的关系,综合利用三阶RC等效电路模型分析电化学阻抗谱有助于得出不同SOC使用区间的极化阻抗与电池容量衰退的作用机制。对比不同加速应力的寿命测试结果,提出了优化的电池使用及管理控制方法,为大规模应用的电池选型以及延长电池寿命提供了依据。
A testing platform of single cell lifespan was set up, which is able to simulate the operating temperature and cycle life of battery. The lithium manganese LiMn20~ 90 Ah battery used in pure electric bus was taken as the research objective to simulate the lifetime test under the operation condition at 10 ℃, 25 ℃ and 40℃, and to analyze the influences of temperature and operating range of State of Charge （SOC） on the battery cycle life. The results show that, Arrhenius equation can be used to analyze the effect of temperature on the battery impedance and capacity in different aging states. The third order RC equivalent circuit and electrochemical impedance spectra are helpful to get the polarization states under different SOC ranges and analyze the mechanism of battery capacity retention. By comparing the lifespans under different accelerating stresses, an optimized control method is proposed, which can provide the basis for battery type selection and performance estimation in large scale application and prolonging the battery cycle life.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2014年第4期1081-1087,共7页
Journal of Jilin University:Engineering and Technology Edition
基金
北京市教委项目(YETP0570)
关键词
电气工程
锰酸锂电池
寿命测试
阿列尼乌斯方程
加速应力
电化学阻抗谱
electrical engineering
lithium manganese battery
lifespan test
Arrhenius equation
accelerated stress
electrochemical impedance spectra
