电池(电)
荷电状态
可靠性工程
锂(药物)
石墨
内阻
容量损失
锂离子电池
试验数据
加速老化
材料科学
计算机科学
核工程
工程类
复合材料
热力学
医学
物理
功率(物理)
程序设计语言
内分泌学
作者
Maik Naumann,Michael Schimpe,Peter Keil,Holger C. Hesse,Andreas Jossen
标识
DOI:10.1016/j.est.2018.01.019
摘要
This paper presents a comprehensive calendar aging study on a lithium-ion battery with a test duration of 29 months. This aging study was realized with a widely used commercial LiFePO4/graphite cell from Sony/Murata, which promises both long calendar and cycle lifetime, which is especially required for stationary battery applications. The development of the cells’ capacity, as well as the resistances, are shown in a static calendar aging study for 17 test points, each with 3 cells, having constant storage conditions of temperature and state of charge. Based on the measurement data, a semi-empirical aging model is presented for the capacity loss and resistance increase, consisting of only 5 parameters which are valid for all storage conditions. An additional dynamic calendar aging study is performed with 9 months test duration for model validation, consisting of 15 test points with varying conditions of temperature and state of charge. The absolute model errors against the validation data points remain below 2.2% for the capacity loss and below 6.9% for the resistance increase for all dynamic validation tests. In conclusion, this calendar aging model allows the prognosis of the calendar lifetime of LiFePO4/graphite batteries in different applications with varying storage conditions over time.
科研通智能强力驱动
Strongly Powered by AbleSci AI