Influence of memory effect on the state-of-charge estimation of large format Li-ion batteries based on LiFePO4 cathode

JOURNAL OF POWER SOURCES

卷:312

Article

Shi, Wei^1,2  Wang, Jiulin^2,3  Zheng, Jianming²  Jiang, Jiuchun¹  Viswanathan, Vilayanur²  Zhang, Ji-Guang² 

[1] Beijing Jiaotong Univ, Sch Elect Engn, Natl Act Distribut Network Technol Res Ctr, 3 Shangyuancun St, Beijing 100044, Peoples R China

[2] Pacific NW Natl Lab, Energy & Environm Directorate, POB 999, Richland, WA 99352 USA

[3] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

关键词: LiFePO4 battery;    Memory effect;    Partial charge;    SOC;    DOD;   

DOI  :  10.1016/j.jpowsour.2016.02.041

来源: Elsevier

【 摘 要 】

In this work, we systematically investigated the influence of the memory effect of LiFePO4 cathodes in large-format full batteries. The electrochemical performance of the electrodes used in these batteries was also investigated separately in half-cells to reveal their intrinsic properties. We noticed that the memory effect of LiFePO4/graphite cells depends not only on the maximum state of charge reached during the memory writing process, but is also affected by the depth of discharge reached during the memory writing process. In addition, the voltage deviation in a LiFePO4/graphite full battery is more complex than in a LiFePO4/Li half-cell, especially for a large-format battery, which exhibits a significant current variation in the region near its terminals. Therefore, the memory effect should be taken into account in advanced battery management systems to further extend the long-term cycling stabilities of Li-ion batteries using LiFePO4 cathodes. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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