Modeling the effects of state of charge and temperature on calendar capacity loss of nickel-manganese-cobalt lithium-ion batteries

电池(电) 锂(药物) 荷电状态 离子 材料科学 电荷(物理) 国家(计算机科学) 无机化学 化学 热力学 冶金 计算机科学 物理 功率(物理) 心理学 算法 有机化学 精神科 量子力学
作者
Boman Su,Xinyou Ke,Chris Yuan
出处
期刊:Journal of energy storage [Elsevier]
卷期号:49: 104105-104105 被引量:12
标识
DOI:10.1016/j.est.2022.104105
摘要

• An electrochemical model was applied to study the battery calendar capacity loss. • Modeling results was validated with experimental data of an 18,650 Li-ion cell. • Factors affecting the calendar loss of NMC-graphite Li-ion battery were studied. • A lower temperature and a lower SOC lead to a smaller calendar capacity loss. Lithium-ion (Li-ion) batteries with nickel-manganese-cobalt (NMC) cathode and graphite anode are popularly used in portable electronic devices and electric vehicles. Calendar loss of the lithium-ion battery is a dominating factor in battery degradation during long-term usage. However, only a few physics-based modeling works were reported on studying the calendar capacity loss of NMC-graphite Li-ion batteries, while none of them can depict the complete voltage behavior during the storage period. In this work, a Pseudo-2D model for an NMC-graphite Li-ion battery was developed and applied to investigate its calendar loss behavior. Various factors affecting the calendar loss of the NMC-graphite batteries were systematically studied, with the results validated using experimental data of a Sanyo 18,650 cylindrical cell. It was found that at 25 °C working temperature and 100% state of charge (SOC), the capacity drops 6.3% of its original capacity after 10 months. Our simulation results demonstrate that a lower SOC and a proper cell working temperature could prolong the battery life during the storage period. This modeling work can help improve understanding of the calendar loss behavior of NMC-graphite Li-ion batteries and provide valuable guidance for battery performance optimization in the future.
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