Modeling and simulation of inhomogeneities in a 18650 nickel-rich, silicon-graphite lithium-ion cell during fast charging

JOURNAL OF POWER SOURCES

卷:412

Article

Sturm, J.¹  Rheinfeld, A.¹  Zilberman, I.¹  Spingler, F. B.¹  Kosch, S.¹  Frie, F.^2,3  Jossen, A.¹ 

[1] Tech Univ Munich, Inst Elect Energy Storage Technol EES, Arcisstr 21, D-80333 Munich, Germany

[2] Rhein Westfal TH Aachen, Inst Power Elect & Elect Drives ISEA, Chair Electrochem Energy Convers & Storage Syst, Jagerstr 17-19, D-52066 Aachen, Germany

[3] Julich Aachen Res Alliance, JARA Energy, Julich, Germany

关键词: Lithium-ion battery;    Nickel-rich;    Lithium plating;    Fast charging;    Multi-dimensional model;    Pseudo-two dimensional model;   

DOI  :  10.1016/j.jpowsour.2018.11.043

来源: Elsevier

【 摘 要 】

Recent high-energy lithium-ion batteries contain highly densified electrodes, but they are expected to endure fast charging without safety compromises or accelerated aging. To investigate fast charging strategies, we use a multi-dimensional model consisting of several newman-type electrochemical models (p2D) coupled to an electrical-thermal cell domain model. Open-circuit potential, infrared thermography and calorimetry experiments of a high-energy 18650 NMC-811/SiC lithium-ion cell are used for model parameterization and validation. First, a single p2D model is used to compare the charging rate capabilities of NMC-811/SiC and NMC-111/graphite cells. We assess the modeling error of the single p2D model relative to the multi-dimensional model as a function of tab design. The multi-dimensional model is then used to study different tab and electrode designs regarding their susceptibility to lithium plating, which is evaluated based on local anode overpotential and local temperature. High-rate charging current profiles that minimize the risk of lithium plating are derived by implementing an anode potential threshold. We show that a state of charge beyond 60% can be reached in less than 18 min.

【 授权许可】

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