Simulation and Measurement of the Current Density Distribution in Lithium-Ion Batteries by a Multi-Tab Cell Approach

被引：76

作者：

Erhard, S. V. ^{[1
]}

Osswald, P. J. ^{[1
]}

Keil, P. ^{[1
]}

Hoeffer, E. ^{[1
]}

Haug, M. ^{[1
]}

Noel, A. ^{[1
]}

Wilhelm, J. ^{[1
]}

Rieger, B. ^{[1
]}

Schmidt, K. ^{[1
]}

Kosch, S. ^{[1
]}

Kindermann, F. M. ^{[1
]}

Spingler, F. ^{[1
]}

Kloust, H. ^{[2
]}

Thoennessen, T. ^{[2
]}

Rheinfeld, A. ^{[1
]}

Jossen, A. ^{[1
]}

机构：

[1] Tech Univ Munich, Inst Elect Energy Storage Technol EES, Munich, Germany

[2] Custom Cells Itzehoe GmbH, Itzehoe, Germany

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2017年 / 164卷 / 01期

关键词：

COMMERCIAL CYLINDRICAL CELLS; CHARGE INHOMOGENEITIES; IMPEDANCE SPECTROSCOPY; LOCAL POTENTIALS; INSERTION CELL; STATE; EQUALIZATION; ELECTRODES; DISCHARGE; IMPACT;

D O I：

10.1149/2.0551701jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A single-layered NMC/graphite pouch cell is investigated by means of differential local potential measurements during various operation scenarios. 44 tabs in total allow for a highly resolved potential measurement along the electrodes whilst the single layer configuration guarantees the absence of superimposed thermal gradients. By applying a multi-dimensional model framework to this cell, the current density and SOC distribution are analyzed quantitatively. The study is performed for four C-rates (0.1C, 0.5C, 1C, 2C) at three temperatures (5 degrees C, 25 degrees C, 40 degrees C).The maximum potential drop as well the corresponding SOC deviation are characterized. The results indicate that cell inhomogeneity is positively coupled to temperature, i.e. the lower the temperature, the more uniform the electrodes will be utilized. (C) The Author(s) 2017. Published by ECS. All rights reserved.

引用

页码：A6324 / A6333

页数：10

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