Overview of Battery Impedance Modeling Including Detailed State-of-the-Art Cylindrical 18650 Lithium-Ion Battery Cell Comparisons
Artikel i vetenskaplig tidskrift, 2022

Electrical models of battery cells are used in simulations to represent batteries' behavior in various fields of research and development involving battery cells and systems. Electrical equivalent circuit models, either linear or nonlinear, are commonly used for this purpose and are presented in this article. Various commercially available cylindrical, state-of-the-art lithium-ion battery cells, both protected and unprotected, are considered. Their impedance properties, according to four different equivalent circuit models, are measured using electrochemical impedance spectroscopies. Furthermore, the pricing, impedance, specific energy, and C-rate of the chosen battery cells are compared. For example, it is shown that the energy density of modern 18650 cells can vary from a typical value of 200 to about 260 Wh kg(-1), whereas the cell price can deviate by a factor of about 3 to 5. Therefore, as a result, this study presents a concise but comprehensive battery parameter library that should aid battery system designers or power electronic engineers in conducting battery simulations and in selecting appropriate battery cells based on application-specific requirements. In addition, the accuracies and computational efforts of the four equivalent circuit models are compared.

18650

EIS

NMC

battery

Warburg

Li-ion

Författare

Julian Estaller

Universität Der Bundeswehr München

Anton Kersten

Universität Der Bundeswehr München

Chalmers, Elektroteknik, Elkraftteknik

Manuel Kuder

Universität Der Bundeswehr München

Torbjörn Thiringer

Chalmers, Elektroteknik, Elkraftteknik

Richard Eckerle

Universität Der Bundeswehr München

Thomas Weyh

Universität Der Bundeswehr München

Energies

1996-1073 (ISSN) 19961073 (eISSN)

Vol. 15 10 3822

Ämneskategorier

Annan kemiteknik

Biofysik

Annan elektroteknik och elektronik

DOI

10.3390/en15103822

Mer information

Senast uppdaterat

2023-01-10