Journal
ENERGIES
Volume 15, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/en15103822
Keywords
battery; EIS; Li-ion; NMC; Warburg; 18650
Categories
Funding
- MORE/ELAPSED as part of dtec.bw-Digitization and Technology Research Center of the Bundeswehr
- Swedish Energy Agency (Energimyndigheten)
Ask authors/readers for more resources
This article introduces the application of electrical models of battery cells in research and development. Experimental comparisons were made on the impact of different equivalent circuit models on the parameters of lithium-ion battery cells. The study results assist battery system designers and electronic engineers in selecting appropriate battery cells for applications.
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available