Optimization of LFP Pouch Cell Tab Design for Uniform Temperature Distribution

Jun Lee, Hyukkyun Chang and Chang-Wan Kim ()
Additional contact information
Jun Lee: Graduate School of Mechanical Design & Production Engineering, Konkuk University, Seoul 05029, Republic of Korea
Hyukkyun Chang: Graduate School of Mechanical Design & Production Engineering, Konkuk University, Seoul 05029, Republic of Korea
Chang-Wan Kim: School of Mechanical Engineering, Konkuk University, Seoul 05029, Republic of Korea

Mathematics, 2023, vol. 11, issue 8, 1-15

Abstract: An increase in the size of large-format Li-ion batteries (LIBs) may lead to nonuniform temperature distribution, which degrades the performance and lifespan of the LIBs. To address this issue, we performed design optimization using a 3D electrochemical-thermal coupled model for 55 Ah LFP/graphite large-format pouch cells. To minimize temperature differences in Normal Tab (NT), Lateral Tab (LT), and Counter Tab (CT) types of LIBs, design optimization was performed on the width, height, and attachment position of each positive and negative Table The upper and lower limits of each design variable were set as constraints without exceeding the sum of the total area of the tabs of the initial NT type. Owing to the optimization of the NT, LT, and CT types, the temperature difference in the optimized CT type was 79.2% less than in the initial NT type. Additionally, the potential difference decreased by 37.1%, minimizing ohmic heat. Aging analysis of 2500 cycles was performed to analyze the improvement in the lifespan due to the uniform temperature distribution. Consequently, the capacity retention rate of the optimized CT type was 6.5% higher than that of the initial NT type. Thus, the temperature distribution and lifespan of LIBs were improved by design optimization.

Keywords: large-format lithium-ion battery; 3D electrochemical-thermal model; tab size; tab attachment position; temperature difference; optimization (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2227-7390/11/8/1970/pdf (application/pdf)
https://www.mdpi.com/2227-7390/11/8/1970/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jmathe:v:11:y:2023:i:8:p:1970-:d:1129656

Access Statistics for this article

Mathematics is currently edited by Ms. Emma He

More articles in Mathematics from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().