Validation study of the cell cooling coefficient as a heat rejection parameter for a prismatic-type lithium-ion battery cell through tab and surface cooling

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ID: 286925
2025
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Abstract
The Cell Cooling Coefficient (CCC) is a novel, standardized parameter developed to evaluate the heat rejection capabilities of lithium-ion batteries (LIBs), addressing the critical challenges of performance, safety, and longevity. This study validates the CCCsurf (surface cooling) and CCCtabs (tab cooling) as heat rejection metrics for a prismatic-type LIB cell through experimental testing and analysis. Using a custom-built CCC determination system, steady-state heat rejection was achieved via a square wave pulsing method. The system incorporated modular heat fins, a Python-based battery cycler program, and thermocouples to measure key temperatures during operation. The results demonstrated that CCCsurf (0.3719 W/K) was significantly higher than CCCtabs (0.1027 W/K), consistent with existing studies on pouch cells. Surface cooling was found to be more effective in overall heat rejection, while tab cooling excelled in maintaining thermal uniformity. Challenges unique to prismatic cells, such as limited tab surface area and convective heat loss, influenced the cooling performance. Additionally, varying C-rate values during square wave pulsing revealed that higher C-rates increased the maximum temperature developed and cell heat rate, highlighting the dependence of heat rejection on operational conditions. These findings reinforce the CCC’s potential as a standardized metric for comparing thermal performance across cell types and chemistries. By validating CCC metrics for prismatic cells, this study contributes to advancing thermal management strategies, optimizing battery design, and improving safety and longevity in applications such as electric vehicles.
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Authors Rustia, Nathaniel Franz N.
Journal Malay Journal
Year 2025
DOI
DOI not found
URL
https://animorepository.dlsu.edu.ph/etdm_mecheng/29
Keywords Keywords not found

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