This study evaluates the thermal behavior of a lithium‐ion battery cell subjected to 1, 2, and 3 C discharge rates, employing a passive thermal management strategy based on phase change materials (PCMs) integrated with T‐shaped fin structures to enhance heat dissipation. In the absence of any thermal management system, the battery experiences a significant rise in temperature, with peak values reaching 308.95 K (1 C), 316.66 K (2 C), and 322.93 K (3 C), with the latter two exceeding the recommended safety limit of 313 K. PCM and fin integration significantly reduced peak temperatures, with octadecane achieving 304.4 K (1 C), 309.95 K (2 C), and 316.10 K (3 C), corresponding to reductions of 1.47%, 2.12%, and 2.11%, respectively. In comparison, nonadecane reduced temperatures to 305.82, 311.21, and 318.65 K, yielding reductions of 1.01%, 1.72%, and 1.32%, respectively. Octadecane demonstrated superior thermal performance due to its lower melting point (28°C), providing ~18%–20% higher heat transfer rates than nonadecane. Fin‐assisted configurations further enhanced performance, reducing peak temperature by up to 3.82 K at 3 C compared to non‐fin systems (319.92 K vs. 316.10 K). Liquid fraction analysis revealed higher utilization for octadecane (96.72% vs. 61.65% at 1 C) and faster complete melting (1065 s vs. 1392 s at 2 C; 618s vs. 758 s at 3 C). Electrochemical analysis showed a decrease in cathode potential from 4.3 to 2.98 V, with discharge durations of approximately 3400 s (1 C), 1700 s (2 C), and 1130 s (3 C). The main outcome of this study is that the octadecane–fin system limits peak temperature to 316.10 K at 3 C, achieving a maximum reduction of 6.83 K and enhancing heat transfer by up to 20%, thereby providing an effective and compact passive cooling strategy designed for high‐rate lithium‐ion battery applications.
Sharma et al. (Fri,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: