Akademik Veri Yönetim Sistemi
Heat Transfer Engineering, 2026 (SCI-Expanded, Scopus)
Ensuring effective thermal management of lithium-ion batteries under challenging conditions—such as high ambient temperatures and rapid discharge rates—is critical for maintaining the operational safety and reliability of electric vehicles. Therefore, this study implemented a passive battery thermal management system utilizing a composite phase change material matrix augmented with expanded graphite, positioned circumferentially around the lithium-ion cell to augment heat dissipation and maintain optimal operating temperatures. The results indicated that under an ambient temperature of 35 °C and a high discharge rate of 5 C, the battery cell temperature escalated to 50.57 °C when no active or passive thermal management system was employed. To enhance the thermal performance of the composite phase change material system, varying concentrations of expanded graphite were incorporated into RT44HC, alongside adjustments in material thickness. The composite phase change material containing 12 wt% expanded graphite with a 7.5 mm thickness was the optimum battery thermal management system condition, exhibiting a lithium-ion battery temperature of 39.34 °C. This study provides critical insights into enhancing the thermal management of lithium-ion batteries through the integration of composite phase change materials, thereby facilitating the design of compact and efficient battery thermal management systems.