Akademik Veri Yönetim Sistemi
Energy Technology, cilt.14, sa.3, 2026 (SCI-Expanded, Scopus)
The regulation of thermal dynamics in lithium-ion batteries is vital for operational efficiency, safety, and longevity in electric vehicles, especially under elevated ambient temperatures and heightened discharge requirements. The present study analyzes the thermal characteristics of a prismatic (Formula presented.) lithium-ion battery under diverse ambient temperature conditions and discharge rates, employing the ANSYS Fluent computational platform. At an environmental temperature of 45 (Formula presented.) C and a discharge rate of 5C, the temperature of the battery surface was observed to surpass the permissible operational limit, underscoring the necessity for a robust thermal management strategy. To address this, a composite phase change material-based thermal management system incorporating RTHC44 and expanded graphite was proposed. The influence of phase change material thickness and expanded graphite content on thermal performance was evaluated. Results indicated that a phase change material layer thickness of 9 mm successfully maintained the battery surface temperature below 60 (Formula presented.) C. Additionally, an expanded graphite content of 12 wt% was identified as the optimal composition for enhancing thermal conductivity. This research offers significant perspectives for optimizing thermal management systems with phase change materials to enhance lithium-ion battery performance and reliability.