Semnan University Press Journal of Heat and Mass Transfer Research 2345-508X 13 2 2026 06 01 Cooling Performance Enhancing by Employing Hybrid Pin-Blade Fin Geometry with Constant Weight for Prismatic Lithium-Ion Batteries بهبود عملکرد خنک کاری باتری لیتیوم یون منشوری با استفاده از هندسه فین پره-پین با وزن ثابت 159 174 9768 10.22075/jhmtr.2025.36024.1645 EN Somayeh Jalalichaleshtori Faculty of Mechanical Engineering, University of Kashan, Iran Ghanbar Ali Sheikhzadeh Faculty of Mechanical Engineering, University of Kashan, Iran Journal Article 2024 11 25 This research introduces a novel hybrid pin-blade fin architecture for lithium-ion battery thermal management systems, strategically integrating complementary fin geometries to overcome the traditional thermal-hydraulic performance trade-off. Through comprehensive 3D CFD simulations, the hybrid design achieves a remarkable dual improvement: maintaining battery temperatures below 21.5°C during 5C discharge (1°C lower than conventional designs) while reducing pressure drop by 30% compared to equivalent pin-fin configurations. The investigation reveals that smaller pin diameters (2.5 mm) provide superior thermal performance, while higher blade angles (80°) significantly reduce hydraulic resistance. By combining these optimal features, the hybrid architecture delivers exceptional cooling efficiency while requiring 7% less aluminum and 66% less coolant than benchmark designs. Quantitative analysis shows that reducing pin diameters from 10 mm to 2.5 mm decreases maximum battery temperature by 0.3°C, while optimizing blade orientation angles can reduce pressure drop by up to 65 Pa at 0.2 l/min flow rate. The innovative cooling plate achieves rapid thermal stabilization within 150 seconds and sustains temperature uniformity across the battery surface. This breakthrough approach resolves the long-standing dilemma between thermal regulation and hydraulic penalties in battery cooling systems, establishing a new standard for high-performance, material-efficient thermal management in electric vehicle applications. https://jhmtr.semnan.ac.ir/article_9768_ea5ffcc183fe279ef7c500cb22e72c1e.pdf