چکیده مقاله
Lithium ion batteries LIBS require effective thermal management to prevent degradation and thermal runaway, with safe operation typically maintained between 20 60°C This study focused on the multi objective optimization of a hybrid Battery Thermal Management System BTMS for 18650 cylindrical LIBS A semi elliptical Phase Change Material PCM , with RT35HC material, arrangement with an aluminum shell was proposed to enhance heat dissipation, particularly from the battery's leeward side Recognizing the low thermal conductivity of the PCM 0 2 W/m K , seven distinct aluminum fin structures were designed to improve heat transfer and were compared to a base geometry without fins Numerical simulations utilizing ANSYS Fluent, evaluated these geometries under a 5C discharge rate, equivalent to a 325,733 19 W/m³ heat generation rate The simulations employed a 2 m/s inlet air velocity and a 25°C ambient temperature The primary optimization objectives, pursued through the TOPSIS multi objective optimization method, were to minimize both the system weight and the maximum cell temperature at the end of a discharge cycle All hybrid BTMS designs successfully maintained battery temperatures below 40°C, well within the safe operating range, and demonstrated significantly enhanced heat transfer and increased PCM liquid fraction compared to non finned systems Through this optimization, Geometry 3 was identified as the optimal design, featuring three 4 mm long fins This optimal configuration achieved a maximum battery temperature of 37 83°C and a total system mass of 5 92 g This research successfully demonstrates a robust and lightweight BTMS capable of significantly mitigating thermal runaway risks and extending battery performance and lifespan Future work should expand this methodology to multi cell battery packs and investigate performance under dynamic operating conditions
کلیدواژهها
نویسندگان
Elina Firoozi
School of Mechanical Engineering, College of Engineering, University of Tehran
Ehsan Houshfar
School of Mechanical Engineering, College of Engineering, University of Tehran
شیوه ارجاع
Firoozi, Elina and Houshfar, Ehsan,1404,Multi-objective Optimization of Fin Structures for a Hybrid PCM-Forced Air Battery Thermal Management System,2nd International Conference on Modern Power Trains,Tehran
ارائهشده در
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