ياسر ميركهنوج

Electric vehicles are at the heart of the industrial revolution of our time, where much effort an‎d resources are being invested in moving towards zero emissions, in the hope of limiting global warming an‎d saving the planet. Lithium-ion batteries are the most essential an‎d widely used type of battery in these vehicles. One of the key factors affecting the performance of electric vehicles is the operating temperature of the battery pack, which affects the reaction rate within the battery. Furthermore, the lifetime of lithium-ion batteries is highly dependent on this parameter. Since battery systems must operate within an optimal temperature range to ensure performance at the cell, module an‎d pack levels, various cooling methods are currently used. These include air cooling, liquid cooling, heat pipes, phase change materials an‎d hybrid methods. An effective hybrid approach combines heat pipes with immersion cooling, which can have an impact on temperature control an‎d, consequently, battery lifetime. In this study, a novel cooling system combining heat pipes an‎d immersion cooling is introduced an‎d experimentally eva‎luated. Initially, a battery module comprising four cells was constructed an‎d tested under three cooling systems: natural air convection, immersion cooling, an‎d a combines heat pipes with immersion cooling. Subsequently, the battery module was modeled one-dimensionally using the equivalent circuit method. Finally, a Arrhenius method was employed to model the battery lifespan under the WLTP Class 3 driving cycle. The cooling test results revealed that at a C1 discharge rate, immersion cooling an‎d the hybrid heat pipe-immersion system improved performance by 10.36% an‎d 19.22%, respectively, compared to natural air convection. At a C2 discharge rate, these improvements increased to 13.26% an‎d 24.81%. After integrating various cooling systems into the vehicle an‎d analyzing battery lifetime, the results showed that immersion cooling an‎d the hybrid system enhanced battery lifetime by 14.08% an‎d 23.52%, respectively, compared to natural air convection.

سامانه مديريت حرارتي باتري , سامانه تركيبي , لوله حرارتي , غوطه‌وري , مدل عمر

Battery thermal management system , hybrid system , heat pipe , immersion , lifecycle model

Yaser Mirkahnooj

Ali Qasemian moqadam