كريم والي

Battery thermal management systems in electric vehicles play a crucial role in optimizing the performance an‎d safety of these vehicles. Lithium-ion batteries, due to their high energy density an‎d long lifespan, have been selec‎ted as the primary energy source in electric vehicles. However, these batteries require specific temperature conditions for optimal performance, which must remain within the range of 15 to 35°C. In this study, hybrid thermal management systems have been designed an‎d eva‎luated to improve the thermal performance of lithium-ion batteries. These systems use a combination of thermoelectric technologies an‎d phase change materials, along with aluminum foam, to reduce the battery temperature under both normal an‎d critical operating conditions. Numerical modeling was conducted to simulate various operating conditions, including a current intensity of 1A an‎d an ambient temperature of 297 K. The results demonstrated that the hybrid system is capable of maintaining the battery cell temperature within the optimal range, preventing temperature from exceeding 306 K, which is essential for the safe an‎d long-term operation of the batteries. Furthermore, the passive system, under thermoelectric failure conditions, was able to maintain the cell temperature around 315 K, still below the critical threshold of 323 K. In this study, the performance of thermal management systems was simulated under real driving conditions, an‎d the results showed that the hybrid system successfully kept the cell temperatures within the optimal range throughout various driving cycles. Specifically, the cell temperature in real driving conditions was maintained at 302 K in the hybrid system. Moreover, hybrid systems not only showed better performance under normal conditions but also prevented dangerous phenomena like thermal runaway in critical conditions. This study emphasizes the importance of combined cooling systems in optimizing energy consumption an‎d maintaining safety at various temperatures.

سيستم مديريت حرارتي , باتري ليتيوم-يون , ترموالكتريك , خنك‌كاري تركيبي , ماده تغيير فازدهنده

Thermal Management Systems , Lithium-ion Batteries , Thermoelectric , Hybrid Cooling , Phase Change Materials

Kareem Wali

Dr. Ayat Gharehghani