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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.10244 |
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Table of Contents:
- Lithium-ion batteries are extensively utilized as the primary power source for electric vehicles due to their high energy density, environmental friendliness and lightweight nature. However, their performance and safety are highly dependent on operating temperature. Therefore, a battery thermal management system (BTMS) is essential to ensure the reliable operation and safety of electric vehicles. This study presents a battery thermal management system incorporating phase change material (PCM) and air cooling in a cylindrical lithium-ion cell with fins to enhance heat dissipation. The effects of each system on maximum and minimum temperature, and temperature uniformity along the battery cell are analyzed. Additionally, the impact of fins in both systems is evaluated against a finless cell. A numerical analysis utilizing ANSYS software and the finite volume method (FVM) is performed to evaluate the cooling performance of the systems. The results show that PCM reduces both the maximum and minimum temperatures compared to the air cooling system due to the phase change mechanism. In the finless battery case, the maximum temperature decreases from 316 K to 304 K when using PCM instead of the air cooling system. Also, in the same fin-based battery, the minimum temperature decreases from 307 K to 302 K by using PCM instead of the air cooling system, leading to improved temperature stability. The results indicate that, in general, the fins help reduce the maximum cell temperature when compared to the case without fins in both cases. Using rectangular fins reduces the maximum temperature by approximately 3% compared to a finless battery in the air cooling system. Additionally, the presence of fins reduces the temperature difference along the battery, ensuring a more uniform temperature distribution, such that, in the PCM system with rectangular fins, the temperature difference remains below 1 K.