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Thermal performance analysis of L-shaped ultra-thin vapor chamber for lithium battery thermal management considering tilt angle and vibration

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  • Yi, Feng
  • Gan, Yunhua
  • Li, Rui

Abstract

Ultra-thin vapor chamber utilizing phase change technology have shown promise in improving the temperature uniformity of battery packs. This study developed a new type of bent ultra-thin vapor chamber and experimentally investigated its performance under various operating conditions such as different tilts, vibrations, and different water temperatures. A battery thermal management system was also constructed to analyze its performance in a pack configuration. The results indicate that thermal resistance gradually increases as the tilt angle increases from 0 to 45° and gradually decreases as the angle increases from 45 to 90°, with 45° being the angle of maximum thermal resistance. Under vibration conditions, thermal resistance decreases when the tilt angle is between 0 and 30° and increases when the angle is between 45 and 90°. Regardless of vibration, the thermal resistance is the greatest at a tilt of 45°. Additionally, when the coolant temperature is 10° and 25°, the temperature can be maintained below 40° even at a 3C discharge rate. After forming a battery pack, regardless of how the coolant temperature varies between 10 °C and 40 °C, the temperature difference within the battery pack can be controlled within 5 °C.

Suggested Citation

  • Yi, Feng & Gan, Yunhua & Li, Rui, 2025. "Thermal performance analysis of L-shaped ultra-thin vapor chamber for lithium battery thermal management considering tilt angle and vibration," Energy, Elsevier, vol. 320(C).
    • Handle: RePEc:eee:energy:v:320:y:2025:i:c:s0360544225011193
    DOI: 10.1016/j.energy.2025.135477
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