ENHANCED BATTERY THERMAL REGULATION USING WATER–ETHANOL-BASED OSCILLATING HEAT PIPES: AN EXPERIMENTAL INVESTIGATION
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Abstract
Effective thermal management of lithium-ion batteries is crucial to ensure their performance, safety, and lifespan, particularly under high-load operating conditions. In this study, a lithium-ion battery is experimentally investigated, incorporating circular shaped oscillating heat pipe (OHP). The heat pipe was filled with a mixture of water and ethanol and was used to emulate thermal behavior under rapid discharge and thermal runaway scenarios. Experiments were conducted by varying the volume ratio (VR) and filling ratio (FR). Among the tested compositions, OHP with 50% FR and 40-60 VR of water and ethanol mixture exhibited better heat transfer performance. The temperature drops to 47.70C which is below the desired limit of 500C. Compared to the system with a 0% filling ratio, a temperature reduction of 42.5°C was observed. This significant improvement highlights the effectiveness of using a water-ethanol mixture in pulsating heat pipes for cooling lithium-ion batteries. Such a setup presents a viable and efficient solution for managing battery temperatures in electric vehicles, contributing to improved thermal stability and overall performance.
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