Abstract: This paper builds an experimental platform for battery liquid-cooled plate heat dissipation system. Pure water, microencapsulated phase change material suspension (MEPCMS) and one-component/two-component $ Fe_{3}O_{4} $ nanoparticle-reinforced MEPCMS were used as cooling fluids, respectively. Comparative analysis of the cooling effect of coolants on simulated batteries at different inlet flow rates and suspension mass fractions was conducted. The results show that MEPCMS with a mass fraction of 20% is more effective in cooling compared to pure water, reducing the battery temperature by 8.34% at 2.0C discharge multiplier. The temperature drop performance of MEPCMS increases with increasing inlet flow rate and mass fraction. Matching the mass fraction and inlet flow rate for optimal battery cooling requires that the internal phase change material is always in a molten state during flow. In addition, the nanoparticle-enhanced suspension is cooled more effectively. Considering the two parameter indicators of average battery temperature and flow pressure drop, the one-component suspension with nanoparticles added in the shell is a more suitable cooling medium for heat dissipation in automotive batteries.
Keywords: phase change microcapsule; suspension; battery cooling; convective heat transfer; nanoparticle
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