Abstract
In this study, a novel thermal management system for a 21700-type lithium-ion battery pack is designed using AgO-based nanofluid and mesh plate to regulate maximum temperature and uniformity during fast discharging. The effects of discharge C-rate, AgO nanoparticle volume fractions, inflow coolant velocity, inlet/outlet hydraulic diameters, mesh plate shape, and flow direction on thermal efficiency at a high discharge rate (7C) are numerically analyzed. Results show the highest temperature and temperature difference decrease significantly with increased inflow velocity and nanofluid volume fraction. Using 4 %-VF AgO-based nanofluid reduced the maximum temperature and temperature difference by 3.08 % and 60.7 %, respectively, compared to DI-water. Increasing inflow velocity decreased the highest temperature and temperature difference by 0.64 K and 0.3 K, respectively. Different inlet/outlet hydraulic diameters and flow directions significantly affected both the highest temperature and temperature uniformity. Comparing different mesh plate shapes of mesh plates in the thermal management system suggests that the new cooling channel format is promising.
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