Temperature Control Performance of Lithium-Ion Batteries Based on Composite Phase Change Materials
Phase change materials have attracted significant research attention in battery thermal management due to their effective temperature control properties attributed to their latent heat of phase change.This study focuses on a novel composite phase change material comprising paraffin,lauric acid,and expanded graphite.Experimental and simulated investigations were conducted to study its temperature rise characteristics at various environmental temperatures(20,25,30,35 ℃)and at different discharge rates(0.5 C and 1.0 C).The maximum error in the experimental simulations was controlled to be within 4.1 ℃.A comparative analysis was conducted on the difference of 6 mm and 10 mm phase change material thickness to investigate their influence on phase change cooling.Under both phase change cooling configurations,the maximum battery temperatures recorded were 49.92 ℃ and 41.94 ℃,respectively,reducing 20.28 ℃ and 28.26 ℃,respectively.Significantly,the 10 mm phase change cooling system demonstrated the capacity to entirely absorb battery-generated heat under varying operational conditions,effectively diminishing battery temperature and ensuring uniform thermal distribution,thus achieving an enhanced temperature control effect.
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