【摘要】 为解决相变材料（PCM）导热性差及液化不均导致的散热问题，本文提出一种蜂窝状PCM耦合翅片的锂离子电池热管理系统。在传统直翅片基础上设计7种新型翅片，共8种结构于4 C放电倍率下对比分析，优选最优构型；进而研究横向翅片覆盖面积、数量及接触面积对散热性能的影响，并考察流道数的作用。结果表明：PCM—翅片复合结构显著优于纯PCM方案；增大横向翅片参数可有效降温。最优翅片较传统直翅片最高温度降低2.78 K，最大温差减小2.25 K；当流速为0.03 m/s、流道数为6时，电池最高温度为316.9 K，最大温差为1.01 K，满足热管理需求且无需额外能耗。更多还原

【Abstract】 To address the heat dissipation issues of phase change materials(PCMs) caused by their poor thermal conductivity and uneven liquefaction, this paper proposes a lithium-ion battery thermal management system(BTMS) based on a honeycomb-structured PCM coupled with fins. Seven new types of fins in eight structures designed on the basis of traditional straight fins are subject to comparative analysis at 4 C discharge rate to select the optimal one, and, in further, to study the effects of the coverage area, number, and contact area of transverse fins on the heat dissipation performance and the function of the number of flow channels. The results show that the PCM-fin composite structure is significantly superior to the single PCM structure. Increasing the parameters of transverse fins can decrease effectively the temperature. Compared with the traditional straight fin, the optimal fin structure reduces the maximum temperature by 2.78 K and the maximum temperature difference by 2.25 K. When the flow velocity is 0.03 m/s and the number of flow channels is 6, the maximum battery temperature is 316.9 K and the maximum temperature difference is 1.01 K, meeting the thermal management requirements without additional energy consumption.更多还原