【摘要】 选择以液冷板作为电动车辆动力电池冷却方式的热管理系统为研究对象,采用仿真模拟的方法,应用有限元仿真软件Ansys建立动力电池-液冷换热器耦合模型,对不同截面流道下的液冷板对动力电池组温度分布的影响进行了研究,并以此为基础,提出导热强化方案,对比分析铝片与石墨片两种导热材料对于控制电池组温度与改善电池组温均性的影响。结果表明:正方形截面流道较圆形截面流道更能有效降低电池组最高温度及流道进出口压差,但同时会增加电池组的温度不均匀性;导热强化方案可有效改善电池组温均性,但在控制电池组最高温度方面作用不明显,并且同等重量下石墨片的导热强化效果高于铝片。更多还原

【Abstract】 The thermal management system with liquid-cooled plate is selected as the cooling method of lithium power battery to research. By using the method of simulation,the finite element simulation software Ansys was used to establish the coupling model of the power battery-liquid cooling heat exchanger. The influence of the liquid-cooled plate under different cross-section flow paths on the temperature distribution of the power battery were studied,based on this,a thermal conduction enhancement scheme was proposed,comparative analysis of the effects of two kinds of thermal conductive materials-aluminum and graphite on controlling the temperature of the battery pack and improving the temperature uniformity of the battery pack. The results show that the square cross-section flow channel can effectively reduce the maximum temperature of the battery pack and the pressure difference between the inlet and outlet,but increase the temperature non-uniformity of the battery pack at the same time. The enhancement scheme can effectively improve the temperature uniformity of the battery pack,but the effect is not obvious in controlling the maximum temperature of the battery pack,and the heat conduction enhancement effect of the graphite under the same weight is higher than aluminum.更多还原