【摘要】 为了研究车用锂离子动力电池模组的散热性能,本文以5×10等间距排列的18650锂离子电池模组为研究对象,采用ANSYS AIM软件仿真了电池模组的风道方向、排布方式、进出风口位置、放电倍率对电池散热的影响。结果表明,在相同风速下,横向风道模型的电池温差低于纵向风道模型。随着风速增加,电池的最高温度、平均温度和温度差均降低。风速大于1m·s-1时,电池温差由大到小顺序为:错开排列、长方形排列、双梯形排列、梯形排列。与两侧壁面各开一个进出风口的横向风道模型相比,在进风口一侧增加一个出风口以及两侧壁面分别开设4个散热孔的横向风道模型电池的最高温度、平均温度、温差降低幅度较大;放电倍率影响电池温度和温差,放电倍率较高者,电池温度和温差较大,本实验条件下不同放电倍率下的电池温差仅为1.34℃～4.0℃,这说明该模型结构下的电池散热性能相对较好。更多还原

【Abstract】 To study the heat dissipation performance of lithium-ion power battery modules for vehicles,this article takes 5×10 equally spaced 18650 lithium-ion battery modules as the research object,and the ANSYS AIM software was used to simulate the influence of the battery module’s air duct direction,arrangement,air inlet,and outlet positions,and discharge rate on the battery’s heat dissipation.The results show that under the same wind speed,the battery temperature difference of the transverse air duct model is lower than that of the longitudinal air duct model.As the wind speed increases,the maximum temperature,average temperature,and temperature difference of the battery will all be lower.When the wind speed is greater than 1 m·s^-1,the battery temperature difference in descending order is staggered arrangement,rectangular arrangement,double trapezoidal arrangement,trapezoidal arrangement.Compared with the transverse air duct model with one air inlet and outlet on each side wall,the maximum temperature,average temperature,and temperature difference of the transverse air duct model battery with an air outlet added on one side of the air inlet and 4 heat dissipation holes on both side walls are greatly reduced;the discharge rate affects the battery temperature and the temperature difference,the higher the discharge rate,the larger the battery temperature and the temperature difference,the battery temperature difference under different discharge rates under the experimental conditions is only 1.34℃～4.0 ℃,which shows that the battery heat dissipation performance under the model structure is relatively good.更多还原