乙二醇对18650动力锂电池组温度场影响研究  

Effect of ethylene glycol on temperature field of 18650 power lithium batteries

作　　者：安治国[1] 廖智伟 郭敬谊 段文卿 AN Zhi-guo;LIAO Zhi-wei;GUO Jing-yi;DUAN Wen-qing(College of Mechanical-Electronic and Automobile Engineering, Chongqing Jiao Tong University, Chongqing 400074, China)

机构地区：[1]重庆交通大学机电与车辆工程学院,重庆400074

出　　处：《电源技术》2019年第2期244-246,249,共4页Chinese Journal of Power Sources

摘　　要：将乙二醇作为冷却工质,并且建立18650动力锂电池组模型,将冷却液流速,电池组的放电倍率作为变量,通过流固耦合热仿真,对温度云图、最高温度、电池组和电池间的温度差等结果进行分析,得出在不同放电倍率条件下,冷却液体流速对电池组温度场的影响规律。结果表明采用液体冷却能有效控制电池组最高温度,得到良好的均温效果;增大冷却液流速,能够有效降低锂电池组的最高温度,而且用乙二醇作为冷却液体能有效地控制锂离子电池间的温差,并且随着流速的增大,电池组的最高温度与温差变化趋于平缓。With ethylene glycol as cooling liquid, 18650 power lithium battery model was built. Taking the coolant flow rate and the discharge rate of the battery as variables, by means of fluid solid coupling thermal simulation, the temperature nephogram, the maximum temperature, the temperature difference between the batteries were analyzed, the influence of cooling liquid velocity on the temperature field of the batteries under different discharge rates was obtained. The results show that the battery with a liquid cooling temperature can effectively control the highest temperature with good effect;increasing the coolant flow rate can effectively reduce the maximum temperature of the lithium battery;moreover, glycol used as a cooling liquid can effectively control the temperature difference between the lithium-ion batteries;with the increase of the flow rate, the maximum temperature and the temperature difference of the battery pack tend to be gradual.

关 键 词：18650动力锂电池 液冷 乙二醇 温度场 

分 类 号：TM912.9[电气工程—电力电子与电力传动]