锂电池循环充放电过程热管理实验  

Experimental study on thermal management of lithium batteries duringcharge-discharge cycles

作　　者：周东波 杨亮[1,2] 刘道平 胡尚尚[1,2] ZHOU Dongbo;YANG Liang;LIU Daoping;HU Shangshang(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《高校化学工程学报》2023年第4期552-559,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(52176015,51606125)。

摘　　要：针对动力电池充放电过程积热问题,以动力锂电池(18650型)为研究对象,在25、30和35℃恒温环境中,研究自然风冷、强制风冷和相变材料冷却3种方式对电池在1、2和3 C倍率放电时散热性能的影响。研究结果表明,自然风冷下,电池温度随环境温度和放电倍率的增加而上升,且在35℃、3 C放电倍率时表面最高温度达到86.45℃,最大温升速率达到20.6℃·min^(-1);1和3 m·s^(-1)风速下,温度分别下降31.29%和32.61%,且3 m·s^(-1)风速时的温升速率下降至6℃·min^(-1)以下;相变材料在电池多次循环充放电过程中,对电池冷却效果最稳定,降温效果最佳,最高温度低于50℃,表面温差小于3℃,且温升速率降低至3℃·min^(-1)以下。研究结果对动力电池充放电过程热管理具有一定指导意义。In order to address heat buildup issues during power battery charge and discharge,18650 batteries were used to study heat dissipation effects of natural air cooling,forced air cooling and phase change material cooling at 1,2 and 3 C discharge rates under 25,30 and 35℃.The results indicate that the cell temperature increases with the increase of ambient temperature and discharge rate under natural air cooling.The maximum surface temperature reached 86.45℃and the maximum temperature rise rate was 20.6℃·min^(-1) at 35℃and 3 C discharge rate.The temperature dropped by 31.29%and 32.61%under 1 and 3 m·s^(-1) wind speeds,respectively.The rate of temperature rise dropped to less than 6℃·min^(-1) at 3 m·s^(-1) wind speeds.Moreover,the phase change material showed the best consistence and effectiveness.The peak temperature was less than 50℃and the surface temperature difference was less than 3℃with temperature increase rate less than 3℃·min^(-1).The results are helpful in guiding thermal management of power battery charging and discharging processes.

关 键 词：锂电池 热管理 温升速率 相变 循环 

分 类 号：TM912[电气工程—电力电子与电力传动]