动力电池包液冷系统结构设计及流道结构优化  

Structure design and flow channel structure optimization of power battery pack liquid cooling system

作　　者：高庆云 周鹏 刘竹丽[1] 秦东晨[1] GAO Qingyun;ZHOU Peng;LIU Zhuli;QIN Dongchen(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou Henan 450001,China;Guangdong Foshan Lian Chuang Engineering Graduate School,Foshan Guangdong 528300,China)

机构地区：[1]郑州大学机械与动力工程学院,河南郑州450001 [2]广东佛山联创工程研究生院,广东佛山528300

出　　处：《电源技术》2025年第2期374-382,共9页Chinese Journal of Power Sources

基　　金：河南省重大科技专项(221100240200)。

摘　　要：针对不同放电倍率下电池包对液冷系统的温控需求,设计了单进双出并联流道,并提出四置液冷板的冷却方案,以压降和流量均匀性为目标对单进双出并联流道结构进行优化。结果表明采用单进双出并联流道结构冷却时,电池包模组间最大温差的差值不超过0.08℃,冷却效果均衡,电池间温度一致性高。采用四置液冷板冷却时,2.5 C放电倍率下,模组间放置冷板相较于电池包侧面放置冷板最高温度低1.27℃,最大温差低1.1℃。对流道结构优化后,各流道流量最大偏差从20%下降到2.4%,压降下降了30%。优化后流道结构与蛇形流道散热性能相比,最高温度降低了2.22℃,最大温差降低了1.12℃。According to the temperature control requirements of battery pack for liquid cooling system under different discharge rates,a single input and double output parallel flow channel was designed,and a cooling scheme with four liquid cooling plates was proposed.The structure of the single input and double output parallel flow channel was optimized with the goal of the pressure drop and flow uniformity.The results show that the difference of the maximum temperature difference between the battery modules does not exceed 0.08℃when cooling with the single input and double output parallel flow channel structure,the cooling effect is balanced,and the temperature consistency between the batteries is high.When the discharge rate is 2.5 C,compared with the cold plate placed on the side of the battery pack,the maximum temperature of the cold plate placed between the modules decreases by 1.27℃,and the maximum temperature difference decreases by 1.1℃.After the optimization of the flow channel structure,the maximum flow deviation of each flow channel decreases from 20%to 2.4%,and the pressure drop decreases by 30%.Compared with the serpentine flow channel,the maximum temperature and maximum temperature difference of the optimized flow channel reduce by 2.22 and 1.12℃.

关 键 词：锂离子电池 单进双出并联流道 温度一致性 四置液冷板 结构优化 

分 类 号：TM912.9[电气工程—电力电子与电力传动]