摘要
针对电动汽车动力电池能量密度逐渐上升及快充过程中电池发热量大的问题,本文提出采用蜂窝型单面吹胀铝板作为电池冷板的一种新型冷媒直冷电池热管理系统,充分利用制冷剂在流道内的高沸腾传热潜热处理动力电池热负荷。为了研究此冷媒直冷热管理系统的运行性能,构建了新型直冷系统的实验测试装置,并在UDDS标准工况下进行实验研究。测试结果表明:在6 kW下的最大设计发热量下,系统在150 s左右可快速响应热管理需求,具有较快的温度响应特性;电池冷板表面平均温度可控制在15~20℃的最佳温度区间,并达到温差小于4℃的良好均温性,且系统COP稳定在2.8以上。
A direct refrigerant battery cooling system is proposed in this study in order to derive an approach to face the rising energy density and solve the thermal dissipation of batteries during the fast-charge or over-charge process.A novel honeycomb shaped single-sided roll-bond aluminum sheet was designed and introduced under a power battery to serve as a cooling plate.Refrigerant is boiled in the novel channel and the latent heat of vaporization is utilized to satisfy the thermal management demand of the power battery in the direct refrigerant battery cooling system.A silicon rubber heating board was used to simulate the thermal demand of the power battery module according to the state of charge data of the power battery.An experimental bench was built to test the performance of the system under the environmental temperature of the UDDS condition.The experimental results show that the system can respond to the thermal management requirements quickly in approximately 150 seconds under the maximum heat generation,i.e.,6 kW,which shows fast response characteristics.The average temperature of the surface of the cooling plates can be controlled between the appropriate temperature range of 15 to 20℃and meet the temperature uniformity requirement of 4℃under the given conditions.At the same time,the COP of the system is above 2.8 under the given conditions.
作者
聂磊
王敏弛
赵耀
葛天舒
代彦军
Nie Lei;Wang Minchi;Zhao Yao;Ge Tianshu;Dai Yanjun(Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai, 200240, China)
出处
《制冷学报》
CAS
CSCD
北大核心
2020年第4期52-58,共7页
Journal of Refrigeration
关键词
电池热管理
直冷系统
冷板设计
实验研究
battery thermal management
direct cooling system
cooling plate design
experimental research
