基于双置直冷板技术的动力电池热管理系统性能研究  

Research on performance of thermal management system of power battery based on double direct cooling plate technology

作　　者：赵金辉[1] 姜冰[1] 钱鑫鑫 孔清杰 Zhao Jinhui;Jiang Bing;Qian Xinxin;Kong Qingjie(School of Mechanical and Power Engineering Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001

出　　处：《低温工程》2023年第6期50-57,共8页Cryogenics

基　　金：中国工程院推进能源生产和消费革命(2035,三期)战略研究子课题六能源革命推动中部地区崛起(2018-ZD-06)。

摘　　要：针对锂电池在大倍率充放电工况下热量堆积问题,提出了双置直冷板冷却方案。设计了4流程双置直冷板系统,建立了基于混合物多相流的电池散热模型,研究了在5C放电倍率下模组温度分布情况,对比了单直冷板和双置直冷板的热管理效果,并分析了制冷剂入口流量变化对双置直冷板技术的性能影响。结果表明,单直冷板系统在高倍率放电工况下冷却性能较差,放电结束最高温度达40.37℃,最大温差达11.4℃;双置直冷板电池模组最高温度为27.05℃,最不利电池的纵向温差为4.65℃,对比单直冷板,最高温度下降了32.99%,最不利电池的纵向温差降低了61.36%,双置直冷板技术可有效提高温度均匀性,降低了电池运行风险。此外,对于上下双置直冷板模式的电池模组,直冷板制冷剂入口流量不应小于0.5 L/min。In order to solve the heat accumulation problem of lithium battery under high rate charge and discharge condition,a cooling scheme of double straight cooling plate was proposed.A four-flow double cooling plate system was designed,and a battery cooling model based on Mixture model was established.The temperature distribution of the module at 5C discharge rate was stud-ied,the thermal management effect of single and double cooling plate was compared,and the effect of refrigerant inlet flow on the performance of double cooling plate technology was analyzed.The results show that the cooling performance of the single straight cooling plate system is poor un-der the condition of high rate discharge.The maximum temperature at the end of discharge is 40.37℃,and the maximum temperature difference is 11.4℃.The maximum temperature of the double straight cooling plate battery module is 27.05℃,and the longitudinal temperature differ-ence of the most unfavorable battery is 4.65℃.Compared with the single straight cooling plate,the maximum temperature is reduced by 32.99%,and the longitudinal temperature difference of the most unfavorable battery is reduced by 61.36%.The double straight cooling plate technology can effectively improve the temperature uniformity and reduce the risk of battery operation.More-over,for double straight cooling plate battery module,the refrigerant inlet flow should not be less than 0.5 L/min.

关 键 词：锂电池 制冷剂直冷 直冷板 高倍率 

分 类 号：TB657.5[一般工业技术—制冷工程]