动力电池模组热管流道变结构研究

Research on variable structure of heat pipe flow channel of power battery module

针对电动汽车动力电池对温度变化敏感所导致的使用性能衰减、续航里程不足的问题,研究了冷却板热管流道结构对动力电池模组温度及一致性的影响。提出采用变结构热管流道设计,对电池模组温度进行有效控制。根据冷却板和热管流道结构布置及温控要求,针对新型热管流道变结构,建立电池模组液冷散热有限元模型,得出在3 C放电倍率下流道变结构对电池模组温度场的影响规律。通过FLUENT仿真分析,结果表明采用新型流道变结构冷却板比传统流道结构冷却板对动力电池模组的冷却效果更好,其中90°S型流道变结构可以使动力电池模组的最高温度降低0.56 K,光滑弯曲流道变结构可以使动力电池之间的温差降低0.36 K。

In order to solve the problems of attenuation of performance and insufficient range caused by the sensitivity of electric vehicle power battery to temperature change,this paper analyzed the influence of the structure of cooling plate heat pipe runner on the temperature and consistency of power battery module.The variable structure heat pipe runner design was proposed to effectively control the temperature of the battery module.According to the structure arrangement and temperature control requirements of cooling plate and heat pipe runner,the finite element model of liquid cooling heat dissipation of battery module was established for the new heat pipe runner variation structure,and the influence rule of flow channel variation structure on the temperature field of battery module under 3 C discharge rate was obtained.By FLUENT software simulation analysis,the results show that the new port variable structure compared with the conventional flow cooling plate structure surface cooling power battery module,the cooling effect is better,of which 900 S port variable structure can reduce power battery module,the highest temperature of 0.56 K,smooth bend flow variable structure can reduce the temperature difference between power battery 0.36 K.