动力电池液冷板换热技术研究现状

Research status of heat transfer technology of liquid cooling plate of power battery

动力电池液冷换热技术目前发展较为成熟,其中液冷板换热是常见的液冷换热形式,直接影响着动力电池的换热性能。分析了液冷板换热技术发展脉络,结合其换热原理,从液冷板结构、流道尺寸优化、冷却液介质及液冷板制造工艺分析了动力电池液冷板换热技术的研究现状。研究发现:新型结构型式液冷板的换热性能高,但其结构复杂,制造难度大;液冷板流道尺寸优化可提高换热效率并节省系统能耗;乙二醇溶液是目前常见的冷却液介质,一些高性能新能源车采用纳米流体冷却液;采用冲压、钎焊工艺制造的液冷板广泛应用于新能源汽车。

At present,the liquid cooling heat exchange technology of power battery is mature,and the liquid cooling plate heat exchange is a common liquid cooling heat exchange type,which directly affects the heat exchange performance of power battery.The development of liquid cooling plate heat exchange technology was analyzed,and based on its heat exchange principle,the research status of the liquid cooling plate heat exchange technology of power battery was analyzed from four aspects,including the structure type of liquid cooling plate,optimization of flow channel size,coolant medium and manufacturing technology of liquid cooling plate.It’s found that the new type of liquid cooling plate has high heat transfer performance,but its complex structure makes it difficult to manufacture.The optimization of flow channel size of liquid cooling plate can improve the heat exchange efficiency and save the system energy consumption.The ethylene glycol solution is a common coolant medium at present,and some high-performance new energy vehicles use nano-fluid coolant.The liquid cooling plate manufactured by stamping and brazing technology is widely used for new energy vehicles.