燃料电池轿车用PCU水冷装置的设计与试验

Design and Experiment of Water-Cooling Device for Fuel Cell Vehicle

摘要:

提出了一种燃料电池轿车用DC/DC,DC/AC集成系统动力控制单元(PCU)的高效低阻水冷装置的设计方法.根据强化传热原理,将发热元件贴在水冷装置上,热量传导到装置内部,再由对流换热传递给冷却水带出到外部冷却设备进行散热.采用加菱形肋柱强化散热的设计思路,增加散热面积,同时由于肋柱使流道面积减小,冷却液流速增大,能有效地提高PCU的工作效率、增加工作寿命、改善工作条件.最后建立了试验测试平台进行验证.

Abstract:

The paper presents a special design of water-cooling device for power control unit(PCU),a combination of DC/DC,DC/AC,which is characterized by its high efficiency and low resistance.According to the principle of heat transfer enhancement,the heat will be conducted to the inside of the water-cooling device by pasting up the water-cooling device with the heating component,and then be transferred to the outer cooling system through convection with the coolant.The design to adopt the rhombus ribs enlarges the heating area,and increases the velocity of coolant due to the decrease of the flow tunnel area.As a result,the efficiency of PCU and the working condition are improved,and the service life is prolonged.A test platform is established and validates the design.