电动汽车用IGBT模块铜底板设计

Copper Baseplate Design of IGBT Module for Electric Vehicles

对电动汽车用绝缘栅双极性晶体管(IGBT)模块铜底板进行预弯设计,使其具有一定的弧度,以抵消铜底板在焊接时的变形,保证铜底板与散热器之间的接触面平面度,进而保证散热量。通过加工9组不同预弯高度H值的铜底板进行焊接实验和安装扭矩模拟试验,并分别对铜底板预弯高度H值为550μm、600μm的IGBT模块进行3D轮廓测量和超声波扫描,最终设定预弯高度H值为550~600μm。

In order to offset the deformation of the copper baseplate during soldering,to ensure the flatness of the contact surface between the copper base plate and the heat sink,and to ensure the heat dissipation,the copper baseplate of IGBT module for electric vehicle was pre-bent to make it have a certain radian.The solering experiments and installation torque simulation experiments were carried out on nine groups of copper baseplate with different pre-bending height H values.The IGBT modules with pre-bending height H of 550μm and 600μm microns were measured by 3D profilometry and scanned by ultrasonic wave,respectively.The pre-bending height H values are 550~600μm.