关键词: 电动汽车, IGBT, 铜底板, 预弯弧度, 平面度

Abstract: 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 is 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 550 and 600 microns were measured by 3D profilometry and scanned by ultrasonic wave, respectively. The pre-bending height H values are 550-600 microns.

Key words: electric vehicle, IGBT, copper baseplate, pre-bending radian, flatness