关键词: 电驱动总成；外观检查；电学性能；气密率检测；残余扭矩；接合面

Abstract: In order to accurately evaluate the performance of electric vehicle drive motor assembly, the post-test inspection technology is discussed. Taking three-in-one electric drive assembly as the object of discussion, the methods of system appearance and detail inspection, electrical performance test, airtight performance test and residual torque measurement of mechanical connection screw are emphatically introduced. The inspection specification is to first confirm the overall appearance and interface details of key components, then test the assembly insulation resistance and direct current voltage resistance and ground resistance parameters, then test the pressure leakage rate of the oil circuit of the whole machine, the motor drying chamber and the pressure regulator vent valve film, and finally test the residual torque of the fastening screw during mechanical disassembly, and test the electrical parameters of the fixed rotor, and component joint surface and functional parts appearance inspection, etc. According to relevant test standards, the applicable inspection process and method are summarized, which provides strong support for the test development and verification of electric drive assembly.

Key words: Electric drive assembly; Visual inspection; Electrical performance; Airtight rate test; Residual torque; Connecting interface