In the power supply assembly of electric vehicle

the capacitor is needed for filtering so to output appropriate voltage. Since the application condition of the vehicle is very complicated

the capacitor is required to keep long term

stable

safe and reliable operation under high and low temperature. The high temperature of the capacitor will speed up its insulation aging and performance variation and even lead to reliability reduction

therefore

the thermal simulation in the design and development of capacitor is of great importance. In this paper

the DC filter capacitor for certain type of electric vehicle is taken as an example

the model is set up by the sue of Solidworks 3D software and the ANASYS is taken as simulation tool to introduce the heating mechanism

heat conduction analysis and temperature rise test result of the capacitor. It is proved that the thermal simulation is more accurate.