A comparative study on durability characteristic of ECU for automobile by configuration through thermal analysis

The application of integrated ECU for automobile today holds an advantage in the quality. This study is to obtain the data of ECU with higher durability when releasing heat. Each ECU model is designed with the CATIA program by referring to ECU installed in automobile and we have performed the thermal analyses for a total of three simulation ECU models in this study. The boundary conditions applied to analysis models are identical and we have applied a room temperature of 22℃ on the packaging of ECU models and a temperature of 120℃ for the face touching the chip. According to the study results, ECU model 2 showed the highest level of durability for every analysis excluding temperature contour result compared to ECU model 1 and model 3 by performing the thermal analysis. In other words, Model 2 can be considered to be used for the longest period of time under the effect of consistent heat. The heat density has greatly increased from the miniaturization and weight lightening of electronic equipment comparing results of heat transfer, heat flux, transient heat transfer, and thermal stress analysis. On the other hand, it is thought that the effect of thermal emission has been worsened through miniaturization. The generation of heat within the ECU greatly affects the durability of the ECU, so it is very important to perform the research and development for cooling technology. An ECU with an enhanced function must be applied through the thorough research. Also, it is possible to find an ideal material that is more durable in order to high temperature and emit heat more easily. The strength characteristics of each ECU model can be investigated by applying this result. It is thought that this study can contribute to improving ECU with the better durability.