In view of the electric vehicle high-voltage relay adhesion failure phenomenon, Fault Tree Analysis (FTA) is used to perform the relevant reliability analysis. By analyzing the electrical system in which the high-voltage relay is located, a relay Adhesion failure fault tree model is built to analyze it qualitatively and quantitatively. Finally, the minimum cut set of the fault tree and the top event failure probability are solved, and the weak links causing the adhesion failure are identified based on the importance analysis.

High voltage relays  /  Adhesion failure  /  Fault Tree Analysis (FTA)