Reliability Analysis of DC Charging Pile Based on Fault Tree

With the rapid development of the electric vehicle industry, as one of its supporting facilities, DC charging piles have been more and more widely used. And the working status of DC charging piles is becoming more and more important. According to the reliability problems of DC charging piles, in this paper, we first put forward several indicators which can describe the reliability of DC charging piles, and then we explain the hardware system structure of DC charging piles, at the same time we analyse the failure rate of each modules by using the method of fault tree, and acquire the system availability by using the state space method, so the influence of failure rate on module raliability is analyzed comprehensively by using the two methods. Finally we put forward the corresponding improvement measures.