Influence factors and risk analysis of new energy vehicles from the perspective of system

Compared to fuel vehicles, new energy vehicles have the advantages of energy-saving and emission reduction and, hence, are widely accepted. As the policy has been withdrawn gradually, the development of new energy vehicles has slowed down. Under the double effect of positive factors, such as policy support and public opinion support and malpractice factors, this study explored the development status of new energy vehicles and the related problems. Based on the qualitative and quantitative perspective, the improved Lotka-Volterra model and the health assessment method are adopted, and the system dynamics, behavioral economics, and other methods are combined to establish the driving flow diagram of new energy vehicles to explore the source of the problem and the governance measures. The analysis results showed that the support strength of policy and public opinion decreases gradually. However, the primary factor restricting the development of new energy vehicles is still cost. Cadmium and chromium in the soil exceed the national heavy metal content standards of China, while the other five heavy metals in the analysis period did not exceed the national standards.