Abstract: The application of blockchain technology in the new energy vehicle supply chain can to a certain extent solve the problems of low utilization rate and difficult recycling of waste power batteries. In this context, this paper considers the dynamic strategy for a new energy vehicle closed-loop supply chain consisting of one power battery supplier, one general component supplier and one manufacturer. In this system, blockchain technology is adopted to trace the lifecycle process management of the power battery. The stochastic evolution process of the traceability level is described to show the dynamic changes of the power battery. For the three cases that the power battery supplier and the manufacturer are respectively responsible for recycling products and the vertical integration of both parties is implemented, we construct the corresponding leader-follower stochastic differential game models. By solving the feedback equilibrium, we compare the state variables, decision variables and feedback profits of the three models when the system reaches the steady situation. Numerical examples are provided to conduct the performance of the supply chain in the unsteady-state and dynamic environments. These findings provide some guides for the new energy vehicle enterprises to adopt the blockchain technology, recycle the waste power batteries and integrate the supply chain.

Key words: closed-loop supply chain, new energy vehicle, differential game, blockchain technology