The market penetration rate of new energy vehicles is increasing, and energy supplementation has become a new challenge. The battery swapping model has been gradually promoted for its two advantages of cost reduction and efficient energy supplementation. In the early stage of the battery swapping market, consumers can choose the model of " buying-out battery pack one-time " or the model of " leasing battery pack". This study first considers the policy impact of government-imposed subsidies and compares the effects of different subsidies on product pricing, market demand and corporate profits. Then, we study the influence of corporate initiatives for corporate social responsibility (CSR) on consumer choice in the market. Further, a contract is established to coordinate the supply chain firms and find a good contract to enhance the supply chain performance. Finally, we extend the model to explore the effect of mixed subsidies. We show that:1)When the government provides battery swapping operation subsidies, the performance improvement of supply chain members is higher than the performance improvement when it provides R&D subsidy; 2) Battery swapping operators undertaking CSR input can enhance the performance of the supply chain. When government subsidy and enterprise CSR coexist, it has the highest efficiency in improving supply chain performance; 3) Establishing a cost-profit sharing contract to coordinate supply chain members to achieve Pareto improvement.