Abstract: Battery charging and swapping stations（BCSSs）for electric vehicles has become an important infrastructure contributing to the development and spread of electric vehicles in China.The cost-benefit model of BCSS is crucial for its commercialization.In this paper,the battery lease mode is chosen as the operation mode of the BCSS.On the grounds of the chosen mode,the cost-benefit model of the BCSS based on the time-varying economic assessment index including net present value is built that considers the whole capital costs,the maintenance and operation fees,employee wages and service returns from swap and charging.Finally,with a BCSS based on leased mode in China as an example,the whole life cycle cost-benefit model is presented and the key elements affecting the station’s revenue are found through a sensitivity analysis.The sequence of sensitivity elements is as follows:the battery swapping price,lease rental of batteries,electricity price,and so on.The model of BCSS and its sensitivity analysis has provided a basis for cost-benefit assessment and decision marking for commercial operation of BCSS of electric vehicles.