基于动态交通信息的电动汽车荷电状态估算研究

ccurate estimation of electric vehicle's SOC can provide decision making basis for driver's charging demand judgment, charging stations selection and route choice, and then promote the use of electric vehicles. First, the paper analyzes the impact of the Vehicle Specific Power (VSP) on electric vehicle energy consumption based on the data collected by the chassis dynamometer test. The relationship between average speed and energy consumption is discussed based on the distribution of VSP under specific average speed, a mesoscopic traffic state parameter which can easily obtained. Second, on the basis of the existing research, this paper presents a model of the relationship between the terminal voltage and SOC by fitting experimental data to analyze energy consumption characteristics along with different SOC and accurately estimate battery power under specific SOC. Then, electric vehicle's SOC estimation algorithm is proposed based on dynamic traffic information. Finally, electric vehicle's SOC at destination is estimated based on different SOC at origin by the example of Beijing road network.