The rapid development of electric vehicles (EVs) requires the appropriate planning of EV charging stations. EV charging stations in a highway network are the guarantee for long distance driving. This paper studies the charging demand distribution in highway network and proposes a planning scheme by the two-step method. The first step is to determine the candidate stations considering the distance from highway entrance/exit to charging stations and EV mileage. The second step is to determine the optimal location and capacity of EV charging stations considering the charging demand

minimal construction cost

grid connection cost

operation and maintenance cost. A highway network containing six gateways and four intersections is proposed to select 90 candidate stations and build 24 optimal charging stations. The method proposed in this paper is able to meet all the objectives and the planning scheme varies with the state-of-charge expectation

and affecting factors between stations and quantity constraint of stations. This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2012AA050211) and National Natural Science Foundation of China (No. 51261130473).