System and method for guiding route of electric vehicle

A method of guiding an electric vehicle route of a system that searches for an optimal energy route of an electric vehicle, the method comprising steps of:

• determining, by a controller, a straight line distance from a departure point to a destination with reference to a roadmap, when a destination is input;
• calculating, by a route calculator, an energy-based link cost on a link basis on a route from a departure point to a destination using route search algorithm;
• calculating, by the route calculator, a time link cost based on a time weight function and a link running required time using the straight line distance from a departure point to a destination as a variable;
• calculating, by the route calculator, a compensation link cost by adding the time link cost in consideration of a running time on a corresponding link basis to the energy-based link cost on a link basis;
• and
• searching, by the route calculator, for a smallest route of added values of the compensation link costs from the departure point to the destination to determine the smallest route to the optimal energy route,

An electric vehicle route guide system that guides an optimal energy route using real time traffic information, the electric vehicle route guide system comprising:

• a location sensor that measures a current location of the electric vehicle;
• a roadmap storage having link information and node information for is providing a running route;
• a route calculator that searches for a route having a smallest total value of compensation link costs that are generated by adding a time link cost in consideration of a running time on a link basis according to real time traffic information to an energy-based link cost on each link basis from a departure point to a destination as an optimal energy route;
• a display that displays information for route guide of the optimal energy route;
• and
• a controller that controls operations of the location sensor, the roadmap storage, the route calculator, and the display for the search and route guide through a navigation program.