Patent ID: 8676484

Claim:
A charge point reachability determination system comprising: a center device including: a communication unit communicating with an electric vehicle, a memory unit storing road map information representing a road by using a link and a node, including node information of the node having a nearby charge point, wherein the node information is used for determining a required energy of the electric vehicle for reaching the nearby charge point from the node when the node has at least one nearby charge point, an energy determination unit determining the required energy, and a determination unit determining whether the nearby charge point is reachable by the electric vehicle; and an in-vehicle device disposed in the electric vehicle and including: a communication unit communicating with the communication unit of the center device, an in-vehicle obtainment determination unit obtaining vehicle information regarding the electric vehicle, and an information transmission unit transmitting the vehicle information to the center device via the communication unit, wherein the energy determination unit determines the required energy based on the node information and the vehicle information of the electric vehicle when the electric vehicle is positioned in proximity to the node that has the node information, and the determination unit determines whether the electric vehicle is able to reach the nearby charge point based on a comparison between the required energy determined by the energy determination unit and a remaining energy of the electric vehicle, which is an amount of energy that is available for driving the electric vehicle.