| 摘要 |
PROBLEM TO BE SOLVED: To provide a navigation device capable of calculating a more accurate threshold value of electric energy.SOLUTION: A navigation device comprises: a present position detection section 5 to detect a present position of an own vehicle; an external signal input section 10 to acquire electric energy consumed by the own vehicle and a vehicle signal indicating usage of an electric components mounted on the own vehicle; a map information storage section 71 to store, for each predetermined map zone, map information including data on a chargeable area which is data indicating a distance range having a possibility that a facility capable of charging the own vehicle exists and is set on the basis of at least one or more piece of information of date information and presence/absence information on a facility card required to use the predetermined charging facility; an electricity consumption calculation section to calculate electricity consumption of the own vehicle on the basis of a travel distance thereof, the electric energy, the vehicle signal and a travel history; and an electric energy threshold value calculation section to calculate an electric energy threshold value on the basis of the electricity consumption and the chargeable area. |
