Control method for controlling delivery system

A delivery system having a computer, the delivery system comprising:

• a plurality of autonomously-moving-type delivery vehicles each including a chargeable and dischargeable battery with a connector for electrical connection to another battery and configured to deliver an article to a delivery destination by electric power the chargeable and dischargeable battery is charged with, each of the plurality of autonomously-moving-type delivery vehicles having a central processing unit, the central processing unit for each of the plurality of autonomously-moving-type delivery vehicles configured to:
• acquire a respective delivery route for delivering the article;
• acquire, from the chargeable and dischargeable battery, information about a remaining amount of charge of the chargeable and dischargeable battery;
• calculate, based on the respective delivery route and the information about the remaining amount of charge of the chargeable and dischargeable battery as acquired, a surplus or shortfall in the remaining amount of charge of the chargeable and dischargeable battery required for traveling along the respective delivery route;
• and
• a transportation vehicle having a second central processing unit and an unloading mechanism coupled thereto that is configured to move between a closed position and an opened position, the transportation vehicle is configured to carry and transport the plurality of the delivery vehicles, the transportation vehicle includes an obstacle sensor configured to detect an obstacle ahead of the transportation vehicle in a traveling direction thereof, an acceleration sensor configured to detect an acceleration of the transportation vehicle and detect vibrations of the transportation vehicle caused by irregularities on the road surface, a speed sensor configured to detect a speed of the transportation vehicle, and a posture sensor configured to detect a gradient of the road on which the transportation vehicle is traveling, the unloading mechanism is configured to unload each of the plurality of autonomously-moving-type delivery vehicles when in the opened positioned by being a slope extending from the inside of the transportation vehicle to a ground surface, the second central processing unit controls the unloading mechanism between the open position and the closed position,
• the computer configured to:
• determine the respective delivery route for delivering the article from a place where the transportation vehicle is currently present to the delivery destination based on map information, the map information including road-surface information,
• calculate, for each of the plurality of the delivery vehicles, based on the respective route for delivering the article and the respective remaining amount of charge of the chargeable and dischargeable battery, the surplus or shortfall in the remaining amount of charge of the chargeable and dischargeable battery required for traveling along the respective route, and
• supply, based on the result of the calculation of the surplus or shortfall in the remaining amount of charge of the chargeable and dischargeable battery for each of the plurality of the delivery vehicles, surplus electric power from, among the plurality of the delivery vehicles, the chargeable and dischargeable battery of a first delivery vehicle having a surplus remaining amount of charge to the chargeable and dischargeable battery of a second delivery vehicle having a shortfall in the remaining amount of charge by electrically coupling the connector of the first delivery vehicle to the connector of the second delivery vehicle through autonomous driving.