Robot assisted modular battery interchanging system

A portable exchange robot for exchanging a battery module in a vehicle, said robot comprising:

• a microprocessor;
• a battery tray configured to hold a modular battery unit;
• a lift in mechanical communication with said battery tray, said lift to raise and lower said battery tray;
• a motor in mechanical communication with said lift and in electrical communication with said microprocessor, said motor to raise and lower said lift;
• a plurality of wheels that propel said portable exchange robot;
• a navigation system in electrical communication with said microprocessor and at least one of said plurality of wheels to drive the dispensary robot between a modular battery dispensary and a vehicle;
• a memory in electrical communication with said microprocessor, said memory storing instructions for:
• positioning said robot under said modular battery in said vehicle;
• unloading a depleted battery module from said modular battery in said vehicle, wherein said instructions for unloading said depleted battery further comprise:
• raising said battery tray to engage said depleted battery module;
• monitoring a weight on said battery tray during said raising, said weight sensed by a weight sensor on or proximal to said battery tray;
• stopping said raising when said monitored weight reaches a threshold value;
• and
• after said stopping, sending a message to said vehicle that said battery tray has engaged said depleted battery module;
• and
• returning said depleted battery module to said modular battery dispensary;
• and
• a wireless communication system operable to be in electrical communication with said modular battery dispensary and said vehicle.