Hybrid-electric and all-electric aircraft power systems

An on-ground service system, comprising:

• an aircraft including:
• an electric energy module;
• a connector module operatively connected to the electric energy module, the connector module being:
• structured to attach the electric energy module to the aircraft when the connector module is in an engaged mode while in use;
• and operable between the engaged mode and a disengaged mode, with the connector module disengaging the electric energy module from the aircraft in the disengage mode;
• and
• an electrically-powered system,
• wherein:
• the electric energy module is attached to the aircraft via the connector module and is electrically connected to the electrically-powered system;
• the electric energy module is electrically connected to the electrically-powered system via the connector module;
• the connector module is structured to electrically disconnect the electric energy module from the electrically-powered system when the connector module is operated from the engaged mode to the disengaged mode;
• the electric energy module is positioned relative to the aircraft such that when the connector module is in the disengaged mode and the aircraft is stationary on a ground, gravity acts on the electric energy module to move the electric energy module toward the ground;
• the electric energy module comprises an electrical connector on a side of the electric energy module that faces toward the ground when the aircraft is stationary on the ground;
• the electrical connector is electrically connected to the electric energy module;
• and
• the electrical connector is sized to charge the electric energy module when connected to an electric power source;
• and
• a ground vehicle that includes an electrical connector structured to electrically connect to the electrical connector of the electrical energy module when the aircraft is stationary on the ground,
• wherein:
• the electrical energy module comprises a support structure that is structured to support a weight of the electrical energy module;
• and
• the ground vehicle further comprises a movable structure, the movable structure being structured to move relative to a rest of the ground vehicle to engage the support structure and to remove the electrical energy module from the aircraft while engaged to the support structure.