US Patent 11682915 Charge coupler and method for autonomously charging vehicle batteries

A system for charging a battery carried by a vehicle may include a charging box for coupling to a vehicle chassis and including interface electrical contacts electrically coupled to the battery. The system may also include a charge coupler including coupler electrical contacts for electrically coupling to the interface electrical contacts from under the vehicle and configured to be coupled to an electrical power supply. The charging box may include an interface activation surface, and the charge coupler may include a housing for enclosing the coupler electrical contacts and including a base for supporting the coupler electrical contacts, a coupler activation surface opposite the base, an opening, and a door configured to open the opening to expose the coupler electrical contacts as the interface activation surface contacts the coupler activation surface and moves the coupler activation surface toward the base.