Charging robot equipped with safety controller and electric vehicle charging system including the same

An electric vehicle charging system comprising:

• a charger coupled to a charging port of an electric vehicle and configured to charge the electric vehicle;
• a charging robot configured to grip the charger;
• and
• a detection device configured to detect an external object that approaches a periphery of the charging robot;
• wherein the charging robot comprises:
• a robot body;
• an articulated robot arm connected to the robot body and configured to be rotatable about a reference axis;
• and
• a safety controller configured to determine a risk degree related to an operation of the robot arm based on a distance between the reference axis of the robot body and the external object and control the operation of the robot arm based on the risk degree;
• wherein the safety controller is configured to score the risk degree as a first risk score within a range from 0 to a first reference value in accordance with the distance between the reference axis and the external object, and to control the operation of the robot arm based on the first risk score.