The invention discloses a safe and reliable storage battery car charging interface. The charging interface comprises a plug, a socket, movable columns, first
metal sleeves, second
metal sleeves, springs and insulation sheets, the left side of the socket is provided with an inserting port, the plug is inserted into the inserting port, a bottom wall of the inserting port is provided with three through holes, the movable columns are inserted into the through holes, the three first
metal sleeves arranged in a
traverse manner are arranged in the socket, the first metal sleeves are cylindrical structures whose left sides are open and right sides are sealed, each first metal sleeve corresponds to one through hole, the through hole is connected with the first metal sleeve, the internal
diameter ofthe through hole and the internal
diameter of the first metal sleeve are the same, one insulation sheet is fixed at the inner side of the right sidewall of each first metal sleeve, the spring arranged in a
traverse manner is fixed on the insulation sheet, and the other end of the spring is connected with the movable column. According to the charging interface,
electrical connection between the movable columns and a storage battery is avoided when the plug is not inserted into the socket through cooperation of the movable columns and the spring, and the charging interface is safe and reliable.