The ornamental design for a chargingstation, as shown and described.
FIG. 1 is a front perspective view of a charging station;
FIG. 2 is a front view of the charging station;
FIG. 3 is a rear view of the charging station;
FIG. 4 is a right side view of the charging station;
FIG. 5 is a left side view of the charging station;
FIG. 6 is a top view of the charging station;
FIG. 7 is a bottom view of the charging station; and,
FIG. 8 is a rear perspective view of the charging station.
The broken lines shown in the drawings are included for the purpose of illustrating portions of the charging station which form no part of the claimed design.