The ornamental design for a chargingstation for an electric vehicle, as shown and described.
1.1is a front view;
1.2is a rear view;
1.3is a front side perspective view; and
1.4is a side view.
2.1is a front side perspective view;
2.2is a rear view;
2.3is a side view; and
2.4is a front view.
In the drawings, the broken lines are for the purpose of illustrating portions of the charging station for an electric vehicle that forms no part of the claimed design.