Abstract: A method for a treatment of fault currents in a high-voltage battery connected to a charging station via a charging circuit in a motor vehicle is presented. An electric protective-conductor connection is established between a protective conductor on the charging station side and a protective conductor on the battery side, which is electrically insulated to the first high-voltage potential on the battery side and the second high-voltage potential on the battery side to connect the protective conductor on the battery side via the protective conductor on the charging station side to a ground potential on the charging station side for the high-voltage battery. Upon a fault condition, a fault current circuit forms via the charging station and the protective-conductor connection with a fault current supplied from the high-voltage battery. The fault current is reduced and/or limited by a fault current controller of the charging circuit for a predetermined minimum duration.