Safety device for a battery contactor in an electric vehicle

Abstract

The invention relates to a safety device () for a contactor () connected between a secondary battery and an electrical power network, in particular of a motor vehicle that can be driven electrically, comprising at least one electronic evaluating unit (), which can be connected to at least one electrical component of the secondary battery by means of a communication connection (), and at least one safety switch (), which can be controlled by means of the electronic evaluating unit () and which can be arranged in an electrical control circuit () of the contactor (), wherein the electronic evaluating unit () is designed to receive at least one component-specific piece of actual information () from the electrical component via the communication connection (), to compare the received piece of actual information () with at least one piece of target information stored in the electronic evaluating unit (), and to control the safety switch () in dependence on a result of the comparison in such a way that the electronic evaluating unit closes the safety switch () if the piece of actual information () corresponds with the piece of target information and opens the safety switch () if the piece of actual information () does not correspond with the piece of target information.