In order to provide a cell contact-making system for an electrochemical device which includes a plurality of electrochemical cells, wherein the cell contact-making system includes a current conductor system having one or more cell connectors, for electrically conductively connecting cell terminals of different electrochemical cells, a signal conductor system having one or more signal conductors for electrically conductively connecting a respective signal source to a signal conductor terminal connector of the cell contact-making system, and a monitoring unit for monitoring signals from the signal sources, which is of compact construction and is assemblable from a relatively small number of parts, it is proposed that the monitoring unit should include a plug contact terminal connector which is directly connectable by a plug connection to the signal conductor terminal connector of the signal conductor system.