Monitoring device which can be assembled for an electric energy storage device, electric energy storage device, and motor vehicle

A monitoring device for monitoring energy storage device components of an electric energy storage device has a regular arrangement of identically constructed circuit segments, from which at least one sub-arrangement can be separated with the number of circuit segments required for the electric energy storage device. The monitoring device additionally has a flexible circuit carrier with a plurality of identically constructed sections connected via separation points. Each circuit segment has a section, a monitoring unit for monitoring at least one energy storage device component, a contacting unit which is electrically connected to the monitoring unit and can be connected to the at least one energy storage device component, and a communication unit for transmitting an energy storage device component-specific monitoring signal between the monitoring unit and a controller of the electric energy storage device.