Sensor device for a cell, battery element and sensor system for a multi-cell electric energy storage, and method of communication for a sensor device

It is proposed a sensor device (130) for a cell (102) of a multi-cellular electrical energy accumulator (100). The sensor device (130) as a part of a sensor system (110) having at least one further sensor means (130) and a control unit (120) is arranged. The sensor device (130) has a receiving means (132) for receiving a communication signal from the control unit (120) or a further sensor device (130) via a first power supply line of the cell (102). Furthermore, the sensor device (130) to a memory means (134) for temporarily storing represented by the communication signal communication data. The sensor device (130) also includes a detecting means for detecting sensor data with regard to the cell (102) of the electrical energy accumulator (100). In addition, the sensor device (130) control means (136) for varying the communication data in the storage device (134) depending on the sensor data. The sensor device (130) also comprises a transmitting means (138) for transmitting a communication signal, which represents the communication data of the storage means (134) to the control unit (120) or a further sensor device (130) via a second power supply line of the cell (102) ,