Device and method of monitoring an electric battery in a submarine

The battery monitoring system has a central evaluation device (2) for continuous detection of individual cell voltages of individual battery cells. The evaluation device can monitor the individual cell voltages of all battery cells. It is connected to at least one sensor module (8) for detecting cell voltages and passing the acquired data to the evaluation device. An independent claim is also included for a method of monitoring an electric battery with several battery cells in a submarine.