Device and Method for Monitoring the Temperature of an Electrical Energy Storage Unit

A device and method for monitoring the temperature of an energy storage unit having M subsets of P storage cells, where M≥1 and/or P≥1, is provided. The P storage cells are arranged electrically in parallel with one another, and the M subsets are arranged electrically in series. The device is configured to determine M measured values of the impedance of the corresponding M subsets of P storage cells and to monitor the temperature of the energy storage unit based on the M measured values of the impedance.