METHOD FOR MONITORING THE STATUS OF A PLURALITY OF BATTERY CELLS IN AN ENERGY STORAGE SYSTEM

A method for monitoring a status of an energy storage system connected to a power converter is disclosed. The energy storage system comprises a plurality of interconnected energy storage cells, and the power converter is configured to output power from the energy storage system to a power transmission system and to charge the energy storage system with power from the power transmission system. The method comprises generating, by the power converter, an electrical signal injected into the energy storage system, measuring a response signal generated in response to the injected electrical signal, and determining a status of the energy storage system based on the received response signal.