BATTERY ENERGY STORAGE SYSTEM AND A METHOD OF ELECTRICALLY ISOLATING A PLURALITY OF BATTERY CELLS

Battery energy storage system and methods for electrically isolating a plurality of battery cells from an interface port are disclosed. In one example, a method comprises measuring an electrical parameter on a DC bus to which the plurality of battery cells are electrically coupled. An individual battery cell electrical parameter is determined using the electrical parameter and a quantity of the battery cells. Based at least on comparing the individual battery cell electrical parameter to a predefined threshold, the plurality of battery cells are electrically isolated from the interface port.