Battery pack, battery management system and method for operating a battery pack

Battery pack comprising at least one battery cell, in particular a pouch cell, arranged within a housing, and a sensor arrangement arranged between the battery cell and an abutting surface adjacent to the battery cell; wherein the sensor arrangement has a first carrier foil and a second carrier foil; wherein, in an operating state, the first carrier foil and the second carrier foil are spaced apart from one another by a spacer positioned in between the first carrier foil and the second carrier foil; wherein the spacer has a first recess defining an active area of the sensor arrangement, wherein a contact arrangement is arranged within the active area, said contact arrangement comprising at least a first electrode arranged on the first carrier foil and a second electrode arranged on the second carrier foil oppositely of the first electrode; wherein, in the operating state, the first electrode is spaced apart a first distance from the second electrode, and wherein, in a deformation state, a deformation of the battery cell is detected by a variation of an electrical property of the contact arrangement; characterized in that the sensor arrangement further comprises an elastic inlay arranged on the second carrier foil, wherein the inlay comprises a second recess accommodating an activator unit for transmitting a pressure force acting from the battery cell or the abutting surface to the active area; and wherein the activator unit is arranged on the second carrier foil and spaced apart a second distance from the battery cell or the abutting surface, such that, after a transition from the operating state in the deformation state, said pressure force is transmitted via the activator unit.