The invention relates to an energy storage module. The energy storage module includes a plurality of energy storage cells, where each of the plurality of energy storage cells is connected electrically. The energy storage module further includes a housing having a portion that receives the plurality of energy storage cells, a measurement line integrated into the housing, and a barrier layer arranged between the housing and the plurality of energy storage cells. The barrier layer is at least in the portion of the housing and is impermeable to gases and liquids. An energy storage system and a method for continuously producing energy storage modules are also described.