Energy storage device

An energy storage device comprising:

• at least one energy storage module stacked in a first direction;
• and
• a case that houses the at least one energy storage module, wherein:
• each of the at least one energy storage module includes
• a plurality of electrode sheets stacked in the first direction and including a bipolar electrode sheet, and
• a sealant disposed at a periphery of the electrode sheets and sealing an electrolyte between the electrode sheets;
• the bipolar electrode sheet includes a current collector foil, a cathode active material layer provided on one surface of the current collector foil, and an anode active material layer provided on another surface of the current collector foil;
• each of end faces of the energy storage module in the first direction includes an electrode-facing region and a non-electrode-facing region, the electrode-facing region facing either or both of the cathode active material layer and the anode active material layer when viewed in the first direction, and the non-electrode-facing region being located outward of the electrode-facing region and inward of the sealant when viewed in the first direction;
• and
• in each of the end faces of the energy storage module in the first direction, at least part of the non-electrode-facing region is bonded to another adjacent energy storage module or the case via an adhesive.