Electrical storage apparatus

An electricity storage device comprising:

• an electrode assembly including a plurality of primary electrodes and a plurality of secondary electrodes, wherein the primary electrodes and the secondary electrodes are layered alternately in a lamination direction, the primary electrodes are insulated from the secondary electrodes, and each of the primary electrodes and the secondary electrodes includes metal foil and an active material layer that is located on at least one surface of the metal foil;
• a case that accommodates electrolyte solution and the electrode assembly and includes a wall that includes an inlet for the electrolyte solution;
• and
• an insulator that is located in the case and insulates the electrode assembly from the case, wherein
• the electrode assembly includes a facing surface that faces the wall of the case,
• at least some of the primary electrodes each include a primary tab that projects from one edge of the primary electrode to take out electricity from the primary electrode,
• at least some of the secondary electrodes each include a secondary tab that projects from one edge of the secondary electrode to take out electricity from the secondary electrode,
• the primary tabs are collected in the lamination direction to form a primary tab group on the facing surface of the electrode assembly,
• the secondary tabs are collected in the lamination direction to form a secondary tab group on the facing surface of the electrode assembly,
• the primary tab group and the secondary tab group each include a first side and a second side opposite to the first side,
• the primary tab group and the secondary tab group are spaced apart from each other in a direction that extends perpendicular to the lamination direction and along the facing surface of the electrode assembly,
• each of the primary tab group and the secondary tab group is bent such that the first side faces the facing surface of the electrode assembly and the second side faces the wall of the case,
• the insulator exposes the entire facing surface of the electrode assembly to an outside of the insulator,
• the inlet is located at a position between regions of the wall onto which the primary tab group and the secondary tab group are projected when the wall is viewed in a direction perpendicular to the facing surface of the electrode assembly, the electrode assembly includes two surfaces that are perpendicular to the facing surface and differ from two end surfaces in the lamination direction of the electrode assembly,
• the insulator includes a covering section that covers at least one of the two surfaces of the electrode assembly, and
• the covering section extends beyond the facing surface of the electrode assembly in a direction perpendicular to the facing surface.