NOVELTY - The electrode stack (12) comprises electrodes (20,22) between which a separator (24) is arranged. Both the electrodes are formed with respective openings and active layer regions. The openings (34,36) of separators are formed smaller than that of the openings of electrodes (20). The areas freed from the active layer region of electrode (20) are connected electrically through the openings of electrodes (22) and the separators, and the areas freed from the active layer region of electrodes (22) are connected electrically through the openings of electrodes (20) and the separators.    USE - Electrode stack for energy storage cell such as electrochemical energy storage cell e.g. lithium ion cell used in energy storage device such as electrochemical energy storage device (all claimed) e.g. lithium ion battery mounted in motor vehicles. Can also be used in primary or secondary cell, fuel cell, or high-performance capacitor.    ADVANTAGE - An improved electrode stack used for electrical contacting of other electrode stack is provided. Only a relatively small area is required for welded-current discharge. The stack of energy storage cells can be constructed with a high cell capacity. An additional terminal design in the electrode stack is not necessary, so that cost of the material for electrode stack can be reduced and manufacture of electrode stack and energy storage cell can be simplified. The reliability of energy storage cell can be increased, and the electrode stack can be better protected against damaging external influences. Short-circuit between electrodes can be prevented.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a manufacturing method of electrode stack; and    (2) a manufacturing method of energy storage cell.    DESCRIPTION OF DRAWING(S) - The drawings show a schematic view of the energy storage cell, and a schematic sectional view of the electrode stack.    Energy storage cell (10)    Electrode stack (12)    Electrodes (20,22)    Separator (24)    Openings (34,36)