NOVELTY - Stack type battery comprises a stacked electrode assembly (10) comprising many positive electrode plates (1) with respective positive electrode current collector tabs (11) protruding from it, many negative electrode plates (2) with respective negative electrode current collector tabs protruding from it, and separators interposed between the positive and negative electrode plates, where the positive and negative electrode plates are alternately stacked across the separator and the separators adjacent to each other in a stacking direction has a bonded portion (11).    USE - The stack type battery is useful as power source in high-power applications e.g. robots, electric vehicles and backup power.    ADVANTAGE - The stack type battery: has high capacity and uniformize distribution of electrolyte solution in stacked electrode assembly; is easy to place in horizontal orientation, thus achieving easiest way to retain battery stability and improved electrolyte permeation; prevents contacting of lead tabs and ground surface, thus preventing short circuiting; and provides bonding of separators easily at low cost.    DETAILED DESCRIPTION - Stack type battery comprises a stacked electrode assembly (10) comprising many positive electrode plates (1) with respective positive electrode current collector tabs (11) protruding from it, many negative electrode plates (2) with respective negative electrode current collector tabs protruding from it, and separators interposed between the positive and negative electrode plates, where the electrode plates are alternately stacked one another across the separators. Each one of pairs of the separators adjacent to each other in a stacking direction has a bonded portion (11) in which the adjacent separators are bonded to each other in at least a portion which is a perimeter portion and the proportion of the bonded portion of the separator located in a stacking direction-wise central region of the stacked electrode assembly is smaller than the proportion of the bonded portion of the separator located in both stacking direction-wise end portions of the stacked electrode assembly.    DESCRIPTION OF DRAWING(S) - The figure shows an exploded perspective view of the stacked electrode assembly used in the stack type battery.    Positive electrode plate (1)    Negative electrode plate (2)    Bonded portions (4)    Stacked electrode assembly (10)    Positive electrode current collector tabs (11)