NOVELTY - A stack-type lithium-ion polymer battery comprises cathode (11), anode (12), a separator, and a gel electrolyte, where an electrode stack (23) in which the cathode and the anode are stacked through the separator is enclosed and fixed by an insulating porous sheet, and is packaged with a laminate material.    USE - As stack-type lithium-ion polymer battery (claimed).    ADVANTAGE - The stack-type lithium-ion polymer battery, which had a very high workability, high capacity and low internal short-circuit fault ratio, was obtained.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for producing a lithium-ion battery, involving forming a cathode comprising a cathode current collector and a cathode active material partially coated on the cathode current collector such that the cathode current collector has both a coated and an uncoated portion on it; forming an anode comprising an anode current collector and an anode active material partially coated on the anode current collector such that the anode current collector has both a coated and an uncoated portion on it; forming a stack body comprising the cathode, the anode and a separator between the cathode and the anode; enclosing the stack body with an insulating porous sheet, and fusion-bonding the insulating porous sheet at a fusion-bonding portion, leaving an unfusion-bonding portion for injection of an electrolyte solution, such that the cathode and the anode are fixed by the separator and the insulating porous sheet, where obtaining an electrode group; enclosing the electrode group with a package, and sealing by fusion, leaving an unfusion portion for injection of the electrolyte solution, injecting the electrolyte solution into the electrode group through the unfusion portion of the package; and fusion-bonding the unfusion portion of the package.    DESCRIPTION OF DRAWING(S) - The figure shows perspective view of electrode stack.    Cathode (11)    Anode (12)    Fusion-bonded portion (22)    Electrode stack (23)