NOVELTY - The sealing method involves positioning of a central line at a side of an electrode assembly storage unit (130) and the side to which thermal lamination film (300) is attached. A remnant side is sealed the electrode assembly of a pouched type battery case (100) to fold the laminated sheet. A thermal lamination film is adhered in the side of the released area of the pouched type battery case. The gas is released in an inner portion with degassing. The pouched type battery case is sealed and initialized to perform charging-discharging. An electrolyte is released by the electrolyte inlet.    USE - Method for sealing a pouch type secondary battery of a wireless mobile apparatus in a vehicle, such as an electric vehicle, a diesel vehicle and a hybrid electric vehicle.    ADVANTAGE - The sealing method involves positioning of a central line at a side of an electrode assembly storage unit and the side to which thermal lamination film is attached, and thus prevents the generation of the insulation resistance fault by the electrolyte burying in the electrolyte inlet of the pouch type secondary battery, increases the thickness of the inner portion sealant layer, adheres the electrolyte injection former thermal lamination film, inner portion sealant layer is easily insulated with the intermediate layer, and hence reduces the insulation resistance fault, prevents area and the stepped pulley, in which thermal lamination film is adhered, improves the decrease rate of the resistance fault, and hence prevents the corrosion of the pouched type battery case, improves the life span of the insulation resistance as the elevation, blocks the moisture penetration path, and improves the stability of the battery and adhesive strength.    DESCRIPTION OF DRAWING(S) - The drawing shows a top view of a thermal lamination film in a method of sealing of a pouch type secondary battery.    Pouched type battery case (100)    Electrode assembly storage unit (130)    Gas trap portion (140)    Virtual center-line (150)    Thermal lamination film (300)