NOVELTY - The apparatus (100) has a thin film formation container (110) i.e. coating tank, storing a mixed and a stirred paste (170). The container is provided with an inflow port (111c) into which the paste flows from a liquid level (LF) of the paste. A sending unit (150) sends the paste in the inflow port. A thin film formation unit (160) forms a thin film (171) along an inner wall face (111b) of the container with respect to the paste sent from the inflow port. The container is provided with a discharge port (111a) to discharge the paste. A stirring blade (130) is attached to a main shaft (131).    USE - One-pass type/batch type paste multi-axial kneading apparatus for a cylindrical shape lithium ion secondary battery used in a vehicle e.g. hybrid vehicle and electrical machinery motor vehicle, and electronic device e.g. mobile telephone and personal computer. Can also be used for nickel-hydrogen battery.    ADVANTAGE - The apparatus allows bubble contained in the paste to float up actively to the interface of the thin film so as to promote the defoaming of the paste in a cost-effective manner. The paste stored in the container is sent from a discharge port into the inflow port, so that the thin film can be repeatedly formed in the inner wall face of the container, thus allowing defoaming of the paste to be effectively promoted with the container. The apparatus allows mixing and stirring of the paste to be performed, so that defoaming of the paste can be performed inexpensively and efficiently by adding the function of defoaming to the mixing container in which mixing and stirring of the paste are performed. The apparatus allows big shear force to act on the paste and the viscosity of a paste to be low when the scraper stretches the paste thinly, so that the defoaming effect can be high, thus maintaining a state with low viscosity. The apparatus allows contact area to be such that the inner wall face of a container can be made small and abrasion of an inner wall face can be made small, so that abrasive foreign material is prevented from being mixed in the paste. The apparatus can prevent generation of a pinhole and a crack in the active material layer of an electrode plate, so that battery with better quality can be manufactured. The apparatus carries out bubble entrainment of the paste located in the peripheral part of the main shaft in an easy manner.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a battery assembly process for injecting and sealing an electrolyte    (2) a method for manufacturing a battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a paste multi-axial kneading apparatus.    Liquid level (LF)    Paste multi-axial kneading apparatus (100)    Thin film formation container (110)    Discharge port (111a)    Inner wall face (111b)    Inflow port (111c)    Stirring blade (130)    Main shaft (131)    Sending unit (150)    Thin film formation unit (160)    Mixed and stirred paste (170)    Thin film (171)