Abstract: An electrode plate precursor on which an active material layer is formed by applying an active material onto at least one surface of a current collector in a lengthy belt shape by means of a die comprising a paste storing part where a paste containing the active material is accumulated and a discharge flow path discharging the above paste from the paste storing part. A plan view configuration of the discharge flow path is adjusted by adjusting a plan view configuration of thin plate-like members that are arranged respectively on both end portions of the discharge flow path so that the active material layer formed in the process has a uniform thickness throughout the entire length in the width direction of the electrode plate precursor.

Abstract: An electrode plate precursor on which an active material layer is formed by applying an active material onto at least one surface of a current collector in a lengthy belt shape by means of a die comprising a paste storing part where a paste containing the active material is accumulated and a discharge flow path discharging the above paste from the paste storing part. A plan view configuration of the discharge flow path is adjusted by adjusting a plan view configuration of thin plate-like members that are arranged respectively on both end portions of the discharge flow path so that the active material layer formed in the process has a uniform thickness throughout the entire length in the width direction of the electrode plate precursor.

Abstract: A production method of the present invention includes steps of: (a) obtaining a first electrode plate precursor 1 by applying an electrode active material onto at least one of surfaces of a long strip-shaped current collector so as to form an active material layer, (b) rolling an electrode plate precursor so that the active material layer has a predetermined thickness, and (c) obtaining plural strips of electrode plates by cutting the rolled electrode plate precursor to a desired width. In the step (a), non-application portions onto which an active material is not applied are formed on both edges of the electrode plate precursor in the width direction. The step (d) of removing the non-application portions is carried out simultaneously with the step (c). Accordingly, it is possible to improve production efficiency and reduce material losses by decreasing quality defects that occur in the step of rolling the electrode plate precursor.

Abstract: The invention relates to an electric double layer capacitor for large capacity used in regeneration or electric power storage for various electric appliances and electric vehicles, and its manufacturing method. As the resin to be used in the current collector, by adding low softening point resin, polytetrafluoroethylene resin, latex resin or the like, the flexibility, thick coating performance and winding performance are improved. By preparing the electrode solution for making such current collector by using a high pressure dispersion machine, the capacity and density of the current collector can be enhanced substantially. According to this manufacturing method, the electric double layer capacitor may be further increased in size, increased in capacity and lowered in cost.