(57) [summary] [purpose] can prevent the lifting of the current collector in the sheet-like plate, you get a mold that can prevent the occurrence of an internal short circuit. [Configuration] The first mold 11 forming the active material sheet is placed on the pressing surfaces 10, the current collector 2 is placed on the active material, distribution over the current collector 2 has been made of a second mold 12 for pressurizing the active material and the current collector 2 with pressing surfaces 10, a convex portion 14 formed on the periphery of the pressing surface 10 of the first mold 11, and the convex portion on the outer periphery of the 14, it is the floor surface to form a groove portion 15 is lower than the pressing surface 10. [Effect] it can be pressed strongly inclined flanks of the sheet-shaped electrode plate by the convex portion, thereby possible to prevent the lifting of the current collector, also burrs occur at the lower end of the inclined side of the sheet-shaped electrode plate by the grooves on the outside Since projected longer, it is possible to eliminate the defect of the battery due to internal short-circuit.
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