Abstract: An electrode group winding method and device for batteries provides for winding continuous belt-shaped anode plates, cathode plates and separators into groups of spiral electrodes by means of a turnable winding core. In a specified position in the vicinity of the winding core, an edge of a belt-shaped electrode plate is detected by an edge position detector for comparison with a reference position, and a chuck movable from an end of the electrode plate in a running direction of the electrode plate and a perpendicular direction thereof is used to grip the electrode plated based on the comparison result to correct the edge position of the electrode plate. Then, a second chuck restricted in its movement to only a direction parallel to the moving direction of the electrode plate by a guide is used to hold the electrode plate.

Abstract: A cylindrical guide sleeve has a larger-diameter portion formed at an upper portion thereof, a smaller-diameter portion formed at a lower portion thereof, and a tapered portion formed therebetween. The smaller-diameter portion has an inner diameter substantially identical with or slightly larger than an outer diameter of a cylindrical battery casing. A lower spindle supports a bottom surface of the cylindrical battery casing. An upper spindle pushes a seal plate downward along an inner surface of the cylindrical guide sleeve. In this case, the seal plate is inclined in a floating condition with respect to an axial direction of the cylindrical guide sleeve and connected via a lead to an electrode assembly accommodated in the cylindrical battery casing. A guide actuator shifts the cylindrical guide sleeve upward so as to surround the seal plate in the larger-diameter portion.

Abstract: A winding mandrel holds a central portion of a belt-like electrode assembly extending flatly and rotates to form a spiral roll of the belt-like electrode assembly around this winding mandrel. The belt-like electrode assembly includes a first region extending in one direction from the central portion and a second region extending in the opposite direction from the central portion. A first attracting device is disposed at one side of the winding mandrel for attracting the first region of the belt-like electrode assembly. A second attracting device is disposed at the opposite side of the winding mandrel for attracting the second region of the belt-like electrode assembly.