Abstract: A prismatic battery with tabless current collectors. Electrode plates are wound to have a rectangular or elliptic cross section, and current collectors formed of metal plates having a shape conforming to this cross section are welded to the end faces of the belt-shaped current collecting portions of the electrode assembly. The metal plate includes a pair of lengthwise notches and a pair of widthwise notches respectively extending from the center to the periphery, and the opposing side edges of these notches protrude orthogonally from the metal plate to form connection pieces, which are welded to the belt-shaped current collecting portions of the electrode assembly.

Abstract: An improvement is provided in the shape of current collectors welded to the respective terminal edges of electrode plates projecting from the upper and the lower end plane of a spirally coiled electrode plate assembly incorporated in a cylindrical storage battery. In the preferred embodiment, the current collector formed essentially of a rectangular flat plate is provided with an I-shaped cutout hole which passes the center of the plate and ends inside the plate near to its outer peripheral edge and two of rectangular cutout parts which are approximately at a right angle to the I-shaped hole and extend from the neighborhood of the center of the plate to its outer peripheral part without intersecting the I-shaped hole, downward rib-formed projections being respectively formed integrally at the edge parts of the cutout hole and the respective cutout parts, the respective rib-formed projections crossing the terminal edges of the electrode plate and being welded to the terminal edges at a plurality of spots.

Abstract: A cylindrical storage battery has a spirally coiled electrode plate assembly in which the shape of the current collector welded to the end part of the electrode plate assembly and the crossing parts of the rib-formed projections of the current collector and the electrode plate terminal edges are welded with sufficient strength to permit a high-rate charge and discharge. A storage battery having a spirally coiled electrode plate assembly includes a positive electrode plate, a negative electrode plate, a separator, and rectangular current collectors, respective ones of which are welded respectively to terminal edges of the electrodes respectively projecting outward from the upper and the lower end planes of the electrode assembly.