GB214799A - Improvements in or relating to electric storage batteries - Google Patents

Abstract

214,799. Monnot, J. F. March 17, 1923. Electrodes; connections.-A storage battery electrode consists of a perforated ribbon B of nickel covered with active material in the form of paste and wound on a tube A, the coil so formed being dried and placed in a perforated metal case C and the whole strongly compressed to form a disc as shown in Fig. 4. A metal band D is placed round the edge of the electrode before compression the ends d of the band being welded together to form a connecting lug. During the compression the tube A which may be notched is spread out as shown in Fig. 5. In order to avoid squeezing out of the active material the metal ribbon may be double, the edges of the under strip being turned over the upper strip to retain the active material between them. The double strip may be folded longitudinally into several thicknesses before being wound on the tube A. The coiled strip is then placed within a ring or band D<1> of channel section as shown in Fig. 9 and compressed, the case C being dispensed with. The press may be provided with projections to form grooves in the faces of the electrode. Fig. 10 shows a complete cell employing the above-described electrodes. The electrodes are threaded upon a central rod F and separated by asbestos or other insulating washers J. The lugs d are welded to conductors K connected to the terminals of the cell between which and the cover plate h a tight joint is made by washers l, l<1>, l<2> which are compressed by a nut l<3>. The cell works under a pressure of about 10 lbs. per sq. in. and is fitted with a safety valve which opens if the pressure rises above the predetermined maximum.