Improvements in or relating to a process of manufacture of sintered plates for galvanic cells

摘要

759,788. Batteries. SOC. DES ACCUMULATEURS FIXES ET DE TRACTION. March 16, 1954 [March 17, 1953], No. 7593/54. Class 53. [Also in Group XXII] A continuous process for the manufacture of battery electrodes consists in coating both sides of a perforated metal band or a band of wire mesh or gauze with a suspension of a metal powder, passing the band between two parallel scrapers to bring the coating to the required thickness and then passing it successively through a drying oven and sintering furnace and finally cutting it up into plates of the required size. The band may be impregnated with active material before being cut. The band, Fig. 1, may be made of nickel or nickel-plated copper or iron and have a width equal to the length of the plates to be made and is provided with a margin 1 from which a terminal lug can be cut out. The band is carried on a drum 5 and is pulled through a trough 6 containing a suspension of powdered nickel or ferro-nickel in a liquid which may be water thickened with an alginate, gelatine, starch, a salt of carboxymethyl cellulose or other organic substance. The coated band passes through an adjustable slot 9 and then through a drying oven 10 and sintering furnace 12 through which nitrogen, hydrogen, carbon dioxide or other gas is passed by means of a pipe 13. The band is wound on a drum 14 which serves as a driving member to pull the band through the apparatus. The slot 9 may be shaped to remove the metal suspension from the margin 1 or pressure may be applied to crush the metal deposited thereon at those places where the terminal lugs are to be cut out. Specifications 687,569, 759,789 and 759,790 are referred to.