Voltaic cells

798,452. Batteries. BURNDEPT, Ltd. July 21, 1955 [July 21, 1954], No. 21297/54. Class 53. Each cell of a layer-type battery is enclosed in a closely-fitting preformed tube of dielectric plastic, the ends of which are welded to leave pockets for accommodation of gas and/or liquid produced during operation and storage. The plastic of the tube is pervious of gases produced in the cell. As shown in Fig. 2, the cell components consisting of a cathode mix 6, electrolyte-impregnated bibulous paper5, a ziinc anode 4 and a current collector 3 of conductve plastic for the cathode mix of the adjacent cell are enclosed within a tube 1 of polyvinylchloride, the ends of which are sealed by welding. Openings 2 which may be covered by conductive foil provide for electrical contact between the cells. Alternatively, conductive tongues attached to or struck up from the anode pass through slits in the tube wall or through the welded ends of the tube into the next cell. The tongues may be covered with graphite-loaded polyvinylchloride. The welded ends of the tubes may be folded over as shown in Fig. 3 and held by a frame which does not extend over the whole width of the stack.