| 摘要 |
932,776. Batteries. YARDNEY INTERNATIONAL CORPORATION. Nov. 25, 1959 [Nov. 26, 1958; April 27, 1959], No. 40075/59. Class 53. The negative electrode 14 of a silver-zinc alkaline cell consists of a zinc sheet covered on one face with a similarly shaped copper sheet which may be attached to the zinc sheet by spot-welding at points 19. Alternatively, the two layers may be laminated together by electro-plating, hot-spraying, sputtering or sintering. Both sheets have cut-away portions 17. The positive electrode comprises two silver plates 10, 10<SP>1</SP>, Fig. 4, which are enveloped in a sheet 11 of regenerated cellulose and a porous layer 13 of nylon mesh. The positive unit is placed on the composite zinc electrode 14 as shown in Fig. 6, and the extending portions 21, 211 folded over on the nylon wrapping 13. The assembled electrodes are folded along a line defined by the gaps 17 to form a U-shaped unit as shown in Fig. 8. Several such units are placed in a casing with their outer copper coverings in contact to join the units in parallel. Leads from all the positive electrodes are brought out to a single terminal, one lead for all the negative electrodes being inserted between two adjacent cell units. In a modification a copper mesh or grid carrying a spongy zinc coating is interposed between the negative electrode and the insulation surrounding the positive electrode. The battery is given an initial overcharge to convert the silver of the positive electrode to silver peroxide. |
