| 摘要 |
791,075. Batteries. VOGT, H. March 19, 1954 [March 21, 1953; Jan. 23, 1954; Feb. 24, 1954; Feb. 24, 1954], No. 8190/54. Class 53. To limit the gas pressure in a sealed alkaline accumulator the cell containing the fully charged electrodes and separators is evacuated and then completely filled with electrolyte. It is then subjected to a further charge to expel a certain quantity of electrolyte and the cell is then sealed. Accumulators that may be treated in this way may have sintered electrodes having a thickness less than 1 mm. and separated by sheets of nylon, glass fabric, cellulose, &c., having a maximum thickness of 0.2 mm. Alternatively the electrodes may be separated by coatings applied to their surfaces, for example diatomaceous earth mixed with a solution of a synthetic resin. The electrodes may be flat or rolled on a core 20 as shown in Fig. 5. Due to the small distance between the electrodes the gases evolved from their surfaces combine with one another to reform water. To prevent bubbles leaving the exposed ends of the electrodes the latter are coated with a resin or other insulating layer 17 which is interrupted at 19 to provide communication between the spaces between adjacent electrodes and the space between the electrode pack and container. The layers 17 are joined to a plastic covering 21 which encloses the pack which is inserted in an outer metal casing 4. Specification 687,569 is referred to. |
