| 摘要 |
The invention relates to a lead accumulator with a thixotropic gel consisting primarily of sulphuric acid and a gel former as an electrolyte, whereby the electrolyte consists of two different phases, a liquid, gel former-free phase, by which essentially the pores of the active materials are filled in, a solid phase, as a thioxotropic gel, by which the electrolyte space especially between the electrodes, is filled up. Both phases merge in the zone of the pores of the separators, which are arranged about the electrodes. Arranged in relation to the electrodes as separators are fibrous, non-woven materials, woven textile fabrics or other flexible, porous surface structures with capillary-active properties, that cover the entire surfaces of the electrodes without separation. The electrodes are retained in their positions by means of spacers. The partial electrolyte present as thixotropic gel contains as gel former 6-15% preferably 8-12% of a pyrogenically produced silicic acid, the particle size of which measures 0.01-0.1 microns, preferably 0.01-0.02 microns. According to the process for producing the accumulator set forth in the invention, (a) in a first step, the pores of the active materials in the electrodes and the pores of the separators arranged in relation to the electrodes are impregnated with a sulphuric acid-containing electrolyte that is free of gel formers and (b) in a second step, the spaces remaining empty between the electrodes including the remaining electrolyte space are filled up with a thixotropic gel as electrolyte that consists essentially of sulphuric acid and a gel former. |
