| 摘要 |
Positive (3) and negative (4) plate electrodes, with interposed separator (5) and recombination (6) layers, are immersed in electrolyte, the separators extending (10) into an underlying zone (7) providing an excess of electrolyte. The accumulator's plastic container (1) is vented through a relief valve set at under 1 bar. The porous nickel negative plates carry a paste based on metal hydride in a polymeric binder; the positive plates incorporate nickel hydroxide. The gas-permeable separators, adjoining the latter, comprise two layers of felted polypropylene, and draw up the underlying excess electrolyte by capillary action, irrigating the plates. The recombination layers are in electrical contact with the negative plates. The volume of electrolyte, an aqueous solution of potassium, sodium and lithium hydroxides, exceeds by e.g. 20-45% that held in the plates, separators and recombination zones. |
