| 摘要 |
1,125,896. Electric cells. SOC. DES ACCUMULATEURS FIXES ET DE TRACTION. 25 May, 1966 [25 May, 1965; 21 Feb., 1966], No.23487/66. Heading H1B. An electric cell, such as shown in Fig. 1, comprises a casing 1 containing a block composed of positive and negative electrodes 2 and 3 respectively, with an insulating separator 5 positioned between each adjacent pair of electrodes of opposite polarity, the block further comprising a porous non-rigid layer 6 comprising carbon or a metal more electropositive than the metal of the negative electrode active material, the pores of the porous layer being coated with a porous deposit of water-repellent material and a face of said porous layer being in contact with a face of at least one negative electrode in such a manner that the carbon or metal of the porous layer is in contact with the active material on the face of a negative electrode. The casing of the cell may be hermetically sealed or it may be provided with a valve adapted to open when a particular gas pressure is developed in the casing. The cells are suitably of the nickel-cadmium or silver-cadmium type. Suitable separators are made of a felt, a blotter or a woven fabric of fibres such as nylon. The porous layer 6 may be of a nylon felt plated with silver and impregnated with a waterrepellent material such as polystyrene or polytetrafluoroethylene. The porous layer may also bo comprised of a felt of metallic or graphite fibres without any insulating support. Electrolyte sufficient to fill all the pores present in electrodes, separators and porous layers is provided before sealing of the cell. |
