Abstract: An alkaline storage battery comprising at least one positive electrode and a negative zinc electrode in contact with an electrolyte via at least one electrolyte-impregnated separator is disclosed. The electrodes are clamped against two respective bipolar screens supported by a sealing frame. The positive electrode is in contact with a first electrolyte having a predetermined volume and composition via at least one first separator, the negative electrode is in contact with a second electrolyte having a predetermined volume and composition different from those of the first electrolytes via at least one second separator, and the first and second electrolytes are separated by a membrane forming a zincate and optionally aluminate filter, particularly an anionically conductive membrane defining first and second compartments.

Abstract: A bipolar electrode for alkaline batteries, including a conductive screen, a tridimensional collector provided with asperities which is plated on each side of the conductive screen, active material filling the collectors in order to constitute positive and negative electrodes, respectively, wherein at least one of each side of the conductive screen is grooved and the tridimensional collector is affixed to the conductive screen by means of a non-conductive adhesive, stable in the presence of a highly alkaline electrolyte, in direct contact with the external sides of the conductive screen by means of the asperities of the tridimensional collector.