Patent ID: 6183900
Filing Date: 2001-02-06
Classification: H01M,Y02E,Y02P

Abstract:
A 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, clamped against two respective bipolar screens supported by a sealing frame; wherein the positive electrode is in contact with a first electrolyte having a predetermined volume and composition via at least one first separator, wherein the negative electrode is in contact with a second electrolyte having a predetermined volume and composition different from those of the first electrolyte via at least one second separator, wherein the first and second electrolytes are separated by a membrane forming a zincate and optionally aluminate filter, said membrane defining a positive compartment and a negative compartment; wherein said membrane has a given anionic conductivity for at least 90% of the through-current of OH.sup.- anions, and wherein said membrane is based on polyoxyethylene or polyoxymethylene modified by exchange groupings of the quarternary ammonium type.