Sodium-sulfur battery with glass electrolyte
AssigneeDeutsche Automobilgesellschaft mbH
InventorsKlaus von Benda, Holger Kistrup
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Abstract
A sodium-sulfur battery in which the sulfur or sulfur-containing positive electrode material is contained in a number of sealed tubes made from a sodium ion-conducting glass electrolyte. The tubes are placed and electrically conducted in parallel and immersed in the sodium constituting the negative electrode. Each of the capillary tubes contains a sealed-in electrical contact wire which passes through an appropriate closure plate to constitute the positive pole of the battery. A number of embodiments is described. The invention also describes the method of construction of the battery.
Claims21
A sodium-sulfur battery including positive and negative electrodes, in which sodium is the active mass of the negative electrode and sulfur or a sulfur-containing substance is the active mass of the positive electrode, said battery further including a glass electrolyte which is represented as a plurality of capillary tubes disposed substantially parallel to one another, and wherein the improvement comprises that the glass capillary tubes having outer diameters up to 1.0 mm contain the active mass of the positive electrode of the battery and are each completely sealed with fused glass of said capillary tubes and each of said capillary tubes contains a metallic wire for making electrical contact with said positive electrode mass, said wire extending substantially throughout the length of each capillary tube and passing through the wall thereof and having a diameter such that each wire occupies only a portion of the available volume in said capillary tube, the active mass of the negative electrode being located adjacent the exterior surfaces of said capillary tubes.
A sodium-sulfur battery including positive and negative electrodes, in which sodium is the active mass of the negative electrode and sulfur or a sulfur-containing substance is the active mass of the positive electrode, said battery further including a glass electrolyte which is represented as a plurality of capillary tubes disposed substantially parallel to one another, and wherein the improvement comprises that the glass capillary tubes contain the active mass of the positive electrode of the battery and are completely sealed and each of said capillary tubes contains a metallic wire for making electrical contact with said positive electrode mass, said wire extending substantially throughout the length of each capillary tube and passing through the wall thereof and having a diameter such that each wire occupies only a portion of the available volume in said capillary tube, wherein said battery comprises a housing at least one end of which is defined by a closure plate consisting at least partially of the same electrolyte glass which constitutes the capillary tubes.
Dependencies are inferred from the claim text.