KR900701055A - Advanced alkali metal battery - Google Patents

Abstract

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Description

Advanced alkali metal battery

Since this is an open matter, no full text was included.

It is described with reference to the accompanying drawings in the present invention.

1 is a cross-sectional view of a sodium sulfur battery embodying the present invention,

2 and 3 are partial cross-sectional views of the cell.

Claims (31)

Outer container. The solid electrolyte cup which divides the container into the positive electrode region inside the cup and the negative electrode region outside the cup and the alkali metal exposed directly to the inner surface of the electrolyte cup, is closely fixed inside the electrolyte cup and is active An alkali metal reservoir providing a region, the reservoir including a flow means for flowing alkali metal from within the reservoir to the active region, and having an electrically insulating ceramic seal sealed in the electrolyte cup and opening therein. And means for enabling the application of excessive pressure to the interior of the reservoir during the manufacturing process, said means being provided through a hole in the closure between the reservoir and the ceramic closure. Including gas tight seals that enable interior and gas tight communication Alkali metal battery. 3. The alkali metal cell of claim 2 wherein the opening of the reservoir has a wall extending below the ceramic closure and the ceramic closure has an opening in alignment with the aperture. 3. The alkali metal cell of claim 2 wherein the gas tight seal comprises means for providing a gas tight connection, wherein the gas tight connection extends from the opening into at least a hole in the ceramic seal. 4. The alkali metal battery of claim 3 wherein the means for providing a gas tight connection is a charging tube. 5. The alkali metal cell of claim 4 wherein the charging tube extends only partially through the aperture and is sealed there. 5. The alkali metal battery of claim 4, wherein the charging tube extends through a hole in the ceramic closure and the both sides are electrically conductive and electrically interconnected to form a contact device for the battery's positive electrode. 6. The alkali metal battery according to claim 5, comprising an anode contactor pin extending through the hole and the filling tube to contact the molten alkali metal contained in the reservoir. 5. The alkali metal battery of claim 4, wherein both sides of the charging tube and the reservoir comprise electrically conductive connections electrically conductive and electrically interconnected and extending through the aperture to electrically connect to the tube. 10. The alkali metal cell of claim 8 wherein the stud has an inner end comprising a capsule, the capsule comprising a thermal expansion material that expands the inner end to form a pressure contact with the filling tube. The alkali metal battery according to claim 4, wherein the charging tube is a deformable metal ferruled rivet. 5. The filling tube according to claim 4, wherein the filling tube extends downward into the reservoir below the maximum level of alkali metal in the reservoir, and the tube closes below the level and opens a lateral opening with respect to the reservoir at the level. Alkali metal battery. 12. The alkali metal battery according to claim 11, wherein the charging tube is closed at the lower end of the tube. 5. The alkali metal cell of claim 4 wherein the charging tube extends downward into the reservoir in proximity to the bottom and is filled over its length with a solid, electrically conductive material. 14. The alkali metal cell of claim 13, wherein the tube is filled with a rod of closely conductive metal of high electrical conductivity. The alkali metal cell according to claim 1, wherein the reservoir is made of mild steel and the face of the vortex is sheathed with graphite foil. 2. The alkali metal cell of claim 1 wherein the active region between the reservoir and the electrolyte cup comprises an alumina fiber material that provides a wick to help zero capillary enteric. 14. An alkali metal cell according to claim 7 or 13, wherein the alkali metal cell has a metallic sponge on the bottom of the reservoir mounted to ensure the preparation of the anode current at a low sodium level. Alkali metal cells divide the outer container, the container into an anode region inside the cup and a cathode region outside the cup, and an electrically insulating ceramic closure with a solid electrolyte cup hole in the vessel bonded around the cup's lip. It is of a type having a metal reservoir or the like which is fixed inside the electrolyte cup while the metal and the induction means flows the metal from the reservoir into the active region and forms an active region between the electrolyte cup and the reservoir. Providing a gas tight connection into the reservoir through, introducing molten alkali metal into the reservoir through the connection, filling the active region with flow of the means in the reservoir with molten alkali metal and sufficiently Providing a transient pressure in the reservoir to wet and then sealing the anode area A method of producing an alkali metal cell of the kind as a method comprising the steps. 19. The method of claim 18, wherein the reservoir is sealed to a ceramic member by the gas tight connection before introducing the alkali metal. 20. The method of claim 19, wherein transient input i is provided by evacuating the positive electrode region prior to introducing alkali metal and repressurizing the interior of the reservoir. 20. The method of claim 19, wherein the filling tube constituting the gas tight connection is provided extending at least into the aperture from the reservoir. The method of claim 21, wherein the filling tube extends through a hole in the ceramic closure. 23. The method of claim 22, wherein the filling tube is sealed in a hole in the ceramic closure and the filling tube and the anode region are finally sealed by crimping the filling tube where it extends outwardly from the closure opening. . 22. The method of claim 21, wherein the filling copper tube extends only partially through the hole in the closure and providing the gas tight connection comprises sealing the filling tube in the hole. 25. The method of claim 24, wherein the filling tube and the anode region are finally sealed by securing the sealing plug in the pores of the ceramic closure. 19. The method of claim 18, wherein the seal plug is configured as a contactor pin. 26. The sealing plug of claim 25, wherein the seal plug has an outer end made of metal and disposed to seal against the closure and an inner end bearing a hollow capsule comprising a thermally expandable material; After the positive electrode region is sealed, the cell is heated to expand the inner end of the stud to make pressure contact with the interior of the filling tube. The method of claim 21, wherein the filling tube is provided to be connected to the reservoir before the electrolyte cup is closed with the ceramic closure. 29. The method of claim 28, wherein the reservoir has a filling tube rigidly connected to the reservoir, wherein the reservoir is used to position the electrolyte cup and the ceramic closure together to seal it. The method of claim 21, wherein the filling tube is provided after the electrolyte cup is closed with the ceramic closure. 33. The closure of claim 30 wherein the reservoir is provided with a deformable metal ferrule rivet in a mandrel having a large head corresponding to a hole in the ceramic closure and having a hole aligned therewith. And through a hole in the reservoir, and then drawing the mandrel out through the ferrule so that the head of the mandrel can swell the ferrule and compressively connect both sides of the reservoir and the ceramic closure. ) Is provided. ※ Note: The disclosure is based on the initial application.