Electrochemical storage cell

Claim 1

Electrochemical storage cell comprising a part made of a ceramic, ioncontaining solid electrolyte material, constituting ceramic plates which have been sintered together and form mutually parallel rectangular channels with thin partitioning walls and with an upper end and with an opposite lower end, with alternate parallel rectangular channels having openings for feeding liquid sodium at the upper end and closed at the opposite end forming anode spaces and containing liquid sodium and parallel rectangular channels adjacent the alternate channels open at the upper and lower ends forming cathode spaces and containing liquid sulfur and cell reaction products, said openings at the upper end of the anode spaces connected to a separate sodium supply tank disposed away from said openings, said cathode spaces connected to a sulfur and cell reaction products supply, and metallic curent collectors extending into the cathode spaces, wherein said sodium supply is in the sodium supply tank with a temperature level of about 100°-200° C., and wherein said sulfur and cell reaction products supply is a supply tank for sulfur and cell reaction products (Na 2 S x ) with a temperature level of about 200°-300° C., and wherein said solid electrolyte part has a temperature level of about 250°-350° C., and that the different temperature levels are thermally uncoupled by delay lines in conduit means connecting the anode spaces to the sodium supply, and in conduit means connecting the cathode spaces to the sulfur and cell reaction products supply, wherein the cell is enclosed by a radiation shield as an outer heat container reflecting heat radiating from the cell, wherein within said outer radiation shield is disposed an inner radiation shield enclosing as inner heat container the solid electrolyte part and the supply tank for sulfur and cell reaction products (Na 2 S x ), wherein the delay lines are part sections of the sodium supply conduit and of the supply conduit for sulfur, respectively leading from a lower to a next higher temperature level and, wherein a first conduit section of the sodium supply line in the form of a capillary tube is connected to the sodium supply tank, an intermediate conduit section of the sodium supply line is wound helically on the inner radiation shield, a third conduit section of the sodium supply line is connected to the anode space, with the first, intermediate and third conduit sections in a relatively cool zone, an intermediate temperature zone and a warm zone respectively.