A sodium-sulfur battery

Abstract

The invention discloses a sodium-sulfur battery in the field of chemical energy storage. A ceramic insulating ring protruding radially outward is fixed on the top surface, and the positive electrode chamber is closed by an L-shaped metal ring, a groove-shaped metal ring and a top metal ring; the L-shaped metal ring is divided into a vertical section and a horizontal section, and the top surface of the horizontal section is It is fixed with the bottom surface of the ceramic insulating ring; the inner side of the vertical section is fixed with the outer side of the ceramic insulating ring, the outer side is separated from the inner side of the shell, and the top surface is higher than the top surface of the ceramic insulating ring; the grooved metal ring is provided with an inner surface. Ring groove wall and outer ring groove wall, the inner ring groove wall is higher than the outer ring groove wall, the outer side of the outer ring groove wall is fixed with the inner side of the vertical section of the L-shaped metal ring, and the top metal ring is connected to the inner side of the groove-shaped metal ring. The outer side of the ring groove wall and the inner side of the housing.

Description

technical field [0001] The invention relates to a sodium-sulfur battery in the field of chemical energy storage. Background technique [0002] The key material for sodium-sulfur batteries is β”-Al 2 o 3 The battery safety performance of the fabricated electrolyte ceramic tube largely depends on the mechanical properties of the electrolyte ceramic tube. Once the electrolyte ceramic tube has microcracks or ruptures, sodium and sulfur will react violently in direct contact, and the temperature can reach up to 2000 °C. There are two main aspects to the safety of sodium-sulfur batteries, one of which is the safety performance of battery heating and cooling. The battery module must undergo regular maintenance and other work. When the battery cools down, especially when the temperature drops below 280°C, the sodium-sulfur The sulfur and sodium polysulfide in the positive chamber of the battery solidify, and the bottom of the electrolyte ceramic tube receives a large compressive ...

AI Technical Summary

Problems solved by technology

The disadvantage of aluminum alloy is that the heat resistance and strength are not high, and when stainless steel is used as the shell 1, the bellows structure is not suitable in terms of cost and performance.

[0005] Such a design cannot fundamentally eliminate the compressive stress on the electrolytic ceramic tube, and the bottom and nozzle of the electrolytic ceramic tube 4 will still crack, so other methods must be considered to disperse the compressive stress on the electrolytic ceramic tube.

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