| 摘要 |
PURPOSE:To limit flow out of sodium to increase safety when an inner container is broken by sealing inactive gas in a gap between an inner container which is an anode constructor and the outer container, and forming a sodium connecting path in an opposite U-shape in the inner container. CONSTITUTION:In a battery using molten sodium as anode active material, molten sulfur-sodium polysulfide as cathode active material, and a solid electrolyte tube 21 which is sodium ion conductive as electrolyte, a closed gap A is installed between a container 26 which is an anode constructor and an outer container 27, and a substance which generates inactive gas by heat decomposition under larger pressure than gas pressure of the inner container 26 is filled in this gap, and an opposite U-shaped sodium connecting path 28 is formed in a bottom cover 29 of the inner container 26. Flow out of sodium, when a battery is broken, is limited by gas pressure inside the gap A and the opposite U-shaped sodium connecting path 28. Therefore, safety of the battery is increased. |
