| 摘要 |
PURPOSE:To restrict the outflow of Na when an outer container that is a negative electrode component body is destroyed and improve the safety of the titled battery by providing a gap between the inner and outer containers that are the negative electrode component body and forming sealing structure and then making the pressure of the gap filled with inert gas higher than that of the inner container. CONSTITUTION:This Na-S battery is comprised by sealing a gap between an inner container 8' that fills Na and an outer container 9' that covers the inner container 8' and inserting a negative electrode component body that fills inert gas in the gap in a Na conductivity solid electrolytic tube 1 with the bottom. In this case, the body can be filled with the gasifying material that is thermally decomposed at temperatures below or exceeding the battery operating temperature and that discharges inert gas instead of inert gas. In addition, the maximum gas pressure P1 within the gap between the containers 9' and 8' is set higher than the maximum gas pressure P2 in the container 8'. When a crack is generated in the tube 1 by accident and the container 9' is perforated, the inert gas in the gap is discharged into the gap between the tube 1 and the outer surface of the container 9'. Since this gas pressure is higher than that of the inner part of the container 8', the supply of Na is stopped through a Na connecting path 10. |
