| 摘要 |
PURPOSE:To improve the safety of a battery when an electrolyte is broken by limiting the sodium quantity participating in the reaction with sulfur at a battery reaction section to the minimum and suppressing the direct reaction between sodium and sulfur when the solid electrolyte is broken. CONSTITUTION:An alpha alumina plate 4 electrically insulates an upper container 1 from a lower container 2, a bulkhead 17 is provided on the alpha alumina plate 4, and it forms a sodium storage tank 21 together with the upper container 1. This bulkhead 17 is inserted into a solid electrolyte 3, the upper end of a suction pipe 19 having a blind lower end is fitted, and the suction pipe 19 damps the pressure when the direct reaction between sodium 7 and sulfur 8 is generated by the breakage of the solid electrolyte 3. Even if the solid electrolyte 3 is broken due to deterioration or the like, the quantity of the sodium 7 participating in the direct reaction with sulfur 8 can be limited to the minimum, the direction reaction between sodium and sulfur can be suppressed, and the temperature rise and pressure rise can be suppressed to the minimum. Even if the temperature and pressure in a battery rise, the suction pipe 19 is solved or broken to absorb the pressure, as a result the outermost battery container is not broken. |
