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    • 2. 发明专利
    • SODIUM-SULFUE BATTERY
    • JPH06140075A
    • 1994-05-20
    • JP28451392
    • 1992-10-22
    • HITACHI LTDTOKYO ELECTRIC POWER CO
    • OTEGI SATORUKAWAKAMI MITSUOMIZUNO SADAOTATE YASUOUSAMI SABURONISHIMOTO WATARUMARUYAMA TADASHI
    • H01M10/39
    • PURPOSE:To prevent force applied to a solid electrolyte tube even if thermal deformation is caused when a temperature of a positive electrode structure body is lowered as well as to avoid breakage of the electrolyte tube by setting a ratio of linear expansion coefficients in a radial direction and a circumferential direction of the positive electrode structure body in a battery three times or larger than that. CONSTITUTION:A sodium - sulfur battery is composed of a negative electrode active material 1 composed of fused sodium, a solid electrolyte tube 2 composed of beta''-alumina to surround this and a positive electrode structure body 3 composed of carbon fiber felt being an electrical conductive body 7 and sulfur 8 being a positive electrode active material. In this constitution, assuming that a linear expansion coefficient K of felt turning in a radial direction and a circumferential direction in the structure body 3 is set in (K=3) or (K>3), the fact that linear expansion coefficients of the structure body 3 and the electrolyte tube 2 become the same speed when (K=3) is realized and the linear expansion coefficients become mutually separating speed when (K>3) is realized, can be proved. Thereby, the K is set in (K=3) or (K>3), and the sulfur 8 is melted when a battery temperature is raised, and a compressive condition of the felt is released, and the sulfur 8 is solidified when it is lowered, and the structure body 3 is contracted while increasing strength.
    • 6. 发明专利
    • IMPURITIES REMOVING APPARATUS FOR LIQUID METAL SODIUM
    • JPS5487619A
    • 1979-07-12
    • JP15558877
    • 1977-12-26
    • HITACHI LTD
    • SEKI KATSUZOUTATE YASUOSHIBATA YOUJI
    • C22B26/10G21C19/313G21D1/02G21F9/00G21F9/06
    • PURPOSE:To improve the impurities removal performance by means of an economizer serving as an inner support construction with the Na cooling section separated from the purities trapping section in removing Na contained in the liquid sodium as a cooling material for fast breeder reactors. CONSTITUTION:An economizer serving as the inner support construction 16 is installed on the upper portion and a sodium cooling upper shell 14 therearound. A lower shell 21 with a cooling section and a separated impurities trapping section 24 is provided at the lower portion. A hot liquid sodium Na 13 containing impurities is cooled by a cooling fin 20 through which a cooling gas passes and a low temperature sodium which ascends in the economizer 16, when descending outside the economizer 16 within the upper shell 14. Then, it enters the lower shell 21 to be cooled. Consequently, purities separated due to supersaturation deposit on a deposition section 23. In addition, fine impurities are filtered and trapped with a mesh 25 at a trap section 24. After removal of the impurities, sodium enters a center pipe 26, and ascends through the economizer 16 is an upward stream, cooling sodium impurities yet to be cooled thereoutside while heated and then, exhausted out of an outlet 28.