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    • 82. 发明专利
    • EXTINGUISHING METHOD FOR FIRE OF SODIUM-SURFUR BATTERY
    • JPH03112568A
    • 1991-05-14
    • JP25281489
    • 1989-09-28
    • NGK INSULATORS LTD
    • KAWAI KENJIKURI TAKAYOSHIKIRISAWA TAKASHISUZUKI TOSHIAKIKATO KENJI
    • H01M10/39A62C3/06
    • PURPOSE:To rapidly extinguish the fire of a sodium-sulfur battery by a method wherein oil having a high flash point higher than the melting temperature of the active material of the battery and nonreactivity against the active material and a product produced during the occurrence of a fire and insulating properties is injected in a case containing the battery. CONSTITUTION:When an abnormal even is detected by, for example, a heat sensor and a gas sensor in a case 2, a control device closes an inflow pipe 9a and a discharge pipe 9b to stop the circulation of air and stop heating effected by an electric heater 6. An outflow pipe 8 is opened and an injection pipe 7 is opened to inject silicone oil 3 from a position below the case 2, and an injection pipe 10 is opened to jet in nitrogen gas G. In which case, since the silicone oil 3 has high heat capacity, metallic sodium, surfur, and sodium polysulfide flowing in the case 2 are rapidly cooled for coagulation. Meanwhile, the silicone oil 3 does never chemically react to metallic sodium and surfur, and since the flash point of the silicone oil 3 is higher than the melting temperatures of metallic sodium and surfur, the silicone oil 3 is prevented from taking fire.