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상변화 물질을 이용한 열전지 단열성능 향상에 관한 연구
이재인,하상현,김기열,정해원,조성백,Lee, Jaein,Ha, Sang-hyeon,Kim, Kiyoul,Cheong, Haewon,Cho, Sungbaek 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.4
Thermal batteries are primary reserve power sources, which are activated upon the melting of eutectic electrolytes by the ignition of heat sources. Therefore, sufficient thermal insulation is absolutely needed for the stable operation of thermal batteries. Currently, excessive amount of heat sources is being used to compensate the heat loss in the cell stack along with the insertion of metal plates and thermal insulators to reserve heat at the both ends of cell stack. However, there is a possibility that the excessive heat flows into the cell stack, causing a thermal runaway at the early stage of discharge. At the same time, the internal temperature of thermal batteries cannot be maintained above the battery operating temperature at the later stage of discharge because of the insufficient insulation. Therefore, the effects of Phase Changing Material(PCM) plates were demonstrated in this study, which can replace the metal and insulating plates, to improve the thermal insulation performance and safety of thermal batteries.