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    • 120. 发明授权
    • Circuit protection arrangement
    • 电路保护装置
    • US06862164B2
    • 2005-03-01
    • US10140966
    • 2002-05-07
    • Takashi HasunumaNaofumi MiyasakaMasatoshi SakamotoTakashi Sato
    • Takashi HasunumaNaofumi MiyasakaMasatoshi SakamotoTakashi Sato
    • H01C7/02H01C13/02H01M2/34H01M6/50H01M10/0525H02H9/02H02H9/00H01H7/00
    • H01C13/02H01C7/021H01C7/027H01M2/34H01M2/348H01M6/5011H01M10/0525H01M2200/106
    • A circuit protection arrangement particularly useful in protecting battery assemblies. The arrangement contains a first PTC device which has a first switching temperature Ts1, has a resistance at 20° C. R1, has a hold current at a first specified temperature IH1, and is made from a first PTC resistive element composed of a first conductive polymer composition attached to first and second electrodes, and a second PTC device which is electrically connected in series with the first PTC device, has a second switching temperature Ts2 which is less than Ts1, has a resistance at 20° C. R2 which is less than R1, has a hold current at the first specified temperature IH2 which is greater than IH1, and is made from a second PTC resistive element composed of a second conductive polymer composition attached to third and fourth electrodes. IH1 equals IH2 at a critical temperature Tcrit, such that at temperatures below Tcrit, the first PTC device switches into a high resistance state and the circuit protection arrangement is resettable, and at temperatures greater than Tcrit, the second PTC device switches into a high resistance state and initiates an action causing the circuit protection arrangement to permanently open.
    • 一种特别用于保护电池组件的电路保护装置。 该装置包括第一PTC器件,其具有第一开关温度Ts1,在20℃具有电阻。R1具有在第一规定温度IH1下的保持电流,并且由第一PTC电阻元件制成,第一PTC电阻元件由第一导电 连接到第一和第二电极的聚合物组合物和与第一PTC装置串联电连接的第二PTC装置具有小于Ts1的第二开关温度Ts2,其电阻为20℃。R2较小 比R1具有大于IH1的第一规定温度IH2的保持电流,并且由连接到第三和第四电极的第二导电聚合物组合物构成的第二PTC电阻元件制成。 IH1在临界温度Tcrit处等于IH2,使得在低于Tcrit的温度下,第一PTC器件切换到高电阻状态,电路保护装置可重置,并且在大于Tcrit的温度下,第二PTC器件切换到高电阻 状态并启动导致电路保护装置永久打开的动作。