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    • 9. 发明授权
    • Deterioration determination circuit, power supply apparatus, and deterioration determination method of secondary battery
    • 二次电池劣化判定电路,供电装置和劣化判定方法
    • US08154299B2
    • 2012-04-10
    • US12493642
    • 2009-06-29
    • Takuma IidaAkihiro TaniguchiTakuya Nakashima
    • Takuma IidaAkihiro TaniguchiTakuya Nakashima
    • G01N27/416H02J7/00
    • G01R31/3679H01M10/345H01M10/425H01M10/4285H01M10/48
    • Provided is a deterioration determination circuit configured by including: an SOC detection unit for detecting an SOC of a secondary battery; an internal resistance detection unit for detecting an internal resistance value of the secondary battery; a first determination unit for determining the status of deterioration of the secondary battery based on the internal resistance value detected by the internal resistance detection unit when the SOC detected by the SOC detection unit is within a range of a pre-set first range; a second determination unit for determining the status of deterioration of the secondary battery based on the internal resistance value detected by the internal resistance detection unit when the SOC detected by the SOC detection unit is within a range of a pre-set second range as a range of an SOC, in which a variation of the internal resistance of the second battery in relation to a variation of the SOC of the secondary battery is different from the first range; and a final determination unit for ultimately determining that the secondary battery is deteriorated when the first determination unit determines that the secondary battery is of the deteriorated status and the second determination unit additionally determines that the secondary battery is of the deteriorated status.
    • 提供一种劣化判定电路,其包括:SOC检测单元,用于检测二次电池的SOC; 内部电阻检测单元,用于检测二次电池的内部电阻值; 第一确定单元,用于当由SOC检测单元检测到的SOC在预定的第一范围的范围内时,基于由内部电阻检测单元检测的内部电阻值来确定二次电池的劣化状态; 第二确定单元,用于当由SOC检测单元检测到的SOC在预定的第二范围的范围内时,基于由内部电阻检测单元检测到的内部电阻值来确定二次电池的劣化状态, 其中第二电池的内部电阻相对于二次电池的SOC的变化的变化与第一范围不同; 以及最终确定单元,用于当所述第一确定单元确定所述二次电池处于劣化状态并且所述第二确定单元另外确定所述二次电池处于劣化状态时,最终确定所述二次电池劣化。