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    • 3. 发明专利
    • Apparatus and method for estimating electric storage device degradation
    • AU2013382873B2
    • 2016-03-10
    • AU2013382873
    • 2013-03-18
    • MITSUBISHI ELECTRIC CORP
    • OKADA YURUKISHIRAGA SHOWADA TOSHIHIROYOSHIOKA SHOJI
    • H01M10/48H01M10/44H02J7/00
    • In the present invention, a circuit selection unit (13) turns switches (S1, S2) on and off so that the resistance of a charge and discharge circuit (17) changes at least once while an electric storage device starts to be charged in a state where the voltage of the electric storage device (2) is the upper limit voltage, whereupon the voltage reaches the lower limit voltage. An amount of electricity estimation unit (14) computes the amount of electricity by integrating over time the current during the time period from the discharge-start time point to an arbitrarily determined time point, and computes the relationship between the amount of electricity and the voltage of the electric storage device (2). An internal resistance estimation unit (15) computes the internal resistance on the basis of the voltage and current of the electric storage device (2) at points in time where the resistance is different. An electric energy estimation unit (16) computes the relationship between the amount of electricity and the open voltage on the basis of the relationship between the amount of electricity and the voltage, and the current and internal resistance of the electric storage device (2). When the electric storage device (2) is charged and discharged, the electric energy estimation unit (16) estimates the electric energy of the electric storage device (2) on the basis of the relationship between the amount of electricity and the open voltage, the internal resistance, and the charge and discharge current.
    • 6. 发明专利
    • Charge status estimation apparatus
    • AU2010354957B2
    • 2014-04-17
    • AU2010354957
    • 2010-06-07
    • MITSUBISHI ELECTRIC CORP
    • YOSHIOKA SHOJITABUCHI AKIKOHATANAKA KEITAKITANAKA HIDETOSHI
    • G01R31/36
    • A charge status estimation apparatus comprises: a first calculation unit (30) that calculates and outputs, as a first charge status estimation value, a present value of charge status estimation value on the basis of the capacity of a battery, a previous value of charge status estimation value and a current flowing between a current control device (3), which controls the charging and discharging amounts of a power storage device (1), and the power storage device (1); a second calculation unit (31) that calculates and outputs, as a present value of second charge status estimation value, a charge status estimation value on the basis of an equivalent circuit model of the battery and the voltage of the battery during a constant current control and that calculates and outputs, as a second charge status estimation value, a present value of charge status estimation value on the basis of the equivalent circuit model of the battery and the voltage of the battery, with the variation of resistance of the battery taken into consideration, during a constant voltage control; and a correction calculation unit (32) that periodically corrects the first charge status estimation value by use of the second charge status estimation value.
    • 7. 发明专利
    • Charge state estimation apparatus
    • AU2010349140A1
    • 2012-09-27
    • AU2010349140
    • 2010-03-26
    • MITSUBISHI ELECTRIC CORP
    • TABUCHI AKIKOYOSHIOKA SHOJIHATANAKA KEITAKITANAKA HIDETOSHI
    • G01R31/36
    • Disclosed is a charge state estimation apparatus (10) which is connected to an electric power storage apparatus (11) being connected with a plurality of cell batteries (4-1 through 7-K) and estimates a charge state of the electric power storage apparatus (11). The charge state estimation apparatus (10) comprises: a first SOC computation unit (20) for computing an electric current integrated value and for outputting the electric current integrated value as a first charge state estimation value (SOC1); and a second SOC computation unit (24) for estimating open circuit voltage and for outputting the open circuit voltage as a second charge state estimation value (SOC20) after the electrical discharge of the electric power storage apparatus (11) stops. The first SOC computation unit (20) computes the electric current integrated value, using a previous SOC value as an initial value, based on electric current from an electric current detector (17) for detecting a total current (Iall) of a power conversion apparatus (12) flowing into and out of the electric power storage apparatus (11). The second SOC computation unit (24) estimates the open circuit voltage based on a total voltage (Vall) detected at a connection point between the power conversion apparatus (12) and the electric power storage apparatus (11), a previous value of the total voltage (Vall), and a gain (K3) that decreases with a lapse of time from a stop of the electrical discharge of the electric power storage apparatus (11).