Abstract: Provided is a battery residual value determination system capable of easily and accurately determining the residual value of a battery. The battery residual value determination system includes: a battery information reception unit that receives information on the voltage, the current, the temperature, and the period of time elapsed from the time of manufacture of a battery; a first residual value determination unit that determines a first residual value indicating the SOH of the battery; an attenuation function determination unit that determines an attenuation function which indicates a time-dependent change of the SOH specific to the battery and is used for correcting the first residual value of the battery; and a second residual value output unit that determines and outputs a second residual value obtained by correcting the first residual value by using the attenuation function according to the period of time elapsed from the time of manufacture of the battery.

Abstract: A device is capable of evaluating the degree of deterioration of a secondary battery by executing regression analysis processing using, as a target variable, the degree of deterioration of the secondary battery. Multiple regression analysis is executed by using, as explanatory variables, respective values of plural model parameters that define a secondary battery model based on a measurement result of complex impedance of each reference secondary battery, and a degree of deterioration evaluated according to the secondary battery model as a target variable. Then, a degree of deterioration of a target secondary battery is evaluated according to a multiple regression equation obtained as a result of the multiple regression analysis.

Abstract: Provided is a battery lease system which can rationalize the burden of a user when using a battery and encourage the user to purchase an electric vehicle or the like effectively. The battery lease system accepts input of estimation basic information, estimates an estimated degradation state at the expiration of a scheduled lease term, determines a first lease fee of the battery, accepts input of information indicating that a first lease is started, and stores the information in a storage unit. Then, the battery lease system acquires battery information required to determine a degradation state of the battery returned after the expiration of the first lease of the battery, determines a degradation state of the returned battery, and redetermines a first lease fee based on the estimated degradation state and the degradation state of the returned battery.

Abstract: Provided is a device or the like that can improve the accuracy of battery performance evaluation of a rechargeable battery. Parameter values of a rechargeable battery model are identified on the basis of a measurement result of a complex impedance Z of a first rechargeable battery 221. The rechargeable battery model expresses an impedance of an internal resistance of the first rechargeable battery 221 with transfer functions representing IIR and FIR systems, respectively. Performance of a second rechargeable battery 222 is evaluated on the basis of a result of contrast between a voltage response characteristic V(t) that is output from a rechargeable battery 220 as the second rechargeable battery 222 when an impulse current I(t) is input to the second rechargeable battery 222, and a model voltage response characteristic Vmodel(t) when the impulse current is input to the rechargeable battery model having the parameter values identified.

Abstract: The battery charge/discharge testing device includes a sub-charge/discharge unit connected to a main charge/discharge unit through bus lines, wherein when an output voltage of a built-in battery in the sub-charge/discharge unit is in a voltage range capable of supplying power, sub-power supply control is executed to supply discharge power of a built-in battery between the bus lines through a full-bridge circuit in a sub-DC/DC conversion unit by duty-ratio controlling ON/OFF of switching elements of the full-bridge circuit so that the voltage between the bus lines becomes a first predetermined voltage value. When the voltage exceeds the first predetermined voltage value during the sub-power supply control, the control is stopped, and constant current charge control is executed to charge the built-in battery through the full-bridge circuit by using, as a power supply, discharge power of the test battery supplied between the bus lines by duty-ratio controlling ON/OFF of the switching elements.

Abstract: Provided are a used battery unit holder and a used battery unit storage system capable of easily storing and transporting used battery units from various manufactures while suppressing the deterioration of the used battery units during storage. The used battery unit holder is detachably attachable to a storage device for storing multiple used battery units, including: a connection unit for connecting a used battery unit held in the holder through a circuit included in the storage device in such a manner that the used battery unit can be charged and discharged; a battery status recognition unit which recognizes the battery status of the used battery unit; a charge/discharge instruction acquisition unit winch acquires charge/discharge instruction information; and a charge/discharge management unit which discharges from a discharge-target battery unit and charges a charge-target battery unit in a manner to fall within a predetermined SOC range according to the charge/discharge instruction information.

Abstract: Constant current charge control for supplying a charging current of a set current value to a battery by duty-ratio control for a full-bridge circuit is executed. When the voltage between terminals of the battery rises to a set voltage value during the constant current charge control, the constant current charge control is stopped and constant voltage charge control for supplying the charging current to the battery to maintain the voltage between the terminals at the set voltage value is executed. When the charging current drops to zero during the constant voltage charge control, the constant voltage charge control is stopped and zero amp control for maintaining the charging current at zero is executed. When the voltage between the terminals rises above the set voltage value during the zero amp control, the zero amp control is stopped and minute discharge control is executed.

Abstract: The battery residual value display device includes: a battery information receiving module; an attenuation function determining module; a second residual value determining module; a graph output module configured to output a graph of which one axis indicates residual values of a battery and another axis indicates information on an elapsed time from a time of manufacture of the battery; and a display unit. The graph output module is configured to output: in the graph, a display indicating a first residual value; a display indicating boundaries between a plurality of residual value ranks obtained by dividing the residual values in accordance with a level of a second residual value; and a display indicating boundaries between a plurality of groups, indicating types of applications in which the battery can be used, obtained by dividing the plurality of residual value ranks in accordance with the level of the second residual value.

Abstract: A present measurement value p (k) of each of plural characteristic parameters p, representing the characteristics of a secondary battery 220, is input to initial characteristic model to calculate an initial characteristic estimated value p1 (0?k) of a first characteristic parameter as output of the initial characteristic model. A first index value F1 (i) representing the present state of the target is calculated based on a present time series P1 (i) of the measurement value p1 (k) of the first characteristic parameter. A second index value F2 (i) representing a past state of the target is calculated on the basis of a present time series P1 (0?k, i) of the initial characteristic estimated value p1 (0?k) of the first characteristic parameter. A degradation state of the target is determined based on the first index value F1 (i) and the second index value F2 (i).

Abstract: To provide a feedback control device that achieves smooth continuous control at the time of switching of binary feedback controls. When, as a result of constant current feedback control being performed through a connection between a current control unit 12 and an I control unit 24, a detected measured voltage value of a control object 21 reaches a preset value that is maintained by constant voltage feedback control, a u1/u2 determination unit (switching determination unit) 27 controls changeover switches 22 and 23 to connect a voltage control unit 15 and the I control unit 24 and, in addition, connect the voltage control unit 15 to an adder 25 to which the I control unit 24 is connected, and performs switching to constant voltage feedback control.

Abstract: To provide a feedback control device that achieves smooth continuous control at the time of switching of binary feedback controls. When, as a result of constant current feedback control being performed through a connection between a current control unit 12 and an I control unit 24, a detected measured voltage value of a control object 21 reaches a preset value that is maintained by constant voltage feedback control, a u1/u2 determination unit (switching determination unit) 27 controls changeover switches 22 and 23 to connect a voltage control unit 15 and the I control unit 24 and, in addition, connect the voltage control unit 15 to an adder 25 to which the I control unit 24 is connected, and performs switching to constant voltage feedback control.

Abstract: A digital AGC control method and feedback control apparatus that enable appropriate feedback control in response to reference input values of various magnitudes are provided. The method comprises a first step in which a digital AGC unit 11 outputs a setting value in accordance with a reference input value, a second step in which a PI control unit 12 calculates an operation amount of a controlled object 16 using the setting value, a third step in which a DAC 13 generates an output signal Y representing the operation amount, a fourth step in which a gain regulator 14 and an ADC 15 calculate a measurement value M of the controlled object; and a fifth step in which the measured value M is input to the digital AGC unit 11.

Abstract: There is provided a power converter that is operated by using a power supply of one system and effectively using a current flowing in a load. A charging operation that supplies a charging current and the like to a load 13 and a discharging operation that outputs a discharging current from the load 13 are performed by switching each semiconductor switch of a full-bridge circuit 12. A control section 15 controls all semiconductor switches of the full-bridge circuit 12 to be in an OFF state while switching the charging operation and the discharging operation, makes an inertia current generated by energy accumulated in inductors 27 and 28 flow from a circulation diode of the semiconductor switch that is in OFF-state to a first connection point of the full-bridge circuit 12, and supplies the inertia current to a control power supply section 14 or a DC fan 16 by the reverse flow prevention diode 18.

Abstract: A digital AGC control method and feedback control apparatus that enable appropriate feedback control in response to reference input values of various magnitudes are provided. The method comprises a first step in which a digital AGC unit 11 outputs a setting value in accordance with a reference input value, a second step in which a PI control unit 12 calculates an operation amount of a controlled object 16 using the setting value, a third step in which a DAC 13 generates an output signal Y representing the operation amount, a fourth step in which a gain regulator 14 and an ADC 15 calculate a measurement value M of the controlled object; and a fifth step in which the measured value M is input to the digital AGC unit 11.

Abstract: A full-bridge power converter is provided. A control unit 30 generates control signals for individual switching elements for controlling ON/OFF operation of switching elements 11˜14, alternately turns the switching element 11 and switching element 12 ON/OFF, also alternately turns the switching element 13 and switching element 14 ON/OFF, outputs supply current from a full-bridge circuit 10 for supplying to a load 3, and, during a period when the supply current is not supplied, turns ON both the switching element 11 and switching element 13 to pass inertial current by discharging energy stored in inductors 16 and 17, and filter capacitors 19 and 20 absorb the charge of common-mode noise components appearing on an output line connecting the inductor 16 and an output capacitor 18 and on an output line connecting the inductor 17 and the output capacitor 18.

Abstract: There is provided a power converter that is operated by using a power supply of one system and effectively using a current flowing in a load. A charging operation that supplies a charging current and the like to a load 13 and a discharging operation that outputs a discharging current from the load 13 are performed by switching each semiconductor switch of a full-bridge circuit 12. A control section 15 controls all semiconductor switches of the full-bridge circuit 12 to be in an OFF state while switching the charging operation and the discharging operation, makes an inertia current generated by energy accumulated in inductors 27 and 28 flow from a circulation diode of the semiconductor switch that is in OFF-state to a first connection point of the full-bridge circuit 12, and supplies the inertia current to a control power supply section 14 or a DC fan 16 by the reverse flow prevention diode 18.

Abstract: A full-bridge power converter is provided. A control unit 30 generates control signals for individual switching elements for controlling ON/OFF operation of switching elements 11˜14, alternately turns the switching element 11 and switching element 12 ON/OFF, also alternately turns the switching element 13 and switching element 14 ON/OFF, outputs supply current from a full-bridge circuit 10 for supplying to a load 3, and, during a period when the supply current is not supplied, turns ON both the switching element 11 and switching element 13 to pass inertial current by discharging energy stored in inductors 16 and 17, and filter capacitors 19 and 20 absorb the charge of common-mode noise components appearing on an output line connecting the inductor 16 and an output capacitor 18 and on an output line connecting the inductor 17 and the output capacitor 18.

Abstract: A full-bridge power converter is provided wherein a full-bridge circuit is operated so as to minimize ripple current. A switch control unit 20 generates control signals for individual switching elements to control the ON/OFF operation of switching elements of a full-bridge circuit 10, thereby turning a switching element (Q1) 11 and a switching element (Q2) 12 ON and OFF alternately and turning a switching element (Q3) 13 and a switching element (Q4) 14 ON and OFF alternately to output from the full-bridge circuit 10 supply current for supplying to a load 21, and turning ON both the switching element (Q1) 11 and the switching element (Q3) 13 during a period when the supply current is not output, thereby connecting and passing inertial current between the connection points of the full-bridge circuit 10.

Abstract: A method and apparatus is used to confirm the charge amount and degradation state of a battery. Various cycle test battery measurements are conducted at prescribed time intervals until the end of the battery life, and the measured values are used to generate a determination table or determination tables showing relationships between battery charge amount and degradation state. To establish the charge amount and degradation state of a subject battery, the subject battery is measured and the results compared with determination table values. The existing charge amount and the state of battery degradation are estimated in accordance with a determination table location of matching values.

Abstract: A method and apparatus is used to confirm the charge amount and degradation state of a battery. Various cycle test battery measurements are conducted at prescribed time intervals until the end of the battery life, and the measured values are used to generate a determination table or determination tables showing relationships between battery charge amount and degradation state. To establish the charge amount and degradation state of a subject battery, the subject battery is measured and the results compared with determination table values. The existing charge amount and the state of battery degradation are estimated in accordance with a determination table location of matching values.