Abstract: A measurement device including an impedance calculator configured to perform following processes S1 to S5 is provided: S1: preparing a Bode diagram; S2: extracting a peak from the Bode diagram; increasing the number of RC parallel circuits by +1, and fitting a mountain shape which is able to be represented by an RC parallel circuit centered on the peak; S3: subtracting a Bode diagram component which is able to be represented by the fitted RC parallel circuit from the Bode diagram of the measurement results; S4: ending identification of the number of RC parallel circuits when a peak is not extracted from the Bode diagram and repeating the processes (S2) and S(3) when a peak is extracted; and S5: reporting the total number of RC parallel circuits.

Abstract: An output control device of a lithium ion battery includes an output control unit that controls an output of the lithium ion battery, and a computation unit that transmits a command to the output control unit, the computation unit calculates a distribution of a current and/or a potential within the electrode thickness of the negative electrode of the lithium ion battery by using a heterogeneous reaction model in the thickness direction of the electrode, and compares the distribution with a specified range in the negative electrode, and/or calculates a distribution of a current and/or a potential within the electrode thickness of the positive electrode of the lithium ion battery by using a heterogeneous reaction model in the thickness direction of the electrode, and compares the distribution with a specified range in the positive electrode, and transmits a command to the output control unit on the basis of a result of the comparison, and the output control unit controls an output voltage and/or an output curre

Abstract: A control apparatus controls a charging device that is connected to a secondary battery having a negative electrode which is a mixture of graphite and silicon monoxide and supplies a current to the secondary battery, wherein when a calculated SOC (State of Charge) of the secondary battery is less than 15%, a magnitude of the current supplied to the secondary battery by the charging device is controlled to a first value, and when the calculated SOC of the secondary battery is equal to or more than 15%, the magnitude of the current supplied to the secondary battery by the charging device is controlled to a second value that is larger than the first value.

Abstract: A pulse extraction device that can finely divide a waveform representing the charge amount (SOC) is provided. A pulse extraction device includes a pulse extraction part configured to extract a pulse based on a change point at which an increase or decrease changes in time series data of a charge amount of a secondary battery.

Abstract: A resistance calculation device includes: a characteristic calculation portion configured to calculate a shrinkage rate for each single electrode based on a capacity shift amount of a positive electrode of a deteriorated secondary battery, a capacity shift amount of a negative electrode of the deteriorated secondary battery, a deterioration amount of the positive electrode, and a deterioration amount of the negative electrode, and to calculate a curve representing characteristics of a state of charge and an open circuit voltage of an equivalent circuit of the deteriorated secondary battery by deforming an opening end potential curve for each single electrode before deterioration of the deteriorated secondary battery by the shrinkage rate for each single electrode based on a fixed point; a change amount calculation portion configured to calculate an amount of change in the open circuit voltage of the equivalent circuit based on a difference between the opening end potential curve for each single electrode befo

Abstract: A measurement device including an impedance calculator configured to perform following processes S1 to S5 is provided: S1: preparing a Bode diagram; S2: extracting a peak from the Bode diagram; increasing the number of RC parallel circuits by +1, and fitting a mountain shape which is able to be represented by an RC parallel circuit centered on the peak; S3: subtracting a Bode diagram component which is able to be represented by the fitted RC parallel circuit from the Bode diagram of the measurement results; S4: ending identification of the number of RC parallel circuits when a peak is not extracted from the Bode diagram and repeating the processes (S2) and S(3) when a peak is extracted; and S5: reporting the total number of RC parallel circuits.

Abstract: A control device includes a total characteristic value calculation part configured to calculate a total characteristic value showing a total characteristic change of a battery, a local characteristic value estimation part configured to estimate a local characteristic value showing a local characteristic change of the battery, and a current controller configured to control a current flowing to the battery on the basis of a ratio between the total characteristic value and the local characteristic value.

Abstract: A battery characteristic estimation device includes a first calculation part configured to calculate a first electrical characteristic value of a secondary battery on the basis of frequency-dependent data that is data of an output voltage of the secondary battery changed by a frequency of alternating current applied to the secondary battery, a second calculation part configured to calculate a second electrical characteristic value of the secondary battery on the basis of transient response data that is data of the output voltage of the secondary battery attenuated by a change in direct current applied to the secondary battery, and an estimation part configured to estimate an electrical characteristic value of the secondary battery on the basis of the first electrical characteristic value and the second electrical characteristic value.