Abstract: A power supply system includes a plurality of sweep modules. Each sweep module includes a battery module, an input and output circuit, a switching element, a capacitor, and a line. The input and output circuit connects the battery module to a main line. The switching element switches between connection and disconnection between the battery module and the main line. The capacitor is attached in parallel to the battery module. The line connects the input and output circuit to the battery module. The line is maintained in a state in which a loop portion is formed.

Abstract: The present teaching provides a power supply system capable of appropriately performing replacement or repairing of a component of a module where a problem occurs without stopping the entire operation, in a case where the problem occurs in of the module in a plurality of modules. The power supply system includes a plurality of sweep modules, a problem detector, an indicator, and a controller. Each sweep module includes a battery module and an electric power circuit module. The problem detector detects a problem for each sweep module. The indicator indicates a sweep module in which a problem is detected. In a case where a problem is detected in the sweep module (S4: YES), the controller causes the indicator to indicate a failure sweep module in which the problem is detected (S5). The controller disconnects the failure sweep module from a main line, and continues sweep control (SG through S8).

Abstract: A power supply system includes a controller, and a plurality of battery modules. The battery modules are connected in series, according to a gate drive signal from the controller, to provide series connection, and each of the battery modules has a disconnecting device configured to force the battery module to be disconnected from the series connection. The controller is configured to estimate the internal resistance of the battery module disconnected from the series connection by the disconnecting device, from a module voltage of the battery module before the battery module is disconnected from the series connection, a module voltage immediately after the battery module is disconnected, and a module current delivered from the battery module.

Abstract: Provided is a power supply device which includes a plurality of battery modules each having a secondary battery and in which the battery modules are connected in series with one another according to a gate driving signal from a controller. An SOC control target value that is a target value for states-of-charge of the battery modules is changed according to the number of the battery modules that are available to be connected in series.

Abstract: Provided is a power supply device which includes a plurality of battery modules and in which the battery modules are connected in series with one another in accordance with a gate driving signal from a controller. The power supply device includes a disconnecting part configured to forcibly isolate the battery module from a series connection regardless of the gate driving signal, and limits, in accordance with a target output voltage value, a number of the battery modules to be forcibly isolated by the disconnecting part.

Abstract: There is provided a power supply device including a plurality of battery modules, the battery modules being connected in series with one another according to a gate driving signal from a controller, the power supply device transmitting the gate driving signal from upstream of the series connection toward downstream of the series connection after the gate driving signal is delayed at delay circuits included in the respective battery modules, and returning the gate driving signal to the controller from a most downstream battery module, wherein the power supply device performs malfunction determination of the delay circuits based on a time difference from a transmission time of a signal from the controller to a reception time of the signal.

Abstract: A power supply device includes a plurality of battery modules, the battery modules are connected to one another in series according to a gate driving signal from a controller, the power supply device delays the gate driving signal in a gate driving signal processing circuit included in each of the battery modules, and thereafter, transmits the gate driving signal from an upstream to a downstream of the series connection, and the power supply device controls the battery modules by superimposing a control signal for the battery module on the gate driving signal.

Abstract: In a power supply device including a plurality of battery modules each including a secondary battery, in which the battery modules are connected in series to one another according to a gate driving signal from a controller and in each of the battery modules, the gate driving signal is delayed in a gate driving signal processing circuit included in the battery module and then transmitted from upstream to downstream of the series connection, an ID is provided for each of the battery modules by transmitting an ID setting signal for providing an ID unique to the battery module using a gate signal line for transmitting the gate driving signal.

Abstract: A vehicle includes a secondary battery and a display device. The secondary battery is mounted on the vehicle as a power source. The display device is configured to display an indicator that indicates a capacity retention rate of the secondary battery at a current point in time. The capacity retention rate is a ratio of a capacity of the secondary battery at the current point in time to a reference capacity of the secondary battery. The reference capacity is set in advance based on a virtual capacity of the secondary battery after a lapse of a predetermined period from manufacture of the vehicle.

Abstract: A controller performs processing including estimating a current degree of deterioration based on battery use history data when it is determined that deterioration diagnosis timing has come, setting a deterioration curve, setting a deterioration straight line, obtaining an elapsed time, obtaining a capacity retention based on the elapsed time and the deterioration straight line, updating representation of the capacity retention on an output unit, and showing an initial value as the capacity retention when it is determined that the deterioration straight line has not been set.

Abstract: A display device includes: a display unit configured to display an index corresponding to a deterioration state of a secondary battery and an EV travelable distance; and a control unit configured to control display of the display unit such that a first decreasing amount by which the EV travelable distance displayed on the display unit decreases with the elapse of time until a predetermined condition has been satisfied is less than a second decreasing amount by which the EV travelable distance displayed on the display unit decreases with the elapse of time after the predetermined condition has been satisfied.

Abstract: A display device includes: a display unit configured to display a degradation level of a secondary battery; and a controller configured to calculate the degradation level from measurement data of the secondary battery in every predetermined period and to control the display unit so as to display the degradation level. The controller is configured to, when a first degradation level indicating a newly calculated degradation level is lower than a second degradation level indicating a previously calculated degradation level, correct the first degradation level to a value equal to or higher than the second degradation level and to control the display unit so as to display the corrected degradation level.

Abstract: A vehicle includes a battery that is mounted as a power source in the vehicle and an instrument panel that displays, to a user of the vehicle, an index (a capacity retention ratio Q or an electric vehicle (EV) travelable distance) indicating a larger value as deterioration of the battery progresses less. The instrument panel displays a maximum value of the index until a predetermined condition has been satisfied.

Abstract: A vehicle includes a controller and a display. The controller is configured to calculate a capacity retention (a degree of deterioration) based on measurement data of a main battery. The controller estimates an upper limit value and a lower limit value of an error (range) of the calculated capacity retention. The controller calculates a capacity retention range including the upper limit value Wu and the lower limit value. The controller has the display show the calculated capacity retention range.

Abstract: Provided is a full-charge-capacity estimating device that has one or more of a plurality of battery modules, as battery-modules-to-be-measured, charged or discharged by means of a first switch element and a second switch element according to whether a power supply device is in a powering state or a regenerating state, measures an integrated current value and a change in the state-of-charge of the battery-module-to-be-measured, and then estimates the full charge capacity of the battery-module-to-be-measured from the integrated current value and the change in the state-of-charge.

Abstract: A method for determining a state of a rechargeable battery includes obtaining a complex impedance measured by applying AC voltage or AC current to a rechargeable battery that is subject to determination and determining a state of the rechargeable battery based on the obtained complex impedance. The determining a state of the rechargeable battery includes determining whether or not a first capacity shift is occurring based on a comparison of a value of the complex impedance at a predetermined frequency with a first determination value used to determine a negative electrode capacity shift, and when determined that the first capacity shift is not occurring, determining whether or not a second capacity shift is occurring based on a comparison of a gradient of the complex impedance with respect to a real axis in a diffusion resistance region with a second determination value used to determine a positive electrode capacity shift.

Abstract: An analysis device determines, by the Maharanobis-Taguchi system using a plurality of explanatory variables, to which of a first group and a second group a module representing a nickel metal hydride battery will belong when the module is subjected to capacity restoration processing, the first group being defined as a group of modules of which battery capacity is lower than a reference capacity, the second group being defined as a group of modules of which battery capacity is higher than a reference capacity. The plurality of explanatory variables include a plurality of feature values extracted from a Nyquist plot of the module. The plurality of feature values include at least two AC impedance real number components plotted in a semicircular portion, at least two AC impedance imaginary number components plotted in the semicircular portion, and at least one AC impedance imaginary number component plotted in a linear portion.

Abstract: A trained neural network model is a neural network model which has been trained based on Nyquist plots of a plurality of modules of which full charge capacity is within a reference range. A processing system determines to which of a first group of modules of which full charge capacity is within the reference range and a second group of modules of which full charge capacity is out of the reference range a module belongs, based on discriminant analysis in which at least one feature value extracted from the Nyquist plot of the module is adopted as an explanatory variable. When the processing system determines that the module M belongs to the first group, the processing system estimates a full charge capacity of the module by using the trained neural network model.

Abstract: A battery information processing system processes information for estimating a full charge capacity of a module. The battery information processing system includes a storage device configured to store a trained neural network model and an analysis device configured to estimate a full charge capacity of a secondary battery from a result of measurement of an AC impedance of the module by using the trained neural network model. The trained neural network model includes an input layer given a numeric value for each pixel of an estimation image in which a Nyquist plot representing the result of measurement of the AC impedance of the module is drawn in a region consisting of a predetermined number of pixels.

Abstract: A cooling system includes a cooling fan that blows cooled air to a main battery and a temperature sensor. When the temperature of the main battery is equal to or higher than a first predetermined temperature after start up of an electric drive vehicle, the cooling fan is driven with a constant command value for a predetermined time period and detection process of abnormal condition is performed for detecting presence or absence of abnormal condition of the cooling fan based on an actual rotation speed of the cooling fan. When the start up of the electric drive vehicle is based on an external charging operation of the secondary battery, driving of the cooling fan with the constant command value is inhibited. This structure ensures sufficient opportunities for detecting presence or absence of abnormal condition of the cooling fan.