Abstract: In a battery abnormality detection system, a data acquirer acquires voltage data and current data of each cell of a battery pack having a plurality of cells connected in series or of each parallel cell block of a battery pack having serially connected parallel cell blocks having a plurality of cells connected in parallel. The abnormality detector detects a cell or parallel cell block in an abnormal state on the basis of a relative voltage change amount among the plurality of cells or among the plurality of parallel cell blocks in a constant voltage charging period.

Abstract: A manufacturing device acquires a plurality of pieces of first log data indicating the state of a battery during charge or discharge acquired from a battery-equipped device and a plurality of first degradation levels of the battery, calculates reliability of the respective first degradation levels based on charge or discharge corresponding to the respective pieces of first log data, and outputs a model evaluated to have the best accuracy in estimating the degradation level of the battery out of a model obtained through machine learning of a relationship between the plurality of first degradation levels and the plurality of pieces of first log data, and a model obtained through machine learning of a relationship between first degradation levels having reliability greater than or equal to a predetermined value and first log data corresponding to such first degradation levels.

Abstract: A data acquirer acquires voltage data and current data of a plurality of cells in a battery pack including the plurality of cells connected in series, or voltage data and current data of a plurality of parallel cell blocks in a battery pack including the plurality of parallel cell blocks each including a plurality of cells connected in parallel. Based on the voltage data and the current data of each of the cells or each of the parallel cell blocks, a dV/dQ estimator estimates dV/dQ indicating a differential value of the voltage with respect to the capacity of each of the cells or each of the parallel cell blocks. A determiner determines whether or not a micro-short circuit has occurred in the battery pack based on a change in variation of characteristic points of dV/dQ between the plurality of cells or the plurality of parallel cell blocks.

Abstract: A multicore cable according to one embodiment of the present disclosure includes a core wire including a plurality of core electric wires stranded together; and a sheath layer disposed around the core wire, wherein each of the core wires includes a conductor including a plurality of elemental wires twisted together and an insulating layer that covers an outer periphery of the conductor, wherein the sheath layer includes an inner sheath layer and an outer sheath layer covering the inner sheath layer, wherein a main component of the inner sheath layer is a copolymer of ethylene and (meth) acrylic acid alkyl ester, and wherein a content of the (meth) acrylic acid alkyl ester in the copolymer is more than 7 mass %.

Abstract: In a battery abnormality detection system, a data acquirer acquires a current flowing through a battery and a temperature of the battery. A determiner determines presence or absence of abnormal heat generation of the battery based on a relation between an amount of the current flowing through the battery in a certain period and a temperature rise of the battery in the certain period. The determiner determines the presence or absence of the abnormal heat generation of the battery based on the current and the temperature of the battery in a charging period in which the temperature of the battery exceeds a set temperature.

Abstract: A data acquisition unit acquires temperature data for a plurality of battery packs mounted on different equipment (e.g., electric-powered vehicle) in a predetermined period. A statistical calculation unit calculates, for each battery pack, a statistical value based on a temperature change rate in a plurality of charging periods included in the predetermined period. A determination unit determines a temperature adjustment function of the equipment for which a deviation of the statistical value based on the temperature change rate is equal to or greater than a threshold value to be abnormal.

Abstract: A battery abnormality detection system includes the following constituents. A battery data acquisition unit acquires voltages of one of a plurality of cells and a plurality of parallel cell blocks in a battery pack and temperatures at a plurality of observation points respectively measured by a plurality of temperature sensors provided in the battery pack. A determination unit determines presence or absence of an abnormality in one of a specific cell and a specific parallel cell block, based on a transition of a voltage of the one of the specific cell and the specific parallel cell block in a predetermined period in the battery pack and on a difference between a temperature change at a first observation point and a temperature change at a second observation point in the predetermined period in the battery pack.

Abstract: A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials. The equivalent circuit model is a model including a diffusion resistance component for each of the plurality of materials for use in the positive electrode and the negative electrode.

Abstract: An information processing method executed by a computer includes: acquiring an acceleration request for a mobile body that moves using a battery; calculating an output current in the battery based or the acceleration request; calculating a degradation degree of the battery based on the output current; generating an acceleration control instruction in response to the acceleration request in accordance with the degradation degree of the battery; and outputting the generated acceleration control instruction.

Abstract: A controller executes an equalization process of equalizing capacities of a plurality of cells, and a cell abnormality determination process of, of detected voltages of the plurality of cells, calculating a voltage difference between a representative voltage based on the detected voltage of at least one cell to be compared and the detected voltage of one cell to be detected at a first time and a second time, and when a difference between the two voltage differences is greater than or equal to a threshold value, determining that the cell to be detected is abnormal. In the case of executing the cell abnormality determination process during the equalization process, the controller provides the detected voltage of a target cell to be subjected to the equalization process with a compensation value corresponding to a voltage change based on energy transfer in the target cell due to the equalization process between the first time and the second time, and calculates the voltage difference at the second time.

Abstract: A non-ohmic composition including a base elastomer and a plurality of non-ohmic particles, wherein, in a case of comparing volume resistivities ? for the non-ohmic composition within a range of E?Eth for the non-ohmic composition not elongated, the E being an electric field strength applied to the non-ohmic composition, the ? being the volume resistivity of the non-ohmic composition, and the Eth being a threshold electric field strength at a point where an absolute value of a variation in a slope of log ? with respect to log E is maximum, the volume resistivity ? for the non-ohmic composition uniaxially elongated by 50% is 50 times or less the volume resistivity ? for the non-ohmic composition not elongated.

Abstract: In a battery abnormality prediction system, an acquisition unit acquires a current flowing through a battery and a temperature of the battery. A prediction unit predicts the occurrence of an abnormality in the battery, based on a relationship between the amount of the current flowing through the battery for a certain period of time and a rise in the temperature of the battery for the certain period of time. The prediction unit may compare the ratio of an integrated amount of current to the temperature rise for the certain period of time with a threshold determined based on data on the battery having caught fire and thereby predict a sign of fire to be caught by the battery.

Abstract: Provided is a controller configured: to calculate, among voltages detected from a plurality of cells, a voltage difference between the voltage detected from one cell of the plurality of cells, the one cell to be detected, and a representative voltage at each of a first time and a second time, the representative voltage based on the voltage detected from at least one cell of the plurality of cells, the at least one cell to be compared; and when a discrepancy between the voltage difference at the first time and the voltage difference at the second time is equal to or more than a threshold, to determine that an abnormality has occurred in the one cell to be detected.

Abstract: An information processing device acquires power consumption information indicating information corresponding to a power consumption amount per use unit of an electric apparatus driven by a battery; acquires initial capacity information indicating an initial capacity of the battery; calculates a first end of life of the battery on the basis of the power consumption information and the initial capacity information; acquires a second end of life of the battery set according to characteristics of the battery; and outputs a shorter one of the first end of life and the second end of life as a third end of life of the battery.

Abstract: The power conditioner determines possible total power and working individual power to be in a range that possible individual power of each of the power supply units is not exceeded. The possible total power is determined from the possible individual power, of each of the power supply units, determined based on the battery information detected by each of the unit controllers, collected by a master controller from each of the unit controllers. The working individual power is determined based on a power deviation indicating a difference of charging and discharging power between the power supply units. The power conditioner causes charging and discharging of each of the power supply units within the calculated working individual power.

Abstract: A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell, and a state of charge (SOC) of the battery cell is estimated based on the estimated OCV, SOC-OCV characteristics on a charge side of the battery cell, and SOC-OCV characteristics on a discharge side of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials.

Abstract: An information processing device acquires movement plan information including a total moving distance per unit period of a plurality of movable bodies; acquires relationship information indicating a relationship between a moving distance per the unit period of the movable body and a deterioration degree of the battery; acquires first cost information for calculating a first cost varying with the number of the movable bodies and second cost information for calculating a second cost varying with the deterioration degree of the battery; and determines a planned number of movable bodies, the planned number being the number of the movable bodies for use in a movement plan and being the number of the movable bodies having a total of the first cost and the second cost satisfying a predetermined requirement, on the basis of the movement plan information, the relationship information, the first cost information, and the second cost information.

Abstract: An information processing device acquires charge/discharge information indicating a charge/discharge amount per unit period of a battery having a plurality of cells; acquires first relationship information indicating a relationship between the charge/discharge amount per the unit period and a deterioration degree of the battery; acquires second relationship information indicating a relationship between an elapsed time or the charge/discharge amount, and a voltage difference generated between the plurality of cells; acquires first cost information indicating a first cost generated by deterioration of the battery and second cost information indicating a second cost required for reducing the voltage difference; and determines, on the basis of the charge/discharge information, the first and second relationship information, and the first cost and second information, work timing at which the work in a charge/discharge plan is performed, the work timing being timing at which a sum of the first and second cost satisf

Abstract: In an arithmetic system, a data acquisition unit acquires operation data at least including a voltage of a battery mounted on an identical product (for example, an electrically-driven vehicle of an identical vehicle type) and a state of charge (SOC) from a plurality of individuals of the product via a network. A detector statistically processes the plurality of pieces of acquired operation data to detect an individual on which a battery different from specifications of the product is mounted.

Abstract: In a calculation system, a data acquisition unit is configured to acquire operation data of a battery, the operation data including at least voltages and currents measured by a management device at a plurality of time points, and states of charge (SOCs) estimated based on at least one of the voltages and the currents, the management device being configured to manage the battery. An extraction unit is configured to, extract, as sample data, a set of an SOC and a voltage from sets of the SOCs and the voltages the plurality of time points included in the operation data in a period in which the battery is regarded as resting, the period being specified based on the currents. An estimation unit is configured to estimate an SOC-open circuit voltage (OCV) characteristic of the battery based on the extracted sample data.