Abstract: A non-transitory computer-readable recording medium has stored therein an information processing program that causes a computer to execute a process including acquiring training data in which structural information of a protein is used as input data and a difference between reference energy specified based on energy corresponding to the protein and the energy is used as correct data and training a model for inferring energy of the protein based on the training data.

Abstract: A molecular dynamics computation device includes a processor that executes a procedure. The procedure includes: executing machine learning of a first force field for predicting energy for an input structure using, as training data, a structure of a coarse-grained model resulting from coarse-graining an all-atom model sampled by molecular dynamics computation based on an all-atom force field and an energy corresponding to the all-atom model structure; and computing molecular dynamics of a coarse-grained model based on a second force field obtained by combining the first force field that has been subjected to machine learning and an energy based on a coarse-grained model structure.

Abstract: A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

Abstract: A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

Abstract: A recovery method for a secondary battery having a structure in which positive electrodes and negative electrodes are laminated. The recovery method includes a first compression for compressing at least a part of the secondary battery; a second compression for compressing the secondary battery by applying a load from an outside of the secondary battery when an amount of decrease in electrical resistance of the secondary battery by the first compression is greater than a predetermined value; and a recovery for charging the secondary battery, while the load that compresses the secondary battery is applied to the secondary battery, upon determining that the increase in electrical resistance due to the distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery.

Abstract: A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

Abstract: A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

Abstract: A method for charging a battery that is a non-aqueous electrolyte secondary battery includes first and second steps. The first step is estimating an SOC of the battery based on at least one of a voltage and a current of the battery. The second step is, based on a relationship between the SOC of the battery and an entropy change ?S, determining a maximum charging current to the battery in accordance with the SOC of the battery such that the maximum charging current becomes larger as the entropy change of the battery becomes greater.

Abstract: A diagnostic apparatus for a secondary battery includes a control device. The control device acquires an electricity storage amount that is the amount of electricity stored in the secondary battery, and V/K indicating the magnitude of change in OCV of the secondary battery with respect to temperature change of the secondary battery. The control device determines whether or not an SOC unevenness occurs in an electrode surface of the secondary battery by using the acquired electricity storage amount and V/K.

Abstract: A method of estimating a deteriorated state of a battery includes steps S102 to S110. S102 is a step of obtaining a voltage and a current of the battery a plurality of times for a data acquisition period. S104 is a step of calculating an amount of change in current, an amount of change in temperature, and an amount of change in SOC during the data acquisition period. S106 is a step of obtaining an allowable amount of change in current, an allowable amount of change in temperature, and an allowable amount of change in SOC based on an average temperature. S110 is a step of calculating an impedance component for each frequency bandwidth based on the voltage and the current by subjecting the voltage and the current to Fourier transform when all amounts of change are smaller than the allowable amounts of change.

Abstract: A battery system includes a battery pack including a plurality of cells, and an ECU. The ECU calculates a current distribution in each cell using a ladder circuit network model, the ladder circuit network model being obtained by geometrically modeling an interior of the cell using a plurality of resistance elements and a plurality of power storage elements. The ECU calculates the current distribution in the cell by applying, to the ladder circuit network model, a resistance distribution in the cell calculated based on a salt concentration distribution in the cell.

Abstract: The first step includes performing FFT for a voltage and a current of a battery a plurality of times to thereby calculate the voltage and the current for each frequency. The second step includes determining whether or not the first condition and the second condition are satisfied for the current of the battery that is calculated for each frequency. The third step includes calculating an impedance component of the battery for each frequency range when at least one of the first condition and the second condition is not satisfied, and not calculating the impedance component of the battery for each frequency range when each of the first condition and the second condition is satisfied. The first condition shows that the current in a low frequency range is greater than a reference value. The second condition shows that the current in a frequency range is less than a reference value.

Abstract: A controller of a deterioration estimation device for a secondary battery is configured to acquire a first open circuit voltage when a temperature of the secondary battery is a first temperature and a second open circuit voltage when the temperature of the secondary battery is a second temperature changed from the first temperature, and estimate a degree of deterioration of the secondary battery by using a difference between first and second slopes. The first slope is a ratio of a voltage change obtained by subtracting the first open circuit voltage from the second open circuit voltage to a temperature change obtained by subtracting the first temperature from the second temperature. The second slope is a ratio of the voltage change to the temperature change when the temperature of the new secondary battery has changed from the first temperature to the second temperature.

Abstract: A diagnostic apparatus for a secondary battery includes a control device. The control device acquires an electricity storage amount that is the amount of electricity stored in the secondary battery, and V/K indicating the magnitude of change in OCV of the secondary battery with respect to temperature change of the secondary battery. The control device determines whether or not an SOC unevenness occurs in an electrode surface of the secondary battery by using the acquired electricity storage amount and V/K.

Abstract: A diagnostic device for a secondary battery having a structure in which positive electrodes and negative electrodes are alternately arranged includes an electronic control unit. The electronic control unit is configured to acquire a first resistance value indicating a magnitude of electrical resistance of the secondary battery, compress at least a part of the secondary battery, acquire a second resistance value indicating a magnitude of electrical resistance of the secondary battery after the compression, determine, using the first and second resistance values, whether an amount of decrease in electrical resistance of the secondary battery by the compression is greater than a predetermined value, and determine whether an increase in resistance due to distortion of at least one of the positive electrodes and the negative electrodes occurs in the secondary battery using a result of the determination.

Abstract: A control device calculates an amount of increase ?Am in freezing temperature measurement value Am from an initial freezing temperature ?0 and calculates an amount of lowering in capacity corresponding to the amount of increase ?Am in freezing temperature as an amount of lowering in capacity ?Bx due to deterioration of a material. The control device calculates an amount of lowering in capacity measurement value Bm from an initial capacity B0 as a whole amount of lowering in capacity ?Bm and calculates a material deterioration ratio X by using ?Bx and ?Bm. The control device calculates a value resulting from subtraction of ?Bx from ?Bm as an amount of lowering in capacity ?By due to precipitation of Li and calculates an Li precipitation deterioration ratio Y by using ?By and ?Bm.

Abstract: A method for charging a battery that is a non-aqueous electrolyte secondary battery includes first and second steps. The first step is estimating an SOC of the battery based on at least one of a voltage and a current of the battery. The second step is, based on a relationship between the SOC of the battery and an entropy change ?S, determining a maximum charging current to the battery in accordance with the SOC of the battery such that the maximum charging current becomes larger as the entropy change of the battery becomes greater.

Abstract: In a method for charging a battery, the battery is a lithium ion battery including a graphite-containing negative electrode. A stage structure of the graphite is classified into a stage 1 to a stage 4 . The battery includes: an SOC region where the stage 4 and the stage 3 coexist; an SOC region where the stage 3 and the stage 2 coexist; and an SOC region where the stage 2 and the stage 1 coexist. The method includes first and second steps. The first step is estimating an SOC of the battery based on at least one of a voltage and a current of the battery. The second step is determining a charging current to the battery in accordance with the SOC of the battery such that the charging current in the SOC region is larger than the charging current in the SOC regions.

Abstract: The present invention provides a battery pack in which a plurality of unit cells and one or a plurality of spacers are alternately arranged in a predetermined arrangement direction and a load is applied in the arrangement direction. The unit cell includes an electrode body having a reaction section, and a battery case having long side surfaces. The spacer includes, on a surface facing the unit cell, a first pressing portion that presses a part of the reaction section. The first pressing portion is configured to press each of the center portion and a pair of end portions of the reaction section in a width direction over the entire length in a vertical direction, and not to press a lower region, which is ? of the reaction section from the lower end in the vertical direction, over a length of ½ or more in the width direction.

Abstract: The present invention provides a battery pack in which a plurality of unit cells and one or a plurality of spacers are alternately arranged in a predetermined arrangement direction and a load is applied in the arrangement direction. The unit cell includes an electrode body having a reaction section, and a battery case having long side surfaces. The spacer includes, on a surface facing the unit cell, a first pressing portion that presses a part of the reaction section. The first pressing portion is configured to press each of the center portion and a pair of end portions of the reaction section in a width direction over the entire length in a vertical direction, and not to press a lower region, which is ? of the reaction section from the lower end in the vertical direction, over a length of ½ or more in the width direction.