公开(公告)号：US20210339653A1

公开(公告)日：2021-11-04

申请号：US17377692

申请日：2021-07-16

Applicant: DENSO CORPORATION

Inventor： Nobuo YAMAMOTO ,  Shuhei YOSHIDA ,  Katsuki HAYASHI ,  Takehiko YAMAKI ,  Hiroyasu SUZUKI ,  Yuya MINABE

IPC: B60L58/22 ,  G01R31/392 ,  G01R31/396 ,  G01R31/367 ,  H01M10/48

Abstract: In a system for setting power supply of reusable secondary cell modules, a degradation level estimation unit estimates a degradation level of a cell-module performance of each of a plurality of secondary cell modules, based on: the history information items about the respective the secondary cell modules acquired by a history information collection unit; and the cell-module performances of the respective secondary cell modules collected by a cell performance collection unit. A suppliable quantity prediction unit predicts a suppliable quantity of power of each of the plurality of secondary cell modules in accordance with the degradation level of the cell-module performance of a corresponding one of the plurality of secondary cell modules. A supply balance setting unit sets a power supply balance among the plurality of secondary cell modules based on the suppliable quantity of power of each of the plurality of secondary cell modules predicted by the prediction unit.

公开(公告)号：US20210270907A1

公开(公告)日：2021-09-02

申请号：US17188381

申请日：2021-03-01

Applicant: DENSO CORPORATION

Inventor： Yuta SHIMONISHI ,  Shuhei YOSHIDA

IPC: G01R31/392 ,  H01M10/42 ,  G01R31/367

Abstract: In the battery deterioration prediction system, a polarization calculation unit calculates negative and positive electrode polarizations from negative and positive electrode resistances, and an electrical current value flowing through the secondary battery. A CCP calculation unit calculates a negative electrode closed-circuit potential on the secondary battery negative electrode open circuit potential and the negative electrode polarization calculated by the polarization calculation unit, and calculates a positive electrode closed-circuit potential based on the secondary battery positive electrode open circuit potential and the positive electrode polarization calculated by the polarization calculation unit. A capacity prediction unit predicts the positive/negative electrode capacity, and positive/negative electrode SOC deviation capacity of a secondary battery based on at least one of the closed-circuit potential of the negative and positive electrodes calculated by the CCP calculation unit, and predicts the battery capacity based on the negative and positive electrode capacities, and the positive/negative electrode SOC capacity deviation.

公开(公告)号：US20200259224A1

公开(公告)日：2020-08-13

申请号：US16785982

申请日：2020-02-10

Applicant: DENSO CORPORATION

Inventor： Yuta SHIMONISHI ,  Shuhei YOSHIDA ,  Daisuke SHIBATA ,  Hiroyoshi YAMAMOTO

IPC: H01M10/613 ,  H01M2/10 ,  H01M10/647 ,  H01M10/6557 ,  H01M10/0525 ,  H01M10/617

Abstract: A battery structure includes a plurality of batteries each made of lithium-ion secondary battery; and a plurality of arrangement portions in which the plurality of batteries are arranged. The plurality of arrangement portions are divided into two groups of: a upper heat transfer group having heat transfer orders higher than a center value of the heat transfer orders, where the heat transfer orders are respective amount of heat transfer from the batteries being ranked in descending order; and a lower heat transfer group having the heat m transfer orders lower than the center value. A battery among the plurality of batteries showing the highest value of a lithium deposition tolerance which represents a degree of lithium being unlikely to deposit during charge/discharge operation, is disposed in a high tolerance arrangement portion in the plurality of arrangement portions, the high tolerance arrangement portion belonging to the upper heat transfer group.

公开(公告)号：US20200041576A1

公开(公告)日：2020-02-06

申请号：US16530640

申请日：2019-08-02

Applicant: DENSO CORPORATION

Inventor： Yoshinori SATO ,  Shuhei YOSHIDA ,  Nobuo YAMAMOTO ,  Yuta SHIMONISHI

IPC: G01R31/392 ,  G01R31/389 ,  G01R31/367

Abstract: An apparatus for estimating a degradation degree of a secondary battery includes a pulse current applying unit that applies a pulse current; a voltage acquiring unit that acquires a charge voltage and a discharge voltage which are produced at the secondary battery by applying the pulse current; a relative value calculation unit that calculates a relative value between the charge voltage and the discharge voltage; a correlation storage unit that stores a correlation between a relative value between the charge voltage and the discharge voltage, and a degradation degree of the secondary battery; and a degradation degree estimation unit that obtains a degradation degree of the secondary battery from the correlation storage unit, based on the relative value calculated by the relative value calculation unit.

公开(公告)号：US20150042289A1

公开(公告)日：2015-02-12

申请号：US14451767

申请日：2014-08-05

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Daisuke SHIBATA

IPC: H02J7/00 ,  G01R31/36 ,  H01M10/44

CPC classification number: H01M10/441 ,  G01R31/362 ,  H01M4/505 ,  H01M4/5825 ,  H01M10/0525 ,  H01M10/482 ,  H01M2010/4271 ,  H01M2220/20 ,  H02J7/0016 ,  H02J7/0073 ,  H02J7/008 ,  Y02E60/122 ,  Y02T10/7011 ,  Y02T10/7055

Abstract: An assembled battery includes a plurality of secondary cells, a first arithmetic operator, a second arithmetic operator, and a discharger. The first arithmetic operator calculates a voltage change rate of each of the secondary cells during charging/discharging thereof. The second arithmetic operator determines a discharge condition for each of the secondary cells from the voltage change rate calculated in the first arithmetic operator and a state of charge of each of the secondary cells. The discharger performs discharging of each of the secondary cells on the basis of the discharge condition when the assembled battery is neither being charged nor being discharged. The second arithmetic operator determines the discharge condition of each of the secondary cells such that each of the secondary cells after the discharging has the same state of charge.

Abstract translation: 组合电池包括多个二次电池，第一算术运算器，第二算术运算器和放电器。 第一算术运算器计算每个二次电池在其充电/放电期间的电压变化率。 第二算术运算器根据在第一算术运算器中计算的电压变化率和每个二次电池的电荷状态来确定每个二次电池的放电条件。 当组电池既不充电也不放电时，放电器基于放电条件执行每个二次电池的放电。 第二算术运算器确定每个二次电池的放电条件，使得放电之后的每个二次电池具有相同的充电状态。

公开(公告)号：US20200371145A1

公开(公告)日：2020-11-26

申请号：US16992578

申请日：2020-08-13

Applicant: DENSO CORPORATION

Inventor： Nobuo YAMAMOTO ,  Ichiro YAMADA ,  Shuhei YOSHIDA ,  Masaya NAKAMURA ,  Takehiko YAMAKI ,  Hiroyasu SUZUKI ,  Katsuki HAYASHI

IPC: G01R27/26 ,  G01R31/389 ,  G01R31/388

Abstract: An abnormality determination device for a secondary battery includes an internal-resistance calculation unit, a threshold memory unit, a capacity balance comparison unit, and an abnormality determination unit. The internal-resistance calculation unit detects an internal resistance in a negative-electrode reaction resistance dominant region in which a reaction resistance of a negative electrode is dominant in a charge and discharge reaction of the secondary battery. The threshold memory unit stores a capacity balance threshold used as a reference for determining abnormality in a balance between a capacity of a positive electrode and a capacity of the negative electrode in the secondary battery. The capacity balance comparison unit compares the internal resistance calculated by the internal-resistance calculation unit with the capacity balance threshold stored in the threshold memory unit. The abnormality determination unit determines abnormality in capacity balance in the secondary battery based on a comparison result from the capacity balance comparison unit.

公开(公告)号：US20190265303A1

公开(公告)日：2019-08-29

申请号：US16284442

申请日：2019-02-25

Applicant: DENSO CORPORATION

Inventor： Ichiro YAMADA ,  Nobuo YAMAMOTO ,  Shuhei YOSHIDA

IPC: G01R31/36 ,  H01M10/48

Abstract: A battery monitoring system includes a data acquiring unit and a failure determining unit. The data acquiring unit acquires a plurality of types of monitoring data to monitor a state of a secondary battery. The failure determining unit determines whether the secondary battery has failed. The failure determining unit performs sparsity regularization using the monitoring data as variables and calculates a partial correlation coefficient matrix of the monitoring data. The failure determining unit calculates, as an abnormality level, an amount of change in a partial correlation coefficient, which is a component of the partial correlation coefficient matrix, between two partial correlation coefficient matrices calculated at different periods. The failure determining unit determines that the secondary battery has failed when the calculated abnormality level exceeds a predetermined threshold.

公开(公告)号：US20240380001A1

公开(公告)日：2024-11-14

申请号：US18782847

申请日：2024-07-24

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Hitoshi ONODERA ,  Yuta SHIMONISHI

IPC: H01M10/0562

Abstract: A solid electrolyte for a secondary battery includes an oxide-based solid electrolyte having a pyrochlore structure represented by a composition formula of Aa2−αAb(1+α)/3B2O7−βXβ, where Aa is an alkali metal, Ab contains at least a lanthanide, B is a cationic metal different from Aa and Ab, and X is an anion that is substitutable with an O atom constituting the pyrochlore structure.

公开(公告)号：US20240372159A1

公开(公告)日：2024-11-07

申请号：US18774124

申请日：2024-07-16

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Hitoshi Onodera ,  Yuta Shimonishi

IPC: H01M10/42 ,  H01M10/056

Abstract: An electricity storage device includes a negative electrode, a positive electrode, a polymer electrolyte layer provided between the negative electrode and the positive electrode, an alloy-forming layer capable of forming a lithium alloy, and a polymer electrolyte layer having lithium ion conductivity. The polymer electrolyte layer has lithium ion conductivity. The polymer electrolyte layer and the alloy-forming layer are formed at least on a side of the negative electrode of the electrolyte layer. The alloy-forming layer is located closer to the electrolyte layer. The polymer electrolyte layer is located closer to the negative electrode.

公开(公告)号：US20240250293A1

公开(公告)日：2024-07-25

申请号：US18461545

申请日：2023-09-06

Applicant: DENSO CORPORATION

Inventor： Hitoshi ONODERA ,  Shuhei YOSHIDA ,  Yuta SHIMONISHI

IPC: H01M10/0562 ,  H01M4/62 ,  H01M10/0585 ,  H01M50/431 ,  H01M50/443 ,  H01M50/449

CPC classification number: H01M10/0562 ,  H01M4/62 ,  H01M10/0585 ,  H01M50/431 ,  H01M50/443 ,  H01M50/449 ,  H01M2004/028 ,  H01M2300/0071 ,  H01M2300/008 ,  H01M2300/0094

Abstract: A solid electrolyte for a secondary battery includes a core phase having a particle shape and a shell phase covering at least a part of the core phase. The shell phase consists of one or more phases. A constituent material of the core phase includes a pyrochlore solid electrolyte represented by a composition formula of Aa2−αAb(1+α)/3B2O7−βXβ, where Aa is an alkali metal, Ab is a lanthanoid, B is a cationic metal, and X is an anion that is substitutable with O. A constituent material of the shell phase includes a material having a chemical composition including Li and different from a chemical composition of the pyrochlore solid electrolyte, and having a melting point lower than a melting point of the pyrochlore solid electrolyte.