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公开(公告)号：US11592488B2
公开(公告)日：2023-02-28
申请号：US16284442
申请日：2019-02-25
Applicant: DENSO CORPORATION
Inventor： Ichiro Yamada , Nobuo Yamamoto , Shuhei Yoshida
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.
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公开(公告)号：US11340277B2
公开(公告)日：2022-05-24
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.
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公开(公告)号：US11316215B2
公开(公告)日：2022-04-26
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 , H01M10/617 , H01M10/6557 , H01M10/0525 , H01M10/647 , H01M50/20
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 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.
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公开(公告)号：US20250015347A1
公开(公告)日：2025-01-09
申请号：US18893039
申请日：2024-09-23
Applicant: DENSO CORPORATION
Inventor： Yuta SHIMONISHI , Shuhei Yoshida , Hitoshi Onodera
Abstract: A secondary battery includes a positive electrode, a negative electrode, an electrolyte layer, and a shut layer. The electrolyte layer is made of an electrolyte material having lithium ion conductivity. The shut layer contains a lithium ion conductive solid material having lithium ion conductivity. The electrolyte layer is interposed between the negative electrode and the shut layer. The shut layer is made of only a lithium ion conductive solid material or a mixture of the lithium ion conductive solid material. The lithium ion conductive solid material is at least one of a pyrochlore solid electrolyte, a NASICON solid electrolyte, and a perovskite solid electrolyte. The lithium ion conductive solid material has a larger decrease in lithium ion conductivity when in contact with lithium metal than the electrolyte material.
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公开(公告)号：US11150309B2
公开(公告)日：2021-10-19
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 , G01R31/367 , G01R31/389 , H02J7/00
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.
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Patent Agency Ranking
6.发明申请Positive-Electrode Active Material, Manufacturing Method Of The Same, And Nonaqueous Electrolyte Rechargeable Battery Having The Same 审中-公开正极活性物质及其制造方法，以及具有该正极活性物质的非水电解质可充电电池公开(公告)号：US20140065481A1
公开(公告)日：2014-03-06
申请号：US14012253
申请日：2013-08-28
Applicant: Tokyo Metropolitan University , Denso Corporation
Inventor： Shuhei Yoshida , Daisuke Shibata , Kiyoshi Kanamura
CPC classification number: H01M4/366 , H01M2/0222 , H01M4/22 , H01M4/5825 , H01M4/587 , H01M4/62 , H01M10/052 , H01M10/4235 , H01M2220/30
Abstract: A positive-electrode active material for a non-aqueous electrolyte rechargeable battery includes a core portion and a shell portion. The core portion contains an inorganic oxide with a polyanionic structure. The shell portion coats the core portion. The shell portion contains a carbon and an inorganic accelerator that accelerates generation of the shell portion by the carbon. The content of the inorganic accelerator is 0.2 mass % or more of the inorganic oxide when the mass of the inorganic oxide is defined as 100%.
Abstract translation: 用于非水电解质可再充电电池的正极活性材料包括芯部和壳部。 核心部分含有具有聚阴离子结构的无机氧化物。 外壳部分涂覆芯部。 壳部分含有碳和无机促进剂，其通过碳加速壳部分的产生。 当无机氧化物的质量定义为100％时，无机促进剂的含量为无机氧化物的0.2质量％以上。
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公开(公告)号：US11577620B2
公开(公告)日：2023-02-14
申请号：US17182897
申请日：2021-02-23
Applicant: DENSO CORPORATION
Inventor： Yuta Shimonishi , Shuhei Yoshida
Abstract: An information calculation system acquires a battery load history of a secondary battery that has been used. The information calculation system calculates first degradation states of a plurality of battery constituent elements of the secondary battery, based on the battery load history acquired and a plurality of degradation factors related to each of the battery constituent elements. The information calculation system acquires estimated load information on a load that is estimated to act on the secondary battery when the secondary battery is used in a future application. The information calculation system calculates future second degradation states of the plurality of battery constituent elements of the secondary battery when the secondary battery is used in the future application, based on the first degradation states related to the battery constituent elements calculated, the estimated load information acquired, and the plurality of degradation factors related to the battery constituent elements.
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公开(公告)号：US10439209B2
公开(公告)日：2019-10-08
申请号：US14994247
申请日：2016-01-13
Applicant: DENSO CORPORATION
Inventor： Koji Ohira , Daisuke Shibata , Shuhei Yoshida , Keita Takahashi
Abstract: An electrode includes an electrode material, which includes: a core part made of an active substance having a polyanion structure having Mn; and a shell part obtained by covering a surface of the core part with carbon. In addition, an amount of water, as measured by Karl Fischer's method when the electrode is held at 250° C. for 40 minutes after adsorbed water is volatilized by heating, is 1500 ppm or less.
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公开(公告)号：US20160211515A1
公开(公告)日：2016-07-21
申请号：US14994247
申请日：2016-01-13
Applicant: DENSO CORPORATION
Inventor： Koji Ohira , Daisuke Shibata , Shuhei Yoshida , Keita Takahashi
IPC: H01M4/36 , H01M4/587 , H01M10/0525 , H01M4/58
CPC classification number: H01M4/366 , H01M4/136 , H01M4/525 , H01M4/5825 , H01M4/625 , H01M10/0525
Abstract: An electrode includes an electrode material, which includes: a core part made of an active substance having a polyanion structure having Mn; and a shell part obtained by covering a surface of the core part with carbon. In addition, an amount of water, as measured by Karl Fischer's method when the electrode is held at 250° C. for 40 minutes after adsorbed water is volatilized by heating, is 1500 ppm or less.
Abstract translation: 电极包括电极材料，其包括：由具有Mn的聚阴离子结构的活性物质制成的芯部; 以及通过用碳覆盖芯部的表面而获得的壳部。 此外，当电极在吸附水后在250℃下保持40分钟时，通过卡尔·费休法测量的水量通过加热而挥发为1500ppm或更少。
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公开(公告)号：US20240272235A1
公开(公告)日：2024-08-15
申请号：US18646120
申请日：2024-04-25
Applicant: DENSO CORPORATION
Inventor： Yuta SHIMONISHI , Shuhei Yoshida
IPC: G01R31/392 , G01N27/02 , G01R31/367 , G01R31/389 , G01R31/396
CPC classification number: G01R31/392 , G01N27/026 , G01R31/367 , G01R31/389 , G01R31/396
Abstract: A battery diagnostic system that estimates SOH indicating a degree of deterioration of a secondary battery includes a model section, a SOH calculation section, and a SOH estimation section. The model section acquires usage history data indicating an usage state of the secondary battery, and calculates the SOH based on the usage history data. The SOH calculation section acquires physical quantities that change depending on the degree of deterioration of the secondary battery as sensing data, and calculates the SOH based on the sensing data. Based on the SOH calculated by the model section and the SOH calculated by the SOH calculation section, the SOH estimation section combines both calculation results to estimate an optimal SOH.
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