公开(公告)号：US20230231209A1

公开(公告)日：2023-07-20

申请号：US18074566

申请日：2022-12-05

Applicant: DENSO CORPORATION

Inventor： Yuji YAMAGAMI ,  Masaaki KITAGAWA ,  Hisashi UMEMOTO ,  Shuhei YOSHIDA

IPC: H01M10/48 ,  H01M10/46 ,  H02J7/00

CPC classification number: H01M10/48 ,  H01M10/46 ,  H02J7/00714 ,  H01M2220/20 ,  H01M2010/4292

Abstract: A secondary battery system includes a secondary battery having an electrode body impregnated with an electrolytic solution containing metal ions. The secondary battery system measures an impedance of the secondary battery. The secondary battery system detects high-rate deterioration caused by uneven concentration of the metal ions in the electrolytic solution impregnated into the electrode body.

公开(公告)号：US20160315316A1

公开(公告)日：2016-10-27

申请号：US15133250

申请日：2016-04-20

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Koji OHIRA ,  Masaki UCHIYAMA ,  Daisuke SHIBATA

IPC: H01M4/36 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M4/366 ,  H01M4/13 ,  H01M4/485 ,  H01M4/5825 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021

Abstract: An electrode active material for a nonaqueous electrolyte secondary battery includes: a core part including at least one of an inorganic oxide and a carbon-composite inorganic composite oxide; and a shell part for carbon coating on the core part. The electrode active material has a specific surface area of 6.0 m2/g or more. The electrode active material has a moisture content of 400 ppm or less, which is measured by a Karl Fischer method such that the electrode active material is heated in a heat-evaporating manner, and continuously maintained at 250° C. for 40 minutes without exposing to an atmosphere after the electrode active material is exposed to the atmosphere to absorb moisture to be saturated.

Abstract translation: 非水电解质二次电池用电极活性物质包括：芯部，其包含无机氧化物和碳复合无机复合氧化物中的至少一种; 以及用于在芯部上涂覆碳的外壳部分。 电极活性物质的比表面积为6.0m 2 / g以上。 电极活性物质的水分含量为400ppm以下，通过卡尔费休法测定，使得电极活性物质以热蒸发方式加热，并连续保持在250℃下40分钟而不暴露 在电极活性物质暴露于大气中以吸收水分以饱和之后的气氛。

公开(公告)号：US20240372140A1

公开(公告)日：2024-11-07

申请号：US18774445

申请日：2024-07-16

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Hitoshi ONODERA ,  Yuta SHIMONISHI

IPC: H01M10/0565 ,  H01M4/02 ,  H01M4/134 ,  H01M10/0525

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 and having lithium ion conductivity, an electrolyte layer provided between the negative electrode and the positive electrode and having lithium ion conductivity, and an alloy-forming layer capable of forming an alloy with lithium. The polymer electrolyte layer contains cyclic polycarbonate and chain polycarbonate. The polymer electrolyte layer contains lithium salt. Concentration of lithium salt in the polymer electrolyte layer is 3 mol/L or more. The polymer electrolyte layer and the alloy-forming layer are formed at least on a surface of the electrolyte layer facing the negative electrode. The alloy-forming layer is located closer to the electrolyte layer than the polymer electrolyte layer. The polymer electrolyte layer is located closer to the negative electrode than the alloy-forming layer.

公开(公告)号：US20230417840A1

公开(公告)日：2023-12-28

申请号：US18363511

申请日：2023-08-01

Applicant: DENSO CORPORATION

Inventor： Hiroyoshi YAMAMOTO ,  Shuhei YOSHIDA ,  Yuta SHIMONISHI ,  Sho NAGASHIMA ,  Kazuya TAKIZAWA

IPC: G01R31/396 ,  G01R31/392 ,  G01R31/3842 ,  G01R31/3828 ,  G01R31/36

CPC classification number: G01R31/396 ,  G01R31/392 ,  G01R31/3648 ,  G01R31/3828 ,  G01R31/3842

Abstract: A battery management system includes a usage history acquisition unit, a deterioration estimation unit, a battery load acquisition unit, a deterioration change degree identification unit, and a battery management unit. The usage history acquisition unit acquires usage history information. The deterioration estimation unit estimates a current deterioration state and a deterioration factor of the secondary battery based on the usage history information. The battery load acquisition unit acquires battery load information indicating a future battery load. The deterioration change degree identification unit identifies a deterioration change degree by using the current deterioration state, the deterioration factor and the battery load information of the secondary battery. The battery management unit uses the deterioration change degree to associate secondary batteries with future use modes so that an evaluation value indicating a degree of deterioration of the secondary battery in use devices becomes a minimum value.

公开(公告)号：US20230090001A1

公开(公告)日：2023-03-23

申请号：US18070233

申请日：2022-11-28

Applicant: DENSO CORPORATION

Inventor： Yuji YAMAGAMI ,  Shuhei YOSHIDA ,  Hisashi UMEMOTO

IPC: G01R31/389 ,  G01R31/36 ,  G01R31/392 ,  G01R31/3842

Abstract: A battery diagnostic system includes a superimposed current applying unit, a current value acquiring unit, a voltage value acquiring unit, an impedance calculating unit, and a diagnostic unit. The superimposed current applying unit configured to apply a superimposed current formed by superimposing a plurality of frequency components to a battery. The current value acquiring unit acquires the current value of the superimposed current applied to the battery. The voltage value acquiring unit acquires a battery voltage of the battery to which the superimposed current is applied. The impedance calculating unit calculates impedance for each of a plurality of frequency components using discrete Fourier transform from the superimposed current and the battery voltage. The diagnostic unit diagnoses the battery based on the impedance.

公开(公告)号：US20210268927A1

公开(公告)日：2021-09-02

申请号：US17182897

申请日：2021-02-23

Applicant: DENSO CORPORATION

Inventor： Yuta SHIMONISHI ,  Shuhei YOSHIDA

IPC: B60L53/62 ,  H01M10/42 ,  G05B17/02 ,  G07C5/00 ,  B60L53/66 ,  B60L58/12 ,  B60L58/16 ,  B60L53/63

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.

公开(公告)号：US20250130285A1

公开(公告)日：2025-04-24

申请号：US19007467

申请日：2024-12-31

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Yuji YAMAGAMI

IPC: G01R31/389 ,  G01R31/36 ,  G01R31/367 ,  G01R31/374 ,  G01R31/3842 ,  G01R31/392

Abstract: A thermal runaway sign detection device includes a measurement unit that measures a voltage fluctuation in a first mode in which a number of times that a fluctuating current is output from the secondary battery and voltage fluctuation of the secondary battery in response to the fluctuating current is measured is first number of times, and in a second mode in which the number of times is second number of times less than the first number of times. A detection unit detects a sign of thermal runaway in the secondary battery when a rate of change in a real part of an AC impedance obtained based on the voltage fluctuation measured by the measurement unit at the fluctuating current of a predetermined frequency at which an imaginary part of the AC impedance of the secondary battery calculated based on the voltage fluctuation becomes zero, is greater than a threshold value.

公开(公告)号：US20250020728A1

公开(公告)日：2025-01-16

申请号：US18901670

申请日：2024-09-30

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Isao ISHIBE ,  Kazuo MATSUKAWA ,  Shuhei YOSHIDA ,  Masaki UCHIYAMA

IPC: G01R31/389 ,  G01R31/367 ,  G01R31/387 ,  G01R31/392 ,  H01M10/48 ,  H02J7/00

Abstract: An impedance measurement apparatus is provided for measuring impedance of a secondary battery. The impedance measurement apparatus includes a measurement unit and a switching unit. The measurement unit is capable of measuring the impedance of the secondary battery using a plurality of measurement modes differing in measurement condition. The switching unit is configured to switch between the plurality of measurement modes based on a comparison between a correlating parameter, which correlates with the impedance of the secondary battery, and a threshold value.

公开(公告)号：US20240385250A1

公开(公告)日：2024-11-21

申请号：US18788857

申请日：2024-07-30

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Yuta SHIMONISHI ,  Kazuya TAKIZAWA

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

Abstract: A SOH indicating a deterioration degree of a secondary battery is estimated. SOH information of the secondary battery is acquired. Information indicating a battery state of the secondary battery and information indicating the battery state having a correlation with the SOH higher than a predetermined correlation are acquired. A SOH estimation model is built by synthesizing a regression model using a variance-covariance matrix, in which the SOH information is defined as an output, and the information indicating the battery state that has the correlation with the SOH higher than the predetermined correlation is defined as an input The SOH is estimated by inputting information indicating a current battery state of the secondary battery into the SOH estimation model.

公开(公告)号：US20240094308A1

公开(公告)日：2024-03-21

申请号：US18464303

申请日：2023-09-11

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Masaki UCHIYAMA ,  Hiroki FUJII

IPC: G01R31/396 ,  G01R31/388 ,  G01R31/389 ,  G01R31/392

CPC classification number: G01R31/396 ,  G01R31/388 ,  G01R31/389 ,  G01R31/392

Abstract: A detector includes a measurement unit and a battery control unit. The measurement unit measures a measurement value indicating a battery state of a secondary battery. The battery control unit detects a sign of thermal runway in the secondary battery. The measurement unit determines whether a start-up signal is output based on the measurement value in a case where the battery control unit is in a sleep state, and outputs the start-up signal in a case where the start-up signal is output. The battery control unit starts by receiving the start-up signal from the measurement unit when the battery control unit is in the sleep state, executes arithmetic processing on the measurement value received from the measurement unit, and detects the sign of thermal runaway based on a calculated result of the arithmetic processing.