公开(公告)号：US20240168100A1

公开(公告)日：2024-05-23

申请号：US18528868

申请日：2023-12-05

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Isao ISHIBE

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

CPC classification number: G01R31/389 ,  G01R31/3648 ,  G01R31/374 ,  G01R31/3842

Abstract: In a battery measurement apparatus, a storage battery is caused to supply an alternating-current signal or receive an alternating-current signal to the storage battery. The alternating-current signal flowing through a first electrical path via a second electrical path is measured. In response to the alternating-current signal, a response signal of the storage battery received. Information related to a complex impedance of the storage battery is calculated based on the alternating-current signal and the response signal. A magnetic flux passage area is defined as an area surrounded by the second electrical path and through which a magnetic flux based on the alternating-current signal flowing through the first electrical path passes. A size of the magnetic flux passage area is set such that an error in the complex impedance due to induced electromotive force based on the alternating-current signal flowing through the first electrical path is within a range of ±1 mΩ.

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：US20240133966A1

公开(公告)日：2024-04-25

申请号：US18400509

申请日：2023-12-29

Applicant: DENSO CORPORATION

Inventor： Fukuo KITAGAWA ,  Motomasa IIZUKA ,  Hisayoshi OTA ,  Masaaki KITAGAWA

IPC: G01R31/389 ,  H01M10/0587 ,  H01M10/48 ,  H01M50/569

CPC classification number: G01R31/389 ,  H01M10/0587 ,  H01M10/48 ,  H01M50/569

Abstract: A battery measurement system includes: a battery including terminals and a housing case, and a battery measurement device. The battery measurement device includes: a signal control unit provided on a first electrical path connecting positive and negative electrode external terminals and configured to receive or apply an AC signal, a response signal input unit provided on a second electrical path connecting positive and negative electrodes of an electrode body and configured to receive a response signal to the AC signal, and a calculation unit configured to calculate complex impedance information based on the response signal. The second electrical path is wired from the response signal input unit toward the inside of the housing case so that a magnetic flux passage area surrounded by the electrode body and the second electrical path is smaller in magnitude than an area surrounded by the electrode body, the terminals and the housing case.

公开(公告)号：US20240109421A1

公开(公告)日：2024-04-04

申请号：US18541871

申请日：2023-12-15

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Isao ISHIBE

IPC: B60L3/00 ,  B60L58/12 ,  B60L58/16 ,  B60L58/18 ,  G01R31/387 ,  G01R31/389 ,  G01R31/392 ,  G01R31/396

CPC classification number: B60L3/0046 ,  B60L58/12 ,  B60L58/16 ,  B60L58/18 ,  G01R31/387 ,  G01R31/389 ,  G01R31/392 ,  G01R31/396

Abstract: A battery measurement apparatus connected to a battery module in which a plurality of storage batteries are combined, includes: a measurement unit that measures a battery state of at least each of the storage batteries; and a determination unit that determines whether replacement of any one of the storage batteries has occurred based on the battery state. The determination unit determines that replacement of a storage battery has occurred in the case where a parameter indicating the battery state of any one of the storage batteries that constitute the battery module is determined to be out of a predetermined range and a parameter indicating the battery state of other storage batteries or other battery modules are also determined to be out of a predetermined range.

公开(公告)号：US20240027534A1

公开(公告)日：2024-01-25

申请号：US18375618

申请日：2023-10-02

Applicant: DENSO CORPORATION

Inventor： Tetsuya HORI ,  Masaaki KITAGAWA

IPC: G01R31/389 ,  G01R31/382

CPC classification number: G01R31/389 ,  G01R31/382 ,  G01R31/392

Abstract: An impedance calculation apparatus applicable to a power source system provided with a storage battery, applying an AC signal to the storage battery to calculate an impedance of the storage battery, during a predetermined impedance calculation period, the impedance calculation apparatus includes: an error calculation unit that applies the AC signal having a specified frequency at which at least either a real part component or an imaginary part component of an impedance of the storage battery is a specific value, to calculate an impedance error of the storage battery, during an error calculation period different from the impedance calculation period; an impedance calculation unit that calculates an impedance of the storage battery during the impedance calculation period; and a correction unit that corrects, based on the impedance error, the impedance of the storage battery calculated by the impedance calculation unit.

公开(公告)号：US20240133960A1

公开(公告)日：2024-04-25

申请号：US18399074

申请日：2023-12-28

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Shun Miyauchi ,  Isao Ishibe

IPC: G01R31/3835 ,  H01M10/42 ,  H02J7/00

CPC classification number: G01R31/3835 ,  H01M10/4285 ,  H02J7/0047

Abstract: In a battery measurement apparatus, a current controller sets a predetermined wavenumber of each of first and second alternating signals, and determines whether an input or an output of the predetermined wavenumber of one of the first and second alternating signals to or from a rechargeable battery has completed. The current controller switches, in response to determination that the input or output of the predetermined wavenumber of one of the first and second alternating signals to or from the rechargeable battery has completed, the completed one of the first and second alternating signals to a new alternating signal having another frequency while continuing the input or output of the other of the first and second alternating signals to or from the rechargeable battery.

公开(公告)号：US20240125863A1

公开(公告)日：2024-04-18

申请号：US18397239

申请日：2023-12-27

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Isao ISHIBE

IPC: G01R31/389 ,  G01R31/3842

CPC classification number: G01R31/389 ,  G01R31/3842

Abstract: A battery measurement device for measuring a state of a rechargeable battery, includes a signal control unit provided on a first electrical path connecting a positive electrode and a negative electrode of the rechargeable battery and configured to cause the rechargeable battery to output a predefined AC signal or to input a predefined AC signal to the rechargeable battery, a voltage measurement unit provided on a second electrical path connecting the positive electrode and the negative electrode of the rechargeable battery and configured to receive, via the second electrical path, voltage variations of the rechargeable battery in response to the AC signal, a calculation unit configured to calculate information on a complex impedance based on the voltage variations, and a determination unit configured to determine an abnormality and a precursory sign of an abnormality in the second electrical path based on the information on the complex impedance.

公开(公告)号：US20210028637A1

公开(公告)日：2021-01-28

申请号：US16937424

申请日：2020-07-23

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Shun MIYAUCHI ,  Takumi SHIMIZU

IPC: H02J7/00 ,  G01R31/389 ,  G01R31/364 ,  G01R31/396 ,  H01M10/44 ,  H01M10/48

Abstract: A battery monitoring apparatus includes a circuit board, a signal control unit configured to cause a predetermined AC signal to be outputted from a storage battery through a first electrical path, a response signal input unit configured to input, through a pair of second electrical paths, a response signal of the storage battery to the AC signal, and a calculating unit configured to calculate, based on the response signal, a complex impedance of the storage battery. The first and second electrical paths are provided on a major face of the circuit board. On the circuit board, there is defined a first region which is surrounded by the first and second electrical paths and two terminals of the storage battery. The size of the first region is set to have an electromotive force, which is induced in the second electrical paths by the AC signal, be within an allowable electromotive-force range.

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：US20240230777A9

公开(公告)日：2024-07-11

申请号：US18402069

申请日：2024-01-02

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Isao ISHIBE

IPC: G01R31/389 ,  G01R31/374 ,  G01R31/3828 ,  H01M10/48

CPC classification number: G01R31/389 ,  G01R31/374 ,  G01R31/3828 ,  H01M10/48

Abstract: A battery measurement device that measures a state of a secondary battery includes: a signal control section that causes an alternating-current signal to be outputted from the secondary battery or inputs an alternating-current signal to the secondary battery; a current measurement section that measures the alternating-current signal; a response signal measurement section that measures a response signal of the secondary battery responsive to the alternating-current signal; and a calculation section that calculates information regarding a complex impedance of the secondary battery based on measurement results of the alternating-current signal measured by the current measurement section and the response signal measured by the response signal measurement section. The arithmetic section calculates the information regarding the complex impedance after waiting for the measurement result of the alternating-current signal to reach a steady state after start of the input/output of the alternating-current signal by the signal control section and outputs a calculation result.