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：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：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.

公开(公告)号：US20240133967A1

公开(公告)日：2024-04-25

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.

公开(公告)号：US20190181658A1

公开(公告)日：2019-06-13

申请号：US16215388

申请日：2018-12-10

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Masahiko ITO ,  Masakazu KOUDA ,  Isao ISHIBE

IPC: H02J7/00 ,  G01R31/396 ,  G01R31/3835

Abstract: A battery control unit is adapted for a power supply system provided with a storage battery series-connected battery cells, a filter circuit, a discharge circuit, and a connection member connecting between the battery cell and the filter circuit.The battery control unit includes a voltage detection unit detecting voltage at the battery cell where noise is eliminated by the filter circuit, the voltage being detected immediately before/after a discharging is performed through the discharge circuit; a correction value calculation unit that calculates an amount of a voltage drop at the connection member when a discharging is performed through the discharge circuit, to be a correction value; and a voltage calculation unit that calculates voltage of the battery cell by adding the correction value calculated by the correction value calculation unit to a post-discharge voltage detected immediately after the discharging by the voltage detection unit.

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：US20210208201A1

公开(公告)日：2021-07-08

申请号：US17207249

申请日：2021-03-19

Applicant: DENSO CORPORATION

Inventor： Isao ISHIBE ,  Syunya YAMAMOTO

IPC: G01R31/3835 ,  H02J7/00 ,  G01R31/396 ,  H01M10/48

Abstract: In a battery monitoring device, a plurality of short-circuit switches are correspondingly provided for a plurality of battery cells of an assembled battery through detection lines. The battery cells includes a first battery cell and a second battery cell adjacent to each other. The short-circuit switches includes a first switch and a second switch, respectively, corresponding to the first battery cell and the second battery cell. An abnormality determination circuit executes an on and off control to turn the second switch from an off state to an on state, and then to the off state again while keeping the first switch in an off state. The abnormality determination circuit determines an abnormality of a detection line based on detection voltages of the first battery cell and detection voltages of the second battery cell before and after execution of the on and off control.