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：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.

公开(公告)号：US20230324471A1

公开(公告)日：2023-10-12

申请号：US18335123

申请日：2023-06-14

Applicant: DENSO CORPORATION

Inventor： Hisashi UMEMOTO ,  Yuji YAMAGAMI ,  Shuhei YOSHIDA ,  Masaki UCHIYAMA

IPC: G01R31/392 ,  H01M10/44 ,  H01M10/48 ,  G01R31/389

CPC classification number: G01R31/392 ,  H01M10/44 ,  H01M10/48 ,  G01R31/389 ,  H01M2220/20

Abstract: A control device includes a diagnosis unit configured to diagnose a deterioration state of a secondary battery. The diagnosis unit includes: a resistance calculator configured to calculate a direct current resistance and a reaction resistance of impedance components based on an impedance measurement result of the secondary battery; an index value calculator configured to calculate an index value related to the direct current resistance and the reaction resistance; and a deterioration determination unit configured to compare the index value with a determination threshold based on an impedance characteristic at the time of normal deterioration of the secondary battery so as to determine whether a specific deterioration occurs due to charge and discharge of the secondary battery.

公开(公告)号：US20250058675A1

公开(公告)日：2025-02-20

申请号：US18938850

申请日：2024-11-06

Applicant: DENSO CORPORATION

Inventor： Tatsuhiro NUMATA ,  Masaki UCHIYAMA ,  Taisuke KURACHI ,  Tetsuya WATANABE

IPC: B60L58/18 ,  B60L50/64 ,  B60L53/80 ,  B60L58/12

Abstract: A battery unit configured to be exchangeable with respect to an external load, in which the battery unit includes: a battery member capable of supplying power to the external load in a state where the battery unit is connected to the external load; a battery load connected to the battery member, a measurement unit that measures at least either a current flowing through the battery load or a voltage applied to the battery load; and a control unit configured to operate with the battery member as a power source in a state where the battery unit is removed from the external load, cause a current to flow to the battery load from the battery member at a predetermined timing and acquire a measurement result measured by the measurement unit at a time when the current is caused to flow.

公开(公告)号：US20230068288A1

公开(公告)日：2023-03-02

申请号：US17896261

申请日：2022-08-26

Applicant: DENSO CORPORATION

Inventor： Takuma NAKAGAWA ,  Shogo SHIGEMORI ,  Tatsuhiro NUMATA ,  Tetsuya WATANABE ,  Masaki UCHIYAMA ,  Taisuke KURACHI

IPC: G01R31/371 ,  H02J7/00 ,  G01R31/3842 ,  G01R31/392 ,  G01R31/396

Abstract: A battery management system includes a monitoring device and a controller. The monitoring device is arranged in a housing accommodating a battery. The monitoring device monitors the battery and acquires battery monitoring information that includes information indicating a state of the battery. The controller performs wireless communication with the monitoring device and executes a predetermined process based on the battery monitoring information. The monitoring device holds imperfect information that is battery monitoring information indicating failure of data transmission/reception between the monitoring device and the controller. The monitoring device retransmits information corresponding to the imperfect information from next time the battery monitoring information is transmitted.

公开(公告)号：US20220373602A1

公开(公告)日：2022-11-24

申请号：US17869193

申请日：2022-07-20

Applicant: DENSO CORPORATION

Inventor： Masaaki KITAGAWA ,  Kazuo MATSUKAWA ,  Yuji YAMAGAMI ,  Masaki UCHIYAMA

IPC: G01R31/36 ,  G01R31/389 ,  H01M10/48 ,  H01M50/569 ,  H01M10/42 ,  H01M50/317 ,  H01M50/103 ,  H01M50/55 ,  H01M50/557 ,  H01M50/107 ,  H01M50/559 ,  H01M50/548

Abstract: In a battery measurement apparatus, a signal control unit, provided on a first electrical path connecting electrodes of a storage battery, causes the storage battery to output a predetermined alternating-current signal or inputs a predetermined alternating-current signal to the storage battery. A response signal input unit, provided on a second electrical path connecting the electrodes, inputs a response signal of the storage battery in response to the alternating-current signal through the second electrical path. Based on the response signal, a calculating unit calculates information related to a complex impedance of the storage battery. A magnetic flux passage area, surrounded by the storage battery and the second electrical path, is formed. A size of the magnetic flux passage area is set such that an error between an actual complex impedance of the storage battery and a complex impedance calculated by the calculating unit is within a range of ±1 mΩ.

公开(公告)号：US20250042225A1

公开(公告)日：2025-02-06

申请号：US18924377

申请日：2024-10-23

Applicant: DENSO CORPORATION

Inventor： Yuki SUGIYAMA ,  Takahiro MAEDA ,  Atsushi YAMADA ,  Satoshi SUZUKI ,  Masayuki TAKEUCHI ,  Masaki UCHIYAMA

IPC: B60H1/32

Abstract: A compressor module includes: an evaporator configured to evaporate a refrigerant of a vapor compression refrigeration cycle; a liquid storage configured to store the refrigerant in a liquid phase; a compressor configured to suction and compress the refrigerant; and a flow passage forming member to which the evaporator, the liquid storage and the compressor are installed. The flow passage forming member forms at least a portion of a flow passage of the refrigerant. The compressor is positioned on a lower side of the flow passage forming member, and the flow passage of the refrigerant includes a suction-side refrigerant flow passage, through which the refrigerant in a gas-phase to be suctioned into the compressor flows. The suction-side refrigerant flow passage has a rising portion that rises upward as the rising portion approaches the compressor.

公开(公告)号：US20240159835A1

公开(公告)日：2024-05-16

申请号：US18423449

申请日：2024-01-26

Applicant: DENSO CORPORATION

Inventor： Masaki UCHIYAMA ,  Shunichi Kubo ,  Taisuke Kurachi ,  Yuuki Hori

IPC: G01R31/3835 ,  G01R31/378 ,  G01R31/396 ,  H01M4/58 ,  H01M4/583 ,  H01M10/42 ,  H02J7/00

CPC classification number: G01R31/3835 ,  G01R31/396 ,  H01M10/4285 ,  H02J7/0048 ,  G01R31/378 ,  H01M4/5825 ,  H01M4/583

Abstract: A battery monitoring device is applied to an assembled battery having a plurality of battery cells connected in series, the battery cells including a first battery cell and a second battery cell. The battery monitoring device includes: an acquisition unit configured to acquire, during charging or discharging of the battery cells, a battery parameter of each of the first and second battery cells, the battery parameter of each of the first and second battery cells being a terminal voltage across the corresponding one of the first and second battery cells or an impedance of the corresponding one of the first and second battery cells; and a state calculation unit configured to calculate a difference between the acquired battery parameter of the first battery cell and the acquired battery parameter of the second battery cell, and calculate a battery state of the battery cells based on the calculated difference.

公开(公告)号：US20240030723A1

公开(公告)日：2024-01-25

申请号：US18375739

申请日：2023-10-02

Applicant: DENSO CORPORATION

Inventor： Taisuke KURACHI ,  Masaki UCHIYAMA

IPC: H02J7/00

CPC classification number: H02J7/0016 ,  H02J7/005 ,  H02J7/007182 ,  H02J7/007194

Abstract: An equalization device performs equalization of amounts of charge of cell batteries in a battery pack. The device includes a state determination unit that determines whether it is in a predetermined charging state that includes at least one of a state in which the battery pack is subjected to constant current charge and a state in which the battery pack is subjected to constant power charge and does not include a state in which the battery pack is subjected to constant voltage charge, a charging time variation determination unit that determines whether a variation voltage indicating variation of a voltage of each of the cell batteries is higher than a predetermined charging time determination voltage, and a charging time equalization unit that performs the equalization if it is determined that it is in the predetermined charging state and that the variation voltage is higher than the charging time determination voltage.

公开(公告)号：US20220194167A1

公开(公告)日：2022-06-23

申请号：US17691270

申请日：2022-03-10

Applicant: DENSO CORPORATION

Inventor： Masakazu MORIMOTO ,  Yasuhiro MIZUNO ,  Masaki UCHIYAMA ,  Yuki SUGIYAMA

IPC: B60H1/00

Abstract: A plurality of components of a refrigeration cycle are connected to a connection module. The connection module includes a body having a refrigerant flow path that constitutes a part of a refrigerant flow path in the refrigeration cycle. The refrigerant flow path includes a high-temperature-side flow path and a low-temperature-side flow path. The high-temperature-side flow path has a connection port to which a high-temperature-side component of the plurality of components, through which a high-pressure refrigerant of the refrigeration cycle flows, is connectable. The low-temperature-side flow path has a connection port to which a low-temperature-side component of the plurality of components, through which a refrigerant having a lower temperature than the high-pressure refrigerant flows, is connectable.