公开(公告)号：US11901525B2

公开(公告)日：2024-02-13

申请号：US17844946

申请日：2022-06-21

Applicant: DENSO CORPORATION

Inventor： Tatsuhiro Numata ,  Shunichi Kubo

IPC: H01M10/48 ,  G01R31/36 ,  H01M10/42

CPC classification number: H01M10/482 ,  G01R31/3648 ,  H01M2010/4271 ,  H01M2010/4278

Abstract: In a battery monitoring system including a plurality of battery modules each including one or more cells, the battery modules are connected in series to each other. The battery monitoring system monitors the state of each cell based on the voltage value of the cell and the current value of the battery modules. A current detection unit detects the current value. Each voltage detection unit is associated with the corresponding one of the battery modules and detects the voltage value. Each slave unit is associated with the corresponding one of the battery modules, and wirelessly transmits information including synchronous current and voltage values detected by the current detection unit and the voltage detection unit. A master unit receives the information transmitted from the slave units. A central monitoring unit receives the information received by the master unit.

公开(公告)号：US12255297B2

公开(公告)日：2025-03-18

申请号：US18413965

申请日：2024-01-16

Applicant: DENSO CORPORATION

Inventor： Tatsuhiro Numata ,  Shunichi Kubo

IPC: H01M10/48 ,  G01R31/36 ,  H01M10/42

Abstract: In a battery monitoring system including a plurality of battery modules each including one or more cells, the battery modules are connected in series to each other. The battery monitoring system monitors the state of each cell based on the voltage value of the cell and the current value of the battery modules. A current detection unit detects the current value. Each voltage detection unit is associated with the corresponding one of the battery modules and detects the voltage value. Each slave unit is associated with the corresponding one of the battery modules, and wirelessly transmits information including synchronous current and voltage values detected by the current detection unit and the voltage detection unit. A master unit receives the information transmitted from the slave units. A central monitoring unit receives the information received by the master unit.

公开(公告)号：US20240154195A1

公开(公告)日：2024-05-09

申请号：US18413965

申请日：2024-01-16

Applicant: DENSO CORPORATION

Inventor： Tatsuhiro Numata ,  Shunichi Kubo

IPC: H01M10/48 ,  G01R31/36

CPC classification number: H01M10/482 ,  G01R31/3648 ,  H01M2010/4278

Abstract: In a battery monitoring system including a plurality of battery modules each including one or more cells, the battery modules are connected in series to each other. The battery monitoring system monitors the state of each cell based on the voltage value of the cell and the current value of the battery modules. A current detection unit detects the current value. Each voltage detection unit is associated with the corresponding one of the battery modules and detects the voltage value. Each slave unit is associated with the corresponding one of the battery modules, and wirelessly transmits information including synchronous current and voltage values detected by the current detection unit and the voltage detection unit. A master unit receives the information transmitted from the slave units. A central monitoring unit receives the information received by the master unit.

公开(公告)号：US12294290B2

公开(公告)日：2025-05-06

申请号：US18372307

申请日：2023-09-25

Applicant: DENSO CORPORATION

Inventor： Ryoya Kazaoka ,  Yusuke Shindo ,  Shunichi Kubo ,  Ken Toshiyuki

IPC: H02M1/14 ,  B60L15/00 ,  B60L58/16 ,  H02J7/00 ,  H02M7/5395 ,  H02P21/22 ,  H02P27/08

Abstract: A power converter has a capacitor and a power conversion unit having a series-connected unit composed of an upper arm side switching element and a lower arm side switching element. The capacitor is connected in parallel with the serios connection unit. The power conversion unit supplies electric power to a motor. A controller for the power conversion unit has a frequency characteristics estimation part estimating frequency characteristics of a battery current of the battery when a current is flowing between the power convertor and the battery, a ripple current setting part determining a ripple frequency of a ripple current contained in the battery current based on the frequency characteristics of the battery current, and a control part performing a switching control of the switching elements based on the ripple frequency in order to generate the ripple current.

公开(公告)号：US11830989B2

公开(公告)日：2023-11-28

申请号：US17863696

申请日：2022-07-13

Applicant: DENSO CORPORATION

Inventor： Naoto Yamashita ,  Masakazu Kouda ,  Fumihiko Hori ,  Shunichi Kubo

IPC: H01M10/48 ,  H01M10/42 ,  H02J7/00

CPC classification number: H01M10/482 ,  H01M10/425 ,  H01M2010/4278 ,  H01M2220/20 ,  H02J7/00302 ,  H02J7/00306

Abstract: In a battery system including an assembled battery having a plurality of battery cells connected in series, each of a plurality of monitoring units includes a voltage classification unit configured to classify a terminal voltage between each pair of input terminals in the monitoring unit as a cell voltage or as a zero voltage that is a terminal voltage of substantially zero. The input terminals in each of all or all but one of the monitoring units include at least one specific terminal pair for acquiring the zero voltage at a different position and/or include a different number of specific terminal pairs for acquiring the zero voltage. Each of the plurality of monitoring units further includes an identifier generation unit configured to generate an identifier based on at least one of the position of the at least one specific terminal pair and the number of specific terminal pairs.

公开(公告)号：US11506718B2

公开(公告)日：2022-11-22

申请号：US16523788

申请日：2019-07-26

Applicant: DENSO CORPORATION

Inventor： Masahiko Ito ,  Shunichi Kubo ,  Hayato Mizoguchi

IPC: G01R31/364 ,  G01R1/20 ,  G01R31/396 ,  G01R31/3835 ,  H01M10/48

Abstract: A connection part which connects a terminal part and a processing part include an equalization resistor that is inserted into each main line and a 0-Ω resistor that is a short circuit line for short circuiting a main line of a first terminal and a main line of a second terminal. In the terminal part, the second terminal s unused, and a battery cell adjacent to a high-potential side of a stack bar is connected between the first terminal and a third terminal.

公开(公告)号：US12119683B2

公开(公告)日：2024-10-15

申请号：US17502315

申请日：2021-10-15

Applicant: DENSO CORPORATION

Inventor： Shogo Shigemori ,  Shunichi Kubo ,  Takeshi Iida ,  Yukihiro Tomonaga ,  Taisuke Kurachi ,  Shozo Suzuki ,  Shinya Kato

IPC: H02J7/00 ,  B60L58/10 ,  B60L58/12 ,  B60L58/22 ,  G01R31/382 ,  G01R31/3842 ,  G01R31/392 ,  G01R31/396 ,  H01M10/42 ,  H01M10/48

CPC classification number: H02J7/0014 ,  B60L58/10 ,  B60L58/12 ,  B60L58/22 ,  G01R31/382 ,  G01R31/3842 ,  G01R31/392 ,  G01R31/396 ,  H01M10/425 ,  H01M10/482 ,  H02J7/0069 ,  H01M2010/4271 ,  H02J7/0019

Abstract: A battery management device is configured to set a limited measurement range that limits a range for measuring a voltage of each of a plurality of batteries for a vehicle. The battery management device is configured to measure the voltage of each of the plurality of batteries within the limited measurement range.

公开(公告)号：US20240088694A1

公开(公告)日：2024-03-14

申请号：US18517149

申请日：2023-11-22

Applicant: DENSO CORPORATION

Inventor： Kazuhiro SHIRAKAWA ,  Keiya Tani ,  Shunichi Kubo

IPC: H02J7/00 ,  H02J7/06

CPC classification number: H02J7/00711 ,  H02J7/00714 ,  H02J7/06 ,  H02J2207/20

Abstract: An electrical charging apparatus working to electrically charge an electrical storage device includes an electrical power converter and a controller. The electrical power converter converts an alternating-current input voltage into a direct-current voltage and outputs it to the electrical storage device. The controller works to control the electrical power converter to pulsate the charging current supplied from the electrical power converter to the electrical storage device. The controller also controls the electrical power converter to set a pulsation frequency of the charging current to an integral multiple of the frequency of the input voltage and also to bring a phase difference between a zero-crossing time of the input voltage and a time when the charging current is minimized to be smaller than or equal to one-eighth of one cycle of the input voltage.

公开(公告)号：US11417918B2

公开(公告)日：2022-08-16

申请号：US16576968

申请日：2019-09-20

Applicant: DENSO CORPORATION

Inventor： Tatsuhiro Numata ,  Shunichi Kubo

IPC: H01M10/48 ,  G01R31/36 ,  H01M10/42

Abstract: In a battery monitoring system including a plurality of battery modules each including one or more cells, the battery modules are connected in series to each other. The battery monitoring system monitors the state of each cell based on the voltage value of the cell and the current value of the battery modules. A current detection unit detects the current value. Each voltage detection unit is associated with the corresponding one of the battery modules and detects the voltage value. Each slave unit is associated with the corresponding one of the battery modules, and wirelessly transmits information including synchronous current and voltage values detected by the current detection unit and the voltage detection unit. A master unit receives the information transmitted from the slave units. A central monitoring unit receives the information received by the master unit.

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.