公开(公告)号：US11201614B2

公开(公告)日：2021-12-14

申请号：US16629603

申请日：2018-06-13

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Hikaru Miura ,  Akihiro Machida ,  Mutsumi Kikuchi ,  Tatsumi Yamauchi

IPC: H02H9/04 ,  H03K17/73 ,  H03K17/0814 ,  H02M7/537 ,  G01R31/3842 ,  H02M1/00

Abstract: Disconnection of a circulation path through which a circulation current flows is detected while suppressing an increase in circuit scale. A battery monitoring device includes switching circuits that control currents flowing through coils of main contactors by being controlled to be turned on and off, freewheeling diodes that are connected to the coils of the main contactors to form circulation paths for circulating the currents, and a control unit. The control unit measures output voltages of the freewheeling diodes at an input terminal, and detects the disconnection of the circulation paths based on the output voltages of the freewheeling diodes.

公开(公告)号：US09897662B2

公开(公告)日：2018-02-20

申请号：US14784141

申请日：2013-04-15

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Hikaru Miura ,  Mutsumi Kikuchi ,  Akihiko Kudoh ,  Tomonori Kanai

IPC: H02J1/10 ,  G01R31/36 ,  H01M10/48 ,  H02J7/00 ,  B60L3/12 ,  B60L11/18 ,  G01R15/22 ,  H01M10/42

CPC classification number: G01R31/3658 ,  B60L3/12 ,  B60L11/1853 ,  B60L2240/547 ,  B60L2240/549 ,  G01R15/22 ,  G01R31/3606 ,  G01R31/3689 ,  H01M10/482 ,  H01M2010/4278 ,  H01M2220/20 ,  H02J1/10 ,  H02J7/0021 ,  Y02T10/7005 ,  Y02T10/705

Abstract: A battery system includes a battery module having a plurality of assembled batteries. Battery monitoring circuits are provided to correspond to each of the assembled batteries of the battery module. A control circuit controls operation of the battery monitoring circuits. A first signal transmission path transmits signals that are input and output between the battery monitoring circuits and the control circuit. A first isolation element is connected to the control circuit, and a second isolation element is connected to the battery monitoring circuit. The first signal transmission path is isolated from the control circuit by the first isolation element and is isolated from the battery monitoring circuit by the second isolation element. The electrical potential of the first signal transmission path is a floating potential in relation to the electrical potentials of the control circuit and battery monitoring circuits.

公开(公告)号：US11862998B2

公开(公告)日：2024-01-02

申请号：US17253369

申请日：2019-05-20

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Tomonori Kanai ,  Hikaru Miura ,  Tomoyuki Arima

IPC: H02J7/00 ,  H01M10/48

CPC classification number: H02J7/0016 ,  H01M10/48 ,  H02J7/0071

Abstract: To improve reliability in balancing while suppressing power consumption during balancing. A battery management device 1 includes cell cons 41 and 42 that perform balancing for adjusting voltages of a plurality of battery cells 2 that are secondary batteries, and a control unit 3 that controls the cell cons 41 and 42. The cell con 41 includes the main timer 412 that measures the elapsed time for stopping the cell con 41, and the stop management unit 413 that stops the cell con 41 when the main timer 412 is abnormal. In the battery management device 1, the battery cell 2 that supplies power to the main timer 412 and the stop management unit 413, and the lead storage battery 7 that supplies power to the control unit 3 are power supplies different from each other.

公开(公告)号：US10132871B2

公开(公告)日：2018-11-20

申请号：US15874548

申请日：2018-01-18

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Hikaru Miura ,  Mutsumi Kikuchi ,  Akihiko Kudoh ,  Tomonori Kanai

IPC: H02J1/10 ,  G01R31/36 ,  G01R15/22 ,  B60L11/18 ,  B60L3/12 ,  H01M10/48 ,  H02J7/00 ,  H01M10/42

Abstract: A battery system includes a battery module having a plurality of assembled batteries. Battery monitoring circuits are provided to correspond to each of the assembled batteries of the battery module. A control circuit controls operation of the battery monitoring circuits. A first signal transmission path transmits signals that are input and output between the battery monitoring circuits and the control circuit. A first isolation element is connected to the control circuit, and a second isolation element is connected to the battery monitoring circuit. The first signal transmission path is isolated from the control circuit by the second isolation element. The electrical potential of the first signal transmission path is a floating potential in relation to the electrical potentials of the control circuit and battery monitoring circuits.

公开(公告)号：US11418042B2

公开(公告)日：2022-08-16

申请号：US16970009

申请日：2019-01-18

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Tatsumi Yamauchi ,  Hikaru Miura ,  Mutsumi Kikuchi ,  Akihiro Machida ,  Masahiro Ueda ,  Kenichiro Tsuru

IPC: H02J7/00 ,  B60L58/15 ,  B60L58/14

Abstract: A battery management unit capable of more reliably turning off a high-voltage relay. A battery management unit 1 includes a high-voltage relay 5 serving as a switch unit that turns on/off electrical connection between a high-voltage battery 102, which is a secondary battery, and an external device, and a power source IC 6 serving as a disconnection control unit having a first disconnection processing function of turning off the high-voltage relay 5 at the time of abnormality of the battery management unit 1 and a second disconnection processing function of detecting an abnormality of the first disconnection processing function and turning off the high-voltage relay 5.

公开(公告)号：US10788539B2

公开(公告)日：2020-09-29

申请号：US14784440

申请日：2013-04-26

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Hikaru Miura ,  Akihiko Kudoh ,  Mutsumi Kikuchi ,  Tomonori Kanai

IPC: G01R31/396 ,  G01R31/3835 ,  B60L3/00 ,  H02J7/00 ,  B60L58/20 ,  B60L58/10 ,  G01R19/00 ,  G01R31/36 ,  H01M10/42

Abstract: Provided are a battery monitoring device capable of suppressing a current flowing to individual battery cells and enhancing the safety thereof, even when there is a short circuit, for example, in a connection line connecting substrates having integrated circuits mounted thereon and a substrate having a microcomputer mounted thereon or a connection line connecting the substrates having the integrated circuits mounted thereon, and a battery system using the same. Resistors are provided in a positive electrode input line 13a connecting a positive electrode side of a battery pack group 200 and a total voltage detecting unit 13 and/or a negative electrode input line 13b connecting a negative electrode side of the battery pack group 200 and the total voltage detecting unit 13 and the resistors of the positive electrode input line 13a and/or negative electrode input line 13b are arranged on individual cell monitoring circuit boards 31 and 32.

公开(公告)号：US09825477B2

公开(公告)日：2017-11-21

申请号：US14436775

申请日：2012-10-19

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Hikaru Miura ,  Akihiko Kudo

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

CPC classification number: H02J7/0057 ,  H01M10/425 ,  H01M10/48 ,  H01M10/482 ,  H01M2010/4271 ,  H02J7/0016 ,  Y02T10/7055

Abstract: A battery monitoring device monitors a battery having a plurality of cell groups in which a plurality of cells is connected in series. The battery monitoring device comprises at one or more integrated circuit units, each of which corresponds to each cell group, that respectively measure the voltages of the cells of the cell group and performs cell balancing in order to adjust the capacities of the cells of the cell group; a control unit that controls the integrated circuit unit; and a power supply unit that supplies power to the control unit. The control unit causes the integrated circuit unit to start or to stop cell balancing, and sets a timer period for starting or stopping supply of the power.

公开(公告)号：US09755453B2

公开(公告)日：2017-09-05

申请号：US14758051

申请日：2013-01-25

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Tomonori Kanai ,  Akihiko Kudoh ,  Hikaru Miura ,  Mitsuo Noda ,  Mutsumi Kikuchi

IPC: H02J7/00 ,  H02J7/04 ,  H01M10/48 ,  H01M10/42

CPC classification number: H02J7/007 ,  H01M10/482 ,  H01M2010/4271 ,  H01M2220/20 ,  H02J7/0016 ,  H02J7/0021 ,  H02J7/0026 ,  Y02T10/7005 ,  Y02T10/7055 ,  Y02T10/7061 ,  Y02T90/16

Abstract: A cell controller in a battery-monitoring device that monitors an assembled battery having a single cell group or a plurality of cell groups, each made up with a plurality of battery cells connected in series, includes: a startup terminal to which a first discharge resistor is connected and a startup voltage is applied; and a cell-balancing unit that executes cell balancing operation in order to adjust charge levels of the plurality of battery cells during a time period through which the startup voltage remains equal to or greater than a predetermined voltage, wherein: the startup voltage is applied for a predetermined length of time by a first timer unit that includes a passive element capable of accumulating electric energy and capable of discharging electric energy to the startup terminal.