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：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：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：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.