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公开(公告)号：US10449862B2
公开(公告)日：2019-10-22
申请号：US15555485
申请日：2016-03-04
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Tomonori Kanai , Akihiko Kudo , Tomoyuki Arima , Akiko Tsukamoto
IPC: B60L3/04 , G01R31/396 , B60L9/18 , G01R31/36 , G01R35/00 , G01R19/00 , G01R31/00 , H01M10/48 , H02J7/00 , B60L15/00 , B60L58/10 , G01R31/3835 , B60L50/51
Abstract: Cell voltage measurement is executed immediately after termination of diagnosis on a cell voltage detection function. In a battery managing device 10, a voltage detecting unit 140 detects a terminal voltage of each of battery cells 21 and 22. An RC filter 110 is electrically connected to voltage detecting lines L1, L2, and L3, and a status variation causing unit 130 causes an electrical status variation with respect to the voltage detecting lines L1, L2, and L3. A voltage fluctuating unit 120 fluctuates the terminal voltage of the battery cells 21 and 22 in response to the electrical status variation that is caused by the status variation causing unit 130. A microcomputer 150 diagnoses the voltage detecting unit 140 on the basis of a detection result of the terminal voltage of the battery cells 21 and 22 by the voltage detecting unit 140 when the terminal voltage of the battery cells 21 and 22 is fluctuated by the voltage fluctuating unit 120.
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公开(公告)号：US10014699B2
公开(公告)日：2018-07-03
申请号：US14913842
申请日：2014-08-06
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Hiroshi Iwasawa , Akihiko Kudo , Mitsuo Noda , Mutsumi Kikuchi , Tomonori Kanai
IPC: G01N27/416 , H02J7/00 , H01M10/48 , G01R31/36 , G01R19/25
CPC classification number: H02J7/0029 , G01R19/2509 , G01R31/3835 , G01R31/396 , H01M10/48 , H01M10/482 , H02J7/00 , H02J7/0026 , H02J7/0081 , H02J2007/0037
Abstract: Even with a large ripple voltage superposed on a voltage of a battery cell, the voltage of the battery cell can be measured accurately. In a battery monitoring device, a supply circuit, based on a reference voltage inputted from an assembled battery, generates a driving voltage for driving each of switching elements, of a selection circuit and supplies the driving voltage to the selection circuit. The reference voltage is inputted from the assembled battery to the supply circuit via a detecting filter circuit. As a result, a time constant of a route through which the reference voltage is inputted from the assembled battery to the supply circuit is approximately equal to time constants of detecting filter circuits.
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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
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.
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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
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.
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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
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.
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Patent Agency Ranking
公开(公告)号：US10386419B2
公开(公告)日：2019-08-20
申请号：US15555750
申请日：2016-03-04
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Tomonori Kanai , Akihiko Kudo , Tomoyuki Arima , Akiko Tsukamoto
IPC: G01N27/416 , G01R31/388 , G01R31/364 , G01R31/3828 , G01R31/3835 , G01R31/36 , G01R31/02
Abstract: Measurement of a cell voltage is executed immediately after diagnosis of a battery management device is ended. In a battery management device, current sources repeatedly perform an energization operation to cause a current to flow to voltage detection lines with a magnitude of the current that enables each amount of charge stored in capacitors changed by one energization operation to fall within a range corresponding to a fluctuation width of terminal voltages of battery cells during the energization operation when resistors are in a normal state. When the difference between the current terminal voltage of the battery cell and the past terminal voltage of the battery cell is larger than the predetermined threshold value, the microcomputer diagnoses that the resistor is in the open state.
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公开(公告)号：US10886578B2
公开(公告)日：2021-01-05
申请号：US15754199
申请日：2016-08-08
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Akihiko Kudo , Tomonori Kanai , Tomoyuki Arima
Abstract: Even when a service disconnect switch is opened, an integrated circuit connected to single battery cells are operated. The cell controller is provided with: the integrated circuits; a signal transmission path through which a signal is transmitted between the integrated circuits via the capacitors; and the connection circuit. The first integrated circuit is provided corresponding to the first cell group electrically connected to one side of the SD-SW, and the second integrated circuit is provided corresponding to the second cell group electrically connected to one side of the SD-SW. The connection circuit AC-couples the ground terminal GND of the first integrated circuit to the ground terminal GND of the second integrated circuit through the capacitor.
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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.
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公开(公告)号：US10393823B2
公开(公告)日：2019-08-27
申请号：US15548565
申请日：2016-02-03
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Akihiko Kudo , Tomonori Kanai , Tomoyuki Arima , Akiko Tsukamoto
IPC: G01R31/396 , G01R31/36 , G01R19/00 , H01M10/48 , H02J7/02
Abstract: An object is to achieve management control of an assembled battery using an accurate measured value of a cell voltage. A battery system monitoring apparatus 10 that monitors and controls a battery system includes battery monitoring circuits 100 provided for respective cell groups 120. Each of the battery monitoring circuits 100 includes a cell voltage measurement module 6 that is connected with two electrodes of respective single battery cells 110 of a corresponding cell group 120 via voltage detection lines 2 and that measures a cell voltage of each of the single battery cells 110 at each of predetermined timings. An RC filter 4 is connected with the voltage detection lines 2. The RC filter 4 includes resistors and capacitors. The cell voltage measurement module 6 extends intervals at which the cell voltage is to be measured when a stored charge amount in the capacitor in the RC filter 4 changes.
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公开(公告)号：US09880224B2
公开(公告)日：2018-01-30
申请号：US14784330
申请日：2013-04-19
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Akihiko Kudo , Mutsumi Kikuchi , Tomonori Kanai
CPC classification number: G01R31/3606 , B60L11/1851 , G01R31/362 , G01R31/3658
Abstract: A battery system monitoring device includes a plurality of battery monitoring circuits, which is respectively provided in cell groups, and a balancing resistor. Each of the battery monitoring circuits includes a cell voltage measurement unit to measure a cell voltage of each single battery cell at predetermined timing, a discharge switch to switch a state of a discharge current which flows from each single battery cell through the balancing resistor, and a balancing control unit configured to control the discharge switch. A filter circuit is connected between the cell voltage measurement unit and each single battery cell. The cell voltage measurement unit determines whether a cell voltage is measured within a transient response period corresponding to a time constant of the filter circuit and corrects a measurement value of a cell voltage by using a correction value correcting a result of the determination.
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