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    Fuel cell system
    3.
    发明授权
    Fuel cell system 有权

    公开(公告)号：US10164275B2

    公开(公告)日：2018-12-25

    申请号：US15124763

    申请日：2014-03-13

    Applicant: NISSAN MOTOR CO., LTD.

    Inventor： Tetsuya Aoki ,  Takahiro Kaito ,  Takahiro Fujii

    IPC: H01M8/04746 ,  H01M8/04828 ,  H01M8/04089 ,  H01M8/0438 ,  H01M8/04492 ,  H01M8/04537 ,  H01M8/04223 ,  H01M8/1018

    Abstract: A fuel cell system includes: a wetness target value calculating unit configured to calculate a target value of a wet state of the fuel cell; a gas required flow rate calculating unit configured to calculate a cathode gas required flow rate on the basis of a power generation request to the fuel cell; a wetness-control anode gas flow rate calculating unit configured to calculate a wetness-control anode gas circulation flow rate at least on the basis of the wetness target value and the cathode gas required flow rate during a dry control; an anode gas flow rate control unit configured to control an anode gas circulation flow rate on the basis of the wetness-control anode gas circulation flow rate; a wetness-control cathode gas flow rate calculating unit configured to calculate a wetness-control cathode gas flow rate at least on the basis of the wetness target value and a measured value or estimated value of the anode gas circulation flow rate during the dry control; and a cathode gas flow rate control unit configured to control a cathode gas flow rate on the basis of the cathode gas required flow rate and the wetness-control cathode gas flow rate.

    Impedance measuring device and control method for impedance measuring device
    6.
    发明授权
    Impedance measuring device and control method for impedance measuring device 有权

    公开(公告)号：US09817075B2

    公开(公告)日：2017-11-14

    申请号：US15119056

    申请日：2014-02-19

    Applicant: NISSAN MOTOR CO., LTD.

    Inventor： Masanobu Sakai ,  Tetsuya Aoki ,  Hidetaka Nishimura ,  Masashi Sato ,  Michihiko Matsumoto

    IPC: G01R31/36

    CPC classification number: G01R31/3662 ,  G01R31/3651 ,  G01R31/3658

    Abstract: An impedance measuring device outputs an alternating current of a prescribed frequency to a positive electrode terminal and a negative electrode terminal of the laminated type battery. The impedance measuring device detects an alternating-current potential difference between the positive electrode terminal and an intermediate-point terminal, and an alternating-current potential difference between the negative electrode terminal and the intermediate-point terminal. The impedance measuring device adjusts an amplitude of the alternating current such that the alternating-current potential difference between the positive electrode terminal and the intermediate-point terminal, and the alternating-current potential difference between the negative electrode terminal and the intermediate-point terminal coincide. The impedance measuring device computes an impedance of the laminated type battery on the basis of the alternating current adjusted and the alternating-current potential difference. On the a phase difference between an alternating-current potential generated at the positive electrode terminal and an alternating-current potential generated at the negative electrode terminal, or a parameter related to the phase difference, the impedance measuring device performs any one process of: a diagnosis process for diagnosing whether or not a measurement state is defective; a cancellation process for discarding a measurement result; and a hold process for fixing the measurement result at a prescribed value.

    State estimation device and method for fuel cell and fuel cell system
    8.
    发明授权
    State estimation device and method for fuel cell and fuel cell system 有权

    公开(公告)号：US11054473B2

    公开(公告)日：2021-07-06

    申请号：US15518317

    申请日：2014-10-30

    Applicant: NISSAN MOTOR CO., LTD.

    Inventor： Tetsuya Aoki

    IPC: G01R31/36 ,  G01R31/389 ,  G01N27/02 ,  H01M8/04664 ,  H01M8/04537 ,  H01M8/1018

    Abstract: A state estimation device for a fuel cell for generating power upon receiving the supply of anode gas and cathode gas, comprising: an internal impedance measurement unit configured to measure an internal impedance of the fuel cell on the basis of an alternating-current signal of a predetermined frequency output from the fuel cell; a state quantity preliminary estimation value calculation unit configured to calculate a first preliminary estimation value for a state quantity of an electrode obtained from a real component of a measurement value of the internal impedance and a second preliminary estimation value for the state quantity of the electrode obtained from an imaginary component of the measurement value of the internal impedance; and a state quantity final estimation value determination unit configured to determine a final estimation value of the state quantity of the electrode on the basis of the calculated first and second preliminary estimation values.

    Battery Control System and Battery Control Method
    10.
    发明申请
    Battery Control System and Battery Control Method 有权

    公开(公告)号：US20250038548A1

    公开(公告)日：2025-01-30

    申请号：US18716848

    申请日：2022-10-17

    Applicant: Nissan Motor Co., Ltd.

    Inventor： Tetsuya Aoki ,  Toshikazu Kotaka

    IPC: H02J7/00 ,  H01M10/44

    Abstract: A battery control system includes a discharge mechanism and a controller. The discharge mechanism performs balancing of residual discharge capacities among secondary batteries by discharging a battery having a residual discharge capacity greater than a residual discharge capacity of another battery in a battery group that includes a plurality of the batteries whose open circuit voltage at charge is greater than open circuit voltage at discharge. The controller executes pre-discharge that discharges the battery by at least the amount of power that causes the open circuit voltage to switch from the open circuit voltage at charge to the open circuit voltage at discharge prior to the balancing. The discharge mechanism performs the balancing based on a voltage of the battery after the pre-discharge is executed by the controller.

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