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    BATTERY STATE MEASUREMENT METHOD
    71.
    发明公开
    BATTERY STATE MEASUREMENT METHOD 审中-公开

    公开(公告)号：US20230314525A1

    公开(公告)日：2023-10-05

    申请号：US18115797

    申请日：2023-03-01

    申请人： HONDA MOTOR CO., LTD.

    发明人： Tadashi Kaga ,  Yuki Tominaga ,  Mao Hori ,  Naoya Aida

    IPC分类号： G01R31/392 ,  G01R31/396 ,  H01M10/48

    CPC分类号： G01R31/392 ,  G01R31/396 ,  H01M10/48

    摘要： A battery state measurement system includes a server device configured to analyze a state of a battery. The service device includes a communication unit configured to receive a plurality of pieces of characteristic data indicating characteristics associated with change of the battery state based on physical quantity data indicating a physical quantity associated with the battery state and a diagnosis unit configured to analyze a deterioration state of the battery on the basis of the plurality of pieces of characteristic data. The diagnosis unit analyzes the deterioration state of the battery through analysis of a dV/dQ curve indicating a rate of change of a voltage with respect to change of a reference capacity of the battery and repeatedly performs a process of calculating a negative-electrode value on the basis of an initial positive-electrode value in the dV/dQ curve and a cell value which is previous by one cycle and calculating a cell value on the basis of the initial positive-electrode value and the negative-electrode value.

    BATTERY MONITORING DEVICE
    74.
    发明公开
    BATTERY MONITORING DEVICE 审中-公开

    公开(公告)号：US20230288491A1

    公开(公告)日：2023-09-14

    申请号：US18320465

    申请日：2023-05-19

    申请人： DENSO CORPORATION

    发明人： KAZUTAKA HONDA ,  YUKIHIRO TOMONAGA ,  SHUNICHI KUBO

    IPC分类号： G01R31/396 ,  G01R31/3835 ,  H02J7/00

    CPC分类号： G01R31/396 ,  G01R31/3835 ,  H02J7/0047

    摘要： A battery monitoring device for monitoring an assembled battery having multiple battery cells includes: a range specifying unit that specifies a detection range; a voltage detection unit that detects a voltage of each battery cell in the detection range, includes an A/D converter for inputting a voltage corresponding to the voltage of each battery cell and a digital filter for inputting a digital signal output from the A/D converter and functioning as a low pass filter, and outputs an output signal of the digital filter as a detection signal representing a detection result of the voltage of each battery cell; and a characteristic setting unit that sets a characteristic of the digital filter.

    BATTERY UNIT
    76.
    发明公开
    BATTERY UNIT 审中-公开

    公开(公告)号：US20230266394A1

    公开(公告)日：2023-08-24

    申请号：US18065631

    申请日：2022-12-14

    申请人： HONDA MOTOR CO., LTD.

    发明人： Kazuki CHIBA ,  Toshiyuki ARIGA

    IPC分类号： G01R31/374 ,  G01R31/3835 ,  G01R31/367 ,  G01R31/396 ,  H01M10/48 ,  H01M10/44

    CPC分类号： G01R31/374 ,  G01R31/3835 ,  G01R31/367 ,  G01R31/396 ,  H01M10/482 ,  H01M10/441 ,  H01M10/486 ,  H02J7/0048

    摘要： A battery unit includes: a module including m cell groups that are connected in series and each include n cells connected in parallel; m voltage detectors; (m×(n−1)) heat flow detectors; a storage; and a state estimator. The storage stores a table map of OCV vs. SOC characteristics (A1) and a table map of HF vs. SOC characteristics (A2). For each of the m cell groups, the state estimator is configured to: determine, based on the (A2), a true SOC of (n−1) cells that corresponds to a heat flow detected; determine, based on the (A1), an OCV of the (n−1) cells that corresponds to the determined true SOC; calculates an OCV of a remaining cell from the determined OCV and a detected composite voltage; and determine, based on the (A1), a true SOC of the remaining cell that corresponds to the calculated OCV.

    Method and system for measurement of impedance of electrochemical devices
    77.
    发明授权
    Method and system for measurement of impedance of electrochemical devices 有权

    公开(公告)号：US11733190B2

    公开(公告)日：2023-08-22

    申请号：US17750517

    申请日：2022-05-23

    申请人： Alliance for Sustainable Energy, LLC

    发明人： Walter Ellis Klein, Jr.

    IPC分类号： G01N27/04 ,  G01R31/396

    CPC分类号： G01N27/045 ,  G01R31/396

    摘要： The present disclosure provides methods for determining impedance of an electrochemical device by electrically connecting a variable impedance in parallel with the electrochemical device; electrically connecting a power supply to the electrochemical device, the power supply generating a power supply current; modulating a current through the variable impedance; measuring a stack current flowing through the electrochemical device; measuring, at the electrochemical device, a voltage across at least a portion of the electrochemical device; and calculating, based on the measured stack current and the measured voltage, the impedance of the electrochemical device. Systems for performing such methods are also provided.

    Energy storage system and insulation detection method therefor
    78.
    发明授权
    Energy storage system and insulation detection method therefor 有权

    公开(公告)号：US11726133B2

    公开(公告)日：2023-08-15

    申请号：US17434746

    申请日：2020-02-27

    申请人： Contemporary Amperex Technology Co., Limited

    发明人： Chaoyang Liu ,  Jinfeng Gao

    IPC分类号： G01R31/00 ,  G01R31/14 ,  G01R31/396

    CPC分类号： G01R31/14 ,  G01R31/396

    摘要： An insulation detection method includes closing a main positive relay and a main negative relay in a high voltage safety box of each electric cabinet in an energy storage system; controlling an insulation detection board to perform insulation detection at a main power management system, and to report an insulation detection result to a power conversion system; controlling, if the insulation detection result at the main power management system indicates no fault and no instruction of starting insulation detection at the power conversion system is received, the insulation detection board to continue performing the insulation detection; and instructing, if the insulation detection result at the main power management system indicates an insulation fault, a battery management system of each electric cabinet to control the main positive relay and the main negative relay in the high voltage safety box to turn off.