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    MANAGEMENT DEVICE AND POWER SUPPLY SYSTEM
    1.
    发明申请
    MANAGEMENT DEVICE AND POWER SUPPLY SYSTEM 有权

    公开(公告)号：US20210318386A1

    公开(公告)日：2021-10-14

    申请号：US17261101

    申请日：2019-06-12

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： YUSUKE ITAKURA ,  CHANGHUI YANG ,  SHINYA NISHIKAWA ,  TOHRU WATANABE

    IPC: G01R31/388 ,  G01R31/392 ,  B60L58/20

    Abstract: Provided is a controller configured: to calculate, among voltages detected from a plurality of cells, a voltage difference between the voltage detected from one cell of the plurality of cells, the one cell to be detected, and a representative voltage at each of a first time and a second time, the representative voltage based on the voltage detected from at least one cell of the plurality of cells, the at least one cell to be compared; and when a discrepancy between the voltage difference at the first time and the voltage difference at the second time is equal to or more than a threshold, to determine that an abnormality has occurred in the one cell to be detected. The controller refers to a state-of-charge versus open-circuit-voltage (SOC-OCV) curve of the one cell to be detected in accordance with a state-of-health (SOH) of the one cell to be detected, so as to estimate an SOC as initial capacitance reference of the one cell to be detected in correspondence to the voltage detected from the one cell to be detected. The controller introduces a linear function using an SOC as initial capacitance reference as an input variable, using an OCV as an output variable, and having a predetermined inclination, and applies the SOC as initial capacitance reference of the one cell to be detected that the controller has estimated to the linear function, so as to derive an OCV. Then, in place of the voltage detected from the one cell to be detected, the controller uses the OCV that the controller has derived, so as to calculate the voltage difference at the first time and the voltage difference at the second time.

    MANAGEMENT DEVICE AND POWER STORAGE SYSTEM
    2.
    发明申请
    MANAGEMENT DEVICE AND POWER STORAGE SYSTEM 审中-公开

    公开(公告)号：US20190181663A1

    公开(公告)日：2019-06-13

    申请号：US16275242

    申请日：2019-02-13

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： SHINYA NISHIKAWA ,  YUSUKE ITAKURA ,  TAKASHI IIDA

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

    Abstract: A smoothing unit smooths a detected voltage of each power storage block based on previous data during a certain period. A calculator calculates a difference between a smoothing voltage of one power storage block in the n power storage blocks and a representative value of the smoothing voltages of the other power storage blocks or all the power storage blocks. A determination unit determines a power storage block whose difference against the representative value enlarges more than or equal to a set value during a predetermined period as a power storage block containing an abnormal power storage cell.

    MANAGEMENT DEVICE AND POWER STORAGE SYSTEM
    4.
    发明申请
    MANAGEMENT DEVICE AND POWER STORAGE SYSTEM 有权

    公开(公告)号：US20220294028A1

    公开(公告)日：2022-09-15

    申请号：US17633361

    申请日：2020-07-21

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： YUSUKE ITAKURA

    IPC: H01M10/42 ,  H01M50/583 ,  H01M10/48

    Abstract: In a management device that manages a power storage module in which a plurality of cell blocks in which a plurality of cells are connected in parallel are connected in series, a voltage detector detects a voltage of each of the plurality of cell blocks connected in series. The controller calculates a change value of a voltage of each of the plurality of cell blocks for a certain period of time, integrates absolute values of calculated voltage change values for each of the cell blocks, and determines presence or absence of a cell block including a separated cell that is electrically separated based on an integration value of voltage changes for each of the plurality of cell blocks.

    MANAGEMENT DEVICE AND POWER SUPPLY SYSTEM
    7.
    发明申请
    MANAGEMENT DEVICE AND POWER SUPPLY SYSTEM 有权

    公开(公告)号：US20210296911A1

    公开(公告)日：2021-09-23

    申请号：US17261058

    申请日：2019-06-12

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： YUSUKE ITAKURA ,  CHANGHUI YANG ,  SHINYA NISHIKAWA ,  TOHRU WATANABE

    IPC: H02J7/00 ,  B60L58/22 ,  B60L58/24 ,  G01R31/3835

    Abstract: A controller executes an equalization process of equalizing capacities of a plurality of cells, and a cell abnormality determination process of, of detected voltages of the plurality of cells, calculating a voltage difference between a representative voltage based on the detected voltage of at least one cell to be compared and the detected voltage of one cell to be detected at a first time and a second time, and when a difference between the two voltage differences is greater than or equal to a threshold value, determining that the cell to be detected is abnormal. In the case of executing the cell abnormality determination process during the equalization process, the controller provides the detected voltage of a target cell to be subjected to the equalization process with a compensation value corresponding to a voltage change based on energy transfer in the target cell due to the equalization process between the first time and the second time, and calculates the voltage difference at the second time.

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