公开(公告)号：US20210265856A1

公开(公告)日：2021-08-26

申请号：US17253676

申请日：2019-02-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHINYA NISHIKAWA ,  TOHRU WATANABE ,  TAKASHI IIDA

IPC: H02J7/34 ,  H02J7/00 ,  G01R31/3835 ,  G01R31/396 ,  H01M10/44 ,  H01M10/48 ,  H01M10/42

Abstract: A voltage measurer measures a voltage of a battery cell. A controller controls charging-discharging of the battery cell. The controller performs control to apply a reverse current for canceling a polarization voltage of the battery cell through the battery cell after the completion of charging-discharging of the battery cell. For example, after the charging-discharging of the battery cell completes, the controller sets a current command value, in a power converter, that instructs flow of a reverse current of a preset value for a preset time.

公开(公告)号：US20230391221A1

公开(公告)日：2023-12-07

申请号：US18249259

申请日：2021-10-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TAKASHI MATSUDA ,  CHANGHUI YANG ,  TAKASHI IIDA ,  ATSUYOSHI KITA

IPC: B60L53/64 ,  H02J7/00 ,  B60L58/16 ,  B60L58/18

CPC classification number: B60L53/64 ,  H02J7/0048 ,  B60L58/18 ,  H02J7/0071 ,  B60L58/16 ,  H02J7/00712

Abstract: A path finder sets a plurality of nodes in a state of charge (SOC) zone that is between a target SOC, which is set when a secondary battery provided in an electric moving body is charged, and a present SOC, and sets a plurality of nodes in a chargeable time period that is between a charging start time and a charging end time. A cost assigner refers to at least one of storage degradation characteristics, charge cycle degradation characteristics, or a time-of-use electricity fee table to assign a cost of a degradation amount or an electricity fee to each path between nodes. The path finder finds the charging path that minimizes a total cost of the paths between the nodes. A charging plan creator creates a charging plan based on the charging path found.

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.

公开(公告)号：US20230236251A1

公开(公告)日：2023-07-27

申请号：US18002288

申请日：2021-06-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHINYA NISHIKAWA ,  TAKASHI IIDA ,  TOMOKAZU SADA

IPC: G01R31/367 ,  G01R31/3835

CPC classification number: G01R31/367 ,  G01R31/3835 ,  H01M2010/4278

Abstract: In an arithmetic system, a data acquisition unit acquires operation data at least including a voltage of a battery mounted on an identical product (for example, an electrically-driven vehicle of an identical vehicle type) and a state of charge (SOC) from a plurality of individuals of the product via a network. A detector statistically processes the plurality of pieces of acquired operation data to detect an individual on which a battery different from specifications of the product is mounted.

公开(公告)号：US20210129683A1

公开(公告)日：2021-05-06

申请号：US17145302

申请日：2021-01-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： JUN YAMASAKI ,  CHANGHUI YANG ,  MASAHARU AMAIKE ,  TAKASHI IIDA

IPC: B60L15/20 ,  B60L50/50 ,  B60L3/00 ,  H01M10/48 ,  H01M10/42 ,  H02J7/00 ,  G01R31/392 ,  G01R31/3842

Abstract: Controller determines an output limit value that defines an upper limit of a current or power recommended for suppressing cell deterioration based on a voltage, a current, and a temperature of each cell, and notifies host controller in electric vehicle of the determined output limit value. When electric vehicle climbs a hill, controller calculates a current value or power value to be discharged from power storage unit, the current value or power value being required for electric vehicle to climb the hill at a speed not less than a set minimum speed, while suppressing an amount of deterioration of cells within an allowable range, and when the calculated current value or power value is larger than the output limit value, replaces the output limit value with the calculated current value or power value.

公开(公告)号：US20250020731A1

公开(公告)日：2025-01-16

申请号：US18711877

申请日：2022-11-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHINYA NISHIKAWA ,  YUSUKE ITAKURA ,  MUTSUHIKO TAKEDA ,  TAKASHI IIDA

IPC: G01R31/396 ,  G01K1/02 ,  G01K3/14 ,  G01R31/3835 ,  G01R31/52

Abstract: A battery abnormality detection system includes the following constituents. A battery data acquisition unit acquires voltages of one of a plurality of cells and a plurality of parallel cell blocks in a battery pack and temperatures at a plurality of observation points respectively measured by a plurality of temperature sensors provided in the battery pack. A determination unit determines presence or absence of an abnormality in one of a specific cell and a specific parallel cell block, based on a transition of a voltage of the one of the specific cell and the specific parallel cell block in a predetermined period in the battery pack and on a difference between a temperature change at a first observation point and a temperature change at a second observation point in the predetermined period in the battery pack.

公开(公告)号：US20220026497A1

公开(公告)日：2022-01-27

申请号：US17311370

申请日：2019-11-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHINYA NISHIKAWA ,  TAKASHI IIDA ,  TOHRU WATANABE

IPC: G01R31/3842 ,  G01R31/367 ,  G01R31/385 ,  H01M10/48 ,  G01R31/36 ,  H01M4/485

Abstract: A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials. The equivalent circuit model is a model including a diffusion resistance component for each of the plurality of materials for use in the positive electrode and the negative electrode.

公开(公告)号：US20230065968A1

公开(公告)日：2023-03-02

申请号：US17759913

申请日：2020-12-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHINYA NISHIKAWA ,  TOMOKAZU SADA ,  TAKASHI IIDA ,  MASAAKI TAKEGATA

IPC: G01R31/396 ,  G01R31/374 ,  G01R31/3828 ,  G01R31/387 ,  G01R31/392

Abstract: In a calculation system, a data acquisition unit is configured to acquire operation data of a battery, the operation data including at least voltages and currents measured by a management device at a plurality of time points, and states of charge (SOCs) estimated based on at least one of the voltages and the currents, the management device being configured to manage the battery. An extraction unit is configured to, extract, as sample data, a set of an SOC and a voltage from sets of the SOCs and the voltages the plurality of time points included in the operation data in a period in which the battery is regarded as resting, the period being specified based on the currents. An estimation unit is configured to estimate an SOC-open circuit voltage (OCV) characteristic of the battery based on the extracted sample data.

公开(公告)号：US20220274619A1

公开(公告)日：2022-09-01

申请号：US17632822

申请日：2020-09-08

Applicant: Panasonic Intellectual Property Management Co.,Ltd.

Inventor： TAKASHI MATSUDA ,  CHANGHUI YANG ,  TAKASHI IIDA

IPC: B60W50/14 ,  B60W50/00 ,  B60L58/12 ,  B60L58/16

Abstract: An acquisition unit of in-vehicle notification device mounted on electric vehicle acquires a discharge current value discharged from secondary battery in electric vehicle to motor for running in electric vehicle. According to the acquired discharge current value, a notification unit notifies the driver of information indicating an impact of a current driving condition by the driver of electric vehicle on degradation of secondary battery.

公开(公告)号：US20220026498A1

公开(公告)日：2022-01-27

申请号：US17311373

申请日：2019-11-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHINYA NISHIKAWA ,  TOHRU WATANABE ,  TAKASHI IIDA

IPC: G01R31/3842 ,  G01R31/367 ,  H02J7/00 ,  B60L58/12 ,  H01M10/48 ,  H01M10/44

Abstract: A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell, and a state of charge (SOC) of the battery cell is estimated based on the estimated OCV, SOC-OCV characteristics on a charge side of the battery cell, and SOC-OCV characteristics on a discharge side of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials. Estimated is a current flowing through a material in which capacity-OCV characteristics are different between the charge side and the discharge side, the material being included in the plurality of materials contained in the mixed electrode, and a ratio between the SOC-OCV characteristics on the charge side and the SOC-OCV characteristics on the discharge side is determined based on the current.