公开(公告)号：US12025676B2

公开(公告)日：2024-07-02

申请号：US17585936

申请日：2022-01-27

Applicant: DENSO CORPORATION

Inventor： Tomomi Asai ,  Nobuo Yamamoto ,  Hiroyasu Suzuki ,  Katsuki Hayashi ,  Yuya Minabe

IPC: G01R31/392 ,  G01R31/396 ,  H01M10/42

CPC classification number: G01R31/392 ,  G01R31/396 ,  H01M10/42

Abstract: A degradation degree assessment device for a secondary battery is to assess a degree of degradation of a secondary battery and includes a battery characteristic acquisition unit, a capacity estimation unit, and an assessment unit. The battery characteristic acquisition unit acquires a battery characteristic relating to a voltage transition of the secondary battery in a predetermined voltage section. The assessment unit assesses the degree of degradation of the secondary battery based on the battery characteristic acquired by the battery characteristic acquisition unit or based on a battery characteristic-related value computed on the basis of the battery characteristic.

公开(公告)号：US20230122626A1

公开(公告)日：2023-04-20

申请号：US18068691

申请日：2022-12-20

Applicant: DENSO CORPORATION

Inventor： Tomomi ASAI ,  Nobuo Yamamoto ,  Hiroyasu Suzuki ,  Katsuki Hayashi ,  Yuya Minabe

IPC: G01R31/392 ,  H02J7/00 ,  G01R31/371 ,  G01R31/3842

Abstract: A server for a deterioration degree determination system for a secondary battery includes an estimation formula memory unit and an update unit. The estimation formula memory unit stores an estimation formula for determining a deterioration degree based on a battery characteristic related to transition of a battery state over a predetermined voltage section in the secondary battery or a battery characteristic relationship value related to the battery characteristic. The update unit that updates the estimation formula stored in the estimation formula memory unit based on the battery characteristic related to the transition of the battery state of the secondary battery acquired by charging and discharging the secondary battery in an external terminal.

公开(公告)号：US20230118313A1

公开(公告)日：2023-04-20

申请号：US18068650

申请日：2022-12-20

Applicant: DENSO CORPORATION

Inventor： Tomomi ASAI ,  Nobuo Yamamoto ,  Hiroyasu Suzuki ,  Katsuki Hayashi ,  Yuya Minabe

IPC: G01R31/392 ,  G01R31/3835 ,  G01R31/367

Abstract: In a deterioration degree determination device for a secondary battery, a battery information acquisition unit acquires battery information related to the secondary battery, and a feasibility determination unit determines feasibility of determination of deterioration degree for each secondary battery based on the battery information and a feasibility determination reference prepared in advance. A battery characteristic acquisition unit acquires a battery characteristic related to transition of a battery state in a predetermined voltage section for the secondary battery for which the determination of the deterioration degree is determined to be feasible by the feasibility determination unit. A deterioration degree determination unit determines the deterioration degree of the secondary battery for which the determination of the deterioration degree is determined to be feasible, based on the battery characteristic acquired by the battery characteristic acquisition unit or a battery characteristic relationship value calculated based on the battery characteristic.