公开(公告)号：US20210339653A1

公开(公告)日：2021-11-04

申请号：US17377692

申请日：2021-07-16

Applicant: DENSO CORPORATION

Inventor： Nobuo YAMAMOTO ,  Shuhei YOSHIDA ,  Katsuki HAYASHI ,  Takehiko YAMAKI ,  Hiroyasu SUZUKI ,  Yuya MINABE

IPC: B60L58/22 ,  G01R31/392 ,  G01R31/396 ,  G01R31/367 ,  H01M10/48

Abstract: In a system for setting power supply of reusable secondary cell modules, a degradation level estimation unit estimates a degradation level of a cell-module performance of each of a plurality of secondary cell modules, based on: the history information items about the respective the secondary cell modules acquired by a history information collection unit; and the cell-module performances of the respective secondary cell modules collected by a cell performance collection unit. A suppliable quantity prediction unit predicts a suppliable quantity of power of each of the plurality of secondary cell modules in accordance with the degradation level of the cell-module performance of a corresponding one of the plurality of secondary cell modules. A supply balance setting unit sets a power supply balance among the plurality of secondary cell modules based on the suppliable quantity of power of each of the plurality of secondary cell modules predicted by the prediction unit.

公开(公告)号：US20200371145A1

公开(公告)日：2020-11-26

申请号：US16992578

申请日：2020-08-13

Applicant: DENSO CORPORATION

Inventor： Nobuo YAMAMOTO ,  Ichiro YAMADA ,  Shuhei YOSHIDA ,  Masaya NAKAMURA ,  Takehiko YAMAKI ,  Hiroyasu SUZUKI ,  Katsuki HAYASHI

IPC: G01R27/26 ,  G01R31/389 ,  G01R31/388

Abstract: An abnormality determination device for a secondary battery includes an internal-resistance calculation unit, a threshold memory unit, a capacity balance comparison unit, and an abnormality determination unit. The internal-resistance calculation unit detects an internal resistance in a negative-electrode reaction resistance dominant region in which a reaction resistance of a negative electrode is dominant in a charge and discharge reaction of the secondary battery. The threshold memory unit stores a capacity balance threshold used as a reference for determining abnormality in a balance between a capacity of a positive electrode and a capacity of the negative electrode in the secondary battery. The capacity balance comparison unit compares the internal resistance calculated by the internal-resistance calculation unit with the capacity balance threshold stored in the threshold memory unit. The abnormality determination unit determines abnormality in capacity balance in the secondary battery based on a comparison result from the capacity balance comparison unit.

公开(公告)号：US20230118311A1

公开(公告)日：2023-04-20

申请号：US18068828

申请日：2022-12-20

Applicant: DENSO CORPORATION

Inventor： Tomomi ASAI ,  Nobuo YAMAMOTO ,  Hiroyasu SUZUKI ,  Katsuki HAYASHI ,  Yuya MINABE

IPC: G01R31/392 ,  G01R31/396 ,  G01R31/3835 ,  H02J7/00 ,  B60R16/033 ,  H01M10/48

Abstract: A deterioration degree determination device includes a charging and discharging control unit, a battery characteristic acquisition unit, and a determination unit. The charging and discharging control unit, in a state where multiple secondary batteries are connected to each other to form a battery pack, performs a charging and discharging operation of the battery pack while voltages of the secondary batteries are individually measured. The battery characteristic acquisition unit acquires a battery characteristic related to transition in a battery state over a predetermined voltage section for at least some of the multiple secondary batteries. The determination unit determines a deterioration degree of at least some of the multiple secondary batteries based on the battery characteristic or a battery characteristic relationship value calculated based on the battery characteristic.

公开(公告)号：US20220146590A1

公开(公告)日：2022-05-12

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

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.