公开(公告)号：US20240385250A1

公开(公告)日：2024-11-21

申请号：US18788857

申请日：2024-07-30

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Yuta SHIMONISHI ,  Kazuya TAKIZAWA

IPC: G01R31/367 ,  G01R31/389 ,  G01R31/392

Abstract: A SOH indicating a deterioration degree of a secondary battery is estimated. SOH information of the secondary battery is acquired. Information indicating a battery state of the secondary battery and information indicating the battery state having a correlation with the SOH higher than a predetermined correlation are acquired. A SOH estimation model is built by synthesizing a regression model using a variance-covariance matrix, in which the SOH information is defined as an output, and the information indicating the battery state that has the correlation with the SOH higher than the predetermined correlation is defined as an input The SOH is estimated by inputting information indicating a current battery state of the secondary battery into the SOH estimation model.

公开(公告)号：US20230375637A1

公开(公告)日：2023-11-23

申请号：US18363558

申请日：2023-08-01

Applicant: DENSO CORPORATION

Inventor： Shuhei YOSHIDA ,  Kazuya TAKIZAWA ,  Yuta SHIMONISHI ,  Hiroyoshi YAMAMOTO ,  Sho NAGASHIMA

IPC: G01R31/392 ,  H01M10/42 ,  G01R31/36 ,  G16Y40/20 ,  G16Y20/20

CPC classification number: G01R31/392 ,  H01M10/4285 ,  G01R31/3648 ,  G16Y40/20 ,  G16Y20/20 ,  H01M2220/20

Abstract: A battery diagnostic system includes an interpolation processing unit, a degradation estimation unit, a degradation prediction unit, and an output unit. When a part of the battery load history is missing, the interpolation processing unit interpolates the missing part using the rest of the constituent data. The degradation estimation unit estimates, based on the battery load history, a present degradation state of the secondary battery and a cause of degradation that has brought about the degradation state. The degradation prediction unit predicts, using a predicted battery load, the present degradation state and the cause of degradation of the secondary battery, a predicted degradation state of the secondary battery that will occur in the future upon having been used in the use mode. The output unit outputs the predicted degradation state of the secondary battery.

公开(公告)号：US20230417840A1

公开(公告)日：2023-12-28

申请号：US18363511

申请日：2023-08-01

Applicant: DENSO CORPORATION

Inventor： Hiroyoshi YAMAMOTO ,  Shuhei YOSHIDA ,  Yuta SHIMONISHI ,  Sho NAGASHIMA ,  Kazuya TAKIZAWA

IPC: G01R31/396 ,  G01R31/392 ,  G01R31/3842 ,  G01R31/3828 ,  G01R31/36

CPC classification number: G01R31/396 ,  G01R31/392 ,  G01R31/3648 ,  G01R31/3828 ,  G01R31/3842

Abstract: A battery management system includes a usage history acquisition unit, a deterioration estimation unit, a battery load acquisition unit, a deterioration change degree identification unit, and a battery management unit. The usage history acquisition unit acquires usage history information. The deterioration estimation unit estimates a current deterioration state and a deterioration factor of the secondary battery based on the usage history information. The battery load acquisition unit acquires battery load information indicating a future battery load. The deterioration change degree identification unit identifies a deterioration change degree by using the current deterioration state, the deterioration factor and the battery load information of the secondary battery. The battery management unit uses the deterioration change degree to associate secondary batteries with future use modes so that an evaluation value indicating a degree of deterioration of the secondary battery in use devices becomes a minimum value.