公开(公告)号：US20240159835A1

公开(公告)日：2024-05-16

申请号：US18423449

申请日：2024-01-26

Applicant: DENSO CORPORATION

Inventor： Masaki UCHIYAMA ,  Shunichi Kubo ,  Taisuke Kurachi ,  Yuuki Hori

IPC: G01R31/3835 ,  G01R31/378 ,  G01R31/396 ,  H01M4/58 ,  H01M4/583 ,  H01M10/42 ,  H02J7/00

CPC classification number: G01R31/3835 ,  G01R31/396 ,  H01M10/4285 ,  H02J7/0048 ,  G01R31/378 ,  H01M4/5825 ,  H01M4/583

Abstract: A battery monitoring device is applied to an assembled battery having a plurality of battery cells connected in series, the battery cells including a first battery cell and a second battery cell. The battery monitoring device includes: an acquisition unit configured to acquire, during charging or discharging of the battery cells, a battery parameter of each of the first and second battery cells, the battery parameter of each of the first and second battery cells being a terminal voltage across the corresponding one of the first and second battery cells or an impedance of the corresponding one of the first and second battery cells; and a state calculation unit configured to calculate a difference between the acquired battery parameter of the first battery cell and the acquired battery parameter of the second battery cell, and calculate a battery state of the battery cells based on the calculated difference.