Title:
BATTERY MONITORING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/224682
Kind Code:
A1
Abstract:
A battery monitoring device (96) monitors a battery pack (93) that includes a serially connected body of a plurality of cell batteries (B). An impedance detection unit (31) of the battery monitoring device detects the impedance (Z) of the plurality of cell batteries when a pack storage amount changes, i.e., when the storage amount of the battery pack changes over time. A storage amount identification unit (32) of the battery monitoring device identifies that the storage amount (Q) of a cell battery has reached a specific storage amount (QL, QU) on the basis of the change (Zdd) in the change trend (Zd) of the detected impedance. A variation computation unit (33) of the battery monitoring device computes the variation (ΔQ) in the storage amount between cell batteries on the basis of the differences, among the cell batteries, in the identification timings (tP, tS) at which the storage amount was identified to have reached the specific storage amount.
Inventors:
KURACHI TAISUKE (JP)
UCHIYAMA MASAKI (JP)
HORI YUUKI (JP)
UCHIYAMA MASAKI (JP)
HORI YUUKI (JP)
Application Number:
PCT/JP2022/013587
Publication Date:
October 27, 2022
Filing Date:
March 23, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H02J7/00; H01M10/48; H02J7/02
Foreign References:
| JPH11185823A | 1999-07-09 | |||
| JP2018151194A | 2018-09-27 |
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (JP)
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