Title:
BATTERY MEASUREMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/215438
Kind Code:
A1
Abstract:
This battery measurement system (100) comprises: a first control unit (22) that instructs an AC signal; a signal application unit (21) that applies the AC signal to a battery assembly (10); a first detection unit (23) that detects the impedance of the battery assembly on the basis of a reference signal corresponding to the AC signal and a fluctuation in the voltage of the battery assembly occurring when the AC signal is applied to the battery assembly; a second detection unit (32) that detects the impedance of cell blocks (111 to 116) on the basis of a temporary signal related to the AC signal and fluctuations in the voltage of the cell blocks occurring when the AC signal is applied to the battery assembly; and a correction unit (22) that compares a vector total value obtained by totaling the impedance of the cell blocks as detected by the second detection unit and a vector value serving as the impedance of the battery assembly as detected by the first detection unit to thereby specify a difference in phase between the reference signal and the temporary signal, and that corrects the phase of the impedance of the cell blocks on the basis of the aforementioned difference in phase.
Inventors:
MIZOGUCHI TOMOMICHI (JP)
Application Number:
PCT/JP2022/011098
Publication Date:
October 13, 2022
Filing Date:
March 11, 2022
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01R27/02; G01R31/389
Domestic Patent References:
| WO2021045172A1 | 2021-03-11 | |||
| WO2018186423A1 | 2018-10-11 | |||
| WO2021085347A1 | 2021-05-06 |
Foreign References:
| JP2021048019A | 2021-03-25 | |||
| JP2011047666A | 2011-03-10 | |||
| US20200014220A1 | 2020-01-09 |
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (JP)
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