Title:
BATTERY MONITORING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/085347
Kind Code:
A1
Abstract:
A battery monitoring device (50) applied to a battery assembly (40) in which a plurality of battery cells (42) are connected in series, the battery monitoring device (50) monitoring the state of each of the battery cells, comprises: a voltage acquisition unit (62) that passes AC current to each of the battery cells, and acquires a voltage fluctuation (Vi) for each of the battery cells when the AC current is passed; a calculation unit (61) that calculates, on the basis of the AC current and the voltage fluctuation, an impedance (Zi) and a phase difference (θi) for each of the battery cells; and a current control unit (90) that designates the AC current amplitude (Isi) and phase (θsi) for each of the battery cells. The current control unit specifies and designates the AC current amplitude and/or phase on the basis of the calculated impedance and phase difference so that the total value (Vt) of the voltage fluctuation is at or below a threshold value.
Inventors:
MIZOGUCHI TOMOMICHI (JP)
Application Number:
PCT/JP2020/040005
Publication Date:
May 06, 2021
Filing Date:
October 23, 2020
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
H01M10/48; G01R31/389; H02J7/00
Foreign References:
| JP2013537638A | 2013-10-03 | |||
| JP2018055957A | 2018-04-05 | |||
| JP2012181037A | 2012-09-20 | |||
| JPH08179017A | 1996-07-12 |
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (JP)
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