Title:
BATTERY SYSTEM MONITORING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/188397
Kind Code:
A1
Abstract:
The present invention addresses the problem of obtaining a battery system monitoring device capable of suppressing erroneous detection of a diagnosis abnormality in an integration circuit caused by a low-frequency ripple noise. The battery system monitoring device (100) removes first noise included in a cell voltage of a plurality of single cells (101) which are connected in series on the basis of a first time constant, and calculates a cell total voltage by totaling the cell voltages of the plurality of single cells (101) from which the first noise has been removed. Second noise included in a cell voltage between the positive electrode of the highest single cell (101) of the plurality of single cells connected in series and the negative electrode of the lowest single cell (101) thereof is removed on the basis of a second time constant, and VBLK voltage, which is the cell voltage from which the second noise has been removed, is measured. On the basis of the cell total voltage and the VBLK voltage, a determination regarding whether or not to permit a diagnosis of the state of the plurality of single cells (101) is made, and the diagnosis about the state of the plurality of single cells (101) is performed when it has been determined that the diagnosis may be performed.
Inventors:
ARIMA TOMOYUKI (JP)
Application Number:
PCT/JP2022/016903
Publication Date:
October 05, 2023
Filing Date:
March 31, 2022
Export Citation:
Assignee:
VEHICLE ENERGY JAPAN INC (JP)
International Classes:
H02J7/00; H01M10/48; H02J7/02
Foreign References:
| JP2020010562A | 2020-01-16 | |||
| JP2014121231A | 2014-06-30 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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