Title:
ESTIMATION DEVICE AND ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/090541
Kind Code:
A1
Abstract:
The present invention is an estimation device (1) comprising an overvoltage calculation unit (20) for calculating the overvoltage of a battery (50) on the basis of a measured value for a current flowing through the battery (50) and a measured value for the terminal voltage of the battery (50), and an estimation unit (30) having a system identification unit and an effective resistance calculation unit, wherein the estimation device (1) is characterized in that the system identification unit identifies the system of the battery (50) by estimating the parameters of each term in a polynomial constituting an FIR model on the basis of time-series data pertaining to the current and the overvoltage, and the effective resistance calculation unit calculates the effective resistance on the basis of the system of the battery (50), the system identification unit dividing the polynomial constituting the FIR model into a plurality of time segments and estimating a common parameter with respect to the terms included in the respective time segments to thereby estimate a smaller number of parameters than the number of terms in the polynomial of the FIR model.
Inventors:
OSAMURA KENSUKE (JP)
KAWAGUCHI TAKAHIRO (JP)
ADACHI SHUICHI (JP)
MARUTA ICHIRO (JP)
KAWAGUCHI TAKAHIRO (JP)
ADACHI SHUICHI (JP)
MARUTA ICHIRO (JP)
Application Number:
PCT/JP2023/038812
Publication Date:
May 02, 2024
Filing Date:
October 27, 2023
Export Citation:
Assignee:
MARELLI CORP (JP)
UNIV KEIO (JP)
UNIV KYOTO (JP)
UNIV GUNMA NAT UNIV CORP (JP)
UNIV KEIO (JP)
UNIV KYOTO (JP)
UNIV GUNMA NAT UNIV CORP (JP)
International Classes:
G01R31/367; G01R31/3828; G01R31/388; G01R31/389; H01M10/48; H02J7/00
Domestic Patent References:
| WO2020145402A1 | 2020-07-16 |
Other References:
TAKAHIRO KAWAGUCHI: "Recursive Estimation of Effective Resistance for Rechargeable Batteries with µ-Markov Model", vol. 52, no. 6, 1 November 2021 (2021-11-01), pages 1323 - 1328, XP093162642
T OHYAMA: "Recursive identification of time-varying system of internal impedance with vector-type forgetting factor", 63RD AUTOMATIC CONTROL UNION LECTURE, 14 December 2020 (2020-12-14), pages 351 - 354, XP093162648
RISAKO SASAKI: "Internal Impedance Estimation of Rechargeable Batteries in Automobiles Using μ-Markov Model", TRANSACTIONS OF THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS, KEISOKU JIDO SEIGYO GAKKAI, TOKYO, JP, vol. 56, no. 2, 1 January 2020 (2020-01-01), JP , pages 67 - 69, XP093162655, ISSN: 0453-4654, DOI: 10.9746/sicetr.56.67
TAKAHIRO KAWAGUCHI: "System identification with piecewise-constant finite impulse response model and its statistical property", IFAC-PAPERSONLINE - 16TH IFAC SYMPOSIUM ON CONTROL IN TRANSPORTATION SYSTEMS CTS 2021 LILLE, FRANCE, 8-10 JUNE 2021, FRANKFURT ; MUNCHEN [U.A.] : ELSEVIER ; LUXENBURG, DE, vol. 56, no. 2, 1 January 2023 (2023-01-01), DE , pages 3972 - 3977, XP093162656, ISSN: 2405-8963, DOI: 10.1016/j.ifacol.2023.10.1350
T OHYAMA: "Recursive identification of time-varying system of internal impedance with vector-type forgetting factor", 63RD AUTOMATIC CONTROL UNION LECTURE, 14 December 2020 (2020-12-14), pages 351 - 354, XP093162648
RISAKO SASAKI: "Internal Impedance Estimation of Rechargeable Batteries in Automobiles Using μ-Markov Model", TRANSACTIONS OF THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS, KEISOKU JIDO SEIGYO GAKKAI, TOKYO, JP, vol. 56, no. 2, 1 January 2020 (2020-01-01), JP , pages 67 - 69, XP093162655, ISSN: 0453-4654, DOI: 10.9746/sicetr.56.67
TAKAHIRO KAWAGUCHI: "System identification with piecewise-constant finite impulse response model and its statistical property", IFAC-PAPERSONLINE - 16TH IFAC SYMPOSIUM ON CONTROL IN TRANSPORTATION SYSTEMS CTS 2021 LILLE, FRANCE, 8-10 JUNE 2021, FRANKFURT ; MUNCHEN [U.A.] : ELSEVIER ; LUXENBURG, DE, vol. 56, no. 2, 1 January 2023 (2023-01-01), DE , pages 3972 - 3977, XP093162656, ISSN: 2405-8963, DOI: 10.1016/j.ifacol.2023.10.1350
Attorney, Agent or Firm:
KIOIZAKA THEMIS LAW OFFICES (JP)
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