Title:
CHARGE RATE ESTIMATION DEVICE AND CHARGE RATE ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2014/112175
Kind Code:
A1
Abstract:
Provided are a charge rate estimation device and charge rate estimation method for estimating with good precision the charge rate of a cell that has considerable polarization, that requires a long time to depolarize, and that has considerable charging and discharging hysteresis in SOC-OCV characteristics. The charge rate estimation device comprises: a voltage measurement unit for measuring the closed circuit voltage of a cell; a charge estimation unit for referencing charge mode information in which the charge rate and the closed circuit voltage of a cell when a charger is charging at a constant electric current using the measured closed circuit voltage are correlated, and estimating the charge rate in charge mode; and a discharge estimation unit for referencing discharge mode information in which the charge rate and the closed circuit voltage generated using a discharge pattern of the a cell obtained by actuating a vehicle using a determined actuation pattern using the measured closed circuit voltage are correlated, and estimating the charge rate in discharge mode.
Inventors:
NISHIGAKI KENJI (JP)
KIDONO MASASHI (JP)
TSUZUKI TAKAHIRO (JP)
NOMURA HIROYUKI (JP)
KIDONO MASASHI (JP)
TSUZUKI TAKAHIRO (JP)
NOMURA HIROYUKI (JP)
Application Number:
PCT/JP2013/079025
Publication Date:
July 24, 2014
Filing Date:
October 25, 2013
Export Citation:
Assignee:
TOYOTA JIDOSHOKKI KK (JP)
International Classes:
G01R31/36; B60L3/00; H01M10/48; H02J7/00; H02J7/10
Foreign References:
| JP2012247374A | 2012-12-13 | |||
| JPH11148966A | 1999-06-02 | |||
| JPH07198808A | 1995-08-01 |
Attorney, Agent or Firm:
OSUGA, Yoshiyuki (JP)
Yoshiyuki Osuge (JP)
Yoshiyuki Osuge (JP)
Download PDF: