Title:
STATE OF CHARGE ESTIMATING DEVICE AND STATE OF CHARGE ESTIMATING METHOD
Document Type and Number:
WIPO Patent Application WO/2014/112181
Kind Code:
A1
Abstract:
Provided are a state of charge estimating device and a state of charge estimating method that intermittently charge after discharging, quickly neutralize polarization by intermittently discharging after charging, and estimate state of charge using the open circuit voltage after polarization has been neutralized. A state of charge estimating device comprises: a calculation unit to calculate the slope of the voltage of a battery in predetermined first period after the battery finishes discharging; a determination unit to determine whether the slope in the first period is larger than a threshold value that determines whether polarization has been neutralized; a charging unit to charge the battery, in a second period for charging the battery, when the slope is determined to be larger than the threshold value; and an estimation unit to estimate the charging state using the open circuit voltage when the slope is determined to be less than or equal to the threshold value during a first period after the battery finishes discharging or after the second period.
Inventors:
KIDONO MASASHI (JP)
NISHIGAKI KENJI (JP)
TSUZUKI TAKAHIRO (JP)
NOMURA HIROYUKI (JP)
MATSUI TADASUMI (JP)
NISHIGAKI KENJI (JP)
TSUZUKI TAKAHIRO (JP)
NOMURA HIROYUKI (JP)
MATSUI TADASUMI (JP)
Application Number:
PCT/JP2013/079725
Publication Date:
July 24, 2014
Filing Date:
November 01, 2013
Export Citation:
Assignee:
TOYOTA JIDOSHOKKI KK (JP)
International Classes:
G01R31/36; H01M10/44; H01M10/48; H02J7/00
Foreign References:
| JP2004301783A | 2004-10-28 | |||
| JP2008233092A | 2008-10-02 | |||
| JP2011043460A | 2011-03-03 |
Attorney, Agent or Firm:
OSUGA, Yoshiyuki (JP)
Yoshiyuki Osuge (JP)
Yoshiyuki Osuge (JP)
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