Title:
充電率推定装置及び充電率推定方法
Document Type and Number:
Japanese Patent JP6855947
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress deterioration of estimation accuracy for a charging rate of a battery after a charge/discharge stop.SOLUTION: A charging rate estimation device 1 comprises: a voltage detection part 3 for detecting a voltage of a battery B; a calculation part 41 for calculating a charging rate of the battery B corresponding to a closed circuit voltage detected by the voltage detection part 3 during charging of the battery B as an upper limit value; an estimation part 42 for estimating an open circuit voltage in depolarization of the battery B and estimating the charging rate of the battery B from the estimated open circuit voltage; and a selection part 43 for selecting the charging rate estimated by the estimation part 42 as the charging rate of the battery B in the case where the charging rate estimated by the estimation part 42 is equal to or smaller than the upper limit value during a charge/discharge stop of the battery B, or selecting the upper limit value as the charging rate of the battery B in the case where the charging rate estimated by the estimation part 42 is greater than the upper limit value.SELECTED DRAWING: Figure 1
Inventors:
Junichi Hatano
Takahiro Tsuchi
Yuki Muramatsu
Takahiro Tsuchi
Yuki Muramatsu
Application Number:
JP2017114386A
Publication Date:
April 07, 2021
Filing Date:
June 09, 2017
Export Citation:
Assignee:
KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
International Classes:
G01R31/382; H01M10/48; H02J7/00
Domestic Patent References:
| JP2009204314A | ||||
| JP2013083496A | ||||
| JP2013182779A |
Foreign References:
| US20160059727 |
Attorney, Agent or Firm:
Yoshiyuki Osuga