Title:
METHOD OF ESTIMATING BATTERY STATE, DEVICE, PROGRAM, AND STORAGE MEDIUM
Document Type and Number:
Japanese Patent JP2021150220
Kind Code:
A
Abstract:
To provide a method of accurately estimating a full-charging amount or a correlation of an open circuit voltage and a charging rate for batteries having different characteristics, a device, a program, and a storage medium.SOLUTION: A method of estimating a battery state, includes: steps 202, 206, and 212 of measuring a voltage and a charging/discharging current of a battery in time series; steps 203 and 213 of calculating an open circuit voltage of the battery at two different time points on the basis of the measured voltage; a step 214 of calculating an open circuit voltage change amount ΔOCV between the two different time points on the basis of the open circuit voltage; a step 207 of calculating an electric amount change amount ΔQ at the two different time points on the basis of the measured charging/discharging current; and a step 216 of calculating proportions ΔOCV/ΔQ and ΔQ/ΔOCV of the open circuit voltage change amount and the electric amount change amount. A full-charging capacity of the battery is estimated on the basis of the proportion of the open circuit voltage change amount and the electric amount change amount and the existed correlation with the full-charging capacity of a plurality of batteries having different full-charging capacity.SELECTED DRAWING: Figure 1
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Inventors:
IWANE NORIYASU
YOKOYAMA SHINJI
SATO ETSUZO
YOKOYAMA SHINJI
SATO ETSUZO
Application Number:
JP2020050590A
Publication Date:
September 27, 2021
Filing Date:
March 23, 2020
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD
FURUKAWA AUTOMOTIVE SYSTEMS INC
FURUKAWA AUTOMOTIVE SYSTEMS INC
International Classes:
H01M10/48; B60L1/00; B60L3/00; B60L50/60; B60L58/18; H02J7/00
Attorney, Agent or Firm:
Einzel Felix-Reinhard
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima
Shuichi Sumiyoshi
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima
Shuichi Sumiyoshi