Title:
電池システム
Document Type and Number:
Japanese Patent JP6834415
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a technology that can improve calculation accuracy of cathode potential while considering a memory effect in a battery system including an alkaline secondary battery.SOLUTION: ECU 30 calculates hydrogen concentration inside a cathode active material from a cathode open-circuit potential Uand an anode open-circuit potential Uby using a battery model for estimating an internal behavior of a single cell 11, including as an input an inter-terminal voltage V of a single cell 11 that is a nickel-hydrogen battery. The ECU 30 calculates, from the hydrogen concentration, an amount of memory that is an amount of change in potential of the cathode open-circuit potential Ucaused by a memory effect from an initial potential E. When the hydrogen concentration changes, the ECU 30 calculates a reduction in the amount of memory associated with the change in hydrogen concentration from the amount of memory M before the change in hydrogen concentration and the time elapsed from the change in hydrogen concentration, and calculates the cathode open-circuit potential Uby using the initial potential Eand the amount of memory M after the reduction.SELECTED DRAWING: Figure 1
Inventors:
Kenji Takahashi
Tomoko Yamauchi
Tomoko Yamauchi
Application Number:
JP2016231930A
Publication Date:
February 24, 2021
Filing Date:
November 30, 2016
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
G01R31/367; G01R31/382; H01M10/48
Domestic Patent References:
| JP2016103449A | ||||
| JP201691978A | ||||
| JP2006194789A | ||||
| JP2007333447A | ||||
| JP200422322A | ||||
| JP2000147075A | ||||
| JP6481661B2 | ||||
| JP6699390B2 | ||||
| JP20187410A | ||||
| JP201887785A | ||||
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Foreign References:
| WO2013105140A1 | ||||
| US20160023568 |
Attorney, Agent or Firm:
Fukami patent office