Title:
二次電池の劣化度推定装置および二次電池の劣化度推定方法
Document Type and Number:
Japanese Patent JP7044044
Kind Code:
B2
Abstract:
A controller of a deterioration estimation device for a secondary battery is configured to acquire a first open circuit voltage when a temperature of the secondary battery is a first temperature and a second open circuit voltage when the temperature of the secondary battery is a second temperature changed from the first temperature, and estimate a degree of deterioration of the secondary battery by using a difference between first and second slopes. The first slope is a ratio of a voltage change obtained by subtracting the first open circuit voltage from the second open circuit voltage to a temperature change obtained by subtracting the first temperature from the second temperature. The second slope is a ratio of the voltage change to the temperature change when the temperature of the new secondary battery has changed from the first temperature to the second temperature.
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Inventors:
Ryo Kaneda
Hiroki Nagai
Hiroki Nagai
Application Number:
JP2018229691A
Publication Date:
March 30, 2022
Filing Date:
December 07, 2018
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
H01M10/48; H01M10/42; H02J7/00
Domestic Patent References:
| JP2013190259A | ||||
| JP2017125680A | ||||
| JP2003100356A | ||||
| JP2011169817A | ||||
| JP2015522899A |
Foreign References:
| WO2008026476A1 |
Attorney, Agent or Firm:
Fukami patent office