Title:
Secondary battery diagnostic device
Document Type and Number:
Japanese Patent JP6350215
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To highly accurately calculate an internal resistance using voltage and current measurement values when a secondary battery is used.SOLUTION: An error parameter Pc between an actual current waveform of a secondary battery within a period retrospective to ΔT from present time and a prescribed template current waveform 110 over the ΔT is sequentially calculated, whereby a degree of correlation between the actual current waveform and the template current waveform 110 is sequentially monitored. When the error parameter Pc is smaller than a reference value Pt, it is determined that the degree of correlation becomes higher than a reference degree and an internal resistance of the secondary battery is calculated using measurement values of a battery current and a battery voltage within the period retrospective to ΔT from the time.SELECTED DRAWING: Figure 7
Inventors:
Yoshiyuki Nakayama
Application Number:
JP2014220311A
Publication Date:
July 04, 2018
Filing Date:
October 29, 2014
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
G01R31/36; H01M10/48; H02J7/00
Domestic Patent References:
| JP2004271445A | ||||
| JP2010250381A | ||||
| JP2004072927A | ||||
| JP2011257219A | ||||
| JP2011240896A | ||||
| JP64057182A |
Foreign References:
| US20110172939 |
Attorney, Agent or Firm:
Fukami patent office