Title:
INTERNAL RESISTANCE CALCULATION DEVICE, COMPUTER PROGRAM, AND INTERNAL RESISTANCE CALCULATION METHOD
Document Type and Number:
WIPO Patent Application WO/2017/047192
Kind Code:
A1
Abstract:
An internal resistance calculation device equipped with: a voltage acquisition unit for acquiring the voltage of a secondary battery; a current acquisition unit for acquiring the current of a secondary battery; a switching determination unit for determining a switch has occurred between charging and discharging of the secondary battery, on the basis of the acquired current; a specification unit for specifying a standby interval, on the basis of a boundary frequency band in which diffusion impedance, which is caused by the diffusion process of a prescribed ion and constitutes part of the impedance spectrum of the secondary battery, contributes to the impedance of the secondary battery; and a resistance calculation unit for calculating the internal resistance of the secondary battery on the basis of the voltage and current acquired after the specified standby interval, when determined that a charging/discharging switch has occurred.
Inventors:
TAKECHI HIROAKI (JP)
KATAOKA TOMOMI (JP)
YAMAGUCHI YOUHEI (JP)
HATANAKA AOI (JP)
KATAOKA TOMOMI (JP)
YAMAGUCHI YOUHEI (JP)
HATANAKA AOI (JP)
Application Number:
PCT/JP2016/068651
Publication Date:
March 23, 2017
Filing Date:
June 23, 2016
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
G01R27/02; G01R31/36
Foreign References:
| JP2014035283A | 2014-02-24 | |||
| JP2010175484A | 2010-08-12 | |||
| JP2015109237A | 2015-06-11 |
Other References:
See also references of EP 3351945A4
Attorney, Agent or Firm:
KOHNO, Hideto et al. (JP)
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