Title:
INTERNAL RESISTANCE MEASUREMENT SYSTEM, INTERNAL RESISTANCE MEASUREMENT DEVICE, AND INTERNAL RESISTANCE MEASUREMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2024/014447
Kind Code:
A1
Abstract:
The present invention measures the internal resistance of a battery at an appropriate timing when the influence of polarization is minimal. The internal resistance measurement system for measuring the internal resistance of a rechargeable battery comprises: an acquisition unit that acquires a voltage value of the battery and a current value of a current flowing from the battery; a discharge control unit that discharges the battery so that the battery is discharged in a predetermined pattern; and a measurement unit that measures the internal resistance of the battery on the basis of the voltage value and current value acquired by the acquisition unit, in a case where a difference between a reference voltage value acquired by the acquisition unit before the battery is discharged by the discharge control unit and a voltage value acquired by the acquisition unit after the battery is discharged by the discharge control unit is equal to or less than a threshold value determined in advance.
Inventors:
SUGIYAMA TAISHI (JP)
Application Number:
PCT/JP2023/025535
Publication Date:
January 18, 2024
Filing Date:
July 11, 2023
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
FURUKAWA AUTOMOTIVE SYSTEMS INC (JP)
FURUKAWA AUTOMOTIVE SYSTEMS INC (JP)
International Classes:
G01R31/389; H01M10/48; H02J7/00
Domestic Patent References:
| WO2017199629A1 | 2017-11-23 | |||
| WO2018066298A1 | 2018-04-12 |
Foreign References:
| JP2019204712A | 2019-11-28 | |||
| JP2014181924A | 2014-09-29 | |||
| JP2019114437A | 2019-07-11 | |||
| JP2013101076A | 2013-05-23 | |||
| CN103529301A | 2014-01-22 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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