Title:
METHOD FOR DIAGNOSING BATTERY, DIAGNOSTIC PROGRAM FOR BATTERY, BATTERY MANAGEMENT DEVICE, AND POWER STORAGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/051613
Kind Code:
A1
Abstract:
A control unit of this battery management device charges/discharges a battery with a constant current of a direct current for a prescribed time, and diagnoses the state of the battery. With respect to a change in increase of a value obtained by defining, as a square root of time, a time elapsed from the start of charging/discharging, a variation point is specified at which a voltage increase obtained by subtracting an open loop voltage of a battery from a measurement voltage of the battery is changed from a curved line shape to a straight line shape. A voltage increase from a voltage at the time when the charging/discharging starts to a voltage at the variation point is specified as a voltage increase caused by resistance components of electrolyte and a cathode and anode of the battery, and a voltage increase from the voltage at the variation point is specified as a voltage increase caused by a diffusion resistance component of the battery.
Inventors:
SADA TOMOKAZU
Application Number:
PCT/JP2017/024477
Publication Date:
March 22, 2018
Filing Date:
July 04, 2017
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G01R31/36; H01M10/42; H01M10/44; H01M10/48; H02J7/00
Domestic Patent References:
| WO2011135609A1 | 2011-11-03 |
Foreign References:
| JP2014149280A | 2014-08-21 | |||
| JP2014006189A | 2014-01-16 | |||
| JP2013160538A | 2013-08-19 | |||
| JP2011054413A | 2011-03-17 | |||
| JP2013088148A | 2013-05-13 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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