Title:
POWER SUPPLY SYSTEM, DIAGNOSIS DEVICE, AND UNINTERRUPTIBLE POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/129378
Kind Code:
A1
Abstract:
The present invention addresses the problem of accurately diagnosing degradation in the capacity of a cell while ensuring back-up electrical power. As a solution to the problem, the present invention provides a power supply system comprising an uninterruptible power supply device (102) having a secondary cell (204), and a diagnosis device (104) for diagnosing degradation in the capacity of the secondary cell in the uninterruptible power supply device, the power supply system being configured so that: the uninterruptible power supply device operates in a normal mode in which the secondary cell can be charged to a first state of charge, or a diagnostic mode in which the secondary cell can be charged to a second state of charge that is higher than the first state of charge; and the diagnosis device switches the uninterruptible power supply device from the normal mode to the diagnostic mode to diagnose degradation in the capacity of the secondary cell in the uninterruptible power supply device using a capacity region between the first state of charge and the second state of charge.
Inventors:
KAWAHARA YOUHEI (JP)
TAKAHASHI HIROFUMI (JP)
YONEMOTO MASAHIRO (JP)
TAKEDA KENJI (JP)
TAKAHASHI HIROFUMI (JP)
YONEMOTO MASAHIRO (JP)
TAKEDA KENJI (JP)
Application Number:
PCT/JP2019/040374
Publication Date:
June 25, 2020
Filing Date:
October 15, 2019
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01M10/48; G01R31/385; G01R31/392; H01M10/42; H02J7/00; H02J7/34; H02J9/06
Foreign References:
| JP2004120856A | 2004-04-15 | |||
| JP2007120960A | 2007-05-17 | |||
| JP2014110692A | 2014-06-12 | |||
| JP2015111058A | 2015-06-18 | |||
| JPH08126225A | 1996-05-17 | |||
| JPH099524A | 1997-01-10 |
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (JP)
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