Title:
LEAD-ACID BATTERY SYSTEM AND LEAD-ACID BATTERY SERVICE LIFE ESTIMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/149304
Kind Code:
A1
Abstract:
Provided are a lead-acid battery system and a lead-acid battery service life estimation method with which it is possible to calculate the capacity turnover value during operation (CT value during operation) upon taking the lower-limit SOC and/or the low-SOC dwell time into account, and thereby estimate the remaining service life of a lead-acid battery in an accurate manner. A capacity turnover value calculation unit (138), (237), (337), (440) of a lead-acid battery system (S) calculates the CT value during operation using at least one of: a lower-limit SOC correction factor KLSOC calculated on the basis of a lower-limit SOC, which is the SOC having the smallest value when a lead-acid battery (B) is charged once and discharged once; and low-SOC-dwell-time corrective factor Kt_LSOC calculated on the basis of a low-SOC dwell time tLSOC, which is the elapsed time, after discharging has stopped upon falling below a reference SOC, until the start of the next discharge or charge.
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Inventors:
KUTSUMA AYAKA (JP)
NAKAMURA HIDETO (JP)
TANIMURA YUDAI (JP)
SATO TOSHIYUKI (JP)
YOSHIDA HIDEAKI (JP)
NAKAMURA HIDETO (JP)
TANIMURA YUDAI (JP)
SATO TOSHIYUKI (JP)
YOSHIDA HIDEAKI (JP)
Application Number:
PCT/JP2023/002260
Publication Date:
August 10, 2023
Filing Date:
January 25, 2023
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
FURUKAWA BATTERY CO LTD (JP)
FURUKAWA BATTERY CO LTD (JP)
International Classes:
G01R31/392; G01R31/379; H01M10/48; H02J7/00
Domestic Patent References:
| WO2022030415A1 | 2022-02-10 |
Foreign References:
| JP2003161768A | 2003-06-06 | |||
| JP2008074257A | 2008-04-03 | |||
| JP6430054B1 | 2018-11-28 | |||
| CN103529399A | 2014-01-22 | |||
| CN112290637A | 2021-01-29 |
Other References:
NAKAJIMA HIDEHITO, TOKUNORI; MIDORIKAWA; KIYOSHI; AKASAKA; YUICHI; SHIBATA; SATOSHI; YOSHIDA; HIDEAKI; HASHIMOTO; KENSUKE; OGINO; : "Development of UltraBattery", DEVELOPMENT OF ULTRABATTERY, vol. 43, 1 January 2013 (2013-01-01), pages 2 - 9, XP093083358
NOGUCHI, HIROMASA, MANGAHARA, TOHRU: "Development of Long-life VRLA Battery for Deep Cycle Use", PROCEEDINGS OF THE 45TH BATTERY SYMPOSIUM IN JAPAN; 2004.11.27-29, 27 November 2004 (2004-11-27) - 29 November 2004 (2004-11-29), pages 502 - 503, XP009548358
NOGUCHI, HIROMASA, MANGAHARA, TOHRU: "Development of Long-life VRLA Battery for Deep Cycle Use", PROCEEDINGS OF THE 45TH BATTERY SYMPOSIUM IN JAPAN; 2004.11.27-29, 27 November 2004 (2004-11-27) - 29 November 2004 (2004-11-29), pages 502 - 503, XP009548358
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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