公开(公告)号：EP4446763A1

公开(公告)日：2024-10-16

申请号：EP22904230.4

申请日：2022-12-06

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  The Furukawa Battery Co., Ltd.

Inventor： TANIMURA Yudai ,  NAKAMURA Hideto ,  KUTSUMA Ayaka ,  SATO Toshiyuki ,  YOSHIDA Hideaki

IPC: G01R31/392 ,  G01R31/379 ,  G01R31/3828 ,  G01R31/385 ,  H01M10/42 ,  H01M10/44 ,  H01M10/48 ,  H02J7/00

Abstract: Provided are a lead-acid battery system and a lead-acid battery life estimation method, which can contribute to improvement of reliability by more accurately estimating a degradation degree of a lead-acid battery regardless of a degradation cause. A transition determination unit (131) that determines switching of charging/discharging process of a lead-acid battery (B), a current value determination unit (132) that detects a change in a discharge current value during a discharge period of the lead-acid battery (B), a calculation unit (133) that, when the current value determination unit (132) determines that a change occurred in the discharge current value, calculates a CT value on the basis of a discharge current value acquired for each section divided by the change, and a degradation determination unit (135) that determines a degradation degree of the lead-acid battery (B) using the CT value calculated by the calculation unit (133) are included.

公开(公告)号：EP4474839A1

公开(公告)日：2024-12-11

申请号：EP23749617.9

申请日：2023-01-25

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  The Furukawa Battery Co., Ltd.

Inventor： NAKAMURA Hideto ,  TANIMURA Yudai ,  KUTSUMA Ayaka ,  SATO Toshiyuki ,  YOSHIDA Hideaki

IPC: G01R31/392 ,  G01R31/379 ,  G01R31/3828 ,  H01M10/48 ,  H02J7/00

Abstract: Provided are a lead-acid battery system and a lead-acid battery life estimation method capable of accurately estimating a remaining life of a lead-acid battery by calculating a capacity turnover value during operation in consideration of a magnitude of a depth of discharge (DOD). The lead-acid battery system (S) estimates the remaining life of the lead-acid battery (B) by comparing a capacity turnover value from the beginning to the end of life with the capacity turnover value during operation. The lead-acid battery system (S) includes a capacity turnover value calculation unit (137) that calculates the capacity turnover value during operation. The capacity turnover value calculation unit (137) calculates the capacity turnover value during operation by using a DOD-based correction coefficient Kdod(c) calculated based on the DOD representing the depth of discharge calculated by dividing an integrated discharge capacity after the start of the discharge of the lead-acid battery (B) by a rated capacity of the lead-acid battery (B).

公开(公告)号：EP4446762A1

公开(公告)日：2024-10-16

申请号：EP22904229.6

申请日：2022-12-06

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  The Furukawa Battery Co., Ltd.

Inventor： TANIMURA Yudai ,  NAKAMURA Hideto ,  KUTSUMA Ayaka ,  SATO Toshiyuki ,  YOSHIDA Hideaki

IPC: G01R31/392 ,  G01R31/379 ,  G01R31/3828 ,  G01R31/385 ,  H01M10/42 ,  H01M10/44 ,  H01M10/48 ,  H02J7/00

Abstract: Provided are a lead-acid battery system and a lead-acid battery life estimation method, which can contribute to improvement of reliability by more accurately estimating a degradation degree of a lead-acid battery regardless of a degradation cause. A transition determination unit (131) that determines switching of charging/discharging process of a lead-acid battery (B), a calculation unit (132) that calculates a CT value on the basis of a discharge current value during a discharge period of a storage battery, and a degradation determination unit (134) that determines a degradation degree of the lead-acid battery using the CT value calculated by the calculation unit (132) are included.

公开(公告)号：EP4474842A1

公开(公告)日：2024-12-11

申请号：EP23749620.3

申请日：2023-01-25

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  The Furukawa Battery Co., Ltd.

Inventor： KUTSUMA Ayaka ,  NAKAMURA Hideto ,  TANIMURA Yudai ,  SATO Toshiyuki ,  YOSHIDA Hideaki

IPC: G01R31/392 ,  G01R31/379 ,  H01M10/48 ,  H02J7/00

Abstract: Provided are a lead-acid battery system and a lead-acid battery life estimation method capable of accurately estimating a remaining life of a lead-acid battery by calculating a capacity turnover value during operation (CT value during operation) in consideration of at least one of a lower limit state of charge (SOC) or a low SOC dwell time. A capacity turnover value calculation unit (138), (237), (337), or (440) of the lead-acid battery system (S) calculates the CT value during operation by using at least one of a lower-limit-SOC-based correction coefficient K LSOC calculated based on a lower limit SOC which is an SOC having the smallest value when the lead-acid battery (B) is charged and discharged once, respectively, or a low-SOC-dwell-time-based correction coefficient K t_LSOC calculated based on a low SOC dwell time t LSOC which is an elapsed time until the next discharge or charge starts when a discharge ends below a reference SOC.

公开(公告)号：EP4474841A1

公开(公告)日：2024-12-11

申请号：EP23749619.5

申请日：2023-01-25

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  The Furukawa Battery Co., Ltd.

Inventor： KUTSUMA Ayaka ,  NAKAMURA Hideto ,  TANIMURA Yudai ,  SATO Toshiyuki ,  YOSHIDA Hideaki

IPC: G01R31/392 ,  G01R31/379 ,  H01M10/48 ,  H02J7/00

Abstract: Provided are a lead-acid battery system and a lead-acid battery life estimation method capable of accurately estimating a remaining life of a lead-acid battery by calculating a capacity turnover value during operation (CT value during operation) in consideration of at least one of an upper limit state of charge (SOC) or an upper limit voltage. A capacity turnover value calculation unit (138), (237), or (337) of the lead-acid battery system (S) calculates the CT value during operation by using at least one of an upper-limit-SOC-based correction coefficient K HSOC calculated based on the upper limit SOC which is an SOC having the largest value when the lead-acid battery (B) is charged, and an upper-limit-voltage-based correction coefficient K HV calculated based on the upper limit voltage which is the highest voltage when the lead-acid battery (B) is charged.

公开(公告)号：EP4474840A1

公开(公告)日：2024-12-11

申请号：EP23749618.7

申请日：2023-01-25

Applicant: FURUKAWA ELECTRIC CO., LTD. ,  The Furukawa Battery Co., Ltd.

Inventor： KUTSUMA Ayaka ,  NAKAMURA Hideto ,  TANIMURA Yudai ,  SATO Toshiyuki ,  YOSHIDA Hideaki

IPC: G01R31/392 ,  G01R31/379 ,  G01R31/3828 ,  H01M10/48 ,  H02J7/00

Abstract: Provided are a lead-acid battery system and a lead-acid battery life estimation method capable of accurately estimating a remaining life of a lead-acid battery by calculating a capacity turnover value during operation in consideration of the number of equalization charges of the lead-acid battery or an overcharge rate integrated value of the equalization charge of the lead-acid battery. The lead-acid battery system (S) estimates the remaining life of the lead-acid battery (B) by comparing a capacity turnover value from the beginning to the end of life with the capacity turnover value during operation. A capacity turnover value calculation unit (137) or (237) in the lead-acid battery system (S) calculates the capacity turnover value during operation by using an equalization-charge-number-based correction coefficient K CN calculated based on the number of equalization charges (E) or a charge-rate-based correction coefficient K CP calculated based on the overcharge rate integrated value of the equalization charge (E).