公开(公告)号：US20220348109A1

公开(公告)日：2022-11-03

申请号：US17765223

申请日：2020-10-02

Applicant: GS Yuasa International Ltd.

Inventor： Naohisa OKAMOTO ,  Kazuki SEKIYA ,  Yasuyuki HAMANO ,  Hidetoshi WADA

IPC: B60L58/12 ,  G01R31/367 ,  G01R31/374 ,  G01R31/379

Abstract: An estimation device includes: an acquisition unit that acquires a voltage, a current, and a temperature of a lead-acid battery; a first deriving unit that derives a first SOC and a second SOC that are SOCs of a start point and an end point of an estimation period; a second deriving unit that derives a total amount of an overcharge amount in the estimation period; a third deriving unit that derives an actual measurement error based on a difference between the first SOC and the second SOC and the total amount of the overcharge amount; a first specification unit that specifies an estimation error based on the first SOC, the second SOC, and the temperature, and a relationship between the first SOC, the second SOC, and the temperature of the lead-acid battery, and the estimation error; a second specification unit that specifies an abnormality degree of the actual measurement error based on the derived actual measurement error and the specified estimation error; and an estimation unit that estimates generation of an internal short-circuit of the lead-acid battery based on the abnormality degree.

公开(公告)号：US20220367927A1

公开(公告)日：2022-11-17

申请号：US17765210

申请日：2020-10-02

Applicant: GS Yuasa International Ltd.

Inventor： Kazuki SEKIYA ,  Naohisa OKAMOTO ,  Yasuyuki HAMANO ,  Hidetoshi WADA

IPC: H01M10/42 ,  H01M10/48

Abstract: An estimation device includes an acquisition unit that acquires current, voltage, and temperature of a lead-acid battery, a data accumulation unit that accumulates an integrated value or a calculated value of the current, voltage, and temperature that are acquired, an identification unit that identifies specific gravity of an electrolyte solution of the lead-acid battery based on history data accumulated in the data accumulation unit, an estimation unit that estimates a freezing risk of the lead-acid battery based on identified specific gravity of an electrolyte solution, and an output unit that outputs an estimation result of the estimation unit.