公开(公告)号：US20210167425A1

公开(公告)日：2021-06-03

申请号：US15734177

申请日：2019-06-04

Applicant: GS Yuasa International Ltd.

Inventor： Katsuya OJI

IPC: H01M10/0587 ,  H01G9/02 ,  H01G9/048 ,  H01M10/04

Abstract: An energy storage device includes an electrode assembly having a negative electrode plate and a separator wound around a tubular core material. The core material has a first line part and a second line part extending along a first imaginary line and a second imaginary line parallel to a long side surface of a case, respectively. At least one of the first line part and the second line part has a curved portion that protrudes toward the other beyond the first imaginary line or the second imaginary line. An inner peripheral edge of the negative electrode plate is located at a position other than the curved portion in at least one of the first line part and the second line part.

公开(公告)号：US20220244317A1

公开(公告)日：2022-08-04

申请号：US17613754

申请日：2020-05-21

Applicant: GS Yuasa International Ltd.

Inventor： Katsuya OJI

IPC: G01R31/3835 ,  G01R31/367 ,  G01R31/388 ,  G01R31/392

Abstract: The estimation device 4 is provided with: a first acquisition unit 41 for acquiring SOC values obtained at the start and end of charging, discharging, or float-charging of a power storage element 3; a storage unit 42 storing multiple deterioration coefficients corresponding to multiple SOC ranges; an identification unit 41 for identifying, on the basis of the start and end SOC values acquired by the first acquisition unit 41, a corresponding deterioration coefficient from among the multiple deterioration coefficients stored in the storage unit 42; and an estimation unit 41 for estimating the deterioration of the power storage element 3 on the basis of the deterioration coefficient identified by the identification unit 41.

公开(公告)号：US20230268571A1

公开(公告)日：2023-08-24

申请号：US18012941

申请日：2021-06-18

Applicant: GS Yuasa International Ltd.

Inventor： Katsuya OJI

IPC: H01M10/48 ,  G01R31/374 ,  G01R31/392

CPC classification number: H01M10/486 ,  G01R31/374 ,  G01R31/392

Abstract: A temperature estimation device includes: a charge-discharge data acquisition unit that acquires charge-discharge data relating to charge-discharge of an energy storage device; an environmental temperature data acquisition unit that acquires temperature data relating to an environmental temperature of a battery board accommodating a plurality of the energy storage devices; and a temperature estimation unit that calculates an ambient temperature of the energy storage device in the battery board using the charge-discharge data and the temperature data, and estimates a temperature of the energy storage device using the calculated ambient temperature and the charge-discharge data.