公开(公告)号：US20250006891A1

公开(公告)日：2025-01-02

申请号：US18828803

申请日：2024-09-09

Applicant: GS Yuasa International Ltd.

Inventor： Shinnosuke ICHIKAWA ,  Nobuhiro NAKAJIMA ,  Takashi SHIMIZU ,  Akihito TANOI ,  Heisuke NISHIKAWA

IPC: H01M4/134 ,  H01M4/02 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0567 ,  H01M10/0569

Abstract: A negative electrode includes a negative active material layer containing a silicon-based negative active material, a rubber-based binder, and a carbon nanotube, wherein a content of the silicon-based negative active material in the negative active material layer is 68 mass % or more, a content of the rubber-based binder in the negative active material layer is 3.0 mass % or more, and a content of the carbon nanotube in the negative active material layer is 0.4×(n2+4n)/(2n+3) mass % or less where n is the number of layers of graphene forming the carbon nanotube.

公开(公告)号：US20240168099A1

公开(公告)日：2024-05-23

申请号：US18551505

申请日：2022-03-09

Applicant: GS Yuasa International Ltd.

Inventor： Shinnosuke ICHIKAWA ,  Shinya MIYAZONO ,  Akihito TANOI ,  Heisuke NISHIKAWA ,  Nobuhiro NAKAJIMA ,  Takashi SHIMIZU

IPC: G01R31/3842 ,  G01R31/3828 ,  H01M4/48 ,  H01M10/42 ,  H01M10/48 ,  H01M4/02 ,  H02J7/00

CPC classification number: G01R31/3842 ,  G01R31/3828 ,  H01M4/483 ,  H01M10/425 ,  H01M10/48 ,  H01M2004/027 ,  H02J7/0048

Abstract: An estimation device is a device that estimates a charge state of an energy storage device including a negative electrode having a negative active material that contains Si. The estimation device includes a control unit that determines based on a charge-discharge history of the energy storage device whether or not to perform a first estimation method of estimating a charge state of the energy storage device by using a relationship between the charge state and a voltage of the energy storage device.