公开(公告)号：US20220320568A1

公开(公告)日：2022-10-06

申请号：US17635511

申请日：2020-08-19

Applicant: GS Yuasa International Ltd.

Inventor： Kenta UEHIRA ,  Masashi TAKANO

IPC: H01M10/04 ,  H01M10/0525 ,  H01M10/0587 ,  H01M10/34 ,  H01M10/44

Abstract: A method for manufacturing an energy storage device according to one aspect of the present invention includes: housing, in a case, an electrode assembly in which a negative electrode and a positive electrode are stacked; housing an electrolyte solution in the case; housing a gas, soluble in the electrolyte solution, in the case after the electrolyte solution is housed in the case; and sealing the case in a state where the gas soluble in the electrolyte solution is housed in the case.

公开(公告)号：US20230006188A1

公开(公告)日：2023-01-05

申请号：US17784562

申请日：2020-12-15

Applicant: GS YUASA INTERNATIONAL LTD.

Inventor： Ukyo HARINAGA ,  Masashi TAKANO ,  Kenta UEHIRA ,  Tomonori KAKO

IPC: H01M4/133 ,  H01M4/66 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0587 ,  H01G11/32

Abstract: An energy storage device according to an aspect of the present invention includes: a negative electrode including a negative substrate made of pure aluminum or an aluminum alloy, a conductive layer directly or indirectly layered on the negative substrate and containing a conductive agent, and a negative active material layer containing a negative active material capable of occluding lithium ions at a potential of 0.05 V vs. Li/Li+ or lower; and a positive electrode opposed to the negative electrode and including a positive substrate and a positive active material layer directly or indirectly layered on the positive substrate, and the negative active material layer is layered on the negative substrate and the conductive layer so as to include a region in contact with the negative substrate and a region in contact with the conductive layer.

公开(公告)号：US20210296645A1

公开(公告)日：2021-09-23

申请号：US17258354

申请日：2019-07-18

Applicant: GS Yuasa International Ltd.

Inventor： Tomonori KAKO ,  Masashi TAKANO ,  Kenta UEHIRA

IPC: H01M4/525 ,  H01M10/0569 ,  H01M4/583 ,  H01M10/48

Abstract: An aspect of the present invention is a nonaqueous electrolyte energy storage device including: a positive electrode having a positive composite layer including a positive active material; a negative electrode having a negative composite layer including a negative active material; and a nonaqueous electrolyte including a nonaqueous solvent, in which the positive active material includes a lithium-transition metal composite oxide that contains nickel as a transition metal and has a layered α-NaFeO2-type crystal structure, a ratio (N/P) between mass (N) per unit area of the negative active material and mass (P) per unit area of the positive active material is 0.30 or more and 0.45 or less, the nonaqueous solvent contains PC, DEC, and EMC, a content of the PC in the nonaqueous solvent is 25% by volume or more and 55% by volume or less, a total content of the DEC and the EMC in the nonaqueous solvent is 45% by volume or more and 75% by volume or less, and a content of the DEC is equal to or higher than the content of the EMC.

公开(公告)号：US20250006916A1

公开(公告)日：2025-01-02

申请号：US18711183

申请日：2022-11-16

Applicant: GS Yuasa International Ltd.

Inventor： Kenta UEHIRA ,  Yuto YAMAKAWA ,  Kenta NAKAI ,  Takashi KANEKO ,  Taisei SEKIGUCHI

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/583 ,  H01M10/0525

Abstract: A nonaqueous electrolyte energy storage device according to one aspect of the present invention includes: a positive electrode including a lithium transition metal composite oxide containing a nickel element and a manganese element; and a negative electrode including solid graphite, the solid graphite has a porosity of 2% or less, and the content of the nickel element with respect to the transition metal element in the lithium transition metal composite oxide is 40 mol % or more.

公开(公告)号：US20240322119A1

公开(公告)日：2024-09-26

申请号：US18578125

申请日：2022-07-11

Applicant: GS Yuasa International Ltd.

Inventor： Jun OYAMA ,  Kenta NAKAI ,  Takashi KANEKO ,  Kenta UEHIRA ,  Tomonori KAKO ,  Yuto YAMAKAWA ,  Taisei SEKIGUCHI

IPC: H01M4/133 ,  H01G11/24 ,  H01G11/42 ,  H01G11/50 ,  H01M4/02 ,  H01M10/0525

CPC classification number: H01M4/133 ,  H01G11/24 ,  H01G11/42 ,  H01G11/50 ,  H01M4/02 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: An energy storage device according to one aspect of the present invention includes: a negative electrode including a negative active material layer; and a nonaqueous electrolyte. The negative active material layer contains a negative active material. The negative active material contains natural graphite particles. The natural graphite particles have an internal porosity of 2% or less. A state of charge of the negative active material in a charged state is 0.6 or less.

公开(公告)号：US20230100420A1

公开(公告)日：2023-03-30

申请号：US17910014

申请日：2021-03-10

Applicant: GS Yuasa International Ltd.

Inventor： Kazuki KAWAGUCHI ,  Keiji SHIMOMURA ,  Masashi TAKANO ,  Kenta UEHIRA

IPC: H01M4/133

Abstract: A nonaqueous electrolyte energy storage device according to one aspect of the present invention is a nonaqueous electrolyte energy storage device including: a negative electrode including a negative electrode material layer; and a nonaqueous electrolyte containing an unsaturated cyclic carbonate, in which the negative electrode material layer contains a solid graphite particle with an aspect ratio of 1 or more and 5 or less, and the amount of substance of the unsaturated cyclic carbonate with respect to a surface area of the negative active material layer is 0.03 mmol/m2 or more and 0.08 mmol/m2 or less.