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：US20230163302A1

公开(公告)日：2023-05-25

申请号：US17910456

申请日：2021-03-10

Applicant: GS Yuasa International Ltd.

Inventor： Kazuki KAWAGUCHI ,  Jun OYAMA ,  Taisei SEKIGUCHI ,  Tomonori KAKO

IPC: H01M4/587

CPC classification number: H01M4/587 ,  H01M2004/027

Abstract: An energy storage device according to an aspect of the present invention includes a negative electrode and a positive electrode, the negative electrode includes a negative substrate and a negative active material layer directly or indirectly layered on the negative substrate, the negative active material layer contains a negative active material, the negative active material contains solid graphite particles as a main component, the aspect ratio of the solid graphite particles is 1 or more and 5 or less, and a negative electrode utilization factor that is the proportion of the amount of charge per mass of the negative active material in a full charge state to a theoretical capacity per mass of graphite is 0.65 or more.

公开(公告)号：US20220085414A1

公开(公告)日：2022-03-17

申请号：US17420333

申请日：2019-12-03

Applicant: GS Yuasa International Ltd.

Inventor： Kazuki KAWAGUCHI ,  Jun OYAMA ,  Taisei SEKIGUCHI ,  Tomonori KAKO

IPC: H01M10/0568 ,  H01M4/587 ,  H01M4/58 ,  H01M10/0525 ,  H01G11/62 ,  H01G11/42 ,  H01G11/50 ,  H01G11/06 ,  H01G11/86

Abstract: One aspect of the present invention is an energy storage device including; a negative electrode containing a negative active material; a positive electrode containing a positive active material; and a nonaqueous electrolyte. The negative active material contains solid graphite particles with an aspect ratio of 1 to 5 as a main component, and the nonaqueous electrolyte contains an imide salt containing phosphorus or sulfur.

公开(公告)号：US20210273219A1

公开(公告)日：2021-09-02

申请号：US17257877

申请日：2019-07-18

Applicant: GS Yuasa International Ltd.

Inventor： Tomonori KAKO ,  Kazuki KAWAGUCHI ,  Shota ITO ,  Jun OYAMA ,  Taisei SEKIGUCHI

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/133 ,  H01M4/62 ,  H01M10/0562 ,  H01M10/0525

Abstract: One aspect of the present invention is an energy storage device including a positive electrode containing: first positive active material particles containing a metal element capable of forming a conductive metal oxide; and second positive active material particles not containing the metal element, in which the first positive active material particles include a nickel-cobalt-manganese-containing lithium-transition metal composite oxide containing lithium, nickel, cobalt, and manganese as constituent elements, and the first positive active material particles are larger in median diameter than the second positive active material particles.

公开(公告)号：US20210399347A1

公开(公告)日：2021-12-23

申请号：US17279134

申请日：2019-09-26

Applicant: GS Yuasa International Ltd.

Inventor： Taro YAMAFUKU ,  Kenta NAKAI ,  Jun OYAMA

IPC: H01M10/0587 ,  H01G11/58 ,  H01G11/22 ,  H01G11/52 ,  H01G11/84

Abstract: Provided is a method for manufacturing an energy storage device including an electrode that has an active material layer, an electrolyte solution, and a case. According to the present embodiment, the method including injecting an electrolyte solution in a predetermined amount into a case is characterized in that the predetermined amount is an amount such that, an alkali metal or an alkaline earth metal at least partially comes into contact with a free electrolyte solution that is the electrolyte solution excluding the electrolyte solution soaking into the electrode assembly in the case, with the case housing therein: the alkali metal or the alkaline earth metal of an ion supply member that has the alkali metal or the alkaline earth metal disposed on a conductive member other than the active material layer; and an electrode assembly including the stacked electrode that has electrical conduction to the conducive member of the ion supply member.