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.

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：US20180080996A1

公开(公告)日：2018-03-22

申请号：US15554694

申请日：2016-03-14

Applicant: GS Yuasa International Ltd.

Inventor： Taro YAMAFUKU ,  Masaki MASUDA ,  Kazuki KAWAGUCHI ,  Masashi TAKANO

IPC: G01R31/36

CPC classification number: G01R31/392 ,  G01R31/389 ,  H01M10/425 ,  H01M10/48 ,  H02J7/0073 ,  H02J7/0077

Abstract: According to an embodiment of the present invention, deterioration of a non-aqueous electrolyte power storage element is detected based on a first increase rate and a second increase rate, the first increase rate being an increase rate of a direct current resistance value obtained by measuring the non-aqueous electrolyte power storage element over a first time period, the second increase rate being an increase rate of a direct current resistance value obtained by measuring the non-aqueous electrolyte power storage element over a second time period that is longer than the first time period.

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：US20200295364A1

公开(公告)日：2020-09-17

申请号：US16765203

申请日：2018-11-21

Applicant: GS Yuasa International Ltd.

Inventor： Sumio MORI ,  Tomonori KAKO ,  Akihiko MIYAZAKI ,  Masashi TAKANO ,  Ukyo HARINAGA

IPC: H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525

Abstract: The present embodiment provides a lithium ion secondary battery including a positive electrode containing LiaNixCoyMzO2 (0.9≤a≤1.2, 0.3≤x≤0.8, 0.2≤y+z≤0.7, where M is a metal element other than Li, Ni, and Co) as a positive active material, and a negative electrode containing non-graphitic carbon as a negative active material. In this lithium ion secondary battery, at a portion where the positive electrode and the negative electrode face each other, a basis weight (P) of the positive active material and a basis weight (N) of the negative active material satisfy a relational expression of 0.65≤P/N≤1.05.

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：US20190237764A1

公开(公告)日：2019-08-01

申请号：US16328184

申请日：2017-08-28

Applicant: GS Yuasa International Ltd.

Inventor： Masashi TAKANO ,  Akihiko MIYAZAKI

IPC: H01M4/587 ,  H01G11/32 ,  H01G11/26 ,  H01G11/86 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/587 ,  C01P2002/02 ,  C01P2006/14 ,  C01P2006/17 ,  C01P2006/40 ,  H01G11/24 ,  H01G11/26 ,  H01G11/32 ,  H01G11/38 ,  H01G11/86 ,  H01M4/0404 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027

Abstract: There is provided is an energy storage device having improved power performance at a relatively large current. In the present embodiment, an energy storage device is provided, which has a negative active material layer containing particulate amorphous carbon, wherein a distribution curve of differential pore volume in the negative active material layer has a peak appearing within the range from 0.1 μm to 2 μm inclusive and the differential pore volume at the peak is 0.9 cm3/g or more.

公开(公告)号：US20160093859A1

公开(公告)日：2016-03-31

申请号：US14863956

申请日：2015-09-24

Applicant: GS Yuasa International Ltd.

Inventor： Kazuki KAWAGUCHI ,  Masashi TAKANO ,  Taro YAMAFUKU ,  Masaki MASUDA

IPC: H01M2/16

CPC classification number: H01M2/1673

Abstract: An energy storage device includes: an electrode having a composite layer formed by applying a composite directly or indirectly onto a substrate and a non-applied portion, onto which the composite is not applied; and a separator layered on the electrode to face the composite layer. Here, a drawn area is formed in at least. a part of the non-applied portion, and an intermediate layer is interposed at least between the drawn area and the composite layer.

Abstract translation: 能量存储装置包括：电极，其具有通过将复合材料直接或间接施加到基底上的复合层和未施加复合材料的未施加部分; 以及在电极上层叠以面对复合层的隔板。 这里，至少形成了绘制区域。 至少在所述拉伸区域和所述复合层之间插入中间层。