公开(公告)号：US20230155117A1

公开(公告)日：2023-05-18

申请号：US17916944

申请日：2021-03-23

Applicant: GS Yuasa International Ltd.

Inventor： Hiromasa Muramatsu ,  Heisuke Nishikawa

IPC: H01M4/38 ,  H01M4/66

CPC classification number: H01M4/382 ,  H01M4/661 ,  H01M2004/027

Abstract: One aspect of the present invention is a nonaqueous electrolyte energy storage device including: a negative electrode containing a lithium alloy containing gold, and lithium metal; a positive electrode; and a nonaqueous electrolyte, in which the negative electrode includes a negative electrode substrate including a metal foil and a coating layer coating the negative electrode substrate, the metal foil contains copper, nickel, or stainless steel as a main component, and the coating layer contains gold as a main component.

公开(公告)号：US20230152376A1

公开(公告)日：2023-05-18

申请号：US17917019

申请日：2021-03-24

Applicant: GS Yuasa International Ltd.

Inventor： Yuki IMANAKA

IPC: G01R31/327 ,  H01H47/00 ,  G01R19/165 ,  H02J7/00 ,  G01R31/00

CPC classification number: G01R31/3275 ,  H01H47/002 ,  G01R19/165 ,  H02J7/0031 ,  G01R31/006

Abstract: A method for diagnosing failure of a current breaking device 21A included in a power supply system 12 of a vehicle 1 includes: a supply step of supplying power to a first electric load 11 and a first energy storage apparatus 13 by a power supply apparatus 14; a command step of commanding the current breaking device 21A to perform cutoff while power is supplied from the power supply apparatus 14 to the first electric load 11 and the first energy storage apparatus 13; and a determination step of measuring a charge current of a secondary battery 20A by a current sensor 21B while the cutoff is commanded to the current breaking device 21A, and determining presence or absence of failure of the current breaking device 21A based on a measured current value.

公开(公告)号：US11644514B2

公开(公告)日：2023-05-09

申请号：US16651904

申请日：2018-10-02

Applicant: GS Yuasa International Ltd.

Inventor： Kazuki Furukawa ,  Hiroki Matsui

IPC: G01R31/392 ,  H01M10/42 ,  H01M10/48

CPC classification number: G01R31/392 ,  H01M10/4285 ,  H01M10/48

Abstract: A deterioration amount estimation device includes a calculation unit (CPU33) that calculates a deterioration amount of an energy storage device and an estimation unit (CPU33) that estimates a transient deterioration amount based on a deterioration amount calculated by the calculation unit and a continuous deterioration amount that does not decrease with time and continues. The transient deterioration amount is estimated, and the input/output of the energy storage device is limited to suppress an increase in the continuous deterioration amount.

公开(公告)号：US20230130712A1

公开(公告)日：2023-04-27

申请号：US17909473

申请日：2021-03-03

Applicant: GS Yuasa International Ltd.

Inventor： Daisuke ENDO ,  Naoki INOUE ,  Takanori MAHARA

IPC: H01M4/58 ,  H01M4/62 ,  H01M10/0525

Abstract: The positive active material for an energy storage device according to one aspect of the present invention has an olivine-type crystal structure, has a surface at least partially coated with carbon, and satisfies either (A) or (B) below. (A) a pore volume in a range of a pore size of 60 nm or more and 200 nm or less determined by a BJH method from a desorption isotherm using a nitrogen gas adsorption method is 0.05 cm3/g or more and 0.25 cm3/g or less, and a pore specific surface area in a range of a pore size of 10 nm or more and 200 nm or less using a nitrogen gas adsorption method is 5 m2/g or more; (B) a full width at half maximum ratio (200)/(131) of a peak corresponding to a (200) plane to a peak corresponding to a (131) plane by a powder X-ray diffraction method using a CuKα ray in a charged state is 1.10 or less.

公开(公告)号：US20230113038A1

公开(公告)日：2023-04-13

申请号：US17913683

申请日：2021-03-22

Applicant: GS Yuasa International Ltd.

Inventor： Mayu YAMAKAWA ,  Shinya UEMATSU

IPC: H01M4/133 ,  H01M10/0525

Abstract: A positive electrode for an energy storage device according to one aspect of the present invention includes a positive active material layer containing a positive active material and a carbon nanotube, in which in a Log differential pore volume distribution of the positive active material layer measured by a mercury intrusion method, an average value of a ratio of a Log differential pore volume to a pore diameter in a range of a pore diameter of 20 nm or more and 200 nm or less is 3000 cm2/g or more.

公开(公告)号：US11621130B2

公开(公告)日：2023-04-04

申请号：US16640676

申请日：2018-11-16

Applicant: Robert Bosch GmbH ,  GS Yuasa International Ltd.

Inventor： Daichi Itakura

IPC: H02J7/00 ,  H01G11/14 ,  H01G11/32 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M10/42 ,  H01M10/44 ,  H01M10/48

Abstract: Provided is an energy storage apparatus capable of appropriately controlling use of a silicon material in normal times and achieving long life, and a method of using the energy storage apparatus. One aspect of the present invention is an energy storage apparatus that includes an energy storage device and a measuring section for measuring an internal pressure change rate of the energy storage device, the energy storage device having a negative electrode that contains a carbon material and a silicon material. Another aspect of the present invention is a method of using the energy storage apparatus that includes performing discharge while the internal pressure change rate of the energy storage device is measured.

公开(公告)号：US11619674B2

公开(公告)日：2023-04-04

申请号：US17254767

申请日：2019-06-19

Applicant: GS Yuasa International Ltd.

Inventor： Nan Ukumori

IPC: G01R31/385 ,  G06N7/00 ,  H01M10/48 ,  G01R31/392 ,  G01R31/36

Abstract: A state estimation method for an energy storage device includes: acquiring, by a first method, a first probability distribution that expresses the state of the energy storage device 61 in the form of a probability distribution; acquiring, by a second method, a second probability distribution that expresses the state of the energy storage device in the form of a probability distribution; and estimating the state of the energy storage device on the basis of the first probability distribution and the second probability distribution.

公开(公告)号：US11610743B2

公开(公告)日：2023-03-21

申请号：US16647424

申请日：2018-09-14

Applicant: GS Yuasa International Ltd.

Inventor： Kazuto Maeda ,  Shohei Yamao

IPC: H01G11/80 ,  H01M50/543

Abstract: An energy storage device includes an electrode terminal including a plate-like terminal body and a shaft portion connected to the terminal body, and an upper insulating member disposed between the terminal body and the case, the upper insulating member having a through-hole through which the shaft portion penetrates. The upper insulating member has a sidewall portion disposed along an end surface of the terminal body. The sidewall portion is provided with a thin portion at a position on a side of a center point of the shaft portion in a direction orthogonal to an extending direction of the sidewall portion in a plan view.

公开(公告)号：US20230083169A1

公开(公告)日：2023-03-16

申请号：US17802095

申请日：2021-03-10

Applicant: GS Yuasa International Ltd.

Inventor： Yuki Ueda

IPC: G01R19/165 ,  H01M10/48

Abstract: An energy storage apparatus 20 includes: energy storage devices B1 to B4; a cutoff switch 40 that cuts off current of the energy storage device; a parallel circuit 70 including a rectifier element 75 in which a discharge direction is set to a forward direction, the parallel circuit 70 being connected in parallel to the cutoff switch 40; a first current sensor 50 that measures the current of the energy storage devices B1 to B4; a discharge circuit 90 that discharges an inspection current to the first current sensor 50 through a discharge path including the parallel circuit 70 using the energy storage device as a power source; and a controller 80. The controller 80 determines whether the first current sensor 50 correctly measures the current based on a measurement value of the inspection current Ib.

公开(公告)号：US20230078256A1

公开(公告)日：2023-03-16

申请号：US17984687

申请日：2022-11-10

Applicant: GS Yuasa International Ltd.

Inventor： Daisuke Endo ,  Hiromasa Muramatsu

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/505 ,  C01G53/00 ,  H01M10/0525

Abstract: Disclosed is a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide, in which the lithium transition metal composite oxide has an α-NaFeO2 structure, a molar ratio Li/Me of Li and a transition metal (Me) of 1.05≤Li/Me≤1.4, and a porosity of 5 to 15%.