公开(公告)号：US10991969B2

公开(公告)日：2021-04-27

申请号：US14824369

申请日：2015-08-12

Applicant: GS Yuasa International Ltd.

Inventor： Takeshi Sasaki ,  Taro Yamafuku ,  Masaki Masuda

IPC: H01M10/04 ,  H01M4/587 ,  H01M4/583 ,  H01M10/0525 ,  H01M10/052

Abstract: An energy storage device includes: a flattened electrode assembly formed by winding electrodes such that a hollow portion is formed, the electrode assembly including a pair of curved portions opposed manner in a major axis direction and a pair of flat portions opposed in a minor axis direction; and a case storing the electrode assembly therein, wherein assuming a thickness of the flat portion in the minor axis direction as A, a thickness of the curved portion in a radial direction as B, and a thickness of the hollow portion in the minor axis direction as W, the electrode assembly satisfies A+(W/2)≤B in a state where the electrode assembly is discharged.

公开(公告)号：US10962597B2

公开(公告)日：2021-03-30

申请号：US16766550

申请日：2018-12-04

Applicant: GS Yuasa International Ltd.

Inventor： Yuki Imanaka ,  Seiji Takai ,  Masayuki Imura

IPC: G01R31/00 ,  G01R31/367 ,  G01R35/00 ,  H01M10/42 ,  H01M10/48 ,  H02J7/00

Abstract: A measurement device 50 of an electrochemical element 30 that is connected, via a first switch 40, to a terminal part 22P having a load connected thereto, wherein: the measurement device 50 is provided with a current limitation unit 75 provided to a bypass path BP of the first switch 40, a current sensor 60 for measuring the current of the electrochemical element 30, and a processing unit 100; when a voltage difference ΔV between the voltage of the electrochemical element 30 and the voltage of the terminal part 22P is equal to or greater than a prescribed value, the current limitation unit 75 permits the supply of power to the load through the bypass path BP, and when the voltage difference ΔV is less than the prescribed value, the current limitation unit 75 cuts off the current to the bypass path BP; and in a period of time after the first switch 40 has been turned off and until the voltage difference ΔV reaches the prescribed value due to a change in voltage of the terminal part 22P because of discharging of a charge/discharge element 170 connected in parallel to the load, the processing unit 100 performs a measurement process to measure the offset error ε of the current sensor 60.

公开(公告)号：US20210050733A1

公开(公告)日：2021-02-18

申请号：US16964451

申请日：2019-01-18

Applicant: GS Yuasa International Ltd.

Inventor： Yuki IMANAKA ,  Takeyuki SHIRAISHI ,  Atsushi FUKUSHIMA

IPC: H02J7/00 ,  F02N11/08

Abstract: A management device for an energy storage device, includes a processing unit that manages the energy storage device. When the management device for the energy storage device has lost power due to a voltage drop of the energy storage device, the processing unit determines whether cause of the power loss is an external short circuit between external terminals of the energy storage device or an engine start, and the processing unit executes a response operation according to the occurrence of the external short circuit in the case of the external short circuit, and does not execute the response operation in the case of the engine start.

公开(公告)号：US10921374B2

公开(公告)日：2021-02-16

申请号：US15902763

申请日：2018-02-22

Applicant: GS Yuasa International Ltd.

Inventor： Naoya Wada ,  Takeyuki Shiraishi

IPC: G01R31/327 ,  H01H47/00 ,  G01R31/00 ,  F02N11/08 ,  H02J7/00 ,  G01R19/165 ,  H01H1/00 ,  H01H9/16

Abstract: A diagnosis device diagnoses current cutoff devices connected in parallel and disposed on an energization path to an energy storage device mounted on a vehicle. The diagnosis device performs switch processing of switching one of the current cutoff devices to be diagnosed from an opened state to a closed state or from the closed state to the opened state and closing the other current cutoff device while an engine of the vehicle is stopped. The diagnosis device detects end-to-end voltage of the current cutoff device when current larger than a threshold flows through the current cutoff device after the switch processing, and diagnoses the current cutoff device based on the detected end-to-end voltage.

公开(公告)号：US20210043930A1

公开(公告)日：2021-02-11

申请号：US16965137

申请日：2019-02-01

Applicant: GS Yuasa International Ltd.

Inventor： Yusuke MIZUNO

IPC: H01M4/525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/0525 ,  C01G51/00

Abstract: One aspect of the present invention is a positive active material containing an oxide containing lithium and a transition metal element M, in which the transition metal element M is cobalt, iron, copper, manganese, nickel, chromium, or a combination thereof, and in an X-ray diffraction pattern of the oxide, a ratio (Ia/Ib) of peak intensity Ia appearing in a range where 2θ is 20 to 25° and peak intensity Ib appearing in a range where 2θ is 30 to 35° is 0.2 or more and 0.8 or less.

公开(公告)号：US20210033675A1

公开(公告)日：2021-02-04

申请号：US16981855

申请日：2019-03-14

Applicant: GS Yuasa International Ltd.

Inventor： Nan UKUMORI

IPC: G01R31/367 ,  G01R31/392 ,  G01R31/382 ,  G01R31/374 ,  H01M10/48 ,  H01M10/0525 ,  H02J7/00

Abstract: This degradation estimating device is provided with: a state of health (SOH) acquiring unit which acquires the SOH of an energy storing device at a first time point, and acquires the SOH at a second time point later than the first time point; a representative value acquiring unit which acquires a representative value of the state of charge (SOC) of the energy storing device during the period from the first time point to the second time point; and a learning processing unit which causes a learning model to learn on the basis of learning data in which the SOH at the first time point and the representative value serve as input data, and the SOH at the second time point serves as output data.

公开(公告)号：US20210020885A1

公开(公告)日：2021-01-21

申请号：US17042723

申请日：2019-03-27

Applicant: GS Yuasa International Ltd.

Inventor： Masumi OGAWA

IPC: H01M2/16 ,  H01M10/0587 ,  H01M2/26

Abstract: An energy storage device includes an electrode assembly, a positive-electrode current collector, and an insulating sheet. The electrode assembly has a main body part and a connecting part projecting from the main body part and connected to the positive-electrode current collector. The insulating sheet has a sheet side surface part facing a side surface of the main body part, and a sheet extension part extending from the sheet side surface part. The sheet extension part is fixed to the electrode assembly.

公开(公告)号：US20210013478A1

公开(公告)日：2021-01-14

申请号：US16982734

申请日：2019-03-06

Applicant: GS Yuasa International Ltd.

Inventor： Shun SASAKI ,  Yoshimasa TOSHIOKA

IPC: H01M2/18 ,  H01M2/34 ,  H01M2/30

Abstract: An energy storage apparatus includes an energy storage device and a spacer disposed adjacent to the energy storage device in a first direction, in which the energy storage device has a case first surface on which an electrode terminal is disposed, a case second surface adjacent to the case first surface in a second direction intersecting the first direction, and a convex portion (gasket) protruding from the case first surface, and the spacer has a first protrusion that faces the convex portion in the second direction and protrudes along the convex portion without having a portion that faces the case second surface.

公开(公告)号：US10889187B2

公开(公告)日：2021-01-12

申请号：US16066240

申请日：2017-01-11

Applicant: GS Yuasa International Ltd.

Inventor： Yuki Nakanishi ,  Kazuhiro Sugie ,  Takeshi Chiba

IPC: B60L58/18 ,  B60L58/12 ,  B60K6/28 ,  B60R16/033 ,  B60L3/00

Abstract: A vehicle-mounted power supply system according to the present invention is provided with: a main battery; a sub-battery; a voltage regulating unit which regulates the voltage of power supplied from the main battery and the sub-battery; and a state detecting unit which detects the state of the sub-battery. The state detecting unit is provided with: a first calculating unit which calculates a first internal resistance on the basis of a drop in the voltage across the sub-battery and an inrush current when the sub-battery supplies power to a load; a second calculating unit which manipulates the voltage regulating unit immediately following the calculation of the first internal resistance, and subsequently at least one more time, to cause the sub-battery to be forcibly discharged, and calculates a second internal resistance on the basis of a relationship between the voltage across the sub-battery and the current flowing thereinto when forcibly discharged; and a state determining unit which determines the state of the sub-battery on the basis of the first internal resistance and changes in the second internal resistance.

公开(公告)号：US10833298B2

公开(公告)日：2020-11-10

申请号：US15760940

申请日：2016-09-16

Applicant: GS Yuasa International Ltd.

Inventor： Kenji Kawate ,  Takeshi Kawahara ,  Tomoko Nishikawa

IPC: H01M2/04 ,  H01M2/18 ,  H01M10/04 ,  H01M2/02 ,  H01M2/14 ,  H01G11/82 ,  H01G11/80 ,  H01G11/76 ,  H01M6/02 ,  H01M2/08 ,  H01M2/30 ,  H01M10/0525 ,  H01G11/78 ,  H01M10/052

Abstract: An energy storage device includes an electrode body in which an electrode is wound, a case that stores the electrode body, and spacers (side spacers) interposed between the case and the electrode body. The spacers each have an opening that exposes a portion of faces of curved portions of the electrode body from one end to the other end of the electrode body in a winding axis direction of the electrode body.