Patents by Inventor Kazuya Okabe
Kazuya Okabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250015469Abstract: A method for manufacturing an energy storage device according to one aspect of the present invention includes: degassing an inside of an element case in which an electrode assembly including a positive electrode and a negative electrode is housed and a plurality of electrolyte solution filling ports are provided on one surface; and injecting the electrolyte solution from one electrolyte solution filling case filled with the electrolyte solution into the inside of the degassed element case through the plurality of electrolyte solution filling ports.Type: ApplicationFiled: September 21, 2022Publication date: January 9, 2025Inventors: Kazuya OKABE, Ryoichi OKUYAMA
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Publication number: 20240429503Abstract: An energy storage device includes: an electrode assembly formed by winding a plurality of plates; and a rectangular parallelepiped case housing the electrode assembly. The case is constructed by welding: a lid formed of a pair of short side surfaces of the case, which face each other in a winding-axis direction, and an other one surface of the case; and a case body formed of three surfaces, except for the pair of short side surfaces and the other one surface, of the case.Type: ApplicationFiled: January 21, 2022Publication date: December 26, 2024Applicant: GS Yuasa International Ltd.Inventors: Ryoichi OKUYAMA, Kazuya OKABE
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Publication number: 20240405695Abstract: A power conversion device includes an inverter and a controller that controls the inverter. The inverter includes a first inverter circuit and a second inverter circuit that are connected in parallel to a power source. A first output terminal of a full-bridge inverter unit and a first terminal are connected to each other. A second output terminal of the full-bridge inverter unit and a second terminal are connected to each other. The second output terminal of the full-bridge inverter unit and the first output terminal of the full-bridge inverter unit are connected to each other at a connecting point. The connecting point and a neutral point terminal are connected to each other.Type: ApplicationFiled: May 1, 2024Publication date: December 5, 2024Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuya OKABE, Keiji YOSHIDA, Masahiro ICHIGO
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Publication number: 20240405697Abstract: A power conversion device includes an inverter, a state detector, a distribution board configured to distribute power output from the inverter such that single-phase three-wire alternating-current power is supplied to a first power supply port and single-phase two-wire alternating-current power is supplied to a second power supply port and a third power supply port, and processing circuitry configured to control the inverter and the distribution board. The processing circuitry is configured to determine whether there is an anomaly in one of a first inverter circuit and a second inverter circuit based on a detection result of the state detector, and when determining that there is an anomaly in one of the first inverter circuit and the second inverter circuit, stop the inverter circuit determined to have the anomaly and switch the first switch of the distribution board to an open state.Type: ApplicationFiled: May 10, 2024Publication date: December 5, 2024Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuya OKABE, Masato MORIKAWA, Masahiro ICHIGO, Takashi TAKEUCHI
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Publication number: 20240405696Abstract: A vehicle on-board power conversion device includes an inverter configured to convert power output from a power supply of a vehicle and processing circuitry configured to control the inverter. The inverter includes a first inverter circuit configured to convert power, output from the power supply, into single-phase two-wire alternating-current power and supply the single-phase two-wire alternating-current power to the one or more interior power supply ports, and a second inverter circuit configured to convert power, output from the power supply, into single-phase two-wire alternating-current power and supply the single-phase two-wire alternating-current power to the one or more exterior power supply ports. The processing circuitry is configured to determine whether the vehicle is traveling, and, when determining that the vehicle is traveling, stop or limit supply of power to at least one exterior power supply port of the one or more exterior power supply ports.Type: ApplicationFiled: May 10, 2024Publication date: December 5, 2024Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Kazuya OKABE, Masato MORIKAWA, Masahiro ICHIGO, Takashi TAKEUCHI
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Publication number: 20240097179Abstract: An energy storage device includes: an electrode assembly formed by winding a plurality of plates; and a case housing the electrode assembly. The electrode assembly includes: a body including a flat portion and a pair of curved portions sandwiching the flat portion; and a plurality of tabs, each tab formed by stacking a plurality of pieces of plates with the same polarity out of the plurality of plates, and protrude as a pair from each of both end faces of the body in a winding-axis direction. At least one tab of the plurality of tabs includes a bent portion continuous with the curved portion, and a pair of extended portions extended from the bent portion and continuous with the flat portion.Type: ApplicationFiled: January 25, 2022Publication date: March 21, 2024Applicant: GS Yuasa International Ltd.Inventors: Kazuya OKABE, Ryoichi OKUYAMA
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Publication number: 20240079632Abstract: An energy storage device includes a wound electrode assembly containing lithium manganese oxide as a main component in a positive active material, and a case that houses the wound electrode assembly. The wound electrode assembly includes a mixture layer forming portion in which a mixture layer is formed, and a mixture layer non-forming portion located at least at one end in a first direction parallel to a winding axis. In the wound electrode assembly, a ratio of a dimension in the first direction to a dimension in a second direction orthogonal to the first direction in plan view is 1.45 or more.Type: ApplicationFiled: November 10, 2021Publication date: March 7, 2024Inventors: Kazuya OKABE, Ryoichi OKUYAMA
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Publication number: 20240055700Abstract: An energy storage apparatus includes an energy storage unit including a first energy storage device and a second energy storage device that are arranged in a first direction. The first energy storage device includes a concave part in which a surface of the first energy device, the surface opposite to the second energy storage device is recessed. The energy storage unit further includes: a first adhesive body that is disposed in the concave part between the first energy storage device and the second energy storage device and adheres to the first energy storage device and the second energy storage device; and a spacer that is disposed between the first energy storage device and the second energy storage device at a position different from the first adhesive body in a second direction intersecting with the first direction.Type: ApplicationFiled: December 2, 2021Publication date: February 15, 2024Applicant: GS Yuasa International Ltd.Inventors: Kazuya OKABE, Ryoichi OKUYAMA
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Publication number: 20230402666Abstract: An abnormality detection method detects abnormality of an assembled battery including energy storage devices by an abnormality detection device. Each energy storage device contains, as a positive active material, lithium iron phosphate and lithium transition metal oxide that allows insertion and extraction reaction of a lithium ion in a potential range higher than that of the lithium iron phosphate. A ratio of an amount of charge based on a total amount of the lithium transition metal oxide to an amount of charge based on a total amount of the positive active material in a charge-discharge range, in which the energy storage device is used, is 5% or more. The abnormality detection device acquires voltage of each of the energy storage devices near a charge end point in the charge-discharge range where the energy storage device is used and detects abnormality in the assembled battery using the acquired voltage of the energy storage devices.Type: ApplicationFiled: September 28, 2021Publication date: December 14, 2023Inventors: Ryoichi OKUYAMA, Kazuya OKABE
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Patent number: 11509015Abstract: An energy storage module according to an aspect of the present invention includes: a plurality of energy storage devices each including a case; a glass paper sheet provided between the energy storage devices, brought into contact with the case, and mainly composed of a glass fiber; and a holding member holding the plurality of energy storage devices and the glass paper sheet, wherein the glass paper sheet is compressed between the energy storage devices.Type: GrantFiled: August 6, 2018Date of Patent: November 22, 2022Assignee: GS YUASA INTERNATIONAL LTD.Inventors: Yoshitaka Ishida, Hiroshi Mukai, Kazuya Okabe, Koichi Nishiyama
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Publication number: 20200235358Abstract: An energy storage module according to an aspect of the present invention includes: a plurality of energy storage devices each including a case; a glass paper sheet provided between the energy storage devices, brought into contact with the case, and mainly composed of a glass fiber; and a holding member holding the plurality of energy storage devices and the glass paper sheet, wherein the glass paper sheet is compressed between the energy storage devices.Type: ApplicationFiled: August 6, 2018Publication date: July 23, 2020Inventors: Yoshitaka ISHIDA, Hiroshi MUKAI, Kazuya OKABE, Koichi NISHIYAMA
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Patent number: 10141560Abstract: Provided is an energy storage device which includes an electrode assembly in which electrode plates are stacked; and a current collector connected to an end portion of the electrode assembly, wherein the end portion of the electrode assembly includes: an electrode plate welded portion at which the stacked electrode plates are welded to each other in a stacking direction and not joined to the current collector; and a current collector joined portion which is joined to the current collector and is arranged adjacently to the electrode plate welded portion in a current collector extending direction that intersects with the stacking direction.Type: GrantFiled: March 15, 2016Date of Patent: November 27, 2018Assignee: GS YUASA INTERNATIONAL LTD.Inventors: Kazuya Okabe, Yudai Kato
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Patent number: 9905838Abstract: An electrode includes: an electrode plate; a conductive layer formed on the electrode plate; and an active material layer formed continuously on the electrode plate and on the conductive layer, and the electrode plate includes an uncoated region where a surface of the electrode plate is exposed.Type: GrantFiled: August 2, 2012Date of Patent: February 27, 2018Assignee: GS YUASA INTERNATIONAL LTD.Inventors: Toshinori Bando, Yoshikatsu Ohtani, Kazuya Okabe
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Patent number: 9863818Abstract: A temperature detecting apparatus detects a temperature of a detection target having a switch element. The temperature detecting apparatus includes a current detecting unit and a temperature estimating unit. The current detecting unit detects an output current from the detection target changing depending on an on/off operation of the switch element. The temperature estimating unit, on the basis of a current value detected by the current detecting unit, calculates a conduction loss of the switch element and a switching loss of the switch element to estimate the temperature of the detection target on the basis of the calculated conduction loss and the calculated switching loss.Type: GrantFiled: December 9, 2014Date of Patent: January 9, 2018Assignee: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.Inventors: Tomohiro Tanabe, Kazuya Okabe, Daisuke Hagiwara
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Patent number: 9823278Abstract: A fault detecting apparatus, to use an output current from a drive circuit as a current value detected by a current sensor, calculates a duty ratio of a control signal to be supplied to the drive circuit to define the duty ratio as a theoretical value of the duty ratio of the control signal. The fault detecting apparatus compares a duty ratio of a control signal actually supplied to the drive circuit with the theoretical value of the duty ratio of the control signal to determine whether the current sensor (fails on the basis of a comparison result.Type: GrantFiled: December 9, 2014Date of Patent: November 21, 2017Assignee: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.Inventors: Tomohiro Tanabe, Kazuya Okabe, Daisuke Hagiwara
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Publication number: 20160276704Abstract: Provided is an energy storage device which includes an electrode assembly in which electrode plates are stacked; and a current collector connected to an end portion of the electrode assembly, wherein the end portion of the electrode assembly includes: an electrode plate welded portion at which the stacked electrode plates are welded to each other in a stacking direction and not joined to the current collector; and a current collector joined portion which is joined to the current collector and is arranged adjacently to the electrode plate welded portion in a current collector extending direction that intersects with the stacking direction.Type: ApplicationFiled: March 15, 2016Publication date: September 22, 2016Inventors: Kazuya OKABE, Yudai KATO
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Patent number: 9450236Abstract: An electricity-storing device includes a first electrode, a second electrode of opposite polarity as the first electrode, and a separator. The first electrode includes a current collector foil, an active material layer formed on at least one surface of the current collector foil, and an electrical resistance layer formed on the at least one surface of the current collector foil so as to be adjacent to and in direct contact with the active material layer, at least a portion of an interface between the active material layer and the electrical resistance layer including a mixed phase where constituents from the active material layer and the electrical resistance layer intermingle.Type: GrantFiled: January 16, 2015Date of Patent: September 20, 2016Assignee: GS Yuasa International Ltd.Inventors: Kenji Tanaka, Kazuaki Matsuo, Kazuhide Tozuka, Kazuya Okabe
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Patent number: 9099757Abstract: Provided is a battery which has less tendency to experience delamination or loss of short circuit prevention layer and/or active material layer during manufacture and use. A battery comprising a laminated electrode assembly in which a positive electrode, a negative electrode, and a separator are laminated together; wherein an alumina-containing layer containing ?-alumina particles is formed on at least one species selected from among the group consisting of the positive electrode, the negative electrode, and the separator. The fact that alumina-containing layer(s) is or are made to contain ?-alumina particles makes it possible to obtain high bond strength between alumina-containing layer(s) and electrode(s) comprising metal(s), current collector(s) and/or active material(s) making up electrode(s), and/or separator(s).Type: GrantFiled: September 2, 2011Date of Patent: August 4, 2015Assignee: GS Yuasa International Ltd.Inventors: Kenji Tanaka, Kazuaki Matsuo, Kazuhide Tozuka, Kazuya Okabe
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Publication number: 20150160074Abstract: A temperature detecting apparatus detects a temperature of a detection target having a switch element. The temperature detecting apparatus includes a current detecting unit and a temperature estimating unit. The current detecting unit detects an output current from the detection target changing depending on an on/off operation of the switch element. The temperature estimating unit, on the basis of a current value detected by the current detecting unit, calculates a conduction loss of the switch element and a switching loss of the switch element to estimate the temperature of the detection target on the basis of the calculated conduction loss and the calculated switching loss.Type: ApplicationFiled: December 9, 2014Publication date: June 11, 2015Applicant: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.Inventors: Tomohiro TANABE, Kazuya OKABE, Daisuke HAGIWARA
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Publication number: 20150160324Abstract: A fault detecting apparatus, to use an output current from a drive circuit as a current value detected by a current sensor, calculates a duty ratio of a control signal to be supplied to the drive circuit to define the duty ratio as a theoretical value of the duty ratio of the control signal. The fault detecting apparatus compares a duty ratio of a control signal actually supplied to the drive circuit with the theoretical value of the duty ratio of the control signal to determine whether the current sensor (fails on the basis of a comparison result.Type: ApplicationFiled: December 9, 2014Publication date: June 11, 2015Applicant: SHINDENGEN ELECTRIC MANUFACTURING CO., LTD.Inventors: Tomohiro TANABE, Kazuya OKABE, Daisuke HAGIWARA