Patents by Inventor Kunio Tsuruta
Kunio Tsuruta 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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Patent number: 11749842Abstract: A cell of an energy storage device with at least one electrode that is tabless, and methods of forming thereof, are described. The cell includes a first substrate having a first coating disposed thereon, wherein a second portion of the first substrate at a proximal end along the width of the first substrate comprises a conductive material. An inner separator is disposed over the first substrate. A second substrate is disposed over the inner separator. The second substrate has a second coating disposed thereon. The first substrate, the inner separator, and the second substrate in a successive manner, the first substrate, the inner separator, and the second substrate are rolled about a central axis.Type: GrantFiled: November 4, 2019Date of Patent: September 5, 2023Assignee: Tesla, Inc.Inventors: Kunio Tsuruta, Mikel Ehrlich Dermer, Rajeev Dhiman
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Publication number: 20230155183Abstract: A cell of an energy storage device with at least one electrode that is tables, and methods of forming thereof, are described. The cell includes a first substrate having a first coating disposed thereon, wherein a second portion of the first substrate at a proximal end along the width of the first substrate comprises a conductive material. An inner separator is disposed over the first substrate. A second substrate is disposed over the inner separator. The second substrate has a second coating disposed thereon. The first substrate, the inner separator, and the second substrate in a successive manner, the first substrate, the inner separator, and the second substrate are rolled about a central axis.Type: ApplicationFiled: January 13, 2023Publication date: May 18, 2023Inventors: Kunio Tsuruta, Mikel Ehrlich Dermer, Rajeev Dhiman
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Patent number: 11588184Abstract: A cell of an energy storage device with at least one electrode that is tabless, and methods of forming thereof, are described. The cell includes a first substrate having a first coating disposed thereon, wherein a second portion of the first substrate at a proximal end along the width of the first substrate comprises a conductive material. An inner separator is disposed over the first substrate. A second substrate is disposed over the inner separator. The second substrate has a second coating disposed thereon. The first substrate, the inner separator, and the second substrate in a successive manner, the first substrate, the inner separator, and the second substrate are rolled about a central axis.Type: GrantFiled: November 4, 2019Date of Patent: February 21, 2023Assignee: Tesla, Inc.Inventors: Kunio Tsuruta, Mikel Ehrlich Dermer, Rajeev Dhiman
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Patent number: 10673033Abstract: An electrochemical cell includes a can configured to serve as one electric contact of the electrochemical cell, the can containing active materials, a diaphragm configured to serve as an opposite electric contact of the electrochemical cell, and a gasket that is initially of generally cylindrical shape, the diaphragm positioned inside the gasket in an opening of the can wherein an outer edge of the can is crimped onto the gasket, the gasket having an inner periphery inside the can and an outer periphery outside the can, the outer periphery comprising leaves that after crimping extend along an outer surface of the diaphragm.Type: GrantFiled: August 23, 2016Date of Patent: June 2, 2020Assignee: Tesla, Inc.Inventors: Christophe Mille, Kunio Tsuruta, Kenjin Masumoto
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Publication number: 20200144676Abstract: A cell of an energy storage device with at least one electrode that is tabless, and methods of forming thereof, are described. The cell includes a first substrate having a first coating disposed thereon, wherein a second portion of the first substrate at a proximal end along the width of the first substrate comprises a conductive material. An inner separator is disposed over the first substrate. A second substrate is disposed over the inner separator. The second substrate has a second coating disposed thereon. The first substrate, the inner separator, and the second substrate in a successive manner, the first substrate, the inner separator, and the second substrate are rolled about a central axis.Type: ApplicationFiled: November 4, 2019Publication date: May 7, 2020Inventors: Kunio Tsuruta, Mikel Ehrlich Dermer, Rajeev Dhiman
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Patent number: 10541413Abstract: A method of manufacturing a cathode material for a lithium ion cell comprises: generating a lithium nickel composite oxide material in a manufacturing process, wherein the manufacturing process results in residual lithium being present in the lithium nickel composite oxide material; washing the lithium nickel composite oxide material to remove at least part of the residual lithium, wherein the washing provides the lithium nickel composite oxide material with a moisture content; and drying the lithium nickel composite oxide material to remove at least part of the moisture content, the drying performed in an environment of substantially only an inert gas or air essentially free of carbon dioxide.Type: GrantFiled: April 11, 2016Date of Patent: January 21, 2020Assignee: Tesla, Inc.Inventors: Shinji Arimoto, Kunio Tsuruta, Rene Leblanc, Ryan Melsert
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Patent number: 10018681Abstract: A method of manufacturing cells includes: assembling cells that include at least electrodes and electrolyte contained in a housing; after assembly, storing the cells in contact with a liquid-based thermal system; circulating liquid in the liquid-based thermal system at least while the cells are in contact with the liquid-based thermal system, the liquid having a first temperature; after storing the cells at the first temperature, and while the cells have at least a partial charge, performing a first open circuit voltage (OCV) test on the cells; after the first OCV test, storing the cells at a second temperature lower than the first temperature; after storing the cells at the second temperature, performing a second OCV test on the cells; and for each of the cells, discarding or keeping the cell based at least in part on the first and second OCV tests.Type: GrantFiled: January 21, 2016Date of Patent: July 10, 2018Assignee: TESLA, INC.Inventor: Kunio Tsuruta
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Publication number: 20170294652Abstract: A method of manufacturing a cathode material for a lithium ion cell comprises: generating a lithium nickel composite oxide material in a manufacturing process, wherein the manufacturing process results in residual lithium being present in the lithium nickel composite oxide material; washing the lithium nickel composite oxide material to remove at least part of the residual lithium, wherein the washing provides the lithium nickel composite oxide material with a moisture content; and drying the lithium nickel composite oxide material to remove at least part of the moisture content, the drying performed in an environment of substantially only an inert gas or air essentially free of carbon dioxide.Type: ApplicationFiled: April 11, 2016Publication date: October 12, 2017Inventors: Shinji ARIMOTO, Kunio TSURUTA, Rene LEBLANC, Ryan MELSERT
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Patent number: 9692038Abstract: An electrochemical cell includes: a cell can; electrolyte and an active-material roll in the cell can; and a cap that closes at least one opening of the cell can, the cap comprising: a substantially flat member that covers the opening, the substantially flat member having a separation portion defined therein; and a diaphragm that covers the separation portion on an inside of the substantially flat member.Type: GrantFiled: November 24, 2014Date of Patent: June 27, 2017Assignee: TESLA, INC.Inventors: Kunio Tsuruta, Kenjin Masumoto
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Publication number: 20170062778Abstract: An electrochemical cell includes a can configured to serve as one electric contact of the electrochemical cell, the can containing active materials, a diaphragm configured to serve as an opposite electric contact of the electrochemical cell, and a gasket that is initially of generally cylindrical shape, the diaphragm positioned inside the gasket in an opening of the can wherein an outer edge of the can is crimped onto the gasket, the gasket having an inner periphery inside the can and an outer periphery outside the can, the outer periphery comprising leaves that after crimping extend along an outer surface of the diaphragm.Type: ApplicationFiled: August 23, 2016Publication date: March 2, 2017Applicant: Tesla Motors, Inc.Inventors: Christophe Mille, Kunio Tsuruta, Kenjin Masumoto
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Publication number: 20160233559Abstract: A method of manufacturing cells includes: assembling cells that include at least electrodes and electrolyte contained in a housing; after assembly, storing the cells in contact with a liquid-based thermal system; circulating liquid in the liquid-based thermal system at least while the cells are in contact with the liquid-based thermal system, the liquid having a first temperature; after storing the cells at the first temperature, and while the cells have at least a partial charge, performing a first open circuit voltage (OCV) test on the cells; after the first OCV test, storing the cells at a second temperature lower than the first temperature; after storing the cells at the second temperature, performing a second OCV test on the cells; and for each of the cells, discarding or keeping the cell based at least in part on the first and second OCV tests.Type: ApplicationFiled: January 21, 2016Publication date: August 11, 2016Inventor: Kunio Tsuruta
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Publication number: 20150147600Abstract: An electrochemical cell includes: a cell can; electrolyte and an active-material roll in the cell can; and a cap that closes at least one opening of the cell can, the cap comprising: a substantially flat member that covers the opening, the substantially flat member having a separation portion defined therein; and a diaphragm that covers the separation portion on an inside of the substantially flat member.Type: ApplicationFiled: November 24, 2014Publication date: May 28, 2015Inventors: Kunio TSURUTA, Kenjin Masumoto
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Patent number: 6861821Abstract: A battery and a battery pack comprising a rechargeable battery (2) and a circuit substrate (3) integrated therein by a resin mold package (11) are provided. Resin is filled between the rechargeable battery (2) and the substrate (3) electrically connected thereto, so as to unite them as one battery or battery pack. The rechargeable battery (2) includes an engaging member (26) which functions as an anchor to the resin mold package (11) formed onto the battery, whereby the resin mold package (11) is firmly joined to the rechargeable battery (2). A thermo-sensitive element can be incorporated either on the circuit substrate (3) or within the space filled with resin.Type: GrantFiled: June 27, 2002Date of Patent: March 1, 2005Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kenjin Masumoto, Katsumi Kozu, Kunio Tsuruta
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Publication number: 20040170887Abstract: The open end of a battery case (1) that houses an electrode assembly (14) is sealed with a sealing plate (3), the top of the sealing plate (3) is closed off with an insulating plate (11), and inside a concave section formed in the sealing plate (3), a positive electrode lead (12) that extends from a positive electrode plate of the electrode assembly (14) is connected in series to a thermal fuse (8) and a PTC element (9) and then to a positive electrode terminal (+). A two fold safety function is provided so that in the case of an external short-circuit across the positive and negative electrodes, excessive current is regulated by a rapid increase in the resistance of the PTC element (9) accompanying the temperature increase, whereas if a temperature increase occurs that cannot be regulated in this manner, the thermal fuse (8) fuses, breaking the circuit.Type: ApplicationFiled: February 6, 2004Publication date: September 2, 2004Inventors: Kenjin Masumoto, Shinji Murashige, Hajime Konishi, Kunio Tsuruta, Hiroshi Yoshizawa, Masaaki Kaneda, Koji Saito, Satoshi Kataoka
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Patent number: 6682857Abstract: The non-aqueous electrolyte-containing secondary battery of the present invention uses a non-aqueous electrolyte including at least one phosphoric ester derivative expressed by Formula (1): (R1aO)(R2aO)P(O)X and by Formula (2): R(1bO)P(O)X2, wherein R1a, R2a, and R1b independently denote aliphatic hydrocarbon groups having 1 to 12 carbon atoms and X denotes a halogen atom. This arrangement improves the high-temperature storage characteristics after charging and the charge-discharge cycle characteristics of the secondary battery.Type: GrantFiled: October 29, 2001Date of Patent: January 27, 2004Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hideharu Takezawa, Shoichiro Watanabe, Shusaku Goto, Kunio Tsuruta
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Publication number: 20030180582Abstract: A battery and a battery pack comprising a rechargeable battery (2) and a circuit substrate (3) integrated therein by a resin mold package (11) are provided.Type: ApplicationFiled: February 19, 2003Publication date: September 25, 2003Inventors: Kenjin Masumoto, Katsumi Kozu, Kunio Tsuruta
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Nonaqueous electrolyte secondary battery and method for manufacturing negative electrode of the same
Patent number: 6455199Abstract: Graphite powder for a negative electrode in prior arts, which allows lithium ions to repeat intercalation and deintercalation reversibly by charge and discharge, has failed to attain a specific capacity close to the theoretical capacity of 372 mAh per 1 g. Also, there was a problem in storage property at a high temperature when it is attempted to improve the high rate charge and discharge characteristics. An object of the present invention is to solve these problems. In the process of pulverizing flaky graphite particles of which plane interval (d002) of (002) plane is 3.350 to 3.Type: GrantFiled: February 22, 1999Date of Patent: September 24, 2002Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masaki Kitagawa, Yoshihiro Kashihara, Hizuru Koshina, Toyoji Sugimoto, Kunio Tsuruta, Shuji Ito, Hajime Nishino, Kojiro Ishikawa, Hisanori Sugimoto, Kaoru Tsukamoto -
Publication number: 20020081497Abstract: The non-aqueous electrolyte-containing secondary battery of the present invention uses a non-aqueous electrolyte including at least one phosphoric ester derivative expressed by Formula (1): (R1aO)(R2aO)P(O)X and by Formula (2): R(1bO)P(O)X2, wherein R1a, R2a, and R1b independently denote aliphatic hydrocarbon groups having 1 to 12 carbon atoms and X denotes a halogen atom. This arrangement improves the high-temperature storage characteristics after charging and the charge-discharge cycle characteristics of the secondary battery.Type: ApplicationFiled: October 29, 2001Publication date: June 27, 2002Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTDInventors: Hideharu Takezawa, Shoichiro Watanabe, Shusaku Goto, Kunio Tsuruta
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Patent number: 6258477Abstract: An explosion-proof non-aqueous electrolyte battery is provided which has a current cutoff device for cutting off electrical connection within the battery with safety and certainty in the event of overcharge while remaining inoperable in normal use or in storage at an elevated temperature. A pair of an upper vent plate 1 and a lower vent plate 2 mechanically and electrically coupled with each other is provided on the sealing part of-the battery where the mechanical coupling of the pair of the upper vent plate 1 and the lower vent plate 2 is so configured as to rupture and cut off an electric current in the event the internal pressure of the battery case increases beyond a predetermined value, and the rupture pressure at which the mechanical coupling between the pair of upper vent plate 1 and the lower vent plate 2 is broken has been set to decrease as the spatial volume occupancy ratio of the battery increases.Type: GrantFiled: September 9, 1999Date of Patent: July 10, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiro Kashihara, Katsuhiko Mori, Kenjin Masumoto, Kunio Tsuruta
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Patent number: 5916628Abstract: A cell that is excellent in discharge characteristics and cycle characteristics is provided by filtering an active material paste, which contains an active material, a binder resin solution, and a conducting agent added as required, at least one time by a filter while stirring the active material paste in a stirring apparatus that has a stirring blade, and then coating a current collector with the active material paste. An active material paste is circulated and filtered by a feeding pump and a filter while being stirred in a stirring apparatus that has a stirring blade. Then, the active material paste is fed to another filter by a metering pump and filtered, and then, a current collector (backing) is coated with the active material paste. Then, the active material paste is dried in a dry zone and taken up by a take-up roller.Type: GrantFiled: November 26, 1996Date of Patent: June 29, 1999Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yasuhiro Ueyama, Kunio Tsuruta, Yorihito Ohana, Toshikazu Nakamura