Patents by Inventor Shigetaka Nagamatsu

Shigetaka Nagamatsu 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).

  • Patent number: 11302953
    Abstract: A main object of the present disclosure is to provide a stacked battery in which an unevenness of short circuit resistance among a plurality of cells is suppressed. The present disclosure achieves the object by providing a stacked battery comprising: a plurality of cells in a thickness direction, wherein the plurality of cells are electrically connected in parallel; each of the plurality of cells includes a cathode current collector, a cathode active material layer, a solid electrolyte layer, an anode active material layer, and an anode current collector, in this order; the stacked battery includes a surface-side cell that is located on a surface side of the stacked battery, and a center-side cell that is located on a center side rather than the surface-side cell; and a contact resistance between the cathode current collector and the anode current collector in the surface-side cell is more than a contact resistance between the cathode current collector and the anode current collector in the center-side cell.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: April 12, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hajime Hasegawa, Yuki Matsushita, Hideaki Nishimura, Yusuke Okuhata, Norihiro Ose, Mitsuru Tateishi, Shigetaka Nagamatsu, Takayuki Uchiyama, Shigenori Hama, Dai Kato, Naohiro Mashimo, Hideyo Ebisuzaki, Ayano Kobayashi, Hisataka Fujimaki
  • Publication number: 20220021000
    Abstract: Provided is a sulfide all-solid battery having an anode current collector of powerful adhesiveness which is difficult to be sulfurized. The sulfide all-solid-state battery including: a cathode layer; an anode layer; and a sulfide solid electrolyte layer disposed between the cathode layer and the anode layer, wherein the anode layer has an anode mixture layer, and an anode current collector on a face of the anode mixture layer, the face being on an opposite side of the sulfide solid electrolyte layer, the anode current collector is electrolytic iron foil that does not substantially contain other elements, and the anode current collector has surface roughness Ra of 0.2 ?m to 0.6 ?m, and surface roughness Rz of 2 ?m to 6 ?m.
    Type: Application
    Filed: July 14, 2021
    Publication date: January 20, 2022
    Applicants: Toyota Jidosha Kabushiki Kaisha, Toyo Kohan Co., Ltd.
    Inventors: Hajime Hasegawa, Shigetaka Nagamatsu, Shinichirou Horie, Koh Yoshioka, Toshifumi Koyanagi, Etsuro Tsutsumi, Michio Kawamura, Yuma Yoshizaki
  • Patent number: 11075409
    Abstract: A main object of the present disclosure is to provide a stacked battery in which the unevenness of short circuit resistance among a plurality of cells is suppressed.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: July 27, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hajime Hasegawa, Yuki Matsushita, Hideaki Nishimura, Yusuke Okuhata, Norihiro Ose, Mitsuru Tateishi, Shigetaka Nagamatsu, Takayuki Uchiyama, Shigenori Hama, Dai Kato, Naohiro Mashimo, Hideyo Ebisuzaki, Ayano Kobayashi, Hisataka Fujimaki
  • Patent number: 10910677
    Abstract: An objective of the present disclosure is to provide a stacked battery that suppresses sneak current caused by an unevenness of a short circuit resistance among a plurality of cells. The present disclosure provides a stacked battery comprising: a plurality of cells in a thickness direction, wherein the plurality of cells are electrically connected in parallel; the stacked battery includes a surface-side cell that is located on a surface side of the stacked battery, and a center-side cell that is located on a center side rather than the surface-side cell; wherein a resistance of the cathode current collecting tab in the surface-side cell is more than a resistance of the cathode current collecting tab in the center-side cell; or a resistance of the anode current collecting tab in the surface-side cell is more than a resistance of the anode current collecting tab in the center-side cell.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: February 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hajime Hasegawa, Yuki Matsushita, Hideaki Nishimura, Yusuke Okuhata, Norihiro Ose, Mitsuru Tateishi, Shigetaka Nagamatsu, Takayuki Uchiyama, Shigenori Hama, Dai Kato, Naohiro Mashimo, Hideyo Ebisuzaki, Ayano Kobayashi, Hisataka Fujimaki
  • Patent number: 10559845
    Abstract: A main object of the present disclosure is to provide a stacked battery in which an unevenness of short circuit resistance among a plurality of cells is suppressed.
    Type: Grant
    Filed: April 13, 2018
    Date of Patent: February 11, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hajime Hasegawa, Yuki Matsushita, Hideaki Nishimura, Yusuke Okuhata, Norihiro Ose, Mitsuru Tateishi, Shigetaka Nagamatsu, Takayuki Uchiyama, Shigenori Hama, Dai Kato, Naohiro Mashimo, Hideyo Ebisuzaki, Ayano Kobayashi, Hisataka Fujimaki
  • Publication number: 20180316065
    Abstract: A main object of the present disclosure is to provide a stacked battery in which sneak current caused by an unevenness of a short circuit resistance among a plurality of cells, is suppressed.
    Type: Application
    Filed: April 13, 2018
    Publication date: November 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hajime HASEGAWA, Yuki MATSUSHITA, Hideaki NISHIMURA, Yusuke OKUHATA, Norihiro OSE, Mitsuru TATEISHI, Shigetaka NAGAMATSU, Takayuki UCHIYAMA, Shigenori HAMA, Dai KATO, Naohiro MASHIMO, Hideyo EBISUZAKI, Ayano KOBAYASHI, Hisataka FUJIMAKI
  • Publication number: 20180316066
    Abstract: A main object of the present disclosure is to provide a stacked battery in which the unevenness of short circuit resistance among a plurality of cells is suppressed.
    Type: Application
    Filed: April 13, 2018
    Publication date: November 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hajime HASEGAWA, Yuki MATSUSHITA, Hideaki NISHIMURA, Yusuke OKUHATA, Norihiro OSE, Mitsuru TATEISHI, Shigetaka NAGAMATSU, Takayuki UCHIYAMA, Shigenori HAMA, Dai KATO, Naohiro MASHIMO, Hideyo EBISUZAKI, Ayano KOBAYASHI, Hisataka FUJIMAKI
  • Publication number: 20180316049
    Abstract: A main object of the present disclosure is to provide a stacked battery in which an unevenness of short circuit resistance among a plurality of cells is suppressed. The present disclosure achieves the object by providing a stacked battery comprising: a plurality of cells in a thickness direction, wherein the plurality of cells are electrically connected in parallel; each of the plurality of cells includes a cathode current collector, a cathode active material layer, a solid electrolyte layer, an anode active material layer, and an anode current collector, in this order; the stacked battery includes a surface-side cell that is located on a surface side of the stacked battery, and a center-side cell that is located on a center side rather than the surface-side cell; and a contact resistance between the cathode current collector and the anode current collector in the surface-side cell is more than a contact resistance between the cathode current collector and the anode current collector in the center-side cell.
    Type: Application
    Filed: April 13, 2018
    Publication date: November 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hajime HASEGAWA, Yuki MATSUSHITA, Hideaki NISHIMURA, Yusuke OKUHATA, Norihiro OSE, Mitsuru TATEISHI, Shigetaka NAGAMATSU, Takayuki UCHIYAMA, Shigenori HAMA, Dai KATO, Naohiro MASHIMO, Hideyo EBISUZAKI, Ayano KOBAYASHI, Hisataka FUJIMAKI
  • Publication number: 20180316048
    Abstract: A main object of the present disclosure is to provide a stacked battery in which an unevenness of short circuit resistance among a plurality of cells is suppressed.
    Type: Application
    Filed: April 13, 2018
    Publication date: November 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hajime HASEGAWA, Yuki MATSUSHITA, Hideaki NISHIMURA, Yusuke OKUHATA, Norihiro OSE, Mitsuru TATEISHI, Shigetaka NAGAMATSU, Takayuki UCHIYAMA, Shigenori HAMA, Dai KATO, Naohiro MASHIMO, Hideyo EBISUZAKI, Ayano KOBAYASHI, Hisataka FUJIMAKI
  • Patent number: 10084161
    Abstract: A battery includes an electrode body having a positive electrode and a negative electrode and also includes an exterior case for receiving the electrode body. An insulation film for isolating the exterior case and the electrode body from each other is placed between an inner wall surface of the exterior case and the electrode body. The insulation film has a bag-like shape in which the electrode body is inserted. The bag-like insulation film has a gap filling section on its surface facing a side surface of the electrode body, and the gap filling section closes a gap between the electrode body and the inner wall surface of the exterior case.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: September 25, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigetaka Nagamatsu, Takayuki Tanahashi, Hiroyuki Tanaka
  • Patent number: 8828600
    Abstract: The present disclosure provides a battery, which includes a case having through holes, electric terminals projecting outward from the case and fixed to the holes, and insulating members interposed between the case and the terminals. A flanged portion standing out from the case, located around the hole is formed, a reinforcing member is fitted to the outer periphery of the flanged portion that reinforces against the outward force applied to the flanged portion, and the terminal and the insulating member are inserted into the flanged portion, and then the flanged portion is press-fitted from the outside of the case for fixing the terminal to the hole. The battery may have a high sealing property at the fitted portion among the case and the terminal.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: September 9, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroyasu Kado, Shigeru Takashiro, Shigetaka Nagamatsu, Keigo Yamada, Kaori Ueda, Takahiro Oshima
  • Patent number: 8211567
    Abstract: A sealed battery includes: a battery container having in at least an end portion thereof an opening portion, and a container folded-back portion formed in a peripheral edge of the opening portion; a lid having in its outer periphery a lid folded-back portion, and being attached to the opening portion of the battery container; a junction portion in which the container folded-back portion and the lid folded-back portion are integrally joined by a double-rolled seam method; a first seal member closing a first gap between a distal end portion of the container folded-back portion clamping a distal end portion of the lid folded-back portion and an inside of a folded curve portion of the lid folded-back portion; and a second seal member closing a second gap between the distal end portion of the lid folded-back portion and an inside of a folded curve portion of the container folded-back portion.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: July 3, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideki Hori, Shigetaka Nagamatsu
  • Publication number: 20120115022
    Abstract: The present invention provides a step (S1) for manufacturing a battery (10), which includes a case (30) having through holes (33), electric terminals (40) projecting outward from the case (30) and fixed to the holes (33), and insulating members (50) interposed between the case (30) and the terminals (40). In the step (S1), a flanged portion (34) standing out from the case (30), located around the hole (33) is formed, a reinforcing member (35) is fitted to the outer periphery of the flanged portion (34) that reinforces against the outward force applied to the flanged portion (34), and the terminal (40) and the insulating member (50) are inserted into the flanged portion (34), and then the flanged portion (34) is press-fitted from the outside of the case (30) for fixing the terminal (40) to the hole (33). According to the present invention, the battery with high sealing property at the fitted portion among the case and the terminal.
    Type: Application
    Filed: July 24, 2009
    Publication date: May 10, 2012
    Inventors: Hiroyasu Kado, Shigeru Takashiro, Shigetaka Nagamatsu, Keigo Yamada, Kaori Ueda, Takahiro Oshima
  • Patent number: 8142317
    Abstract: A drive unit includes an input shaft connected to an engine, a power conversion unit including rotating electric machines and planetary gears to convert power applied from the input shaft, and gears as the power output unit transmitting power output from the power conversion unit to a drive shaft of the vehicle. Planetary gears of the power conversion unit are formed separately from the gears. The rotating electric machines of the power conversion unit are stored in a unitary case.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: March 27, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Shigetaka Nagamatsu
  • Publication number: 20110274828
    Abstract: An electrode manufacturing apparatus (100) is provided with an unwinding unit (10), a first oven end unit (20), a drying oven (30), a second oven end unit (80), and a winding unit (90). The first oven end unit (20) is provided with a first coating unit (27) that coats a first side of an electrode foil (2) and a second coating unit (28) that coats a second side of the electrode foil (2). The electrode manufacturing apparatus (100) is further provided with turn-back roller pairs (25), (26), (85), (86) that invert an advancement direction of the electrode foil and displace a width direction position of the electrode foil by turning the electrode foil back at an angle. As a result, the coated electrode foil (2) reciprocates through the interior of the drying oven (30) at least one and a half times.
    Type: Application
    Filed: February 8, 2010
    Publication date: November 10, 2011
    Inventor: Shigetaka Nagamatsu
  • Publication number: 20100209750
    Abstract: A battery includes an electrode body having a positive electrode and a negative electrode and also includes an exterior case for receiving the electrode body. An insulation film for isolating the exterior case and the electrode body from each other is placed between an inner wall surface of the exterior case and the electrode body. The insulation film has a bag-like shape in which the electrode body is inserted. The bag-like insulation film has a gap filling section on its surface facing a side surface of the electrode body, and the gap filling section closes a gap between the electrode body and the inner wall surface of the exterior case.
    Type: Application
    Filed: August 12, 2008
    Publication date: August 19, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shigetaka Nagamatsu, Takayuki Tanahashi, Hiroyuki Tanaka
  • Publication number: 20100041502
    Abstract: A drive unit includes an input shaft connected to an engine, a power conversion unit including rotating electric machines and planetary gears to convert power applied from the input shaft, and gears as the power output unit transmitting power output from the power conversion unit to a drive shaft of the vehicle. Planetary gears of the power conversion unit are formed separately from the gears. The rotating electric machines of the power conversion unit are stored in a unitary case.
    Type: Application
    Filed: April 10, 2006
    Publication date: February 18, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Shigetaka Nagamatsu
  • Publication number: 20090142660
    Abstract: A sealed battery includes: a battery container having in at least an end portion thereof an opening portion, and a container folded-back portion formed in a peripheral edge of the opening portion; a lid having in its outer periphery a lid folded-back portion, and being attached to the opening portion of the battery container; a junction portion in which the container folded-back portion and the lid folded-back portion are integrally joined by a double-rolled seam method; a first seal member closing a first gap between a distal end portion of the container folded-back portion clamping a distal end portion of the lid folded-back portion and an inside of a folded curve portion of the lid folded-back portion; and a second seal member closing a second gap between the distal end portion of the lid folded-back portion and an inside of a folded curve portion of the container folded-back portion.
    Type: Application
    Filed: November 24, 2008
    Publication date: June 4, 2009
    Inventors: Hideki HORI, Shigetaka Nagamatsu
  • Patent number: 6656082
    Abstract: In a hybrid vehicle of the present invention, a clutch motor, an assist motor, and an engine are connected via a dual clutch, which includes an inner clutch arranged between an inner shaft and a middle shaft and an outer clutch arranged between the middle shaft and an outer shaft. An inner rotor of the clutch motor and the engine are linked with the inner shaft. The assist motor is linked with the middle shaft. An outer rotor of the clutch motor and an axle are linked with the outer shaft. Changing the coupling state of the middle shaft changes over the connection of the assist motor between the engine and the clutch motor. The connection of the assist motor with the clutch motor in the state of underdrive or in the case of a requirement of abrupt acceleration desirably improves the driving efficiency and ensures the smooth acceleration.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: December 2, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshinori Yamada, Shigetaka Nagamatsu
  • Patent number: 6359359
    Abstract: A rotor piece has a plurality of holes 12. Each hole holds therein a plurality of substantially divided permanent magnets 14 that are arranged in a circumferential direction. Therefore, each permanent magnet is small and the flow passage of eddy currents becomes narrow, so that the magnitude of eddy currents becomes small. The total eddy currents in all the permanent magnets is also reduced, so that the eddy current loss can be reduced and the heat generation of the motor can be reduced. Adjacent ones of the substantially divided permanent magnets may be interconnected at portions thereof. One or more of the substantially divided permanent magnets 14 in one or more holes may be ferrite magnets, with other permanent magnets being rare-earth magnets.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: March 19, 2002
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuya Miura, Masaru Hirako, Shigetaka Nagamatsu, Yasutomo Kawabata, Tetsuya Sugimoto