Patents by Inventor Hirokuni Akiyama

Hirokuni Akiyama 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: 9711768
    Abstract: An electricity storage device includes an electrode assembly, a case, a safety valve, and a cover member. The case accommodates the electrode assembly. The safety valve is arranged in the case and opens to discharge gas out of the case when an inner pressure of the case exceeds a release pressure. The cover member is arranged in the case opposing the safety valve and includes a flow passage for the gas.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: July 18, 2017
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Shimpei Mune, Motoaki Okuda, Yushi Kondo, Hirokuni Akiyama, Hiroyasu Nishihara, Atsushi Minagata
  • Patent number: 9577246
    Abstract: Provided is a negative electrode active material containing SiOx and carbonaceous particles containing graphite and having both good discharge capacity and good electric conductivity. Also provided is a negative electrode using the negative electrode active material and a nonaqueous electrolyte secondary battery. When the carbonaceous particles have an average particle diameter D50 of ? (?m) and a BET specific surface area of ? (m2/g), the ? and the ? satisfy the following Formulae (1) and (2). ???(12/18)?+12??(1) 5???15??(2).
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: February 21, 2017
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Megumi Yamamoto, Hideaki Shinoda, Hirokuni Akiyama, Manabu Miyoshi
  • Publication number: 20160190657
    Abstract: A current interruption device includes a deforming plate, a contact plate and a conducting plate which configure a current path. The deforming plate includes one surface on an opposite side from the contact plate facing a first space, a pressure of which is retained to a same pressure as the internal pressure of the casing and the other surface opposed to the contact plate facing a second space, a pressure of which is retained to a same pressure as an external pressure of the casing. When the internal pressure rises above the predetermined level, the second contact portion is separated from the conducting plate by deformation of the deforming plate toward the contacting plate.
    Type: Application
    Filed: April 3, 2014
    Publication date: June 30, 2016
    Applicants: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI, EAGLE INDUSTRY CO., LTD.
    Inventors: Takayuki HIROSE, Hirokuni AKIYAMA, Motoaki OKUDA, Atsushi MINAGATA, Hiroyasu NISHIHARA, Shimpei MUNE, Toshiaki IWA, Yoshihiro OGAWA, Makoto MITSUYASU, Norimitsu AKIYOSHI
  • Publication number: 20150357622
    Abstract: A lithium ion secondary battery (100) includes a case (10), an electrode assembly (20), a first metal plate (12), a second metal plate (14), and an insulating member (16). The electrode assembly (20) includes a positive electrode (30), a negative electrode (40), and a separator (50). The first metal plate (12) is electrically connected to the positive electrode (30). The second metal plate (14) is electrically connected to the negative electrode (40). The first metal plate (12) is thicker than a positive electrode metal foil (30B). The second metal plate (14) is thicker than a negative electrode metal foil (40B). When the thickness of the first metal plate (12) is designated as D1, and the thickness of the second metal plate (14) is designated as D2, the relationship: 1<D1/D2<2 is satisfied.
    Type: Application
    Filed: January 20, 2014
    Publication date: December 10, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Shimpei MUNE, Yushi KONDO, Motoaki OKUDA, Hirokuni AKIYAMA
  • Publication number: 20150318526
    Abstract: An electricity storage device includes an electrode assembly, a case, a safety valve, and a cover member. The case accommodates the electrode assembly. The safety valve is arranged in the case and opens to discharge gas out of the case when an inner pressure of the case exceeds a release pressure. The cover member is arranged in the case opposing the safety valve and includes a flow passage for the gas.
    Type: Application
    Filed: November 19, 2013
    Publication date: November 5, 2015
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Shimpei MUNE, Motoaki OKUDA, Yushi KONDO, Hirokuni AKIYAMA, Hiroyasu NISHIHARA, Atsushi MINAGATA
  • Publication number: 20150079432
    Abstract: A current interruption device includes: a deforming plate configured to deform when the internal pressure of the casing rises above the predetermined level; a conducting plate which configures the current path; and a contact plate. The conducting plate includes a first contact portion configured to contact the contact plate. The contact plate includes a second contact portion configured to contact the first contact portion. The deforming plate includes a pressure receiving portion configured to receive the internal pressure of the casing and a contacting portion configured to contact the first contact portion. The second contact portion is configured to be separated from the conducting plate by deformation causing the contacting portion to move toward the contact plate. The deforming plate is insulated from the conducting plate and the contact plate. The conducting plate is disposed to be interleaved between the deforming plate and the contact plate.
    Type: Application
    Filed: April 11, 2013
    Publication date: March 19, 2015
    Applicants: Eagle Industry Co., Ltd., KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Motoaki Okuda, Satoshi Umemura, Takayuki Kato, Hiroyasu Nishihara, Atsushi Minagata, Hirokuni Akiyama, Toshio Odagiri, Takayuki Hirose, Yoshihiro Ogawa, Toshiaki Iwa
  • Publication number: 20150037633
    Abstract: A battery pack includes a case and a battery module including secondary cells. Each secondary cell includes a primary surface and a secondary surface. The primary surface includes a terminal, and an inter-cell flow passage is formed between adjacent ones of the secondary cells. A primary flow passage is defined between the primary surfaces and a wall surface of the case that faces the primary surfaces. A secondary flow passage is defined between the secondary surfaces and the wall surface of the case that faces the secondary surfaces. One of the primary flow passage and the secondary flow passage functions as a supply passage that supplies a heat medium to the inter-cell flow passage. The other one of the primary flow passage and the secondary flow passage functions as a discharge passage to which the heat medium is discharged from the inter-cell flow passage.
    Type: Application
    Filed: March 11, 2013
    Publication date: February 5, 2015
    Inventors: Hirokuni Akiyama, Hiromi Ueda, Shintaro Watanabe, Shimpei Mune, Hidefumi Oishi, Yoshihiro Katagiri
  • Publication number: 20140242469
    Abstract: Provided is a negative electrode active material containing SiOx and carbonaceous particles containing graphite and having both good discharge capacity and good electric conductivity. Also provided is a negative electrode using the negative electrode active material and a nonaqueous electrolyte secondary battery. When the carbonaceous particles have an average particle diameter D50 of ? (?m) and a BET specific surface area of ? (m2/g), the ? and the ? satisfy the following Formulae (1) and (2).
    Type: Application
    Filed: February 21, 2014
    Publication date: August 28, 2014
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Megumi YAMAMOTO, Hideaki SHINODA, Hirokuni AKIYAMA, Manabu MIYOSHI
  • Publication number: 20130008480
    Abstract: A thermoelectric conversion device includes a first board, a second board, which is arranged to face the first board, and thermoelectric elements. One end of each thermoelectric element is joined to a first electrode layer on the first board, and the other end is joined to a second electrode layer on the second board. The thermoelectric conversion device includes reinforcing members. One end of each reinforcing members joined to the first insulating plate, and the other end is joined a second insulating plate. In the thermoelectric conversion device, the coefficient of linear expansion of the reinforcing members is greater than the coefficient of linear expansion of the thermoelectric elements.
    Type: Application
    Filed: July 3, 2012
    Publication date: January 10, 2013
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hirokuni AKIYAMA, Shimpei MUNE, Naoto MORISAKU, Toshimitsu TANAKA
  • Publication number: 20120325281
    Abstract: The method of manufacturing a thermoelectric conversion module includes the steps of providing a first inner surface of a first substrate with plural first electrodes and a first positioning portion, wherein the first positioning portion is located at a predetermined position to the first electrodes without overlapping with the first electrodes, providing a second inner surface of a second substrate with plural second electrodes and a second positioning portion, wherein the second positioning portion is located at a predetermined position to the second electrodes without overlapping with the second electrodes, providing the first electrodes with plural thermoelectric conversion elements, positioning a spacer to the first substrate with a third positioning portion of the spacer on the first positioning portion, and providing the thermoelectric conversion elements with the second electrodes by positioning the second substrate to the spacer with the second positioning portion on a fourth positioning portion of t
    Type: Application
    Filed: June 19, 2012
    Publication date: December 27, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hirokuni AKIYAMA, Hirohisa KATO, Naoto MORISAKU, Shimpei MUNE
  • Publication number: 20120325280
    Abstract: Embodiments of the present invention may include a thermoelectric conversion unit having a pair of substrates opposing each other, thermoelectric conversion elements provided between the pair of substrates, a frame member, and a case. The frame member may be mounted along an outer peripheral portion of the pair of substrates. The case may be formed with flow channels having an opened structure. Opening portions of the flow channels may be covered with the substrates. The case may include a peripheral wall portion configured to cover the outer peripheral portion of the frame member. The peripheral wall portion of the case and the outer peripheral portion of the frame member preferably tightly contact each other to achieve sealing.
    Type: Application
    Filed: June 18, 2012
    Publication date: December 27, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hirokuni AKIYAMA, Hirohisa KATO, Motoaki OKUDA
  • Publication number: 20120291832
    Abstract: A thermoelectric conversion module includes a plurality of first substrates and a plurality of second substrates disposed to face each other, a plurality of first electrodes and a plurality of second electrodes, a plurality of thermoelectric conversion elements, a base plate, first fins and second fins. Each inner surface of the first substrate faces the respective inner surface of the second substrate. The first electrode is joined to the respective inner surface of the first substrate and the second electrode is joined to the respective inner surface of the second substrate. The thermoelectric conversion elements are electrically connected to each other through the first and the second electrodes. The base plate is thermally joined to the outer surfaces of the first substrates. Each first fin is thermally joined to the outer surface of the base plate. Each second fin is thermally and directly joined to the respective outer surface of the second substrate.
    Type: Application
    Filed: May 9, 2012
    Publication date: November 22, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Motoaki Okuda, Naoya Yokomachi, Hirokuni Akiyama, Naoto Morisaku
  • Publication number: 20120255590
    Abstract: A thermoelectric conversion module includes two substrates, electrodes, thermoelectric conversion elements provided between the substrates and electrically connected in series via the electrodes, a polygonally-shaped thermoelectric conversion element disposition area provided on inner surface of the substrate wherein the thermoelectric conversion elements are disposed in the thermoelectric conversion element area, a fin radiator provided on outer surface of the substrate and a fin disposition area wherein the fin radiator is disposed in the fin disposition area. The fin disposition area and the thermoelectric conversion element disposition area are located on opposite sides of the substrates so as to overlap each other via the substrate.
    Type: Application
    Filed: April 6, 2012
    Publication date: October 11, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Naoto Morisaku, Hirokuni Akiyama, Toshimitsu Tanaka, Shimpei Mune
  • Publication number: 20120247126
    Abstract: A vehicle air conditioner includes a thermoelectric conversion module, a first heat exchanger, a second heat exchanger, a first air-conditioning heat exchanger, a second air-conditioning heat exchanger, a radiator, a first circuit connecting the first heat exchanger and the first air-conditioning heat exchanger and a second circuit connecting the second heat exchanger, the second air-conditioning heat exchanger and the radiator. The second circuit includes a bypass passage that bypasses the second air-conditioning heat exchanger and a first switching device switching selectively between a first position where heat exchange medium flows through the bypass passage without allowing the heat exchange medium to flow through the second air-conditioning heat exchanger and a second position where the heat exchange medium flows through the second air-conditioning heat exchanger.
    Type: Application
    Filed: March 23, 2012
    Publication date: October 4, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Masakazu MURASE, Naoya YOKOMACHI, Hirohisa KATO, Hirokuni AKIYAMA, Norihiko NAKAMURA
  • Publication number: 20120192573
    Abstract: The air-conditioning core includes a plurality of first Peltier devices, a plurality of first fins and a tube. Each of the first Peltier devices has a first surface and a second surface. The first fins are located on the first surfaces of the first Peltier devices. The tube is located adjacent to the second surfaces of the first Peltier devices. The tube has a main portion extending around the second surfaces of the first Peltier devices and also around the first fins for holding the first Peltier devices, an inlet portion connected to the main portion for allowing heat exchange medium of liquid to flow into the main portion, and an outlet portion connected to the main portion for allowing the heat exchange medium of liquid to flow out of the main portion. The outlet portion is located adjacent to the inlet portion.
    Type: Application
    Filed: January 25, 2012
    Publication date: August 2, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hirokuni AKIYAMA, Hirohisa KATO, Naoto MORISAKU, Naoya YOKOMACHI, Masakazu MURASE, Takahisa BAN
  • Publication number: 20120125013
    Abstract: The air conditioner includes an air-conditioning core, a first air-conditioning passage, a liquid passage and a second air-conditioning passage. The core includes a Peltier device having first and second surfaces, a first surface-side passage and a second surface-side passage. The second surface-side passage has a first passage and a second passage that transfer heat therebetween. The first air-conditioning passage is connected to the first surface-side passage for allowing first air-conditioning air in the first air-conditioning passage to flow through the first surface-side passage. The liquid passage is connected to the first passage for allowing liquid that serves as a heat transfer medium to flow through the first passage. The second air-conditioning passage is connected to the second passage for allowing second air-conditioning air in the second air-conditioning passage to flow through the second passage.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 24, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hirokuni AKIYAMA, Hirohisa KATO, Naoto MORISAKU, Naoya YOKOMACHI, Masakazu MURASE, Takahisa BAN
  • Publication number: 20120117983
    Abstract: The air-conditioning heat exchanger includes a plurality of Peltier devices, a plurality of first heat transfer members, a plurality of second heat transfer members, an air-conditioning passage and a heat exchange medium passage. The air-conditioning passage has therein the Peltier devices and the first heat transfer members. The air-conditioning passage allows air to be air-conditioned to flow therethrough. The air-conditioning passage has a plurality of divided passages at least at positions that are downstream of upstream ends of the first heat transfer members with respect to an air flowing direction in which the air flows through the air-conditioning passage. The Peltier device in each divided passage is controlled separately from the Peltier device in other divided passage. The heat exchange medium passage has therein the second heat transfer members and allows fluid to flow through the heat exchange medium passage.
    Type: Application
    Filed: November 11, 2011
    Publication date: May 17, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hirokuni AKIYAMA, Hirohisa KATO, Naoto MORISAKU, Naoya YOKOMACHI, Masakazu MURASE, Takahisa BAN
  • Publication number: 20120057305
    Abstract: The semiconductor unit includes a wiring board, a conductor layer and a fin. The wiring board has across a thickness thereof a first surface and a second surface. The conductor layer is formed on the first surface of the wiring board. The conductor layer has a length and a width as viewed in the direction of the thickness of the wiring board. The fin is joined to the second surface of the wiring board. The fin has a bent edge that extends in the direction of the length of the conductor layer.
    Type: Application
    Filed: August 24, 2011
    Publication date: March 8, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Naoto Morisaku, Hirokuni Akiyama
  • Publication number: 20120000501
    Abstract: A connection structure for elements includes a first plate having an electrode layer formed on one surface of the first plate, an element connected to the electrode layer at one surface of the element and a second plate connected to the other surface of the element. A connection method for the above elements comprises the steps of: disposing the element on upper surface of the electrode layer of the first plate through solder and the second plate on upper surface of the element through conductive paste and heating the solder and the conductive paste simultaneously for melting the solder and calcining the conductive paste.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 5, 2012
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Naoto MORISAKU, Hirokuni AKIYAMA
  • Publication number: 20110214838
    Abstract: A vehicle air conditioner includes a first heat storage device having a first heat storage medium, a battery disposed under a floor of a compartment of a vehicle on a chassis side and a heat insulator covering the first heat storage device for insulating. The first heat storage device is disposed on and thermally connected to the battery.
    Type: Application
    Filed: February 23, 2011
    Publication date: September 8, 2011
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Hirokuni AKIYAMA, Hidehito Kubo, Naoya Yokomachi, Masahiro Kawaguchi