Patents by Inventor Tatsuhiko Kawasaki
Tatsuhiko Kawasaki 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: 20230275307Abstract: A battery assembly includes a battery body, a plurality of battery cells stacked in the battery body in a stacking direction, a pair of end components, including insulating material, each disposed at an end of the battery body in the stacking direction, and a pair of side plates, including metal, disposed on opposite sides of the battery cells and connecting to the end components. A first end component of the pair of end components includes a fixing portion, which accommodates a fixing body, to install the battery assembly to an installing body. The fixing portion and the side plates are not connected electrically to each other.Type: ApplicationFiled: April 7, 2023Publication date: August 31, 2023Applicant: VEHICLE ENERGY JAPAN INC.Inventors: Eisuke SENGOKU, Takuro TSUNAKI, Takashi SUZUKI, Tatsuo SUGAWARA, Tatsuhiko KAWASAKI
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Publication number: 20220149487Abstract: Provided is a busbar capable of keeping a joint strength high at a joint between dissimilar metals. The busbar (2) joins terminals of a plurality of battery cells, the terminals each including a dissimilar metal. The busbar includes: a copper portion (2e) to be connected to a first terminal (in) of a first battery; an aluminum portion (2f) to be connected to a second terminal (1p) of a second battery; and a joint (2x) including the copper portion bonded to the aluminum portion. The aluminum portion is placed so as not to overlap the bonding region between the first terminal and the copper portion, and has arms (2f1) extending in a direction from the second terminal to the first terminal. The joint includes the copper portion bonded to the arms, and the arms have a width such that a proximal end portion is wider than a distal end portion of the arms.Type: ApplicationFiled: December 3, 2019Publication date: May 12, 2022Inventors: Nobuyoshi TANAKA, Kazuaki URANO, Tatsuhiko KAWASAKI
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Publication number: 20210384592Abstract: Provided is a battery module capable of keeping a joint strength high at a joint between dissimilar metals of a busbar. A battery module 100 of the present invention includes a plurality of battery cells each having cell terminals 1p and 1n, and a busbar 2A joining the terminals of the battery cells 1. The busbar 2A has a plurality of connection face portions 2c1 and 2c2 each connected to a corresponding one of the terminals 1p and 1n of the battery cells 1; a plurality of rising portions each rising from a corresponding one of the plurality of connection face portions 2c1 and 2c2; and a connection portion connecting the plurality of rising portions. The busbar includes a copper portion 2e including copper and an aluminum portion 2f including aluminum, and a joint between the copper portion 2e and the aluminum portion 2f are located on the connection face portion 2c1, 2c2.Type: ApplicationFiled: October 17, 2019Publication date: December 9, 2021Inventors: Kazuaki URANO, Hiroaki MASUDA, Tatsuhiko KAWASAKI, Osamu KUBOTA
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Patent number: 9325034Abstract: Disclosed herein is a highly reliable secondary battery with organic electrolytic solution. The secondary battery has a set of plates for the positive and negative electrodes, with a separator interposed between them, and an organic electrolytic solution composed of an organic solvent and an electrolyte dissolved therein. The organic electrolytic solution contains polyethylene glycol and bis-(3-Sulfopropyl)disulfide.Type: GrantFiled: November 18, 2010Date of Patent: April 26, 2016Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kenji Hara, Tatsuhiko Kawasaki, Hirofumi Takahashi
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Patent number: 9077043Abstract: The present invention is a secondary battery, including: an electrode group that includes a positive electrode and a negative electrode, an electrolyte, and a battery cell container that contains the electrode group and the electrolyte and that is sealed, wherein: an adhesive layer for trapping foreign matter present inside the battery cell container is disposed in the battery cell container by exposing at least part of the adhesive layer so as to allow the adhesive layer to come into contact with the electrolyte.Type: GrantFiled: July 20, 2011Date of Patent: July 7, 2015Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Yuichi Takatsuka, Katsunori Suzuki, Sho Matsumoto, Kenji Nakai, Tatsuhiko Kawasaki, Hirofumi Takahashi, Yoshio Onodera
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Publication number: 20150064550Abstract: An object of the present invention is to provide a prismatic secondary cell 1 having a structure that makes it easy to inject an electrolytic solution into a cell can 2 and seal the cell can. The prismatic secondary cell 1 is configured so that an electrode group 4 is housed in the cell can 2 and that an opening 2a in the cell can 2 is sealed with a cell lid 3. The prismatic secondary cell 1 includes a solution injection section 7 and a plug section 8. The solution injection section 7 has a plurality of through-holes 21, 22 that penetrate the cell lid 3 and are positioned adjacent to each other. The plug section 8 is attached to the solution injection section 7 to integrally seal the through-holes 21, 22.Type: ApplicationFiled: February 22, 2012Publication date: March 5, 2015Inventors: Tatsuhiko Kawasaki, Nobuyuki Hori
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Publication number: 20130295447Abstract: Disclosed herein is a highly reliable secondary battery with organic electrolytic solution. The secondary battery has a set of plates for the positive and negative electrodes, with a separator interposed between them, and an organic electrolytic solution composed of an organic solvent and an electrolyte dissolved therein. The organic electrolytic solution contains polyethylene glycol and bis-3-sulfopropyl-sulfide-2-sodium.Type: ApplicationFiled: November 18, 2010Publication date: November 7, 2013Applicant: Hitachi Vehicle Energy, Ltd.Inventors: Kenji Hara, Tatsuhiko Kawasaki, Hirofumi Takahashi
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Patent number: 8405312Abstract: Increase of an address voltage change amount of a PDP is suppressed. X and Y electrodes which are a display electrode pair arranged on a plate; a dielectric layer covering the X and Y electrodes; and a protective layer covering the dielectric layer are provided. The protective layer includes an MgO film deposited on a surface of the dielectric layer and a plurality of MgO crystalline particles attached on the MgO film. Also, by using (110) orientation as a crystal orientation of the MgO film, a crystal density of the MgO film can be increased, so that an increase of the address voltage change amount can be suppressed.Type: GrantFiled: August 24, 2009Date of Patent: March 26, 2013Assignee: Hitachi Consumer Electronics Co., Ltd.Inventors: Tatsuhiko Kawasaki, Masayuki Wada, Atsuo Ohtomi
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Publication number: 20120062238Abstract: A battery controller for controlling an assembled battery configured by connecting battery groups each including battery cells, includes: voltage measuring units that are provided respectively for the battery groups each to measure a voltage of each of the battery cells included in a corresponding battery group; a minimum value detecting unit that detects a minimum value of the battery cells for each of the battery groups based upon the measured voltage of each of the battery cells; a reference value setting unit that sets a reference value used to determine an abnormal voltage drop for each of the battery groups based upon the measured voltage of each of the battery cells; and an abnormality determining unit that makes a determination that an abnormal voltage drop is present, if a difference between the reference value and the minimum value exceeds a predetermined value, for each of the battery groups.Type: ApplicationFiled: August 19, 2011Publication date: March 15, 2012Applicant: Hitachi Vehicle Energy, Ltd.Inventors: Tatsuhiko Kawasaki, Kenji Hara, Toshiyuki Nanto, Hirofumi Takahashi
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Publication number: 20120021276Abstract: The present invention is a secondary battery, including: an electrode group that includes a positive electrode and a negative electrode, an electrolyte, and a battery cell container that contains the electrode group and the electrolyte and that is sealed, wherein: an adhesive layer for trapping foreign matter present inside the battery cell container is disposed in the battery cell container by exposing at least part of the adhesive layer so as to allow the adhesive layer to come into contact with the electrolyte.Type: ApplicationFiled: July 20, 2011Publication date: January 26, 2012Inventors: Yuichi TAKATSUKA, Katsunori Suzuki, Sho Matsumoto, Kenji Nakai, Tatsuhiko Kawasaki, Hirofumi Takahashi, Yoshio Onodera
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Patent number: 7816868Abstract: A variation with the passage of time of a response speed is reduced. In a plasma display panel having a magnesium oxide film formed on a dielectric layer covering electrodes for gas discharge, the magnesium oxide film has an oxygen deficiency amount within a range of 3.0×1017 to 1.0×1020 per cubic centimeter, preferably within a range of 3.0×1017 to 1.0×1018 per cubic centimeter. The magnesium oxide film has a crystal orientation of (220) plane orientation.Type: GrantFiled: July 28, 2008Date of Patent: October 19, 2010Assignee: Hitachi, Ltd.Inventors: Tatsuhiko Kawasaki, Fumiaki Yoshino, Atsuo Ohtomi, Shinichi Kameda
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Publication number: 20100079417Abstract: Increase of an address voltage change amount of a PDP is suppressed. X and Y electrodes which are a display electrode pair arranged on a plate; a dielectric layer covering the X and Y electrodes; and a protective layer covering the dielectric layer are provided. The protective layer includes an MgO film deposited on a surface of the dielectric layer and a plurality of MgO crystalline particles attached on the MgO film. Also, by using (110) orientation as a crystal orientation of the MgO film, a crystal density of the MgO film can be increased, so that an increase of the address voltage change amount can be suppressed.Type: ApplicationFiled: August 24, 2009Publication date: April 1, 2010Inventors: Tatsuhiko KAWASAKI, Masayuki WADA, Atsuo OHTOMI
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Publication number: 20090167174Abstract: A variation with the passage of time of a response speed is reduced. In a plasma display panel having a magnesium oxide film formed on a dielectric layer covering electrodes for gas discharge, the magnesium oxide film has an oxygen deficiency amount within a range of 3.0×1017 to 1.0×1020 per cubic centimeter, preferably within a range of 3.0×1017 to 1.0×1018 per cubic centimeter. The magnesium oxide film has a crystal orientation of (220) plane orientation.Type: ApplicationFiled: July 28, 2008Publication date: July 2, 2009Inventors: Tatsuhiko KAWASAKI, Fumiaki YOSHINO, Atsuo OHTOMI, Shinichi KAMEDA
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Publication number: 20090160338Abstract: A plasma display panel includes a magnesium oxide film (18) that covers electrodes (X, Y) and is exposed to a discharge gas space (31). The magnesium oxide film (18) includes silicon and calcium as impurities, and the content of the impurities in the magnesium oxide film (18) is 800 to 2050 ppm by weight. By suppressing the total content of silicon and calcium in the film to 800 to 2050 ppm by weight, the discharge start voltage can be reduced by no less than 20 volts.Type: ApplicationFiled: July 19, 2006Publication date: June 25, 2009Applicant: Hitachi Plasma Display LimitedInventors: Masayuki Wada, Fumiaki Yoshino, Tatsuhiko Kawasaki
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Publication number: 20080079363Abstract: In a plasma display panel having a discharge gas sealed in a gap between a front side substrate and a rear side substrate opposed to each other and having ribs partitioning a gas-sealed space into a discharge cell array arranged above an inner surface of one of the substrates, the rib includes an upper-layer rib and a lower-layer rib, and the upper-layer rib and the lower-layer rib are made of rib materials different from each other in resistance to etching, thereby allowing for formation of high ribs to enlarge the discharge space without affecting the upper-layer ribs when forming the lower-layer ribs.Type: ApplicationFiled: April 24, 2007Publication date: April 3, 2008Inventors: Takashi Yoshinaga, Tatsuhiko Kawasaki
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Publication number: 20070262717Abstract: A plasma display panel includes: a front substrate having a sustain electrode and a scan electrode for causing surface discharge, and a first dielectric layer which covers the sustain electrode and the scan electrode; a rear substrate having an address electrode extending across the sustain electrode and the scan electrode, and a second dielectric layer which covers the address electrode; a partition wall disposed in a discharge space defined between the front substrate and the rear substrate combined together and partitioning the discharge space; and a fluorescent layer covering a side surface of the partition wall and the second dielectric layer; wherein the second dielectric layer has a light absorbing function, and the partition wall has a light transmitting function. The plasma display panel ensures higher brightness and higher contrast.Type: ApplicationFiled: March 7, 2007Publication date: November 15, 2007Inventors: Masashi Ohta, Tatsuhiko Kawasaki, Takashi Sasaki
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Patent number: 7061479Abstract: A driving method of the present invention is adapted to a plasma display panel which includes first and second electrodes formed on a substrate, third electrodes formed in a direction intersecting the first and second electrodes, and a dielectric layer covering the first and second electrodes. The driving method includes the steps of generating an address discharge between the first and the third electrode to select a predetermined cell and sustain discharges between the first and the second electrode to produce light for display, and controlling the plasma display panel such that the discharge intensity of a sustain discharge in which the second electrode serves as the anode is smaller than the discharge intensity of a sustain discharge in which the first electrode serves as the anode.Type: GrantFiled: June 1, 2005Date of Patent: June 13, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuhiko Kawasaki, Takashi Sasaki
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Publication number: 20060082308Abstract: An AC type plasma display panel includes a front substrate and a rear substrate defining a discharge space therebetween, electrodes formed on the inner surface of the front substrate, a dielectric layer covering the electrodes, and a protective film covering the dielectric layer. The difference in the index of refraction between the dielectric layer and the protective film is not greater than 0.20. According to the present invention, lack of uniformity due to interference is lessened by taking the difference in the index of refraction between a dielectric layer and a protective film into consideration.Type: ApplicationFiled: October 12, 2005Publication date: April 20, 2006Applicant: Fujitsu Hitachi Plasma Display LimitedInventor: Tatsuhiko Kawasaki
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Publication number: 20050225511Abstract: A driving method of the present invention is adapted to a plasma display panel which includes first and second electrodes formed on a substrate, third electrodes formed in a direction intersecting the first and second electrodes, and a dielectric layer covering the first and second electrodes. The driving method includes the steps of generating an address discharge between the first and the third electrode to select a predetermined cell and sustain discharges between the first and the second electrode to produce light for display, and controlling the plasma display panel such that the discharge intensity of a sustain discharge in which the second electrode serves as the anode is smaller than the discharge intensity of a sustain discharge in which the first electrode serves as the anode.Type: ApplicationFiled: June 1, 2005Publication date: October 13, 2005Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuhiko Kawasaki, Takashi Sasaki
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Patent number: 6924795Abstract: A driving method of the present invention is adapted to a plasma display panel which includes first and second electrodes formed on a substrate, third electrodes formed in a direction intersecting the first and second electrodes, and a dielectric layer covering the first and second electrodes. The driving method includes the steps of generating an address discharge between the first and the third electrode to select a predetermined cell and sustain discharges between the first and the second electrode to produce light for display, and controlling the plasma display panel such that the discharge intensity of a sustain discharge in which the second electrode serves as the anode is smaller than the discharge intensity of a sustain discharge in which the first electrode serves as the anode.Type: GrantFiled: March 4, 2003Date of Patent: August 2, 2005Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuhiko Kawasaki, Takashi Sasaki