Patents by Inventor Takamitsu Saito

Takamitsu Saito 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: 7326492
    Abstract: A laminate battery is provided with a tab, an electric power generating element connected to the tab, and a laminate sheet allowing the electric power generating element to be accommodated. The laminate sheet includes a metallic layer and a thermally welding resin layer laminated on the metallic layer. The tab and the thermally welding resin layer are welded by permitting a thermally welding area, which is formed in at least one of the thermally welding resin layer and the tab, and the other of the thermally welding resin layer and the tab to be welded to one another.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: February 5, 2008
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takaaki Abe, Takanori Ito, Osamu Shimamura, Takamitsu Saito, Hideaki Horie, Hiroshi Sugawara, Yukinori Takahashi, Masaaki Suzuki, Kenji Hamada
  • Publication number: 20080014498
    Abstract: A cell electrode of the present invention has a current collector and an active material layer formed on the current collector. The active material layer contains: an active material in which a mean particle diameter is more than 1 ?m to 5 ?m or less and a BET specific surface area is 1 to 5 m2/g; and a conductive material of which content is 3 to 50 mass % with respect to 100 mass % of the active material.
    Type: Application
    Filed: June 28, 2007
    Publication date: January 17, 2008
    Inventors: Tomaru OGAWA, Takamitsu SAITO, Tamaki MIURA, Taketo KANEKO
  • Patent number: 7282297
    Abstract: A laminate cell comprises a power generating element formed by sequentially stacking positive electrode plates and negative electrode plates while interposing separators therebetween; a cell package formed of a metal composite film, the cell package hermetically sealing the power generating element and an electrolyte; a positive tab connected to the positive electrode plates; and a negative tab connected to the negative electrode plates. According to the laminate cell, the power generating element and the cell package have approximately rectangular plane shapes, and the positive tab and the negative tab are drawn outward from end edges of long sides of the cell package.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: October 16, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yasunari Hisamitsu, Takaaki Abe, Takanori Ito, Osamu Shimamura, Takamitsu Saito, Hideaki Horie, Hiroshi Sugawara
  • Publication number: 20070195125
    Abstract: An electrode and method for preparing the same in which droplets of a first electrode ink composition and droplets of a second electrode ink composition are ejected from an ink jet device onto a base material and the first electrode ink composition contains at least one electrode active material and the second electrode ink composition contains at least one binder material. The resulting electrode is suitable for use in a battery.
    Type: Application
    Filed: December 13, 2005
    Publication date: August 23, 2007
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Takamitsu Saito, Takuya Kinoshita, Hideaki Horis, Kyouichi Watanabe
  • Publication number: 20070105328
    Abstract: The invention relates to fuel cells and methods of making bipolar fuel cell electrodes. The invention provides a method of producing bipolar fuel cell electrodes, including providing a collector having a first side and a second side opposite the first side, coating the first side with a first active material, coating the second side with a second active material, and compressing the coated collector to form a bipolar cell electrode. The invention also provides a method of producing bipolar fuel cell electrodes wherein the first side of the collector is first coated with the first active material and compressed at a first pressure, and subsequently the second side of the collector is coated with the second active material and compressed at a second pressure. The invention further provides an improved bipolar electrode for fuel cells.
    Type: Application
    Filed: November 1, 2005
    Publication date: May 10, 2007
    Inventors: Takamitsu Saito, Hideaki Horie, Taketo Kaneko
  • Publication number: 20070082265
    Abstract: A positive electrode material for non-aqueous electrolyte lithium ion battery (31, 41) of the present invention has an oxide (11) containing lithium and nickel, and a lithium compound (13) which is deposited on a surface of the oxide (11) and covers nickel present on the surface of the oxide (11). By this structure, it is possible to suppress decomposition of an electrolysis solution as much as possible and drastically reduce swelling of the batteries (31, 41).
    Type: Application
    Filed: November 29, 2004
    Publication date: April 12, 2007
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Takanori Itou, Takamitsu Saito, Hideaki Horie
  • Patent number: 7172836
    Abstract: The present invention relates to a nonaqueous electrolyte battery comprising: a cathode including a positive active material; an negative including a negative active material and a nonaqueous electrolyte, wherein assuming that the first charging capacity of the positive active material per gram is Cc [mAh/g], the weight of the positive active material is Cw [g], the first charging capacity of the negative active material per gram is Ac [mAh/g], the first discharging capacity is Ad [mAh/g] and the weight of the negative active material is Aw [g], the value of X [%] represented by a formula 16 is located within a range expressed by 20?X?50. ( Ac - Ad ) × Aw Cc × Cw × 100 = X ( formula ? ? 16 ) Thus, the deterioration of a capacity due to charging and discharging cycles is suppressed.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: February 6, 2007
    Assignee: Sony Corporation
    Inventors: Takamitsu Saito, Yoshikatsu Yamamoto, Shinji Hatake
  • Publication number: 20060257736
    Abstract: An electrode (100) of the present invention contains a collector (104) and an electrode layer (102) which is disposed on the collector (104) and contains an active material. In the electrode (100), an average thickness (h) of the collector (104) and the electrode layer (102) ranges from 5 to 300 (m, and a maximum thickness (h) of the collector (104) and the electrode layer (102) is not more than 105% of a minimum thickness (h) of the collector (104) and the electrode layer (102). The electrode (100) is very thin and the uniformity of the electrode layer (102) is high. Therefore, the heat dissipation characteristics of the battery (300) are uniform, the local degradation is hardly generated in the battery (300), and the crack and the rupture are also hardly generated in the battery (300).
    Type: Application
    Filed: May 31, 2004
    Publication date: November 16, 2006
    Inventors: Kyoichi Watanabe, Hideaki Horie, Osamu Shimamura, Takamitsu Saito
  • Publication number: 20060251965
    Abstract: In a nonaqueous electrolyte cell-oriented electrode (10), an electrode active material layer (12) formed on a collector (1) has a density gradient developed with a gradient of a varied concentration of a solid along a thickness from a surface of the electrode active material layer (12) toward the collector (1), and in a gel electrolyte cell-oriented electrode (30), an electrode active material layer (32) formed on a collector (1) has a density gradient developed with (a) gradient(s) of (a) varied concentration(s) of one or both of an electrolyte salt and a film forming material along a thickness from a surface of the electrode active material layer (32) toward the collector (1).
    Type: Application
    Filed: July 27, 2004
    Publication date: November 9, 2006
    Inventors: Mori Nagayama, Takamitsu Saito, Osamu Shimamura
  • Publication number: 20060185154
    Abstract: With a method of manufacturing a secondary battery electrode having active material (111) on a current collector (110), a computer (100) acquires a deposition pattern (PT) for depositing a plurality of kinds of active materials, different in electrical characteristic, onto discrete areas of a current collector, and the computer allows injection nozzles (108) to inject the plurality of kinds of active materials onto the current collector as multiple particles (P), respectively, to be deposited thereon, thereby forming an active material layer.
    Type: Application
    Filed: May 31, 2004
    Publication date: August 24, 2006
    Inventors: Takamitsu Saito, Hideaki Horie, Osamu Shimamura
  • Publication number: 20060127763
    Abstract: The present invention provides a cell structure that can improve heat dissipation and vibration-proofing nature of a cell without using a cooling medium while keeping rigidity and discharge current quantity of the cell and is characterized by satisfying the following inequality (1): S c × 1000 > b × 1000 S wherein b indicates short-side length of an electrode; S indicates electrode area; and c indicates cell structure thickness.
    Type: Application
    Filed: November 22, 2005
    Publication date: June 15, 2006
    Inventors: Kyouichi Watanabe, Takaaki Abe, Osamu Shimamura, Takamitsu Saito, Hajime Sato, Kenji Hosaka, Hideaki Horie
  • Publication number: 20050264267
    Abstract: A inverter has a switching device for switching DC to change it to AC, and a bipolar type rechargeable battery connected to the switching device in parallel or in series for smoothing the current from the switching device.
    Type: Application
    Filed: May 20, 2005
    Publication date: December 1, 2005
    Inventors: Hideaki Horie, Takaaki Abe, Takamitsu Saito, Osamu Shimamura
  • Publication number: 20050233210
    Abstract: A battery including: a solid electrolyte film; and a plurality of unit cells formed thereon and connected in parallel. Each of the unit cells consists of: a positive electrode provided on one side of the solid electrolyte film; a negative electrode provided on the other side of the solid electrolyte film at a position opposite to the positive electrode; and a part of the solid electrolyte film sandwiched between the positive electrode and the negative electrode.
    Type: Application
    Filed: December 16, 2004
    Publication date: October 20, 2005
    Inventors: Hideaki Horie, Takamitsu Saito, Osamu Shimamura
  • Publication number: 20050132562
    Abstract: A method of manufacturing a solid electrolyte battery includes a step of thermally pressing a composite layer including a positive electrode ink layer, an electrolyte ink layer and a negative electrode ink layer that are formed by coating a positive electrode ink, an electrolyte ink and a negative electrode ink. Further, the positive electrode ink, the electrolyte ink and the negative electrode ink contain a polymer electrolyte. By this method, it is possible to improve the flow of ions across respective interlayers of a positive electrode active material layer, a solid electrolyte layer and a negative electrode active material layer.
    Type: Application
    Filed: December 20, 2004
    Publication date: June 23, 2005
    Inventors: Takamitsu Saito, Hideaki Horie
  • Publication number: 20040062983
    Abstract: A laminate battery is provided with a tab, an electric power generating element connected to the tab, and a laminate sheet allowing the electric power generating element to be accommodated. The laminate sheet includes a metallic layer and a thermally welding resin layer laminated on the metallic layer. The tab and the thermally welding resin layer are welded by permitting a thermally welding area, which is formed in at least one of the thermally welding resin layer and the tab, and the other of the thermally welding resin layer and the tab to be welded to one another.
    Type: Application
    Filed: September 11, 2003
    Publication date: April 1, 2004
    Applicant: NISSAN MOTOR CO., LTD
    Inventors: Takaaki Abe, Takanori Ito, Osamu Shimamura, Takamitsu Saito, Hideaki Horie, Hiroshi Sugawara, Yukinori Takahashi, Masaaki Suzuki, Kenji Hamada
  • Publication number: 20040043289
    Abstract: A laminate packaging flat cell comprises a laminate film formed by combining polymer and metal with each other; a power generating element formed of a plurality of electrode plates and separators, and hermetically sealed by the laminate film; and an electrode terminal lead coupled to the electrode plate. In the laminate packaging flat cell of the present invention, the power generating element is hermetically sealed by forming a thermally welded portion on an outer periphery of the laminate film, and the electrode terminal lead protrudes from the thermally welded portion, and a through-hole is provided in a position thereof contacting the thermally welded portion.
    Type: Application
    Filed: August 22, 2003
    Publication date: March 4, 2004
    Applicant: NISSAN MOTOR CO., LTD
    Inventors: Osamu Shimamura, Takaaki Abe, Takanori Ito, Takamitsu Saito, Hideaki Horie, Hiroshi Sugawara
  • Publication number: 20040038124
    Abstract: A laminate cell comprises a power generating element formed by sequentially stacking positive electrode plates and negative electrode plates while interposing separators therebetween; a cell package formed of a metal composite film, the cell package hermetically sealing the power generating element and an electrolyte; a positive tab connected to the positive electrode plates; and a negative tab connected to the negative electrode plates. According to the laminate cell, the power generating element and the cell package have approximately rectangular plane shapes, and the positive tab and the negative tab are drawn outward from end edges of long sides of the cell package.
    Type: Application
    Filed: August 14, 2003
    Publication date: February 26, 2004
    Applicant: NISSAN MOTOR CO., LTD
    Inventors: Yasunari Hisamitsu, Takaaki Abe, Takanori Ito, Osamu Shimamura, Takamitsu Saito, Hideaki Horie, Hiroshi Sugawara
  • Publication number: 20040038122
    Abstract: A laminate cell comprises a power generating element formed by sequentially stacking positive electrode plates and negative electrode plates while interposing separators therebetween; a positive tab connected to the positive electrode plates through a plurality of positive leads; a negative tab connected to the negative electrode plates through a plurality of negative leads; and a cell package formed of a metal composite film, the cell package hermetically sealing the power generating element and an electrolyte. According to the laminate cell, the heat capacity of a portion of the positive tab, onto which a plurality of the positive leads are joined, and the heat capacity of a portion of the negative tab, onto which a plurality of the negative leads are joined, are made larger than that of other portions of the positive tab and the negative tab.
    Type: Application
    Filed: August 14, 2003
    Publication date: February 26, 2004
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yasunari Hisamitsu, Takaaki Abe, Takanori Ito, Osamu Shimamura, Takamitsu Saito, Hideaki Horie, Hiroshi Sugawara
  • Publication number: 20030180614
    Abstract: The present invention relates to a nonaqueous electrolyte battery comprising: a cathode including a positive active material; an negative including a negative active material and a nonaqueous electrolyte, wherein assuming that the first charging capacity of the positive active material per gram is Cc [mAh/g], the weight of the positive active material is Cw [g], the first charging capacity of the negative active material per gram is Ac [mAh/g], the first discharging capacity is Ad [mAh/g] and the weight of the negative active material is Aw [g], the value of X [%] represented by a formula 16 is located within a range expressed by 20≦X≦50.
    Type: Application
    Filed: May 9, 2003
    Publication date: September 25, 2003
    Inventors: Takamitsu Saito, Yoshikatsu Yamamoto, Shinji Hatake
  • Patent number: 6259768
    Abstract: A method employs simple procedures to speedily carry out loopback tests on devices that form a channel system of an exchange. The method is capable of quickly locating a fault in the exchange and allowing speedy maintenance work of the exchange. Also provided is an apparatus for achieving the method. The apparatus has a path setter (1-4), a loopback controller (1-3), and a tester (1-1), to test the devices of the channel system (1-2) of the exchange. The devices to be tested are arranged in replaceable units (1-21, 1-22). The path setter (1-4) simultaneously sets paths to sequentially connect the devices to be tested. The loopback controller (1-3) activates and releases loopback parts arranged in the devices to be tested. The tester (1-1) sends a test signal to the devices through the paths, receives the test signal looped back by the loopback parts, analyzes the received signal, and determines whether or not the devices are sound.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: July 10, 2001
    Assignee: Fujitsu Limited
    Inventors: Tomomi Kato, Masatoshi Takita, Kazuei Ohnishi, Takamitsu Saito, Kosei Mano