Patents by Inventor Seijiro Ochiai

Seijiro Ochiai 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).

  • Publication number: 20200168958
    Abstract: A charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode, is configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode. The deposition potential is variable in accordance with a state of charge of the energy storage device, and/or charge time of the energy storage device, and/or current inputted to the energy storage device, and/or temperature of the energy storage device.
    Type: Application
    Filed: January 31, 2020
    Publication date: May 28, 2020
    Inventors: Hiroki MATSUI, Yuta KASHIWA, Seijiro OCHIAI, Takaaki IGUCHI
  • Patent number: 10594002
    Abstract: An embodiment provides a charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode, the charge voltage controller configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: March 17, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Hiroki Matsui, Yuta Kashiwa, Seijiro Ochiai, Takaaki Iguchi
  • Patent number: 10527681
    Abstract: It is an object of an embodiment to provide a degradation estimator for an energy storage device, configured to estimate degradation of the energy storage device, an energy storage apparatus, an input-output control device for the energy storage device, and a method for controlling input and output of the energy storage device. The embodiment includes estimating a temporary power decrease rate of the energy storage device in accordance with at least one of an average load, a maximum load, and a ?SOC obtained from detected current of the energy storage device and detected temperature of the energy storage device.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: January 7, 2020
    Assignee: GS YUASA INTERNATIONAL LTD.
    Inventors: Kazuki Furukawa, Hiroki Matsui, Seijiro Ochiai, Takaaki Iguchi
  • Publication number: 20180113174
    Abstract: It is an object of an embodiment to provide a degradation estimator for an energy storage device, configured to estimate degradation of the energy storage device, an energy storage apparatus, an input-output control device for the energy storage device, and a method for controlling input and output of the energy storage device. The embodiment includes estimating a temporary power decrease rate of the energy storage device in accordance with at least one of an average load, a maximum load, and a ?SOC obtained from detected current of the energy storage device and detected temperature of the energy storage device.
    Type: Application
    Filed: March 30, 2016
    Publication date: April 26, 2018
    Inventors: Kazuki FURUKAWA, Hiroki MATSUI, Seijiro OCHIAI, Takaaki IGUCHI
  • Publication number: 20180053971
    Abstract: An embodiment provides a charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode, the charge voltage controller configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode.
    Type: Application
    Filed: March 30, 2016
    Publication date: February 22, 2018
    Inventors: Hiroki MATSUI, Yuta KASHIWA, Seijiro OCHIAI, Takaaki IGUCHI
  • Patent number: 8968932
    Abstract: A compound having a high reduction resistance and being capable of sufficiently performing a function as an electronic conductive additive when added to a positive electrode active material as an electronic conductive additive is provided. In a method for producing a cobalt cerium compound including a step of depositing a hydroxide containing cobalt and cerium in an aqueous solution containing cobalt ions and cerium ions by changing the pH of the aqueous solution and thereafter performing a treatment of oxidizing the hydroxide, the ratio of the cerium ions contained in the aqueous solution containing the cobalt ions and the cerium ions is set to be more than 5% by atom and 70% by atom or less with respect to the sum of the cobalt ions and the cerium ions before the hydroxide is deposited.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: March 3, 2015
    Assignees: GS Yuasa International Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Masanori Morishita, Tadashi Kakeya, Seijiro Ochiai, Aki Nakashima, Yoshiteru Kawabe, Tetsuo Sakai
  • Publication number: 20120115034
    Abstract: A compound having a high reduction resistance and being capable of sufficiently performing a function as an electronic conductive additive when added to a positive electrode active material as an electronic conductive additive is provided. In a method for producing a cobalt cerium compound including a step of depositing a hydroxide containing cobalt and cerium in an aqueous solution containing cobalt ions and cerium ions by changing the pH of the aqueous solution and thereafter performing a treatment of oxidizing the hydroxide, the ratio of the cerium ions contained in the aqueous solution containing the cobalt ions and the cerium ions is set to be more than 5% by atom and 70% by atom or less with respect to the sum of the cobalt ions and the cerium ions before the hydroxide is deposited.
    Type: Application
    Filed: July 16, 2010
    Publication date: May 10, 2012
    Inventors: Masanori Morishita, Tadashi Kakeya, Seijiro Ochiai, Aki Nakashima, Yoshiteru Kawabe, Tetsuo Sakai
  • Patent number: 8057934
    Abstract: A nickel electrode for an alkaline secondary battery includes an electrically conductive base plate, and an active material particle supported on the conductive base plate and including a complex particle with a surface layer that mainly formed of a high-order cobalt compound whose oxidation number of cobalt is higher than +2 on a surface of a core layer particle that forms a high-order nickel hydroxide whose oxidation number of nickel is higher than +2. Lithium (Li) is contained to be a solid solution in the active material particle from 0.01 to 0.5 wt % of a converted amount as a lithium metal by weight of lithium metal divided by a total weight of the high-order nickel hydroxide, the high-order cobalt compound and the lithium metal.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: November 15, 2011
    Assignee: GS Yuasa International Ltd.
    Inventors: Masaki Miiyamoto, Mitsuhiro Kodama, Seijiro Ochiai, Manabu Kanemoto, Kaori Nishiyabu, Minoru Kuzuhara, Masaharu Watada
  • Patent number: 7635512
    Abstract: For accomplishing the subjects, the invention provides a nickel electrode material for use in a nickel electrode, wherein the positive-electrode material constituting the electrode material comprises: positive active material particles which comprise as the main component either a nickel hydroxide or a solid solution in a nickel hydroxide of one or more other elements and in which part of the nickel hydroxide has been oxidized; and a coating layer formed on the surface of the positive active material particles and comprising as the main component a high-order cobalt compound in which the cobalt has an oxidation number larger than 2, the average oxidation number of the nickel in the positive active material particles and the cobalt in the coating layer being from 2.04 to 2.40, and the positive-electrode material having a tap density of 2.0 g/cm3 or higher.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: December 22, 2009
    Assignee: Yuasa Corporation
    Inventors: Seijiro Ochiai, Mitsuhiro Kodama, Kengo Furukawa, Toshiki Tanaka, Minoru Kuzuhara, Masaharu Watada, Masahiko Oshitani
  • Patent number: 7527890
    Abstract: A sealed alkaline storage battery including a nickel electrode as a positive electrode, characterized by having the function of being capable of charge when the gas pressure in the battery and/or the battery temperature is not higher than a specified value and of being incapable of charge when the gas pressure in the battery and/or the battery temperature exceeds the specified value.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: May 5, 2009
    Assignee: Yuasa Corporation
    Inventors: Mitsuhiro Kodama, Seijiro Ochiai, Kouichi Sakamoto, Kaori Syodai, Masaki Miyamoto, Manabu Kanemoto, Yoshihiro Katayama, Minoru Kuzuhara, Masaharu Watada
  • Publication number: 20080166635
    Abstract: It provides a nickel electrode for an alkaline secondary battery and alkaline secondary battery that have a high discharge capacity, a small irreversible capacity, and also a superior cycle characteristic, high-rate discharge characteristics, and charge efficiency. Also, it provides a process for the production of a nickel electrode for an alkaline secondary battery that is superior in productivity.
    Type: Application
    Filed: December 16, 2005
    Publication date: July 10, 2008
    Inventors: Masaki Miyamoto, Mitsuhiro Kodama, Seijiro Ochiai, Manabu Kanemoto, Kaori Nishiyabu, Minoru Kuzuhara, Masaharu Watada
  • Publication number: 20060097701
    Abstract: A sealed alkaline storage battery including a nickel electrode as a positive electrode, characterized by having the function of being capable of charge when the gas pressure in the battery and/or the battery temperature is not higher than a specified value and of being incapable of charge when the gas pressure in the battery and/or the battery temperature exceeds the specified value.
    Type: Application
    Filed: January 29, 2004
    Publication date: May 11, 2006
    Applicant: Yusua Corporation
    Inventors: Mitsuhiro Kodama, Seijiro Ochiai, Kouichi Sakamoto, Kaori Syodai, Masaki Miyamoto, Manabu Kanemoto, Yoshihiro Katayama, Minoru Kuzuhara, Nasaharu Watada
  • Patent number: 6902848
    Abstract: A lithium battery excellent in initial capacity, high rate discharge performance, low temperature performance and cycle life performance can be provided without the necessity of any special production step. In other words, the present invention lies in a lithium battery having a power-generating element comprising at least a positive electrode, a negative electrode and a separator wherein a gel electrolyte comprising at least a polymer and a liquid electrolyte is used in at least a part of the power-generating element, characterized in that the concentration of lithium salt in the liquid electrolyte is from 1.5 to 5 mols per l of the liquid electrolyte.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: June 7, 2005
    Assignee: Yuasa Corporation
    Inventors: Syuichi Izuchi, Seijiro Ochiai, Hiroe Nakagawa, Toshiyuki Watanabe, Takaaki Kishi
  • Publication number: 20040241545
    Abstract: Subjects for the invention are to provide a nickel electrode material having a satisfactory tap density and capable of attaining a sufficient reduction in discharge reserve and a process for producing the nickel electrode material, and to provide a nickel electrode and an alkaline storage battery having a high capacity and excellent internal-pressure characteristics.
    Type: Application
    Filed: February 17, 2004
    Publication date: December 2, 2004
    Inventors: Seijiro Ochiai, Mitsuhiro Kodama, Kengo Furukawa, Toshiki Tanaka, Minoru Kuzuhara, Masaharu Watada, Masahiko Oshitani
  • Patent number: 6673496
    Abstract: A film-type lithium secondary battery in which at least one of a positive electrode (2), a negative electrode (3) and a separator (1) contains an electrolyte having a specified structure, the electrolyte having the above specified structure is composed of a liquid electrolyte and an organic polymer, the organic polymer is formed by polymerizing an organic monomer having a polymeric functional group at its molecular chain end, the organic polymer contains in its molecule a first chemical structure and a second chemical structure, the first chemical structure is at least one of an ethylene oxide structure and a propylene oxide structure, and the second chemical structure is at least one kind selected from among an alkyl structure, a fluoroalkyl structure, a benzene structure, an ether group and an ester group.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: January 6, 2004
    Assignee: Yuasa Corporation
    Inventors: Hiroe Nakagawa, Seijiro Ochiai, Syuichi Izuchi
  • Patent number: 6569572
    Abstract: In a lithium battery comprising a positive electrode, a negative electrode and a gel electrolyte; the gel electrolyte is composed of at least an ester-group or ether-group aprotic polar solvent, a lithium salt and a polymeric compound, and the polymeric compound comprises a polymer of at least one compound among those expressed by an equation (I) and an equation (II). (k: zero or number of 1 or more, m: number of 1 or more, R1:CpH2p, R2:CqH2q, p≠q, p & q: integer of 1 or more, A: CH2═CH—CO— or CH2═C(CH3)—CO—, X: n-valent combination group (n: integer ranging from 1 to 4), r: zero or number of 1 or more, s: number of 1 or more, R3: CtH2t, R4: CuH2u, t≠u, t & u: integer of 1 or more).
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: May 27, 2003
    Assignees: Yuasa Corporation, Mitsui Chemicals, Inc.
    Inventors: Seijiro Ochiai, Syuichi Izuchi, Takeshi Ishitoku, Masaharu Shindo, Hidenobu Nogi
  • Patent number: 6358646
    Abstract: A film-type lithium secondary battery, in which an electrolyte layer (13) composed only of an electrolyte integrated with an electrolyte in a cathode composite (11) is formed on a surface of the cathode composite (11) of a positive electrode (1), an electrolyte layer (23) composed only of an electrolyte integrated with an electrolyte in an anode composite (21) is formed on a surface of the anode composite (21) of a negative electrode (2), and the positive electrode (1) is opposed against the negative electrode (2) through the electrolyte layers (13 & 23).
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: March 19, 2002
    Assignee: Yuasa Corporation
    Inventors: Hiroe Nakagawa, Kazuya Okabe, Koji Itoh, Takashi Itoh, Seijiro Ochiai, Syuichi Izuchi