Patents Assigned to Yuasa Corporation
  • Patent number: 5547779
    Abstract: A separator for alkali-zinc battery comprising a microporous membrane having alkali resistance, a part of the porous membrane having highly persistent hydrophillic property and the remaining part having water repellent property. In the part having hydrophillic property, precipitation of ZnO can be controlled sufficiently because of its large persistency of hydrophilic property so that dendrite short-circuiting in the battery can be prevented satisfactorily. In the part having water repellent property, O.sub.2 gas is permeable well through it so that a decrease in capacity of battery can be avoided.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: August 20, 1996
    Assignee: Yuasa Corporation
    Inventors: Tomonori Kishimoto, Mitsuo Yamane, Takehito Bogauchi, Yoshihiro Eguchi
  • Patent number: 5547780
    Abstract: This invention provides a battery precursor for producing a battery through a cutting process, in which a large number of battery elements comprising positive active material layers, separators having electrolytes and negative active material layers are installed in parallel between a plate-like positive current collector plate and a negative current collector plate facing each other, and the respective battery elements are partitioned each other and sealed by insulators. According to this battery precursor, a battery having a voluntary shape can be obtained easily by cutting only.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: August 20, 1996
    Assignee: Yuasa Corporation
    Inventors: Hiroshi Kagawa, Shiro Kato, Kazuo Murata
  • Patent number: 5527639
    Abstract: A galvanic cell is in which at least one of the negative electrode, the positive electrode and the separator comprises a solid electrolyte prepared by doping an ionic compound to an organic polymer. The organic polymer is a polymer obtained by crosslinking an organic compound having a structure of the general formula (I):Z-[(A).sub.m -(E).sub.p -Y].sub.k (I)where Z is a residue of a compound containing at least one active hydrogen; A is represented by the following formula (II) ##STR1## wherein n is an integer of 0 to 25 and R is an alkyl having 1 to 20 carbon atoms, alkenyl, aryl or alkylaryl; E is at least one of --(R.sup.2 O)--, R.sup.2 being an alkylene having two or more carbon atoms; Y is an active hydrogen or a polymerizable functional group; k is an integer of 1 to 12; m is an integer of 1 to 250; p is an integer of 1 to 450; and A is copolymerized with E. When E is --(CH.sub.2 CH.sub.2 O)--, A and E are random-copolymerized, but when E comprises --(R.sub.2 O)-- in which R.sup.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: June 18, 1996
    Assignees: Dai-Ichi Kogyo Seiyaku Co., Ltd., Yuasa Corporation
    Inventors: Tomohiko Noda, Shyuiti Izuti, Hiroshi Imachi, Kazunari Takeda, Michiyuki Kono, Kenji Motogami, Shigeo Mori
  • Patent number: 5521024
    Abstract: A lead acid storage battery has a cell composed of a positive plate comprising a positive active material layer and a positive current collector plate, a negative plate comprising a negative active material layer and a negative current collector plate, a separator and a frame-shaped gasket. In the cell, the positive plate and the negative plate are laminated with the gasket put between them. The gasket is in contact with peripheral edges of the positive current collector plate and the negative current collector plate. The positive active material layer and the negative active material layer are located in a cell space surrounded by both of the plates and the gasket with the separator put between them.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: May 28, 1996
    Assignee: Yuasa Corporation
    Inventors: Masaaki Sasaki, Masahiro Arakawa, Tohru Horii, Kazuo Murata
  • Patent number: 5516602
    Abstract: An exhaust structure of this invention is composed of plural exhaust structure elements which are installed in a cover and arranged in horizontal positions facing on cell chambers. The exhaust structure element is provided with a gas intake chamber, a refluxing chamber and a passage chamber. The gas intake chamber connects to the refluxing chamber through a first slit, and the refluxing chamber connects to the passage chamber through a second slit. A baffle plate is installed in the gas intake chamber, pin-shaped bodies are installed on ceilings of the refluxing chamber and the passage chamber, a refluxing hole is made on a bottom surface of the refluxing chamber, and the refluxing hole connects to a cylindrical body. Bottom surfaces of the refluxing chamber and the passage chamber are slanted toward the refluxing hole.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: May 14, 1996
    Assignee: Yuasa Corporation
    Inventor: Sachio Uemichi
  • Patent number: 5506070
    Abstract: A metal hydride electrode, in which a metallic cobalt powder is mixed, within a mixing range of 3 to 20 weight percents, with a hydrogen absorbing alloy powder formed by substituting a part of Ni of alloy expressed by a rational formula of MmNi.sub.5 with Al and at least one kind of Fe, Cu, Co, Mn, and the mixed powder is loaded in a porous alkaline-proof metal body. An nickel electrode, in which a cobalt monoxide powder is mixed with an active material powder within a mixing range of 5 to 15 weight percents, the active material powder comprising zinc existing within a range of 2 to 8 weight percents, under a solid solution state in a crystal of nickel hydroxide powder assuming a spherical shape including an inner pore volume of 0.14 ml/g or less, and the mixed powder is loaded in a porous alkaline-proof metal body.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: April 9, 1996
    Assignee: Yuasa Corporation
    Inventors: Hiroyuki Mori, Keiichi Hasegawa, Masaharu Watada, Masahiko Oshitani
  • Patent number: 5500177
    Abstract: A manufacturing method for a battery cover, in which plural molds are used for forming a space corresponding to a shape of the cover, the tab terminals are disposed in the space, synthetic resin is filled in the space to embed the tab terminals, characterized by that plural pieces made of the same material as the filled synthetic resin are installed with distances left between them on both surfaces of embedded portions of the tab terminals, and the tab terminals are disposed in the space under this state.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: March 19, 1996
    Assignees: Yuasa Corporation, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Sachio Uemichi, Shuji Takahashi
  • Patent number: 5498496
    Abstract: A battery of this invention is equipped with a positive electrode having a following structure. A resin sheet is bonded to one side or both sides of a metal sheet, a large number of through holes are made at least on the resin sheet, and an active material is filled in the through holes.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: March 12, 1996
    Assignee: Yuasa Corporation
    Inventors: Masaaki Sasaki, Tohru Horii, Masahiro Arakawa, Kazuo Murata
  • Patent number: 5496656
    Abstract: A battery equipped with a cathode composite (2), an anode composite or an anode (4), an electrolyte layer (3) and a sealing material (6); characterized by that a material such as an element belonging to VIII-group of periodic table such as palladium etc., for example, is included in an inside of the battery. Gas produced in the battery inside is absorbed to the above material or added to a residual reactive double bond in an ion-conductive high-molecular compound by the above material, so that a rise of battery inside pressure due to gas is restrained and expansion and bursting of the battery are thus prevented.
    Type: Grant
    Filed: February 7, 1994
    Date of Patent: March 5, 1996
    Assignee: Yuasa Corporation
    Inventors: Tokuo Inamasu, Kazunari Takeda, Syuichi Izuchi, Youetsu Yoshihisa
  • Patent number: 5489314
    Abstract: A method for forming a nickel plate or a method for making up an alkaline battery, in such a way that cobalt oxyhydroxide is previously formed on surfaces of positive active material powder and used therefor, by mixing the positive active material powder with CoO powder, for example, to be oxidized, by oxidizing the positive active material powder in a solution including cobalt ions, or by mixing the positive active material powder with cobalt oxyhydroxide powder. A conductive network comprising the cobalt oxyhydroxide is formed, so that conductive efficiencies between the positive active materials and the positive active material and the substrate are made better.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: February 6, 1996
    Assignee: Yuasa Corporation
    Inventors: Takehito Bogauchi, Tomonori Kishimoto, Hiroe Nakagawa, Yoshihiro Eguchi, Mitsuo Yamane
  • Patent number: 5485744
    Abstract: A sulfuric acid concentration sensor for a lead storage battery comprising a quartz resonator changing its characteristic frequency in a manner of single-valued function according to the change of sulfuric acid concentration and an oscillation circuit (20) oscillating the quartz resonator, the quartz resonator is immersed in an electrolyte (6) so as to be oscillated, and a characteristic frequency of the quartz resonator at this moment is obtained so as to determine the sulfuric acid concentration. The sensor of this invention is compact in its size, simple in its structure and cheap in its cost, so that it can be applied to a lead storage battery for automobile.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: January 23, 1996
    Assignees: Tadamasa Akutagawa, Yuasa Corporation
    Inventors: Tadamasa Akutagawa, Shigeru Sano
  • Patent number: 5458766
    Abstract: A life indicator is so designed that an electric current flows to a light emitting diode utilizing a battery as a power source when two electrodes are electrically connected. The two electrodes are so installed as to be electrically connected by passing water through a water passage communicating with an objective equipment, and the discharge life of the battery is set equal to the service life of the equipment.
    Type: Grant
    Filed: September 8, 1993
    Date of Patent: October 17, 1995
    Assignee: Yuasa Corporation
    Inventors: Katuo Ehara, Tadashi Okutoh, Aya Nishino, Shigeru Sano
  • Patent number: 5443927
    Abstract: This invention relates to a cathode composite for use in a primary battery and a secondary battery. In order to disperse uniformly a positive active material and a conductive agent in the cathode composite, the cathode composite is characterized by that it includes a compound having a pyridine ring in its molecular structure which will become a polar molecule, and functioning as a dispersant.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: August 22, 1995
    Assignee: Yuasa Corporation
    Inventors: Yasumasa Nakajima, Syuichi Izuchi, Hiroshi Imachi, Hiroyuki Fukutome
  • Patent number: 5437804
    Abstract: A solid polymer electrolyte which has excellent heat resistance and high mechanical strength is prepared by incorporating an alkali metal salt or an alkaline earth metal salt into polyvinyl alcohol. The electrolyte can further contain a polar solvent and/or polyether to provide an elevated ionic-conductivity.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: August 1, 1995
    Assignee: Yuasa Corporation
    Inventor: Takakazu Yamamoto
  • Patent number: 5437942
    Abstract: A lithium secondary battery includes a positive electrode, an electrolyte layer having a solid polymer electrolyte, and a negative electrode using metallic lithium or lithium alloy as an active material. The electrolyte layer includes a first layer and a second layer, and an electrolyte of the first layer in contact with the negative electrode is less reactive with a negative active material than to an electrolyte of the second layer.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: August 1, 1995
    Assignee: Yuasa Corporation
    Inventors: Kazuo Murata, Youetsu Yoshihisa, Kazunari Takeda, Syuichi Izuchi
  • Patent number: 5431701
    Abstract: A method for manufacturing a film type battery equipped with a generating element composed of a positive active material, an electrolyte and a negative active material placed one upon another in a layer structure. In order to enable easy mass-production of the film type battery having the above structure, the manufacturing method includes the steps of installing sealing agent layers on a surface of a positive current collector plate and placing the component materials of the generating element i.e. the positive active material, the electrolyte and the negative active material to through holes of the sealing agent layers.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: July 11, 1995
    Assignee: Yuasa Corporation
    Inventors: Hiroshi Kagawa, Shiro Kato, Kazuo Murata
  • Patent number: 5420497
    Abstract: A direct current power unit has main and secondary direct current power supplies, a serial circuit, and first and second parallel circuits. One terminal of the secondary direct current power is connected to one terminal of the main direct current power supply. The serial circuit consists of a choke coil and a first capacitor, of which each terminal is connected to each terminal of the main direct current power supply. The first parallel circuit consists of a first diode and a first switching element, of which each terminal is connected to each terminal of the first capacitor. The second parallel circuit consists of a second capacitor, a second diode, and a second switching element connected between the serial connected point of the choke coil and the first capacitor and the other terminal of the secondary direct current power supply. Each terminal of a third capacitor is connected to each terminal of the secondary direct current power supply.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: May 30, 1995
    Assignee: Yuasa Corporation
    Inventors: Gunji Kimura, Osawa Hiroshi, Shigeru Sano
  • Patent number: 5401595
    Abstract: A film type battery including a positive current collector plate, a positive active material, electrolytes, a negative active material and a negative current collector plate laminated into a layer structure, wherein the positive active material, the negative active material and the electrolytes are peripherally sealed, the positive current collector plate and the negative current collector plate are integrated by sealing agents, a portion of the positive current collector plate and a portion of the negative current collector plate are not contacted by the active material, the electrolytes or the sealing agents, a positive terminal piece is fitted to the positive current collector plate at a side of the layer structure and a negative terminal piece is fitted to the negative current collector plate at the side of the layer structure.
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: March 28, 1995
    Assignee: Yuasa Corporation
    Inventors: Hiroshi Kagawa, Shiro Kato, Kazuo Murata
  • Patent number: 5393616
    Abstract: A metal hydride electrode, in which a metallic cobalt powder is mixed, within a mixing range of 3 to 20 weight percents, with a hydrogen absorbing alloy powder formed by substituting a part of Ni of alloy expressed by a rational formula of MmNi.sub.5 with Al and at least one kind of Fe, Cu, Co, Mn, and the mixed powder is loaded in a porous alkaline-proof metal body. An nickel electrode, in which a cobalt monoxide powder is mixed with an active material powder within a mixing range of 5 to 15 weight percents, the active material powder comprising zinc existing within a range of 2 to 8 weight percents, under a solid solution state in a crystal of nickel hydroxide powder assuming a spherical shape including an inner pore volume of 0.14 ml/g or less, and the mixed powder is loaded in a porous alkaline-proof metal body.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: February 28, 1995
    Assignee: Yuasa Corporation
    Inventors: Hiroyuki Mori, Keiichi Hasegawa, Masaharu Watada, Masahiko Oshitani
  • Patent number: 5378557
    Abstract: In a film type battery comprising a generating element which is formed by laminating a negative active material, an electrolyte and a positive active material into a layer shape, (1, 2, 3), terminal plates (5, 6) which are installed on and under the generating element and serve also as a current collector and a container, and a frame-shaped sealing material (4) which is installed on peripheral edges of the terminal plates, seals the generating element in between the both terminal plates and insulates one terminal plate from the other; the sealing material is improved. For example, the sealing material is formed into a vertical-type multi-layer structure, in which at least one layer is composed of a layer (41, 42) comprising metal and the other layer (43) is composed of an electric insulator. Thereby, a mechanical strength of the sealing material or a battery becomes large and the battery becomes hard to be bent.
    Type: Grant
    Filed: April 7, 1993
    Date of Patent: January 3, 1995
    Assignee: Yuasa Corporation
    Inventors: Kazuo Murata, Kenichi Takeuchi, Syuichi Izuchi, Shiro Kato