Patents Assigned to Hitachi Maxell Energy, Ltd.
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Publication number: 20140093761Abstract: There is provided a lithium secondary battery. The positive electrode includes a positive electrode mixture layer provided on one side or both sides of the current collector. The positive electrode active material includes a lithium-containing composite oxide including lithium and a transition metal. At least a part of the lithium-containing composite oxide includes nickel as transition metal. The non-aqueous electrolyte includes a halogen-substituted cyclic carbonate at a content of 0.5 to 5 mass %, when manufacturing the lithium secondary battery. The side part of the battery case includes two wide surfaces opposed to each other. The two wide surfaces are wider than the other surfaces in a side view. The side part has such a cleavable groove that is cleaved when an internal pressure of the battery exceeds a threshold. The cleavable groove is provided at a portion to intersect with a diagonal of the wide surfaces in the side view.Type: ApplicationFiled: November 1, 2012Publication date: April 3, 2014Applicant: HITACHI MAXELL ENERGY, LTD.Inventor: HITACHI MAXELL ENERGY, LTD.
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Publication number: 20130136988Abstract: [Objectives] The present invention provides a non-aqueous secondary battery in which a material containing Si and O as constituent elements is used in a negative electrode. The present invention provides a non-aqueous secondary battery having good charge discharge cycle characteristics, and suppressing the battery swelling associated with the charge and the discharge. Also, the present invention relates to a negative electrode that can provide the non-aqueous secondary battery. [Solution] The negative electrode includes a negative electrode active material, including a composite of a material containing Si and O as constitution elements (atom ratio x of O to Si is 0.5?x?1.5) in combination with a carbon material, and graphite. The graphite has an average particle diameter dg(?m) of 4 to 20 ?m. The material containing Si and O as constitution elements has an average particle diameter ds(?m) of 1 ?m or more. The ratio ds/dg (i.e., ds to dg) is 0.05 to 1.Type: ApplicationFiled: August 3, 2011Publication date: May 30, 2013Applicant: HITACHI MAXELL ENERGY, LTD.Inventors: Naokage Tanaka, Akira Inaba, Keiichiro Uenae, Masayuki Yamada, Kazunobu Matsumoto
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Publication number: 20130078509Abstract: A non-aqueous secondary battery contains a positive electrode, a negative electrode, a separator and a non-aqueous electrolytic solution. The positive electrode contains a layered structure lithium-containing compound oxide, or a spinel lithium-containing compound oxide containing manganese as an active material. The non-aqueous electrolytic solution contains at least one additive selected from a sulfonic acid anhydride, a sulfonate ester derivative, a cyclic sulfate derivative and a cyclic sulfonate ester derivative, and a vinylene carbonate or a derivative of the vinylene carbonate.Type: ApplicationFiled: November 19, 2012Publication date: March 28, 2013Applicant: HITACHI MAXELL ENERGY, LTD.Inventor: Hitachi Maxell Energy, Ltd.
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Publication number: 20130071758Abstract: The nonaqueous electrolyte for an electrochemical device of the present invention includes at least one selected from an imide compound represented by the general formula (1) and an imide compound represented by the general formula (2): where R1 is an organic residue or an F-containing organic residue, X1 and X2 are each H, F, an organic residue or an F-containing organic residue, and X1 and X2 may be the same or different from each other; and where R2 is an organic residue or an F-containing organic residue, and H of a benzene ring may be partially or entirely replaced with F.Type: ApplicationFiled: September 13, 2012Publication date: March 21, 2013Applicant: HITACHI MAXELL ENERGY, LTD.Inventors: Masayuki OYA, Mitsuhiro KISHIMI, Fusaji KITA
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Publication number: 20120321939Abstract: Provided is a flat battery with a molded gasket extending from the opening edge of the seal can to the flat portion, where the gasket may be prevented from exfoliating from the inner surface of the seal can. A flat battery (1) includes: a negative electrode can (10) (exterior can) shaped as a cylinder with a bottom; a positive electrode can (20) (seal can) having a peripheral wall (22) (cylinder portion) and a flat portion (21), the positive electrode can being disposed as an inverted dish with respect to the negative electrode can (10); and a gasket (30) molded at least on an inner surface of the positive electrode can (20), extending from the opening edge of the peripheral wall (22) to the flat portion (21).Type: ApplicationFiled: September 13, 2010Publication date: December 20, 2012Applicant: HITACHI MAXELL ENERGY, LTD.Inventors: Koji Yamaguchi, Toshihiko Ishihara
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Publication number: 20120276437Abstract: A flat nonaqueous secondary battery with improved reliability is provided. The flat nonaqueous secondary battery (1) includes an electrode assembly disposed in a space formed by an exterior case (2) and a seal case (3). The electrode assembly includes a plurality of positive electrodes (5) and a plurality of negative electrodes (6) alternately stacked upon each other and a separator (7). The separator (7) has a joint (7c) formed by welding together at least a portion of its periphery. When the separator (7) and the positive electrode (5) are measured along a cross section in their thickness direction, the ratio A/B of the shortest distance A between the end of the joint (7c) of the separator (7) facing the positive electrode (5) and the outer periphery of the positive electrode (5) sandwiched by the separator (7) to the thickness B of the positive electrode (5) is not smaller than 1.Type: ApplicationFiled: November 24, 2010Publication date: November 1, 2012Applicant: HITACHI MAXELL ENERGY, LTD.Inventors: Yuko Onishi, Toshikazu Yoshiba, Megumu Takai
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Patent number: 8221509Abstract: Sheet-shaped mixture layers are placed on both sides of a current collector to form an electrode (positive electrode) with a layered structure. The electrode with a layered structure and a counter electrode (negative electrode) thereof are wound via a separator, while a positional shift in a winding direction is caused between the current collector and the sheet-shaped mixture layers of the electrode with the layered structure, whereby a winding body is formed. The winding body is placed in a battery case (outer can) to constitute a battery. Particularly, in the electrode with a layered structure, by forming the current collector of a plain-woven wire net, a metal foil, expanded metal, a lath, or punching metal, a battery with satisfactory productivity suitable for an intermediate load can be provided at a low cost.Type: GrantFiled: May 20, 2009Date of Patent: July 17, 2012Assignee: Hitachi Maxell Energy, Ltd.Inventors: Ryoko Masuyoshi, Mitsutoshi Watanabe, Tetsuo Kawai, Toshiyuki Edamoto
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Patent number: 8216719Abstract: A non-aqueous secondary battery of the present invention includes a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode includes a positive electrode material mixture layer containing a lithium-containing transition metal oxide. The negative electrode includes a negative electrode material mixture layer and a porous layer containing an insulating material unreactive with lithium formed thereon. The negative electrode material mixture layer includes a negative electrode material including a core and a carbon covering layer covering a surface of the core. The core includes a material containing silicon and oxygen at an atomic ratio x of the oxygen to the silicon of 0.5?×?1.5. The material containing silicon and oxygen has a peak at least in a range of 1850 to 1860 eV in an X-ray absorption near edge structure spectrum at the K absorption edge of Si in a state in which discharge of the battery is finished.Type: GrantFiled: February 12, 2007Date of Patent: July 10, 2012Assignee: Hitachi Maxell Energy, Ltd.Inventors: Masayuki Yamada, Kazutaka Uchitomi, Qiao Shi, Hiroshi Fukunaga, Kazunobu Matsumoto
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Patent number: 8197954Abstract: A battery pack that allows a cover to be firmly fixed with a simple structure and that has superior impact resistance is provided. The battery pack is a battery pack 1 in which a protection circuit 10 and a protection element 7 are attached to a unit cell 2 and the protection circuit 10 and the protection element 7 are housed within a cover 11, the battery pack 1 including an internal frame 6 provided within the cover 11, wherein the internal frame 6 is fixed to the unit cell 2 and supports the protection circuit 10, a boss 13 projecting from the internal frame 6 which passes through a hole 12 formed in the cover 11, and the cover 11 is fixed to the internal frame 6 by melting and deforming the boss 13.Type: GrantFiled: October 23, 2008Date of Patent: June 12, 2012Assignee: Hitachi Maxell Energy, Ltd.Inventors: Tadayoshi Dobata, Hiroshi Yamamoto, Youg-hyun Shin, Rie Morisaki
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Patent number: 8153298Abstract: A positive electrode for an alkaline battery of the present invention includes a spinel-type manganese oxide as a positive electrode active material, wherein the spinel-type manganese oxide has a potential of 0.26 to 0.34 V with respect to a Hg/HgO reference electrode, and the content of the spinel-type manganese oxide in the entire positive electrode active material is not less than 30 mass %. Further, an alkaline battery of the present invention includes the above-described positive electrode for an alkaline battery of the invention, a negative electrode and an electrolyte.Type: GrantFiled: August 7, 2008Date of Patent: April 10, 2012Assignee: Hitachi Maxell Energy, Ltd.Inventors: Shinichi Iwamoto, Yoshihisa Hirose
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Patent number: 8137840Abstract: A nonaqueous secondary battery containing a positive electrode having a positive electrode mixture layer, a negative electrode, and a nonaqueous electrolyte, in which the positive electrode comprises, as active materials, three or more lithium-containing transition metal oxides having different average particle sizes, those transition metal oxides comprise a transition metal element, the transition metal element of the transition metal oxide having the smallest average particle size is partially substituted with a metal element other than the transition metal element, and the density of the positive electrode mixture layer is t 3.8 g/cm3 or more.Type: GrantFiled: March 27, 2007Date of Patent: March 20, 2012Assignee: Hitachi Maxell Energy, Ltd.Inventors: Fusaji Kita, Hideki Tsubata, Hiroyasu Inoue
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Publication number: 20110318631Abstract: The electrochemical device of the present invention comprises a positive electrode (2), a negative electrode (1), a nonaqueous electrolyte and a separator (3). The separator (3) includes a porous layer (I) composed of a microporous film composed predominantly of a thermoplastic resin and a porous layer (II) containing a filler having a heat-resistant temperature of 150° C. or higher as the main component. The negative electrode (1) contains graphite having an R value of 0.1 to 0.5 and d002 of 0.338 nm or less as a negative electrode active material, where the R value is a ratio of a peak intensity at 1360 cm?1 to a peak intensity at 1580 cm?1 in an argon ion laser Raman spectrum and the d002 is a lattice spacing between 002 planes. The ratio of the graphite to the negative electrode active material is 30 mass % or more, and the nonaqueous electrolyte contains vinyl ethylene carbonate or a derivative thereof, or a dinitrile compound or acid anhydride.Type: ApplicationFiled: March 12, 2010Publication date: December 29, 2011Applicant: HITACHI MAXELL ENERGY, LTD.Inventors: Hirokazu Nomura, Akira Yamashita, Fusaji Kita
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Patent number: 8043740Abstract: The flat-shaped battery includes an electrode material containing an active material, and a battery case which has the electrode material housed inside and in which a plurality of protruding members extending inwardly from an inner surface of the battery case are fixed to the inner surface. The electrode material is housed in the battery case with those individual protruding members inserted in the electrode material. As a result, even if the flat-shaped battery is subjected to such external influences as accelerations and vibrations, the electrode material can securely be prevented from moving within the battery case.Type: GrantFiled: March 18, 2008Date of Patent: October 25, 2011Assignee: Hitachi Maxell Energy, Ltd.Inventors: Noriyuki Yabushita, Koji Yamaguchi, Toshikazu Yoshiba
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Patent number: 8021793Abstract: A hydrogen producing apparatus according to the present invention includes a hydrogen-generating-material containing vessel 1 for containing a hydrogen generating material, a water containing vessel 2 for containing water, a water supply portion for supplying water from the water containing vessel 2 to the hydrogen-generating-material containing vessel 1, a hydrogen outflow portion for leading out hydrogen from the hydrogen-generating-material containing vessel 1, a gas-liquid separating part 7 for separating water from a mixture of hydrogen and water discharged from the hydrogen-generating-material containing vessel 1, and a water collecting portion for collecting water separated by the gas-liquid separating part 7 into the water containing vessel 2.Type: GrantFiled: October 30, 2006Date of Patent: September 20, 2011Assignee: Hitachi Maxell Energy, Ltd.Inventors: Toshihiro Nakai, Hiroshi Kashino, Takeshi Miki, Shoji Saibara
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Patent number: 8007691Abstract: A catalyst for electrodes in solid-polymer fuel cells which comprises metal oxide particles themselves. The catalyst contains fine transition-metal oxide particles having, in the main phase, a perovskite structure represented by the general formula ABO3 (wherein A represents one or more elements selected among lanthanum, strontium, cerium, calcium, yttrium, erbium, praseodymium, neodymium, samarium, europium, silicon, magnesium, barium, niobium, lead, bismuth, and antimony; and B represents one or more elements selected among iron, cobalt, manganese, copper, titanium, chromium, nickel, and molybdenum), the fine oxide particles having lattice constants satisfying the following relationship (1): 1.402<2b/(a+c)<1.422??(1) wherein a and c represent the minor-axis lengths of the perovskite type crystal lattice and b represents the major-axis length thereof.Type: GrantFiled: June 12, 2007Date of Patent: August 30, 2011Assignees: Hitachi Maxell Energy, Ltd., Toyota Jidosha Kabushiki KaishaInventors: Yuko Sawaki, Mikio Kishimoto, Haruyuki Nakanishi, Shigeaki Murata, Masahiro Imanishi, Shinichi Matsumoto
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Patent number: 8003247Abstract: A button-type alkaline battery in which an anode 3 containing an anode active material and an alkaline electrolyte is disposed in a sealed space formed by sealing a cathode housing 4 with an anode sealing member 5, with a gasket 6 being interposed between the cathode housing 4 and the anode sealing member 5. The anode active material includes mercury-free zinc or a mercury-free zinc alloy. The button-type alkaline battery includes a metal layer 7 that is disposed between and in contact with the anode sealing member 5 and the anode 3. The metal layer 7 includes a base material containing zinc, and at least one metal M selected from the group consisting of indium, bismuth, and tin, with the metal M having segregated in the base material.Type: GrantFiled: March 29, 2005Date of Patent: August 23, 2011Assignee: Hitachi Maxell Energy, Ltd.Inventors: Hiromi Tamakoshi, Hisanori Sugahara, Yoshihisa Hirose, Minoru Ichijo, Kiyoshi Sato
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Patent number: 7989100Abstract: A sealed prismatic battery according to the present invention comprises a laterally long cap sealing an opening of an upper surface of a battery can and a safety vent placed on the cap and having a thin-walled valve body which opens in an abnormal rise of a battery internal pressure. The safety vent has an oval-shaped circumferential groove formed inside an oval-shaped coining section provided on an outer surface of the cap and on one end side in a lateral direction of the cap and a thin-walled valve body surrounded thereby, and the oval-shaped circumferential groove is composed of lateral side sections parallel to the lateral direction of the cap and circular arc sections connecting these lateral side sections, with one lateral side section, other lateral side section, and the thin-walled valve body of the safety vent respectively having a thickness increased in this order.Type: GrantFiled: September 12, 2006Date of Patent: August 2, 2011Assignee: Hitachi Maxell Energy, Ltd.Inventors: Yoshimi Matsumoto, Osamu Watanabe, Yoshiki Somatomo