Patents by Inventor Keiichi Takahashi
Keiichi Takahashi 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: 20180183111Abstract: A positive electrode of a lithium-ion secondary battery contains first positive electrode active material particles and second positive electrode active material particles. The first positive electrode active material particles have a first composition represented by a compositional formula LiNix1Coy1Mnz1O2 (here, x1, y1, and z1 are numerical values satisfying 0<x1<1, 0<y1<1, 0.3<z1<0.5, and x1+y1+z1=1). The second positive electrode active material particles have a second composition represented by a compositional formula LiNix2Coy2Mnz2O2 (here, x2, y2, and z2 are numerical values satisfying 0<x2<1, 0<y2<1, 0<z2<0.2, and x2+y2+z2=1). The surface of at least one of the first positive electrode active material particles and the second positive electrode active material particles is coated with a transition metal oxide.Type: ApplicationFiled: December 11, 2017Publication date: June 28, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi TSUBOUCHI, Keiichi TAKAHASHI, Naoyuki WADA, Yukihiro OKADA
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Publication number: 20180159109Abstract: A positive electrode includes first positive electrode active material particles and second positive electrode active material particles. The first positive electrode active material particles include 0.1% by mass or more and 1% by mass or less of lithium carbonate and a first lithium transition metal oxide as a remainder. The first lithium transition metal oxide is represented by LiM1(1-z1)Mnz1O2 (0.05?z1?0.20). The second positive electrode active material particles include 0.01% by mass or more and 0.05% by mass or less of lithium carbonate and a second lithium transition metal oxide as a remainder. The second lithium transition metal oxide is represented by LiM2(1-z2)Mnz2O2 (0.40?z2?0.60). An electrolytic solution includes 1% by mass or more and 5% by mass or less of an overcharging additive and a solvent and a lithium salt as a remainder.Type: ApplicationFiled: November 21, 2017Publication date: June 7, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi TSUBOUCHI, Motoshi ISONO, Masaki KATO, Naoyuki WADA, Keiichi TAKAHASHI, Yukihiro OKADA, Tatsuya HASHIMOTO
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Patent number: 9964684Abstract: The present disclosure relates to a light emitting device that can improve design of emitted light. A communication substrate is provided with an LED indicator which emits light. A light guiding plate has a concave surface portion which is a concave surface to cover the LED indicator, and receives the light from the LED indicator using the concave surface portion. A storage case stores the communication substrate and the light guiding plate in a state where a part of the light guiding plate is exposed. The light guiding plate allows the light from the LED indicator to penetrate to a part of the light guiding plate exposed from the storage case by diffusing the light received using the concave surface portion. For example, the present disclosure is applicable to the light emitting device that emits light using an LED or the like.Type: GrantFiled: December 20, 2012Date of Patent: May 8, 2018Assignee: Saturn Licensing LLCInventors: Soichiro Nakamura, Hiroyasu Sato, Masao Kondo, Hirotaka Tako, Keiichi Takahashi, Shin Yamamoto, Ken Yano, Takanobu Wada, Kazuya Tateishi
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Publication number: 20180076450Abstract: A method of manufacturing a non-aqueous electrolyte solution secondary battery includes: (A) preparing a first composite material by mixing a first positive electrode active material, a first conductive material and a first binder; (B) preparing a second composite material by mixing a second positive electrode active material, a second conductive material and a second binder; and (C) manufacturing a positive electrode by forming a positive electrode composite layer including the first composite material and the second composite material. The first positive electrode active material has an average discharge potential lower than that of the second positive electrode active material. The first conductive material has a first OAN. The second conductive material has a second OAN. A ratio of the second OAN to the first OAN is 1.3 or more and 2.1 or less. A sum of the first OAN and the second OAN is 31.64 ml/100 g or less.Type: ApplicationFiled: August 14, 2017Publication date: March 15, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Koji TORITA, Tatsuya HASHIMOTO, Keiichi TAKAHASHI, Akihiro TANIGUCHI, Shuji TSUTSUMI, Yusuke FUKUMOTO, Yuji YOKOYAMA
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Patent number: 9876227Abstract: The sealed nonaqueous electrolyte secondary battery includes a nonaqueous electrolyte containing a gas generator that is decomposed to generate a gas when a prescribed battery voltage is exceeded, and a battery case that includes a current interrupt device that operates when the pressure within the battery case rises accompanying the gas generation. A positive electrode (10) has a positive electrode mixture layer (14) that contains at least a positive electrode active material (16). This positive electrode mixture layer (14) contains, as conductive agents, electroconductive carbon particles (18) and an expanded graphite (17) that has an average pore diameter of 0.2 ?m to 0.5 ?m.Type: GrantFiled: October 15, 2013Date of Patent: January 23, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yutaka Oyama, Keiichi Takahashi
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Publication number: 20170373352Abstract: Provided is a lithium ion secondary battery which has a low internal resistance in a low-SOC region and a sufficiently large amount of gas generated during overcharge. The lithium ion secondary battery disclosed herein includes an electrode body having a positive electrode and a negative electrode, and a nonaqueous electrolytic solution. The lithium ion secondary battery further includes a pressure-type safety mechanism. The nonaqueous electrolytic solution includes a gas generating agent. The positive electrode has a positive electrode active material layer including a positive electrode active material. The positive electrode active material includes a lithium transition metal composite oxide represented by LiNiaCobMncO2 wherein a, b and c satisfy the following conditions: 0.35?a?0.45, 0.15?b?0.25, 0.35?c?0.45, and a+b+c=1, and a lithium transition metal composite oxide represented by LiNixCoyMnzO2 wherein x, y and z satisfy the following conditions: 0.35?x?0.45, 0.45?y?0.55, 0.05?z?0.Type: ApplicationFiled: June 14, 2017Publication date: December 28, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideyuki SAKA, Yukihiro OKADA, Keiichi TAKAHASHI, Kaoru INOUE
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Publication number: 20170256788Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator. The positive electrode includes a positive electrode current collector, a first positive electrode mixture layer that is provided on the positive electrode current collector, and a second positive electrode mixture layer that is provided on the first positive electrode mixture layer. The first positive electrode mixture layer includes a first positive electrode active material and a first conductive material. The second positive electrode mixture layer includes a second positive electrode active material and a second conductive material. The first positive electrode active material includes a lithium composite oxide having a layered crystal structure. The second positive electrode active material includes a lithium composite oxide having an olivine-type crystal structure.Type: ApplicationFiled: September 8, 2015Publication date: September 7, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Keiichi TAKAHASHI, Shuji TSUTSUMI, Tatsuya HASHIMOTO
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Publication number: 20170256776Abstract: A positive electrode mixture layer (12) includes a first layer (12a) that has a main surface MS and a second layer (12b) formed closer to the positive electrode current collector (11) side than the first layer (12a). A ratio of the volume of the first layer (12a) to the volume of the positive electrode mixture layer (12) is 20 to 75 vol %. The first layer (12a) contains lithium iron phosphate (LFP) (1) and lithium nickel cobalt manganese composite oxide (NCM) (2). A ratio of the mass of the LFP (1) to the total mass of the LFP (1) and the NCM (2) in the first layer (12a) is more than 0 and 80 mass % or less. The second layer (12b) contains NCM (2). A ratio of the mass of the LFP (1) to the total mass of the positive electrode active material in the positive electrode mixture layer (12) is 7.5 to 20 mass %. A maximum pore size of the first layer (12a) is 0.50 to 0.70 ?m.Type: ApplicationFiled: September 2, 2015Publication date: September 7, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideyuki SAKA, Keiichi TAKAHASHI, Hideaki FUJITA, Tatsuya HASHIMOTO
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Patent number: 9698414Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode composite material layer containing first positive electrode active material particles containing a lithium nickel composite oxide, second positive electrode active material particles containing lithium iron phosphate, and a conductive material. A ratio of the second positive electrode active material particles in a total mass of the first positive electrode active material particles and the second positive electrode active material particles is not lower than 5 mass % and not higher than 20 mass %. A standard deviation ? representing distribution of an iron element satisfies a condition of 0.28???0.52 when distribution of the iron element is determined by conducting area analysis with an electron probe microanalyzer in a cross-section of the positive electrode composite material layer.Type: GrantFiled: April 22, 2015Date of Patent: July 4, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideyuki Saka, Hideaki Fujita, Keiichi Takahashi, Hideki Sano, Tatsuya Hashimoto
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Publication number: 20170162866Abstract: A non-aqueous secondary battery includes a positive electrode composite material layer. In a cross-section in a direction of thickness of the positive electrode composite material layer, the positive electrode composite material layer includes a first region including one end portion in a direction intersecting with the direction of thickness, a second region including the other end portion, and a third region lying between the first region and the second region. The first region is composed of a first composite material containing lithium iron phosphate and lithium nickel cobalt manganese composite oxide, and the second region is composed of a second composite material containing lithium iron phosphate and lithium nickel cobalt manganese composite oxide. The third region is composed of a third composite material containing lithium nickel cobalt manganese composite oxide.Type: ApplicationFiled: June 2, 2015Publication date: June 8, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideyuki SAKA, Keiichi TAKAHASHI, Hideaki FUJITA, Tatsuya HASHIMOTO
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Patent number: 9610552Abstract: A kneading apparatus has a housing and first and second rotary shafts mounted in the housing in parallel to one another for undergoing rotation about respective axes in opposite directions at unequal speeds to one another for kneading an object. The first and second rotary shafts have respective first and second stirring members arranged helically at a predetermined helical pitch and at predetermined angular pitch intervals, with the second stirring members being arranged with an inverse helix from that of the first stirring members. Side blocking plates disposed in the housing partially block the kneaded object and move it between the first and second rotary shafts. The side blocking plates are spaced apart from one another to provide a space above the first and second rotary shafts such that the kneaded object can pass through the space in the axial direction of the first and second rotary shafts.Type: GrantFiled: May 30, 2014Date of Patent: April 4, 2017Assignee: SHIN NICHINAN CO., LTD.Inventors: Yusuke Takemoto, Keiichi Takahashi, Takahiro Shibuya
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Publication number: 20170025715Abstract: A nonaqueous electrolyte secondary battery according to the present invention includes: an electrode body including a positive electrode including a positive-electrode active material layer; an external terminal connected to the electrode body; a nonaqueous electrolyte including a gas generant, and a current interrupt device. A content of the gas generant is at least 4 mass %. The positive-electrode active material layer includes, as a positive-electrode active material, a complex oxide containing' at least zirconium (Zr) and calcium (Ca) as constituent elements. When a sum total of metal elements, except metal that becomes a charge carrier, in the complex oxide is 100 mol % in terms of a mole percentage, the complex oxide contains Zr from 0.1 mol % to 0.5 mol % inclusive and Ca from 0.1 mol % to 0.3 mol % inclusive.Type: ApplicationFiled: March 5, 2015Publication date: January 26, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideyuki SAKA, Keiichi TAKAHASHI, Hideaki FUJITA
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Publication number: 20160204438Abstract: An electrode for a nonaqueous electrolyte secondary battery includes an electrode mixture layer. The electrode mixture layer contains a hollow active material particle and a needle-shaped filler having a through-hole that extends through the needle-shaped filler in a longitudinal direction. The needle-shaped filler is arranged on surfaces of the hollow active material particle.Type: ApplicationFiled: January 7, 2016Publication date: July 14, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Tatsuya HASHIMOTO, Naoyuki WADA, Keiichi TAKAHASHI, Koichi TORIYAMA
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Publication number: 20160172663Abstract: Provided is a non-aqueous electrolyte secondary battery combining high battery performance in normal use and endurance against overcharge. The non-aqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode comprises a positive electrode active material 16. Positive electrode active material 16 is formed of a particulate lithium composite oxide 16c comprising at least lithium, nickel, cobalt, manganese and tungsten; and a nickel oxide layer 16s formed on the lithium composite oxide surface. With the non-lithium metals in lithium composite oxide 16c being 100% by mole, tungsten accounts for 0.05% by mole or greater, but 2% by mole or less. With lithium composite oxide 16c being 100 parts by mass, the nickel oxide content is 0.01 part by mass or greater, but 2 parts by mass or less.Type: ApplicationFiled: December 4, 2015Publication date: June 16, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideyuki SAKA, Keiichi TAKAHASHI
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Publication number: 20150349329Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode composite material layer containing first positive electrode active material particles containing a lithium nickel composite oxide, second positive electrode active material particles containing lithium iron phosphate, and a conductive material. A ratio of the second positive electrode active material particles in a total mass of the first positive electrode active material particles and the second positive electrode active material particles is not lower than 5 mass % and not higher than 20 mass %. A standard deviation ? representing distribution of an iron element satisfies a condition of 0.28???0.52 when distribution of the iron element is determined by conducting area analysis with an electron probe microanalyzer in a cross-section of the positive electrode composite material layer.Type: ApplicationFiled: April 22, 2015Publication date: December 3, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideyuki SAKA, Hideaki FUJITA, Keiichi TAKAHASHI, Hideki SANO, Tatsuya HASHIMOTO
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Patent number: 9134313Abstract: A tumor marker comprising diacetylspermine, and a method of evaluating the state of a tumor, comprising reacting an antibody to diacetylspermine with a biological sample to thereby detect diacetylspermine and evaluating the state of the tumor using the obtained detection results as an indicator.Type: GrantFiled: June 9, 2009Date of Patent: September 15, 2015Assignees: Tokyo Metropolitan Organization For Medical Research, CRC Inc., Tokyo Metropolitan Government, Trans Genic Inc.Inventors: Masao Kawakita, Kyoko Hiramatsu, Keiichi Takahashi, Naotaka Hamasaki, Koji Yamaguchi, Tsunehisa Kaku, Koichiro Muta, Munechika Enjoji, Seiji Naito, Jun Hayashi, Shoshu Mitsuyama, Hiroyuki Yamashita, Toru Inoue, Masato Kato
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Publication number: 20150207134Abstract: A secondary battery includes an electrode body. The electrode body includes a positive electrode active material layer. The positive electrode active material layer includes a plurality of hollow positive electrode active material particles, a plurality of void supporting particles, and a plurality of conductive material particles. The void supporting particles are configured to provide voids having a pore diameter of 0.5 ?m or more in the positive electrode active material layer. The conductive material particles are configured to provide an electrical continuity of the positive electrode active material layer. A ratio of an average particle size of the void supporting particles to an average particle size of the hollow positive electrode active material particles is1/3 or more and 2 or less. The crushing strength of the void supporting particles is larger than the crushing strength of the conductive material particles.Type: ApplicationFiled: October 11, 2013Publication date: July 23, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyuki Mizuno, Yutaka Oyama, Keiichi Takahashi, Akihiro Taniguchi, Hideaki Fujita
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Publication number: 20150194664Abstract: Provided is a non-aqueous electrolyte secondary battery which exhibits excellent energy density and excellent input/output density (and especially output density in low SOC regions). This invention discloses a non-aqueous electrolyte secondary battery that includes a positive electrode, a negative electrode and a non-aqueous electrolyte. The positive electrode includes a positive electrode current collector and a positive electrode active material layers formed on the positive electrode current collector. The positive electrode active material layer has two regions that are demarcated in a surface direction of the positive electrode current collector, which are a first region 14a containing mainly a positive active material of lithium iron phosphate, and a second region 14b containing mainly a positive active material of a lithium-transition metal composite oxide.Type: ApplicationFiled: January 5, 2015Publication date: July 9, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideyuki SAKA, Hideaki FUJITA, Keiichi TAKAHASHI
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Publication number: 20150180033Abstract: The sealed nonaqueous electrolyte secondary battery includes a nonaqueous electrolyte containing a gas generator that is decomposed to generate a gas when a prescribed battery voltage is exceeded, and a battery case that includes a current interrupt device that operates when the pressure within the battery case rises accompanying the gas generation. A positive electrode (10) has a positive electrode mixture layer (14) that contains at least a positive electrode active material (16). This positive electrode mixture layer (14) contains, as conductive agents, electroconductive carbon particles (18) and an expanded graphite (17) that has an average pore diameter of 0.2 ?m to 0.5 ?m.Type: ApplicationFiled: October 15, 2013Publication date: June 25, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yutaka Oyama, Keiichi Takahashi
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Publication number: 20140354888Abstract: This disclosure relates to a connection device that can provide a new function for an electronic device. A film antenna receives a wireless signal transmitted by radio, a relay unit relays the received wireless signal to a television receiver, an LED indicator emits light based on a control signal transmitted from the television receiver, a storage case stores the film antenna, the relay unit and a light emitting unit, and a connection member connects the storage case to the television receiver. In addition, in a state of being connected to the television receiver, in a normal direction to a housing surface having a display unit on a housing of the television receiver, the storage case has a protruding section which further protrudes from the housing surface and stores the film antenna in the protruding section. For example, this disclosure can be applied to a receiving device having a receiving unit which receives the wireless signal.Type: ApplicationFiled: December 20, 2012Publication date: December 4, 2014Applicant: SONY CORPORATIONInventors: Soichiro Nakamura, Hiroyasu Sato, Shin Yamamoto, Hirotaka Tako, Keiichi Takahashi, Ken Yano, Shunsuke Kajiura