Patents by Inventor Naoyuki Wada
Naoyuki Wada 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: 20190036110Abstract: A lithium ion secondary battery includes at least a positive electrode, a negative electrode, and an electrolyte. The positive electrode contains at least a first positive electrode active material and a second positive electrode active material. The first positive electrode active material is expressed with a formula (I) LiNiaCobMncO2 and the second positive electrode active material is expressed with a formula (II) LiNidCoeMnfO2, where a, b, c, d, e, and f satisfy conditions of a>d, 0.4?a?0.6, 0.2?b?0.5, 0.1?c?0.2, a+b+c=1.0, 0.2?d?0.5, 0.1?e?0.2, 0.4?f?0.6, and d+e+f=1.Type: ApplicationFiled: June 18, 2018Publication date: January 31, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryo HANAZAKI, Keiichi TAKAHASHI, Naoyuki WADA, Yukihiro OKADA
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Patent number: 10050256Abstract: A method of manufacturing a positive electrode includes: preparing a current collector foil having a first main surface and a second main surface; obtaining a granulated body in which a solvent remains by mixing a positive electrode active material, a conductive material, a binder, and the solvent with each other to obtain a mixture and granulating the mixture; obtaining a first positive electrode mixture layer by pressing the granulated body into a sheet shape; arranging the first positive electrode mixture layer on the first main surface; and heating the current collector foil in a state where the first positive electrode mixture layer is arranged on the first main surface, such that a temperature of the current collector foil becomes a softening point of the current collector foil or higher and that a temperature of the first positive electrode mixture layer is lower than a melting point of the binder.Type: GrantFiled: November 19, 2015Date of Patent: August 14, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya Umeyama, Naoyuki Wada, Tatsuya Hashimoto, Naoto Onodera
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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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Publication number: 20180135172Abstract: Provided is a susceptor, capable of preventing occurrence of deep scratches on the back surface and beveled part of a wafer attributable to contact with lift pins or the susceptor, and reducing dust generation from the susceptor. A susceptor according to one embodiment of this disclosure includes a susceptor main body, and arc-shaped members. The bottom surface of a counterbore part is constituted of the entire front surfaces of the arc-shaped susceptor members, and a part of the front surface of the susceptor main body. When a wafer is conveyed, the entire front surfaces of the arc-shaped members ascended by lift pins support only the outer circumferential part of the back surface of the wafer by surface contact.Type: ApplicationFiled: April 22, 2016Publication date: May 17, 2018Applicant: SUMCO CORPORATIONInventors: Shoji NOGAMI, Naoyuki WADA
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Patent number: 9960411Abstract: A method of manufacturing a negative electrode for a nonaqueous electrolyte secondary battery includes: preparing a copper foil having a first main surface and a second main surface that are opposite sides of the copper foil; obtaining a granulated body by mixing a negative electrode active material, a thickener, a binder, and a solvent with each other to obtain a mixture and by granulating the mixture; obtaining a first negative electrode mixture layer by pressing the granulated body; arranging the first negative electrode mixture layer on the first main surface; and softening the copper foil by bringing the second main surface into contact with a heated roller in a state where the first negative electrode mixture layer is arranged on the first main surface. A temperature of the heated roller is a recrystallization temperature of the copper foil or higher.Type: GrantFiled: November 17, 2015Date of Patent: May 1, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya Umeyama, Naoto Onodera, Naoyuki Wada, Yusuke Fukumoto, Tatsuya Hashimoto, Yuji Yokoyama
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Publication number: 20180100235Abstract: Provided is a susceptor, capable of preventing occurrence of scratches on the back surface of a wafer attributable to lift pins, and reducing unevenness of the in-surface temperature distribution of the wafer. A susceptor according to one embodiment of this disclosure has a susceptor main body and a plate-shaped member, and when a wafer is conveyed, the front surface of the plate-shaped member ascended by lift pins supports the central part of the back surface of the wafer by surface contact. A separation space between the plate-shaped member and the susceptor main body, in a state in which the plate-shaped member is placed on the recessed part, enters further into the central side of the plate-shaped member, in a direction from the front surface to the back surface of the susceptor.Type: ApplicationFiled: April 22, 2016Publication date: April 12, 2018Applicant: SUMCO CORPORATIONInventors: Shoji NOGAMI, Naoyuki WADA, Masaya SAKURAI, Takayuki KIHARA
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Patent number: 9929406Abstract: A nonaqueous electrolyte secondary battery includes: a negative electrode current collector foil; and a negative electrode mixture layer that is arranged on the negative electrode current collector foil. The negative electrode mixture layer contains a plurality of granulated particles. Each of the granulated particles contains a negative electrode active material and a coating film. The coating film is formed on a surface of the negative electrode active material. The coating film includes a first film and a second film. The first film is formed on the surface of the negative electrode active material. The second film is formed on the first film. The first film contains a carboxymethyl cellulose polymer. The second film contains a polyacrylic acid polymer.Type: GrantFiled: November 13, 2015Date of Patent: March 27, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya Umeyama, Tatsuya Hashimoto, Naoyuki Wada, Yusuke Fukumoto, Naoto Onodera, Yuji Yokoyama
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Patent number: 9911972Abstract: The non-aqueous electrolyte secondary battery 10 provided by the present invention comprises a positive electrode 30, a negative electrode 50 and a non-aqueous electrolyte. The negative electrode 50 includes a negative electrode current collector 52 and a negative electrode active material layer 54 formed on the current collector 52, the negative electrode active material layer 54 containing a negative electrode active material 55 capable of storing and releasing charge carriers and having shape anisotropy so that the charge carriers are stored and released along a predefined direction. The negative electrode active material layer 54 includes, at a bottom thereof contacting the current collector 52, a minute conductive material 57 with granular shape and/or minute conductive material 57 with fibrous shape having an average particle diameter that is smaller than that of the negative electrode active material 55, and includes, at the bottom thereof; a part of the negative electrode active material 55.Type: GrantFiled: December 14, 2011Date of Patent: March 6, 2018Assignee: Toyota Jidosha Kabushiki KaishaInventors: Koji Takahata, Tatsuya Hashimoto, Yoshiyuki Ozaki, Yukihiro Okada, Kenji Tsuchiya, Masanori Kitayoshi, Naoyuki Wada
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Patent number: 9905846Abstract: A lithium ion secondary battery includes: an electrode mixture layer that contains an electrode active material and an organic ferroelectric having a dielectric constant of 25 or higher; and an electrolytic solution that contains lithium bis(fluorosulfonyl)imide and a nonaqueous solvent. A content of the organic ferroelectric is 0.5 parts by mass to 10 parts by mass with respect to 100 parts by mass of the electrode active material. A proportion of a high-polarity solvent having a dielectric constant of 10 or higher in the nonaqueous solvent is 10 vol % or lower.Type: GrantFiled: March 4, 2016Date of Patent: February 27, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya Umeyama, Naoto Onodera, Naoyuki Wada, Yusuke Fukumoto, Tatsuya Hashimoto, Yuji Yokoyama, Hideki Sano
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Publication number: 20170358792Abstract: A method of manufacturing a nonaqueous electrolyte secondary battery includes: a kneading step of kneading a carbon-based negative electrode active material, a binder, and a sugar alcohol with each other to form a negative electrode mixture paste; and an application step of applying the negative electrode mixture paste to a negative electrode current collector to form a negative electrode mixture layer.Type: ApplicationFiled: December 18, 2015Publication date: December 14, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Yuji YOKOYAMA, Naoyuki WADA, Yusuke FUKUMOTO, Tatsuya HASHIMOTO
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Publication number: 20170309945Abstract: A flat-plate portion of a negative electrode composite material layer includes a first end portion at one end portion in a direction of axis of winding of a flat electrode winding assembly, a second end portion located opposite to the first end portion, and a central portion lying between the first end portion and the second end portion. The flat-plate portion of the negative electrode composite material layer is provided with a plurality of communication grooves. The communication groove includes a first terminal end portion at the first end portion, includes a second terminal end portion at the second end portion, includes in the central portion, a starting portion located closer to a bottom portion of a prismatic case relative to the first terminal end portion and the second terminal end portion, and extends from the starting portion toward the first terminal end portion and the second terminal end portion.Type: ApplicationFiled: August 31, 2015Publication date: October 26, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Tatsuya HASHIMOTO, Naoyuki WADA, Yusuke FUKUMOTO, Yuji YOKOYAMA
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Patent number: 9761860Abstract: Disclosed is a secondary battery capable of preventing damage to a current interrupt device caused by generation and transmission of vibration, and thereby achieving prevention of malfunction of the current interrupt device, and improvement of quality of the secondary battery. In addition, disclosed is a method of manufacturing the secondary battery. Specifically disclosed is a secondary battery, in which a positive electrode terminal is placed on the upper face of a sealing plate, a holder is placed on the lower face of the sealing plate, and the sealing plate is joined to the positive electrode terminal and the holder by a rivet. The secondary battery includes an adhered portion for adhering the holder to the sealing plate.Type: GrantFiled: January 28, 2015Date of Patent: September 12, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kosuke Nakamura, Naoyuki Wada, Ichiro Murata, Yukihiro Okada
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Patent number: 9761853Abstract: Provided is a non-aqueous electrolyte secondary battery in which an increase in resistance is suppressed when high rate pulsed charging and discharging is repeatedly carried out. The non-aqueous electrolyte secondary battery provided by the present disclosure is provided with: a positive electrode; a negative electrode; a separator; and a non-aqueous electrolyte solution. The separator is provided with a separator base made of a non-woven fabric; a first resin layer provided on a surface of the separator base that faces the positive electrode; and a second resin layer provided on a surface of the separator base that faces the negative electrode. In addition, a resin matrix of the first resin layer is constituted from polytetrafluoroethylene or a copolymer containing polytetrafluoroethylene as a primary component, and a resin matrix of the second resin layer is constituted from poly(vinylidene fluoride) or a copolymer containing poly(vinylidene fluoride) as a primary component.Type: GrantFiled: April 11, 2016Date of Patent: September 12, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya Umeyama, Yusuke Fukumoto, Naoyuki Wada, Yuji Yokoyama, Tatsuya Hashimoto, Naoto Onodera
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Publication number: 20170067181Abstract: A method for producing an epitaxial silicon wafer comprises applying a vapor deposition on a silicon wafer to produce the epitaxial silicon wafer. Vapor deposition equipment, in which the vapor deposition is conducted, at least includes a chamber, and a hydrogen-chloride-gas supply apparatus that is in communication and connected with an inside of the chamber to supply hydrogen chloride gas into the chamber. A valve that includes a diaphragm for regulating a flow of the hydrogen chloride gas from an inlet channel to an outlet channel is disposed in the hydrogen-chloride-gas supply apparatus. A W-containing Ni—Cr—Mo alloy material subjected to a passivation treatment is used for the diaphragm. When a maintenance work is to be done to the inside of the chamber, the hydrogen chloride gas is supplied from the hydrogen-chloride-gas supply apparatus into the chamber.Type: ApplicationFiled: September 2, 2016Publication date: March 9, 2017Applicant: SUMCO CORPORATIONInventor: Naoyuki WADA
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Publication number: 20170018777Abstract: A method for manufacturing an electrode sheet includes the steps of forming a granulated material by mixing an electrode active material, a cellulose derivative, a binder, and an aqueous solvent, and placing the granulated material in the form of a sheet on electrode current collector foil. The cellulose derivative is at least one selected from the group consisting of hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methylcellulose, and hydroxypropyl methylcellulose, and has 3.0 or more moles of substitution, which is an average number of hydroxy groups substituted per glucose unit.Type: ApplicationFiled: June 13, 2016Publication date: January 19, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Naoyuki WADA
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Publication number: 20160336568Abstract: Provided is a non-aqueous electrolyte secondary battery in which an increase in resistance is suppressed when high rate pulsed charging and discharging is repeatedly carried out. The non-aqueous electrolyte secondary battery provided by the present disclosure is provided with: a positive electrode; a negative electrode; a separator; and a non-aqueous electrolyte solution. The separator is provided with a separator base made of a non-woven fabric; a first resin layer provided on a surface of the separator base that faces the positive electrode; and a second resin layer provided on a surface of the separator base that faces the negative electrode. In addition, a resin matrix of the first resin layer is constituted from polytetrafluoroethylene or a copolymer containing polytetrafluoroethylene as a primary component, and a resin matrix of the second resin layer is constituted from poly(vinylidene fluoride) or a copolymer containing poly(vinylidene fluoride) as a primary component.Type: ApplicationFiled: April 11, 2016Publication date: November 17, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Yusuke FUKUMOTO, Naoyuki WADA, Yuji YOKOYAMA, Tatsuya HASHIMOTO, Naoto ONODERA
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Publication number: 20160260974Abstract: A lithium ion secondary battery includes: an electrode mixture layer that contains an electrode active material and an organic ferroelectric having a dielectric constant of 25 or higher; and an electrolytic solution that contains lithium bis(fluorosulfonyl)imide and a nonaqueous solvent. A content of the organic ferroelectric is 0.5 parts by mass to 10 parts by mass with respect to 100 parts by mass of the electrode active material. A proportion of a high-polarity solvent having a dielectric constant of 10 or higher in the nonaqueous solvent is 10 vol % or lower.Type: ApplicationFiled: March 4, 2016Publication date: September 8, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Naoto ONODERA, Naoyuki WADA, Yusuke FUKUMOTO, Tatsuya HASHIMOTO, Yuji YOKOYAMA, Hideki SANO
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Publication number: 20160240839Abstract: A manufacturing method for a non-aqueous electrolyte secondary battery includes: forming a powder; forming a sheet-like green compact; and forming a heat-resistant layer. The powder contains composite particles and a solvent. The composite particles contain inorganic filler particles and a binder. The green compact is formed by pressing the powder in a state in which the solvent remains. The heat-resistant layer is formed by disposing the green compact on a surface of at least any of a positive electrode mixture layer and a negative electrode mixture layer after the green compact is formed.Type: ApplicationFiled: February 9, 2016Publication date: August 18, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Yusuke FUKUMOTO, Naoyuki WADA, Yuji YOKOYAMA, Tatsuya HASHIMOTO, Naoto ONODERA
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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