Patents by Inventor Yuji Tanjo
Yuji Tanjo 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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Patent number: 10811683Abstract: Provided is a positive electrode for a lithium ion secondary battery which includes a positive electrode active material layer including a positive electrode active material that is provided to at least one surface of a positive electrode current collector. The positive electrode active material includes a lithium nickel cobalt manganese composite oxide mixture containing two or more kinds of lithium nickel cobalt manganese composite oxides. An average primary particle diameter of the lithium nickel cobalt manganese composite oxide mixture is in a range of 0.4 micrometers or more and 2 micrometers or less. An average secondary particle diameter of the lithium nickel cobalt manganese composite oxide mixture is in a range of 4 micrometers or more and 12 micrometers or less. The positive electrode active material layer includes a conductive agent in a range of 1 to 5% based on a weight of the positive electrode active material layer.Type: GrantFiled: August 17, 2018Date of Patent: October 20, 2020Assignee: Envision AESC Japan Ltd.Inventors: Hidetoshi Tamura, Yuji Tanjo
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Patent number: 10573883Abstract: Provided is an electrode for a lithium ion secondary battery which includes an electrode current collector where an electrode active material mixture for a lithium ion secondary battery is disposed. The electrode active material mixture for a lithium ion secondary battery includes an electrode active material, a conductive agent containing carbon black, and a binder, and a maximum particle diameter (DMax_C) of the carbon black is smaller than a maximum particle diameter (DMax_E) of the electrode active material.Type: GrantFiled: December 14, 2017Date of Patent: February 25, 2020Assignee: Envision AESC Japan Ltd.Inventors: Hidetoshi Tamura, Yuji Tanjo
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Publication number: 20200044280Abstract: A lithium ion secondary battery includes: a power generating element including an electrolyte solution, and an electrode stack including a positive electrode including a positive electrode active material layer and a positive electrode current collector foil and a negative electrode including a negative electrode active material layer and a negative electrode current collector foil, the positive electrode and the negative electrode being stacked with a separator interposed therebetween; and a package that internally seals this power generating element. The negative electrode current collector foil is a copper foil, and the negative electrode has a tensile strength of 17.6 N/mm2 or more and 20.0 N/mm2 or less.Type: ApplicationFiled: August 1, 2019Publication date: February 6, 2020Applicant: Envision AESC Japan Ltd.Inventors: Akihiro Modeki, Yuji Tanjo
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Patent number: 10424789Abstract: Provided is a negative electrode for a lithium ion secondary battery including: a negative electrode current collector; and a negative electrode active material for a lithium ion secondary battery which is disposed on the negative electrode current collector and contains a carbon material and an aqueous binder. The carbon material is a graphite particle having a covering layer containing amorphous carbon by 5 wt % or less relative to a total weight of the carbon material.Type: GrantFiled: June 19, 2017Date of Patent: September 24, 2019Assignee: Envision AESC Japan Ltd.Inventors: Ippei Waki, Yuji Tanjo
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Patent number: 10388955Abstract: A negative electrode for a lithium ion secondary battery includes: a negative electrode current collector (11); and a negative electrode active material for a lithium ion secondary battery, which is disposed on the negative electrode current collector and contains a carbon material and an aqueous binder. The carbon material is a graphite particle having a covering layer containing amorphous carbon by 5 wt % or less relative to a total weight of the carbon material.Type: GrantFiled: June 19, 2017Date of Patent: August 20, 2019Assignee: Envision AESC Japan Ltd.Inventors: Ippei Waki, Yuji Tanjo
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Patent number: 10312494Abstract: Provided is a tab lead for a secondary battery including tab lead metal that has an adhesion interface with sealing resin. The adhesion interface is provided with a surface treatment film formed of a material including a polymer with carboxylic acid anhydride groups. Further provided is a nonaqueous electrolyte secondary battery including the tab lead for the secondary battery as a leading terminal of at least one of a positive electrode and a negative electrode.Type: GrantFiled: February 18, 2016Date of Patent: June 4, 2019Assignee: AUTOMOTIVE ENERGY SUPPLY CORPORATIONInventors: Masahiro Suguro, Hiromoto Taguchi, Yuji Tanjo
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Publication number: 20190067691Abstract: Provided is a positive electrode for a lithium ion secondary battery which includes a positive electrode active material layer including a positive electrode active material that is provided to at least one surface of a positive electrode current collector. The positive electrode active material includes a lithium nickel cobalt manganese composite oxide mixture containing two or more kinds of lithium nickel cobalt manganese composite oxides. An average primary particle diameter of the lithium nickel cobalt manganese composite oxide mixture is in a range of 0.4 micrometers or more and 2 micrometers or less. An average secondary particle diameter of the lithium nickel cobalt manganese composite oxide mixture is in a range of 4 micrometers or more and 12 micrometers or less. The positive electrode active material layer includes a conductive agent in a range of 1 to 5% based on a weight of the positive electrode active material layer.Type: ApplicationFiled: August 17, 2018Publication date: February 28, 2019Applicant: Automotive Energy Supply CorporationInventors: Hidetoshi Tamura, Yuji Tanjo
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Patent number: 10026953Abstract: A mixed electrode for a nonaqueous electrolyte battery includes: a first active material; a second active material that reacts with water more easily than the first active material; an organic moisture capture agent; and an organic binder that binds the first active material and the second active material. The organic moisture capture agent is present in the organic binder and the first active material has a smaller specific surface area than the second active material. Thus, the storability of the mixed electrode is improved and when the mixed electrode is applied to the battery, the cycle characteristics of the battery are improved.Type: GrantFiled: December 16, 2013Date of Patent: July 17, 2018Assignee: AUTOMOTIVE ENERGY SUPPLY CORPORATIONInventors: Yuji Tanjo, Hiroaki Tanizaki, Tatsuji Numata, Yoshihiro Niida, Yukinori Takahashi
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Patent number: 10020489Abstract: A lithium-ion secondary cell according to the present invention is provided with a positive electrode and a negative electrode. The positive electrode contains a lithium-manganese composite oxide partially substituted by magnesium as a positive electrode active material. The negative electrode contains a graphite coated with amorphous carbon as a negative electrode active material, a carbon black-based conductive aid and a fluororesin-based binding agent.Type: GrantFiled: March 14, 2013Date of Patent: July 10, 2018Assignee: AUTOMOTIVE ENERGY SUPPLY CORPORATIONInventors: Yuji Tanjo, Yukinori Takahashi, Yoshihiro Niida
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Publication number: 20180183043Abstract: Provided is an electrode for a lithium ion secondary battery which includes an electrode current collector where an electrode active material mixture for a lithium ion secondary battery is disposed. The electrode active material mixture for a lithium ion secondary battery includes an electrode active material, a conductive agent containing carbon black, and a binder, and a maximum particle diameter (DMax_C) of the carbon black is smaller than a maximum particle diameter (DMax_E) of the electrode active material.Type: ApplicationFiled: December 14, 2017Publication date: June 28, 2018Applicant: Automotive Energy Supply CorporationInventors: Hidetoshi Tamura, Yuji Tanjo
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Publication number: 20180006305Abstract: A negative electrode for a lithium ion secondary battery includes: a negative electrode current collector (11); and a negative electrode active material for a lithium ion secondary battery, which is disposed on the negative electrode current collector and contains a carbon material and an aqueous binder. The carbon material is a graphite particle having a covering layer containing amorphous carbon by 5 wt % or less relative to a total weight of the carbon material.Type: ApplicationFiled: June 19, 2017Publication date: January 4, 2018Applicant: Automotive Energy Supply CorporationInventors: Ippei Waki, Yuji Tanjo
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Publication number: 20180006304Abstract: Provided is a negative electrode for a lithium ion secondary battery including: a negative electrode current collector; and a negative electrode active material for a lithium ion secondary battery which is disposed on the negative electrode current collector and contains a carbon material and an aqueous binder.Type: ApplicationFiled: June 19, 2017Publication date: January 4, 2018Applicant: Automotive Energy Supply CorporationInventors: Ippei Waki, Yuji Tanjo
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Patent number: 9847514Abstract: A battery comprising an electrode stacked body that includes a plurality of electrodes and a plurality of separators that are alternately stacked; and a film-made cover member that, by joining mutually overlapped peripheral portions of films, constitute a package for hermetically receiving therein the electrode stacked body, in which the plurality of separators include separators that are flat in shape and larger in size and separators that are flat in shape and smaller in size, and the separators that are flat in shape and larger in size project outward from a side of the electrode stacked body and joined to the films of the film-made cover member at a position inside the mutually joined peripheral portions of the film-made cover member.Type: GrantFiled: March 21, 2014Date of Patent: December 19, 2017Assignee: AUTOMOTIVE ENERGY SUPPLY CORPORATIONInventors: Yuji Tanjo, Shinichiro Sakaguchi
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Patent number: 9680153Abstract: A nonaqueous electrolyte secondary battery includes a power generating element including a positive electrode having a positive electrode active material layer and a negative electrode having a negative electrode active material layer. A main plane having the smaller area, between a main plane of the positive electrode active material layer and a main plane of the negative electrode active material layer, has an approximately rectangular shape with a short side having a length of 132 mm or more. The positive electrode active material layer and the negative electrode active material layer are provided such that the main plane of the positive electrode active material layer and the main plane of the negative electrode active material layer face each other with a separator interposed therebetween, and the positive electrode active material layer contains a binder in an amount of 2 mass % or more and 3.5 mass % or less.Type: GrantFiled: March 16, 2015Date of Patent: June 13, 2017Assignee: AUTOMOTIVE ENERGY SUPPLY CORPORATIONInventors: Yuji Tanjo, Yoshihiro Niida
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Publication number: 20160351949Abstract: Provided is a lithium ion secondary battery that includes a package housing a positive electrode, a negative electrode, a separator, and an electrolyte solution. In the lithium ion secondary battery: the package including a stack including a metal base material, an acid modified polypropylene layer, and a polypropylene layer stacked sequentially; the polypropylene layer forms an inner surface of the package; the package includes a heat-sealed portion and a non-sealed portion; and the thickness of one acid modified polypropylene layer included in the heat-sealed portion is smaller than a half of the thickness of the polypropylene layer included in the heat-sealed portion.Type: ApplicationFiled: May 17, 2016Publication date: December 1, 2016Applicant: Automotive Energy Supply CorporationInventors: Hiromoto TAGUCHI, Aika KIMURA, Masatomo MIZUTA, Yuji TANJO
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Publication number: 20160248074Abstract: Provided is a tab lead for a secondary battery including tab lead metal that has an adhesion interface with sealing resin. The adhesion interface is provided with a surface treatment film formed of a material including a polymer with carboxylic acid anhydride groups. Further provided is a nonaqueous electrolyte secondary battery including the tab lead for the secondary battery as a leading terminal of at least one of a positive electrode and a negative electrode.Type: ApplicationFiled: February 18, 2016Publication date: August 25, 2016Applicant: Automotive Energy Supply CorporationInventors: Masahiro SUGURO, Hiromoto TAGUCHI, Yuji TANJO
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Publication number: 20160197339Abstract: A mixed electrode for a nonaqueous electrolyte battery includes: a first active material; a second active material that reacts with water more easily than the first active material; an organic moisture capture agent; and an organic binder that binds the first active material and the second active material. The organic moisture capture agent is present in the organic binder and the first active material has a smaller specific surface area than the second active material. Thus, the storability of the mixed electrode is improved and when the mixed electrode is applied to the battery, the cycle characteristics of the battery are improved.Type: ApplicationFiled: December 16, 2013Publication date: July 7, 2016Applicant: Automotive Energy Supply CorporationInventors: Yuji TANJO, Hiroaki TANIZAKI, Tatsuji NUMATA, Yoshihiro NIIDA, Yukinori TAKAHASHI
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Publication number: 20150311531Abstract: A nonaqueous electrolyte secondary battery includes a power generating element including a positive electrode having a positive electrode active material layer and a negative electrode having a negative electrode active material layer. A main plane having the smaller area, between a main plane of the positive electrode active material layer and a main plane of the negative electrode active material layer, has an approximately rectangular shape with a short side having a length of 132 mm or more. The positive electrode active material layer and the negative electrode active material layer are provided such that the main plane of the positive electrode active material layer and the main plane of the negative electrode active material layer face each other with a separator interposed therebetween, and the positive electrode active material layer contains a binder in an amount of 2 mass % or more and 3.5 mass % or less.Type: ApplicationFiled: March 16, 2015Publication date: October 29, 2015Applicant: AUTOMOTIVE ENERGY SUPPLY CORPORATIONInventors: Yuji TANJO, Yoshihiro NIIDA
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Publication number: 20150280213Abstract: A nonaqueous electrolyte battery includes a positive electrode active material layer containing a positive electrode active material. The positive electrode active material contains a lithium manganese composite oxide containing sulfate and/or sulfate ions, and a lithium nickel composite oxide containing lithium hydroxide and a second alkaline compound that is not lithium hydroxide, and, per unit mass of the positive electrode active material, the molar equivalent of the sulfate and/or the sulfate ions in the lithium manganese composite oxide is more than the molar equivalent of the lithium hydroxide in the lithium nickel composite oxide and less than the molar equivalent of the second alkaline compound in the lithium nickel composite oxide.Type: ApplicationFiled: March 4, 2015Publication date: October 1, 2015Applicant: Automotive Energy Supply CorporationInventors: Yuji TANJO, Yoshihiro NIIDA
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Publication number: 20150044567Abstract: A lithium-ion secondary cell according to the present invention is provided with a positive electrode and a negative electrode. The positive electrode contains a lithium-manganese composite oxide partially substituted by magnesium as a positive electrode active material. The negative electrode contains a graphite coated with amorphous carbon as a negative electrode active material, a carbon black-based conductive aid and a fluororesin-based binding agent.Type: ApplicationFiled: March 14, 2013Publication date: February 12, 2015Applicant: Automotive Energy Supply CorporationInventors: Yuji Tanjo, Yukinori Takahashi, Yoshihiro Niida