Patents by Inventor Takanobu Yamada
Takanobu Yamada 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: 11929463Abstract: An all-solid-state secondary battery including: a cathode including a cathode active material layer; an anode including an anode current collector, and an anode active material layer on the anode current collector, wherein the anode active material layer includes an anode active material which is alloyable with lithium or forms a compound with lithium; and a solid electrolyte layer between the cathode and the anode, wherein a ratio of an initial charge capacity (b) of the anode active material layer to an initial charge capacity (a) of the cathode active material layer satisfies a condition of Equation 1: 0.01<(b/a)<0.5, wherein a is the initial charge capacity of the cathode active material layer determined from a first open circuit voltage to a maximum charging voltage, and b is the initial charge capacity of the anode active material layer determined from a second open circuit voltage to 0.01 volts vs. Li/Li+.Type: GrantFiled: February 3, 2023Date of Patent: March 12, 2024Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Naoki Suzuki, Nobuyoshi Yashiro, Takanobu Yamada, Yuichi Aihara
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Publication number: 20240047761Abstract: An all-solid-state secondary battery including: a cathode including a cathode active material layer; an anode including an anode current collector, and an anode active material layer on the anode current collector, wherein the anode active material layer includes an anode active material which is alloyable with lithium or forms a compound with lithium; and a solid electrolyte layer between the cathode and the anode, wherein a ratio of an initial charge capacity (b) of the anode active material layer to an initial charge capacity (a) of the cathode active material layer satisfies a condition of Equation 1: 0.01<(b/a)<0.5, wherein a is the initial charge capacity of the cathode active material layer determined from a first open circuit voltage to a maximum charging voltage, and b is the initial charge capacity of the anode active material layer determined from a second open circuit voltage to 0.01 volts vs. Li/Li+.Type: ApplicationFiled: October 10, 2023Publication date: February 8, 2024Inventors: Naoki SUZUKI, Nobuyoshi YASHIRO, Takanobu YAMADA, Yuichi AIHARA
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Publication number: 20230378430Abstract: A lithium-ion secondary battery includes an inorganic filler having a mean particle size of 1 ?m to 10 ?m. A ratio A/B is 14 to 28, where A is a weight ratio of a second binder and the inorganic filler (i.e., second binder/inorganic filler) in an insulating layer, and B is a weight ratio of a first binder and positive electrode active material particles (i.e., first binder/positive electrode active material particles) in a positive electrode active material layer.Type: ApplicationFiled: July 27, 2023Publication date: November 23, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinichiro ITO, Takanobu YAMADA
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Patent number: 11799171Abstract: An all-solid secondary battery including: a cathode including a cathode active material layer; an anode including an anode active material layer; and a solid electrolyte layer including a sulfide solid electrolyte between the cathode active material layer and the anode active material layer, wherein an arithmetic mean roughness (Ra) of an interface between the cathode active material layer and the solid electrolyte layer is about 1 micrometer or less, and a relative density of the solid electrolyte layer is about 80% or more.Type: GrantFiled: December 1, 2020Date of Patent: October 24, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Satoshi Fujiki, Takanobu Yamada, Tomoyuki Shiratsuchi, Yuichi Aihara
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Patent number: 11764407Abstract: An all-solid-state secondary battery including: a cathode including a cathode active material layer; an anode including an anode current collector, and an anode active material layer on the anode current collector, wherein the anode active material layer includes an anode active material which is alloyable with lithium or forms a compound with lithium; and a solid electrolyte layer between the cathode and the anode, wherein a ratio of an initial charge capacity (b) of the anode active material layer to an initial charge capacity (a) of the cathode active material layer satisfies a condition of Equation 1: 0.01<(b/a)<0.5, wherein a is the initial charge capacity of the cathode active material layer determined from a first open circuit voltage to a maximum charging voltage, and b is the initial charge capacity of the anode active material layer determined from a second open circuit voltage to 0.01 volts vs. Li/Li+.Type: GrantFiled: March 22, 2021Date of Patent: September 19, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Naoki Suzuki, Nobuyoshi Yashiro, Takanobu Yamada, Yuichi Aihara
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Patent number: 11757084Abstract: A lithium-ion secondary battery includes an inorganic filler having a mean particle size of 1 ?m to 10 ?m. A ratio A/B is 14 to 28, where A is a weight ratio of a second binder and the inorganic filler (i.e., second binder/inorganic filler) in an insulating layer, and B is a weight ratio of a first binder and positive electrode active material particles (i.e., first binder/positive electrode active material particles) in a positive electrode active material layer.Type: GrantFiled: August 21, 2020Date of Patent: September 12, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinichiro Ito, Takanobu Yamada
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Publication number: 20230187705Abstract: An all-solid-state secondary battery including: a cathode including a cathode active material layer; an anode including an anode current collector, and an anode active material layer on the anode current collector, wherein the anode active material layer includes an anode active material which is alloyable with lithium or forms a compound with lithium; and a solid electrolyte layer between the cathode and the anode, wherein a ratio of an initial charge capacity (b) of the anode active material layer to an initial charge capacity (a) of the cathode active material layer satisfies a condition of Equation 1: 0.01 <(b/a)<0.5, wherein a is the initial charge capacity of the cathode active material layer determined from a first open circuit voltage to a maximum charging voltage, and b is the initial charge capacity of the anode active material layer determined from a second open circuit voltage to 0.01 volts vs. Li/Li+.Type: ApplicationFiled: February 3, 2023Publication date: June 15, 2023Inventors: Naoki SUZUKI, Nobuyoshi YASHIRO, Takanobu YAMADA, Yuichi AIHARA
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Patent number: 11611109Abstract: An all-solid-state secondary battery including: a cathode including a cathode active material layer; an anode including an anode current collector, and an anode active material layer on the anode current collector, wherein the anode active material layer includes an anode active material which is alloyable with lithium or forms a compound with lithium; and a solid electrolyte layer between the cathode and the anode, wherein a ratio of an initial charge capacity (b) of the anode active material layer to an initial charge capacity (a) of the cathode active material layer satisfies a condition of Equation 1: 0.01<(b/a)<0.5, wherein a is the initial charge capacity of the cathode active material layer determined from a first open circuit voltage to a maximum charging voltage, and b is the initial charge capacity of the anode active material layer determined from a second open circuit voltage to 0.01 volts vs. Li/Li+.Type: GrantFiled: March 22, 2021Date of Patent: March 21, 2023Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Naoki Suzuki, Nobuyoshi Yashiro, Takanobu Yamada, Yuichi Aihara
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Publication number: 20230055772Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode including a positive electrode collector, a positive electrode active material layer on part of the surface of the positive electrode collector, and an insulating layer on another part of the surface of the positive electrode collector; a negative electrode including a negative electrode collector; and a negative electrode active material layer on part of the surface of the negative electrode collector; a separator that insulates the positive and negative electrodes; and a nonaqueous electrolyte. A width of the negative electrode active material layer is wider than the positive electrode active material layer. The insulating layer protrudes from the negative electrode active material layer; and exhibits a thermal shrinkage factor of 13% or less in a direction parallel to the surface of a square insulating layer sample having a side length of 5 cm and heated at 150° C. for 1 hour.Type: ApplicationFiled: November 2, 2022Publication date: February 23, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takanobu YAMADA, Tetsuya KANEKO
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Patent number: 11552285Abstract: A non-aqueous electrolyte secondary battery including electrode body having structure in which positive electrode and negative electrode are laminated with separator and non-aqueous electrolyte. The positive electrode includes positive electrode current collector, positive electrode active material layer which is disposed on positive electrode current collector and contains first positive electrode active material, and insulating layer which is disposed along one end of positive electrode active material layer in predetermined width direction, and contains inorganic filler and second positive electrode active material.Type: GrantFiled: August 6, 2020Date of Patent: January 10, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takanobu Yamada, Yasushi Tsuchida
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Patent number: 11522253Abstract: An object to provide a nonaqueous electrolyte secondary battery that allows more suitably suppressing short circuits between a positive electrode collector and a negative electrode active material layer, even when the battery generates heat. A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator. The positive electrode includes a positive electrode collector, a positive electrode active material layer, and an insulating layer provided on another part of the surface of the positive electrode collector, adjacent to the positive electrode active material layer. The insulating layer contains an inorganic filler and a binder; and is configure to exhibit a value of 13% or less of a thermal shrinkage factor in a direction parallel to the surface of an evaluation sample of an insulating layer formed to a square shape having a length of each side of 5 cm and heated at 150° C. for 1 hour.Type: GrantFiled: March 27, 2020Date of Patent: December 6, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takanobu Yamada, Tetsuya Kaneko
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Patent number: 11522197Abstract: An object of the present invention is to provide a nonaqueous electrolyte secondary battery that allows more suitably suppressing short circuits between a positive electrode collector and a negative electrode active material layer, even when the battery generates heat. Provided is a nonaqueous electrolyte secondary battery 1 that includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector, a positive electrode active material layer, and an insulating layer provided on another part of the surface of the positive electrode collector, so as to be adjacent to the positive electrode active material layer. The insulating layer contains an inorganic filler and a binder. A penetration strength of the insulating layer in a thickness direction perpendicular to the surface of the positive electrode collector is 0.05 N/mm2 or higher.Type: GrantFiled: March 27, 2020Date of Patent: December 6, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takanobu Yamada, Tetsuya Kaneko
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Patent number: 11424444Abstract: A lithium ion secondary battery suppressed in heat generation entailed by charging and discharging is provided. A lithium ion secondary battery includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector, a positive electrode active material layer provided at some part of the surface of the positive electrode collector, and including a positive electrode active material, and an insulation layer provided so as to be at the other part of the surface of the positive electrode collector and to be adjacent to the positive electrode active material layer. The insulation layer includes an inorganic filler, LPO, and a binder.Type: GrantFiled: January 14, 2020Date of Patent: August 23, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takanobu Yamada, Masaki Kato
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Patent number: 11387462Abstract: An object of this disclosure is to provide a lithium ion battery in which generation of heat can be suitably suppressed. Provided is a lithium ion battery including a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector, a positive electrode active material layer, and an insulating layer provided on another part of the surface of the positive electrode collector, so as to be adjacent to the positive electrode active material layer. The insulating layer contains an inorganic filler and a binder. At least part of the surface of the inorganic filler is covered with LPO.Type: GrantFiled: March 27, 2020Date of Patent: July 12, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Takanobu Yamada
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Patent number: 11271243Abstract: An all-solid secondary battery, comprising: a cell comprising a positive electrode active material layer, a negative electrode active material comprising at least one of lithium metal and a lithium-containing alloy, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, wherein a ratio of volume density to true density of the positive electrode active material layer is about 0.6 or greater, wherein a ratio of volume density to true density of the solid electrolyte layer is about 0.6 or greater, and wherein an average pressure applied to opposite sides of the solid electrolyte layer in a fully discharged state is greater than 0 megapascals and 7.5 megapascals or less.Type: GrantFiled: September 27, 2018Date of Patent: March 8, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Satoshi Fujiki, Takanobu Yamada, Taku Watanabe, Yuichi Aihara, Shiratsuchi Tomoyuki
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Patent number: 11264641Abstract: An all-solid secondary battery, including: a first current collector; a pair of first active material layers disposed on opposite sides of the first current collector; a pair of solid electrolyte layers disposed on surfaces of the pair of first active material layers; a pair of second active material layers disposed on surfaces of the pair of solid electrolyte layers; and a pair of second current collectors disposed on surfaces of the pair of second active material layers, wherein a surface of one of the pair of second current collectors opposite to a surface of one of the pair of second active material layers does not comprise protrusions having a height of greater than about 8 micrometers.Type: GrantFiled: January 10, 2019Date of Patent: March 1, 2022Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Takanobu Yamada, Shiratsuchi Tomoyuki, Koji Yoshida, Ryo Omoda
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Publication number: 20210408523Abstract: An anode for an all solid-state secondary battery, the anode including an anode collector, and coating lithium distribution layer disposed on the anode collector, wherein the lithium distribution layer includes a metal capable of forming an alloy with lithium.Type: ApplicationFiled: September 10, 2021Publication date: December 30, 2021Inventors: Satoshi FUJIKI, Seitaro ITO, Taku WATANABE, Yuichi AIHARA, Takanobu YAMADA
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Publication number: 20210408522Abstract: An anode for an all solid-state secondary battery, the anode including an anode collector, and coating lithium distribution layer disposed on the anode collector, wherein the lithium distribution layer includes a metal capable of forming an alloy with lithium.Type: ApplicationFiled: September 10, 2021Publication date: December 30, 2021Inventors: Satoshi FUJIKI, Seitaro ITO, Taku WATANABE, Yuichi AIHARA, Takanobu YAMADA
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Publication number: 20210210791Abstract: An all-solid-state secondary battery including: a cathode including a cathode active material layer; an anode including an anode current collector, and an anode active material layer on the anode current collector, wherein the anode active material layer includes an anode active material which is alloyable with lithium or forms a compound with lithium; and a solid electrolyte layer between the cathode and the anode, wherein a ratio of an initial charge capacity (b) of the anode active material layer to an initial charge capacity (a) of the cathode active material layer satisfies a condition of Equation 1: 0.01<(b/a)<0.5, wherein a is the initial charge capacity of the cathode active material layer determined from a first open circuit voltage to a maximum charging voltage, and b is the initial charge capacity of the anode active material layer determined from a second open circuit voltage to 0.01 volts vs. Li/Li+.Type: ApplicationFiled: March 22, 2021Publication date: July 8, 2021Inventors: Naoki SUZUKI, Nobuyoshi YASHIRO, Takanobu YAMADA, Yuichi AIHARA
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Patent number: 10985407Abstract: An all-solid-state secondary battery including: a cathode including a cathode active material layer; an anode including an anode current collector, and an anode active material layer on the anode current collector, wherein the anode active material layer includes an anode active material which is alloyable with lithium or forms a compound with lithium; and a solid electrolyte layer between the cathode and the anode, wherein a ratio of an initial charge capacity (b) of the anode active material layer to an initial charge capacity (a) of the cathode active material layer satisfies a condition of Equation 1: 0.01<(b/a)<0.5, wherein a is the initial charge capacity of the cathode active material layer determined from a first open circuit voltage to a maximum charging voltage, and b is the initial charge capacity of the anode active material layer determined from a second open circuit voltage to 0.01 volts vs. Li/Li+.Type: GrantFiled: November 20, 2018Date of Patent: April 20, 2021Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Naoki Suzuki, Nobuyoshi Yashiro, Takanobu Yamada, Yuichi Aihara