Patents by Inventor Yuki Morikawa
Yuki Morikawa 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: 11942645Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator has a multilayer structure in which a first filler layer containing phosphate particles, a porous resin substrate, and a second filler layer containing inorganic particles having higher heat resistance than the phosphate particles are stacked in this order from the negative electrode side. The first filler layer is disposed on the porous resin substrate in such a manner that the surface of the first filler layer faces the surface of the negative electrode. The phosphate particles have a BET specific surface area in the range of 5 m2/g or more and 100 m2/g or less.Type: GrantFiled: November 2, 2018Date of Patent: March 26, 2024Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Akihiko Takada, Masanori Sugimori, Nobuhiro Hirano, Yuki Morikawa, Yasunori Baba, Katsunori Yanagida
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Patent number: 11909033Abstract: In a nonaqueous electrolyte secondary battery, a negative electrode mix layer includes a first layer and a second layer disposed successively from a negative electrode collector. The first layer contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less and a silicon-based active material containing Si. The second layer contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more and has a lower content (mass ratio) of the silicon-based active material than the first layer.Type: GrantFiled: January 22, 2019Date of Patent: February 20, 2024Assignees: PANASONIC HOLDINGS CORPORATION, PANASONIC ENERGY CO., LTD.Inventors: Kouhei Tsuzuki, Yuki Morikawa, Hirokazu Wada, Yuta Matsuo, Kaori Ishikawa, Katsunori Yanagida
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Publication number: 20240027585Abstract: A light receiving device according to an embodiment includes: a light receiving element (1000) using an SPAD; a current source (1001) that supplies a recharge current to the SPAD; a detection section (1002) that detects a voltage based on a current, inverts an output signal in a case where a voltage value of the detected voltage exceeds a threshold value, shapes the inverted output signal into a pulse signal, and outputs the pulse signal; a plurality of counters (201(1) to 201(N)) that each counts the pulse signal output from the detection section; and a distribution section (1101) that selects a target counter to which the pulse signal is to be supplied from the plurality of counters, in which distribution section selects the target counter by a plurality of control signals corresponding to the plurality of counters on a one-to-one basis, the plurality of control signals including a state of simultaneously selecting two or more counters among the plurality of counters.Type: ApplicationFiled: October 19, 2021Publication date: January 25, 2024Inventors: YUKI MORIKAWA, YUSUKE IKEDA
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Publication number: 20230396898Abstract: Provided are an avalanche photodiode (APD) sensor and a ranging system capable of counting, with high accuracy, a value relating to signals from a plurality of pixels with one counter.Type: ApplicationFiled: October 6, 2021Publication date: December 7, 2023Inventors: YASUNORI TSUKUDA, YUKI MORIKAWA
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Publication number: 20230387410Abstract: The herein disclosed negative electrode is a negative electrode for a nonaqueous electrolyte secondary battery that includes a current collector, and a negative electrode active material layer disposed on a single surface or both surfaces of the current collector. The negative electrode active material layer includes a negative electrode active material and a binder. A graphite particle and a Si-containing particle are included as the negative electrode active material. A carboxymethyl cellulose (CMC), a poly acrylic acid (PAA), and a styrene butadiene rubber (SBR) are included as the binder. A spring constant in a thickness direction of the negative electrode is equal to or more than 70 kN/mm and not more than 400 kN/mm, and a yield loop height on a stiffness test is equal to or less than 13 mm.Type: ApplicationFiled: May 16, 2023Publication date: November 30, 2023Inventors: Yurika KOJIMA, Yuki MORIKAWA, Naoto ONODERA, Kouhei TSUZUKI, Hideki SANO
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Publication number: 20230387387Abstract: A method of producing a negative electrode composite material slurry for a non-aqueous electrolyte secondary battery comprises a first step to obtain a first mixed-kneaded body, and a second step to use the first mixed-kneaded body to obtain the negative electrode composite material slurry. The first step includes a step to mix and knead a negative electrode active material including a carbon-based active material and a Si-based active material, carboxymethylcellulose, polyacrylic acid, and water. The second step includes a step (x1) to mix and knead the first mixed-kneaded body, carboxymethylcellulose, and water. A solid content of the first mixed-kneaded body is from (a-3)% to a%, and a solid content of the negative electrode composite material slurry is from (a-15)% to (a-10)%. “a” refers to the solid content [%] defined in the specification.Type: ApplicationFiled: May 19, 2023Publication date: November 30, 2023Inventors: Hideki SANO, Kouhei TSUZUKI, Naoto ONODERA, Yuki MORIKAWA, Yurika KOJIMA
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Publication number: 20230387386Abstract: The herein disclosed negative electrode is a negative electrode for a nonaqueous electrolyte secondary battery that includes a current collector, and a negative electrode active material layer disposed on the current collector. The negative electrode active material layer includes a negative electrode active material and a binder, and a graphite particle and a Si-containing particle are included as the negative electrode active material. An average 10% yield strength of the graphite particle is equal to or less than 12 MPa. A BET specific surface area of the graphite particle is equal to or more than 0.5 m2/g and not more than 3.5 m2/g. A spring constant in a thickness direction of the negative electrode is equal to or less than 200 kN/mm. A 90° peel strength between the current collector and the negative electrode active material layer is equal to or more than 1.5 N/m.Type: ApplicationFiled: May 16, 2023Publication date: November 30, 2023Inventors: Yuki MORIKAWA, Yurika KOJIMA, Naoto ONODERA, Kouhei TSUZUKI, Hideki SANO
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Publication number: 20230327110Abstract: A non-aqueous electrolyte secondary battery includes a negative electrode active material layer including a negative electrode active material. The negative electrode active material includes first graphite particles, second graphite particles each having a compressive elastic modulus more than a compressive elastic modulus of each of the first graphite particles, and Si-containing particles. A contact length Lt1 between a first graphite particle and a Si-containing particle is equal to or more than a contact length Lt2 between a second graphite particle and the Si-containing particle.Type: ApplicationFiled: April 7, 2023Publication date: October 12, 2023Inventors: Naoto ONODERA, Hideki SANO, Kouhei TSUZUKI, Yuki MORIKAWA, Yurika KOJIMA
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Publication number: 20230327081Abstract: The present disclosure relates to a negative electrode for a non-aqueous electrolyte secondary battery, wherein each of first silicon-containing particles and second silicon-containing particles contains a carbon domain and a silicon domain dispersed in the carbon domain and having a nano size, each of a first binder and a second binder contains carboxymethyl cellulose (CMC), and a content ratio of the carboxymethyl cellulose in a second active material layer is more than a content ratio of the carboxymethyl cellulose in a first active material layer.Type: ApplicationFiled: April 6, 2023Publication date: October 12, 2023Inventors: Kouhei TSUZUKI, Naoto ONODERA, Hideki SANO, Yuki MORIKAWA, Yurika KOJIMA
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Publication number: 20230327080Abstract: The present disclosure relates to a negative electrode for a non-aqueous electrolyte secondary battery, the negative electrode comprising an active material layer, wherein the active material layer contains graphite particles, fibrous carbon, silicon-containing particles, and a binder, a BET specific surface area of the graphite particles is 3.5 m2/g or less, the fibrous carbon includes a carbon nanotube, each of the silicon-containing particles includes a domain composed of carbon and a domain composed of silicon and having a size of 50 nm or less, and an oxygen content ratio in each of the silicon-containing particles is 7 wt % or less. According to the present disclosure, a negative electrode and a non-aqueous electrolyte secondary battery are provided to suppress decrease in initial capacity and cycling performance.Type: ApplicationFiled: March 24, 2023Publication date: October 12, 2023Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Kouhei TSUZUKI, Naoto ONODERA, Hideki SANO, Yuki MORIKAWA, Yurika KOJIMA
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Patent number: 11557787Abstract: The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The positive electrode includes a positive electrode collector with a thermal conductive rate of 65 W/(m·K) to 150 W/(m·K). The negative electrode includes a negative electrode active material layer including a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.Type: GrantFiled: March 12, 2021Date of Patent: January 17, 2023Assignees: PANASONIC HOLDINGS CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Morikawa, Takuya Asari, Harunari Shimamura, Kouhei Tsuzuki, Katsunori Yanagida, Yo Kato
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Publication number: 20220399535Abstract: The negative electrode disclosed herein includes: a negative electrode current collector; and a negative electrode active material layer formed on the surface of the negative electrode current collector. The negative electrode active material layer contains silicon oxide containing at least one alkali earth metal. The negative electrode active material layer includes at least a first layer and a second layer. The first layer is disposed between the second layer and the negative electrode current collector. The second layer contains 2 mass % or less of the silicon oxide containing the alkali earth metal, relative to 100 mass % of the negative electrode active material in the second layer. The amount of the alkali earth metal in the first layer calculated based on energy dispersive X-ray spectroscopy using a scanning electron microscope image is higher than the amount of the alkali earth metal in the second layer.Type: ApplicationFiled: June 13, 2022Publication date: December 15, 2022Inventors: Yuki Morikawa, Akira Tsujiko
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Publication number: 20220393148Abstract: The negative electrode disclosed herein includes: a negative electrode current collector; and a negative electrode active material layer formed on the surface of the negative electrode current collector. The negative electrode active material layer contains silicon oxide containing at least one alkali earth metal. The negative electrode active material layer includes at least a first layer and a second layer. The first layer is disposed between the second layer and the negative electrode current collector. The amount of the alkali earth metal in the second layer calculated based on energy dispersive X-ray spectroscopy using a scanning electron microscope image is higher than the amount of the alkali earth metal in the first layer.Type: ApplicationFiled: June 7, 2022Publication date: December 8, 2022Inventors: Yuki MORIKAWA, Akira TSUJIKO
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Publication number: 20220052312Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and a styrene-butadiene rubber, and the glass transition temperature (Tg) of the styrene-butadiene rubber in an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector is higher than that of the styrene-butadiene rubber in an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer.Type: ApplicationFiled: October 31, 2019Publication date: February 17, 2022Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kouhei Tsuzuki, Akihiko Takada, Yuki Morikawa, Hirokazu Wada, Katsunori Yanagida
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Publication number: 20220037640Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and carboxymethyl cellulose, wherein the molecular weight of the carboxymethyl cellulose in an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer is smaller than that of the carboxymethyl cellulose in an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector.Type: ApplicationFiled: November 11, 2019Publication date: February 3, 2022Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kouhei Tsuzuki, Yuki Morikawa, Hirokazu Wada, Katsunori Yanagida
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Publication number: 20220029165Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, said negative electrode comprising a negative-electrode current collector, and a negative-electrode active material layer provided upon the negative-electrode current collector, wherein the negative-electrode active material layer includes a negative-electrode active material and polyvinylpyrrolidone, and an area that extends 10% in the thickness direction from the surface of the reverse side of the negative-electrode active material layer from the negative-electrode current collector has a higher polyvinylpyrrolidone content than an area that extends 10% in the thickness direction from the surface of the negative-electrode current collector side of the negative-electrode active material layer.Type: ApplicationFiled: November 11, 2019Publication date: January 27, 2022Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kouhei Tsuzuki, Yuki Morikawa, Hirokazu Wada, Katsunori Yanagida
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Publication number: 20210296683Abstract: The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The positive electrode includes a positive electrode collector with a thermal conductive rate of 65 W/(m·K) to 150 W/(m·K). The negative electrode includes a negative electrode active material layer including a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.Type: ApplicationFiled: March 12, 2021Publication date: September 23, 2021Applicants: Panasonic Corporation, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Morikawa, Takuya Asari, Harunari Shimamura, Kouhei Tsuzuki, Katsunori Yanagida, Yo Kato
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Patent number: 10910633Abstract: A nonaqueous electrolyte secondary battery in which low-crystalline carbon-covered graphite is used as negative electrode active material, wherein a cobalt-containing lithium transitional metal oxide is used for: a first positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 8 mm3/g or greater; and a second positive electrode active material in which the volume per unit mass of pores having a pore size of 100 nm or less is 5 mm3/g or less.Type: GrantFiled: January 26, 2018Date of Patent: February 2, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takashi Ko, Fumiharu Niina, Katsunori Yanagida, Yasunori Baba, Yuki Morikawa
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Publication number: 20210013496Abstract: In a nonaqueous electrolyte secondary battery, a negative electrode mix layer includes a first layer and a second layer disposed successively from a negative electrode collector. The first layer contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less and a silicon-based active material containing Si. The second layer contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more and has a lower content (mass ratio) of the silicon-based active material than the first layer.Type: ApplicationFiled: January 22, 2019Publication date: January 14, 2021Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.Inventors: Kouhei Tsuzuki, Yuki Morikawa, Hirokazu Wada, Yuta Matsuo, Kaori Ishikawa, Katsunori Yanagida
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Patent number: 10892472Abstract: A non-aqueous electrolyte secondary battery which uses a lithium titanium composite oxide as a negative electrode active material is configured to use a first positive electrode active material that is a Co-containing lithium transition metal oxide and has a volume per mass of 8 mm3/g or more with respect to pores having a pore diameter of 100 nm or less and a second positive electrode active material that has a volume per mass of 5 mm3/g or less with respect to pores having a pore diameter of 100 nm or less.Type: GrantFiled: December 11, 2017Date of Patent: January 12, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yuki Morikawa, Yasunori Baba, Takashi Ko, Fumiharu Niina, Katsunori Yanagida