Patents by Inventor Shigeki Matsuta
Shigeki Matsuta 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: 20230282951Abstract: Provided is a technology capable of improving the impregnation efficiency of an electrolyte into an electrode body. In accordance with a preferable one embodiment of a method for manufacturing a secondary battery herein disclosed, a method for manufacturing a secondary battery including an electrode body, an electrolyte, and a battery case is provided. The manufacturing method includes a solution introducing step of introducing the electrolyte into the battery case, and a pressure reducing step of reducing the pressure in the battery case after the solution introducing step. After an elapse of 10 hours or more after the solution introducing step, the pressure reducing step is carried out.Type: ApplicationFiled: November 28, 2022Publication date: September 7, 2023Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Hideki SANO, Daisuke NISHIDE, Shigeki MATSUTA
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Patent number: 11450917Abstract: The power storage device is provided with a cell stack body formed by alternately arranging a plurality of secondary cells and a plurality of buffer plates. Each of the buffer plates has a non-deformable section and a deformable section that is elastically deformed according to a volume change in the secondary cell. The non-deformable section has a through hole in which the deformable section is fitted. The deformable section is formed thicker than the non-deformable section.Type: GrantFiled: December 27, 2018Date of Patent: September 20, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Takuya Oka, Hiroshi Yoshizawa, Shigeki Matsuta, Yoshiaki Araki
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Publication number: 20220131123Abstract: A slurry is prepared by mixing active material particles, capsule-shaped particles, a binder, and an organic solvent. The slurry is applied to a surface of a substrate to form a coating film. The coating film is heated to dry to form an active material layer. The active material layer is compressed to produce an electrode. Each of the capsule-shaped particles includes a thermoplastic resin. The thermoplastic resin softens when heated in the presence of the organic solvent. When the thermoplastic resin softens, the capsule-shaped particles shrink to form voids in the active material layer.Type: ApplicationFiled: September 23, 2021Publication date: April 28, 2022Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Hikaru YOSHIDA, Shigeki MATSUTA
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Publication number: 20220094023Abstract: A secondary battery according to an aspect of the present disclosure includes a multilayer electrode body obtained by laminating multiple electrode plates with a separator interposed in between, multiple electrode tabs protruding from first ends of the multiple electrode plates, an exterior body having an opening receiving the multilayer electrode body, a sealing plate that closes the opening, a collector disposed on the sealing plate and connected to the multiple electrode tabs with a connector, and a binding member that binds the multiple electrode tabs between the connector and the multilayer electrode body. A secondary battery with this structure prevents damages of electrode tabs due to abrasion between the electrode tabs.Type: ApplicationFiled: November 27, 2019Publication date: March 24, 2022Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yuma Kamiyama, Shigeki Matsuta, Yoshiaki Araki
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Publication number: 20220013789Abstract: Provided is a secondary battery that can sufficiently suppress a leakage current even when conductive foreign matter passes through a separator to cause a minute short-circuit. The secondary battery according to an aspect of the present disclosure comprises: a positive electrode; a negative electrode; and a separator interposed between the positive electrode and the negative electrode, wherein each of the positive electrode and the negative electrode has a current collector and a mixed material layer formed on the surface of the current collector. At least one of the positive electrode and the negative electrode has a semiconductor layer formed substantially over the entire surface of the mixed material layer and having a higher resistance than the mixed material layer.Type: ApplicationFiled: October 10, 2019Publication date: January 13, 2022Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventor: Shigeki Matsuta
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Publication number: 20210135317Abstract: The power storage device is provided with a cell stack body formed by alternately arranging a plurality of secondary cells and a plurality of buffer plates. Each of the buffer plates has a non-deformable section and a deformable section that is elastically deformed according to a volume change in the secondary cell. The non-deformable section has a through hole in which the deformable section is fitted. The deformable section is formed thicker than the non-deformable section.Type: ApplicationFiled: December 27, 2018Publication date: May 6, 2021Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takuya Oka, Hiroshi Yoshizawa, Shigeki Matsuta, Yoshiaki Araki
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Publication number: 20140356685Abstract: To provide an assembled cell in which problems such as the fast deterioration of only some unit cells positioned in a middle part are solved by realizing smooth heat dissipation from the middle part of the cell even if an outer member is made of a flexible material. A first heat transfer member 6 including bag members 6a made of polycarbonate and filled with silicone gel is provided between a housing 2 and a unit cell assembly 5 in which a plurality of unit cells 10 are stacked, and in a middle part in a direction of stacking of the unit cells 10. The unit cells 10 are each provided with an outer member 18 made of aluminum laminate film.Type: ApplicationFiled: September 24, 2012Publication date: December 4, 2014Applicant: SANYO ELECTRIC CO., LTD.Inventors: Hiroyuki Okuda, Yoshito Kaga, Shigeki Matsuta, Hiroshi Kondo
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Patent number: 8852769Abstract: A nonaqueous secondary battery includes a current cutoff mechanism that cuts off a current in a short period of time in response to a rise in pressure inside a battery outer body in at least one of a conductive path through which a current is taken out from a positive electrode plate to outside of the battery and a conductive path through which a current is taken out from a negative electrode plate to outside of the battery. At least one type selected from an oligomer containing a cyclohexyl group and a phenyl group, a modified product of the oligomer containing a cyclohexyl group and a phenyl group, a polymer containing a cyclohexyl group and a phenyl group, and a modified product of the polymer containing a cyclohexyl group and a phenyl group is present on the surface of the positive electrode plate.Type: GrantFiled: October 24, 2011Date of Patent: October 7, 2014Assignee: SANYO Electric Co., Ltd.Inventors: Masahiro Iyori, Hirofusa Tanaka, Naoki Terada, Seiji Omura, Yasuhiro Yamauchi, Toshiyuki Nohma, Masahide Miyake, Yasuyuki Kusumoto, Shigeki Matsuta, Toyoki Fujihara, Takeshi Yoshida
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Patent number: 8609279Abstract: A rechargeable lithium battery including a negative electrode made by depositing a noncrystalline thin film composed entirely or mainly of silicon on a current collector, a positive electrode and a nonaqueous electrolyte, characterized in that said nonaqueous electrolyte contains carbon dioxide dissolved therein.Type: GrantFiled: June 3, 2004Date of Patent: December 17, 2013Assignee: Sanyo Electric Co., Ltd.Inventors: Daizo Jito, Noriyuki Tamura, Nobuhiro Sakitani, Hiroshi Minami, Hiromasa Yagi, Maruo Kamino, Katsunobu Sayama, Yoshio Kato, Shigeki Matsuta
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Patent number: 8388703Abstract: A method for producing a non-aqueous electrolyte secondary cell by preparing a positive electrode by applying a positive electrode mixture onto a positive electrode core material, the mixture containing a positive electrode active material mainly made of a lithium nickel composite oxide and a binding agent containing polyvinylidene fluoride; measuring the amount of carbon dioxide gas generated when a layer of the positive electrode mixture is removed out of the positive electrode and the layer is heated to 200° C. or higher and 400° C. or lower in an inactive gas atmosphere; selecting a positive electrode satisfying the following formulas: y<(0.27x?51)/1000000(200?x<400)??formula 1 y<57/1000000(400?x?1500)??formula 2 where x is a heating temperature (° C.) and y is the amount of carbon dioxide gas (mole/g) per 1 g of the lithium nickel composite oxide measured; and preparing the non-aqueous electrolyte secondary cell by using the positive electrode selected.Type: GrantFiled: May 11, 2012Date of Patent: March 5, 2013Assignee: SANYO Electric Co., Ltd.Inventors: Katsutoshi Takeda, Yoshio Kato, Shingo Tode, Masanori Maekawa, Shigeki Matsuta
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Publication number: 20130004837Abstract: Disclosed is a nonaqueous electrolyte secondary battery which has a negative electrode containing silicon as a negative active material, a positive electrode containing a positive active material, a nonaqueous electrolyte and a separator. Characteristically, an additive which retards oxidation of silicon during operation of the battery is contained either in an interior or surface portion of the positive electrode, in an interior or surface portion of the negative electrode, or in an interior or surface portion of the separator.Type: ApplicationFiled: September 7, 2012Publication date: January 3, 2013Inventors: Hidekazu YAMAMOTO, Keiji SAISHO, Yoshio KATO, Shigeki MATSUTA
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Publication number: 20120280172Abstract: A method for producing a non-aqueous electrolyte secondary cell by preparing a positive electrode by applying a positive electrode mixture onto a positive electrode core material, the mixture containing a positive electrode active material mainly made of a lithium nickel composite oxide and a binding agent containing polyvinylidene fluoride; measuring the amount of carbon dioxide gas generated when a layer of the positive electrode mixture is removed out of the positive electrode and the layer is heated to 200° C. or higher and 400° C. or lower in an inactive gas atmosphere; selecting a positive electrode satisfying the following formulas: y<(0.27x?51)/1000000(200?x<400)??formula 1 y<57/1000000(400?x?1500)??formula 2 where x is a heating temperature (° C.) and y is the amount of carbon dioxide gas (mole/g) per 1 g of the lithium nickel composite oxide measured; and preparing the non-aqueous electrolyte secondary cell by using the positive electrode selected.Type: ApplicationFiled: May 11, 2012Publication date: November 8, 2012Applicant: SANYO ELECTRIC CO., LTD.Inventors: Katsutoshi Takeda, Yoshio Kato, Shingo Tode, Masanori Maekawa, Shigeki Matsuta
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Publication number: 20120180549Abstract: A positive electrode active material quality judgment method that can easily and accurately judge the quality of a positive electrode active material used in a non-aqueous electrolyte secondary cell without having to complete the positive electrode. The positive electrode active material quality judgment method includes: heating a positive electrode active material mainly made of a lithium nickel composite oxide to a temperature x (° C.) of 200° C. or higher and 1500° C. or lower; measuring the amount of carbon dioxide gas occurring from the heating; and the positive electrode active material as a suitable positive electrode active material when the positive electrode active material satisfies formulas 1 and 2: y<(0.27x?51)/1000000(200?x<400)??formula 1 y<57/1000000(400?x?1500)??formula 2 where x is the heating temperature x (° C.) and y is the amount of carbon dioxide gas (mole/g) occurring per 1 g of the positive electrode active material in the heating to the heating temperature x (° C.).Type: ApplicationFiled: March 28, 2012Publication date: July 19, 2012Applicant: SANYO Electric Co., Ltd.Inventors: Katsutoshi Takeda, Yoshio Kato, Shingo Tode, Masanori Maekawa, Shigeki Matsuta
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Patent number: 8197556Abstract: A method for producing a non-aqueous electrolyte secondary cell by preparing a positive electrode by applying a positive electrode mixture onto a positive electrode core material, the mixture containing a positive electrode active material mainly made of a lithium nickel composite oxide and a binding agent containing polyvinylidene fluoride; measuring the amount of carbon dioxide gas generated when a layer of the positive electrode mixture is removed out of the positive electrode and the layer is heated to 200° C. or higher and 400° C. or lower in an inactive gas atmosphere; selecting a positive electrode satisfying the following formulas: y<(1.31x?258)/1000000(200?x<300)??formula 3 y<1.20x?225/1000000(300?x?400)??formula 4 where x is a heating temperature (° C.) and y is the amount of carbon dioxide gas (mole/g) per 1 g of the lithium nickel composite oxide measured; and preparing the non-aqueous electrolyte secondary cell by using the positive electrode selected.Type: GrantFiled: November 11, 2008Date of Patent: June 12, 2012Assignee: SANYO Electric Co., Ltd.Inventors: Katsutoshi Takeda, Yoshio Kato, Shingo Tode, Masanori Maekawa, Shigeki Matsuta
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Publication number: 20120107652Abstract: A nonaqueous secondary battery includes a current cutoff mechanism that cuts off a current in a short period of time in response to a rise in pressure inside a battery outer body in at least one of a conductive path through which a current is taken out from a positive electrode plate to outside of the battery and a conductive path through which a current is taken out from a negative electrode plate to outside of the battery. At least one type selected from an oligomer containing a cyclohexyl group and a phenyl group, a modified product of the oligomer containing a cyclohexyl group and a phenyl group, a polymer containing a cyclohexyl group and a phenyl group, and a modified product of the polymer containing a cyclohexyl group and a phenyl group is present on the surface of the positive electrode plate.Type: ApplicationFiled: October 24, 2011Publication date: May 3, 2012Applicant: SANYO ELECTRIC CO., LTD.Inventors: Masahiro Iyori, Hirofusa Tanaka, Naoki Terada, Seiji Omura, Yasuhiro Yamauchi, Toshiyuki Nohma, Masahide Miyake, Yasuyuki Kusumoto, Shigeki Matsuta, Toyoki Fujihara, Takeshi Yoshida
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Patent number: 8166794Abstract: A positive electrode active material quality judgment method that can easily and accurately judge the quality of a positive electrode active material used in a non-aqueous electrolyte secondary cell without having to complete the positive electrode. The positive electrode active material quality judgment method includes: heating a positive electrode active material mainly made of a lithium nickel composite oxide to a temperature x (° C.) of 200° C. or higher and 400° C. or lower; measuring the amount of carbon dioxide gas generated from the heating; and the positive electrode active material as a suitable positive electrode active material when the positive electrode active material satisfies formulas 3 and 4: y<(1.31x?258)/1000000(200?x<300)??formula 3 y<1.20x?225/1000000(300?x?400)??formula 4 where x is the heating temperature x (° C.) and y is the amount of carbon dioxide gas (mole/g) generated per 1 g of the positive electrode active material in the heating to the heating temperature x (° C.).Type: GrantFiled: November 11, 2008Date of Patent: May 1, 2012Assignee: SANYO Electric Co., Ltd.Inventors: Katsutoshi Takeda, Yoshio Kato, Shingo Tode, Masanori Maekawa, Shigeki Matsuta
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Patent number: 8153302Abstract: A method of producing an active material for a lithium secondary battery, by which impurities causing problems in synthesizing an active material for a lithium secondary battery, including a lithium transition metal oxyanion compound are removed efficiently and enhancement of an energy density is realized, is provided. By cleaning the active material for a lithium secondary battery, including a lithium transition metal oxyanion compound, with a pH buffer solution, for example, it is possible to efficiently remove just only impurities such as Li3PO4 or Li2CO3, or a substance, other than LiFePO4, in which the valence of Fe is bivalent such as FeSO4, FeO or Fe3(PO4)2 without dissolving Fe of LiFePO4.Type: GrantFiled: February 27, 2008Date of Patent: April 10, 2012Assignee: Sanyo Electric Co., Ltd.Inventors: Denis Yau Wai Yu, Kazunori Donoue, Toshikazu Yoshida, Tetsuo Kadohata, Tetsuyuki Murata, Shigeki Matsuta
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Publication number: 20120079712Abstract: A method of producing an active material for a lithium secondary battery, by which impurities causing problems in synthesizing an active material for a lithium secondary battery, including a lithium transition metal oxyanion compound are removed efficiently and enhancement of an energy density is realized, is provided. By cleaning the active material for a lithium secondary battery, including a lithium transition metal oxyanion compound, with a pH buffer solution, for example, it is possible to efficiently remove just only impurities such as Li3PO4 or Li2CO3, or a substance, other than LiFePO4, in which the valence of Fe is bivalent such as FeSO4, FeO or Fe3(PO4)2 without dissolving Fe of LiFePO4.Type: ApplicationFiled: December 9, 2011Publication date: April 5, 2012Inventors: Denis Yau Wai YU, Kazunori Donoue, Toshikazu Yoshida, Tetsuo Kadohata, Tetsuyuki Murata, Shigeki Matsuta
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Publication number: 20110217599Abstract: Disclosed is a nonaqueous electrolyte secondary battery which has a negative electrode containing silicon as a negative active material, a positive electrode containing a positive active material, a nonaqueous electrolyte and a separator. Characteristically, an additive which retards oxidation of silicon during operation of the battery is contained either in an interior or surface portion of the positive electrode, or in an interior or surface portion of the negative electrode, or in an interior or surface portion of the separator.Type: ApplicationFiled: April 7, 2011Publication date: September 8, 2011Inventors: Hidekazu Yamamoto, Keiji Saisho, Yoshio Kato, Shigeki Matsuta
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Publication number: 20110159344Abstract: According to the invention, there can be provided a non-aqueous electrolyte secondary cell whose capacity is hardly decreased even stored at high temperatures in a charged state. The non-aqueous electrolyte secondary cell uses an insulation adhesive tape composed of a base material and a glue material. And in an absorbance spectra of the glue material measured using an infrared spectrophotometer so that the maximum peak intensity is 5 to 20% in transmittance, when peak intensities for C—H stretching vibration of 3040 to 2835 cm?1 and C?O stretching vibration of 1870 to 1560 cm?1 are respectively defined as I(C—H) and I(C?O), a peak intensity ratio represented by I(C?O)/I(C—H) is 0.01 or less.Type: ApplicationFiled: December 23, 2010Publication date: June 30, 2011Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuma Kobayashi, Yohei Hirota, Yuki Morikawa, Yoshio Kato, Yasuyuki Kusumoto, Shigeki Matsuta