Patents by Inventor Hirotaka Hayashida
Hirotaka Hayashida 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).
-
Patent number: 10741896Abstract: According to an embodiment, there is provided a battery system. The battery system includes a first battery and a second battery connected in parallel with the first battery. The first battery includes a lead storage battery. The second battery includes a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a positive electrode and a negative electrode. The negative electrode includes a negative-electrode-mixture layer, and the negative-electrode-mixture layer contains lithium titanate. The positive electrode contains a positive electrode active material LiMn2-xM(a)xO4. A ratio of a battery capacity of the second battery to a battery capacity of the first battery is in a range of 1/133 to 1/2.Type: GrantFiled: September 9, 2015Date of Patent: August 11, 2020Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Haruchika Ishii, Kazuya Kuriyama, Toshihide Arikawa, Hirotada Tahara, Masataka Shikota, Hiroki Inagaki, Yuichi Kikuma, Kengo Kurata, Hirotaka Hayashida, Yoshinao Tatebayashi
-
Patent number: 9627715Abstract: A non-aqueous electrolyte secondary battery of an embodiment includes an exterior member, a negative electrode containing a titanium-containing oxide housed in the exterior member, a positive electrode housed in the exterior member, a separator housed in the exterior member and arranged between the positive electrode and the negative electrode, and a non-aqueous electrolyte solution housed in the exterior member. At least one type or more chain carbonates are contained in a solvent of the non-aqueous electrolyte solution. A self-diffusion coefficient of the chain carbonate in ?20° C. is front 1.4×10?10 to 2.0×10?10 m2/sec.Type: GrantFiled: September 11, 2014Date of Patent: April 18, 2017Assignee: Kabushiki Kaisha ToshibaInventors: Dai Yamamoto, Hidesato Saruwatari, Masanori Tanaka, Kazuya Kuriyama, Hideki Satake, Hirotaka Hayashida
-
Publication number: 20160261004Abstract: A non-aqueous electrolyte secondary battery of an embodiment includes an exterior member, a negative electrode containing a titanium-containing oxide housed in the exterior member, a positive electrode housed in the exterior member, a separator housed in the exterior member and arranged between the positive electrode and the negative electrode, and a non-aqueous electrolyte solution housed in the exterior member. At least one type or more chain carbonates are contained in a solvent of the non-aqueous electrolyte solution. A self-diffusion coefficient of the chain carbonate in ?20° C. is front 1.4×10?10 to 2.0×10?10 m/sec.Type: ApplicationFiled: September 11, 2014Publication date: September 8, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Dai YAMAMOTO, Hidesato Saruwatari, Masanori Tanaka, Kazuya Kuriyama, Hideki Satake, Hirotaka Hayashida
-
Publication number: 20150380787Abstract: According to an embodiment, there is provided a battery system. The battery system includes a first battery and a second battery connected in parallel with the first battery. The first battery includes a lead storage battery. The second battery includes a nonaqueous electrolyte battery. The nonaqueous electrolyte battery includes a positive electrode and a negative electrode. The negative electrode includes a negative-electrode-mixture layer, and the negative-electrode-mixture layer contains lithium titanate. The positive electrode contains a positive electrode active material LiMn2-x(a)xO4. A ratio of a battery capacity of the second battery to a battery capacity of the first battery is in a range of 1/133 to 1/2.Type: ApplicationFiled: September 9, 2015Publication date: December 31, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Haruchika ISHII, Kazuya KURIYAMA, Toshihide ARIKAWA, Hirotada TAHARA, Masataka SHIKOTA, Hiroki INAGAKI, Yuichi KlKUMA, Kengo KURATA, Hirotaka HAYASHIDA, Yoshinao TATEBAYASHI
-
Patent number: 8530081Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly having a high-density positive electrode in which a positive electrode active material layer is formed on at least one surface of a positive electrode current collector, a high-density negative electrode in which a negative electrode active material layer is formed on at least one surface of a negative electrode current collector, and a separator interposed between the positive and negative electrodes, and has a structure in which the electrode assembly is impregnated with a nonaqueous electrolyte, wherein the specific surface area per unit area of the positive electrode active material layer of the positive electrode is 0.5 to 1.0 times the specific surface area per unit area of the negative electrode active material layer of the negative electrode which opposes the positive electrode with the separator sandwiched between them.Type: GrantFiled: March 25, 2009Date of Patent: September 10, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Hirotaka Hayashida, Akira Yajima
-
Patent number: 7981541Abstract: The invention provides a nonaqueous electrolyte secondary battery excellent in output characteristic such as large current discharge or pulse discharge in ordinary use, high in safety by preventing destruction due to suppression of current in an abnormality such as external short-circuiting, and further large in capacity. The nonaqueous electrolyte secondary battery comprises an external can opened at one end thereof, an electrode assembly contained in the external can, and comprising a negative electrode, a separator and a positive electrode, a nonaqueous electrolyte contained in the external can, and a sealing lid group tightly sealed at the opening of the external can by way of an insulating member, wherein the sealing lid group includes an intact plate-like PTC element having a fragile portion to be easily broken due to elevation of internal pressure by gas generation.Type: GrantFiled: February 7, 2008Date of Patent: July 19, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Yuuichi Sato, Kengou Kurata, Hirotaka Hayashida
-
Publication number: 20090181310Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly having a high-density positive electrode in which a positive electrode active material layer is formed on at least one surface of a positive electrode current collector, a high-density negative electrode in which a negative electrode active material layer is formed on at least one surface of a negative electrode current collector, and a separator interposed between the positive and negative electrodes, and has a structure in which the electrode assembly is impregnated with a nonaqueous electrolyte, wherein the specific surface area per unit area of the positive electrode active material layer of the positive electrode is 0.5 to 1.0 times the specific surface area per unit area of the negative electrode active material layer of the negative electrode which opposes the positive electrode with the separator sandwiched between them.Type: ApplicationFiled: March 25, 2009Publication date: July 16, 2009Inventors: Hirotaka Hayashida, Akira Yajima
-
Patent number: 7501207Abstract: The present invention provides a hydrogen absorbing alloy containing as a principal phase at least one phase selected from the group consisting of a second phase having a rhombohedral crystal structure and a first phase having a crystal structure of a hexagonal system excluding a phase having a CaCu5 type structure, wherein a content of a phase having a crystal structure of AB2 type is not higher than 10% by volume including 0% by volume and the hydrogen absorbing alloy has a composition represented by general formula (1) given below: R1-a-bMgaTbNiZ-X-Y-?M1XM2YMn???(1).Type: GrantFiled: April 25, 2007Date of Patent: March 10, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Isao Sakai, Tatsuoki Kohno, Shirou Takeno, Takamichi Inaba, Hideki Yoshida, Masaaki Yamamoto, Hirotaka Hayashida, Shusuke Inada, Hiroshi Kitayama, Motoya Kanda, Fumiyuki Kawashima, Takao Sawa
-
Publication number: 20080131769Abstract: The invention provides a nonaqueous electrolyte secondary battery excellent in output characteristic such as large current discharge or pulse discharge in ordinary use, high in safety by preventing destruction due to suppression of current in an abnormality such as external short-circuiting, and further large in capacity. The nonaqueous electrolyte secondary battery comprises an external can opened at one end thereof, an electrode assembly contained in the external can, and comprising a negative electrode, a separator and a positive electrode, a nonaqueous electrolyte contained in the external can, and a sealing lid group tightly sealed at the opening of the external can by way of an insulating member, wherein the sealing lid group includes an intact plate-like PTC element having a fragile portion to be easily broken due to elevation of internal pressure by gas generation.Type: ApplicationFiled: February 7, 2008Publication date: June 5, 2008Inventors: Yuuichi SATO, Kengou Kurata, Hirotaka Hayashida
-
Patent number: 7300720Abstract: The present invention provides a hydrogen absorbing alloy containing as a principal phase at least one phase selected from the group consisting of a second phase having a rhombohedral crystal structure and a first phase having a crystal structure of a hexagonal system excluding a phase having a CaCu5 type structure, wherein a content of a phase having a crystal structure of AB2 type is not higher than 10% by volume including 0% by volume and the hydrogen absorbing alloy has a composition represented by general formula (1) given below: R1-a-bMgaTbNiZ-X-Y-?M1XM2YMn?.Type: GrantFiled: December 1, 2005Date of Patent: November 27, 2007Assignee: Kabushiki Kaisha ToshibaInventors: Isao Sakai, Tatsuoki Kohno, Shirou Takeno, Takamichi Inaba, Hideki Yoshida, Masaaki Yamamoto, Hirotaka Hayashida, Shusuke Inada, Hiroshi Kitayama, Motoya Kanda, Fumiyuki Kawashima, Takao Sawa
-
Publication number: 20070259264Abstract: The present invention provides a hydrogen absorbing alloy containing as a principal phase at least one phase selected from the group consisting of a second phase having a rhombohedral crystal structure and a first phase having a crystal structure of a hexagonal system excluding a phase having a CaCu5 type structure, wherein a content of a phase having a crystal structure of AB2 type is not higher than 10% by volume including 0% by volume and the hydrogen absorbing alloy has a composition represented by general formula (1) given below: R1-a-bMgaTbNiZ-X-Y-?M1XM2YMn???(1)Type: ApplicationFiled: April 25, 2007Publication date: November 8, 2007Inventors: Isao Sakai, Tatsuoki Kohno, Shirou Takeno, Takamichi Inaba, Hideki Yoshida, Masaaki Yamamoto, Hirotaka Hayashida, Shusuke Inada, Hiroshi Kitayama, Motoya Kanda, Fumiyuki Kawashima, Takao Sawa
-
Publication number: 20070190417Abstract: The present invention provides a hydrogen absorbing alloy containing as a principal phase at least one phase selected from the group consisting of a second phase having a rhombohedral crystal structure and a first phase having a crystal structure of a hexagonal system excluding a phase having a CaCu5 type structure, wherein a content of a phase having a crystal structure of AB2 type is not higher than 10% by volume including 0% by volume and the hydrogen absorbing alloy has a composition represented by general formula (1) given below: R1-a-bMgaTbNiZ-X-Y-?M1XM2YMn???(1)Type: ApplicationFiled: April 25, 2007Publication date: August 16, 2007Inventors: Isao Sakai, Tatsuoki Kohno, Shirou Takeno, Takamichi Inaba, Hideki Yoshida, Masaaki Yamamoto, Hirotaka Hayashida, Shusuke Inada, Hiroshi Kitayama, Motoya Kanda, Fumiyuki Kawashima, Takao Sawa
-
Publication number: 20060254678Abstract: The present invention provides a hydrogen absorbing alloy containing as a principal phase at least one phase selected from the group consisting of a second phase having a rhombohedral crystal structure and a first phase having a crystal structure of a hexagonal system excluding a phase having a CaCu5 type structure, wherein a content of a phase having a crystal structure of AB2 type is not higher than 10% by volume including 0% by volume and the hydrogen absorbing alloy has a composition represented by general formula (1) given below: R1-a-bMgaTbNiZ-X-Y-?M1XM2YMn???(1)Type: ApplicationFiled: December 1, 2005Publication date: November 16, 2006Inventors: Isao Sakai, Tatsuoki Kohno, Shirou Takeno, Takamichi Inaba, Hideki Yoshida, Masaaki Yamamoto, Hirotaka Hayashida, Shusuke Inada, Hiroshi Kitayama, Motoya Kanda, Fumiyuki Kawashima, Takao Sawa
-
Publication number: 20060078787Abstract: The invention provides a nonaqueous electrolyte secondary battery excellent in output characteristic such as large current discharge or pulse discharge in ordinary use, high in safety by preventing destruction due to suppression of current in an abnormality such as external short-circuiting, and further large in capacity. The nonaqueous electrolyte secondary battery comprises an external can opened at one end thereof, an electrode assembly contained in the external can, and comprising a negative electrode, a separator and a positive electrode, a nonaqueous electrolyte contained in the external can, and a sealing lid group tightly sealed at the opening of the external can by way of an insulating member, wherein the sealing lid group includes an intact plate-like PTC element having a fragile portion to be easily broken due to elevation of internal pressure by gas generation.Type: ApplicationFiled: October 4, 2005Publication date: April 13, 2006Inventors: Yuuichi Sato, Kengou Kurata, Hirotaka Hayashida
-
Publication number: 20060051669Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly having a high-density positive electrode in which a positive electrode active material layer is formed on at least one surface of a positive electrode current collector, a high-density negative electrode in which a negative electrode active material layer is formed on at least one surface of a negative electrode current collector, and a separator interposed between the positive and negative electrodes, and has a structure in which the electrode assembly is impregnated with a nonaqueous electrolyte, wherein the specific surface area per unit area of the positive electrode active material layer of the positive electrode is 0.5 to 1.0 times the specific surface area per unit area of the negative electrode active material layer of the negative electrode which opposes the positive electrode with the separator sandwiched between them.Type: ApplicationFiled: October 7, 2005Publication date: March 9, 2006Inventors: Hirotaka Hayashida, Akira Yajima
-
Patent number: 7005212Abstract: The present invention provides a hydrogen absorbing alloy containing as a principal phase at least one phase selected from the group consisting of a second phase having a rhombohedral crystal structure and a first phase having a crystal structure of a hexagonal system excluding a phase having a CaCu5 type structure, wherein a content of a phase having a crystal structure of AB2 type is not higher than 10% by volume including 0% by volume and the hydrogen absorbing alloy has a composition represented by general formula (1) given below: R1-a-bMgaTbNiZ-X-Y-?M1XM2YMn?.Type: GrantFiled: June 27, 2002Date of Patent: February 28, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Isao Sakai, Tatsuoki Kohno, Shirou Takeno, Takamichi Inaba, Hideki Yoshida, Masaaki Yamamoto, Hirotaka Hayashida, Shusuke Inada, Hiroshi Kitayama, Motoya Kanda, Fumiyuki Kawashima, Takao Sawa
-
Publication number: 20050053833Abstract: A nonaqueous electrolyte secondary battery includes an electrode assembly having a high-density positive electrode in which a positive electrode active material layer is formed on at least one surface of a positive electrode current collector, a high-density negative electrode in which a negative electrode active material layer is formed on at least one surface of a negative electrode current collector, and a separator interposed between the positive and negative electrodes, and has a structure in which the electrode assembly is impregnated with a nonaqueous electrolyte, wherein the specific surface area per unit area of the positive electrode active material layer of the positive electrode is 0.5 to 1.0 times the specific surface area per unit area of the negative electrode active material layer of the negative electrode which opposes the positive electrode with the separator sandwiched between them.Type: ApplicationFiled: October 12, 2004Publication date: March 10, 2005Inventors: Hirotaka Hayashida, Akira Yajima
-
Patent number: 6703164Abstract: There is provided a hydrogen-absorbing alloy comprising, as a principal phase, at least one kind of phase selected from the group consisting of a first phase having a hexagonal crystal system (excluding a phase having a CaCu5 type crystal structure) and a second phase having a rhombohedral crystal system, the hydrogen-absorbing alloy having a composition represented by the following general formula (1): R1-a-bMgaTbNiZ-X-Y-&agr;M1XM2YMn&agr; (1) wherein R is at least one kind of element selected from rare earth elements (which include Y), T is at least one element selected from the group consisting of Ca, Ti, Zr and Hf, M1 is at least one element selected from the group consisting of Co and Fe, M2 is at least one element selected from the group consisting of Al, Ga, Zn, Sn, Cu, Si, B, Nb, W, Mo, V, Cr, Ta, Li, P and S, and the atomic ratios of a, b, X, Y, &agr; and Z are respectively a number satisfying the conditions of: 0.15≦a≦0.37, 0≦b≦0.3, 0≦X≦1.3, 0≦Y≦0.Type: GrantFiled: June 4, 2001Date of Patent: March 9, 2004Assignee: Kabushiki Kaisha ToshibaInventors: Hirotaka Hayashida, Masaaki Yamamoto, Hiroshi Kitayama, Shusuke Inada, Isao Sakai, Tatsuoki Kono, Hideki Yoshida, Takamichi Inaba, Motoya Kanda
-
Publication number: 20030096164Abstract: The present invention provides a hydrogen absorbing alloy containing as a principal phase at least one phase selected from the group consisting of a second phase having a rhombohedral crystal structure and a first phase having a crystal structure of a hexagonal system excluding a phase having a CaCu5 type structure, wherein a content of a phase having a crystal structure of AB2 type is not higher than 10% by volume including 0% by volume and the hydrogen absorbing alloy has a composition represented by general formula (1) given below:Type: ApplicationFiled: June 27, 2002Publication date: May 22, 2003Inventors: Isao Sakai, Tatsuoki Kohno, Shirou Takeno, Takamichi Inaba, Hideki Yoshida, Masaaki Yamamoto, Hirotaka Hayashida, Shusuke Inada, Hiroshi Kitayama, Motoya Kanda, Fumiyuki Kawashima, Takao Sawa
-
Patent number: 6399247Abstract: A nickel-metal hydride secondary battery comprising electrode group comprising positive electrode comprised mainly of nickel hydroxide, negative electrode comprised mainly of a hydrogen storage alloy, and separator being disposed between the positive electrode and the negative electrode, wherein the electrode group is sealed in battery casing, together with an alkali electrolyte liquid, wherein, in the battery, a W element and an Na element are present simultaneously. The nickel-metal hydride secondary battery of the present invention is advantageous not only in that it exhibits high utilization of the active material and excellent self-discharge characteristics in a high temperature storage as well as high charging efficiency in a high temperature environment, but also in that it has excellent large current discharge characteristics.Type: GrantFiled: February 25, 2000Date of Patent: June 4, 2002Assignees: Toshiba Battery Co., Ltd., Kabushiki Kaisha ToshibaInventors: Hiroshi Kitayama, Hirotaka Hayashida, Masaaki Yamamoto, Naomi Bando, Kunihiko Miyamoto, Hideharu Suzuki