Patents by Inventor Yasutaka Kogetsu
Yasutaka Kogetsu 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: 11502338Abstract: A winding-type battery includes a battery case, a power generating element, a cap for blocking an opening of the battery case, and a gasket for insulating the battery case from the cap. The power generating element includes a first electrode, a second electrode, a separator interposed between them, and an electrolyte. The first electrode and the second electrode are wound via the separator to form an electrode group, and the first electrode is connected to the cap via a first current collecting lead, and the second electrode is connected to the battery case via a second current collecting lead. A groove is formed near the opening end of the battery case. The gasket includes: an annular seal portion interposed between a rim of the cap and the region from the groove to the end; and a tubular portion that is integrated with the seal portion, and is disposed closer to the electrode group than the seal portion is. The first current collecting lead is connected to the cap through a hollow in the tubular portion.Type: GrantFiled: March 10, 2020Date of Patent: November 15, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Teruhisa Miura, Koki Inoue, Akira Kakinuma, Katsuhisa Wadasaki, Yasutaka Kogetsu, Yuki Suehiro
-
Patent number: 10727468Abstract: A battery includes: an electrode group including a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode; an electrolyte; a container for accommodating the electrode group and the electrolyte; a sealing member for blocking an opening in the container; and a first lead for electrically connecting the first electrode to the sealing member. The first lead has a weld region welded to the sealing member, and the weld region has at least one first bump along the longitudinal direction of the first lead. The cross section of the boundary between the weld region and a non-weld region on the first electrode side has a projecting shape corresponding to the bump.Type: GrantFiled: November 21, 2016Date of Patent: July 28, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Sadayuki Okazaki, Yasutaka Kogetsu, Katsuhisa Wadasaki, Suguru Matsumura
-
Publication number: 20200212503Abstract: A winding-type battery includes a battery case, a power generating element, a cap for blocking an opening of the battery case, and a gasket for insulating the battery case from the cap. The power generating element includes a first electrode, a second electrode, a separator interposed between them, and an electrolyte. The first electrode and the second electrode are wound via the separator to form an electrode group, and the first electrode is connected to the cap via a first current collecting lead, and the second electrode is connected to the battery case via a second current collecting lead. A groove is formed near the opening end of the battery case. The gasket includes: an annular seal portion interposed between a rim of the cap and the region from the groove to the end; and a tubular portion that is integrated with the seal portion, and is disposed closer to the electrode group than the seal portion is. The first current collecting lead is connected to the cap through a hollow in the tubular portion.Type: ApplicationFiled: March 10, 2020Publication date: July 2, 2020Inventors: Teruhisa MIURA, Koki INOUE, Akira KAKINUMA, Katsuhisa WADASAKI, Yasutaka KOGETSU, Yuki SUEHIRO
-
Patent number: 10680229Abstract: A battery includes: an electrode group including a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode; an electrolyte; a container for accommodating the electrode group and the electrolyte; a sealing member for blocking an opening in the container; and a first lead for electrically connecting the first electrode to the sealing member. The first lead has a weld region welded to the sealing member, and the weld region has at least one first bump along the longitudinal direction of the first lead. The cross section of the boundary between the weld region and a non-weld region on the first electrode side has a projecting shape corresponding to the bump.Type: GrantFiled: November 21, 2016Date of Patent: June 9, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Sadayuki Okazaki, Yasutaka Kogetsu, Katsuhisa Wadasaki, Suguru Matsumura
-
Patent number: 10637102Abstract: A winding-type battery includes a battery case, a power generating element, a cap for blocking an opening of the battery case, and a gasket for insulating the battery case from the cap. The first electrode is connected to the cap via a first current collecting lead, and the second electrode is connected to the battery case via a second current collecting lead. A groove is formed near the opening end of the battery case. The gasket includes: an annular seal portion interposed between a rim of the cap and the region from the groove to the end; and a tubular portion that is integrated with the seal portion, and is disposed closer to the electrode group than the seal portion is. The first current collecting lead is connected to the cap through a hollow in the tubular portion.Type: GrantFiled: July 19, 2016Date of Patent: April 28, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Teruhisa Miura, Koki Inoue, Akira Kakinuma, Katsuhisa Wadasaki, Yasutaka Kogetsu, Yuki Suehiro
-
Patent number: 10566598Abstract: A winding-type battery includes an electrode group that is formed by winding a first electrode and a second electrode via a separator and has a first end surface and a second end surface. The first electrode includes a first current collector sheet, and a first active material layer formed on its surface. The second electrode includes a second current collector sheet, and a second active material layer formed on its surface. The first current collector sheet includes, at its end disposed on the first end surface of the electrode group, a first uncoated portion having no first active material layer on either surface thereof. An edge surface of the first uncoated portion is at least partially covered with an insulating layer, and an end of the insulating layer projects more than an end of the separator on the first end surface.Type: GrantFiled: June 15, 2016Date of Patent: February 18, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yasutaka Kogetsu, Sadayuki Okazaki, Katsuhisa Wadasaki, Yuki Suehiro
-
Patent number: 10305077Abstract: A small cylindrical lithium-ion secondary battery provided with a safety mechanism that enables internal pressure to be released when an anomaly occurs. The battery includes an electrode group formed of a positive electrode and a negative electrode that are wound or stacked with a separator interposed therebetween, an electrolytic solution, a battery case that contains the electrode group and the electrolytic solution, and a sealing body. The battery case has an outer diameter of 10 mm or less. The sealing body includes a ring having a through-hole and includes a sheet-like or film-like valve member disposed such that the valve member covers the through-hole of the ring, and a safety mechanism that causes the valve member to cleave when the internal pressure reaches a predetermined pressure is disposed therein. The ring includes protrusions formed of linear ridge lines that protrude toward an inside of the through-hole.Type: GrantFiled: May 27, 2015Date of Patent: May 28, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MGMT CO., LTD.Inventors: Noriyuki Uchida, Yasutaka Kogetsu, Koki Inoue, Tsutomu Nishioka
-
Publication number: 20180342724Abstract: A battery includes: an electrode group including a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode; an electrolyte; a container for accommodating the electrode group and the electrolyte; a sealing member for blocking an opening in the container; and a first lead for electrically connecting the first electrode to the sealing member. The first lead has a weld region welded to the sealing member, and the weld region has at least one first bump along the longitudinal direction of the first lead. The cross section of the boundary between the weld region and a non-weld region on the first electrode side has a projecting shape corresponding to the bump.Type: ApplicationFiled: November 21, 2016Publication date: November 29, 2018Inventors: SADAYUKI OKAZAKI, YASUTAKA KOGETSU, KATSUHISA WADASAKI, SUGURU MATSUMURA
-
Publication number: 20180183109Abstract: A winding-type battery includes a battery case, a power generating element, a cap for blocking an opening of the battery case, and a gasket for insulating the battery case from the cap. The first electrode is connected to the cap via a first current collecting lead, and the second electrode is connected to the battery case via a second current collecting lead. A groove is formed near the opening end of the battery case. The gasket includes: an annular seal portion interposed between a rim of the cap and the region from the groove to the end; and a tubular portion that is integrated with the seal portion, and is disposed closer to the electrode group than the seal portion is. The first current collecting lead is connected to the cap through a hollow in the tubular portion.Type: ApplicationFiled: July 19, 2016Publication date: June 28, 2018Inventors: TERUHISA MIURA, KOKI INOUE, AKIRA KAKINUMA, KATSUHISA WADASAKI, YASUTAKA KOGETSU, YUKI SUEHIRO
-
Publication number: 20180145304Abstract: A winding-type battery includes an electrode group that is formed by winding a first electrode and a second electrode via a separator and has a first end surface and a second end surface. The first electrode includes a first current collector sheet, and a first active material layer formed on its surface. The second electrode includes a second current collector sheet, and a second active material layer formed on its surface. The first current collector sheet includes, at its end disposed on the first end surface of the electrode group, a first uncoated portion having no first active material layer on either surface thereof. An edge surface of the first uncoated portion is at least partially covered with an insulating layer, and an end of the insulating layer projects more than an end of the separator on the first end surface.Type: ApplicationFiled: June 15, 2016Publication date: May 24, 2018Inventors: YASUTAKA KOGETSU, SADAYUKI OKAZAKI, KATSUHISA WADASAKI, YUKI SUEHIRO
-
Publication number: 20170141370Abstract: A small cylindrical lithium-ion secondary battery provided with a safety mechanism that enables internal pressure to be released when an anomaly occurs. The battery includes an electrode group formed of a positive electrode and a negative electrode that are wound or stacked with a separator interposed therebetween, an electrolytic solution, a battery case that contains the electrode group and the electrolytic solution, and a sealing body. The battery case has an outer diameter of 10 mm or less. The sealing body includes a ring having a through-hole and includes a sheet-like or film-like valve member disposed such that the valve member covers the through-hole of the ring, and a safety mechanism that causes the valve member to cleave when the internal pressure reaches a predetermined pressure is disposed therein. The ring includes protrusions formed of linear ridge lines that protrude toward an inside of the through-hole.Type: ApplicationFiled: May 27, 2015Publication date: May 18, 2017Applicant: PANASONIC INTELLECTUAL PROPERTY MGMT CO., LTD.Inventors: Noriyuki Uchida, Yasutaka Kogetsu, Koki Inoue, Tsutomu Nishioka
-
Patent number: 9620768Abstract: A negative electrode 1 for lithium secondary batteries, which can increase the charge/discharge capacity of a lithium secondary battery, includes a negative electrode current collector, a negative electrode active material layer, and a lithium layer. The negative electrode active material layer is disposed on regions and of the respective surfaces and of the negative electrode current collector. The lithium layer is disposed on uncovered regions and, which are regions of the respective surfaces and of the negative electrode current collector on which the negative electrode active material layer is not disposed. The lithium layer includes lithium.Type: GrantFiled: May 20, 2013Date of Patent: April 11, 2017Assignee: SANYO Electric Co., Ltd.Inventors: Yasutaka Kogetsu, Kunihiko Bessho, Takashi Shimada
-
Publication number: 20150147656Abstract: A negative electrode 1 for lithium secondary batteries, which can increase the charge/discharge capacity of a lithium secondary battery, includes a negative electrode current collector, a negative electrode active material layer, and a lithium layer. The negative electrode active material layer is disposed on regions and of the respective surfaces and of the negative electrode current collector. The lithium layer is disposed on uncovered regions and, which are regions of the respective surfaces and of the negative electrode current collector on which the negative electrode active material layer is not disposed. The lithium layer includes lithium.Type: ApplicationFiled: May 20, 2013Publication date: May 28, 2015Applicant: SANYO Electric Co., Ltd.Inventors: Yasutaka Kogetsu, Kunihiko Bessho, Takashi Shimada
-
Patent number: 9023530Abstract: To improve high temperature storage characteristic of a non-aqueous electrolyte secondary battery suitable for high input/output application, the structure of a positive electrode active material is optimized. The non-aqueous electrolyte secondary battery includes a positive electrode; a negative electrode; a separator interposed between the positive and negative electrodes; and a non-aqueous electrolyte. The positive electrode active material includes secondary particles, each formed of an aggregate of primary particles. A value (VPr) defined by the formula: VPr=(1?C/D)/(A2×B3) is not less than 0.0005 and not greater than 0.04, where an average particle size of the primary particles is A ?m, an average particle size of the positive electrode active material is B ?m, a tap density of the positive electrode active material is C g/ml, and a true specific gravity of the positive electrode active material is D g/ml.Type: GrantFiled: March 9, 2006Date of Patent: May 5, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Takaya Saito, Yasutaka Kogetsu, Takashi Takeuchi, Hidekazu Hiratsuka
-
Patent number: 8986882Abstract: The present invention relates to a current collector including a base portion with a flat face, primary projections projecting from the flat face, and secondary projections projecting from the top of the primary projections. The present invention also relates to a current collector including a base portion with a flat face and primary projections projecting from the flat face, wherein the roughening rate of the top of the primary projections is 3 to 20. By using such a current collector, separation of the active material from the current collector can be inhibited when using an active material that has a high capacity but undergoes a large expansion at the time of lithium ion absorption.Type: GrantFiled: December 26, 2007Date of Patent: March 24, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Shuji Ito, Yasutaka Kogetsu, Kazuya Iwamoto, Kazuyoshi Honda, Taisuke Yamamoto, Yasuhiro Ueyama, Keisuke Ohara, Hitoshi Katayama
-
Patent number: 8888870Abstract: In order to enhance charge and discharge efficiency and to improve cycle characteristics by increasing a facing area between a positive electrode active material and a negative electrode active material, in a negative electrode for lithium secondary battery having a current collector and an active material layer carried on the current collector, the active material layer includes a plurality of columnar particles. The columnar particles include an element of silicon, and are tilted toward the normal direction of the current collector. Angle ? formed between the columnar particles and the normal direction of the current collector is preferably 10°??<90°.Type: GrantFiled: October 4, 2011Date of Patent: November 18, 2014Assignee: Panasonic CorporationInventors: Yasutaka Kogetsu, Masaya Ugaji, Keiichi Takahashi, Shinji Mino, Nobuaki Nagao, Satoshi Shibutani, Kazuyoshi Honda
-
Patent number: 8771874Abstract: The negative electrode for a lithium secondary battery includes: a current collector 11 having a plurality of bumps 11a on a surface thereof; a first active material layer formed on the current collector 11; and a second active material layer 15 disposed on the first active material layer 12 and including a plurality of active material particles 14. Each of the plurality of active material particles 14 is located on a corresponding bump 11a of the current collector 11, and each of the first active material layer 12 and the plurality of active material particles 14 has a chemical composition represented as SiOx (0<x<1).Type: GrantFiled: March 13, 2008Date of Patent: July 8, 2014Assignee: Panasonic CorporationInventors: Taisuke Yamamoto, Kazuya Iwamoto, Yasutaka Kogetsu
-
Patent number: 8399129Abstract: A negative electrode for a lithium secondary battery of the present invention includes a current collector and a negative electrode active material layer carried on the current collector. The negative electrode active material layer includes a plurality of columnar particles. The current collector has a surface including a depression and a plurality of projected regions defined by the depression. The projected regions carry the columnar particles. Further, the present invention relates to a lithium secondary battery using the foregoing negative electrode. According to the present invention, it is possible to provide a high-capacity negative electrode excellent mainly in cycle characteristics for a lithium secondary battery, and a lithium secondary battery including the same.Type: GrantFiled: October 2, 2007Date of Patent: March 19, 2013Assignee: Panasonic CorporationInventors: Masaya Ugaji, Masaki Hasegawa, Taisuke Yamamoto, Keisuke Ohara, Yasutaka Kogetsu, Takuhiro Nishimura
-
Patent number: 8389156Abstract: This invention provides a negative electrode and a non-aqueous electrolyte secondary battery including the negative electrode. The negative electrode includes a Li-absorbing element as a negative electrode active material, is free from deformation, separation of the negative electrode active material layer from the negative electrode current collector, and deposition of lithium on the negative electrode current collector, and is excellent in cycle characteristic, large-current discharge characteristic, and low-temperature discharge characteristic. The negative electrode of this invention includes: a current collector having depressions and protrusions on a surface in the thickness direction thereof; and a negative electrode active material layer that includes a plurality of columns containing a negative electrode active material that absorbs and releases lithium ions, the columns being grown outwardly from the surface of the current collector.Type: GrantFiled: August 22, 2007Date of Patent: March 5, 2013Assignee: Panasonic CorporationInventors: Katsumi Kashiwagi, Kazuyoshi Honda, Masaki Hasegawa, Masaya Ugaji, Yasutaka Kogetsu, Shuji Ito
-
Electrode for lithium secondary battery, lithium secondary battery and method for producing the same
Patent number: 8318359Abstract: An electrode for a lithium secondary battery including a sheet-like current collector and an active material layer carried on the current collector. The active material layer is capable of absorbing and desorbing lithium, and the active material layer includes a plurality of columnar particles having at least one bend. An angle ?1 formed by a growth direction of the columnar particles from a bottom to a first bend of the columnar particles, and a direction normal to the current collector is preferably 10° or more and less than 90°. When ?n+1 is an angle formed by a growth direction of the columnar particles from an n-th bend counted from a bottom of the columnar particles to an (n+1)-th bend, and the direction normal to the current collector, and n is an integer of 1 or more, ?n+1 is preferably 0° or more and less than 90°.Type: GrantFiled: November 7, 2006Date of Patent: November 27, 2012Assignee: Panasonic CorporationInventors: Keiichi Takahashi, Masaya Ugaji, Yasutaka Kogetsu, Shinji Mino, Nobuaki Nagao, Masaki Hasegawa