Patents by Inventor Yoshihiro Dokko
Yoshihiro Dokko 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: 10541389Abstract: A battery is provided. The battery includes a power generation element having a through hole; and a cylindrical can housing the power generation element and having at least one thin wall part on a circumferential surface of the cylindrical can. A ratio of a hole diameter of the through hole to an outer diameter of the power generation element is 17% or less. The thin wall part is provided in one or both of regions in a range from 0% to 30% and a range from 70% to 100% from one end of the circumferential surface.Type: GrantFiled: April 18, 2018Date of Patent: January 21, 2020Assignee: Murata Manufacturing Co., Ltd.Inventors: Mitsuhiro Ue, Yoshihiro Dokko, Takaaki Matsui
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Publication number: 20180241012Abstract: A battery is provided. The battery includes a power generation element having a through hole; and a cylindrical can housing the power generation element and having at least one thin wall part on a circumferential surface of the cylindrical can. A ratio of a hole diameter of the through hole to an outer diameter of the power generation element is 17% or less. The thin wall part is provided in one or both of regions in a range from 0% to 30% and a range from 70% to 100% from one end of the circumferential surface.Type: ApplicationFiled: April 18, 2018Publication date: August 23, 2018Inventors: Mitsuhiro UE, Yoshihiro DOKKO, Takaaki MATSUI
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Patent number: 8206844Abstract: A battery with improved safety that can more surely short-circuit electrodes when flattened out by the external force is provided. A center pin (30) is inserted in the center of a spirally wound electrode body formed by layering and spirally winding a cathode and an anode with a separator in between. The center pin (30) has a cut line (31) provided in the longitudinal direction and a first cutout (32) vertically crossing the cut line (31). When flattened out by the external force, a corner (33) at an intersection of the cut line (31) and the first cutout (32) is projected, and short-circuit is surely generated. Further, it is preferable that the center pin (30) has a second cutout (34) in the direction perpendicular to the cut line (31) in a position facing the cut line (31) in the circumferential direction.Type: GrantFiled: November 1, 2005Date of Patent: June 26, 2012Assignee: Sony CorporationInventors: Takeshi Meguro, Yoshihiro Dokko, Hiroyuki Suzuki, Tadashi Miebori, Shinji Hatake, Yuzuru Fukushima
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Patent number: 7972717Abstract: A battery with improved safety which can establish a short circuit between electrodes more reliably when the battery is crushed by an external force is provided. A battery includes a battery element including a cathode and an anode, a battery can containing the battery element, and a conductive short circuit member arranged in a gap between the battery element and the battery can, the short circuit member capable of biting into the battery element when the battery can is deformed.Type: GrantFiled: January 5, 2007Date of Patent: July 5, 2011Assignee: Sony CorporationInventors: Takeshi Meguro, Yoshihiro Dokko, Hiroyuki Suzuki, Tadashi Miebori, Shinji Hatake, Yuzuru Fukushima, Noriaki Kokubu
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Patent number: 7550225Abstract: A battery capable of preventing deformation thereof when gas is generated is provided. In the battery, a safety valve is electrically connected to a battery element, and an insulating plate is arranged between the battery element and the safety valve. The safety valve has a plurality of vent holes around a central portion thereof. The insulating plate has seven or more openings in the circumferential direction in a position where the openings can face to the vent holes of the safety valves around a central portion thereof.Type: GrantFiled: January 23, 2007Date of Patent: June 23, 2009Assignee: Sony CorporationInventors: Takeshi Meguro, Yoshihiro Dokko
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Patent number: 7432010Abstract: A battery, which can inhibit raise of an internal resistance even when temperature change or mechanical shock is applied, and which has superior productivity is provided. A safety mechanism and a battery cover are installed at an open part of a battery case by caulking through a gasket. Inside of the battery case is sealed. A flange part of the battery cover contacts with a flange part of a safety valve of the safety mechanism. A surface roughness of the contact face is set to be in the range from about 0.5 ?m to about 5.5 ?m based on an arithmetic average roughness Ra. A contact resistance between the battery cover and the safety valve is thereby reduced. Further, a maximum height Ry of the contact face is preferably in the range from about 8.0 ?m to about 50.0 ?M.Type: GrantFiled: September 14, 2004Date of Patent: October 7, 2008Assignee: Sony CorporationInventor: Yoshihiro Dokko
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Publication number: 20080107957Abstract: A battery capable of preventing deformation thereof when gas is generated is provided. In the battery, a safety valve is electrically connected to a battery element, and an insulating plate is arranged between the battery element and the safety valve. The safety valve has a plurality of vent holes around a central portion thereof. The insulating plate has seven or more openings in the circumferential direction in a position where the openings can face to the vent holes of the safety valves around a central portion thereof.Type: ApplicationFiled: January 23, 2007Publication date: May 8, 2008Inventors: Takeshi Meguro, Yoshihiro Dokko
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Publication number: 20070269711Abstract: A battery with improved safety that can more surely short-circuit electrodes when flattened out by the external force is provided. A center pin (30) is inserted in the center of a spirally wound electrode body formed by layering and spirally winding a cathode and an anode with a separator in between. The center pin (30) has a cut line (31) provided in the longitudinal direction and a first cutout (32) vertically crossing the cut line (31). When flattened out by the external force, a corner (33) at an intersection of the cut line (31) and the first cutout (32) is projected, and short-circuit is surely generated. Further, it is preferable that the center pin (30) has a second cutout (34) in the direction perpendicular to the cut line (31) in a position facing the cut line (31) in the circumferential direction.Type: ApplicationFiled: November 1, 2005Publication date: November 22, 2007Applicant: Sony CorporationInventors: Takeshi Meguro, Yoshihiro Dokko, Hiroyuki Suzuki, Tadashi Miebori, Shinji Hatake, Yuzuru Fukushima
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Publication number: 20070166605Abstract: A battery with improved safety which can establish a short circuit between electrodes more reliably when the battery is crushed by an external force is provided. A battery includes a battery element including a cathode and an anode, a battery can containing the battery element, and a conductive short circuit member arranged in a gap between the battery element and the battery can, the short circuit member capable of biting into the battery element when the battery can is deformed.Type: ApplicationFiled: January 5, 2007Publication date: July 19, 2007Applicant: Sony CorporationInventors: Takeshi Meguro, Yoshihiro Dokko, Hiroyuki Suzuki, Tadashi Miebori, Shinji Hatake, Yuzuru Fukushima, Noriaki Kokubu
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Publication number: 20060121341Abstract: A nonaqueous electrolyte secondary battery includes a wound electrode body structured by spirally winding electrodes with a separator in between, the electrode having a strip shape and being formed by forming a mixture layer on a current collector having a strip shape, a hollow cylindrical center pin that is inserted into a center hole of the wound electrode body, and a battery can, in which the wound electrode body having the center pin inserted therein is stored. The center pin is formed in such a way that the center pin does not crash by a force equal to 34N or less.Type: ApplicationFiled: January 20, 2006Publication date: June 8, 2006Inventors: Kenichiro Hosoda, Yoshihiro Dokko
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Publication number: 20050058898Abstract: A battery, which can inhibit raise of an internal resistance even when temperature change or mechanical shock is applied, and which has superior productivity is provided. A safety mechanism and a battery cover are installed at an open part of a battery case by caulking through a gasket. Inside of the battery case is sealed. A flange part of the battery cover contacts with a flange part of a safety valve of the safety mechanism. A surface roughness of the contact face is set to be in the range from about 0.5 ?m to about 5.5 ?m based on an arithmetic average roughness Ra. A contact resistance between the battery cover and the safety valve is thereby reduced. Further, a maximum height Ry of the contact face is preferably in the range from about 8.0 ?m to about 50.0 ?M.Type: ApplicationFiled: September 14, 2004Publication date: March 17, 2005Inventor: Yoshihiro Dokko
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Publication number: 20030215700Abstract: A nonaqueous electrolyte secondary battery includes a wound electrode body structured by spirally winding electrodes with a separator in between, the electrode having a strip shape and being formed by forming a mixture layer on a current collector having a strip shape, a hollow cylindrical center pin that is inserted into a center hole of the wound electrode body, and a battery can, in which the wound electrode body having the center pin inserted therein is stored. The center pin is formed in such a way that the center pin does not crash by a force equal to 34N or less.Type: ApplicationFiled: April 2, 2003Publication date: November 20, 2003Inventors: Kenichiro Hosoda, Yoshihiro Dokko