Patents by Inventor Hiroyuki Yumoto
Hiroyuki Yumoto 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: 20130273407Abstract: A non-aqueous electrochemical cell is disclosed having a heat-resistant coating on at least one of a negative electrode, a positive electrode, and a separator, if provided. The heat-resistant coating may consume heat in the cell to stabilize the cell, act as an electrical insulator to prevent the cell from short circuiting, and increase the mechanical strength and compression resistance of the coated component. In certain embodiments, the heat-resistant coating serves as a solid state electrolyte to produce a solid state electrochemical cell.Type: ApplicationFiled: May 17, 2013Publication date: October 17, 2013Inventors: Kostyantyn KYLYVNYK, Naoki OTA, Hiroyuki YUMOTO
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Patent number: 8524397Abstract: The battery has an electrolyte activating one or more anodes and one or more cathodes. At least one of the one or more cathodes includes or consists of one or more first active materials selected from the group consisting of: fluorinated carbon (CFx),CuCl2, and LiCuCl2; and includes or consists of one or more second active materials selected from the group consisting of lithium vanadium oxide, such as Li1+yV3O8, where y is greater than zero and/or less than 0.3, TiS2, polypyrrole, MoO2, MoS2, MnO2, V2O5, V6O13, H2V3O8, and metal vanadium oxides represented by MyH1?yV3O8 where 0<y?1 and M represents Na, Mg, Ba, K, Co, and Ca and combinations thereof.Type: GrantFiled: November 8, 2004Date of Patent: September 3, 2013Assignee: Quallion LLCInventors: Hiroyuki Yumoto, Taison Tan, Nelly Bourgeon, Hisashi Tsukamoto, Lu Chow
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Patent number: 8445137Abstract: The battery includes a cathode and an anode. The anode has a first medium that includes a first active material. The anode also has a second medium including a concentration gradient of a second active material. The battery also includes an electrolytic solution in contact with the cathode and the anode. In some instances, the first medium is positioned so as to protect at least a portion of the second medium from the electrolytic solution. The first medium can also be selected so as to dissipate during discharge of the battery. The first medium can be configured to dissipate enough that one or more of the protected regions of the second medium become exposed to the electrolytic solution during the discharge of the battery.Type: GrantFiled: November 20, 2003Date of Patent: May 21, 2013Assignee: Quallion LLCInventors: Taison Tan, Phuong-Nghi Lam, Hiroyuki Yumoto, Hisashi Tsukamoto, Tsuneaki Koike
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Patent number: 8168330Abstract: A method of manufacturing a lithium cell is disclosed. The method can include providing a lithium cell having an operating voltage range, where the lithium cell includes a negative electrode, a positive electrode, and an electrolyte in contact with, and between, the negative electrode and the positive electrode. The negative electrode can include lithium titanate and the electrolyte can include an additive. The method can also include reducing the additive to form a coating on a surface of the negative electrode in contact with the electrolyte. The reducing step can include overcharging the lithium cell to a voltage greater than an upper limit of the operating voltage range and dropping a voltage of the negative electrode to 0.2-1V vs. lithium.Type: GrantFiled: September 20, 2010Date of Patent: May 1, 2012Assignee: Enerdel, Inc.Inventors: Taison Tan, Hiroyuki Yumoto, Qi Zhang, Mohamed Taggougui
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Patent number: 8080329Abstract: Disclosed is an electric storage battery and method of making it, comprising a jellyroll electrode assembly in which electrodes are wound around a pin, and having one or more spacers at or near the inner ends of the electrodes to aid in winding the jellyroll. Also disclosed is an electric storage battery, and method of making it, comprising a jellyroll electrode assembly in which electrodes are wound around a pin, and having a plastic slotted tube closely fitted around the pin and covering the junction of the pin to an electrode substrate or interface material coupled to the electrode substrate. The spacers and plastic slotted tube may be used separately or together.Type: GrantFiled: March 25, 2004Date of Patent: December 20, 2011Assignee: Quallion LLCInventors: David M. Skinlo, Baljit S. Nat, Hiroyuki Yumoto
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Patent number: 7951480Abstract: An electrode system includes one or more separator materials formed into a bag having at least two seams. The seams are positioned so as to define the perimeter of a pocket configured to receive an electrode within the bag. At least one gap is formed between seams adjacent to one another along the perimeter of the pocket. Additionally, at least one of the seams includes a spacer positioned between portions of the one or more separator materials joined by the at least one seam.Type: GrantFiled: October 29, 2003Date of Patent: May 31, 2011Assignee: Quallion LLCInventors: David M. Skinlo, Hiroyuki Yumoto, David L. DeMuth
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Publication number: 20110067230Abstract: A method of manufacturing a lithium cell is disclosed. The method can include providing a lithium cell having an operating voltage range, where the lithium cell includes a negative electrode, a positive electrode, and an electrolyte in contact with, and between, the negative electrode and the positive electrode. The negative electrode can include lithium titanate and the electrolyte can include an additive. The method can also include reducing the additive to form a coating on a surface of the negative electrode in contact with the electrolyte. The reducing step can include overcharging the lithium cell to a voltage greater than an upper limit of the operating voltage range and dropping a voltage of the negative electrode to 0.2-1V vs. lithium.Type: ApplicationFiled: September 20, 2010Publication date: March 24, 2011Inventors: Taison TAN, Hiroyuki Yumoto, Qi Zhang, Mohamed Taggougui
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Patent number: 7820327Abstract: An active material suitable for use in lithium cells comprises lithium titanate having a surface and a material disposed on the surface is provided. The material is non-reactive with an electrolyte within a range of potential vs. lithium of from 0 V to 4 V. A variety of lithium cells including lithium titanate are also provided. The lithium titanate is typically of the general formula: Li4Ti5O12-x, wherein x is greater than 0. Further, a cell module is provided. The cell module comprises a plurality of lithium cells each having a soft outer packaging and assembled in an environment where water content in the environment is controlled.Type: GrantFiled: January 17, 2008Date of Patent: October 26, 2010Assignee: EnerDel, Inc.Inventors: Hiroyuki Yumoto, Taison Tan, Derrick Buck
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Patent number: 7740986Abstract: The battery has an electrolyte that includes an organoborate additive and one or more salts in a solvent. The organoborate additive can be present in a concentration less than 0.2 M or less than 0.05 M. A molar ratio of the organoborate additive:one or more salts is in a range of 4:1 to 400:1. In some instances, the solvent includes one or more organic solvents.Type: GrantFiled: February 17, 2005Date of Patent: June 22, 2010Assignee: Quallion LLCInventors: Hiroyuki Yumoto, Nelly Bourgeon, Taison Tan, Phuong-Nghi Lam
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Patent number: 7572554Abstract: An electrolyte for a battery comprises a lithium organoborate salt in a lactone and a low viscosity solvent. The lithium organoborate salt may comprise LiBOB, or a mono[bidentate]borate salt. The lactone may comprise gamma butyrolactone. The low viscosity solvent may comprise a nitrile, an ether, a linear carbonate, or a linear ester. The electrolyte is suitable for use in lithium ion batteries having graphite negative electrodes. Batteries using this electrolyte have high conductivity, low polarization, and high discharge capacity.Type: GrantFiled: March 3, 2005Date of Patent: August 11, 2009Assignee: Quallion LLCInventors: Tsuneaki Koike, Hiroyuki Yumoto, Hisashi Tsukamoto
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Patent number: 7503943Abstract: Disclosed is an improved type of fluorinated carbon (CFx) for use in electrical storage devices such as batteries and capacitors. The CFx is coated with a conductive material such as gold or carbon using vapor deposition. The resulting material exhibits better conductivity with concomitant lower impedance, higher electrical stability, and improved potential throughout the useful life of the device, as compared to uncoated CFx. The improved conductivity reduces the amount of nonactive material (e.g., carbon black) that needs to be added, thus improving the volumetric energy density. In addition, cells made with the subject CFx exhibit more constant voltages and higher overall voltage (2.0 volts with a lithium metal anode) throughout their useful life. Chemical or physical vapor deposition techniques to deposit a variety of metals or carbon may be used to create the improved CFx. The coated CFx may be used in primary or secondary batteries, as well as capacitors and hybrid devices.Type: GrantFiled: March 22, 2006Date of Patent: March 17, 2009Assignee: Quallion LLCInventors: Hisashi Tsukamoto, Kaname Takeya, Hiroyuki Yumoto, M. Elizabeth Bush
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Patent number: 7488553Abstract: An electric storage battery and method of manufacture thereof characterized by a feed through pin (12) which is internally directly physically and electrically connected to an inner end of a positive electrode substrate (32). A C-shaped mandrel (48) extends around the pin and substrate end enabling the pin/mandrel to be used during the manufacturing process as an arbor to facilitate winding layers of a spiral jellyroll electrode assembly. The pin additionally extends from the battery case (101) and in the final product constitutes one of the battery terminals (14) with the battery case comprising the other terminal. The electrolyte is injected through the open end of the case after the end cap is welded to the negative electrode but before sealing the end cap to the case. The electrolyte is preferably injected through the C-shaped mandrel to facilitate and speed filling.Type: GrantFiled: January 15, 2003Date of Patent: February 10, 2009Assignee: Quallion LLCInventors: Hisashi Tsukamoto, Andrew Szyszkowski, David M. Skinlo, Mikito Nagata, Hiroyuki Yumoto
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Publication number: 20080274400Abstract: A battery assembly includes a plurality of battery cells. Each cell includes a plurality of first electrodes and second electrodes. First and second insulators extend over the first and second electrodes. An envelope or shell extends over the first and second insulators thereby encapsulating the first and second insulators. A lithium energy control electronics device (the LEC) is disposed, i.e. integrated inside the shell of each cell of the battery assembly. Each cell of the battery assembly is electronically and operatively communicated with one another through the respective LEC disposed inside each cell.Type: ApplicationFiled: June 28, 2007Publication date: November 6, 2008Inventors: Jeff Dixon, Chad Hartzog, Hiroyuki Yumoto
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Publication number: 20080226987Abstract: An active material suitable for use in lithium cells comprises lithium titanate having a surface and a material disposed on the surface is provided. The material is non-reactive with an electrolyte within a range of potential vs. lithium of from 0 V to 4 V. A variety of lithium cells including lithium titanate are also provided. The lithium titanate is typically of the general formula: Li4Ti5O12-x, wherein x is greater than 0. Further, a cell module is provided. The cell module comprises a plurality of lithium cells each having a soft outer packaging and assembled in an environment where water content in the environment is controlled.Type: ApplicationFiled: January 17, 2008Publication date: September 18, 2008Inventors: Hiroyuki Yumoto, Taison Tan, Derrick Buck
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Patent number: 7416811Abstract: An electric storage battery and method of manufacture thereof. Active material (78) is removed from both sides of the outer end (88) of the negative electrode (70) in a jellyroll (84) to allow room for adhesive tape (96) to secure the jellyroll.Type: GrantFiled: January 15, 2003Date of Patent: August 26, 2008Assignee: Quallion LLCInventors: Hiroshi Nakahara, Mikito Nagata, David M. Skinlo, Hisashi Tsukamoto, Hiroyuki Yumoto
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Publication number: 20080076023Abstract: A lithium cell (cell) suitable for use in a battery pack comprises a housing, first and second electrodes of opposite charge disposed and spaced from each other in the housing. The first electrode comprises a first active component and the second electrode comprises a second active component different from the first active component. The cell further comprises first and second current collectors disposed and spaced from each other in the housing. The first and second current collectors are in electrical communication with the first and second electrodes, respectively. The cell further comprises a separator disposed in the housing between the first and second electrodes.Type: ApplicationFiled: September 21, 2007Publication date: March 27, 2008Inventor: Hiroyuki Yumoto
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Patent number: 7348099Abstract: A nonaqueous secondary electrolytic battery comprising an electricity-generating element formed by spirally winding a laminate of a positive electrode plate, a separating material and a negative electrode plate, and an electrolytic solution with which the separating material, if it is a separator, is impregnated. The electricity-generating element is sealed in a battery case formed by a resin-laminated sheet comprising a metal layer as a barrier layer. Only a pair of lead terminals are drawn to the exterior of the battery case. The resin sheet comprises an oriented resin layer laminated on both surfaces of the metal layer. The inner heat-fused layers are opposed and heat-fused to each other. A molten and solidified resin mass is formed protruding from the inner end of the welded portion toward the inner space of the battery by 0.1 mm or more. Alternatively, the welded portion is formed thinner at the outer end thereof than at the inner end thereof.Type: GrantFiled: October 26, 2006Date of Patent: March 25, 2008Assignee: GS Yuasa CorporationInventors: Hiroshi Mukai, Tetsuya Murai, Shinya Kitano, Mikio Okada, Hiroshi Nakahara, Mikito Nagata, Hiroyuki Yumoto
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Patent number: 7285355Abstract: A lithium ion battery configured to yield a high energy density output by minimizing head space, i.e., wasted interior volume, within the battery case and/or by reducing electrical energy losses internal to the battery.Type: GrantFiled: April 29, 2003Date of Patent: October 23, 2007Assignee: Quallion LLCInventors: Alan Ruth, Andy Szyszkowski, Clay Kishiyama, Hiroyuki Yumoto, Hisashi Tsukamoto
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Patent number: 7267904Abstract: A nonaqueous secondary electrolytic battery comprising an electricity-generating element formed by spirally winding a laminate of a positive electrode plate, a separating material and a negative electrode plate, and an electrolytic solution with which the separating material, if it is a separator, is impregnated. The electricity-generating element is sealed in a battery case formed by a resin-laminated sheet comprising a metal layer as a barrier layer. Only a pair of lead terminals are drawn to the exterior of the battery case. The resin sheet comprises an oriented resin layer laminated on both surfaces of the metal layer. The inner heat-fused layers are opposed and heat-fused to each other. A molten and solidified resin mass is formed protruding from the inner end of the welded portion toward the inner space of the battery by 0.1 mm or more. Alternatively, the welded portion is formed thinner at the outer end thereof than at the inner end thereof.Type: GrantFiled: November 14, 2003Date of Patent: September 11, 2007Assignee: GS Yuasa CorporationInventors: Shigeo Komatsu, Hiroshi Mukai, Tetsuya Murai, Shinya Kitano, Mikio Okada, Hiroshi Nakahara, Mikito Nagata, Hiroyuki Yumoto
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Publication number: 20070065727Abstract: An electrolyte for a battery comprises a lithium organoborate salt in a lactone and a low viscosity solvent. The lithium organoborate salt may comprise LiBOB. The lactone may comprise gamma butyrolactone. The low viscosity solvent may comprise a nitrile, an ether, a linear carbonate, or a linear ester. The electrolyte is suitable for use in lithium ion batteries having graphite negative electrodes. Batteries using this electrolyte have high conductivity, low polarization, and high discharge capacity.Type: ApplicationFiled: March 3, 2005Publication date: March 22, 2007Inventors: Tsuneaki Koike, Hiroyuki Yumoto, Hisashi Tsukamoto