Patents by Inventor Yukiyoshi Ueno
Yukiyoshi Ueno 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).
-
Publication number: 20230264597Abstract: An in-vehicle system includes a first battery and a second battery respectively connected to a first load and a second load, a relay that connects the two batteries in parallel, and a processor configured to control turn-on and turn-off of the relay to control a state of electric power supply from the first and second batteries to the first and second loads, detect an abnormality in the first and second batteries, and determine a difference between physical quantities of the two batteries. The processor is further configured to, when detecting the abnormality in the first or second battery, turn off the relay, and when no longer detecting the abnormality in the first and second batteries after the relay is turned off, turn on the relay when the processor determines that the difference between the physical quantities of the two batteries satisfies a predetermined condition.Type: ApplicationFiled: December 21, 2022Publication date: August 24, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yukiyoshi UENO
-
Patent number: 11201330Abstract: A power storage device electrode includes a layered structure having an organic framework layer containing aromatic dicarboxylic acid anions and an alkali metal element layer in which alkali metal elements are coordinated to oxygen atoms contained in the carboxylic acid anion to form a framework as an electrode active material, and in the whole of the electrode active material, a conductive material and a water-soluble polymer, carboxymethyl cellulose as the water-soluble polymer is contained in a range of 1.5 mass % or more and 3.5 mass % or less. In addition, the layered structure is produced by a spray drying method, and the peak intensity ratio when the power storage device electrode is subjected to X-ray diffraction measurement satisfies a predetermined range.Type: GrantFiled: September 26, 2019Date of Patent: December 14, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Nobuhiro Ogihara, Osamu Hiruta, Yukiyoshi Ueno
-
Patent number: 10720671Abstract: A nonaqueous electrolyte secondary battery includes a wound electrode assembly in which a positive electrode having, at its one end in a width direction, a positive electrode exposed portion provided without a positive electrode mixture layer on a positive electrode current collector and a negative electrode are wound together, with a separator interposed therebetween. The positive electrode exposed portion protrudes outward in an axial direction of the wound electrode assembly relative to the separator and the negative electrode at one end in the axial direction of the wound electrode assembly. The negative electrode exposed portion protrudes outward in the axial direction of the wound electrode assembly relative to the separator and the positive electrode at the other end in the axial direction. The positive electrode exposed portion has a cutout portion at least in an outermost circumferential portion of the positive electrode.Type: GrantFiled: November 20, 2015Date of Patent: July 21, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya Umeyama, Yukiyoshi Ueno, Kaoru Inoue, Hideki Sano
-
Publication number: 20200106100Abstract: A power storage device electrode includes a layered structure having an organic framework layer containing aromatic dicarboxylic acid anions and an alkali metal element layer in which alkali metal elements are coordinated to oxygen atoms contained in the carboxylic acid anion to form a framework as an electrode active material, and in the whole of the electrode active material, a conductive material and a water-soluble polymer, carboxymethyl cellulose as the water-soluble polymer is contained in a range of 1.5 mass % or more and 3.5 mass % or less. In addition, the layered structure is produced by a spray drying method, and the peak intensity ratio when the power storage device electrode is subjected to X-ray diffraction measurement satisfies a predetermined range.Type: ApplicationFiled: September 26, 2019Publication date: April 2, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Nobuhiro OGIHARA, Osamu HIRUTA, Yukiyoshi UENO
-
Patent number: 10424816Abstract: A lithium-ion secondary battery (100) includes a wound electrode body (80), a nonaqueous electrolyte, and a box-shaped case (50). The wound electrode body includes a positive electrode (10), a negative electrode (20), and a separator (40). The box-shaped case contains the wound electrode body and the nonaqueous electrolyte. The wound electrode body includes a starting-end-side negative electrode remainder portion (22) provided in a winding-direction starting end portion (81) of the wound electrode body. The winding-direction starting end portion exists at a winding center side. The starting-end-side negative electrode remainder portion protrudes toward the winding center side along a winding direction beyond the positive electrode. A surplus nonaqueous electrolyte exists in a gap between the wound electrode body and the box-shaped case.Type: GrantFiled: November 27, 2014Date of Patent: September 24, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi Ueno, Tomoyuki Mizuno, Kunimitsu Yamamoto, Junko Ohira, Kaoru Inoue, Hideaki Fujita, Hideki Sano
-
Patent number: 10317477Abstract: An inspection method of a secondary battery includes a charging step, an aging step, a pre-inspection discharge step, a voltage adjustment step, a self-discharge inspection step, and a deficiency determination step. A discharge condition in the pre-inspection discharge step is determined so that a voltage difference accumulation value Vs satisfies a predetermined range. The voltage difference accumulation value Vs is calculated by accumulating a value obtained by subtracting an output voltage from a predetermined voltage over a duration from start of the pre-inspection discharge step to end thereof.Type: GrantFiled: March 19, 2015Date of Patent: June 11, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi Ueno, Junko Ohira
-
Patent number: 10249915Abstract: A method of manufacturing a nonaqueous secondary battery includes: constructing a battery assembly with a positive electrode, a negative electrode, and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution containing an unsaturated carbonate; activating the battery assembly to decompose a portion of the unsaturated carbonate such that a percentage of the unsaturated carbonate is adjusted to be 0.9 mass % or less with respect to 100 mass % of a total amount of the nonaqueous electrolytic solution; self-discharging the battery assembly to measure a voltage drop amount; and determining whether internal short-circuit occurs in the battery assembly based on the voltage drop amount.Type: GrantFiled: July 10, 2015Date of Patent: April 2, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi Ueno, Yuuichi Ito, Kunimitu Yamamoto, Junko Ohira
-
Patent number: 10224564Abstract: A nonaqueous electrolyte secondary battery includes a wound electrode body, and the wound electrode body includes two curved portions and a center flat portion which has flat surfaces. A positive electrode winding end, a negative electrode winding end, and separator winding ends are positioned on the same curved portion. The negative electrode winding end is arranged at an advanced position from the positive electrode winding end in a winding direction, and at least one of the separator winding ends is positioned at an advanced position from the negative electrode winding end in the winding direction. A distance a (mm) from the negative electrode winding end to the separator winding end and a distance b (mm) from the positive electrode winding end to the negative electrode winding end satisfy relationships 0.5?a×(a+b)?104 and 0?b?11.Type: GrantFiled: June 20, 2016Date of Patent: March 5, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya Umeyama, Yukiyoshi Ueno, Hideki Sano
-
Patent number: 10186711Abstract: The invention relates to methods of preparing metal particles on a support material, including platinum-containing nanoparticles on a carbon support. Such materials can be used as electrocatalysts, for example as improved electrocatalysts in proton exchange membrane fuel cells (PEM-FCs).Type: GrantFiled: November 21, 2013Date of Patent: January 22, 2019Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Motor Corporation, Sandia CorporationInventors: Tochi Tudor Nwoga, Kazuo Kawahara, Wen Li, Yujiang Song, John A. Shelnutt, James E. Miller, Craig John Medforth, Yukiyoshi Ueno, Tetsuo Kawamura
-
Patent number: 10026989Abstract: An Object of the invention is to obtain an all solid lithium battery having an excellent output performance. To achieve the object, a sulfide based solid electrolyte is used as an electrolyte; an oxide containing lithium, a metal element that acts as a redox couple, and a metal element that forms an electron-insulating oxide is used as a cathode active material; and the concentration of the metal element that forms the electron-insulating oxide on the surface of the cathode active material (oxide) that is in contact with the sulfide solid electrolyte is made high.Type: GrantFiled: March 23, 2011Date of Patent: July 17, 2018Assignees: NATIONAL INSTITUTE FOR MATERIALS SCIENCE, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazunori Takada, Xiaoxiong Xu, Tsuyoshi Ohnishi, Isao Sakaguchi, Ken Watanabe, Yasushi Tsuchida, Yukiyoshi Ueno, Koji Kawamoto
-
Patent number: 9966638Abstract: A manufacturing method for a non-aqueous secondary battery includes the following steps. (a) Preparing an electrode body including a positive electrode having a positive electrode active material layer and a negative electrode having a negative electrode active material layer. (b) Constructing a battery assembly using the electrode body and a non-aqueous electrolyte. (c) Initially charging the battery assembly. (d) Aging the battery assembly at a temperature of 60° C. or higher. (e) Forcibly starting to discharge the battery assembly in said temperature region after lowering the temperature of the battery assembly down to a temperature region of 35° C. or higher and 55° C. or lower. (f) Adjusting the SOC of the battery assembly. (g) Measuring a voltage drop amount by self-discharging the battery assembly. And (h) determining whether or not the battery assembly is qualified based on the voltage drop amount.Type: GrantFiled: November 5, 2014Date of Patent: May 8, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi Ueno, Junko Ohira
-
Patent number: 9960452Abstract: A method of producing a nonaqueous secondary battery includes: preparing an electrode body (S10); constructing a battery assembly with the electrode body and a nonaqueous electrolyte (S20); initially charging the battery assembly (S30); aging the battery assembly at 40° C. or higher (S40); adjusting an SOC of the battery assembly (S60), wherein, the adjusting the SOC is performed such that a residual capacity percentage of the battery assembly is 11.5% or more and 14% or less; self-discharging the battery assembly and measuring a voltage drop amount (S70); and determining a quality of the battery assembly based on the voltage drop amount (S80).Type: GrantFiled: November 6, 2014Date of Patent: May 1, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi Ueno, Junko Ohira
-
Publication number: 20170346138Abstract: A nonaqueous electrolyte secondary battery includes a wound electrode assembly in which a positive electrode having, at its one end in a width direction, a positive electrode exposed portion provided without a positive electrode mixture layer on a positive electrode current collector and a negative electrode are wound together, with a separator interposed therebetween. The positive electrode exposed portion protrudes outward in an axial direction of the wound electrode assembly relative to the separator and the negative electrode at one end in the axial direction of the wound electrode assembly. The negative electrode exposed portion protrudes outward in the axial direction of the wound electrode assembly relative to the separator and the positive electrode at the other end in the axial direction. The positive electrode exposed portion has a cutout portion at least in an outermost circumferential portion of the positive electrode.Type: ApplicationFiled: November 20, 2015Publication date: November 30, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Yukiyoshi UENO, Kaoru INOUE, Hideki SANO
-
Patent number: 9812742Abstract: A manufacturing method according to the present invention is a method for manufacturing a nonaqueous electrolyte secondary battery including graphite as a negative-electrode active material. The manufacturing method includes: a step of assembling the battery including a positive electrode and a negative electrode; and a step of performing an initial charging process of performing first charging on the battery. In the initial charging process, charging is performed at a relatively large first current value when a gas generation amount caused in the battery during the charging does not depend on a charging current value, and the charging is performed at a second current value smaller than the first current value when the gas generation amount depends on the charging current value.Type: GrantFiled: February 20, 2015Date of Patent: November 7, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kunimitsu Yamamoto, Yukiyoshi Ueno, Tomoyuki Mizuno, Junko Ohira
-
Publication number: 20170170530Abstract: A method of manufacturing a nonaqueous secondary battery includes: constructing a battery assembly with a positive electrode, a negative electrode, and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution containing an unsaturated carbonate; activating the battery assembly to decompose a portion of the unsaturated carbonate such that a percentage of the unsaturated carbonate is adjusted to be 0.9 mass % or less with respect to 100 mass % of a total amount of the nonaqueous electrolytic solution; self-discharging the battery assembly to measure a voltage drop amount; and determining whether internal short-circuit occurs in the battery assembly based on the voltage drop amount.Type: ApplicationFiled: July 10, 2015Publication date: June 15, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi UENO, Yuuichi ITO, Kunimitu YAMAMOTO, Junko OHIRA
-
Publication number: 20170162912Abstract: A lithium-ion secondary battery (100) includes a wound electrode body (80), a nonaqueous electrolyte, and a box-shaped case (50). The wound electrode body includes a positive electrode (10), a negative electrode (20), and a separator (40). The box-shaped case contains the wound electrode body and the nonaqueous electrolyte. The wound electrode body includes a starting-end-side negative electrode remainder portion (22) provided in a winding-direction starting end portion (81) of the wound electrode body. The winding-direction starting end portion exists at a winding center side. The starting-end-side negative electrode remainder portion protrudes toward the winding center side along a winding direction beyond the positive electrode. A surplus nonaqueous electrolyte exists in a gap between the wound electrode body and the box-shaped case.Type: ApplicationFiled: November 27, 2014Publication date: June 8, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi UENO, Tomoyuki MIZUNO, Kunimitsu YAMAMOTO, Junko OHIRA, Kaoru INOUE, Hideaki FUJITA, Hideki SANO
-
Publication number: 20170149088Abstract: A method of manufacturing a nonaqueous secondary battery includes: constructing a battery assembly with a positive electrode, a negative electrode, and a nonaqueous electrolytic solution, the nonaqueous electrolytic solution containing a sulfonic acid compound having a triple bond; activating the battery assembly to decompose a portion of the sulfonic acid compound such that a percentage of the sulfonic acid compound is more than 0 mass % and 0.2 mass % or less with respect to 100 mass % of a total amount of the nonaqueous electrolytic solution; self-discharging the battery assembly to measure a voltage drop amount; and determining whether internal short-circuit occurs in the battery assembly based on the voltage drop amount.Type: ApplicationFiled: July 14, 2015Publication date: May 25, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi UENO, Yuichi ITO, Kunimitsu YAMAMOTO, Junko OHIRA
-
Patent number: 9608295Abstract: A lithium-ion secondary battery (10) includes a wound electrode assembly (40) having a positive electrode current collector foil (51) and a negative electrode current collector foil 61). An edge portion (52) of the positive electrode current collector foil (51) is exposed in a spiral form at one end of a winding axis (WL). An edge portion (62) of the negative electrode current collector foil (61) is exposed in a spiral form at the other end of the winding axis (WL). The spirally exposed edge portion (52) of the positive electrode current collector foil (51) is divided and gathered into a plurality of parts divided at at least one of a plurality of gaps (S), excluding a central portion (WC) containing the winding axis (WL), provided between wound layers of the positive electrode current collector foil (51) stacked in a direction orthogonal to the winding axis (WL).Type: GrantFiled: January 5, 2015Date of Patent: March 28, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi Ueno, Hideki Sano, Kaoru Inoue, Hideaki Fujita
-
Publication number: 20170030975Abstract: An inspection method of a secondary battery includes a charging step, an aging step, a pre-inspection discharge step, a voltage adjustment step, a self-discharge inspection step, and a deficiency determination step. A discharge condition in the pre-inspection discharge step is determined so that a voltage difference accumulation value Vs satisfies a predetermined range. The voltage difference accumulation value Vs is calculated by accumulating a value obtained by subtracting an output voltage from a predetermined voltage over a duration from start of the pre-inspection discharge step to end thereof.Type: ApplicationFiled: March 19, 2015Publication date: February 2, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukiyoshi UENO, Junko OHIRA
-
Publication number: 20160380299Abstract: A nonaqueous electrolyte secondary battery includes a wound electrode body, and the wound electrode body includes two curved portions and a center flat portion which has flat surfaces. A positive electrode winding end, a negative electrode winding end, and separator winding ends are positioned on the same curved portion. The negative electrode winding end is arranged at an advanced position from the positive electrode winding end in a winding direction, and at least one of the separator winding ends is positioned at an advanced position from the negative electrode winding end in the winding direction. A distance a (mm) from the negative electrode winding end to the separator winding end and a distance b (mm) from the positive electrode winding end to the negative electrode winding end satisfy relationships 0.5?a×(a+b)?104 and 0?b?11.Type: ApplicationFiled: June 20, 2016Publication date: December 29, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroya UMEYAMA, Yukiyoshi UENO, Hideki SANO