Patents by Inventor Takeshi Ogasawara

Takeshi Ogasawara 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: 20220255074
    Abstract: Provided is a cathode active material for a non-aqueous-electrolyte secondary battery, the cathode active material containing a lithium composite oxide that has a layered structure containing a Li layer and that is represented by general formula LiaNi?Al?Co?M?SrxO2-w (in the formula, 0.95<a<1.05, 0.85???0.95, 0<??0.08, 0???0.1, 0???0.15, 0<x?0.015, 0?w<0.05, ?+?+?+?=1, and M is at least one type of element selected from Mn, Fe, Ti, Si, Nb, Zr, Mo, and Zn), wherein the proportions of metal elements present in the Li layer excluding Li are in the range of 1-2.5 mol % with respect to the total molar quantity of metal elements in the lithium composite oxide excluding Li.
    Type: Application
    Filed: June 23, 2020
    Publication date: August 11, 2022
    Applicants: Panasonic Corporation, SANYO Electric Co., Ltd.
    Inventors: Yoshinori Aoki, Shun Nomura, Takeshi Ogasawara
  • Publication number: 20220246911
    Abstract: This positive electrode active substance for a non-aqueous electrolyte secondary battery contains: a lithium-containing transition metal oxide having secondary particles formed by aggregation of primary particles; and at least a tungsten compound and a boron compound that are present between primary particles. The present invention is characterized in that: the amount of tungsten element eluted when the positive electrode active substance is washed for 5 minutes with a 0.01 mol/L aqueous solution of sodium hydroxide is 60% or less of the amount of tungsten element detected when the positive electrode active substance is dissolved in a mixed acid containing hydrofluoric acid, nitric acid and hydrochloric acid; and the amount of boron element eluted when the positive electrode active substance is washed for 1 minute with ion exchanged water is 80% or more of the amount of boron element detected when the positive electrode active substance is dissolved in hydrochloric acid.
    Type: Application
    Filed: March 9, 2020
    Publication date: August 4, 2022
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yuji Goshima, Takeshi Ogasawara, Akihiro Kawakita
  • Publication number: 20220231292
    Abstract: A positive electrode active material characterized by containing a lithium transition metal compound that contains, relative to the total number of moles of metal elements other than Li, from 80% by mole to 94% mole (inclusive) of Ni and from 0.1% by mole to 0.6% by mole (inclusive) of Nb, and the amount of Nb (n1) in a first sample solution is obtained by adding 0.2 g of the lithium transition metal compound into an aqueous hydrochloric acid solution composed of 5 mL of pure water and 5 mL of 35% hydrochloric acid and the amount of Nb (n2) in a second sample solution that is obtained by immersing a filter that is used for filtration of the first sample solution into a fluoronitric acid composed of 5 mL of 46% hydrofluoric acid and 5 mL of 63% nitric acid satisfy the condition 75%?n1/(n1+n2)<100% in terms of moles.
    Type: Application
    Filed: June 16, 2020
    Publication date: July 21, 2022
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Toshinobu Kanai, Takeshi Ogasawara, Tetsuo Kadohata
  • Publication number: 20220209229
    Abstract: This positive electrode for a nonaqueous electrolyte secondary battery is provided with: a positive electrode active material including lithium composite oxide particles containing not less than 80 mol % but less than 100 mol % of Ni with respect to the total number of moles of metal elements other than Li; and a conductive material, wherein the lithium composite oxide particles include particles each having a step-like structure with three or more stacked flat surfaces having an outer edge length of 1 ?m or more, and the average particle size of the conductive material is 30 nm or less.
    Type: Application
    Filed: February 5, 2020
    Publication date: June 30, 2022
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Manabu Takijiri, Takeshi Ogasawara, Motoharu Saito, Yoshinori Aoki
  • Patent number: 11362320
    Abstract: A positive electrode active material which predominantly includes lithium transition metal composite oxide particles containing Ni and Al, and which has a low charge transfer resistance and thus allows the battery capacity to be increased. The composite oxide particles contain 5 mol % or more Al relative to the total molar amount of metal elements except Li, include a particle core portion and an Al rich region on or near the surface of the composite oxide particle wherein the Al concentration in the particle core portion is not less than 3 mol % and the Al concentration in the Al rich region is 1.3 times or more greater than the Al concentration in the particle core portion. The composite oxide particles contain 0.04 mol % or more sulfate ions relative to the total molar amount of the particles.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: June 14, 2022
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takaya Tochio, Takeshi Ogasawara
  • Patent number: 11328793
    Abstract: Methods and systems for accelerated input data conversion include partially parsing an input data set to convert the data set from a first format to a second format in an intermediate output having at least one unparsed portion to quickly perform a majority of the conversion. The partial parsing operates on portions of the input data set having a size less than a threshold size and leaves portions of the input data having a size greater than the threshold size unparsed. The intermediate output is parsed to convert at least one unparsed portion from the first format to the second format in a final output to complete the conversion such that a combined parsing time of the partial parse of the input data set and the parse of the intermediate output is accelerated relative to a single-stage parsing.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: May 10, 2022
    Assignee: International Business Machines Corporation
    Inventors: Safa Messaoud, Takeshi Ogasawara
  • Patent number: 11276856
    Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries includes: secondary particles composed of aggregated primary particles of a lithium composite oxide containing Ni: a rare earth compound attached to the surfaces of the secondary particles; a tungsten compound attached to the surfaces of the secondary particles: and lithium carbonate attached to the surfaces of the primary particles inside the secondary particles. The rate of Ni in the lithium composite oxide containing Ni with respect to the total number of moles of metal elements other than lithium in the lithium composite oxide containing Ni is 80 percent by mole or more, and the content of the lithium carbonate with respect to the total mass of the lithium composite oxide containing Ni is 0.3 percent by mass or more.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: March 15, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akihiro Kawakita, Takeshi Ogasawara
  • Publication number: 20220069300
    Abstract: Positive electrode active material contains: a lithium transition metal oxide that has a layered structure and contains Ni, Nb and a metal element other than Nb having a valence of at least four, also Co as an optional element; and external additive particles that contain at least one element selected from among W, B and Al and are adhered to the particle surface of the lithium transition metal oxide. The percentage of Ni, Nb and Co with respect to the total quantity of metal elements excluding Li in the lithium transition metal oxide satisfy the following ranges: 90 mol. %?Ni<100 mol. %, 0 mol. %<Nb?3 mol. %, and Co?2 mol. %. The percentages of W, B and Al in the external additive particles with respect to the total quantity of the lithium transition metal oxide fall within the range of 0.01 mol. % to 0.3 mol. %.
    Type: Application
    Filed: January 16, 2020
    Publication date: March 3, 2022
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takaya Tochio, Yoshinori Aoki, Akihiro Kawakita, Yuji Goshima, Takeshi Ogasawara
  • Publication number: 20220052334
    Abstract: According to one embodiment, a positive electrode active material for a non-aqueous electrolyte secondary battery contains a lithium/transition metal composite oxide that contains 80 mol % or more, relative to the total mol number of metal elements other than Li, of Ni and at least one kind of metal element selected from among Co, Mn, Al, W, Mg, Mo, Nb, Ti, Si and Zr. When a filtrate of a suspension, said suspension being prepared by adding 250 mg of the positive electrode active material to 10 mL of a 17.5 mass % aqueous solution of hydrochloric acid, dissolving by heating at 90° C. for 2 hours and then diluting to 50 mL, is analyzed by inductively coupled plasma mass spectrometry, the elution amount of S in the filtrate is 0.002 mmol or greater.
    Type: Application
    Filed: September 19, 2019
    Publication date: February 17, 2022
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Noriko Fukamichi, Toshinobu Kanai, Takeshi Ogasawara
  • Publication number: 20220033276
    Abstract: A method for producing a positive electrode active substance for a non-aqueous electrolyte secondary battery is characterized by including: a washing step for washing a lithium-containing transition metal oxide with water and then dehydrating the same so as to obtain a cake-like composition; a tungsten addition step for adding at least a tungsten compound or a tungsten-containing solution to the cake-like composition so as to obtain a tungsten-added product; a first heat treatment step for heat treating the tungsten-added product at a temperature of 180° C. or lower; and a second heat treatment step for heat treating the tungsten-added product in an atmosphere other than a reducing atmosphere at a temperature of higher than 180° C. to 330° C. This method is further characterized by including a boron addition step for adding a boron compound or a boron-containing solution to the cake-like composition.
    Type: Application
    Filed: January 21, 2020
    Publication date: February 3, 2022
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Akihiro Kawakita, Takeshi Ogasawara, Yuji Goshima
  • Publication number: 20210408538
    Abstract: A positive electrode active material for batteries wherein the ratio of Ni, the ratio of Nb and the ratio of Co relative to the total amount of metal elements excluding Li in a lithium transition metal oxide are respectively within the range of 90 mol %?Ni<100 mol %, the range of 0 mol %<Nb?3 mol % and the range of Co?2 mol %; the ratio of metal elements excluding Li in a Li layer of a layered structure relative to the total amount of metal elements excluding Li in the lithium transition metal oxide is within the range of from 0.9 mol % to 2.5 mol % (inclusive); and regarding the lithium transition metal oxide, the half-value width n of the diffraction peak of the (208) plane of the X-ray diffraction pattern as determined by X-ray diffractometry is within the range of 0.30°?n?0.50°.
    Type: Application
    Filed: October 31, 2019
    Publication date: December 30, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yoshinori Aoki, Takeshi Ogasawara, Takaya Tochio
  • Publication number: 20210359301
    Abstract: A nonaqueous electrolyte secondary battery includes: a positive electrode containing a positive electrode active material; a negative electrode containing a negative electrode active material; and a nonaqueous electrolyte. The positive electrode active material includes a complex oxide containing lithium and metal M excluding lithium, where a plurality of primary particles of the complex oxide are aggregated to form a secondary particle. The metal M includes at least nickel and aluminum and/or manganese, where an atomic ratio of nickel to the metal M (Ni/M) is 0.8 or more and less than 1.0. The primary particles have an average particle size of 0.20 ?m or more and 0.35 ?m or less.
    Type: Application
    Filed: September 19, 2019
    Publication date: November 18, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Tomoki Tsuji, Takeshi Ogasawara, Masanobu Takeuchi, Noriko Fukamichi
  • Patent number: 11176096
    Abstract: Methods and systems for managing data redundancy include registering certified commands, input files, output files, and arguments in an execution history list after execution of said certified commands. An existing output file is provided in response to execution of a first certified command that matches an entry in the execution history list. A file is deleted if the file is reproducible from another file using a second certified command. The deleted file is registered in a reproducible file list. The deleted file is reproduced upon request using the second certified command.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: November 16, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Megumi Ito, Yasushi Negishi, Takeshi Ogasawara
  • Publication number: 20210288305
    Abstract: An object of the invention is to provide a positive electrode active material for nonaqueous electrolyte secondary batteries that prevents low capacity recovery after high-temperature storage. A nonaqueous electrolyte secondary battery according to the present invention includes secondary particles of a lithium transition metal oxide resulting from the aggregation of primary particles of the oxide, secondary particles of a rare earth compound resulting from the aggregation of primary particles of the compound, and a magnesium compound. The secondary particles of the rare earth compound are adhering to depressions formed between adjacent primary particles of the lithium transition metal oxide on the surface of the secondary particles of the lithium transition metal oxide and also to each of the primary particles forming the depressions. The magnesium compound is adhering to the surface of the secondary particles of the lithium transition metal oxide.
    Type: Application
    Filed: July 26, 2017
    Publication date: September 16, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Daizo Jito, Takeshi Ogasawara
  • Patent number: 11121363
    Abstract: The present invention is directed to a positive electrode active material for non-aqueous electrolyte secondary batteries that can reduce direct-current resistance while it contains a nickel-containing lithium transition metal oxide with a high Ni content. The positive electrode active material contains lithium borate and a nickel-containing lithium transition metal oxide (Ni?80 mol %) having a layered structure. The nickel-containing lithium transition metal oxide is composed of secondary particles formed by aggregation of primary particles. Lithium borate is attached to the surfaces of the primary particles. The proportion b of lithium borate with respect to the total molar amount of metal elements other than lithium in the nickel-containing lithium transition metal oxide is in the range of 0 mol %<b?0.5 mol % on a boron element basis. The porosity h of the secondary particles is in the range of 2%<h<6%.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: September 14, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yoshinori Aoki, Motoharu Saitou, Takeshi Ogasawara
  • Patent number: 11094924
    Abstract: An object of the present invention is to provide a nonaqueous electrolyte secondary battery that can attain a smaller increase in direct current resistance after charge discharge cycles. An aspect of the invention resides in a nonaqueous electrolyte secondary battery wherein a positive electrode active material includes a secondary particle formed by aggregation of primary particles of a lithium transition metal oxide, and a secondary particle formed by aggregation of primary particles of a rare earth compound. On a surface of the secondary particle of the lithium transition metal oxide, the secondary particle of the rare earth compound is attached to a recess formed between adjacent primary particles of the lithium transition metal oxide in such a manner that the secondary particle of the rare earth compound is attached to each of the primary particles forming the recess. The lithium transition metal oxide includes magnesium dissolved therein.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 17, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO, LTD.
    Inventors: Daizo Jito, Akihiro Kawakita, Takeshi Ogasawara
  • Patent number: 11086680
    Abstract: A method, system and computer program product for optimally allocating objects in a virtual machine environment implemented on a NUMA computer system. The method includes: obtaining a node identifier; storing the node identifier in a thread; obtaining an object identifier of a lock-target object from a lock thread; writing a lock node identifier into the lock-target object; traversing an object reference graph where the object reference graph contains an object as a graph node, a reference from the first object to a second object as an edge, and a stack allocated to a thread as the root node; determining whether a move-target object contains the lock node identifier; moving the move-target object to a subarea allocated to a lock node if it contains the lock node identifier, and moving the move-target object to the destination of the current traversal target object if the lock node identifier is not found.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: August 10, 2021
    Assignee: International Business Machines Corporation
    Inventor: Takeshi Ogasawara
  • Publication number: 20210226211
    Abstract: A positive electrode active material for non-aqueous electrolyte secondary batteries comprises a Co-containing lithium transition metal oxide containing Ni, Mn, and an arbitrary element and having a layered structure, wherein the content ratio of Ni in the lithium transition metal oxide is 75 to 95 mol %, the content ratio of Mn in the lithium transition metal oxide is equal to or greater than the content ratio of Co in the lithium transition metal oxide, the content ratio of Co in the lithium transition metal oxide is 0 to 2 mol %, the content ratio of a metal element other than Li in an Li layer in the layered structure is 1 to 2.5 mol %, and, in the lithium transition metal oxide, the half width n of a diffraction peak for (208) plane of an X-ray diffraction pattern as measured by X-ray diffraction is as follows: 0.30°23 n?0.50°.
    Type: Application
    Filed: February 27, 2019
    Publication date: July 22, 2021
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Yoshinori Aoki, Toshinobu Kanai, Takeshi Ogasawara
  • Patent number: 11018691
    Abstract: Methods and systems for storing data include compressing data inflated from a first compression format into a second format using a processor and verifying contents of the data concurrently with compressing the data. Compression is aborted responsive to a failure of the content verification, but an output of the compression is stored to a tape drive until the compression is aborted. The tape drive is rolled back to a file start position after the compression is aborted and compression of any remaining uncompressed data is skipped after the compression is aborted. The data is stored to the tape drive after rolling the tape drive back.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: May 25, 2021
    Assignee: International Business Machines Corporation
    Inventor: Takeshi Ogasawara
  • Patent number: 11005099
    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, and a nonaqueous electrolyte. The positive electrode active material includes lithium nickel complex oxide, and the lithium nickel oxide has a layered rock-salt structure and is represented by a composition formula of LixNiyMzO2 (where M is at least one metal element selected from the group consisting of Co, Al, Mg, Ca, Cr, Zr, Mo, Si, Ti, and Fe, and x, y, and z satisfy 0.95?x?1.05, 0.8?y?1, 0?z?0.2, and y+z=1). A half width n of a (104) diffraction peak in an X-ray diffraction pattern is 0.13° or less, and the content of the positive electrode active material with a particle size of 3.41 ?m or less is 2 volume % or less based on a total amount of the positive electrode active material contained in the positive electrode.
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: May 11, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Motoharu Saitou, Yoshinori Aoki, Takeshi Ogasawara