Patents by Inventor Tomokazu Morita

Tomokazu Morita 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: 9876220
    Abstract: An electrode has a current collector and an electrode mixture containing a binder and an active material particle selected from at least one of a carbonaceous material, a metal particle and a metal oxide particle formed on the current collector. When cutting strength of an interface between the current collector and the electrode mixture is represented by “a” and cutting strength in a horizontal direction within the electrode mixture is represented by “b”, the “a” and “b” satisfy a relation of a/b>1.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: January 23, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuyuki Hotta, Takashi Kuboki, Tomokazu Morita
  • Publication number: 20180006335
    Abstract: A storage battery controlling device according to an embodiment of the present invention includes: a battery characteristic estimator configured to calculate an internal resistance of a secondary battery and a function indicating relationship between an open circuit voltage of the secondary battery and a state of charge or an amount of a charge charged of the secondary battery therein, on the basis of data of a temperature, a voltage and a current of the secondary battery which are measured in charging or discharging the secondary battery; and an input/output performance value calculator configured to calculate an inputtable/outputtable power amount of the secondary battery on the basis of the internal resistance and the function calculated by the battery characteristic estimator.
    Type: Application
    Filed: August 31, 2017
    Publication date: January 4, 2018
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yumi FUJITA, Tomokazu MORITA, Ena ISHll, Nobukatsu SUGIYAMA
  • Patent number: 9859553
    Abstract: A negative electrode active material for a nonaqueous electrolyte secondary battery of an embodiment includes a carbonaceous material, a silicon oxide phase in the carbonaceous material, and a silicon phase in the silicon oxide phase. The negative electrode active material has a crack in the carbonaceous material, and the longest side of the crack has a length equal to or greater than ? of the diameter of the negative electrode active material.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: January 2, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tomokazu Morita, Takashi Kuboki, Takayuki Fukasawa, Yasuyuki Hotta, Yasuhiro Goto, Toshiro Hiraoka
  • Patent number: 9859552
    Abstract: An electrode material for nonaqueous electrolyte secondary battery of an embodiment includes a silicon nanoparticle, and a coating layer coating the silicon nanoparticle. The coating layer includes an amorphous silicon oxide and a silicon carbide phase. At least a part of the silicon carbide phase exists on a surface of the silicon nanoparticle.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: January 2, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Fukasawa, Kenji Essaki, Tomokazu Morita, Takashi Kuboki, Mitsuhiro Oki, Yasuhiro Goto
  • Patent number: 9831492
    Abstract: A nonaqueous electrolyte secondary battery of an embodiment includes an exterior member, a cathode including a cathode active material layer housed in the exterior member, an anode including an anode active material layer housed in the exterior member and spatially separated from the cathode by a separator, and a nonaqueous electrolyte filled in the exterior member. The cathode active material layer contains lithium-copper oxide and copper oxide. A peak intensity ratio d(002)/d(010) between a plane index d(010) derived from the lithium-copper oxide and a plane index d(002) derived from the copper oxide is not lower than 0.1 and not higher than 0.5 at an X-ray diffraction peak.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: November 28, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinsuke Matsuno, Norikazu Osada, Keiko Okamoto, Tomokazu Morita, Takashi Kuboki
  • Patent number: 9786902
    Abstract: An electrode for battery has an electrode mixture containing a binder and an active material particle selected from at least one of a carbonaceous material, a metal particle and a metal oxide particle formed on a current collector. When cutting strength of an interface between the current collector and the electrode mixture is represented by “a” and cutting strength in a horizontal direction within the electrode mixture is represented by “b”, the “a” and “b” satisfy a relation of a/b<1.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: October 10, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuyuki Hotta, Takashi Kuboki, Tomokazu Morita
  • Publication number: 20170271680
    Abstract: An electrode material for a nonaqueous electrolyte battery of the present embodiment includes a composite particle, the composite particle contains a silicon dioxide particle having an average primary particle size of D1, a silicon particle having an average primary particle size of D2, and a carbon material. D1 is 5 nm or more and 80 nm or less. The ratio D2/D1 of D2 to D1 is 0.3 or more and 8 or less.
    Type: Application
    Filed: September 8, 2016
    Publication date: September 21, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Takashi KUBOKI, Shinsuke MATSUNO, Tomokazu MORITA
  • Publication number: 20170263984
    Abstract: A storage battery evaluation device according to an embodiment of the present invention includes a processor configured to execute a program to provide at least a battery characteristic estimator and a deterioration progress calculator. The battery characteristic estimator estimates a battery characteristic including at least one of battery capacity, internal resistance, and open-circuit voltage of a secondary battery on the basis of data of voltage and current of the secondary battery, the data being measured at the time of charging or discharging of the secondary battery. The deterioration progress calculator calculates a deterioration progress representing the progress of deterioration of the secondary battery, on the basis of a value related to a performance index of the secondary battery, the value being calculated on the basis of the battery characteristic.
    Type: Application
    Filed: September 14, 2016
    Publication date: September 14, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yumi FUJITA, Tomokazu MORITA, Ena ISHll, Nobukatsu SUGIYAMA
  • Publication number: 20170229883
    Abstract: According to one embodiment, a battery includes: a first wire; a second wire; a third wire; a first resistor; a first switch; a second switch; a second resistor; a voltage measurer; and a controller that calculates a second resistance value of the third wire using a first voltage of a first battery when the first switch is turned on and the second switch is turned off, a second voltage of a second battery when the first switch is turned on and the second switch is turned off, a third voltage of the second battery when the first switch is turned off and the second switch is turned off, and a first resistance value of the first resistor.
    Type: Application
    Filed: September 8, 2016
    Publication date: August 10, 2017
    Inventors: Nobukatsu SUGIYAMA, Ena ISHll, Tomokazu MORITA
  • Publication number: 20170092942
    Abstract: The active material for a nonaqueous electrolyte secondary battery of the present embodiment includes a core particle and a carbon layer. The core particle is formed of silicon particles having a twinned crystal in part of a surface. The carbon layer coats the core particle.
    Type: Application
    Filed: March 17, 2014
    Publication date: March 30, 2017
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Tomokazu MORITA, Takashi KUBOKI, Yasuhiro GOTO
  • Publication number: 20170077498
    Abstract: An electrode for a nonaqueous electrolyte battery of the embodiment includes a current collector; and an active material layer which includes an active material and is formed on the current collector. The active material layer includes at least one of a silicon particle and a silicon oxide particle. The active material layer has a plurality of cracks extending in a thickness direction of the active material layer.
    Type: Application
    Filed: September 8, 2016
    Publication date: March 16, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Tomokazu MORITA, Takashi KUBOKI
  • Publication number: 20170069938
    Abstract: According to an embodiment, a charging condition control apparatus includes a measurement unit, an estimation unit, a calculation unit and a control unit. The measurement unit measures a present battery capacity of a secondary battery. The estimation unit estimates a present end-of-charge potential of an anode of the secondary battery based on the present battery capacity and an open circuit potential curve of the anode. The calculation unit calculates a differential potential between the present end-of-charge potential and an initial end-of-charge potential of the anode. The control unit controls a charging condition of the secondary battery according to the differential potential.
    Type: Application
    Filed: September 9, 2016
    Publication date: March 9, 2017
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tomokazu MORITA, Takashi KUBOKI, Shinsuke MATSUNO
  • Publication number: 20160380313
    Abstract: According to an embodiment, a battery pack includes an initial state estimation unit, a temperature estimation unit, and a determination unit. The internal state estimation unit estimates an internal state of a secondary battery based on measurement data. The temperature estimation unit estimates the temperature of the secondary battery based on the measurement data and the estimation parameter. The determination unit compares an absolute value of a temperature difference between a measured temperature of the secondary battery contained in the measurement data and the estimated temperature with one or more temperature threshold levels, and determines a temperature state of the secondary battery in accordance with a comparison result.
    Type: Application
    Filed: September 9, 2016
    Publication date: December 29, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Tomokazu MORITA, Mitsunobu YOSHIDA, Ena ISHll, Nobukatsu SUGIYAMA
  • Publication number: 20160372744
    Abstract: An active material of an embodiment for a nonaqueous electrolyte battery includes a complex. The complex includes a covering material including an M-O—C mixed body; and particles including at least one element of M. The particles are included in the covering material. The M includes at least one element selected from the group consisting of; Si, Sn, Al, and Ti. The particles including the at least one element of M include the at least one element of M or an alloy including the at least one element of M. The M-O—C mixed body includes at least three elements of M, O, and C. The M-O—C mixed body includes a point at which the following conditional expressions: 0.6?M/O?5 (molar ratio) and 0.002?M/C?0.1 (molar ratio) are simultaneously satisfied. The M-O—C mixed body includes the at least three elements of M, O, and C in a region excluding the particles including the at least one element of M when elementary composition analysis of the complex is performed by TEM-EDX with a beam diameter of 1 nm.
    Type: Application
    Filed: September 2, 2016
    Publication date: December 22, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kenji ESSAKI, Tomokazu MORITA, Takayuki FUKASAWA, Takashi KUBOKI
  • Publication number: 20160372753
    Abstract: A negative electrode active material of an embodiment for a nonaqueous electrolyte battery includes silicon or silicon oxide including silicon inside, a carbonaceous substance containing the silicon or the silicon oxide including silicon inside, and a phase including a silicate compound and a conductive assistant, the phase being interposed between the silicon or the silicon oxide including silicon inside and the carbonaceous substance. The silicate compound is a complexed oxide including an oxide including at least one element selected from the group consisting of; an alkaline earth element, a transition metal element, and a rare-earth element and a silicon oxide.
    Type: Application
    Filed: September 2, 2016
    Publication date: December 22, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takayuki FUKASAWA, Kenji ESSAKI, Tomokazu MORITA, Takashi KUBOKI
  • Publication number: 20160285082
    Abstract: In one embodiment, an electrode for a nonaqueous electrolyte secondary battery has an electrode mixture layer comprising an active material, a conductive agent, and a binding agent to bind the active material and the conductive agent, and a collector on which the electrode mixture layer is laminated. The active material comprises a composite body comprising at least a carbonaceous material, and a metal dispersed in the carbonaceous material or an oxide of the metal. And the binding agent is a polyvinyl alcohol resin of a saponification degree of 87-99.9 mole %.
    Type: Application
    Filed: March 21, 2016
    Publication date: September 29, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yasuyuki Hotta, Tomokazu Morita, Takashi Kuboki
  • Publication number: 20160195590
    Abstract: According to one embodiment, there is provided a battery apparatus including a battery management device configured to receive voltages and temperatures of cells, and detection data of a current sensor, and a measuring computer configured to calculate a characteristic value of each cell or cell module, based on the detection data acquired from the battery management device at first time intervals, and to send, the acquired detection data or the calculated characteristic value to a control device at second time intervals which are longer than the first time intervals.
    Type: Application
    Filed: March 11, 2016
    Publication date: July 7, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinichiro KOSUGI, Masahiro SEKINO, Masayuki HOSHINO, Hiroaki SAKURAI, Tomokazu MORITA, Takenori KOBAYASHI, Tomohiro TOYOSAKI, Masatake SAKUMA, Takahiro YAMAMOTO
  • Publication number: 20160164076
    Abstract: An active material for a nonaqueous electrolyte battery according to the embodiment is a composite including at least: a carbonaceous substance; and silicon-containing particles dispersed in the carbonaceous substance, the silicon-containing particles including at least one of silicon, a silicon alloy and a silicon oxide, wherein in an argon ion laser Raman spectrum, the half-width (?G) of a peak having a maximum intensity I1 in the range of 1575 cm?1 or more and 1625 cm?1 or less is 100 cm?1 or more and 150 cm?1 or less, and the intensity ratio of a peak having a maximum intensity I2 in the range of 500 cm?1 or more and 550 cm?1 or less to the peak having the maximum intensity I1 in the range of 1575 cm?1 or more and 1625 cm?1 or less (I2/I1) is 0.25 or more and 0.50 or less.
    Type: Application
    Filed: December 2, 2015
    Publication date: June 9, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Kenji ESSAKI, Takayuki FUKASAWA, Miho MURAMATSU, Tomokazu MORITA, Takashi KUBOKl, Yumiko KITA
  • Patent number: 9318737
    Abstract: There is provided a negative electrode material for non-aqueous electrolyte secondary batteries, the negative electrode material being a silicon oxide represented by the composition formula, SiOx, containing silicon and silicon oxide, in which x satisfies the relation of 0.1?x?0.8; the silicon oxide contains crystalline silicon; among the particles of crystalline silicon having a diameter of 1 nm or greater, the proportion by number of particles having a diameter of 100 nm or less is 90% or greater; and the BET specific surface area of the silicon oxide is larger than 100 m2/g.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: April 19, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenji Essaki, Takayuki Fukasawa, Tomokazu Morita, Noikazu Osada, Yasuyuki Hotta, Takashi Kuboki, Toshiro Hiraoka
  • Publication number: 20160087267
    Abstract: An electrode active material for a nonaqueous electrolyte secondary battery includes a composite of a lithium-containing silicon oxide and a silicon-containing compound which contains at least one of silicon and silicon oxide, wherein the lithium-containing silicon oxide contains Li2Si2O5 as a main component.
    Type: Application
    Filed: September 15, 2015
    Publication date: March 24, 2016
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Sara YOSHIO, Kenji ESSAKI, Takayuki FUKASAWA, Tomokazu MORITA, Takashi KUBOKl