Patents by Inventor Tomokazu Masuda

Tomokazu Masuda 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: 20220292441
    Abstract: [PROBLEM] To provide a data distribution platform for data about storage batteries. [SOLVING MEANS] An information system for storage batteries according to an embodiment accepts registration of information about a manufactured storage battery from a first terminal and registration of a use history of a storage battery from a second terminal, the use history including battery state information acquired at each of points in time during a period of use of the storage battery, and accumulates the information about the storage battery and the use history. The information system uses the registered information about the storage battery and/or the registered use history to create an internal state estimation result with a predetermined evaluation technique, and accumulates the internal state estimation result as platform-based evaluation information in association with the registered information and/or the registered use history.
    Type: Application
    Filed: August 10, 2021
    Publication date: September 15, 2022
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA DIGITAL SOLUTIONS CORPORATION
    Inventors: Tomokazu MORITA, Yumi FUJITA, Nobukatsu SUGIYAMA, Masahiro SHOJI, Mari TAKEDA, Tamotsu MASUDA
  • Patent number: 11121558
    Abstract: A charging device includes: a switch configured to perform connection and disconnection between a positive bus and a negative bus of a charging line; a low-voltage power storage device having a normal voltage lower than a normal voltage of a power storage device; and a converter configured to exchange electric power between a power line and the low-voltage power storage device with a change of a voltage. At the time of system activation, a control device controls the switch so that the positive bus and the negative bus of the charging line are connected to each other, and after that, the control device performs a welding diagnosis to determine whether or not welding occurs in a charging relay, based on a voltage of a capacitor, while the control device controls the converter so that the capacitor is charged with electric power from the low-voltage power storage device.
    Type: Grant
    Filed: October 8, 2019
    Date of Patent: September 14, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Masuda
  • Publication number: 20210210962
    Abstract: An on-board charging management apparatus includes a vehicle-side earth line connected with an external-side earth line of an external power unit; a vehicle-side signal line connected with an external-side signal line of the external power unit; and a detection signal line configured to connect the vehicle-side signal line and the vehicle-side earth line. Presence or absence of a disconnection of the external-side earth line and the vehicle-side earth line is determined based on an electric current value or a voltage value of the detection signal line, when the external power unit is in a connected state. As a consequence, the on-board charging management apparatus can detect a disconnection of the earth line at the time of charging an on-board electric storage device.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 8, 2021
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomokazu Masuda, Kenya Segawa
  • Patent number: 11025074
    Abstract: An on-board charging management apparatus includes a vehicle-side earth line connected with an external-side earth line of an external power unit; a vehicle-side signal line connected with an external-side signal line of the external power unit; and a detection signal line configured to connect the vehicle-side signal line and the vehicle-side earth line. Presence or absence of a disconnection of the external-side earth line and the vehicle-side earth line is determined based on an electric current value or a voltage value of the detection signal line, when the external power unit is in a connected state. As a consequence, the on-board charging management apparatus can detect a disconnection of the earth line at the time of charging an on-board electric storage device.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: June 1, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomokazu Masuda, Kenya Segawa
  • Patent number: 10926642
    Abstract: An electric vehicle includes an electrical storage device, a charging device that charges the electrical storage device when connected to the external power supply device, a ground fault detection device including a ground fault detection circuit and configured to detect a ground fault while the electrical storage device is being charged, and a controller that carries out communication with the external power supply device and carries out communication with the ground fault detection device. The controller acquires a common-mode noise margin of the external power supply device and transmits a ground fault detection time based on the common-mode noise margin to the ground fault detection device. The ground fault detection device detects a ground fault when the ground fault detection time has elapsed from when the ground fault detection circuit is set to a state where a ground fault is detectable.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: February 23, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Masuda
  • Patent number: 10894478
    Abstract: A vehicle includes: a power receiving device configured to receive electric power from a power transmitting unit of a power transmitting device disposed outside the vehicle; a power storage device that stores the electric power received by the power receiving device; an operation device that receives a user's operation, the user's operation including a starting operation performed by a user to start a vehicle system, and a stopping operation performed fey the user to stop the vehicle system; and an electronic control unit configured to i) perform control of executing timer charging of the power storage device based on a time schedule, and ii) perform a process of performing, charging of the power storage device regardless of the timer charging having been set when the timer charging is set and the operation device has received the user's operation before a charging start time based on the time schedule arrives.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: January 19, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Masuda
  • Publication number: 20200144840
    Abstract: A charging device includes: a switch configured to perform connection and disconnection between a positive bus and a negative bus of a charging line; a low-voltage power storage device having a normal voltage lower than a normal voltage of a power storage device; and a converter configured to exchange electric power between a power line and the low-voltage power storage device with a change of a voltage. At the time of system activation, a control device controls the switch so that the positive bus and the negative bus of the charging line are connected to each other, and after that, the control device performs a welding diagnosis to determine whether or not welding occurs in a charging relay, based on a voltage of a capacitor, while the control device controls the converter so that the capacitor is charged with electric power from the low-voltage power storage device.
    Type: Application
    Filed: October 8, 2019
    Publication date: May 7, 2020
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Masuda
  • Patent number: 10385430
    Abstract: The present invention provides a steel material, such as a high-strength spring, that has excellent fatigue properties, and, more specifically, a steel material, such as the high-strength spring, that can improve the fatigue properties in a high-strength region more easily, without increasing an alloy cost. The steel material includes, in percent by mass, C: 0.5 to 1.0%, Si: 1.5 to 2.50%, Mn: 0.5 to 1.50%, P: more than 0% to 0.020% or less, S: more than 0% to 0.020% or less, Cr: more than 0% to 0.2% or less, Al: more than 0% to 0.010% or less, N: more than 0% to 0.0070% or less, and O: more than 0% to 0.0040% or less, and the balance consisting of iron and inevitable impurities, wherein Cr and Si contents satisfy a formula of Cr×Si?0.20, a ratio of tempered martensite in a steel microstructure is 80% or more by area, and a number density of particles of Cr-containing carbide or carbonitride having a circle-equivalent diameter of 50 nm or more in the steel microstructure is 0.10 particles/?m2 or less.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: August 20, 2019
    Assignee: KOBE STEEL, LTD.
    Inventors: Hiroshi Oura, Tomokazu Masuda, Nao Yoshihara, Takayuki Naito, Akito Suzuki
  • Publication number: 20190225088
    Abstract: An electric vehicle includes an electrical storage device, a charging device that charges the electrical storage device when connected to the external power supply device, a ground fault detection device including a ground fault detection circuit and configured to detect a ground fault while the electrical storage device is being charged, and a controller that carries out communication with the external power supply device and carries out communication with the ground fault detection device. The controller acquires a common-mode noise margin of the external power supply device and transmits a ground fault detection time based on the common-mode noise margin to the ground fault detection device. The ground fault detection device detects a ground fault when the ground fault detection time has elapsed from when the ground fault detection circuit is set to a state where a ground fault is detectable.
    Type: Application
    Filed: January 23, 2019
    Publication date: July 25, 2019
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Masuda
  • Patent number: 10358047
    Abstract: An electric power storage system for a vehicle includes a temperature sensor configured to detect a temperature of a battery, a battery heater, a charger connectable with an external power supply and configured to deliver external power to the battery and the battery heater, and a controller. In the system, a first electric power is supplied to the battery heater when the state of charge of the battery is larger than a predetermined value and the temperature of the battery is equal to or lower than the predetermined temperature, and a second electric power is supplied to the battery heater when the state of charge of the battery is equal to or smaller than the predetermined value and the temperature of the battery is equal to or lower than the predetermined temperature. The first electric power is smaller than the second electric power.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: July 23, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takashi Murata, Tomokazu Masuda
  • Patent number: 10328809
    Abstract: An inlet is configured to connect with a connector of a charging cable. An ECU is configured to switch between (i) a charging permitted state in which external charging is permitted and (ii) a charging non-permitted state in which external charging is not permitted. When the connector is in connection to the inlet, the ECU selects the charging permitted state in which external charging is permitted, even if a connector connection signal indicative of a state of connection between the connector and the inlet indicates a partially-connected state in which the connection between the connector and the inlet is not latched.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: June 25, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Masuda
  • Patent number: 10308126
    Abstract: In a case where a connector of a power supply facility is connected to an inlet, an ECU is configured to control a potential of a pilot signal so as to request power supply to the power supply facility and to permit execution of external charging. Further, in a case where the ECU detects a feeding voltage from the power supply facility without requesting the power supply to the power supply facility, when it is detected that the feeding voltage is not output from the power supply facility in a state where the connector is connected to the inlet, the ECU permits the external charging.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: June 4, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Masuda
  • Publication number: 20190148957
    Abstract: An on-board charging management apparatus includes a vehicle-side earth line connected with an external-side earth line of an external power unit; a vehicle-side signal line connected with an external-side signal line of the external power unit; and a detection signal line configured to connect the vehicle-side signal line and the vehicle-side earth line. Presence or absence of a disconnection of the external-side earth line and the vehicle-side earth line is determined based on an electric current value or a voltage value of the detection signal line, when the external power unit is in a connected state. As a consequence, the on-board charging management apparatus can detect a disconnection of the earth line at the time of charging an on-board electric storage device.
    Type: Application
    Filed: November 14, 2018
    Publication date: May 16, 2019
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomokazu Masuda, Kenya Segawa
  • Publication number: 20180236889
    Abstract: A vehicle includes: a power receiving device configured to receive electric power from a power transmitting unit of a power transmitting device disposed outside the vehicle; a power storage device that stores the electric power received by the power receiving device; an operation device that receives a user's operation, the user's operation including a starting operation performed by a user to start a vehicle system, and a stopping operation performed fey the user to stop the vehicle system; and an electronic control unit configured to i) perform control of executing timer charging of the power storage device based on a time schedule, and ii) perform a process of performing, charging of the power storage device regardless of the timer charging having been set when the timer charging is set and the operation device has received the user's operation before a charging start time based on the time schedule arrives.
    Type: Application
    Filed: February 21, 2018
    Publication date: August 23, 2018
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tomokazu Masuda
  • Publication number: 20180216214
    Abstract: The present invention provides a steel material, such as a high-strength spring, that has excellent fatigue properties, and, more specifically, a steel material, such as the high-strength spring, that can improve the fatigue properties in a high-strength region more easily, without increasing an alloy cost. The steel material includes, in percent by mass, C: 0.5 to 1.0%, Si: 1.5 to 2.50%, Mn: 0.5 to 1.50%, P: more than 0% to 0.020% or less, S: more than 0% to 0.020% or less, Cr: more than 0% to 0.2% or less, Al: more than 0% to 0.010% or less, N: more than 0% to 0.0070% or less, and O: more than 0% to 0.0040% or less, and the balance consisting of iron and inevitable impurities, wherein Cr and Si contents satisfy a formula of Cr×Si?0.20, a ratio of tempered martensite in a steel microstructure is 80% or more by area, and a number density of particles of Cr-containing carbide or carbonitride having a circle-equivalent diameter of 50 nm or more in the steel microstructure is 0.10 particles/?m2 or less.
    Type: Application
    Filed: March 27, 2015
    Publication date: August 2, 2018
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Hiroshi OURA, Tomokazu MASUDA, Nao YOSHIHARA, Takayuki NAITO, Akito SUZUKI
  • Patent number: 10000137
    Abstract: A sub DC/DC converter converts an output voltage of a charger into a level of an output of an auxiliary battery, and outputs the output voltage to a power supply line connected to a PLG-ECU and the auxiliary battery. A control unit interrupts a current path from the power supply line to the auxiliary battery when a voltage of the sub auxiliary battery is equal to or lower than a prescribed value.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: June 19, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomokazu Masuda, Tomohiro Inoue
  • Patent number: 9937817
    Abstract: A vehicle includes an electrical storage device, an auxiliary load, a charger configured to charge the electrical storage device with power supplied from a power supply outside the vehicle, and an electronic control unit. The electronic control unit is configured to create an actuation schedule of the auxiliary load during charging of the electrical storage device, before initiation of the charging. The electronic control unit is configured to learn charging power of the electrical storage device for each actuation pattern of the auxiliary load during the charging. The electronic control unit is configured to estimate a required time period for the charging based on a learned value of the charging power, an execution time period of each of the actuation patterns, and a total charging power amount of the electrical storage device. The electronic control unit sets initiation time of the charging in accordance with the estimated required time period.
    Type: Grant
    Filed: May 23, 2016
    Date of Patent: April 10, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yamato Niwa, Tomokazu Masuda, Yoshihiro Nomura, Kiyohito Machida, Yusuke Kuruma
  • Publication number: 20180087124
    Abstract: A heat-treated steel wire having excellent bendability is provided. The heat-treated steel wire includes, in % by mass: C: 0.5 to 0.8%, Si: 1.5 to 2.5%, Mn: 0.5 to 1.5%, P: more than 0% to 0.02%, S: more than 0% to 0.02%, Cr: 0.3 to less than 0.7%, V: 0.05 to 0.5%, Al: more than 0% to 0.01%, N: more than 0% to 0.007%, and O: more than 0% to 0.004%, and iron. When electrolytic extraction residue analysis is performed using a 1.0 ?m filter and a 0.4 ?m filter, a ratio of [amount of Cr-based carbides in a 1.0 ?m filter residue/amount of an electrolyte] is 1.0% or more and 2.80% or less. When residue analysis of the filtrate obtained by the 1.0 ?m filter is performed, a ratio of [amount of Cr based carbides in a 0.4 ?m filter residue/amount of an electrolyte] is 0.10% or less.
    Type: Application
    Filed: March 22, 2016
    Publication date: March 29, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hiroshi OURA, Tomokazu MASUDA
  • Publication number: 20180087125
    Abstract: To provide a high-carbon steel wire rod with excellent wire drawability. The high-carbon steel wire rod of the present invention includes predetermined components and also includes pearlite and proeutectoid cementite, and an area ratio of pearlite is 90% or more relative to the entire structure, a maximum length of proeutectoid cementite is 15 ?m or less, and a concentration difference between an average of the Si concentration inside proeutectoid cementite and a maximum value of the Si concentration inside ferrite that forms a lamellar structure of pearlite is 0.50 to 3%.
    Type: Application
    Filed: March 29, 2016
    Publication date: March 29, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Tomonobu ISHIDA, Tomokazu MASUDA
  • Publication number: 20180073093
    Abstract: To provide a heat-treated steel wire having excellent fatigue-resistance characteristics. The heat-treated steel of the present invention has a predetermined chemical composition, with the balance being iron and inevitable impurities, wherein the heat-treated steel wire includes, in a tempered martensite structure at a depth of 0.3 mm from a surface layer: Cr based carbides having a circle equivalent diameter of 0.1 ?m or more and less than 0.3 ?m in 0.20 particles/?m2 or less, Cr based carbides having a circle equivalent diameter of 0.3 ?m or more and less than 0.7 ?m in 0.002 particles/?m2 or less, and Cr based carbides having a circle equivalent diameter of 0.7 ?m or more in 0.0010 particles/?m2 or less, and wherein the amount of residual austenite exceeds 5% and 15% or less in terms of a volume ratio.
    Type: Application
    Filed: March 22, 2016
    Publication date: March 15, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Hiroshi OURA, Tomokazu MASUDA