Patents by Inventor Wataru Okada

Wataru Okada 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: 11848463
    Abstract: Each of a plurality of power storage cells includes an top surface provided with an electrode terminal, a bottom surface opposite to the top surface, and a side surface contiguous to the top surface and the bottom surface. A case includes a main body provided with an opening on the side surface side of the plurality of power storage cells, and a cover provided over the opening. The case has a first inner side surface and a second inner side surface each facing the side surfaces of the plurality of power storage cells. A power storage device includes biasing means for biasing the plurality of power storage cells toward the second inner side surface of the case, the biasing means being provided between the first inner side surface of the case and the plurality of power storage cells.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: December 19, 2023
    Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Taijyu Morishita, Wataru Okada
  • Publication number: 20230387912
    Abstract: A driving circuit that drives a switching element, the driving circuit includes: a controller that includes a first terminal connected to a gate terminal of the switching element and a second terminal connected to a source terminal of the switching element, and outputs a control signal from the first terminal to the gate terminal; a first capacitor and a first resistor connected in parallel; and a second capacitor and a second resistor connected in parallel, in which the first capacitor and the first resistor are connected in series to a first connecting wire for connecting the gate terminal and the first terminal on the gate terminal side of the first connecting wire, and in which the second capacitor and the second resistor are connected in series to the first connecting wire on the first terminal side of the first connecting wire.
    Type: Application
    Filed: September 7, 2021
    Publication date: November 30, 2023
    Inventors: Noriyuki NOSAKA, Hironori TAUCHI, Takuro HASHIMOTO, Wataru OKADA, Mamoru SUEKI, Satoshi IWAI
  • Publication number: 20230327664
    Abstract: In a switching circuit apparatus, first and second capacitors apply power supply voltages to first and second drive circuits. First and second diodes are connected such that currents flow from a DC voltage source to the first and second capacitors. A resistor and a Zener diode are connected in series between a terminal and a node, such that a reverse bias voltage is applied from the terminal to the Zener diode via the resistor. A third diode is connected such that a current flows to the first capacitor from a node (N2) between the resistor and the Zener diode.
    Type: Application
    Filed: August 31, 2021
    Publication date: October 12, 2023
    Inventors: Noriyuki NOSAKA, Junya MISHIMA, Mamoru SUEKI, Wataru OKADA
  • Patent number: 11777169
    Abstract: A method of manufacturing a power storage module includes: stacking a plurality of power storage cells along a first direction; compressing the plurality of power storage cells along the first direction; aligning the plurality of power storage cells in a second direction orthogonal to the first direction after relieving pressing force of the compressing; compressing the plurality of power storage cells along the first direction after aligning the plurality of power storage cells in the second direction; disposing a restraint portion on both sides in the first direction with respect to the plurality of power storage cells under application of pressing force of the compressing; and restraining the plurality of power storage cells by the restraint portion along the first direction by relieving, after disposing the restraint portion, the pressing force of the compressing.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: October 3, 2023
    Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Wataru Okada, Seiichi Sakuramoto
  • Patent number: 11616261
    Abstract: A power supply device includes battery cells each having a rectangular external shape, a separator disposed between the battery cells, a pair of end plates that are disposed on respective ends of a battery assembly in which the separator and the battery cells are stacked, and a bind bar that binds the pair of end plates. The separator has insulating rib parts that protrude from both surfaces of the separator, and the insulating rib parts of the separator stacked on each surface of the battery cell are stacked on each other on a bottom surface of the battery cell. The insulating rib parts are stacked on each other on the bottom surface of the battery cell by inserting an insertion rib provided in one of the stacked insulating rib parts into an insertion groove provided in the other of the stacked insulating rib parts.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: March 28, 2023
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Wataru Okada, Kosho Abe, Yusuke Fujii, Takeshi Nagane, Sho Ojima
  • Patent number: 11606021
    Abstract: A power converter apparatus includes a switching circuit generating an AC voltage by switching a DC voltage at a predetermined switching frequency, and a filter circuit converting the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit includes first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than multiple times the switching frequency by insertion of the inductor, thereby reducing the switching noise flowing to the load.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: March 14, 2023
    Assignee: OMRON CORPORATION
    Inventors: Noriyuki Nosaka, Takeo Nishikawa, Wataru Okada, Satoshi Iwai, Takanori Ishii, Gun Eto
  • Publication number: 20230043841
    Abstract: A semiconductor circuit includes: a first inductor part configured to connect in series with a source electrode of a first semiconductor element; and a second inductor part configured to connect in series with a source electrode in a second semiconductor element that is configured to connect in parallel with the first semiconductor element; the first inductor part and the second inductor part are arranged to generate an induced electromotive force in the first inductor part and the second inductor part by way of a magnetic interaction so that the currents flowing in the first inductor part and the second inductor part are reinforced in the same direction.
    Type: Application
    Filed: December 16, 2020
    Publication date: February 9, 2023
    Inventors: Noriyuki NOSAKA, Chen CHEN, Takanori ISHII, Wataru OKADA
  • Patent number: 11552550
    Abstract: A voltage balance circuit including first and second semiconductor devices connected in series with each other is provided with a first transformer having a primary winding and a secondary winding, a second transformer having a primary winding and a secondary winding. A pair of capacitors connected in series with each other and connected between the output terminals of the plurality of semiconductor devices. A first control signal is applied to the control electrode of the first semiconductor device via the primary winding of the first transformer. A second control signal is applied to the control electrode of the second semiconductor device via the primary winding of the second transformer, with one end of each secondary winding connected to each other.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: January 10, 2023
    Assignee: OMRON CORPORATION
    Inventors: Noriyuki Nosaka, Wataru Okada, Chen Chen, Takanori Ishii
  • Patent number: 11496125
    Abstract: A driver circuit controls a first switch element. A first resistor is connected between the driver circuit and the first switch element. A second switch element is connected to the first switch element. An overcurrent detector circuit controls the second switch element based on an overcurrent current flowing through the first switch element. A second resistor is connected between the overcurrent detector circuit and the second switch element. The first and second resistor is set such that a turn-off time of the first switch element when the second switch element is turned on by the overcurrent detector circuit is longer than a turn-off time of the first switch element when the first switch element is turned off by the driver circuit.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: November 8, 2022
    Assignee: OMRON CORPORATION
    Inventors: Wataru Okada, Satoshi Iwai, Noriyuki Nosaka, Takeo Nishikawa, Kenji Kobayashi, Keiji Shiraishi
  • Publication number: 20220294041
    Abstract: An exterior package, a main body portion, and a detection unit are provided. The main body portion is disposed inside the exterior package. The detection unit detects a state of a power storage cell and performs wireless communication, at least a portion of the detection unit being disposed inside the exterior package.
    Type: Application
    Filed: February 25, 2022
    Publication date: September 15, 2022
    Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Naotake YOSHIDA, Yusuke FUJII, Mitsutoshi TAJIMA, Wataru OKADA, Satoru MATSUYAMA, Kensaku FUKUMOTO, Junya YANO
  • Publication number: 20220263182
    Abstract: A method of manufacturing a power storage module includes: stacking a plurality of power storage cells along a first direction; compressing the plurality of power storage cells along the first direction; aligning the plurality of power storage cells in a second direction orthogonal to the first direction after relieving pressing force of the compressing; compressing the plurality of power storage cells along the first direction after aligning the plurality of power storage cells in the second direction; disposing a restraint portion on both sides in the first direction with respect to the plurality of power storage cells under application of pressing force of the compressing; and restraining the plurality of power storage cells by the restraint portion along the first direction by relieving, after disposing the restraint portion, the pressing force of the compressing.
    Type: Application
    Filed: February 15, 2022
    Publication date: August 18, 2022
    Inventors: Wataru OKADA, Seiichi SAKURAMOTO
  • Publication number: 20220255203
    Abstract: A first conductor is provided on a bottom portion and is electrically connected to a power storage module. A second conductor is provided on the bottom portion side of a cover portion and can be brought into contact with and separated from the first conductor. When the first conductor and the second conductor are brought into contact with each other to close the opening/closing mechanism in a state in which the cover portion is attached to the bottom portion, power is supplied from the power storage module through the power supply path. When the first conductor and the second conductor are separated from each other to open the opening/closing mechanism in a state in which the cover portion is detached from the bottom portion, the supply of power from the power storage module through the power supply path is interrupted.
    Type: Application
    Filed: February 7, 2022
    Publication date: August 11, 2022
    Inventors: Satoru MATSUYAMA, Naotake YOSHIDA, Wataru OKADA
  • Patent number: 11374290
    Abstract: A plurality of battery cells each having a positive electrode terminal and a negative electrode terminal; and a bus bar which connects the electrode terminals facing each other in the battery cells adjacently disposed among the plurality of battery cells.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: June 28, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Wataru Okada, Shinji Ota, Yoshiaki Ueta
  • Patent number: 11329546
    Abstract: A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermining switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit induces first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than the switching frequency by insertion of the inductor.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: May 10, 2022
    Assignee: OMRON CORPORATION
    Inventors: Noriyuki Nosaka, Takeo Nishikawa, Wataru Okada, Satoshi Iwai, Takanori Ishii, Gun Eto
  • Publication number: 20220123405
    Abstract: A power storage device includes: a power storage module including a plurality of stacked power storage cells; and a case having an inner space to accommodate the power storage module. The case includes a main body provided with an opening on an electrode terminal side of the plurality of power storage cells, a cover provided over the opening, and a tapered portion that narrows a width of the inner space in a direction from the opening toward a lower side of the main body.
    Type: Application
    Filed: October 19, 2021
    Publication date: April 21, 2022
    Inventors: Taijyu Morishita, Wataru Okada
  • Publication number: 20220123420
    Abstract: Each of a plurality of power storage cells includes an top surface provided with an electrode terminal, a bottom surface opposite to the top surface, and a side surface contiguous to the top surface and the bottom surface. A case includes a main body provided with an opening on the side surface side of the plurality of power storage cells, and a cover provided over the opening. The case has a first inner side surface and a second inner side surface each facing the side surfaces of the plurality of power storage cells. A power storage device includes biasing means for biasing the plurality of power storage cells toward the second inner side surface of the case, the biasing means being provided between the first inner side surface of the case and the plurality of power storage cells.
    Type: Application
    Filed: October 13, 2021
    Publication date: April 21, 2022
    Inventors: Taijyu Morishita, Wataru Okada
  • Patent number: 11289773
    Abstract: A power supply device has; a battery stacked body where a plural sheets of battery cells each having a positive electrode terminal and a negative electrode terminal at one surface thereof are stacked; and a plurality of bus bars which connect the electrode terminals in the battery cells adjacently disposed. Each of the bus bars partially has a thin area whose thickness is thinner than a thickness of the other area, and an open window formed in the dun area, and opening a portion thereof. The thin area is formed in an oval shape elongated in the battery cell stacking direction, and the open window extends in a direction along the length of the oval shape. This configuration allows the thin area, above and below the length side of the oval shaped thin area, to be secured as a joining area for laser welding or the like.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: March 29, 2022
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Wataru Okada, Shinji Ota, Tetsuya Shiizaki
  • Publication number: 20220069398
    Abstract: A power storage device includes: a power storage module in which a plurality of power storage cells are stacked along a stacking direction; and a case that accommodates the power storage module, wherein each of the power storage cells in the power storage module has a main surface extending in a direction substantially orthogonal to the stacking direction, and the case includes a supporting portion that supports, along the stacking direction, the power storage module accommodated in the case, and the case is provided with a recess that is provided at a position different from the supporting portion and that opens toward the main surface.
    Type: Application
    Filed: August 16, 2021
    Publication date: March 3, 2022
    Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Taijyu MORISHITA, Wataru OKADA
  • Publication number: 20220060101
    Abstract: A voltage balance circuit including first and second semiconductor devices connected in series with each other is provided with a first transformer having a primary winding and a secondary winding, a second transformer having a primary winding and a secondary winding. A pair of capacitors connected in series with each other and connected between the output terminals of the plurality of semiconductor devices. A first control signal is applied to the control electrode of the first semiconductor device via the primary winding of the first transformer. A second control signal is applied to the control electrode of the second semiconductor device via the primary winding of the second transformer, with one end of each secondary winding connected to each other.
    Type: Application
    Filed: March 14, 2019
    Publication date: February 24, 2022
    Inventors: Noriyuki NOSAKA, Wataru OKADA, Chen CHEN, Takanori ISHII
  • Publication number: 20220045536
    Abstract: A charging system includes a power transfer device and a rapid charging battery. The power transfer device includes a first power transfer unit being compatible with a first charging standard specifying that the rapid charging battery is to be charged at a predetermined current value. The rapid charging battery includes a first charging unit being compatible with the first charging standard, and a second power transfer unit being compatible with a second charging standard specifying that power is to be transferred at a predetermined current value that is lower than the predetermined current value specified by the first charging standard.
    Type: Application
    Filed: July 19, 2021
    Publication date: February 10, 2022
    Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.
    Inventors: Kodai NAGANO, Atsushi SUGIHARA, Shizuka MASUOKA, Sokichi OKUBO, Hiroyuki OBATA, Hiroshi TEMMYO, Yuki YOSHIKAWA, Jun NISHIKAWA, Wataru OKADA, Iwao NITTA