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).
-
Publication number: 20240079723Abstract: A polyolefin microporous membrane having a film thickness of 1 ?m to 30 ?m; an air permeability of 500 sec/100 cm3 or less; and a withstand voltage reduction rate of 1.0% or greater and 17.0% or less due to pressing under conditions of a temperature of 60° C., a pressure of 3.4 MPa, and a compression time of 1 sec or a withstand voltage reduction rate of 1.0% or greater and 28.0% or less due to pressing under conditions of a temperature of 70° C., a pressure of 8 MPa, and a compression time of 3 min, or having a polyethylene crystal long period before compression of 35.0 nm or more, measured by a small-angle X-ray scattering (SAXS) method, and a diffraction peak-to-peak distance of 2.410° or more and 2.600° or less derived from a (110) plane and a (200) plane of a polyethylene crystal before compression is provided.Type: ApplicationFiled: April 26, 2023Publication date: March 7, 2024Applicant: Asahi Kasei Kabushiki KaishaInventors: Wataru Mizutani, Tomosato Okubo, Masaaki Okada, Takeshi Matsubayashi
-
Patent number: 11848463Abstract: 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: GrantFiled: October 13, 2021Date of Patent: December 19, 2023Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Taijyu Morishita, Wataru Okada
-
Publication number: 20230387912Abstract: 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: ApplicationFiled: September 7, 2021Publication date: November 30, 2023Inventors: Noriyuki NOSAKA, Hironori TAUCHI, Takuro HASHIMOTO, Wataru OKADA, Mamoru SUEKI, Satoshi IWAI
-
Publication number: 20230327664Abstract: 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: ApplicationFiled: August 31, 2021Publication date: October 12, 2023Inventors: Noriyuki NOSAKA, Junya MISHIMA, Mamoru SUEKI, Wataru OKADA
-
Patent number: 11777169Abstract: 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: GrantFiled: February 15, 2022Date of Patent: October 3, 2023Assignee: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Wataru Okada, Seiichi Sakuramoto
-
Patent number: 11616261Abstract: 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: GrantFiled: May 9, 2017Date of Patent: March 28, 2023Assignee: SANYO Electric Co., Ltd.Inventors: Wataru Okada, Kosho Abe, Yusuke Fujii, Takeshi Nagane, Sho Ojima
-
Patent number: 11606021Abstract: 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: GrantFiled: March 11, 2019Date of Patent: March 14, 2023Assignee: OMRON CORPORATIONInventors: Noriyuki Nosaka, Takeo Nishikawa, Wataru Okada, Satoshi Iwai, Takanori Ishii, Gun Eto
-
Publication number: 20230043841Abstract: 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: ApplicationFiled: December 16, 2020Publication date: February 9, 2023Inventors: Noriyuki NOSAKA, Chen CHEN, Takanori ISHII, Wataru OKADA
-
Patent number: 11552550Abstract: 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: GrantFiled: March 14, 2019Date of Patent: January 10, 2023Assignee: OMRON CORPORATIONInventors: Noriyuki Nosaka, Wataru Okada, Chen Chen, Takanori Ishii
-
Patent number: 11496125Abstract: 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: GrantFiled: March 11, 2019Date of Patent: November 8, 2022Assignee: OMRON CORPORATIONInventors: Wataru Okada, Satoshi Iwai, Noriyuki Nosaka, Takeo Nishikawa, Kenji Kobayashi, Keiji Shiraishi
-
Publication number: 20220294041Abstract: 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: ApplicationFiled: February 25, 2022Publication date: September 15, 2022Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Naotake YOSHIDA, Yusuke FUJII, Mitsutoshi TAJIMA, Wataru OKADA, Satoru MATSUYAMA, Kensaku FUKUMOTO, Junya YANO
-
Publication number: 20220263182Abstract: 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: ApplicationFiled: February 15, 2022Publication date: August 18, 2022Inventors: Wataru OKADA, Seiichi SAKURAMOTO
-
Publication number: 20220255203Abstract: 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: ApplicationFiled: February 7, 2022Publication date: August 11, 2022Inventors: Satoru MATSUYAMA, Naotake YOSHIDA, Wataru OKADA
-
Patent number: 11374290Abstract: 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: GrantFiled: January 12, 2017Date of Patent: June 28, 2022Assignee: SANYO Electric Co., Ltd.Inventors: Wataru Okada, Shinji Ota, Yoshiaki Ueta
-
Patent number: 11329546Abstract: 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: GrantFiled: March 11, 2019Date of Patent: May 10, 2022Assignee: OMRON CORPORATIONInventors: Noriyuki Nosaka, Takeo Nishikawa, Wataru Okada, Satoshi Iwai, Takanori Ishii, Gun Eto
-
Publication number: 20220123405Abstract: 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: ApplicationFiled: October 19, 2021Publication date: April 21, 2022Inventors: Taijyu Morishita, Wataru Okada
-
Publication number: 20220123420Abstract: 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: ApplicationFiled: October 13, 2021Publication date: April 21, 2022Inventors: Taijyu Morishita, Wataru Okada
-
Patent number: 11289773Abstract: 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: GrantFiled: January 12, 2017Date of Patent: March 29, 2022Assignee: SANYO Electric Co., Ltd.Inventors: Wataru Okada, Shinji Ota, Tetsuya Shiizaki
-
Publication number: 20220069398Abstract: 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: ApplicationFiled: August 16, 2021Publication date: March 3, 2022Applicant: PRIME PLANET ENERGY & SOLUTIONS, INC.Inventors: Taijyu MORISHITA, Wataru OKADA
-
Publication number: 20220060101Abstract: 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: ApplicationFiled: March 14, 2019Publication date: February 24, 2022Inventors: Noriyuki NOSAKA, Wataru OKADA, Chen CHEN, Takanori ISHII