Patents by Inventor Isao Fujiwara

Isao Fujiwara 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: 11121439
    Abstract: A secondary battery includes a case composed of a metal containing aluminum as a main component, a stacked electrode assembly arranged in the case, a negative electrode current collector electrically connecting negative electrodes of the stacked electrode assembly to a negative electrode terminal, a positive electrode current collector electrically connecting positive electrodes of the stacked electrode assembly to a positive electrode terminal, a first metal plate arranged between the case and the stacked electrode assembly, and a spacer arranged between the case and the first metal plate, the spacer being composed of an insulating material. The positive electrodes are electrically connected to the case or a second metal plate arranged on the first metal plate with an insulating member provided between the first metal plate and the insulating member.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 14, 2021
    Assignee: PANASONIC CORPORATION
    Inventors: Kozo Watanabe, Isao Fujiwara, Kaori Ishikawa
  • Patent number: 11056984
    Abstract: An inverter control device that controls an inverter connected to a direct-current power supply and connected to an alternating-current rotating electrical machine to convert electric power between direct current and alternating current of a plurality of phases, the inverter control device including an electronic control unit that is configured to perform, in a state in which one switching element of a plurality of switching elements included in the inverter has a turn-off failure in which the switching element always goes into an off state, torque reduction control for reducing torque of the rotating electrical machine or deceleration control for outputting torque in a reverse direction from a rotation direction of the rotating electrical machine by performing switching control of the plurality of switching elements.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: July 6, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Masashi Miyazaki, Subrata Saha, Isao Fujiwara, Yuki Sugiyama
  • Publication number: 20210167702
    Abstract: Two inverters provided at respective both ends of open-end windings are appropriately controlled. A rotating electrical machine control device (1) that can control a first inverter (11) and a second inverter (12) by a plurality of control schemes, respectively, the control schemes differing from each other in at least one of a switching pattern and a switching frequency and being independent of each other, has a control mode in which the first inverter (11) and the second inverter (12) are controlled by the same control scheme in a first speed region (VR1) in which the rotational speed of a rotating electrical machine (80), and the first inverter (11) and the second inverter (12) are controlled by different control schemes in a second speed region (VR2) in which the rotational speed of the rotating electrical machine (80) is higher than in the first speed region (VR1).
    Type: Application
    Filed: August 30, 2019
    Publication date: June 3, 2021
    Applicant: AISIN AW CO., LTD.
    Inventors: Subrata SAHA, Isao FUJIWARA
  • Publication number: 20200389115
    Abstract: Two inverters provided at both ends of each open-end winding, respectively, are appropriately controlled. A rotating electrical machine control device (1) that has at least two control schemes among pulse width modulation control, active short-circuit control, and rectangular-wave control, as control schemes for a first inverter (11) and a second inverter (12), and that can control the first inverter (11) and the second inverter (12) by control schemes which are independent of each other considers one of the plurality of control schemes as a first control scheme and one of the plurality of control schemes different than the first control scheme as a second control scheme, and has a control mode in which the first inverter (11) is controlled by the first control scheme and the second inverter (12) is controlled by the second control scheme.
    Type: Application
    Filed: January 17, 2019
    Publication date: December 10, 2020
    Applicant: AISIN AW CO.,LTD.
    Inventors: Subrata SAHA, Isao FUJIWARA
  • Publication number: 20200220479
    Abstract: An inverter control device that controls an inverter connected to a direct-current power supply and connected to an alternating-current rotating electrical machine to convert electric power between direct current and alternating current of a plurality of phases, the inverter control device including an electronic control unit that is configured to perform, in a state in which one switching element of a plurality of switching elements included in the inverter has a turn-off failure in which the switching element always goes into an off state, torque reduction control for reducing torque of the rotating electrical machine or deceleration control for outputting torque in a reverse direction from a rotation direction of the rotating electrical machine by performing switching control of the plurality of switching elements.
    Type: Application
    Filed: September 28, 2018
    Publication date: July 9, 2020
    Applicant: AISIN AW CO., LTD.
    Inventors: Masashi MIYAZAKI, Subrata SAHA, Isao FUJIWARA, Yuki SUGIYAMA
  • Publication number: 20200194753
    Abstract: Provided is a power storage device comprising: a battery stack in which a plurality of secondary batteries and a plurality of spacers are alternately arranged; a pair of end plates disposed on both sides in the first direction of the battery stack; and a compression spring serving as a pressurizing means for pressurizing the battery stack. Each of the secondary batteries includes an electrode body and an outer case. The outer case has a projection that swells towards the inside so as to press the electrode body in the first direction and deforms with expansion of the electrode body.
    Type: Application
    Filed: December 18, 2019
    Publication date: June 18, 2020
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Isao Fujiwara, Yoshitaka Shinyashiki
  • Patent number: 10644301
    Abstract: An electrode body including a positive electrode plate and a negative electrode plate include a positive electrode tab portion at an end portion on a sealing plate side, a positive electrode collector electrically connected to the positive electrode plate include a collector body portion, a collector extension portion, a collector connection, and a collector connection portion. A pressure-sensitive current breaking mechanism includes a conductive member having an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion disposed on the electrode body side of the deformation plate and connected to the deformation plate. The collector extension portion is offset from the collector body portion and is disposed on the sealing plate side with respect to the collector body portion. Positive electrode tab portion is connected to the collector connection bent back at an end portion of the collector extension portion.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: May 5, 2020
    Assignees: SANYO Electric Co., Ltd., PANASONIC CORPORATION
    Inventors: Ryoichi Wakimoto, Kazuhiro Kitaoka, Isao Fujiwara, Hiromasa Yagi
  • Patent number: 10535860
    Abstract: A nonaqueous electrolyte secondary battery includes a conductive outer can, an electrode body in the outer can, a conductive seal plate tightly closing an open end of the outer can, and a cathode external terminal on the seal plate. The battery further includes a current cutoff mechanism (CID). The CID is located on the electrical conduction pathway between the cathode external terminal and the electrode body and interrupts the electrical coupling therebetween in response to an increased internal pressure in the battery. The CID includes a thin portion of the seal plate and a diaphragm. The diaphragm deforms to interrupt the electrical coupling between the cathode external terminal and the electrode body in response to the increase in the internal pressure in the battery. A cathode collector lead electrically couples the electrode body and the seal plate, and the seal plate connects the diaphragm and the cathode collector lead.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: January 14, 2020
    Assignee: PANASONIC CORPORATION
    Inventors: Isao Fujiwara, Hiromasa Yagi
  • Publication number: 20190288270
    Abstract: An electrode body including a positive electrode plate and a negative electrode plate include a positive electrode tab portion at an end portion on a sealing plate side, a positive electrode collector electrically connected to the positive electrode plate include a collector body portion, a collector extension portion, a collector connection, and a collector connection portion. A pressure-sensitive current breaking mechanism includes a conductive member having an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion disposed on the electrode body side of the deformation plate and connected to the deformation plate. The collector extension portion is offset from the collector body portion and is disposed on the sealing plate side with respect to the collector body portion. Positive electrode tab portion is connected to the collector connection bent back at an end portion of the collector extension portion.
    Type: Application
    Filed: April 16, 2019
    Publication date: September 19, 2019
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Ryoichi Wakimoto, Kazuhiro Kitaoka, Isao Fujiwara, Hiromasa Yagi
  • Patent number: 10305084
    Abstract: An electrode body including a positive electrode plate and a negative electrode plate include a positive electrode tab portion at an end portion on a sealing plate side, a positive electrode collector electrically connected to the positive electrode plate include a collector body portion, a collector extension portion, a collector connection, and a collector connection portion. A pressure-sensitive current breaking mechanism includes a conductive member having an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion disposed on the electrode body side of the deformation plate and connected to the deformation plate. The collector extension portion is offset from the collector body portion and is disposed on the sealing plate side with respect to the collector body portion. Positive electrode tab portion is connected to the collector connection bent back at an end portion of the collector extension portion.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: May 28, 2019
    Assignees: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Ryoichi Wakimoto, Kazuhiro Kitaoka, Isao Fujiwara, Hiromasa Yagi
  • Patent number: 10243195
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode body and an electrolytic solution in an outer can and a cathode external terminal on the open-end side of the outer can. The battery further includes a current cutoff mechanism (CID). The CID is located on the electrical conduction pathway between the cathode external terminal and the electrode body and interrupts the electrical coupling therebetween in response to an increased internal pressure in the battery. The CID includes a seal lead, a diaphragm, and a dielectric film. The seal lead has a cylindrical opening on the electrode body side. The diaphragm tightly closes the cylindrical opening and, in response to the increased internal pressure in the battery, deforms to interrupt the electrical coupling between the electrode body and the seal lead. The dielectric film is on the electrode body side of the diaphragm.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: March 26, 2019
    Assignee: Panasonic Corporation
    Inventors: Isao Fujiwara, Hiromasa Yagi
  • Patent number: 9985261
    Abstract: A separator according to the present disclosure includes cellulose fibers and fluororesin particles.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: May 29, 2018
    Assignee: Panasonic Corporation
    Inventors: Nobuhiro Hirano, Isao Fujiwara, Masaru Watanabe
  • Patent number: 9703008
    Abstract: A thin optical film with high hygrothermal durability and high front contrast, includes cellulose acylate whose degree of substitution of acyl group is from 2.0 to 2.6 and at least one optical performance developer, wherein the cellulose acylate has a mannose content of 0.2% by mass or less, and the optical film has a thickness of 40 ?m or thinner and satisfies: MA?MB×1.1??Formula I CA?CB×1.1??Formula II wherein, A denotes the depthwise region ranging from one surface up to 2 ?m depth of the optical film, and B denotes the depthwise region ranging from the other surface up to 2 ?m depth, and MA and MB represent the mannose content in regions A and B; CA and CB represent the content of the optical performance developer in regions A and B; and MA, MB, CA and CB are given in % by mass.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: July 11, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Hirofumi Toyama, Yoshinori Maeda, Isao Fujiwara, Ryuji Saneto
  • Publication number: 20170187025
    Abstract: A secondary battery includes a case composed of a metal containing aluminum as a main component, a stacked electrode assembly arranged in the case, a negative electrode current collector electrically connecting negative electrodes of the stacked electrode assembly to a negative electrode terminal, a positive electrode current collector electrically connecting positive electrodes of the stacked electrode assembly to a positive electrode terminal, a first metal plate arranged between the case and the stacked electrode assembly, and a spacer arranged between the case and the first metal plate, the spacer being composed of an insulating material. The positive electrodes are electrically connected to the case or a second metal plate arranged on the first metal plate with an insulating member provided between the first metal plate and the insulating member.
    Type: Application
    Filed: November 29, 2016
    Publication date: June 29, 2017
    Inventors: KOZO WATANABE, ISAO FUJIWARA, KAORI ISHIKAWA
  • Patent number: 9614249
    Abstract: A separator according to the present disclosure is a separator for a non-aqueous electrolyte secondary battery that includes a porous layer that contains cellulose fibers and resin particles. The ratio of the amount of the resin particles to the total amount of the cellulose fibers and the resin particles increases with decreasing distance from one surface of the porous layer.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: April 4, 2017
    Assignee: PANASONIC CORPORATION
    Inventors: Isao Fujiwara, Nobuhiro Hirano, Masaru Watanabe
  • Publication number: 20170077485
    Abstract: A nonaqueous electrolyte secondary battery includes a conductive outer can, an electrode body in the outer can, a conductive seal plate tightly closing an open end of the outer can, and a cathode external terminal on the seal plate. The battery further includes a current cutoff mechanism (CID). The CID is located on the electrical conduction pathway between the cathode external terminal and the electrode body and interrupts the electrical coupling therebetween in response to an increased internal pressure in the battery. The CID includes a thin portion of the seal plate and a diaphragm. The diaphragm deforms to interrupt the electrical coupling between the cathode external terminal and the electrode body in response to the increase in the internal pressure in the battery. A cathode collector lead electrically couples the electrode body and the seal plate, and the seal plate connects the diaphragm and the cathode collector lead.
    Type: Application
    Filed: July 14, 2016
    Publication date: March 16, 2017
    Inventors: ISAO FUJIWARA, HIROMASA YAGI
  • Publication number: 20170062796
    Abstract: A nonaqueous electrolyte secondary battery includes an electrode body and an electrolytic solution in an outer can and a cathode external terminal on the open-end side of the outer can. The battery further includes a current cutoff mechanism (CID). The CID is located on the electrical conduction pathway between the cathode external terminal and the electrode body and interrupts the electrical coupling therebetween in response to an increased internal pressure in the battery. The CID includes a seal lead, a diaphragm, and a dielectric film. The seal lead has a cylindrical opening on the electrode body side. The diaphragm tightly closes the cylindrical opening and, in response to the increased internal pressure in the battery, deforms to interrupt the electrical coupling between the electrode body and the seal lead. The dielectric film is on the electrode body side of the diaphragm.
    Type: Application
    Filed: June 29, 2016
    Publication date: March 2, 2017
    Inventors: ISAO FUJIWARA, HIROMASA YAGI
  • Publication number: 20160336545
    Abstract: An electrode body including positive electrode plate and negative electrode plate includes a positive electrode tab portion at an end portion on the sealing plate side. The positive electrode plate is electrically connected to a positive electrode collector including a collector body portion and a collector connection. A pressure-sensitive current breaking mechanism includes a conductive member including an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion that is disposed on the electrode body side of the deformation plate and that is connected to the deformation plate. The collector connection is disposed between the current breaking mechanism and one of the large-area side walls of the prismatic outer package, and the positive electrode tab portion is connected to the collector connection.
    Type: Application
    Filed: May 12, 2016
    Publication date: November 17, 2016
    Applicants: SANYO Electric Co., Ltd., Panasonic Corporation
    Inventors: Ryoichi Wakimoto, Kazuhiro Kitaoka, Isao Fujiwara, Hiromasa Yagi
  • Publication number: 20160156008
    Abstract: A separator according to the present disclosure includes cellulose fibers and fluororesin particles.
    Type: Application
    Filed: November 9, 2015
    Publication date: June 2, 2016
    Inventors: NOBUHIRO HIRANO, ISAO FUJIWARA, MASARU WATANABE
  • Publication number: 20160156009
    Abstract: A separator for a nonaqueous electrolyte secondary battery according to the present disclosure includes cellulose fibers and resin particles having substituents bonded by hydrogen bonds with the cellulose fibers.
    Type: Application
    Filed: November 11, 2015
    Publication date: June 2, 2016
    Inventors: NOBUHIRO HIRANO, ISAO FUJIWARA, MASARU WATANABE