Patents by Inventor Kaoru Koiwa
Kaoru Koiwa 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: 20220360100Abstract: A device according to one embodiment includes a first battery to output alternating-current power for driving a motor and connected to a first main circuit that is connected to an inverter; a second battery connected to a second main circuit, having a storage capacity larger than it of the first battery, and having a permissible power output per unit storage capacity smaller than it of the first battery; a DC/DC converter to convert a voltage of the second main circuit to a predetermined voltage and output to the first main circuit; a control circuit to control charging and discharging operations of the first and the second battery and an operation of the DC/DC converter; a first terminal connected to a positive terminal of the first battery; and a second terminal connected to a negative terminal of the first battery.Type: ApplicationFiled: July 21, 2022Publication date: November 10, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Koji TAKAZAWA, Kazuto KURODA, Akio NISHIMAKI, Yoshiyuki ISOZAKI, Kaoru KOIWA, Makoto MATSUOKA, Hiroshi KUSAJIMA, Motoshige IKEDA, Takuya IWASAKI
-
Patent number: 11300625Abstract: According to one embodiment, an evaluation device for an energy storage device includes first processing circuitry and second processing circuitry. The first processing circuitry acquires data items including an amount of charge and a voltage value measured in a measurement period from the energy storage device, the energy storage device being charge-discharge-controlled according to charge-discharge command values. The second processing circuitry generates a representative data item of voltage values for amounts of charge, based on the data items acquired for the measurement period; and evaluates a degradation state of the energy storage device, based on a relative change between a plurality of the representative data items corresponding to a plurality of the measurement periods.Type: GrantFiled: September 11, 2019Date of Patent: April 12, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro Yamamoto, Hisaaki Hatano, Kenichi Fujiwara, Masatake Sakuma, Kaoru Koiwa, Yasuhiro Ogura, Takenori Kobayashi, Kenji Mitsumoto
-
Patent number: 11264672Abstract: According to embodiments, a pressure relief mechanism comprises a case with an installation hole formed therein, and a pressure relief valve. The pressure relief valve comprises an insertion portion which comprising a vent path formed in an axial portion of the insertion portion and a slit formed in a peripheral wall portion of the insertion portion so as to communicate with the vent path, a pedestal portion provided at an outer end of the insertion portion, a locking portion provided at an inner end of the insertion portion and locked on an inner edge of the installation hole, and a ring-like seal member interposed between around the installation hole and the pedestal portion, the seal portion comprising an elastic member.Type: GrantFiled: August 28, 2019Date of Patent: March 1, 2022Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Takaya Ogawa, Kaoru Koiwa, Keitaro Hino, Shinya Aikawa, Hiroaki Asai
-
Patent number: 11171393Abstract: According to one embodiment, a battery module includes a plurality of sub-modules. The plurality of sub-modules are integrated. Each of the plurality of sub-modules includes a cell group configured using a plurality of cells connected in series. The plurality of cells configuring the cell group are arranged linearly such that intra-cell current directions are parallel and the intra-cell current direction of each of the cells is opposite to the intra-cell current direction of the cell adjacent to each cell in the cell group. Each of the plurality of sub-modules includes an input terminal to input a current to the cell group and an output terminal to output the current from the cell group.Type: GrantFiled: February 20, 2020Date of Patent: November 9, 2021Assignee: Kabushiki Kaisha ToshibaInventors: Hiroyuki Kobayashi, Tomomi Kageyama, Takeshi Yasuda, Kaoru Koiwa, Seiji Ito, Tomonori Ezoe
-
Publication number: 20210178927Abstract: There is provided a rechargeable battery evaluation device including: a charging controller configured to switch charging current of a rechargeable battery being charged with first current to second current; and a first state estimator configured to estimate a state of the rechargeable battery based on a feature of change in at least one of a voltage and a charging amount of the rechargeable battery due to switching from the charging current to the second current.Type: ApplicationFiled: February 26, 2021Publication date: June 17, 2021Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Takahiro YAMAMOTO, Kaoru KOIWA, Hisaaki HATANO, Kenichi FUJIWARA, Kohei MARUCHI, Koji TAKAZAWA, Yoshiyuki ISOZAKI, Shun EGUSA, Tomokazu MORITA
-
Publication number: 20200233037Abstract: According to one embodiment, an evaluation device for an energy storage device includes first processing circuitry and second processing circuitry. The first processing circuitry acquires data items including an amount of charge and a voltage value measured in a measurement period from the energy storage device, the energy storage device being charge-discharge-controlled according to charge-discharge command values. The second processing circuitry generates a representative data item of voltage values for amounts of charge, based on the data items acquired for the measurement period; and evaluates a degradation state of the energy storage device, based on a relative change between a plurality of the representative data items corresponding to a plurality of the measurement periods.Type: ApplicationFiled: September 11, 2019Publication date: July 23, 2020Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATIONInventors: Takahiro YAMAMOTO, Hisaaki Tatano, Kenichi Fujiwara, Masatake Sakuma, Kaoru Koiwa, Yasuhiro Ogura, Takenori Kobayashi, Kenji Mitsumoto
-
Publication number: 20200185687Abstract: According to one embodiment, a battery module includes a plurality of sub-modules. The plurality of sub-modules are integrated. Each of the plurality of sub-modules includes a cell group configured using a plurality of cells connected in series. The plurality of cells configuring the cell group are arranged linearly such that intra-cell current directions are parallel and the intra-cell current direction of each of the cells is opposite to the intra-cell current direction of the cell adjacent to each cell in the cell group. Each of the plurality of sub-modules includes an input terminal to input a current to the cell group and an output terminal to output the current from the cell group.Type: ApplicationFiled: February 20, 2020Publication date: June 11, 2020Applicant: Kabushiki Kaisha ToshibaInventors: Hiroyuki KOBAYASHI, Tomomi Kageyama, Takeshi Yasuda, Kaoru Koiwa, Seiji Ito, Tomonori Ezoe
-
Patent number: 10608229Abstract: According to one embodiment, a battery module includes a plurality of sub-modules. The plurality of sub-modules are integrated. Each of the plurality of sub-modules includes a cell group configured using a plurality of cells connected in series. The plurality of cells configuring the cell group are arranged linearly such that intra-cell current directions are parallel and the intra-cell current direction of each of the cells is opposite to the intra-cell current direction of the cell adjacent to each cell in the cell group. Each of the plurality of sub-modules includes an input terminal to input a current to the cell group and an output terminal to output the current from the cell group.Type: GrantFiled: September 6, 2016Date of Patent: March 31, 2020Assignee: Kabushiki Kaisha ToshibaInventors: Hiroyuki Kobayashi, Tomomi Kageyama, Takeshi Yasuda, Kaoru Koiwa, Seiji Ito, Tomonori Ezoe
-
Patent number: 10529969Abstract: According to embodiments, a pressure relief mechanism comprises a case with an installation hole formed therein, and a pressure relief valve. The pressure relief valve comprises an insertion portion which comprising a vent path formed in an axial portion of the insertion portion and a slit formed in a peripheral wall portion of the insertion portion so as to communicate with the vent path, a pedestal portion provided at an outer end of the insertion portion, a locking portion provided at an inner end of the insertion portion and locked on an inner edge of the installation hole, and a ring-like seal member interposed between around the installation hole and the pedestal portion, the seal portion comprising an elastic member.Type: GrantFiled: September 14, 2017Date of Patent: January 7, 2020Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Takaya Ogawa, Kaoru Koiwa, Keitaro Hino, Shinya Aikawa, Hiroaki Asai
-
Publication number: 20190386271Abstract: According to embodiments, a pressure relief mechanism comprises a case with an installation hole formed therein, and a pressure relief valve. The pressure relief valve comprises an insertion portion which comprising a vent path formed in an axial portion of the insertion portion and a slit formed in a peripheral wall portion of the insertion portion so as to communicate with the vent path, a pedestal portion provided at an outer end of the insertion portion, a locking portion provided at an inner end of the insertion portion and locked on an inner edge of the installation hole, and a ring-like seal member interposed between around the installation hole and the pedestal portion, the seal portion comprising an elastic member.Type: ApplicationFiled: August 28, 2019Publication date: December 19, 2019Applicants: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Takaya OGAWA, Kaoru KOIWA, Keitaro HINO, Shinya AIKAWA, Hiroaki ASAI
-
Patent number: 10144305Abstract: According to some embodiments, a battery control device has a current detector, a storage, and a state determiner. The current detector detects a current value of a current which flows into a second battery which is connected in parallel to a first battery. The first battery and the second battery are charged with a fixed current. The storage stores an initial value of the current which flows into the second battery if the second battery is charged with the fixed current in an initial use stage of the second battery. The state determiner determines a state of the first battery based on the current value detected by the current detector and the initial value stored in the storage.Type: GrantFiled: June 28, 2016Date of Patent: December 4, 2018Assignee: Kabushiki Kaisha ToshibaInventors: Kaoru Koiwa, Hitoshi Nirasawa, Hideo Yamasaki, Takeshi Yasuda, Hiroki Matsushita, Tomomi Kageyama
-
Patent number: 10109841Abstract: According to one embodiment, in a storage cell system, cell lines each formed by connecting a prescribed number of storage cells in series are connected in parallel to form a storage cell module. Each unit is formed by connecting a prescribed number of storage cell modules in parallel. Outputs of a number of units corresponding to load capacity are linked in parallel and supplied to a load. At this time, current is limited to an extent that the storage cells are not damaged by interposing a current-limiting resistor in an output line of the storage cell module.Type: GrantFiled: December 12, 2017Date of Patent: October 23, 2018Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Hiroyuki Kobayashi, Fujio Nomura, Kaoru Koiwa, Takeshi Yasuda, Tomomi Kageyama
-
Publication number: 20180102529Abstract: According to one embodiment, in a storage cell system, cell lines each formed by connecting a prescribed number of storage cells in series are connected in parallel to form a storage cell module. Each unit is formed by connecting a prescribed number of storage cell modules in parallel. Outputs of a number of units corresponding to load capacity are linked in parallel and supplied to a load. At this time, current is limited to an extent that the storage cells are not damaged by interposing a current-limiting resistor in an output line of the storage cell module.Type: ApplicationFiled: December 12, 2017Publication date: April 12, 2018Applicant: Kabushiki Kaisha ToshibaInventors: Hiroyuki KOBAYASHI, Fujio Nomura, Kaoru Koiwa, Takeshi Yasuda, Tomomi Kageyama
-
Publication number: 20180097214Abstract: According to embodiments, a pressure relief mechanism comprises a case with an installation hole formed therein, and a pressure relief valve. The pressure relief valve comprises an insertion portion which comprising a vent path formed in an axial portion of the insertion portion and a slit formed in a peripheral wall portion of the insertion portion so as to communicate with the vent path, a pedestal portion provided at an outer end of the insertion portion, a locking portion provided at an inner end of the insertion portion and locked on an inner edge of the installation hole, and a ring-like seal member interposed between around the installation hole and the pedestal portion, the seal portion comprising an elastic member.Type: ApplicationFiled: September 14, 2017Publication date: April 5, 2018Applicants: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Takaya OGAWA, Kaoru Koiwa, Keitaro Hino, Shinya Aikawa, Hiroaki Asai
-
Publication number: 20170263910Abstract: According to one embodiment, a battery module includes a plurality of sub-modules. The plurality of sub-modules are integrated. Each of the plurality of sub-modules includes a cell group configured using a plurality of cells connected in series. The plurality of cells configuring the cell group are arranged linearly such that intra-cell current directions are parallel and the intra-cell current direction of each of the cells is opposite to the intra-cell current direction of the cell adjacent to each cell in the cell group. Each of the plurality of sub-modules includes an input terminal to input a current to the cell group and an output terminal to output the current from the cell group.Type: ApplicationFiled: September 6, 2016Publication date: September 14, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Hiroyuki KOBAYASHI, Tomomi KAGEYAMA, Takeshi YASUDA, Kaoru KOIWA, Seiji ITO, Tomonori EZOE
-
Publication number: 20170158080Abstract: According to some embodiments, a battery control device has a current detector, a storage, and a state determiner. The current detector detects a current value of a current which flows into a second battery which is connected in parallel to a first battery. The first battery and the second battery are charged with a fixed current. The storage stores an initial value of the current which flows into the second battery if the second battery is charged with the fixed current in an initial use stage of the second battery. The state determiner determines a state of the first battery based on the current value detected by the current detector and the initial value stored in the storage.Type: ApplicationFiled: June 28, 2016Publication date: June 8, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Kaoru KOIWA, Hitoshi Nirasawa, Hideo Yamasaki, Takeshi Yasuda, Hiroki Matsushita, Tomomi Kageyama
-
Patent number: 8169133Abstract: There is provided an image display apparatus including: a first substrate having an electron-emitting device; a second substrate having an anode electrode that is opposed to the electron-emitting device; and a conductive layer that is provided on the side of a second face of the second substrate, the second face being an opposite face to a first face of the second substrate, the first face being located on the first substrate side, wherein a potential of the conductive layer is set to be lower than a potential of the anode electrode when displaying an image; and a surface resistance of the conductive layer is higher than a surface resistance of the anode electrode.Type: GrantFiled: December 20, 2007Date of Patent: May 1, 2012Assignees: Canon Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Takashi Date, Kaoru Koiwa, Takahiro Oguchi, Keiji Suzuki
-
Patent number: 7821190Abstract: An image display apparatus includes a display unit including a substrate having an outer surface and an image display area, a conductive layer disposed on the substrate via an adhesive layer, and a conductive tape disposed on the outer surface of the substrate. In addition, a member holds the conductive layer against the substrate. Part of the adhesive layer is layered between the conductive tape and at least a part of the conductive layer, with the conductive tape including a projection portion contacting the conductive layer such that the conductive layer and the conductive tape are electrically connected. The member sandwiches the conductive layer, the conductive tape having the projection portion, and the display unit, and the conductive tape is a ground potential.Type: GrantFiled: August 23, 2007Date of Patent: October 26, 2010Assignees: Canon Kabushiki Kaisha, Kabushiki Kaisha ToshibaInventors: Takashi Date, Kaoru Koiwa, Takahiro Oguchi
-
Publication number: 20080157666Abstract: There is provided an image display apparatus including: a first substrate having an electron-emitting device; a second substrate having an anode electrode that is opposed to the electron-emitting device; and a conductive layer that is provided on the side of a second face of the second substrate, the second face being an opposite face to a first face of the second substrate, the first face being located on the first substrate side, wherein a potential of the conductive layer is set to be lower than a potential of the anode electrode when displaying an image; and a surface resistance of the conductive layer is higher than a surface resistance of the anode electrode.Type: ApplicationFiled: December 20, 2007Publication date: July 3, 2008Applicants: CANON KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: TAKASHI DATE, KAORU KOIWA, TAKAHIRO OGUCHI, KEIJI SUZUKI
-
Publication number: 20080054786Abstract: An image display apparatus comprises: a display unit 1000 including a substrate 1003 having an outer surface provided with an image display area 1001; a conductive layer 1022 that is disposed on the substrate 1003 via an adhesive layer 1021; and an electrode 1002 that is disposed on at least a part of the area except for the image display area 1001 on the outer surface of the substrate 1003. The electrode 1002 and at least a part of the conductive layer 1022 are layered via a part of the adhesive layer 1021, and the electrode 1002 and the conductive layer 1022 are electrically connected.Type: ApplicationFiled: August 23, 2007Publication date: March 6, 2008Applicants: CANON KABUSHIKI KAISHA, KABUSHIKI KAISHA TOSHIBAInventors: Takashi Date, Kaoru Koiwa, Takahiro Oguchi