Patents by Inventor Akihiko Kudo
Akihiko Kudo 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).
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Publication number: 20090278094Abstract: The present invention provides semiconductor nanoparticles which emit light at room temperature and include a sulfide or oxide containing zinc, a Group 11 element in the periodic table, and a Group 13 element in the periodic table as a main component or a sulfide or oxide containing a Group 11 element in the periodic table and a Group 13 element in the periodic table as a main component. For example, the semiconductor nanoparticles are represented by Zn(1-2x)InxAgxS (O<x?0.5).Type: ApplicationFiled: August 30, 2006Publication date: November 12, 2009Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, OSAKA UNIVERSITY, NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY, TOKYO UNIVERSITY OF SCIENCE EDUCATIONAL FOUNDATION ADMINISTRATIVE ORGANIZATIONInventors: Tsukasa Torimoto, Susumu Kuwabata, Bunsho Ohtani, Tamaki Shibayama, Akihiko Kudo, Miwa Sakuraoka, Tomohiro Adachi
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Publication number: 20090261781Abstract: Lower order control devices control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: ApplicationFiled: April 1, 2009Publication date: October 22, 2009Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai
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Publication number: 20090243621Abstract: An assembled battery total voltage detection circuit includes a main control circuit, a divider resistor connected between a plus terminal and a minus terminal of an assembled battery insulated from the main control circuit, and a differential amplifier circuit that amplifies voltage divided by the divider resistor. A constant electric potential relative to a ground of the main control circuit is applied to a midpoint of the divider resistor. The main control circuit measures the voltage divided by the divider resistor via the differential amplifier circuit.Type: ApplicationFiled: February 19, 2009Publication date: October 1, 2009Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.Inventors: Akihiko KUDO, Mutsumi KIKUCHI, Masaki NAGAOKA
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Publication number: 20090224769Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell, a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: ApplicationFiled: March 31, 2009Publication date: September 10, 2009Inventors: Akihiko EMORI, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
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Publication number: 20090198399Abstract: A battery system for vehicle comprises a battery unit that is constituted with a plurality of serially connected cell groups each include a plurality of serially connected battery cells, integrated circuits that are each disposed in correspondence to one of the cell groups of the battery unit and each measure terminal voltages at the battery cells in the corresponding cell group, and a signal transmission path through which one of the integrated circuits is connected to another one of the integrated circuits or to a circuit other than that of the integrated circuits.Type: ApplicationFiled: January 28, 2009Publication date: August 6, 2009Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.Inventors: Kenji KUBO, Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori
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Publication number: 20090169987Abstract: Lower order control devices control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: ApplicationFiled: December 22, 2008Publication date: July 2, 2009Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai
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Publication number: 20090130541Abstract: A multi-series battery control system comprises battery cell groups each having a plurality of serially connected battery cells, a plurality of integrated circuits each disposed in correspondence to one of the battery cell groups and a battery control device that exchanges signals with the individual integrated circuits. Each integrated circuit includes an address setting means that receives a message unique to the integrated circuit, different from messages sent to other integrated circuits, from the battery control device, writes over an initialized address of the integrated circuit with the message and alters the message to a message with which an initialized address of another integrated circuit cannot be overwritten in a step assigned with an ordinal number matching the position of the integrated circuit with regard to the connection order.Type: ApplicationFiled: August 19, 2008Publication date: May 21, 2009Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.Inventors: Akihiko Emori, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo
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Patent number: 7528581Abstract: Lower order control devices control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: GrantFiled: June 27, 2006Date of Patent: May 5, 2009Assignees: Shin-Kobe Electric Machinery Co., Ltd., Hitachi, Ltd.Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai
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Publication number: 20090091332Abstract: A vehicle power supply device comprises a lithium battery module that includes a plurality of lithium battery cells, first control devices, voltage detection harnesses via which terminal voltages at individual lithium battery cells are input to the first control devices, a second control device and a signal transmission path through which signals are transmitted. The first control device comprises a selection circuit that selects terminal voltages at individual lithium battery cells, a voltage measurement circuit that measures the selected terminal voltages, balancing switches used to discharge individual lithium battery cells, a balancing switch control circuit that controls open/close of the balancing switches, and a diagnosis circuit for detecting an electrically abnormal connection in the detection harnesses.Type: ApplicationFiled: September 25, 2008Publication date: April 9, 2009Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.Inventors: Akihiko Emori, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo, Kenji Kubo
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Publication number: 20090087722Abstract: A vehicle power supply system comprises a battery module that includes a plurality of battery cells, battery cell control devices and a signal transmission path through which signals are transmitted. The battery cell control device comprises a voltage measurement circuit that measures terminal voltages at the battery cells, an abnormality diagnosis circuit that diagnoses an abnormality in the battery cell control device, a timing control circuit that outputs a signal for instructing measurement phase and a signal for instructing diagnosis phase, and a communication circuit that outputs a signal indicating the terminal voltage and a signal based upon a diagnosis result by the abnormality diagnosis circuit.Type: ApplicationFiled: September 25, 2008Publication date: April 2, 2009Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.Inventors: Kei Sakabe, Akihiko Emori, Akihiko Kudo, Kenji Kubo, Youhei Kawahara, Mutsumi Kikuchi, Tatsumi Yamauchi
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Publication number: 20090085516Abstract: An automotive power supply system comprises a battery module that includes serially connected battery groups each constituted with serially connected battery cells, integrated circuits each disposed in correspondence to one of the battery groups, a control circuit, a transmission path through which the integrated circuits are connected to the control circuit and a relay circuit via which an electrical current is supplied from the battery module. In response to a start signal instructing an operation start and received via the transmission path, each integrated circuit measures terminal voltages at the individual battery cells in the corresponding battery group and executes an abnormality diagnosis. If abnormality diagnosis results provided by the integrated circuits indicate no abnormality, the control circuit closes the relay, enabling supply of electrical current from the battery module and subsequently, the control circuit receives measurement results from the integrated circuits via the transmission path.Type: ApplicationFiled: August 19, 2008Publication date: April 2, 2009Applicants: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.Inventors: Akihiko EMORI, Youhei Kawahara, Kei Sakabe, Mutsumi Kikuchi, Tatsumi Yamauchi, Akihiko Kudo
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Patent number: 7511457Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.Type: GrantFiled: April 29, 2005Date of Patent: March 31, 2009Assignee: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
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Publication number: 20090021222Abstract: A cell controller capable of ensuring high safety even when a short occurs among voltage detecting lines without causing increased costs is provided. The cell controller 10 includes a unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 constituting a battery group through each voltage detecting line and a SOC adjusting circuit for adjusting a SOC of each unit cell 1 having resistors 2 for SOC adjustment, switching elements 6, and a bypass control section 8 to exercise on/off control on the switching elements 6. Each resistor 2 is connected in series to each voltage detecting line and the unit cell voltage detecting section 7 to detect a voltage of each unit cell 1 through each of the resistors 2.Type: ApplicationFiled: March 25, 2008Publication date: January 22, 2009Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Akihiko KUDO, Masaki NAGAOKA, Kenichiro TSURU, Mutsumi KIKUCHI, Tatsumi YAMAUCHI, Akihiko EMORI
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Patent number: 7471065Abstract: A multi-series battery control system comprises a unit battery cell of which unit consists of multiple battery cells, control IC comprising a control IC chip containing a control circuit for controlling the unit battery cell and a cell monitor IC chip for monitoring the voltage of the unit battery cell, and main controller that sends and receives signal to/from the control IC via insulation of which cell monitor IC chip and control IC chip are paired to control the unit battery cell.Type: GrantFiled: April 29, 2005Date of Patent: December 30, 2008Assignee: Shin-Kobe Electric Machinery Co., Ltd.Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
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Publication number: 20080284375Abstract: A cell controller with excellent reliability in which noise and soon are suppressed is provided. The cell controller includes, corresponding to the number of cell packs, a plurality of ICs each having a voltage detecting circuit detecting voltages of respective cells of a cell pack in which four cells are connected in series, a switch control circuit controlling conduction and a blocking operation of a plurality of switch elements connected in parallel to the respective cells via capacity adjusting resistors, a LIN1 terminal for inputting control information, a LIN2 terminal for outputting control information, a Vcc terminal and a GND terminal, and a LIN2 terminal of a higher-order IC and a LIN1 terminal of a lower-order IC are connected in a daisy chain.Type: ApplicationFiled: January 9, 2008Publication date: November 20, 2008Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Masaki Nagaoka, Akihiko Kudo, Mutsumi Kikuchi, Kenichiro Tsuru, Tatsumi Yamauchi, Akihiko Emori
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Publication number: 20080219337Abstract: The present invention provides enhanced serial communication reliability in a situation where a plurality of cell controllers and a battery controller are daisy-chained to form a serial communication configuration. While the plurality of cell controllers and the battery controller are daisy-chained to form a serial communication configuration, the battery controller or each cell controller includes a communication speed detection means, which detects the communication speed of data input from an additional controller, and a reception timing correction means, which corrects the reception timing for data input from the additional controller in accordance with the communication speed detected by the communication speed detection means.Type: ApplicationFiled: January 24, 2008Publication date: September 11, 2008Applicant: HITACHI VEHICLE ENERGY, LTD.Inventors: Takahiro Kawata, Akihiko Emori, Youhei Kawahara, Akihiko Kudo
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Publication number: 20080079395Abstract: Lower order control devices control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: ApplicationFiled: August 20, 2007Publication date: April 3, 2008Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai
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Publication number: 20080076011Abstract: There is provided a highly reliable storage battery apparatus which can diagnose the status of a temperature detection unit and a cooling unit. In the storage battery apparatus comprising a battery module including one or more batteries, a plurality of temperature detection units and a cooling unit cooling the battery module, the temperature detection units measure, at least, the temperature of the cooling medium inputted to the storage battery apparatus, the temperature of the cooling medium outputted from the storage battery apparatus, and the temperature of at least one of the batteries and the battery module.Type: ApplicationFiled: August 10, 2007Publication date: March 27, 2008Inventors: Akihiko Emori, Youhei Kawahara, Takahiro Kawata, Akihiko Kudo
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Publication number: 20080067978Abstract: Lower order control devices control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order. control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: ApplicationFiled: August 20, 2007Publication date: March 20, 2008Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai
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Publication number: 20080061740Abstract: Lower order control devices-control plural battery cells configuring plural battery modules. An input terminal of the low order control device in the highest potential, an output terminal of the low order control device in the lowest potential, and a high order control device are connected by isolating units, photocouplers. Diodes which prevent a discharge current of the battery cells in the battery modules are disposed between the output terminal of the low order control device and the battery cells in the battery module on the low potential side. Terminals related to input/output of a signal are electrically connected without isolating among the plural low order control devices.Type: ApplicationFiled: August 20, 2007Publication date: March 13, 2008Inventors: Hideki Miyazaki, Akihiko Emori, Akihiko Kudo, Tsuyoshi Kai