Patents by Inventor Shinya Nishikawa
Shinya Nishikawa 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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Patent number: 11277011Abstract: A voltage detector detects a voltage of each cell of a plurality of cells that are series-connected. A plurality of discharge circuits are respectively parallel-connected to the plurality of cells. A controller performs a control to equalize voltages or capacities of the plurality of cells to a target value by controlling discharge time of the plurality of discharge circuits, based on the voltages of the plurality of cells detected by the voltage detector. The controller sets the target value higher as an amount of change in the voltages of the plurality of cells in a predetermined period is larger.Type: GrantFiled: February 8, 2019Date of Patent: March 15, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Ryosuke Nagase, Shinya Nishikawa, Takashi Iida
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Patent number: 11277013Abstract: In a power storage system, a management device calculates a state of power (SOP) of a whole of a plurality of power storage blocks connected in parallel based on an SOP of each of the plurality of power storage blocks to specify the calculated SOP of the whole for an upper limit level of power or current for at least one of charging and discharging controlled by a power converter. When at least one of a plurality of switches is turned off to disconnect at least one (30) of the plurality of power storage blocks, the management device calculates an SOP of a whole of the remaining power storage blocks based on a deviation in current between each of the remaining power storage blocks to determine an upper limit level of power or current flowing into the power converter.Type: GrantFiled: April 26, 2018Date of Patent: March 15, 2022Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tohru Watanabe, Kazufumi Nishikawa, Shinya Nishikawa
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Publication number: 20220064428Abstract: A non-ohmic composition including a base elastomer and a plurality of non-ohmic particles, wherein, in a case of comparing volume resistivities ? for the non-ohmic composition within a range of E?Eth for the non-ohmic composition not elongated, the E being an electric field strength applied to the non-ohmic composition, the ? being the volume resistivity of the non-ohmic composition, and the Eth being a threshold electric field strength at a point where an absolute value of a variation in a slope of log ? with respect to log E is maximum, the volume resistivity ? for the non-ohmic composition uniaxially elongated by 50% is 50 times or less the volume resistivity ? for the non-ohmic composition not elongated.Type: ApplicationFiled: October 8, 2019Publication date: March 3, 2022Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Shuhei YASUDA, Takanori YAMAZAKI, Shinya NISHIKAWA
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Publication number: 20220026497Abstract: A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials. The equivalent circuit model is a model including a diffusion resistance component for each of the plurality of materials for use in the positive electrode and the negative electrode.Type: ApplicationFiled: November 13, 2019Publication date: January 27, 2022Inventors: SHINYA NISHIKAWA, TAKASHI IIDA, TOHRU WATANABE
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Publication number: 20220026498Abstract: A voltage of a battery cell is measured, and a current flowing through the battery cell is measured. An open circuit voltage (OCV) of the battery cell is estimated based on the measured voltage, the measured current, and an equivalent circuit model based on electrochemistry of the battery cell, and a state of charge (SOC) of the battery cell is estimated based on the estimated OCV, SOC-OCV characteristics on a charge side of the battery cell, and SOC-OCV characteristics on a discharge side of the battery cell. At least one of a positive electrode and negative electrode of the battery cell is a mixed electrode containing a plurality of materials.Type: ApplicationFiled: November 13, 2019Publication date: January 27, 2022Inventors: SHINYA NISHIKAWA, TOHRU WATANABE, TAKASHI IIDA
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Publication number: 20210376500Abstract: A terminal-attached electric wire includes: an insulated electric wire which includes a core wire and an insulating material covering the periphery of the core wire; a terminal fitting electrically connected to the core wire at the end of the insulated electric wire; and an adhesive tube covering the end of the insulating material. The terminal-attached electric wire includes a molding portion formed to cover a region extending from a core wire-connected portion of the terminal fitting which is connected to the core wire to a middle portion in an axial direction of the adhesive tube. The outer peripheral surface of the adhesive tube is adhered to the inner peripheral surface of the molding portion. The inner peripheral surface of the adhesive tube is adhered to the outer peripheral surface of the insulating material.Type: ApplicationFiled: November 9, 2018Publication date: December 2, 2021Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Mitsuru HIROSE, Koji FUKUMOTO, Daisuke HASHIMOTO, Tetsuya NAKAMURA, Kazuo NAKASHIMA, Shigeyuki TANAKA, Taro FUJITA, Shinya NISHIKAWA
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Publication number: 20210318386Abstract: Provided is a controller configured: to calculate, among voltages detected from a plurality of cells, a voltage difference between the voltage detected from one cell of the plurality of cells, the one cell to be detected, and a representative voltage at each of a first time and a second time, the representative voltage based on the voltage detected from at least one cell of the plurality of cells, the at least one cell to be compared; and when a discrepancy between the voltage difference at the first time and the voltage difference at the second time is equal to or more than a threshold, to determine that an abnormality has occurred in the one cell to be detected.Type: ApplicationFiled: June 12, 2019Publication date: October 14, 2021Inventors: YUSUKE ITAKURA, CHANGHUI YANG, SHINYA NISHIKAWA, TOHRU WATANABE
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Publication number: 20210296911Abstract: A controller executes an equalization process of equalizing capacities of a plurality of cells, and a cell abnormality determination process of, of detected voltages of the plurality of cells, calculating a voltage difference between a representative voltage based on the detected voltage of at least one cell to be compared and the detected voltage of one cell to be detected at a first time and a second time, and when a difference between the two voltage differences is greater than or equal to a threshold value, determining that the cell to be detected is abnormal. In the case of executing the cell abnormality determination process during the equalization process, the controller provides the detected voltage of a target cell to be subjected to the equalization process with a compensation value corresponding to a voltage change based on energy transfer in the target cell due to the equalization process between the first time and the second time, and calculates the voltage difference at the second time.Type: ApplicationFiled: June 12, 2019Publication date: September 23, 2021Inventors: YUSUKE ITAKURA, CHANGHUI YANG, SHINYA NISHIKAWA, TOHRU WATANABE
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Patent number: 11114215Abstract: An object of the present disclosure is to provide a core electric wire for a multi-core cable that is superior in flex resistance at low temperature, and a multi-core cable employing the same. A core electric wire for a multi-core cable according to an aspect of the present disclosure comprises a conductor obtained by twisting element wires, and an insulating layer covering the conductor, wherein a linear expansion coefficient C of the insulating layer at from 25° C. to ?35° C. is no less than 1×10?5 K?1 and no greater than 2.5×10?4 K?1.Type: GrantFiled: January 29, 2019Date of Patent: September 7, 2021Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Shigeyuki Tanaka, Shinya Nishikawa, Hiroyuki Okawa, Takaya Kohori, Yuhei Mayama, Takayuki Hirai
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Publication number: 20210265856Abstract: A voltage measurer measures a voltage of a battery cell. A controller controls charging-discharging of the battery cell. The controller performs control to apply a reverse current for canceling a polarization voltage of the battery cell through the battery cell after the completion of charging-discharging of the battery cell. For example, after the charging-discharging of the battery cell completes, the controller sets a current command value, in a power converter, that instructs flow of a reverse current of a preset value for a preset time.Type: ApplicationFiled: February 13, 2019Publication date: August 26, 2021Inventors: SHINYA NISHIKAWA, TOHRU WATANABE, TAKASHI IIDA
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Patent number: 11081744Abstract: A temperature detector detects a temperature of an electricity storage unit installed in a casing. A controller estimates a temperature outside the casing on the basis of a detection temperature of the electricity storage unit detected by the temperature detector. The controller estimates an outdoor air temperature outside the casing on the basis of a change amount of detection temperature per a predetermined period detected in a state where a cooling unit is operated and a change amount of detection temperature per the predetermined period detected in a state where the cooling unit is stopped.Type: GrantFiled: May 16, 2017Date of Patent: August 3, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Shinya Nishikawa, Takashi Hasegawa, Keisuke Naito
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Patent number: 11043821Abstract: In a power storage system, a management device calculates a state of power (SOP) of a whole of a plurality of power storage blocks connected in parallel based on an SOP of each of the plurality of power storage blocks. At least one of the plurality of power storage blocks is disconnected from the power storage system, and when at least one switch is turned on to return at least one disconnected power storage block to the power storage system having the parallel-connected power storage blocks, the management device calculates an SOP of a whole of the power storage blocks after a return of the at least one power storage block based on a deviation in current between each of the power storage blocks including the at least one returned power storage block to determine an upper limit level of power or current flowing into a power converter.Type: GrantFiled: April 26, 2018Date of Patent: June 22, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Shinya Nishikawa, Kazufumi Nishikawa, Tohru Watanabe
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Patent number: 10964452Abstract: Provided are a core electric wire for multi-core cable that is superior in flex resistance at low temperature, and a multi-core cable employing the same. A core electric wire for multi-core cable according to an aspect of the present invention comprises a conductor obtained by twisting element wires, and an insulating layer that covers an outer periphery of the conductor, in which, in a transverse cross section of the conductor, a percentage of an area occupied by void regions among the element wires is from 5% to 20%. An average area of the conductor in the transverse cross section is preferably from 1.0 mm2 to 3.0 mm2. An average diameter of the element wires in the conductor is preferably from 40 ?m to 100 ?m, and the number of the element wires is preferably from 196 to 2,450. The conductor is preferably obtained by twisting stranded element wires obtained by twisting subsets of element wires.Type: GrantFiled: April 30, 2020Date of Patent: March 30, 2021Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Shigeyuki Tanaka, Shinya Nishikawa, Hiroyuki Okawa, Takaya Kohori, Yuhei Mayama, Takayuki Hirai
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Patent number: 10920051Abstract: The present invention is a resin composition including: a resin component; zinc oxide; and an acetic acid remover, wherein the resin component includes an ethylene-vinylacetate copolymer and a content of the ethylene-vinylacetate copolymer in the resin component is greater than or equal to 10% by mass, wherein the acetic acid remover is an acid acceptor, a nitrogen-containing aromatic heterocyclic compound having a mercapto group, or a combination thereof, and wherein a mass ratio of the zinc oxide to the ethylene-vinylacetate copolymer is greater than or equal to 0.06 and less than or equal to 0.20.Type: GrantFiled: December 22, 2017Date of Patent: February 16, 2021Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Shigeyuki Tanaka, Taro Fujita, Shinya Nishikawa, Takaya Kohori, Motoi Matsuda, Hiroyuki Okawa
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Publication number: 20200403420Abstract: A voltage detector detects a voltage of each of a plurality of cells that are series-connected. A plurality of discharge circuits are respectively parallel-connected to the plurality of cells. A controller performs control to equalize voltages or capacities of the plurality of cells to a target value by controlling discharge time of the plurality of discharge circuits, based on the voltages of the plurality of cells detected by the voltage detector. The controller sets the target value higher as an amount of change in the voltages of the plurality of cells in a predetermined period is larger.Type: ApplicationFiled: February 8, 2019Publication date: December 24, 2020Inventors: RYOSUKE NAGASE, SHINYA NISHIKAWA, TAKASHI IIDA
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Publication number: 20200365957Abstract: A temperature detector detects a temperature of an electricity storage unit installed in a casing. A controller estimates a temperature outside the casing on the basis of a detection temperature of the electricity storage unit detected by the temperature detector. The controller estimates an outdoor air temperature outside the casing on the basis of a change amount of detection temperature per a predetermined period detected in a state where a cooling unit is operated and a change amount of detection temperature per the predetermined period detected in a state where the cooling unit is stopped.Type: ApplicationFiled: May 16, 2017Publication date: November 19, 2020Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Shinya Nishikawa, Takashi Hasegawa, Keisuke Naito
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Patent number: 10840690Abstract: A tubular cable interconnect unit arranged on an outer periphery of a joint of a power cable, includes a tubular insulating tube, a non-ohmic resistor layer formed from a non-ohmic composition and provided on an inner peripheral surface of the insulating tube, and an inner semiconductive layer provided on the non-ohmic resistor layer, wherein the non-ohmic composition includes a base polymer including at least one of thermoplastic and rubber, and varistor grains having a non-ohmic characteristic in which a volume resistivity varies non-linearly with respect to an applied voltage, and the varistor grains have a maximum grain diameter of 30 ?m or less.Type: GrantFiled: June 11, 2018Date of Patent: November 17, 2020Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Shuhei Yasuda, Takanori Yamazaki, Yoshiyuki Inoue, Ryota Fukumoto, Yoitsu Sekiguchi, Shoshi Katakai, Shinya Nishikawa, Hiroshi Hayami
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Patent number: 10811889Abstract: A smoothing unit smoothes a detected voltage of each power storage block based on previous data during a certain period. A calculator calculates a difference between a smoothing voltage of one power storage block in the n power storage blocks and a representative value of the smoothing voltages of the other power storage blocks or all the power storage blocks. A determination unit determines a power storage block whose difference against the representative value enlarges more than or equal to a set value during a predetermined period as a power storage block containing an abnormal power storage cell.Type: GrantFiled: February 13, 2019Date of Patent: October 20, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Shinya Nishikawa, Yusuke Itakura, Takashi Iida
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Patent number: 10804009Abstract: A twinax cable 100 includes a twinax structure, the twinax structure including: a signal wire pair, the signal wire pair including a pair of signal wires formed of a first signal wire and a second signal wire, and an insulating layer configured to cover the pair of signal wires; a drain wire; and a shield tape arranged on the outer circumferential side of the insulating layer to cover the signal wire pair and the drain wire. The insulating layer is mainly composed of polyethylene. The insulating layer includes not less than 30 ppm and not more than 4000 ppm of a hindered phenol-based antioxidant. A dielectric tangent tan ? of the insulating layer at the time of application of a high-frequency electric field having a frequency of 10 GHz is not more than 3.0×10?4.Type: GrantFiled: June 20, 2018Date of Patent: October 13, 2020Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Nayu Yanagawa, Shinya Nishikawa, Taro Fujita, Yuto Kobayashi, Masaki Hayakawa, Atsushi Tsujino, Yuji Ochi
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Publication number: 20200303929Abstract: The power conditioner determines possible total power and working individual power to be in a range that possible individual power of each of the power supply units is not exceeded. The possible total power is determined from the possible individual power, of each of the power supply units, determined based on the battery information detected by each of the unit controllers, collected by a master controller from each of the unit controllers. The working individual power is determined based on a power deviation indicating a difference of charging and discharging power between the power supply units. The power conditioner causes charging and discharging of each of the power supply units within the calculated working individual power.Type: ApplicationFiled: March 10, 2017Publication date: September 24, 2020Applicants: SANYO Electric Co., Ltd., Panasonic CorporationInventors: Tohru Watanabe, Takashi Iida, Shinya Nishikawa, Kazufumi Nishikawa, Shigeyuki Yamakita