Patents by Inventor Toshiyuki Kawai
Toshiyuki Kawai 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: 20240112571Abstract: A congestion prediction device, a congestion prediction method, and a storage medium are provided. A mapping outputs an output variable when input variables are input to the mapping. The output variable indicates a degree of congestion in a predetermined specific area. The mapping is learned in advance by machine learning. The input variables include congestion variables. Each of the congestion variables indicates a degree of congestion in the specific area at regular time intervals within a specific period. The output variable indicates a degree of congestion after a lapse of the regular time interval from an end time of the specific period.Type: ApplicationFiled: September 26, 2023Publication date: April 4, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ayumu SHIOMI, Atsushi MIYAGAWA, Hiroki TAKEUCHI, Toshiyuki KAWAI, Ryosuke FUKAYA, Hiroyuki TOKITA, Yusuke IKENOUE, Tsukasa KATO, Katsuhisa YOSHIKAWA, Yuta ICHIJYO, Takayuki AKAISHI, Shintaro KAWAI
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Publication number: 20230222900Abstract: A method includes, by a processor, acquiring number of persons information that indicates a number of users, including users who ride in vehicles, who depart from a facility at each of a predetermined time period, weather information for each predetermined time period, and vehicle information relating to vehicles traveling in a periphery of the facility, determining traffic jam status that indicates absence/presence of a traffic jam on a road located in a vicinity of the facility in the predetermined time period, by using the vehicle information; and generating a learned model for predicting a traffic jam of a road by machine learning using, as teaching data, the number of persons information, the weather information, and the traffic jam status that is associated with the number of persons information and the weather information.Type: ApplicationFiled: November 29, 2022Publication date: July 13, 2023Inventors: Ayumu SHIOMI, Atsushi MIYAGAWA, Hiroki TAKEUCHI, Toshiyuki KAWAI, Ryosuke FUKAYA, Hiroyuki TOKITA, Yusuke IKENOUE, Naoyuki SAKA, Tsukasa KATO, Katsuhisa YOSHIKAWA, Shugen YAMAMURA, Takayuki AKAISHI
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Patent number: 11437648Abstract: Provided is a nonaqueous electrolyte solution to which lithium tetraborate is added, for a lithium secondary battery, the nonaqueous electrolyte solution being capable of reducing the resistance of a lithium secondary battery. A nonaqueous electrolyte solution for a lithium secondary battery disclosed herein contains lithium tetraborate as a first additive, and a difluorophosphate salt as a second additive.Type: GrantFiled: January 17, 2020Date of Patent: September 6, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshiyuki Kawai, Hiroto Asano
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Patent number: 11043699Abstract: The present disclosure provides a nonaqueous electrolyte solution that is used in a nonaqueous electrolyte secondary battery. The nonaqueous electrolyte solution contains a fluorinated solvent, a predetermined additive A and a predetermined additive B. A ratio (CA/CB) of concentration CA (mol/L) of the additive A and concentration CB (mol/L) of the additive B lies in a range of 1 to 30.Type: GrantFiled: January 30, 2018Date of Patent: June 22, 2021Assignees: Toyota Jidosha Kabushiki Kaisha, Daikin Industries, Ltd.Inventors: Toshiyuki Kawai, Hiroto Asano, Shigeaki Yamazaki, Shinichi Kinoshita
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Patent number: 10950896Abstract: A nonaqueous electrolyte solution used for a nonaqueous electrolyte secondary battery includes a cyclic carbonate and a fluorinated carboxylate ester including two fluorine atoms on an alpha carbon atom derived from a carboxylic acid as a nonaqueous solvent.Type: GrantFiled: December 7, 2017Date of Patent: March 16, 2021Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DAIKIN INDUSTRIES, LTD.Inventors: Hiroto Asano, Toshiyuki Kawai, Shinpei Kondo, Shigeaki Yamazaki, Shinichi Kinoshita
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Patent number: 10923764Abstract: The present invention provides an electrolyte solution in which a decrease in capacity retention is suppressed and an increase in gas production is suppressed even when stored at high temperatures. Provided is an electrolyte solution containing: a compound (1) represented by formula (1): CF3CFX11COOR11, wherein X11 is a hydrogen atom, a fluorine atom, or a C1-C3 alkyl group in which hydrogen atoms are optionally replaced by fluorine atoms, and R11 is a C1-C3 alkyl group in which hydrogen atoms are optionally replaced by fluorine atoms; a fluorinated carbonate; and a cyclic acid anhydride.Type: GrantFiled: December 14, 2017Date of Patent: February 16, 2021Assignees: DAIKIN INDUSTRIES, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shigeaki Yamazaki, Shinichi Kinoshita, Hiroto Asano, Toshiyuki Kawai
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Patent number: 10890625Abstract: A battery model includes a series connection of a direct current resistance model, a charge transfer resistance model derived from the Butler-Volmer equation, and a diffusion resistance model. A battery state estimating device includes a storage unit and a parameter calculating unit. The storage unit stores information on the resistance parameter related to the resistance component of the diffusion resistance model, the time constant parameter related to the time constant of the diffusion resistance model, and the charge parameter of the charge transfer resistance model, in association with temperature information of the secondary battery. The parameter calculating unit calculates each of the parameters corresponding to the detected temperature value based on a detected temperature value of the secondary battery and the information stored in the storage unit.Type: GrantFiled: January 20, 2017Date of Patent: January 12, 2021Assignee: DENSO CORPORATIONInventors: Toshiyuki Kawai, Keiichi Kato, Yuji Koike, Hideaki Tanaka, Shuntaro Kono
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Patent number: 10818972Abstract: Provided is an electrolyte solution for a lithium secondary battery, which can lower the resistance of a lithium secondary battery and impart the lithium secondary battery with high cycle characteristics. The electrolyte solution for a lithium secondary battery disclosed here includes an electrolyte salt consisting essentially of a lithium imide salt, a solvent containing methyl difluoroacetate, and an unsaturated carboxylic acid anhydride compound represented by formula (1) below as an additive (in the formula, R1 and R2 each independently denote a hydrogen atom, a fluorine atom, or an alkyl group that may be fluorine-substituted, or R1 and R2 bond to each other to form a ring structure).Type: GrantFiled: October 18, 2018Date of Patent: October 27, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshiyuki Kawai, Hiroto Asano
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Patent number: 10784537Abstract: Provided is a lithium ion secondary battery with reduced battery resistance, this lithium ion secondary battery using a positive electrode active material with a high potential and a phosphate-based solid electrolyte. The lithium ion secondary battery disclosed herein includes a positive electrode, a negative electrode, and a nonaqueous electrolytic solution. The positive electrode has a positive electrode active material layer including a positive electrode active material having an operation upper limit potential of at least 4.6 V relative to metallic lithium and a phosphate-based solid electrolyte. The nonaqueous electrolytic solution includes a boric acid ester including a fluorine atom.Type: GrantFiled: December 22, 2017Date of Patent: September 22, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Toshiyuki Kawai
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Publication number: 20200243908Abstract: Provided is a nonaqueous electrolyte solution to which lithium tetraborate is added, for a lithium secondary battery, the nonaqueous electrolyte solution being capable of reducing the resistance of a lithium secondary battery. A nonaqueous electrolyte solution for a lithium secondary battery disclosed herein contains lithium tetraborate as a first additive, and a difluorophosphate salt as a second additive.Type: ApplicationFiled: January 17, 2020Publication date: July 30, 2020Inventors: Toshiyuki Kawai, Hiroto Asano
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Patent number: 10663524Abstract: A battery state estimating apparatus includes an updating unit. The updating unit updates a charge-transfer impedance model in a battery model of a secondary battery, which is a series connection of a DC resistance model, a charge-transfer impedance model, and an diffusion impedance model, using the amount of change in a measurement value of a current flowing through the secondary such that a first relationship between the current flowing through the secondary battery and a voltage across the charge-transfer resistance approaches a second relationship between an actual value of the current and an actual value of the voltage across the charge-transfer resistance. The first relationship between the current flowing through the secondary battery and the voltage across the charge-transfer resistance is defined based on the Butler-Volmer equation. A state estimator estimates a state of the secondary battery based on the battery model including the updated charge-transfer impedance model.Type: GrantFiled: March 7, 2016Date of Patent: May 26, 2020Assignee: DENSO CORPORATIONInventors: Toshiyuki Kawai, Keiichi Kato, Yuuji Koike
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Patent number: 10527677Abstract: A battery state estimation apparatus estimates a state of a secondary battery based on a battery model thereof. The battery model includes a DC resistance model, a reaction resistance model, and a diffusion resistance model. The apparatus includes a DC information storage section which stores information on the DC resistance related to temperature of the secondary battery, a reaction information storage section which stores information on the reaction resistance parameter related to the temperature, a diffusion information storage section which stores information on each of the first and second parameters related to the temperature, and a state estimation section which calculates the DC resistance, the reaction resistance parameter, and the first and second parameters from the stored information, by using the temperature as input, and estimates the state of the secondary battery based on the DC resistance, reaction resistance parameter, and first and second parameters.Type: GrantFiled: October 9, 2015Date of Patent: January 7, 2020Assignee: DENSO CORPORATIONInventors: Toshiyuki Kawai, Keiichi Kato, Yuuji Koike
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Publication number: 20190123387Abstract: Provided is an electrolyte solution for a lithium secondary battery, which can lower the resistance of a lithium secondary battery and impart the lithium secondary battery with high cycle characteristics. The electrolyte solution for a lithium secondary battery disclosed here includes an electrolyte salt consisting essentially of a lithium imide salt, a solvent containing methyl difluoroacetate, and an unsaturated carboxylic acid anhydride compound represented by formula (1) below as an additive (in the formula, R1 and R2 each independently denote a hydrogen atom, a fluorine atom, or an alkyl group that may be fluorine-substituted, or R1 and R2 bond to each other to form a ring structure).Type: ApplicationFiled: October 18, 2018Publication date: April 25, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshiyuki KAWAI, Hiroto ASANO
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Patent number: 10224570Abstract: The invention provides a lithium ion secondary battery which exhibits excellent output characteristics and in which decline in the power characteristics is suppressed for a long period of time even after charge-discharge cycling. The lithium ion secondary battery includes a positive electrode, a negative electrode and a nonaqueous electrolyte solution. The positive electrode has a maximum achievable potential of 4.5 V or more versus metallic lithium. The nonaqueous electrolyte solution includes (A) a nonfluorinated cyclic carbonate, (B) a fluorinated cyclic carbonate, and (C) a fluorinated acyclic carbonate. The nonfluorinated cyclic carbonate (A) accounts for more than 10% by volume of (A), (B) and (C) combined.Type: GrantFiled: March 28, 2014Date of Patent: March 5, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Abe, Toshiyuki Kawai, Akira Kouyama
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Publication number: 20190064276Abstract: A battery model includes a series connection of a direct current resistance model, a charge transfer resistance model derived from the Butler-Volmer equation, and a diffusion resistance model. A battery state estimating device includes a storage unit and a parameter calculating unit. The storage unit stores information on the resistance parameter related to the resistance component of the diffusion resistance model, the time constant parameter related to the time constant of the diffusion resistance model, and the charge parameter of the charge transfer resistance model, in association with temperature information of the secondary battery. The parameter calculating unit calculates each of the parameters corresponding to the detected temperature value based on a detected temperature value of the secondary battery and the information stored in the storage unit.Type: ApplicationFiled: January 20, 2017Publication date: February 28, 2019Applicant: DENSO CORPORATIONInventors: Toshiyuki KAWAI, Keiichi KATO, Yuji KOIKE, Hideaki TANAKA, Shuntaro KONO
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Patent number: 10094882Abstract: In an apparatus, a circuit model includes a DC resistance model, and a reaction impedance model having a nonlinear relationship between a first potential difference across a reaction resistance and a current flowing through the secondary battery. The nonlinearly relationship depends on a temperature of the secondary battery. The circuit model includes a diffusion impedance model. The apparatus predicts a future remaining voltage across the secondary battery at a future timing when a predetermined duration will have elapsed since a prediction time. The apparatus calculates a future polarization voltage across the secondary battery at the future timing. The apparatus predicts a target power parameter of the secondary battery at the future timing according to the future remaining voltage, the future polarization voltage, a first potential difference across the reaction resistance, and a second potential difference across the DC resistance model.Type: GrantFiled: December 28, 2015Date of Patent: October 9, 2018Assignee: DENSO CORPORATIONInventors: Toshiyuki Kawai, Yuuji Koike, Keiichi Kato
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Publication number: 20180219259Abstract: The present disclosure provides a nonaqueous electrolyte solution that is used in a nonaqueous electrolyte secondary battery. The nonaqueous electrolyte solution contains a fluorinated solvent, a predetermined additive A and a predetermined additive B. A ratio (CA/CB) of concentration CA (mol/L) of the additive A and concentration CB (mol/L) of the additive B lies in a range of 1 to 30.Type: ApplicationFiled: January 30, 2018Publication date: August 2, 2018Applicants: Toyota Jidosha Kabushiki Kaisha, Daikin Industries, Ltd.Inventors: Toshiyuki Kawai, Hiroto Asano, Shigeaki Yamazaki, Shinichi Kinoshita
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Publication number: 20180183105Abstract: A nonaqueous electrolyte solution used for a nonaqueous electrolyte secondary battery includes a cyclic carbonate and a fluorinated carboxylate ester including two fluorine atoms on an alpha carbon atom derived from a carboxylic acid as a nonaqueous solvent.Type: ApplicationFiled: December 7, 2017Publication date: June 28, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Daikin Industries, Ltd.Inventors: Hiroto ASANO, Toshiyuki KAWAI, Shinpei KONDO, Shigeaki YAMAZAKI, Shinichi KINOSHITA
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Publication number: 20180183097Abstract: The present invention provides an electrolyte solution in which a decrease in capacity retention is suppressed and an increase in gas production is suppressed even when stored at high temperatures. Provided is an electrolyte solution containing: a compound (1) represented by formula (1): CF3CFX11COOR11, wherein X11 is a hydrogen atom, a fluorine atom, or a C1-C3 alkyl group in which hydrogen atoms are optionally replaced by fluorine atoms, and R11 is a C1-C3 alkyl group in which hydrogen atoms are optionally replaced by fluorine atoms; a fluorinated carbonate; and a cyclic acid anhydride.Type: ApplicationFiled: December 14, 2017Publication date: June 28, 2018Applicants: DAIKIN INDUSTRIES, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shigeaki YAMAZAKI, Shinichi KINOSHITA, Hiroto ASANO, Toshiyuki KAWAI
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Publication number: 20180183103Abstract: Provided is a lithium ion secondary battery with reduced battery resistance, this lithium ion secondary battery using a positive electrode active material with a high potential and a phosphate-based solid electrolyte. The lithium ion secondary battery disclosed herein includes a positive electrode, a negative electrode, and a nonaqueous electrolytic solution. The positive electrode has a positive electrode active material layer including a positive electrode active material having an operation upper limit potential of at least 4.6 V relative to metallic lithium and a phosphate-based solid electrolyte. The nonaqueous electrolytic solution includes a boric acid ester including a fluorine atom.Type: ApplicationFiled: December 22, 2017Publication date: June 28, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Toshiyuki KAWAI