Patents by Inventor Kenji Hosaka
Kenji Hosaka 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: 11022653Abstract: A deterioration degree estimation device includes an internal resistance detection unit, a deterioration management unit and a deterioration degree estimation unit. The internal resistance detection unit detects an internal resistance of a battery. The deterioration management unit manages a cycle deterioration of the battery. The deterioration degree estimation unit estimates a deterioration degree of the battery as an estimated deterioration degree based on an increase rate of the internal resistance. The deterioration degree estimation unit estimates the estimated deterioration degree such that the estimated deterioration degree decreases as the cycle deterioration increases, or such that the estimated deterioration degree increases as the cycle deterioration degree decreases.Type: GrantFiled: August 26, 2015Date of Patent: June 1, 2021Assignee: Nissan Motor Co., Ltd.Inventors: Hironobu Shimosawa, Kenichi Sakai, Kenji Hosaka, Tomoyuki Shiratsuchi
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Patent number: 10286789Abstract: A secondary battery charger system in which a chargeable power is calculated on the basis of a difference between a charging target voltage and a cell voltage using a charging control unit that controls a charger used to charge a secondary battery, the secondary battery charger system including a charging threshold voltage setting unit configured to set the charging target voltage to be lower than a charging limitation voltage which is an upper limitation of the cell voltage allowable in design. The charging control unit stops the charging if a predetermined charging stop condition is satisfied while the cell voltage exceeds the charging target voltage and is lower than the charging limitation voltage.Type: GrantFiled: August 29, 2014Date of Patent: May 14, 2019Assignee: Nissan Motor Co., Ltd.Inventors: Hayato Nagakura, Kenichi Sakai, Kenji Hosaka, Kazuma Tamai, Hiroto Okabe
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Patent number: 10261136Abstract: A battery degradation degree estimation device includes a total degradation degree detection unit configured to detect a present total degradation degree of a battery, a cycle degradation estimation unit configured to estimate a future cycle degradation degree due to charge/discharge of the battery, a storage degradation estimation unit configured to estimate a future storage degradation degree over time inside the battery, and a battery degradation estimation unit configured to estimate a future battery degradation degree on the basis of the present total degradation degree, the future cycle degradation degree and the future storage degradation degree.Type: GrantFiled: May 28, 2015Date of Patent: April 16, 2019Assignee: Nissan Motor Co., Ltd.Inventors: Kenji Hosaka, Kazuma Tamai, Chizuru Matsuyama, Kenichi Sakai
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Patent number: 10177387Abstract: Provided is a bipolar battery current collector that includes a conductive resin layer formed in such a manner as to, when at least part of the conductive resin layer reaches a predetermined temperature, interrupts a flow of electric current through the at least part of the conductive resin layer in a vertical direction thereof. Also provided is a bipolar battery using the current collector. It is possible by the use of the current collector to suppress local heat generation in the bipolar battery and improve the durability of the bipolar battery.Type: GrantFiled: October 12, 2015Date of Patent: January 8, 2019Assignee: NISSAN MOTOR CO., LTD.Inventors: Kazuki Miyatake, Kenji Hosaka, Yoshio Shimoida, Hideaki Horie
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Publication number: 20180246174Abstract: A deterioration degree estimation device includes an internal resistance detection unit, a deterioration management unit and a deterioration degree estimation unit. The internal resistance detection unit detects an internal resistance of a battery. The deterioration management unit manages a cycle deterioration of the battery. The deterioration degree estimation unit estimates a deterioration degree of the battery as an estimated deterioration degree based on an increase rate of the internal resistance. The deterioration degree estimation unit estimates the estimated deterioration degree such that the estimated deterioration degree decreases as the cycle deterioration increases, or such that the estimated deterioration degree increases as the cycle deterioration degree decreases.Type: ApplicationFiled: August 26, 2015Publication date: August 30, 2018Inventors: Hironobu SHIMOSAWA, Kenichi SAKAI, Kenji HOSAKA, Tomoyuki SHIRATSUCHI
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Patent number: 10001528Abstract: A battery deterioration degree estimating apparatus includes a storage deterioration degree estimator that estimates the storage deterioration degree of the battery in reuse based on the storage deterioration degree of the battery in the in-vehicle period and the load information of the battery in reuse, the cycle deterioration degree estimator that estimates the cycle deterioration degree of the battery in reuse on the basis of the load information of the battery in reuse, and the total-deterioration-degree at secondary-use-start calculator that calculates the total deterioration degree of the battery at the time point of reuse start. The battery deterioration degree estimating apparatus includes the total-deterioration-degree detector that estimates the total deterioration degree of the battery after the reuse start on the basis of the storage deterioration degree in reuse, the cycle deterioration degree in reuse, and the total deterioration degree of the battery at the time point of the reuse start.Type: GrantFiled: May 29, 2015Date of Patent: June 19, 2018Assignee: Nissan Motor Co., Ltd.Inventors: Chizuru Matsuyama, Kenji Hosaka
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Publication number: 20180156873Abstract: A battery deterioration degree estimating apparatus includes a storage deterioration degree estimator that estimates the storage deterioration degree of the battery in reuse based on the storage deterioration degree of the battery in the in-vehicle period and the load information of the battery in reuse, the cycle deterioration degree estimator that estimates the cycle deterioration degree of the battery in reuse on the basis of the load information of the battery in reuse, and the total-deterioration-degree at secondary-use-start calculator that calculates the total deterioration degree of the battery at the time point of reuse start. The battery deterioration degree estimating apparatus includes the total-deterioration-degree detector that estimates the total deterioration degree of the battery after the reuse start on the basis of the storage deterioration degree in reuse, the cycle deterioration degree in reuse, and the total deterioration degree of the battery at the time point of the reuse start.Type: ApplicationFiled: May 29, 2015Publication date: June 7, 2018Inventors: Chizuru Matsuyama, Kenji Hosaka
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Patent number: 9929581Abstract: A charge control device that charges a battery to a predetermined charging rate using an output power from a charger includes a charger control means that controls the output power of the charger based on a first map indicative of the relationship of the charge power with respect to the state of the battery and the charge time of the battery, and an allowable charge time calculation means that calculates the allowable charge time of the battery charge time. The charge control device refers to the first map for calculating the charge power with which to charge the battery in the allowable charge time, and controls the output power of the charger according to the charge power calculated based on the allowable charge time.Type: GrantFiled: September 10, 2013Date of Patent: March 27, 2018Assignee: Nissan Motor Co., Ltd.Inventors: Atsushi Takano, Kenji Hosaka
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Publication number: 20170274784Abstract: A secondary battery charger system in which a chargeable power capacity is calculated on the basis of a difference between a charging target voltage and a cell voltage using a charging control unit that controls a charger used to charge a secondary battery, the secondary battery charger system including a charging threshold voltage setting unit configured to set the charging target voltage to be lower than a charging limitation voltage which is an upper limitation of the cell voltage allowable in design. The charging control unit stops the charging if a predetermined charging stop condition is satisfied while the cell voltage exceeds the charging target voltage and is lower than the charging limitation voltage.Type: ApplicationFiled: August 29, 2014Publication date: September 28, 2017Inventors: Hayato Nagakura, Kenichi Sakai, Kenji Hosaka, Kazuma Tamai, Hiroto Okabe
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Patent number: 9666858Abstract: A negative electrode for a secondary battery according to the present invention has a collector and a negative electrode active material layer formed on a surface of the collector and containing negative electrode active material particles. In the negative electrode active material layer, an insulating material is arranged between the negative electrode active material particles so as not to develop conductivity by a percolation path throughout the negative electrode active material layer. It is possible in this configuration to effectively prevent the occurrence of a short-circuit current due to an internal short circuit and the generation of heat due to such short-circuit current flow in the secondary battery while securing the battery performance of the secondary battery.Type: GrantFiled: May 25, 2011Date of Patent: May 30, 2017Assignee: NISSAN MOTOR CO., LTD.Inventors: Kenji Ohara, Sohei Suga, Yasuo Ohta, Tomoya Kubota, Kazuyuki Sakamoto, Takaaki Abe, Satoru Ichikawa, Kenji Hosaka, Kosuke Hagiyama, Hiroshi Miyakubo
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Publication number: 20170131364Abstract: A battery degradation degree estimation device includes a total degradation degree detection unit configured to detect a present total degradation degree of a battery, a cycle degradation estimation unit configured to estimate a future cycle degradation degree due to charge/discharge of the battery, a storage degradation estimation unit configured to estimate a future storage degradation degree over time inside the battery, and a battery degradation estimation unit configured to estimate a future battery degradation degree on the basis of the present total degradation degree, the future cycle degradation degree and the future storage degradation degree.Type: ApplicationFiled: May 28, 2015Publication date: May 11, 2017Inventors: Kenji HOSAKA, Kazuma TAMAI, Chizuru MATSUYAMA, Kenichi SAKAI
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Patent number: 9450266Abstract: A battery main body housed in a case comprises one laminated body composed of a plurality of bipolar electrodes laminated with an electrolyte layer therebetween or comprises a plurality of laminated bodies connected in series. A positive electrode current collecting plate and a negative electrode current collecting plate each having one surface joined to the inner peripheral surface of the case and the other surface joined to one end of the battery main body respectively extend to the outside of the case. By providing a cutoff mechanism for cutting off an electrical connection between the positive electrode current collecting plate and the negative electrode current collecting plate via the battery main body according to an expansion deformation of the case, a current path in a bipolar secondary battery is interrupted when the short-circuit current occurs, thereby protecting the bipolar secondary battery from a short-circuit current.Type: GrantFiled: May 17, 2011Date of Patent: September 20, 2016Assignee: NISSAN MOTOR CO., LTD.Inventors: Kenji Hosaka, Shiho Inoue, Masaaki Suzuki, Kazuki Miyatake
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Patent number: 9299973Abstract: A battery module 11 is structured to include a flat-type battery 40 in which current can be taken out from both faces of an electric generation element 20 in a layered direction, flat-plate-type electrode tabs 50 and 60 having a face contact with a current-taking-out plane of the flat-type battery to take out current, and a packaging case 100 covering the flat-type battery and the electrode tab. The inner face of the packaging case and the electrode tab have therebetween an elastic member 120.Type: GrantFiled: February 9, 2007Date of Patent: March 29, 2016Assignee: NISSAN MOTOR CO., LTD.Inventors: Takuya Kinoshita, Hideaki Horie, Osamu Shimamura, Kenji Hosaka, Takaaki Abe
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Publication number: 20160043405Abstract: Provided is a bipolar battery current collector that includes a conductive resin layer formed in such a manner as to, when at least part of the conductive resin layer reaches a predetermined temperature, interrupts a flow of electric current through the at least part of the conductive resin layer in a vertical direction thereof. Also provided is a bipolar battery using the current collector. It is possible by the use of the current collector to suppress local heat generation in the bipolar battery and improve the durability of the bipolar battery.Type: ApplicationFiled: October 12, 2015Publication date: February 11, 2016Applicant: NISSAN MOTOR CO., LTD.Inventors: Kazuki MIYATAKE, Kenji HOSAKA, Yoshio SHIMOIDA, Hideaki HORIE
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Publication number: 20150236524Abstract: A charge control device that charges a battery to a predetermined charging rate using an output power from a charger includes a charger control means that controls the output power of the charger based on a first map indicative of the relationship of the charge power with respect to the state of the battery and the charge time of the battery, and an allowable charge time calculation means that calculates the allowable charge time of the battery charge time. The charge control device refers to the first map for calculating the charge power with which to charge the battery in the allowable charge time, and controls the output power of the charger according to the charge power calculated based on the allowable charge time.Type: ApplicationFiled: September 10, 2013Publication date: August 20, 2015Inventors: Atsushi Takano, Kenji Hosaka
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Patent number: 9017877Abstract: A current collector for a nonaqueous solvent secondary battery, which includes: a first metal layer; and a second metal layer stacked on a surface of the first metal layer, is composed so that a Young's modulus (E1), Vickers hardness (Hv1) and thickness (T1) of the first metal layer and a Young's modulus (E2), Vickers hardness (Hv2) and thickness (T2) of the second metal layer can satisfy the following Expression: (E1>E2 or Hv1>Hv2); and T1<T2.Type: GrantFiled: May 23, 2008Date of Patent: April 28, 2015Assignee: Nissan Motor Co., Ltd.Inventors: Hajime Sato, Kenji Hosaka, Hideaki Horie
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Patent number: 8900734Abstract: A bipolar secondary battery comprises laminated bodies. The laminated body comprises bipolar electrodes laminated via an electrolyte layer. The bipolar electrode comprises a positive electrode active material layer and a negative electrode active material layer formed on surfaces of a current collector. A positive electrode is formed on one end of the laminated bodies and a negative electrode is formed on another end. A temperature sensitive resistor having a smaller area than an electrical reaction area of the positive electrode active material layer and the negative electrode active material layer is arranged between the positive electrode and the negative electrode of a pair of adjacent laminated bodies, thereby suppressing a temperature increase caused by a high current by increasing the resistance in response to the flow of the high current into the bipolar secondary battery such as when an external circuit is shorted.Type: GrantFiled: May 17, 2011Date of Patent: December 2, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Kenji Hosaka, Hirotatsu Kamimura, Shiho Inoue, Yasutaka Nakamura, Eiji Minegishi
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Patent number: 8889287Abstract: A voltage detection terminal (27a-27e, 27aa-27ee, 27aaa-27eee) and a discharge terminal (21a-21e) are connected to a peripheral edge portion of a collector (4a-4e) of a bipolar battery (2). Assuming a first straight line (Da1) that connects a centroid of the collector (4a-4e) and the voltage detection terminal (27a-27e) and a second straight line (Da2) that is orthogonal to the first straight line (Da1), the discharge terminal (21a-21e) is disposed on an opposite side of the second straight line (Da2)-the voltage detection terminal (27a-27e). A requirement relating to measurement of a voltage of the collector (4a-4e) and a requirement relating to discharge are thereby both satisfied.Type: GrantFiled: August 4, 2011Date of Patent: November 18, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Naoto Suzuki, Kenji Hosaka, Takaaki Abe, Yasuhito Miyazaki, Hirotatsu Kamimura
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Patent number: 8852785Abstract: A bipolar secondary battery has a battery element that includes first and second bipolar electrodes each having a collector disposed with a conductive resin layer containing a first resin as a base material and positive and negative electrode active material layers formed on opposite sides of the collector and a separator containing a second resin as a base material, arranged between the first and second bipolar electrodes and retaining an electrolyte material to form an electrolyte layer. The positive electrode active material layer of the first bipolar electrode, the electrolyte layer and the negative electrode active material layer of the second bipolar electrode constitute a unit cell. A melting point of the first resin is lower than or equal to a melting point of the second resin. Outer peripheries of the collectors of the first and second bipolar electrodes and an outer periphery of the separator are fused together to thereby seal an outer peripheral portion of the unit cell.Type: GrantFiled: January 28, 2010Date of Patent: October 7, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Kenji Hosaka, Motoharu Obika
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Patent number: 8785041Abstract: An electrode includes a collector formed with a conductive resin layer and an active material layer formed on the conductive resin layer. The active material layer comprises an active material and a binder polymer, and the conductive resin layer is bonded by thermal fusion bonding to the active material layer.Type: GrantFiled: December 11, 2009Date of Patent: July 22, 2014Assignee: Nissan Motor Co., Ltd.Inventors: Shiho Inoue, Hideaki Horie, Kenji Hosaka, Osamu Shimamura, Shigeo Ibuka