Patents by Inventor Yoshio Matsuyama
Yoshio Matsuyama 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: 11858370Abstract: A vehicle includes: a battery that is chargeable with electric power supplied from a charger provided outside the vehicle; and an air-conditioning and cooling system that cools the battery. An ECU controls a charging operation for the battery such that the battery is charged under a charging condition of a constant current which is constant over a charging period from start of charging to satisfaction of a completion condition. The ECU sets the charging condition such that a battery temperature when the completion condition is satisfied becomes an upper limit temperature, based on an amount of heat generation in the battery caused by charging and an amount of cooling of the battery by the air-conditioning and cooling system.Type: GrantFiled: January 10, 2020Date of Patent: January 2, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshio Matsuyama, Yugo Mochizuki, Yoshiaki Kawakami, Masataka Ogushi
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Patent number: 11340302Abstract: By a first energization process of applying a voltage with the power supply to cause a current for charging the electrical storage device to flow through the circuit and a second energization process of, when a transition condition is satisfied during the first energization process, decreasing the voltage of the power supply to cause the current to further flow, a condition of an electrical storage is determined. An effective resistance value of the circuit is set to 0.1? or below. A decrease in the voltage of the power supply in transition from the first energization process to the second energization process is set such that the effective resistance value in the second energization process is an intermediate value between a parasitic resistance value of the circuit and the effective resistance value in the first energization process.Type: GrantFiled: September 25, 2020Date of Patent: May 24, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshio Matsuyama, Ruri Tanaka, Kiwamu Kobayashi
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Publication number: 20210173013Abstract: By a first energization process of applying a voltage with the power supply to cause a current for charging the electrical storage device to flow through the circuit and a second energization process of, when a transition condition is satisfied during the first energization process, decreasing the voltage of the power supply to cause the current to further flow, a condition of an electrical storage is determined. An effective resistance value of the circuit is set to 0.1? or below. A decrease in the voltage of the power supply in transition from the first energization process to the second energization process is set such that the effective resistance value in the second energization process is an intermediate value between a parasitic resistance value of the circuit and the effective resistance value in the first energization process.Type: ApplicationFiled: September 25, 2020Publication date: June 10, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshio MATSUYAMA, Ruri TANAKA, Kiwamu KOBAYASHI
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Publication number: 20200231060Abstract: A vehicle includes: a battery that is chargeable with electric power supplied from a charger provided outside the vehicle; and an air-conditioning and cooling system that cools the battery. An ECU controls a charging operation for the battery such that the battery is charged under a charging condition of a constant current which is constant over a charging period from start of charging to satisfaction of a completion condition. The ECU sets the charging condition such that a battery temperature when the completion condition is satisfied becomes an upper limit temperature, based on an amount of heat generation in the battery caused by charging and an amount of cooling of the battery by the air-conditioning and cooling system.Type: ApplicationFiled: January 10, 2020Publication date: July 23, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshio MATSUYAMA, Yugo MOCHIZUKI, Yoshiaki KAWAKAMI, Masataka OGUSHI
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Patent number: 10553910Abstract: A method of performing a formation process for a lithium-ion cell having an anode, a cathode, an electrolyte and a separator, the formation process including adding an additive to the electrolyte for improving a solid electrolyte interface build-up on the anode, performing a first charge of the cell at a first predetermined rate, performing a cycle of discharging/charging the cell at the first predetermined rate, repeating the cycle until a cycle maximum dQ/dV peak value is smaller than or equal to a predetermined dQ/dV value during charging of the cell and charging the cell to a fully charged capacity at a second predetermine rate, the second predetermined rate being greater than the first predetermined rate.Type: GrantFiled: March 25, 2016Date of Patent: February 4, 2020Assignees: TOYOTA MOTOR EUROPE, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takahiro Sakurai, Tomohide Sumi, Yoshio Matsuyama
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Publication number: 20190245250Abstract: A method of performing a formation process for a lithium-ion cell having an anode, a cathode, an electrolyte and a separator, the formation process including adding an additive to the electrolyte for improving a solid electrolyte interface build-up on the anode, performing a first charge of the cell at a first predetermined rate, performing a cycle of discharging/charging the cell at the first predetermined rate, repeating the cycle until a cycle maximum dQ/dV peak value is smaller than or equal to a predetermined dQ/dV value during charging of the cell and charging the cell to a fully charged capacity at a second predetermine rate, the second predetermined rate being greater than the first predetermined rate.Type: ApplicationFiled: March 25, 2016Publication date: August 8, 2019Applicants: Toyota Motor Europe, Toyota Jidosha Kabushiki KaishaInventors: Takahiro SAKURAI, Tomohide SUMI, Yoshio MATSUYAMA
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Patent number: 10261131Abstract: An inspection method for a secondary battery according to the invention includes: a first aging treatment process for performing aging treatment on the secondary battery that has initially been charged at a first temperature; a first voltage measurement process; a second aging treatment process for performing the aging treatment on the secondary battery at a second temperature; a second voltage measurement process; a self-discharge amount computation process; a non-temperature dependent failure determination process for determining non-temperature dependent failure that does not depend on a relationship between a self-discharge amount and a temperature in accordance with the measured self-discharge amount; and a temperature dependent failure determination process for determining temperature dependent failure that depends on the relationship between the self-discharge amount and the temperature in accordance with the self-discharge amount, temperature dependency of which is suppressed.Type: GrantFiled: March 21, 2016Date of Patent: April 16, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshio Matsuyama, Tomohide Sumi, Yosuke Shimura
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Patent number: 10126373Abstract: An inspection method of a secondary battery according to the present invention includes: a charging step of charging an inspection target cell to a predetermined voltage set in advance; a voltage drop amount calculation step of calculating an amount of a voltage drop due to discharge by discharging the inspection target cell at a voltage of not more than the predetermined voltage; a non-defective product determination step of determining that the inspection target cell is a non-defective product, when the voltage drop amount is a threshold or less; and an aging step of performing aging after the non-defective product determination step.Type: GrantFiled: February 25, 2016Date of Patent: November 13, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yosuke Shimura, Tomohide Sumi, Yoshio Matsuyama
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Patent number: 10033216Abstract: An initial charging method for a lithium-ion battery according to this embodiment includes preparing a cell having a positive electrode, a negative electrode, and an electrolyte and charging the cell by using voltages based on the amount of change in a capacity of the cell per unit voltage as a specified voltage.Type: GrantFiled: February 8, 2016Date of Patent: July 24, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohide Sumi, Yoshio Matsuyama, Yosuke Shimura
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Patent number: 10026933Abstract: A nonaqueous electrolyte battery provided by the present invention includes: an electrode body (80) having a flat shape and including a positive electrode and a negative electrode (60); a square-shaped battery case (30) configured to accommodate therein the electrode body (80) and a nonaqueous electrolyte; and a negative electrode collector terminal (94) placed in the battery case (30) and connected to the negative electrode (60) of the electrode body (80). The negative electrode collector terminal (94) is mainly made of copper or copper alloy. An insulator film (10) configured to insulate the battery case (30) from the electrode body (80) is placed between an inner wall (30a) of the battery case (30) and the electrode body (80). The insulator film (10) is joined to the inner wall (30a) of the battery case (30), and the insulator film (10) is placed so as not to make contact with the negative electrode collector terminal (94).Type: GrantFiled: August 20, 2014Date of Patent: July 17, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Harayama, Koji Takahata, Tomohide Sumi, Yoshio Matsuyama
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Publication number: 20160291093Abstract: An inspection method for a secondary battery according to the invention includes: a first aging treatment process for performing aging treatment on the secondary battery that has initially been charged at a first temperature; a first voltage measurement process; a second aging treatment process for performing the aging treatment on the secondary battery at a second temperature; a second voltage measurement process; a self-discharge amount computation process; a non-temperature dependent failure determination process for determining non-temperature dependent failure that does not depend on a relationship between a self-discharge amount and a temperature in accordance with the measured self-discharge amount; and a temperature dependent failure determination process for determining temperature dependent failure that depends on the relationship between the self-discharge amount and the temperature in accordance with the self-discharge amount, temperature dependency of which is suppressed.Type: ApplicationFiled: March 21, 2016Publication date: October 6, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshio MATSUYAMA, Tomohide SUMI, Yosuke SHIMURA
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Publication number: 20160252586Abstract: An inspection method of a secondary battery according to the present invention includes: a charging step of charging an inspection target cell to a predetermined voltage set in advance; a voltage drop amount calculation step of calculating an amount of a voltage drop due to discharge by discharging the inspection target cell at a voltage of not more than the predetermined voltage; a non-defective product determination step of determining that the inspection target cell is a non-defective product, when the voltage drop amount is a threshold or less; and an aging step of performing aging after the non-defective product determination step.Type: ApplicationFiled: February 25, 2016Publication date: September 1, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yosuke SHIMURA, Tomohide SUMI, Yoshio MATSUYAMA
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Publication number: 20160233691Abstract: An initial charging method for a lithium-ion battery according to this embodiment includes preparing a cell having a positive electrode, a negative electrode, and an electrolyte and charging the cell by using voltages based on the amount of change in a capacity of the cell per unit voltage as a specified voltage.Type: ApplicationFiled: February 8, 2016Publication date: August 11, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohide SUMI, Yoshio MATSUYAMA, Yosuke SHIMURA
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Publication number: 20160204393Abstract: A nonaqueous electrolyte battery provided by the present invention includes: an electrode body (80) having a flat shape and including a positive electrode and a negative electrode (60); a square-shaped battery case (30) configured to accommodate therein the electrode body (80) and a nonaqueous electrolyte; and a negative electrode collector terminal (94) placed in the battery case (30) and connected to the negative electrode (60) of the electrode body (80). The negative electrode collector terminal (94) is mainly made of copper or copper alloy. An insulator film (10) configured to insulate the battery case (30) from the electrode body (80) is placed between an inner wall (30a) of the battery case (30) and the electrode body (80). The insulator film (10) is joined to the inner wall (30a) of the battery case (30), and the insulator film (10) is placed so as not to make contact with the negative electrode collector terminal (94).Type: ApplicationFiled: August 20, 2014Publication date: July 14, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi HARAYAMA, Koji TAKAHATA, Tomohide SUMI, Yoshio MATSUYAMA
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Publication number: 20150162645Abstract: There is provided a manufacturing process of a battery equipped with a case and an electrode body having a positive electrode, a negative electrode and separators. The electrode body has an upper R portion and the respective separators have surplus portions. The case has an accommodation portion that has an opening in an upper face thereof and accommodates the electrode body, and a lid portion that closes up the opening in the upper face of the accommodation portion.Type: ApplicationFiled: June 27, 2013Publication date: June 11, 2015Applicants: NACHI-FUJIKOSHI CORP., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kiwamu Kobayashi, Yoshio Matsuyama, Hideto Mori, Tomoyasu Furuta