Patents by Inventor Ikuo USAMI
Ikuo USAMI 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: 11691496Abstract: In a vehicle drive system using a motor for cruising, the connection node of serially-connected first and second batteries is grounded. The operation of an inverter is controlled so that the motor drive voltage is higher than the output voltage of each of the first and second batteries. A battery unit is configured so that third and fourth batteries each in a form of a cartridge are removably loaded, and the loaded third battery is connected in parallel with the first battery and the loaded fourth battery is connected in parallel with the second battery.Type: GrantFiled: June 10, 2021Date of Patent: July 4, 2023Assignee: MAZDA MOTOR CORPORATIONInventors: Akihiro Furukawa, Ikuo Usami, Kazuya Kotani, Seiyo Hirano
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Patent number: 11643065Abstract: In a vehicle drive system using a motor for cruising, the connection node of serially-connected first and second batteries is grounded. The operation of an inverter is controlled so that the motor drive voltage is higher than the output voltage of each of the first and second batteries. A balance circuit balances the charged amounts of the first and second batteries by performing charge/discharge control between the first and second batteries.Type: GrantFiled: June 9, 2021Date of Patent: May 9, 2023Assignee: MAZDA MOTOR CORPORATIONInventors: Akihiro Furukawa, Ikuo Usami, Seiyo Hirano
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Publication number: 20210394606Abstract: In a vehicle drive system using a motor for cruising, the connection node of serially-connected first and second batteries is grounded. The operation of an inverter is controlled so that the motor drive voltage is higher than the output voltage of each of the first and second batteries. A battery unit is configured so that third and fourth batteries each in a form of a cartridge are removably loaded, and the loaded third battery is connected in parallel with the first battery and the loaded fourth battery is connected in parallel with the second battery.Type: ApplicationFiled: June 10, 2021Publication date: December 23, 2021Applicant: Mazda Motor CorporationInventors: Akihiro FURUKAWA, Ikuo USAMI, Kazuya KOTANI, Seiyo HIRANO
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Publication number: 20210394737Abstract: In a vehicle drive system using a motor for cruising, the connection node of serially-connected first and second batteries is grounded. The operation of an inverter is controlled so that the motor drive voltage is higher than the output voltage of each of the first and second batteries. A balance circuit balances the charged amounts of the first and second batteries by performing charge/discharge control between the first and second batteries.Type: ApplicationFiled: June 9, 2021Publication date: December 23, 2021Applicant: Mazda Motor CorporationInventors: Akihiro FURUKAWA, Ikuo USAMI, Seiyo HIRANO
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Publication number: 20210394740Abstract: In a vehicle drive system using a motor for cruising, the connection node of serially-connected first and second batteries is grounded. The operation of an inverter is controlled so that the motor drive voltage is higher than the output voltage of each of the first and second batteries. The vehicle drive system is configured so that electric power can be supplied, from each of the first and second batteries, to an electric apparatus mounted in a vehicle other than the inverter.Type: ApplicationFiled: June 10, 2021Publication date: December 23, 2021Applicant: Mazda Motor CorporationInventors: Akihiro FURUKAWA, Ikuo USAMI, Seiyo HIRANO
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Publication number: 20210394609Abstract: In a vehicle drive system using a motor for cruising, the connection node of serially-connected first and second batteries is connected with the connection node of first and second capacitors of an inverter. The operation of the inverter is controlled so that the motor drive voltage is higher than the output voltage of each of the first and second batteries. A balance circuit balances the voltages of the first and second capacitors by performing charge/discharge control between the first and second batteries.Type: ApplicationFiled: June 10, 2021Publication date: December 23, 2021Applicant: Mazda Motor CorporationInventors: Akihiro FURUKAWA, Ikuo USAMI, Seiyo HIRANO
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Patent number: 8733487Abstract: A battery unit comprises plural side connection portions which are provided at its both-side end portions in a vehicle width direction and connected to said vehicle-body member, and these connection portions are connected to a high rigidity portion of a vehicle-body member, concretely, to the vehicle-body member at a specified position where floor cross members integrally connected to a vehicle floor panel are located, to the vehicle-body member at a specified position where a torque box is located, or to the vehicle-body member at a specified position where a kick-up portion of the vehicle floor panel is located. Accordingly, the torsional rigidity of the vehicle body can be increased by utilizing the battery unit mounted below the vehicle body floor (vehicle floor panel).Type: GrantFiled: October 19, 2011Date of Patent: May 27, 2014Assignee: Mazda Motor CorporationInventors: Ikuo Usami, Hirokazu Kita, Hiroyuki Nomura, Noriaki Mitobe
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Patent number: 8464817Abstract: Plural battery modules mounted on a first mount portion of a battery unit which is positioned below a front floor portion are arranged in a vehicle longitudinal direction such that the longitudinal direction of each of the battery modules matches a vehicle width direction and the short side of a rectangular section of each of the battery modules extends in a vehicle vertical direction, and plural battery modules mounted on a second mount portion which is positioned below a rear floor portion are arranged in the vehicle width direction such that the longitudinal direction of each of the battery modules matches the vehicle longitudinal direction and the long side of the rectangular section of each of the battery modules extends in the vehicle vertical direction. Accordingly, the plural battery modules can be arranged efficiently.Type: GrantFiled: May 26, 2011Date of Patent: June 18, 2013Assignee: Mazda Motor CorporationInventors: Ikuo Usami, Hirokazu Kita, Hiroyuki Nomura, Seiji Sadahira
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Publication number: 20120097466Abstract: A battery unit comprises plural side connection portions which are provided at its both-side end portions in a vehicle width direction and connected to said vehicle-body member, and these connection portions are connected to a high rigidity portion of a vehicle-body member, concretely, to the vehicle-body member at a specified position where floor cross members integrally connected to a vehicle floor panel are located, to the vehicle-body member at a specified position where a torque box is located, or to the vehicle-body member at a specified position where a kick-up portion of the vehicle floor panel is located. Accordingly, the torsional rigidity of the vehicle body can be increased by utilizing the battery unit mounted below the vehicle body floor (vehicle floor panel).Type: ApplicationFiled: October 19, 2011Publication date: April 26, 2012Applicant: MAZDA MOTOR CORPORATIONInventors: Ikuo USAMI, Hirokazu KITA, Hiroyuki NOMURA, Noriaki MITOBE
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Publication number: 20110297469Abstract: Plural battery modules mounted on a first mount portion of a battery unit which is positioned below a front floor portion are arranged in a vehicle longitudinal direction such that the longitudinal direction of each of the battery modules matches a vehicle width direction and the short side of a rectangular section of each of the battery modules extends in a vehicle vertical direction, and plural battery modules mounted on a second mount portion which is positioned below a rear floor portion are arranged in the vehicle width direction such that the longitudinal direction of each of the battery modules matches the vehicle longitudinal direction and the long side of the rectangular section of each of the battery modules extends in the vehicle vertical direction. Accordingly, the plural battery modules can be arranged efficiently.Type: ApplicationFiled: May 26, 2011Publication date: December 8, 2011Applicant: MAZDA MOTOR CORPORATIONInventors: Ikuo USAMI, Hirokazu KITA, Hiroyuki NOMURA, Seiji SADAHIRA