Patents by Inventor Bunya Sato
Bunya Sato 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: 10008862Abstract: There is provided a power storage device including a plurality of modules each including secondary batteries, a charging switch that controls charging to the secondary batteries, a discharging switch that controls discharging of the secondary batteries, and a voltage measuring unit that measures a voltage of the module, and a switch control unit that controls one or both of the charging switch and the discharging switch. The modules are connected in parallel. The switch control unit maintains an on state of the discharging switch for at least one of the modules for a predetermined period, and controls the charging switch of the module in which a maximum module charging current estimated based on the voltage of the module is a predetermined value or less, to be in an on state.Type: GrantFiled: March 6, 2014Date of Patent: June 26, 2018Assignee: Murata Manufacturing Co., Ltd.Inventors: Shuichi Takizawa, Naoyuki Sugeno, Koji Umetsu, Eiji Kumagai, Bunya Sato, Aniket Khade, Tatsuya Adachi, Atsushi Chinen, Hisato Asai, Kohki Watanabe
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Publication number: 20160049813Abstract: There is provided a power storage device including a plurality of modules each including secondary batteries, a charging switch that controls charging to the secondary batteries, a discharging switch that controls discharging of the secondary batteries, and a voltage measuring unit that measures a voltage of the module, and a switch control unit that controls one or both of the charging switch and the discharging switch. The modules are connected in parallel. The switch control unit maintains an on state of the discharging switch for at least one of the modules for a predetermined period, and controls the charging switch of the module in which a maximum module charging current estimated based on the voltage of the module is a predetermined value or less, to be in an on state.Type: ApplicationFiled: March 6, 2014Publication date: February 18, 2016Inventors: Shuichi TAKIZAWA, Naoyuki SUGENO, Koji UMETSU, Eiji KUMAGAI, Bunya SATO, Aniket KHADE, Tatsuya ADACHI, Atsushi CHINEN, Hisato ASAI, Kohki WATANABE
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Publication number: 20110293998Abstract: In one example embodiment, a battery unit includes a battery case, and a plurality of battery blocks stored in the battery case. The plurality of battery blocks are electrically connected together in series. In one example embodiment, a first plurality of the battery blocks form a first column and are arranged in a side-to-side configuration. In one example embodiment, a second plurality of the battery blocks form a second column and are arranged in an end-to-end configuration which is different from the side-to-side configuration.Type: ApplicationFiled: May 23, 2011Publication date: December 1, 2011Applicant: SONY CORPORATIONInventors: Bunya Sato, Tatsuya Adachi, Hiroshi Kano, Tsutomu Aoyama, Tsuyoshi Toukairin, Akira Sanpei
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Patent number: 7858221Abstract: A power supply apparatus in which a battery and a circuit wiring board or boards are electrically connected by using lead terminals. The lead terminal is adapted so that thickness of a welding portion is caused to be thinner than the thickness of a conductive portion. Thus, current for welding flows to much degree in a thickness direction so that electric resistance of the welding portion becomes large, and heat based on the electric resistance also becomes large. From this fact, welding nugget can be enlarged. As the result of the fact that large welding nugget is formed, the lead terminals are welded to terminal portions of the battery with high reliability.Type: GrantFiled: January 14, 2004Date of Patent: December 28, 2010Assignee: Sony CorporationInventor: Bunya Sato
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Publication number: 20100253285Abstract: A battery pack includes one or a plurality of secondary batteries that are connected with each other; a positive pole terminal and a negative pole terminal to which external equipment is connected; a variable resistance portion which is connected between a positive pole of the secondary battery and the positive pole terminal or between a negative pole of the secondary battery and the negative pole terminal and resistance values of which are changed; a battery voltage measuring portion for measuring the voltage of the secondary battery; and a controlling portion for controlling the resistance value of the variable resistance portion based on the measurement result of the battery voltage measuring portion.Type: ApplicationFiled: March 16, 2010Publication date: October 7, 2010Applicant: SONY CORPORATIONInventors: Tsukasa Takahashi, Bunya Sato
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Patent number: 7737658Abstract: A battery pack having a secondary battery is disclosed. The battery pack comprises at least one voltage converter; and switching means for switching an operation mode of the voltage converter to one of a charging mode and a discharging mode, in the charging mode, a charging voltage being output to the secondary battery, in the discharging mode, a voltage of the secondary battery being converted into a predetermined discharging voltage and the converted voltage being output.Type: GrantFiled: October 22, 2004Date of Patent: June 15, 2010Assignee: Sony CorporationInventors: Hiromitsu Sennami, Kazuhiko Takahashi, Daiki Misawa, Bunya Sato, Takayuki Aita
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Patent number: 7727672Abstract: A metal plate and an electrode in a polymer lithium ion secondary battery or the like are welded certainly, and it is accomplished to further improve the reliability and the durability thereof. Each of an upper metal plate (7a) and a lower metal plate (9a) on the positive pole/terminal is welded to a pole/terminal of positive electrode (3) so that the pole/terminal of positive electrode (3) may be sandwiched from each of the upper and lower sides. Moreover, each of an upper metal plate (7b) and a lower metal plate (9b) on the negative pole/terminal is welded to a pole/terminal of negative electrode (5) so that the pole/terminal of negative electrode (5) may be sandwiched from each of the upper and lower sides. This eliminates occurrence of poor welding in the electric resistance welding.Type: GrantFiled: January 24, 2006Date of Patent: June 1, 2010Assignee: Sony CorporationInventors: Kiyoshi Kikuchi, Koichi Fukata, Bunya Sato, Shuji Sasaki, Chiaki Anzai, Hiroshi Anzai
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Patent number: 7649340Abstract: A protecting circuit monitors a voltage of a secondary battery and supplies the signal to permit a discharge to a gate terminal of a discharge control FET when the voltage is equal to or more than a lower limit value in a rated voltage range. When the discharge control FET receives this signal, it is connected and passes a discharge current. In the other cases, it shuts off the discharge current. Further, when the voltage is equal to or more than a predetermined value, a signal of a voltage of a battery voltage or more is supplied from a voltage converter to the gate terminal. When the voltage is equal to or less than an upper limit value in the rated voltage range, the protecting circuit supplies the signal to permit a charge to a gate terminal of a charge control FET. Further, when the voltage is equal to or more than a predetermined value, the voltage output from the voltage converter is supplied to the gate terminal.Type: GrantFiled: October 23, 2008Date of Patent: January 19, 2010Assignee: Sony CorporationInventors: Bunya Sato, Masahiko Hayakawa
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Patent number: 7588858Abstract: A metal plate and an electrode in a polymer lithium ion secondary battery or the like are welded certainly, and it is accomplished to further improve the reliability and the durability thereof. Each of an upper metal plate (7a) and a lower metal plate (9a) on the positive pole/terminal is welded to a pole/terminal of positive electrode (3) so that the pole/terminal of positive electrode (3) may be sandwiched from each of the upper and lower sides. Moreover, each of an upper metal plate (7b) and a lower metal plate (9b) on the negative pole/terminal is welded to a pole/terminal of negative electrode (5) so that the pole/terminal of negative electrode (5) may be sandwiched from each of the upper and lower sides. This eliminates occurrence of poor welding in the electric resistance welding.Type: GrantFiled: January 24, 2006Date of Patent: September 15, 2009Assignee: Sony CorporationInventors: Kiyoshi Kikuchi, Koichi Fukata, Bunya Sato, Shuji Sasaki, Chiaki Anzai, Hiroshi Anzai
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Patent number: 7531988Abstract: A battery pack including at least a battery cell and a protection circuit for shutting off a overcurrent discharge, comprising a discharge control switch connected between a negative terminal of the battery cell and a external minus terminal configured to close after the detection of an abnormal discharge shut-off condition. A shut-off holding unit is configured to maintain a discharge shut-off condition after the detection of an abnormal discharge shut-off condition due to the shorting or connection of a low resistance between a external plus terminal and a external minus terminal of the battery pack, and a releasing unit configured to release the discharge shut-off condition maintained by the shut-off holding unit by applying a predetermined voltage between the external plus terminal and the external minus terminal of the battery pack. Additionally, the discharge control switch is one of a mechanical switch, a transistor, and a field effect transistor.Type: GrantFiled: February 28, 2008Date of Patent: May 12, 2009Assignee: Sony CorporationInventor: Bunya Sato
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Publication number: 20090051323Abstract: A protecting circuit monitors a voltage of a secondary battery and supplies the signal to permit a discharge to a gate terminal of a discharge control FET when the voltage is equal to or more than a lower limit value in a rated voltage range. When the discharge control FET receives this signal, it is connected and passes a discharge current. In the other cases, it shuts off the discharge current. Further, when the voltage is equal to or more than a predetermined value, a signal of a voltage of a battery voltage or more is supplied from a voltage converter to the gate terminal. When the voltage is equal to or less than an upper limit value in the rated voltage range, the protecting circuit supplies the signal to permit a charge to a gate terminal of a charge control FET. Further, when the voltage is equal to or more than a predetermined value, the voltage output from the voltage converter is supplied to the gate terminal.Type: ApplicationFiled: October 23, 2008Publication date: February 26, 2009Inventors: Bunya Sato, Masahiko Hayakawa
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Patent number: 7456614Abstract: A protecting circuit monitors a voltage of a secondary battery and supplies the signal to permit a discharge to a gate terminal of a discharge control FET when the voltage is equal to or more than a lower limit value in a rated voltage range. When the discharge control FET receives this signal, it is connected and passes a discharge current. In the other cases, it shuts off the discharge current. Further, when the voltage is equal to or more than a predetermined value, a signal of a voltage of a battery voltage or more is supplied from a voltage converter to the gate terminal. When the voltage is equal to or less than an upper limit value in the rated voltage range, the protecting circuit supplies the signal to permit a charge to a gate terminal of a charge control FET. Further, when the voltage is equal to or more than a predetermined value, the voltage output from the voltage converter is supplied to the gate terminal.Type: GrantFiled: October 26, 2004Date of Patent: November 25, 2008Assignee: Sony CorporationInventors: Bunya Sato, Masahiko Hayakawa
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Publication number: 20080158755Abstract: A battery pack including at least a battery cell and a protection circuit for shutting off a overcurrent discharge, comprising a discharge control switch connected between a negative terminal of the battery cell and a external minus terminal configured to close after the detection of an abnormal discharge shut-off condition. A shut-off holding unit is configured to maintain a discharge shut-off condition after the detection of an abnormal discharge shut-off condition due to the shorting or connection of a low resistance between a external plus terminal and a external minus terminal of the battery pack, and a releasing unit configured to release the discharge shut-off condition maintained by the shut-off holding unit by applying a predetermined voltage between the external plus terminal and the external minus terminal of the battery pack. Additionally, the discharge control switch is one of a mechanical switch, a transistor, and a field effect transistor.Type: ApplicationFiled: February 28, 2008Publication date: July 3, 2008Applicant: SONY CORPORATIONInventor: Bunya Sato
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Patent number: 7365952Abstract: The battery pack according to the present invention is to avoid any trouble or the like of the primary or secondary battery inside the battery pack with a simple mechanical construction when a load is intermittently connected between the external terminals of the battery pack. For this end, the battery pack includes at least the battery cell and a protection circuit for shutting off overcurrent discharge and features in the provision of shut-off holding means and releasing means. The shut-off holding means maintains discharge shut-off condition after abnormal discharge shut-off by shorting or connecting a low resistance between the external plus terminal and the external minus terminal from outside of the battery pack. The releasing means releases the shut-off condition of the shut-off holding means when a predetermined voltage is applied between the external plus terminal and the external minus terminal.Type: GrantFiled: November 24, 2003Date of Patent: April 29, 2008Assignee: Sony CorporationInventor: Bunya Sato
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Patent number: 7316863Abstract: A battery pack housing a plurality of battery cells in a case and respectively connecting the positive electrodes and the negative electrodes of the plurality of battery cells to conductive terminal boards to be led out to outside terminals is provided. The conductive terminal board has a structure in which a first member is joined with a second member such that the first member having excellent weldability is arrayed in a plurality-of-islands state in the second member having excellent conductivity, and the positive electrodes and the negative electrodes of the battery cell are welded to the first member of the conductive terminal board through resistance-welding, so that the battery pack capable of efficiently supplying a large amount of current is provided.Type: GrantFiled: April 2, 2004Date of Patent: January 8, 2008Assignee: Sony CorporationInventor: Bunya Sato
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Publication number: 20070037054Abstract: A metal plate and an electrode in a polymer lithium ion secondary. battery or the like are welded certainly, and it is accomplished to further improve the reliability and the durability thereof. Each of an upper metal plate (7a) and a lower metal plate (9a) on the positive pole/terminal is welded to a pole/terminal of positive electrode (3) so that the pole/terminal of positive electrode (3) may be sandwiched from each of the upper and lower sides. Moreover, each of an upper metal plate (7b) and a lower metal plate (9b) on the negative pole/terminal is welded to a pole/terminal of negative electrode (5) so that the pole/terminal of negative electrode (5) may be sandwiched from each of the upper and lower sides. This eliminates occurrence of poor welding in the electric resistance welding.Type: ApplicationFiled: January 24, 2006Publication date: February 15, 2007Inventors: Kiyoshi Kikuchi, Koichi Fukata, Bunya Sato, Shuji Sasaki, Chiaki Anzai, Hiroshi Anzai
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Publication number: 20060159987Abstract: A metal plate and an electrode in a polymer lithium ion secondary battery or the like are welded certainly, and it is accomplished to further improve the reliability and the durability thereof Each of an upper metal plate (7a) and a lower metal plate (9a) on the positive pole/terminal is welded to a pole/terminal of positive electrode (3) so that the pole/terminal of positive electrode (3) may be sandwiched from each of the upper and lower sides. Moreover, each of an upper metal plate (7b) and a lower metal plate (9b) on the negative pole/terminal is welded to a pole/terminal of negative electrode (5) so that the pole/terminal of negative electrode (5) may be sandwiched from each of the upper and lower sides. This eliminates occurrence of poor welding in the electric resistance welding.Type: ApplicationFiled: January 24, 2006Publication date: July 20, 2006Inventors: Kiyoshi Kikuchi, Koichi Fukata, Bunya Sato, Shuji Sasaki, Chiaki Anzai, Hiroshi Anzai
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Patent number: 7037621Abstract: A metal plate and an electrode in a polymer lithium ion secondary battery or the like are welded certainly, and it is accomplished to further improve the reliability and the durability thereof. Each of an upper metal plate (7a) and a lower metal plate (9a) on the positive pole/terminal is welded to a pole/terminal of positive electrode (3) so that the pole/terminal of positive electrode (3) may be sandwiched from each of the upper and lower sides. Moreover, each of an upper metal plate (7b) and a lower metal plate (9b) on the negative pole/terminal is welded to a pole/terminal of negative electrode (5) so that the pole/terminal of negative electrode (5) may be sandwiched from each of the upper and lower sides. This eliminates occurrence of poor welding in the electric resistance welding.Type: GrantFiled: October 31, 2001Date of Patent: May 2, 2006Assignee: Sony CorporationInventors: Kiyoshi Kikuchi, Koichi Fukuta, Bunya Sato, Shuji Sasaki, Chiaki Anzai, Hiroshi Anzai
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Patent number: 7019490Abstract: In a battery pack including a plurality of secondary batteries within an outer case, any one of an adhesive, a gel filler, and a flat rubber sheet having a thermal conductivity of more than 0.4 W/mK (0.96×10?3 cal/cm·sec·° C.) is provided at a gap between the plurality of secondary batteries and the outer case.Type: GrantFiled: October 22, 2003Date of Patent: March 28, 2006Assignee: Sony CorporationInventor: Bunya Sato
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Publication number: 20060032667Abstract: The present invention is directed to a power supply apparatus in which a battery and a circuit wiring board or boards are electrically connected by using lead terminals. The lead terminal (3) is adapted so that thickness of a welding portion (3a) is caused to be thinner than the thickness of a conductive portion (3b). Thus, current for welding flows to much degree in a thickness direction so that electric resistance of the welding portion becomes large, and heat based on the electric resistance also becomes large. From this fact, welding nugget (63) can be enlarged. As the result of the fact that large welding nugget is formed, the lead terminals are welded to terminal portions (37a) of the battery (2) with high reliability.Type: ApplicationFiled: January 14, 2004Publication date: February 16, 2006Applicant: SONY CORPORATIONInventor: Bunya Sato