Patents by Inventor Toshio Mizoguchi
Toshio Mizoguchi 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: 20240055674Abstract: An electrical device body connectable to a battery pack, includes a drive part, and a terminal part. The terminal part having a positive input terminal electrically connected to the drive part, a negative input terminal electrically connected to the drive part, and a short circuit element having a first terminal part, a second terminal part, and a connection part connecting the first terminal part and the second terminal part, wherein the positive input terminal and the negative input terminal are disposed on an upper side of the terminal part and the short circuit element is disposed on a lower side of the terminal part in an upper-lower direction, the positive input terminal and the negative input terminal being apart from each other in a left-right direction crossing the upper-lower direction.Type: ApplicationFiled: September 27, 2023Publication date: February 15, 2024Applicant: Koki Holdings Co., Ltd.Inventors: Tomomasa NISHIKAWA, Takuya Teranishi, Naoto Wakatabe, Akira Matsushita, Masaru Hirano, Osamu Kawanobe, Nobuhiro TAKANO, Shinji Watanabe, Hiroyuki HANAWA, Takuhiro Murakami, Shota Kanno, Junpei SATO, Hikaru Tamura, Hayato Yamaguchi, Toshio Mizoguchi, Yasushi NAKANO, Kazuhiko FUNABASHI, Masayuki Ogura, Yusuke FUNABIKI, Junichi TOUKAIRIN, Shota TAKEUCHI
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Patent number: 11837741Abstract: The electrical apparatus, in which a series connection state and a parallel connection state of an upper cell unit including five battery cells and a lower cell unit can be automatically switched by means of a difference in a terminal shape on the electrical apparatus body side, has a terminal holder and holds apparatus side terminals. The terminal holder, which establishes an electrically connected state with the connection terminals of the battery pack, is provided with two parallel protruding parts that extend in the forward-backward direction, and second rail grooves fitted to the protruding parts on the electrical apparatus side. Due to the fitting, relative movement of the terminal holder and the battery pack in the vertical direction can be suppressed, and wear on the apparatus side terminals can be greatly suppressed.Type: GrantFiled: June 29, 2018Date of Patent: December 5, 2023Assignee: Koki Holdings Co., Ltd.Inventors: Takuhiro Murakami, Tomomasa Nishikawa, Shinji Watanabe, Junpei Sato, Hikaru Tamura, Shota Kanno, Toshio Mizoguchi, Yasushi Nakano, Hiroyuki Hanawa, Kazuhiko Funabashi, Masayuki Ogura, Takuya Teranishi, Junichi Toukairin, Shota Takeuchi, Yusuke Funabiki
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Patent number: 11824169Abstract: A battery pack houses first and second cell units that are composed of a plurality of cells, and has a positive electrode power source terminal and a negative electrode power source terminal. This battery pack is provided with a series connector capable of connecting, in series, the first and second cell units and a parallel connector capable of connecting, in parallel, the first and second cell units, and is capable of switching between a parallel connection voltage and a series connection voltage. In the case of attachment to the high voltage electrical device body, the series connector becomes conductive and the parallel connector pair is cut off by the action of the series/parallel switching terminal. In the case of attachment to a low voltage electrical device body, the state is returned to an initial state, the series connector is cut off, and the parallel connector pair becomes conductive.Type: GrantFiled: October 27, 2017Date of Patent: November 21, 2023Assignee: Koki Holdings Co., Ltd.Inventors: Tomomasa Nishikawa, Takuya Teranishi, Naoto Wakatabe, Akira Matsushita, Masaru Hirano, Osamu Kawanobe, Nobuhiro Takano, Shinji Watanabe, Hiroyuki Hanawa, Takuhiro Murakami, Shota Kanno, Junpei Sato, Hikaru Tamura, Hayato Yamaguchi, Toshio Mizoguchi, Yasushi Nakano, Kazuhiko Funabashi, Masayuki Ogura, Yusuke Funabiki, Junichi Toukairin, Shota Takeuchi
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Publication number: 20230318055Abstract: An electrical apparatus includes a battery pack, an electrical apparatus main body and a control unit. The battery pack has a plurality of cell units of which connection states are able to be switched and a plurality of battery side connection terminals. The electrical apparatus main body has a battery pack mounting portion to which the battery pack is mounted, a plurality of device side connection terminals to which the plurality of battery side connection terminals are connectable, and a load device to which power is supplied from the battery pack. The control unit is configured to stop or limit power supply from the battery pack to the load device when a voltage imbalance is generated between the plurality of cell units or a contact failure is generated between the plurality of battery side connection terminals and the plurality of device side terminals.Type: ApplicationFiled: June 6, 2023Publication date: October 5, 2023Applicant: Koki Holdings Co., Ltd.Inventors: Yasushi NAKANO, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota Kanno, Toshio Mizoguchi
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Publication number: 20230275277Abstract: A battery pack having a first cell unit and a second cell unit in which multiple battery cells are connected in series is provided. When the battery pack is not connected to an electric apparatus main body, the first cell unit and the second cell unit are in a non-connection state in which the first cell unit and the second cell unit are not electrically connected to each other. The battery pack includes: a microcomputer, connected to one of the first cell unit and the second cell unit; a residual quantity display portion, connected to the microcomputer and displaying a battery residual quantity of the battery pack; and a switch, being operated by a worker. When the switch is operated while in the non-connection state, the microcomputer is configured to perform a light-on control to display the battery residual quantity by the residual quantity display portion.Type: ApplicationFiled: May 2, 2023Publication date: August 31, 2023Applicant: Koki Holdings Co., Ltd.Inventors: Yasushi NAKANO, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota Kanno, Toshio Mizoguchi, Takuya Teranishi
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Patent number: 11710860Abstract: A battery pack which has cell units in which top-side and bottom-side battery cells are connected in series, and is capable of switching the connection state of the cell units, wherein a control unit monitors voltage imbalances between the plurality of cell units, and also monitors whether or not a cell unit contact failure has occurred. In order to stop a charging/discharging when a contact failure occurs, a signal (abnormality stoppage signal or charging stoppage signal) for stopping discharge is produced and outputted to the electrical device body-side.Type: GrantFiled: July 24, 2018Date of Patent: July 25, 2023Assignee: Koki Holdings Co., Ltd.Inventors: Yasushi Nakano, Satoshi Yamaguchi, Hiroyuki Hanawa, Kazuhiko Funabashi, Tomomasa Nishikawa, Shota Kanno, Toshio Mizoguchi
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Publication number: 20220302510Abstract: A battery pack and an electric apparatus are provided. The battery pack is configured to be connectable to an electric apparatus main body of the electric apparatus. The battery pack includes: a first cell unit, including a first plurality of battery cells connected to each other, a first positive terminal, and a first negative terminal; a second cell unit, including a second plurality of battery cells connected to each other, a second positive terminal, and a second negative terminal; a microcomputer; and a casing, accommodating the first cell unit, the second cell unit, and the microcomputer. The first cell unit and the second cell unit are configured to be switched a connection state each other. The microcomputer is configured to be electrically connected to a positive terminal and a negative terminal of one of the first cell unit and the second cell unit and to be provided a power from the one of the first cell unit and the second cell unit.Type: ApplicationFiled: June 6, 2022Publication date: September 22, 2022Applicant: Koki Holdings Co., Ltd.Inventors: Yasushi Nakano, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota KANNO, Toshio Mizoguchi, Takuya Teranishi
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Patent number: 11367907Abstract: A battery pack includes cell units in which upper and lower battery cells are connected in series, wherein an output of series-connection and an output of parallel-connection can be switched. The cell units are respectively provided with protection circuit ICs for monitoring the state of the battery cells, and only the protection circuit on the lower cell unit side is provided with a controller 350 including a microcomputer. To adjust the power consumption for the microcomputer only provided in the lower cell unit, the circuit on the upper cell unit side is provided with a current consumption control means including dummy loads. The current consumption control means is operated in conjunction with the start-up of the microcomputer in the controller so as to equalize power consumption on the upper cell unit side and the lower cell unit side.Type: GrantFiled: May 30, 2018Date of Patent: June 21, 2022Assignee: Koki Holdings Co., Ltd.Inventors: Yasushi Nakano, Satoshi Yamaguchi, Hiroyuki Hanawa, Kazuhiko Funabashi, Tomomasa Nishikawa, Shota Kanno, Toshio Mizoguchi, Takuya Teranishi
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Patent number: 11205820Abstract: In an upper cell unit (2146) and a lower cell unit (2147) comprising five battery cells, positive electrode terminals (2162, 2172) are set apart and aligned vertically, and negative electrode terminals (2167, 2177) are set apart and aligned vertically. When an electrical device body is rated at 36V, device-side terminals are in contact only at the upper terminals (2162, 2167), and short circuiting of the lower terminals (2172, 2177) is effected using a short bar 2059. When the electrical device body is rated at 18V, the upper and lower terminals (2162 and 2172, 2167 and 2177) are simultaneously made to contact the device-side terminals, and the upper cell unit (2146) and the lower cell unit (2147) assume a parallel connected state. Thus, it is possible to automatically switch the output voltage when a battery pack is mounted according to the difference in terminal shape on the electrical device body side.Type: GrantFiled: October 27, 2017Date of Patent: December 21, 2021Assignee: Koki Holdings Co., Ltd.Inventors: Hiroyuki Hanawa, Tomomasa Nishikawa, Shota Kanno, Toshio Mizoguchi, Yasushi Nakano, Kazuhiko Funabashi, Takuya Teranishi, Naoto Wakatabe, Shinji Watanabe, Junpei Sato, Hikaru Tamura, Nobuhiro Takano, Osamu Kawanobe, Hayato Yamaguchi, Akira Matsushita, Masaru Hirano, Takuhiro Murakami, Masayuki Ogura, Yusuke Funabiki, Junichi Toukairin, Shota Takeuchi
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Publication number: 20200212505Abstract: A battery pack includes cell units in which upper and lower battery cells are connected in series, wherein an output of series-connection and an output of parallel-connection can be switched. The cell units are respectively provided with protection circuit ICs for monitoring the state of the battery cells, and only the protection circuit on the lower cell unit side is provided with a controller 350 including a microcomputer. To adjust the power consumption for the microcomputer only provided in the lower cell unit, the circuit on the upper cell unit side is provided with a current consumption control means including dummy loads. The current consumption control means is operated in conjunction with the start-up of the microcomputer in the controller so as to equalize power consumption on the upper cell unit side and the lower cell unit side.Type: ApplicationFiled: May 30, 2018Publication date: July 2, 2020Applicant: Koki Holdings Co., Ltd.Inventors: Yasushi Nakano, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota KANNO, Toshio Mizoguchi, Takuya Teranishi
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Publication number: 20200161609Abstract: The electrical apparatus, in which a series connection state and a parallel connection state of an upper cell unit including five battery cells and a lower cell unit can be automatically switched by means of a difference in a terminal shape on the electrical apparatus body side, has a terminal holder and holds apparatus side terminals. The terminal holder, which establishes an electrically connected state with the connection terminals of the battery pack, is provided with two parallel protruding parts that extend in the forward-backward direction, and second rail grooves fitted to the protruding parts on the electrical apparatus side. Due to the fitting, relative movement of the terminal holder and the battery pack in the vertical direction can be suppressed, and wear on the apparatus side terminals can be greatly suppressed.Type: ApplicationFiled: June 29, 2018Publication date: May 21, 2020Applicant: Koki Holdings Co., Ltd.Inventors: Takuhiro Murakami, Tomomasa NISHIKAWA, Shinji Watanabe, Junpei SATO, Hikaru Tamura, Shota KANNO, Toshio Mizoguchi, Yasushi Nakano, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Masayuki Ogura, Takuya Teranishi, Junichi Toukairin, Shota Takeuchi, Yusuke FUNABIKI
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Publication number: 20200127339Abstract: A battery pack which has cell units in which top-side and bottom-side battery cells are connected in series, and is capable of switching the connection state of the cell units, wherein a control unit monitors voltage imbalances between the cell units, and also monitors whether or not a cell unit contact failure has occurred. In order to stop a charging/discharging when a contact failure occurs, a signal (abnormality stoppage signal or charging stoppage signal) for stopping discharge is produced and outputted to the electrical device body-side.Type: ApplicationFiled: July 24, 2018Publication date: April 23, 2020Applicant: Koki Holdings Co., Ltd.Inventors: Yasushi Nakano, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota KANNO, Toshio Mizoguchi
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Publication number: 20190259984Abstract: A battery pack houses first and second cell units that are composed of a plurality of cells, and has a positive electrode power source terminal and a negative electrode power source terminal. This battery pack is provided with a series connector capable of connecting, in series, the first and second cell units and a parallel connector capable of connecting, in parallel, the first and second cell units, and is capable of switching between a parallel connection voltage and a series connection voltage. In the case of attachment to the high voltage electrical device body, the series connector becomes conductive and the parallel connector pair is cut off by the action of the series/parallel switching terminal. In the case of attachment to a low voltage electrical device body, the state is returned to an initial state, the series connector is cut off, and the parallel connector pair becomes conductive.Type: ApplicationFiled: October 27, 2017Publication date: August 22, 2019Applicant: Koki Holdings Co., Ltd.Inventors: Tomomasa NISHIKAWA, Takuya Teranishi, Naoto Wakatabe, Akira Matsushita, Masaru Hirano, Osamu Kawanobe, Nobuhiro TAKANO, Shinji Watanabe, Hiroyuki HANAWA, Takuhiro Murakami, SHOTA KANNO, Junpei Sato, Hikaru Tamura, Hayato Yamaguchi, Toshio Mizoguchi, Yasushi Nakano, Kazuhiko FUNABASHI, Masayuki Ogura, Yusuke FUNABIKI, Junichi Toukairin, Shota Takeuchi
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Publication number: 20190259985Abstract: In an upper cell unit (2146) and a lower cell unit (2147) comprising five battery cells, positive electrode terminals (2162, 2172) are set apart and aligned vertically, and negative electrode terminals (2167, 2177) are set apart and aligned vertically. When an electrical device body is rated at 36V, device-side terminals are in contact only at the upper terminals (2162, 2167), and short circuiting of the lower terminals (2172, 2177) is effected using a short bar 2059. When the electrical device body is rated at 18V, the upper and lower terminals (2162 and 2172, 2167 and 2177) are simultaneously made to contact the device-side terminals, and the upper cell unit (2146) and the lower cell unit (2147) assume a parallel connected state. Thus, it is possible to automatically switch the output voltage when a battery pack is mounted according to the difference in terminal shape on the electrical device body side.Type: ApplicationFiled: October 27, 2017Publication date: August 22, 2019Applicant: Koki Holdings Co., Ltd.Inventors: Hiroyuki HANAWA, Tomomasa NISHIKAWA, SHOTA KANNO, Toshio Mizoguchi, Yasushi Nakano, Kazuhiko FUNABASHI, Takuya Teranishi, Naoto Wakatabe, Shinji Watanabe, Junpei Sato, Hikaru Tamura, Nobuhiro TAKANO, Osamu Kawanobe, Hayato Yamaguchi, Akira Matsushita, Masaru Hirano, Takuhiro Murakami, Masayuki Ogura, Yusuke Funabiki, Junichi Toukairin, Shota Takeuchi
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Patent number: 9917452Abstract: A battery charger that is configured to charge a battery pack including a secondary battery includes: a housing; and a charging circuit unit disposed in the housing. The housing defines a first air passage in which air flows to cool the secondary battery and a second air passage in which air flows to cool the charging circuit unit. The second air passage is independent from the first air passage.Type: GrantFiled: July 8, 2014Date of Patent: March 13, 2018Assignee: Hitachi Koki Co., Ltd.Inventors: Yuji Kishima, Toshio Mizoguchi
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Publication number: 20150084591Abstract: A battery charger that is configured to charge a battery pack including a secondary battery includes: a housing; and a charging circuit unit disposed in the housing. The housing defines a first air passage in which air flows to cool the secondary battery and a second air passage in which air flows to cool the charging circuit unit. The second air passage is independent from the first air passage.Type: ApplicationFiled: July 8, 2014Publication date: March 26, 2015Inventors: Yuji Kishima, Toshio Mizoguchi
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Publication number: 20120293096Abstract: To prevent or suppress a secondary battery used in a power tool from being deteriorated, a battery property, such as internal resistance of the battery, and a battery status of the secondary battery, such as a voltage developed across the battery, are detected. Based on the battery property and the battery status as detected, a current flowing in the motor of the power tool is controlled.Type: ApplicationFiled: February 2, 2011Publication date: November 22, 2012Applicant: HITACHI KOKI CO. LTD.Inventors: Toshio Mizoguchi, Shinji Watanabe
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Patent number: 7969148Abstract: A magnetic sensor device may include “A”-phase magnetic resistance pattern and “B”-phase magnetic resistance pattern which are provided with a phase difference of 90° from each other; wherein the “A” pattern is provided with “+a” phase magnetic resistance pattern and “?a” phase magnetic resistance pattern with a phase difference of 180° from each other for detecting movement of a magnetic scale, and the “B” pattern is provided with “+b” phase magnetic resistance pattern and “?b” phase magnetic resistance pattern with a phase difference of 180° from each other for detecting movement of the magnetic scale, and the “+a” pattern, the “?a” pattern, the “+b” pattern and the “?b” pattern are formed on a same face of one piece of board so that the “+a” pattern and the “?a” pattern are diagonally located and the “+b” pattern and the “?b” pattern are diagonally located.Type: GrantFiled: March 5, 2007Date of Patent: June 28, 2011Assignee: Nidec Sankyo CorporationInventors: Naoyuki Noguchi, Katsuya Moriyama, Teruhiko Otaki, Fusayoshi Argua, Toshio Mizoguchi
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Publication number: 20100176761Abstract: The peripheral edge of the upper face 31A of a plate-shaped portion 31 of a holding member 30 confronts a terminal exposing through hole, cast through holes, and the inner periphery of an upper housing 10, i.e., a portion defining the terminal exposing through hole and the cast through holes. The upper face 31A of the plate-shaped portion 31 defines a passage for passing rain water having flown from the terminal exposing through hole and the cast through holes into a housing space 1a. The lower end of the passage forms grooves 30a and communicates with stepped through holes 12a formed in the upper housing 10, so that the rainwater is released from the stepped through holes 12a to the outside of the upper housing 10.Type: ApplicationFiled: September 7, 2007Publication date: July 15, 2010Applicant: HITACHI KOKI CO., LTD.Inventors: Toshiyuki Suzuki, Hiroyuki Hanawa, Toshio Mizoguchi
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Patent number: D622661Type: GrantFiled: January 8, 2010Date of Patent: August 31, 2010Assignee: Hitachi Koki Co., Ltd.Inventors: Kenichi Yamada, Tomoyuki Kawahara, Toshio Mizoguchi