Patents by Inventor Hiroyuki Hanawa

Hiroyuki Hanawa 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).

  • Publication number: 20220302510
    Abstract: 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: Application
    Filed: June 6, 2022
    Publication date: September 22, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yasushi Nakano, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota KANNO, Toshio Mizoguchi, Takuya Teranishi
  • Publication number: 20220223949
    Abstract: A battery pack includes: a connection terminal group including a positive electrode terminal and a negative electrode terminal, which are connected to a battery cell; a wireless communication unit for performing a wireless communication with an external device; a wireless control circuit for controlling the wireless communication unit; and a circuit board on which the wireless communication unit is mounted. The wireless communication unit includes an antenna wire that is extended along the surface of the circuit board; a rubber sheet member is provided so as to cover the upper surface of the wireless communication unit; and a resin layer is formed so as to cover a soldered portion of an electronic element that is mounted in a region of the circuit board other than the rubber sheet member. The rubber sheet member is provided with a notch so as to expose the antenna wire portion to the outside.
    Type: Application
    Filed: May 15, 2020
    Publication date: July 14, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Toshiaki Masumori, Satoshi Yamaguchi, Hiroyuki Hanawa
  • Patent number: 11367907
    Abstract: 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: Grant
    Filed: May 30, 2018
    Date of Patent: June 21, 2022
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Yasushi Nakano, Satoshi Yamaguchi, Hiroyuki Hanawa, Kazuhiko Funabashi, Tomomasa Nishikawa, Shota Kanno, Toshio Mizoguchi, Takuya Teranishi
  • Publication number: 20220094178
    Abstract: The battery pack includes: a battery cell group; a control unit; and a battery-side LD terminal The battery-side LD terminal common to the output of a charging prohibition signal and the output of a discharging prohibition signal is used. When charging is performed, the control unit does not output, to the battery-side LD terminal, the result of determining whether the battery cell group is in a discharging prohibition state or not, but outputs, to the battery-side LD terminal, the result of determining whether the battery cell group is in a charging prohibition state or not. Otherwise, the control unit does not output, to the battery-side LD terminal, the result of determining whether the battery cell group is in the charging prohibition state or not, but outputs, to the battery-side LD terminal, the result of determining whether the battery cell group is in the discharging prohibition state or not.
    Type: Application
    Filed: October 25, 2019
    Publication date: March 24, 2022
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Satoshi YAMAGUCHI, Satoshi YOSHIKAWA, Hiroyuki HANAWA, Kazuhiko FUNABASHI
  • Patent number: 11229997
    Abstract: In order to provide a working machine capable of suppressing an increase in size, a working machine that rotates a working tool with motive power of a motor includes a transmission mechanism that transmits a rotational force of the motor to the working tool, a front case in which the transmission mechanism is disposed, a holding tool that is attached to the front case so as to protrude from an outer surface of the case and is gripped by a worker, and an attaching hole which is provided in the front case and to which the holding tool is attached, and the attaching hole penetrates the front case in plan view intersecting with an axis that is a rotation center of the working tool.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: January 25, 2022
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Shota Hirano, Hiroyuki Hanawa, Keita Saitou, Naoki Sato
  • Patent number: 11205820
    Abstract: 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: Grant
    Filed: October 27, 2017
    Date of Patent: December 21, 2021
    Assignee: 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
  • Publication number: 20210210793
    Abstract: The present invention maintains compatibility with a power tool having no wireless connection function, and prevents malfunctions due to linked operation. A battery pack that supplies a driving power source to a power tool, said battery pack comprising: a wireless communication unit for communicating wirelessly with an external device; and a control unit that performs a first determination process to determine the state of a wireless communication connection with the external device, wherein when the control unit has determined in the first determination process that wireless communication has been established, the control unit transmits a linking command to the external device, and during a state in which the wireless communication has been established, the control unit can perform a communication connection cancellation process to cancel the wireless communication.
    Type: Application
    Filed: May 29, 2019
    Publication date: July 8, 2021
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Satoshi YAMAGUCHI, Hiroyuki HANAWA, Tatsuya ITO, Kenta HARADA, Hiromi TAKAHASHI
  • Publication number: 20200227931
    Abstract: Provided are a battery pack and an electrical apparatus by which information can be transmitted at an appropriate timing from the battery pack to a device body. A battery pack (10) includes: a serial communication reception circuit (31) and a temperature information transmission circuit (32); an LS terminal that is selectively connected to the serial communication reception circuit (31) or the temperature information transmission circuit (32); a first switching circuit (21) that is provided between the LS terminal and the serial communication reception circuit (31) and the temperature information transmission circuit (32); and a V terminal that is connected to the first switching circuit (21). The first switching circuit (21) switches between connecting the serial communication reception circuit (31) or the temperature information transmission circuit (32) to the LS terminal according to a signal inputted from the V terminal.
    Type: Application
    Filed: July 27, 2018
    Publication date: July 16, 2020
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Satoshi YAMAGUCHI, Yasushi NAKANO, Hiroyuki HANAWA, Kazuhiko FUNABASHI
  • Publication number: 20200212505
    Abstract: 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: Application
    Filed: May 30, 2018
    Publication date: July 2, 2020
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yasushi Nakano, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota KANNO, Toshio Mizoguchi, Takuya Teranishi
  • Publication number: 20200161609
    Abstract: 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: Application
    Filed: June 29, 2018
    Publication date: May 21, 2020
    Applicant: 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
  • Publication number: 20200127339
    Abstract: 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: Application
    Filed: July 24, 2018
    Publication date: April 23, 2020
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yasushi Nakano, Satoshi YAMAGUCHI, Hiroyuki HANAWA, Kazuhiko FUNABASHI, Tomomasa NISHIKAWA, Shota KANNO, Toshio Mizoguchi
  • Publication number: 20190259985
    Abstract: 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: Application
    Filed: October 27, 2017
    Publication date: August 22, 2019
    Applicant: 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
  • Publication number: 20190259984
    Abstract: 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: Application
    Filed: October 27, 2017
    Publication date: August 22, 2019
    Applicant: 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
  • Patent number: 10263228
    Abstract: The sealing property obtained when a battery pack is attached to an electric power tool is improved. An electric power tool to/from which a battery pack retaining a battery cell is attachable/detachable has: a tool main body being provided with an attachment part to/from which the battery pack is attached/detached; a guide groove which is provided in the attachment part and which determines a direction of the attachment/detachment of the battery pack; a device-side terminal which is provided in the attachment part and which is connected to a battery-side terminal provided in the battery pack; and a seal member which is provided in the attachment part and which seals a connecting part between the battery-side terminal and the device-side terminal.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: April 16, 2019
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Tomomasa Nishikawa, Tetsuhiro Harada, Chikai Yoshimizu, Hiroyuki Hanawa
  • Publication number: 20180193996
    Abstract: In order to provide a working machine capable of suppressing an increase in size, a working machine that rotates a working tool with motive power of a motor includes a transmission mechanism that transmits a rotational force of the motor to the working tool, a front case in which the transmission mechanism is disposed, a holding tool that is attached to the front case so as to protrude from an outer surface of the case and is gripped by a worker, and an attaching hole which is provided in the front case and to which the holding tool is attached, and the attaching hole penetrates the front case in plan view intersecting with an axis that is a rotation center of the working tool.
    Type: Application
    Filed: June 2, 2016
    Publication date: July 12, 2018
    Inventors: Shota HIRANO, Hiroyuki HANAWA, Keita SAITOU, Naoki SATO
  • Patent number: 9748534
    Abstract: When a battery pack is mounted to a battery attachment part, the battery pack is slid in a horizontal direction (a direction substantially perpendicular to an upper-lower direction) with respect to the housing, e.g., along a long longitudinal direction of a battery-side rail part, such that tool-side rail parts of the battery attachment part are introduced into engaging recess portions of the battery pack. Thereby, the elastic members are fitted and compressed in the battery-side rail parts and the tool-side rail parts, so that the elastic members press upwards the battery-side rail part (e.g., the battery pack) and press downwards the tool-side rail parts (e.g., the housing). That is, the elastic members press the battery pack and the housing such that they come close to each other.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: August 29, 2017
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Hiroyuki Hanawa, Shota Takeuchi, Yoshihiro Nakano, Itsushi Ogawa, Kousei Yokoyama
  • Patent number: 9236588
    Abstract: A battery pack includes a case having an upper case part and a lower case part. The battery pack further includes a battery cell accommodated inside the case, and a plurality of electrode terminals electrically connected to the battery cell. The upper case part has an opening which is arranged at a position corresponding to a position of the plurality of electrode terminals and exposes the plurality of electrode terminals. The batter pack additionally includes a suppressing member that suppresses foreign matter from entering inside the case via the opening.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: January 12, 2016
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Haruhisa Fujisawa, Keita Saitou
  • Publication number: 20150214520
    Abstract: The sealing property obtained when a battery pack is attached to an electric power tool is improved. An electric power tool to/from which a battery pack retaining a battery cell is attachable/detachable has: a tool main body being provided with an attachment part to/from which the battery pack is attached/detached; a guide groove which is provided in the attachment part and which determines a direction of the attachment/detachment of the battery pack; a device-side terminal which is provided in the attachment part and which is connected to a battery-side terminal provided in the battery pack; and a seal member which is provided in the attachment part and which seals a connecting part between the battery-side terminal and the device-side terminal.
    Type: Application
    Filed: July 16, 2013
    Publication date: July 30, 2015
    Inventors: Tomomasa Nishikawa, Tetsuhiro Harada, Chikai Yoshimizu, Hiroyuki Hanawa
  • Publication number: 20150075831
    Abstract: A battery pack includes a case having an upper case part and a lower case part. The battery pack further includes a battery cell accommodated inside the case, and a plurality of electrode terminals electrically connected to the battery cell. The upper case part has an opening which is arranged at a position corresponding to a position of the plurality of electrode terminals and exposes the plurality of electrode terminals. The batter pack additionally includes a suppressing member that suppresses foreign matter from entering inside the case via the opening.
    Type: Application
    Filed: November 21, 2014
    Publication date: March 19, 2015
    Inventors: Hiroyuki Hanawa, Haruhisa Fujisawa, Keita Saitou
  • Patent number: 8895182
    Abstract: According to an aspect of the present invention, there is provided a battery pack to be inserted and attached to a power tool, including: a case; a battery cell accommodated inside the case; and an electrode terminal connected to the battery cell and provided on the case so as to be connectable to a tool-side electrode terminal, wherein the case includes: a case main portion; and a case sub portion which is protruded from the case main portion to be inserted into the power tool, and wherein the electrode terminal is provided on an upper surface of the case main portion at a side of the case sub portion.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: November 25, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Hanawa, Haruhisa Fujisawa, Keita Saitou