公开(公告)号：US11876190B2

公开(公告)日：2024-01-16

申请号：US17022193

申请日：2020-09-16

Applicant: MAKITA CORPORATION

Inventor： Tadahiko Kobayakawa ,  Hiroki Uesugi ,  Hayato Kano

IPC: H01M10/42 ,  H01M10/44 ,  H01M10/48 ,  G01R31/3828

CPC classification number: H01M10/425 ,  G01R31/3828 ,  H01M10/44 ,  H01M10/486 ,  H01M2010/4278

Abstract: A battery pack in one aspect of the present disclosure includes a battery and a controller provided with a counter value. During discharge of the battery pack, the controller calculates an addition value in accordance with a total number of use of the battery pack under a specified condition. The controller updates the counter value by adding the addition value. The controller prohibits the discharge of the battery pack in response to the counter value reaching a protection threshold.

公开(公告)号：US12057719B2

公开(公告)日：2024-08-06

申请号：US17275504

申请日：2019-09-12

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka Ichikawa ,  Akihiro Nakamoto ,  Minoru Gyoda ,  Hayato Kano ,  Toru Yamada ,  Hitoshi Suzuki

IPC: H02P1/00 ,  H01M10/48 ,  H02J7/00 ,  H02P3/00 ,  H02P3/06 ,  H02P5/00

CPC classification number: H02J7/0029 ,  H01M10/48 ,  H02J7/00032 ,  H02J7/0063 ,  H02P3/06

Abstract: A battery pack is configured to supply electric power to an electric work machine, such as a power tool or outdoor power equipment. The battery pack includes a first battery-signal terminal and a second battery-signal terminal. The first battery-signal terminal outputs, to the electric work machine, a first signal indicating that discharging is to be prohibited or permitted. The second battery-signal terminal outputs, to the electric work machine, a second signal indicating that discharging is to be prohibited or permitted. Thus, two communication paths are provided for transmitting signals to permit or prohibit discharging of the battery pack.

公开(公告)号：US11192231B2

公开(公告)日：2021-12-07

申请号：US16618853

申请日：2018-05-22

Applicant: MAKITA CORPORATION

Inventor： Hayato Kano ,  Akihiro Yamada ,  Hiroki Kaneko

IPC: B25F5/02 ,  H02J1/00 ,  A41D19/00 ,  A41D1/00 ,  A41D1/02

Abstract: A power supply system includes a wearing part worn on a hand of a worker, a connecting member held by the wearing part, and a control circuit. The connecting member is disposed at a position where it is attached to a tool-side attachment part provided on a grip of a power tool when the worker grips the grip. The connecting member includes, in an exposed manner, a power source terminal that supplies electric power to the power tool and a signal terminal that receives a response signal from the power tool, which are electrically connected to the power tool in an attached state where the connecting member is attached to the tool-side attachment part. The control circuit makes the power source terminal and a power source unit electrically continuous when the signal terminal receives the response signal and makes them electrically discontinuous when the signal terminal receives no response signal.

公开(公告)号：US12191684B2

公开(公告)日：2025-01-07

申请号：US18126584

申请日：2023-03-27

Applicant: MAKITA CORPORATION

Inventor： Tadahiko Kobayakawa ,  Hayato Kano ,  Yoshitaka Ichikawa

IPC: H02J7/00 ,  A01D34/78 ,  A01D34/90 ,  A01D101/00 ,  H01M10/42 ,  H01M10/46 ,  H01M10/48 ,  H02P23/14

Abstract: A system in one aspect of the present disclosure includes a battery pack and an electric work machine. The battery pack includes a battery, a first interface, a first memory and a first controller. The first controller is configured to transmit battery data identifying a type of the battery pack. The electric work machine includes a motor, a second interface, a switching element, a manual switch, a second memory and a second controller. The second controller is configured to transmit electric apparatus data identifying a type of the electric work machine.

公开(公告)号：US12184112B2

公开(公告)日：2024-12-31

申请号：US17547882

申请日：2021-12-10

Applicant: MAKITA CORPORATION

Inventor： Tomoki Hori ,  Hayato Kano

IPC: H02J7/00 ,  H01M10/42 ,  H01M10/44 ,  H01M10/46 ,  H01M10/48

Abstract: A battery pack includes an attaching portion, a battery, a voltage detection circuit, a current acquisition circuit, a next current calculation circuit, a first charging stop circuit, and a second charging stop circuit. The attaching portion is electrically and mechanically connected to the battery charger. The first charging stop circuit stops charging of the battery in response to a first condition being satisfied. The second charging stop circuit stops the charging of the battery in response to a second condition different from the first condition being satisfied.

公开(公告)号：US12021399B2

公开(公告)日：2024-06-25

申请号：US16868055

申请日：2020-05-06

Applicant: MAKITA CORPORATION

Inventor： Hayato Kano ,  Toru Yamada ,  Minoru Gyoda

IPC: H01M10/42 ,  H01M10/44 ,  H01M10/46 ,  H02J7/00

CPC classification number: H02J7/00036 ,  H01M10/425 ,  H01M10/44 ,  H01M10/46 ,  H02J7/0013 ,  H02J7/0071 ,  H01M2010/4271 ,  H01M2010/4278

Abstract: A battery pack includes one or more battery cells, a control circuit, a communication circuit, and a switching control circuit. The switching control circuit is configured to switch the control circuit from a controlled-operation state to a low-power operation state in response to a communication-stop time exceeding a state-switching threshold, the communication-stop time being a duration of a state in which the control circuit or the communication circuit detects no communication with the charger, and the state-switching threshold being determined in advance, so that power consumption of the control circuit can be reduced upon completion of a charging operation.