公开(公告)号：US11811249B2

公开(公告)日：2023-11-07

申请号：US16890518

申请日：2020-06-02

Applicant: MAKITA CORPORATION

Inventor： Minoru Gyoda ,  Hitoshi Suzuki ,  Motohiro Omura

IPC: H02J7/00 ,  B25F5/00 ,  H01M50/574

CPC classification number: H02J7/00306 ,  B25F5/00 ,  H01M50/574 ,  H02J7/0063

Abstract: A battery-powered system includes a battery pack (10; 71; 81) connected to an electrical equipment (30; 50; 76; 86). The battery pack includes a first positive electrode terminal (11), a first negative electrode terminal (12), a first communication terminal (13), a first data input circuit (23), and a first limiting circuit (D11; D72; D82) that limits a flow of electric current in a direction from the first negative electrode terminal to the first communication terminal via the first data input circuit. The connected equipment includes a second positive electrode terminal (31; 51), a second negative electrode terminal (32; 52), a second communication terminal (33; 53), a second data input circuit (43; 63; 77; 87), and a second limiting circuit (D31; D51; D77; D87) that limits a flow of electric current in a direction from the second negative electrode terminal to the second communication terminal via the second data input circuit.

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：US11616276B2

公开(公告)日：2023-03-28

申请号：US17205079

申请日：2021-03-18

Applicant: MAKITA CORPORATION

Inventor： Minoru Gyoda

IPC: H01M50/519 ,  H01M10/46 ,  H01M10/655 ,  H01M10/653 ,  H01M50/522 ,  H01M10/6235 ,  H01M10/42 ,  H02J7/00

Abstract: A battery pack may include a battery (60), a board (10), a first connection terminal (12), a second connection terminal (11), a control circuit (620), and a busbar (18). The first connection terminal is provided on the board and is configured to be connected to an electric work machine (500). The second connection terminal is provided on the board and is connected to the battery. The control circuit is provided on the board and is configured to control discharging of the battery. The busbar is provided on the board in a current discharge path between the first connection terminal and the second connection terminal.

公开(公告)号：US11482764B2

公开(公告)日：2022-10-25

申请号：US16587464

申请日：2019-09-30

Applicant: MAKITA CORPORATION

Inventor： Hitoshi Suzuki ,  Minoru Gyoda ,  Nobuyuki Oyama ,  Hiroshi Inoue

IPC: H01M10/46 ,  H01M50/572 ,  H01M10/44 ,  H02J7/00 ,  H01M50/20

Abstract: A battery pack in one aspect of the present disclosure includes a communication terminal and a detector, and supplies electric power to an external device. The communication terminal receives a first signal, a second signal, and a third signal. The first signal has a first potential, the second signal has a second potential, and the third signal has a third potential. The first potential, the second potential, and the third potential are different from one another. The detector determines a potential at the communication terminal, to thereby detect the first signal, the second signal, or the third signal in accordance with the determined potential.

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.