公开(公告)号：US20220123565A1

公开(公告)日：2022-04-21

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: H02J7/00 ,  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：US20220367963A1

公开(公告)日：2022-11-17

申请号：US17761535

申请日：2020-09-24

Applicant: MAKITA CORPORATION

Inventor： Tatsuya NAGAHAMA ,  Minoru GYODA

IPC: H01M50/296 ,  H01M50/213 ,  H01M50/247 ,  H01M50/284 ,  H01M50/24

Abstract: A battery pack may include a battery cell; a control board disposed above the battery cell and connected to the battery cell; a plurality of terminals disposed on the control board and disposed side by side in a left-right direction; a plurality of partition wall disposed on the control board; and an outer case housing the battery cell, the control board, the plurality of terminals, and the plurality of partition walls, and having an upper surface comprising a terminal reception part configured to receive a terminal of the power tool. The plurality of terminals may include a first terminal and a second terminal adjacent to the first terminal in the left-right direction. At least two of the partition walls are disposed between the first terminal and the second terminal.

公开(公告)号：US20250007314A1

公开(公告)日：2025-01-02

申请号：US18750417

申请日：2024-06-21

Applicant: MAKITA CORPORATION

Inventor： Minoru GYODA

IPC: H02J7/00

Abstract: The battery pack for an electric work machine in one aspect of the present disclosure includes a battery, an attachment port, a current path, at least one fuse, a temperature detector, and a control circuit. The battery includes a positive electrode and a negative electrode. The attachment port is detachably attached to the electric work machine. The current path is coupled to the positive electrode or the negative electrode. The current path delivers a discharge current from the battery to the electric work machine. The at least one fuse is on the current path. The temperature detector outputs a temperature signal indicating a fuse temperature. The control circuit reduces or stops the discharge current based on the fuse temperature having satisfied or satisfying a discharge inhibition requirement.

公开(公告)号：US20210305661A1

公开(公告)日：2021-09-30

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 ,  H01M10/42 ,  H01M10/6235

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：US20240014671A1

公开(公告)日：2024-01-11

申请号：US18372205

申请日：2023-09-25

Applicant: MAKITA CORPORATION

Inventor： Minoru GYODA ,  Hitoshi SUZUKI ,  Motohiro OMURA

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

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

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：US20200381930A1

公开(公告)日：2020-12-03

申请号：US16868055

申请日：2020-05-06

Applicant: MAKITA CORPORATION

Inventor： Hayato KANO ,  Toru YAMADA ,  Minoru GYODA

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

Abstract: A battery pack (60), which is rechargeable by a charger (600), includes one or more battery cells (60), a control part (620), a communication part (620, 400, 15), and a switching-control part (620). The control part is configured to be switchable to any of a plurality of operation states, including a controlled-operation state and a low-power operation state. The switching-control part: compares a communication-stop time (Ta1) to a state-switching determination value (Tth1); does not switch the operation state of the control part if the communication-stop time is less than or equal to the state-switching determination value; and does switch the operation state of the control part to the low-power operation state if the communication-stop time exceeds the state-switching determination value, whereby power consumption of the control part can be reduced upon completion, e.g., of a charging operation.