公开(公告)号：US10784676B2

公开(公告)日：2020-09-22

申请号：US16181449

申请日：2018-11-06

Applicant: MAKITA CORPORATION

Inventor： Hiroki Uesugi ,  Takuya Umemura ,  Takayoshi Endo ,  Masafumi Noda

IPC: H02H7/18 ,  H02J7/00 ,  H02H3/04 ,  H02H3/05

Abstract: An electrically-driven working apparatus in one aspect of an embodiment of the present disclosure comprises: a battery; an abnormality detection unit; a power supply path; a first disconnection unit; a second disconnection unit; and a control unit. The control unit activates the first disconnection unit to disconnect the power supply path if either of an overload or an over discharge of the battery is detected by the abnormality detection unit, and subsequently determines whether discharge from the battery has stopped after activating the first disconnection unit, and activates the second disconnection unit to disconnect the power supply path if discharge from the battery has not stopped.

公开(公告)号：US10298044B2

公开(公告)日：2019-05-21

申请号：US15170488

申请日：2016-06-01

Applicant: MAKITA CORPORATION

Inventor： Takaaki Ito ,  Takuya Umemura

IPC: H01M10/44 ,  H01M10/46 ,  H02J7/00 ,  B25F5/00 ,  G01R31/36

Abstract: A device body in one aspect of the present disclosure comprises a motor, a current path, a positive terminal, a negative terminal, a device-side signal terminal, a temperature information detector, a current detector, and a correction unit. The correction unit is configured to correct temperature information based on a current value of a conducting current, so as to reduce an influence given to the temperature information by the conducting current.

公开(公告)号：US09819203B2

公开(公告)日：2017-11-14

申请号：US15377034

申请日：2016-12-13

Applicant: MAKITA CORPORATION

Inventor： Hitoshi Suzuki ,  Takuya Umemura

IPC: H02J7/00 ,  H01M10/46 ,  H01M10/0525 ,  H01M2/10

CPC classification number: H02J7/0027 ,  H01M2/1022 ,  H01M2/1055 ,  H01M10/0525 ,  H01M10/441 ,  H01M10/46 ,  H01M2220/30 ,  H02J5/00 ,  H02J7/0044 ,  H02J7/0045 ,  H02J7/0054 ,  H02J7/02 ,  H02J7/025 ,  H02J50/10

Abstract: An electric power tool system comprises a tool main body, a battery pack detachably attached to the tool main body, and a first charger that charges the battery pack. The first charger comprises a rechargeable battery that supplies current to at least one rechargeable battery of the battery pack. The at least one rechargeable battery of the first charger preferably has a larger charge storage capacity than the at least one rechargeable battery of the battery pack.

公开(公告)号：US09786877B2

公开(公告)日：2017-10-10

申请号：US14695560

申请日：2015-04-24

Applicant: MAKITA CORPORATION

Inventor： Takuya Umemura ,  Masaaki Fukumoto ,  Masafumi Noda

IPC: H02J7/00 ,  H01M2/10 ,  H01M10/0525

CPC classification number: H01M2/1055 ,  B25F5/02 ,  H01M2/1022 ,  H01M10/0525 ,  H01M2220/30 ,  Y02E60/122

Abstract: A battery pack of an electric power tool comprises ten lithium-ion cells. The ten lithium-ion cells are connected in series. Each lithium-ion cell has a diameter equal to or less than 18 millimeters, a length equal to or less than 65 millimeters, and an internal resistance equal to or less than 30 milliohms. Because the battery pack has a high voltage in operation and is therefore able to supply large current, the battery pack is preferably configured incapable of being used in a conventional electric power tool that cannot operate under such a large current.

公开(公告)号：US09784795B2

公开(公告)日：2017-10-10

申请号：US14741788

申请日：2015-06-17

Applicant: MAKITA CORPORATION

Inventor： Takuya Umemura ,  Tadahiko Kobayakawa ,  Hitoshi Suzuki

IPC: H01M10/46 ,  G01R31/36 ,  H02J7/00 ,  G01K13/00 ,  H02J7/04

CPC classification number: G01R31/3606 ,  G01K13/00 ,  H02J7/0004 ,  H02J7/0008 ,  H02J7/0011 ,  H02J7/0021 ,  H02J7/0044 ,  H02J7/0073 ,  H02J7/0075 ,  H02J7/041 ,  H02J7/047 ,  H02J2007/0067

Abstract: A charge control device of one example of the present invention comprises a temperature detection unit, a storage unit, and an upper limit setting unit. The storage unit stores a reference current characteristic and at least one of a first current characteristic and a second current characteristic as a charging current characteristic, and stores a reference voltage characteristic and at least one of a first voltage characteristic and a second voltage characteristic as a charging voltage characteristic. The upper limit setting unit selects a characteristic used to set upper limits of a charging current and a charging voltage to the battery from among a plurality of the charging current characteristics and a plurality of the charging voltage characteristics stored in the storage unit.

公开(公告)号：US09778321B2

公开(公告)日：2017-10-03

申请号：US14556698

申请日：2014-12-01

Applicant: MAKITA CORPORATION

Inventor： Takuya Umemura ,  Tadahiko Kobayakawa ,  Hiroki Uesugi ,  Hiroshi Hanai

IPC: H02J7/00 ,  H02J7/04 ,  H02J7/16 ,  G01R31/36 ,  H01M10/44 ,  H01M10/48 ,  H01M10/0525

CPC classification number: G01R31/3606 ,  H01M10/0525 ,  H01M10/443 ,  H01M10/48 ,  H01M10/486 ,  H02J7/0031 ,  H02J7/0052 ,  H02J7/007 ,  H02J7/008 ,  H02J7/0091

Abstract: A charge control device includes a voltage detector that detects a voltage of a battery, a temperature detector that detects a battery temperature, a voltage setting unit that sets at least one of a charge completion voltage and an abnormality determination voltage to a high temperature time voltage that is lower than a normal voltage when the battery temperature detected by the temperature detector is or is above a high temperature determination threshold set in advance, and a charging current limiting unit that reduces a charging current a charger supplies to the battery when the battery temperature is in a temperature range between a set temperature that is lower by a predetermined temperature than the high temperature determination threshold and the high temperature determination threshold and the battery voltage detected by the voltage detector is in a voltage range between the normal voltage and the high temperature time voltage.

公开(公告)号：US09606188B2

公开(公告)日：2017-03-28

申请号：US13939485

申请日：2013-07-11

Applicant: MAKITA CORPORATION

Inventor： Masafumi Noda ,  Hitoshi Suzuki ,  Masaaki Fukumoto ,  Takuya Umemura

IPC: G01R31/36 ,  H02J7/00

CPC classification number: G01R31/3648 ,  G01R31/3606 ,  H02J7/0004 ,  H02J7/0021 ,  H02J2007/0096 ,  H02J2007/0098

Abstract: A measurement system according to one aspect of the present invention includes a battery pack and at least one type of connected device to which the pack is connected. The pack includes a first detection device detecting a predetermined physical quantity in the pack and having a predetermined measurement range. The connected device includes a second detection device detecting a physical quantity the same as the predetermined physical quantity and having a measurement range different from the range of the first detection device. One of the pack and the connected device includes a receiving device and a measurement processing device that performs a predetermined measurement process by using one of: a detection-value-related information received by the receiving device; and a detection result by one device of the first detection device and the second detection device, the one device being provided in one of the pack and the connected device.

公开(公告)号：US11276887B2

公开(公告)日：2022-03-15

申请号：US16591801

申请日：2019-10-03

Applicant: MAKITA CORPORATION

Inventor： Takuya Umemura ,  Takayoshi Endo ,  Hironori Kandori

IPC: H02J7/00 ,  H01M10/42

Abstract: A power supplier in one aspect of the present disclosure includes an outputter, a first pack parallel coupler, a second pack parallel coupler, an output voltage switch, and a controller. Each of the first pack parallel coupler and the second pack parallel coupler includes pack couplers. The pack couplers are configured to be coupled by battery packs. The output voltage switch is configured to switch an electrical coupling state between the second pack parallel coupler and the outputter. The controller is configured to determine an output mode of the outputter. The output mode corresponds to a magnitude of voltage to be outputted from outputter. The controller is configured to control the output voltage switch based on a result of determination.

公开(公告)号：US20200343744A1

公开(公告)日：2020-10-29

申请号：US16923347

申请日：2020-07-08

Applicant: MAKITA CORPORATION

Inventor： Nobuyasu Furui ,  Hitoshi Suzuki ,  Masaaki Fukumoto ,  Takuya Umemura ,  Kosuke Ito ,  Hitoshi Sengiku ,  Shuji Yoshikawa ,  Tatsuya Nagahama

IPC: H02J7/00 ,  B25F5/02 ,  B25F3/00 ,  B25F5/00 ,  G05B13/02 ,  G08C17/02

Abstract: A power tool system includes a hand-held power tool having a power tool housing accommodating a motor, and a battery pack interface electrically connected to the motor within the power tool housing. A battery pack includes a battery pack housing accommodating at least one battery cell and a power tool interface electrically connected to the at least one battery cell within the battery pack housing. The power tool interface is configured to be physically and electrically connected to and disconnected from the battery pack interface of the power tool. A wireless communicator is attached to or accommodated within the battery pack housing. The wireless communicator is configured to wirelessly communicate with an external device using radio waves while the power tool interface of the battery pack is physically and electrically connected to the battery pack interface of the hand-held power tool.

公开(公告)号：US09941553B2

公开(公告)日：2018-04-10

申请号：US15044593

申请日：2016-02-16

Applicant: MAKITA CORPORATION

Inventor： Takuya Umemura ,  Shunpei Yamaji

IPC: H02J7/04 ,  H02J7/16 ,  H01M10/44 ,  H02J7/00 ,  H01M10/48

CPC classification number: H01M10/443 ,  H01M10/486 ,  H02J7/0029 ,  H02J7/007 ,  H02J7/0091

Abstract: A battery-connection system in one aspect of the present disclosure comprises a battery pack and a connecting device. The connecting device comprises a temperature-related control unit that is configured to execute a specific temperature-related control in accordance with a detection signal outputted from the battery pack when the battery pack is attached to the connecting device, without identifying a type of a battery in the battery pack.