GB2420031A - Battery pack for a cordless power tool - Google Patents

Battery pack for a cordless power tool Download PDF

Info

Publication number
GB2420031A
GB2420031A GB0601876A GB0601876A GB2420031A GB 2420031 A GB2420031 A GB 2420031A GB 0601876 A GB0601876 A GB 0601876A GB 0601876 A GB0601876 A GB 0601876A GB 2420031 A GB2420031 A GB 2420031A
Authority
GB
United Kingdom
Prior art keywords
battery pack
battery
cell
cells
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB0601876A
Other languages
English (en)
Other versions
GB0601876D0 (en
Inventor
David A Hempe
Jeffrey M Zeiler
Kevin Glasgow
Jay J Rosenbecker
Karl F Scheucher
Gary D Meyer
Todd W Johnson
Dennis J Grzybowski
Mark Alan Kubale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Milwaukee Electric Tool Corp
Original Assignee
Milwaukee Electric Tool Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34624153&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=GB2420031(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US10/720,027 external-priority patent/US7157882B2/en
Priority claimed from US10/719,680 external-priority patent/US7176654B2/en
Priority claimed from US10/721,800 external-priority patent/US7253585B2/en
Application filed by Milwaukee Electric Tool Corp filed Critical Milwaukee Electric Tool Corp
Priority claimed from GB0414283A external-priority patent/GB2408396A/en
Publication of GB0601876D0 publication Critical patent/GB0601876D0/en
Publication of GB2420031A publication Critical patent/GB2420031A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D45/00Sawing machines or sawing devices with circular saw blades or with friction saw discs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D47/00Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25FCOMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44Methods for charging or discharging
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/58Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00Primary cells; Manufacture thereof
    • H01M6/50Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J5/00Circuit arrangements for transfer of electric power between ac networks and dc networks
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/36Accumulators not provided for in groups H01M10/05-H01M10/34
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271Lids or covers for the racks or secondary casings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/00032Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • H02J7/00038Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors
    • H02J7/0006
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014Circuits for equalisation of charge between batteries
    • H02J7/0021
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Battery Mounting, Suspending (AREA)
  • Portable Power Tools In General (AREA)
  • Battery Electrode And Active Subsutance (AREA)
GB0601876A 2003-11-19 2004-06-23 Battery pack for a cordless power tool Withdrawn GB2420031A (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US52371203P 2003-11-19 2003-11-19
US52371603P 2003-11-19 2003-11-19
US10/720,027 US7157882B2 (en) 2002-11-22 2003-11-20 Method and system for battery protection employing a selectively-actuated switch
US10/719,680 US7176654B2 (en) 2002-11-22 2003-11-20 Method and system of charging multi-cell lithium-based batteries
US10/721,800 US7253585B2 (en) 2002-11-22 2003-11-24 Battery pack
US57427804P 2004-05-24 2004-05-24
US57461604P 2004-05-25 2004-05-25
GB0414283A GB2408396A (en) 2003-11-19 2004-06-23 Battery pack and charge equaliser

Publications (2)

Publication Number Publication Date
GB0601876D0 GB0601876D0 (en) 2006-03-08
GB2420031A true GB2420031A (en) 2006-05-10

Family

ID=34624153

Family Applications (6)

Application Number Title Priority Date Filing Date
GB0601876A Withdrawn GB2420031A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool
GB0601841A Withdrawn GB2420027A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool
GB0601879A Withdrawn GB2420032A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool
GB0601844A Withdrawn GB2420028A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool
GB0601873A Withdrawn GB2420030A (en) 2003-11-19 2004-06-23 Battey pack for a cordless power tool
GB0601872A Withdrawn GB2420029A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool

Family Applications After (5)

Application Number Title Priority Date Filing Date
GB0601841A Withdrawn GB2420027A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool
GB0601879A Withdrawn GB2420032A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool
GB0601844A Withdrawn GB2420028A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool
GB0601873A Withdrawn GB2420030A (en) 2003-11-19 2004-06-23 Battey pack for a cordless power tool
GB0601872A Withdrawn GB2420029A (en) 2003-11-19 2004-06-23 Battery pack for a cordless power tool

Country Status (4)

Country Link
JP (17) JP4624012B2 (ja)
CN (1) CN1619876B (ja)
DE (1) DE102004030037B4 (ja)
GB (6) GB2420031A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8283889B2 (en) 2006-09-11 2012-10-09 Robert Bosch Gmbh Charging device with an interchangeable battery for a power tool
EP3132730B1 (en) 2008-10-16 2019-10-16 Royal Appliance Mfg. Co. Battery powered cordless cleaning system

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* Cited by examiner, † Cited by third party
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JP4998846B2 (ja) * 2007-01-18 2012-08-15 日立工機株式会社 コードレス電動工具
JP4922031B2 (ja) * 2007-03-19 2012-04-25 日立工機株式会社 携帯用工具
JP2008236881A (ja) * 2007-03-19 2008-10-02 Hitachi Koki Co Ltd 充電器
JP5370709B2 (ja) 2007-10-29 2013-12-18 日立工機株式会社 電池パック及びこれを備えた電動工具
JP4104648B1 (ja) * 2007-09-13 2008-06-18 和征 榊原 電池パック
CN104103851B (zh) * 2007-09-14 2018-10-09 A123系统有限责任公司 具有用于健康状态监视的参考电极的锂可再充电电池
JP2009289578A (ja) 2008-05-29 2009-12-10 Makita Corp 電動工具のバッテリパック
JP2010040226A (ja) * 2008-08-01 2010-02-18 Hitachi Koki Co Ltd 電動工具用電池パック
JP5365108B2 (ja) 2008-09-04 2013-12-11 ミツミ電機株式会社 半導体集積回路
CN105206791A (zh) 2008-11-07 2015-12-30 Sakti3有限公司 一体式结构中的多个电化学和聚能组件的制造方法和结构
JP5436850B2 (ja) * 2008-12-19 2014-03-05 株式会社マキタ 電動工具のバッテリパック
WO2010088244A1 (en) * 2009-01-27 2010-08-05 Techtronic Power Tools Technology Limited Battery pack with high and low current discharge terminals
KR20120003432A (ko) * 2009-03-31 2012-01-10 산요덴키가부시키가이샤 전지 모듈, 배터리 시스템 및 전동 차량
JP2011163847A (ja) * 2010-02-08 2011-08-25 Denso Corp 電池電圧監視装置
JP5461221B2 (ja) 2010-02-12 2014-04-02 株式会社マキタ 複数のバッテリパックを電源とする電動工具
JP5567956B2 (ja) * 2010-09-16 2014-08-06 矢崎総業株式会社 複数組電池のセル電圧均等化装置
JP5579046B2 (ja) 2010-12-27 2014-08-27 株式会社マキタ 電動工具用装置
JP2012183611A (ja) * 2011-03-07 2012-09-27 Makita Corp 複数の二次電池セルを電源とする電動工具
US20130026990A1 (en) * 2011-07-27 2013-01-31 Joy Ride Technology Co., Ltd. Charge system for series connected rechargeable batteries
DE102011086799A1 (de) 2011-11-22 2013-05-23 Robert Bosch Gmbh System mit einem Handwerkzeugkoffer und einem Handwerkzeugakku
JP2015028839A (ja) * 2011-11-25 2015-02-12 三洋電機株式会社 電池パック
KR101897822B1 (ko) * 2011-12-02 2018-09-13 삼성에스디아이 주식회사 배터리 팩
JP2014050234A (ja) * 2012-08-31 2014-03-17 Hitachi Koki Co Ltd 電源装置
JP6098117B2 (ja) 2012-10-31 2017-03-22 日立工機株式会社 携帯用工具
JP5605588B2 (ja) * 2012-12-21 2014-10-15 日立工機株式会社 電池パック及びこれを備えた電動工具
JP2014148017A (ja) * 2013-02-01 2014-08-21 Makita Corp 手持式電動切削機
JP2014148018A (ja) * 2013-02-01 2014-08-21 Makita Corp 手持式電動研磨機
JP6133103B2 (ja) * 2013-04-04 2017-05-24 株式会社マキタ 電動工具用電池パック
KR101529551B1 (ko) * 2013-08-12 2015-06-19 주식회사 아이티엠반도체 이차전지 착탈형 배터리 보호장치
JP6103238B2 (ja) * 2013-10-24 2017-03-29 株式会社豊田自動織機 電池パック
JP6103237B2 (ja) * 2013-10-24 2017-03-29 株式会社豊田自動織機 電池パック
JP2014100785A (ja) * 2014-01-15 2014-06-05 Makita Corp 複数のバッテリパックを電源とする電動工具
GB201403971D0 (en) * 2014-03-06 2014-04-23 7Rdd Ltd Portable power supply improvements
US20170047618A1 (en) * 2014-04-30 2017-02-16 Hitachi Koki Co., Ltd. Cell pack, charging device and electric tool
EP3427901B1 (en) * 2014-05-18 2020-03-11 Black & Decker, Inc. Convertible battery pack for power tool
JP6282546B2 (ja) * 2014-07-11 2018-02-21 株式会社マキタ 電動工具
JP6514866B2 (ja) * 2014-08-29 2019-05-15 株式会社マキタ 充電式電気機器
KR102316436B1 (ko) * 2014-11-17 2021-10-22 삼성전자주식회사 이종의 배터리 셀을 제어하기 위한 방법 및 그 전자 장치
CN104362370A (zh) * 2014-11-25 2015-02-18 上海动力储能电池系统工程技术有限公司 一种锰酸锂锂离子电池及其制备方法
ES2830324T3 (es) * 2015-04-03 2021-06-03 Conmed Corp Herramienta manual quirúrgica motorizada a batería tolerante a autoclave
CN104868571A (zh) * 2015-05-24 2015-08-26 中煤张家口煤矿机械有限责任公司 电池专用充电器
JP6686341B2 (ja) * 2015-09-18 2020-04-22 マックス株式会社 充電式工具
JP6730418B2 (ja) * 2016-02-16 2020-07-29 株式会社マキタ 電動作業機
DE102016203429A1 (de) * 2016-03-02 2017-09-07 Robert Bosch Gmbh Akkupack für eine Handwerkzeugmaschine
JP6777912B2 (ja) 2016-10-07 2020-10-28 株式会社マキタ バッテリパック及び電動作業機
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JP6706688B2 (ja) * 2016-11-30 2020-06-10 日立オートモティブシステムズ株式会社 電池制御装置
KR101970102B1 (ko) * 2018-02-20 2019-08-13 프레스토라이트아시아 주식회사 모터 제어 시스템에 사용되는 간단한 구조의 제어 장치
WO2019190996A1 (en) 2018-03-26 2019-10-03 Milwaukee Electric Tool Corporation High-power battery-powered portable power source
US11271415B2 (en) 2018-05-18 2022-03-08 Milwaukee Electric Tool Corporation Portable power source
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USD933010S1 (en) 2019-05-29 2021-10-12 Milwaukee Electric Tool Corporation Portable power source
JP7298309B2 (ja) 2019-05-31 2023-06-27 株式会社Gsユアサ 電圧計測回路、蓄電装置
JP7450203B2 (ja) 2019-08-06 2024-03-15 パナソニックIpマネジメント株式会社 電動工具
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2293060A (en) * 1994-09-09 1996-03-13 Ray O Vac Corp Equalization of charge on series connected cells or batteries
EP0767524A2 (en) * 1995-10-04 1997-04-09 Motorola, Inc. Method for balancing power sources and structure
CA2231260A1 (en) * 1998-03-06 1999-09-06 William G. Dunford Battery equalizer
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