DE102004030037B4 - Accumulator - Google Patents

Accumulator

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Publication number
DE102004030037B4
DE102004030037B4 DE102004030037A DE102004030037A DE102004030037B4 DE 102004030037 B4 DE102004030037 B4 DE 102004030037B4 DE 102004030037 A DE102004030037 A DE 102004030037A DE 102004030037 A DE102004030037 A DE 102004030037A DE 102004030037 B4 DE102004030037 B4 DE 102004030037B4
Authority
DE
Germany
Prior art keywords
accumulator
cells
shown
346a
battery
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.)
Active
Application number
DE102004030037A
Other languages
German (de)
Other versions
DE102004030037A1 (en
Inventor
Kevin L. Glasgow
Dennis J. Grzybowski
David A. Hempe
Todd W. Johnson
Mark A. Kubale
Gary D. Meyer
Jay J. Rosenbecker
Karl F. Scheucher
Jeffrey M. Zeiler
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
Priority to US52371203P priority Critical
Priority to US52371603P priority
Priority to US60/523712 priority
Priority to US60/523716 priority
Priority to US10/720027 priority
Priority to US10/719,680 priority patent/US7176654B2/en
Priority to US10/720,027 priority patent/US7157882B2/en
Priority to US10/719680 priority
Priority to US10/721,800 priority patent/US7253585B2/en
Priority to US10/721800 priority
Priority to US60/574278 priority
Priority to US57427804P priority
Priority to US60/574616 priority
Priority to US57461604P priority
Application filed by Milwaukee Electric Tool Corp filed Critical Milwaukee Electric Tool Corp
Publication of DE102004030037A1 publication Critical patent/DE102004030037A1/en
Application granted granted Critical
Publication of DE102004030037B4 publication Critical patent/DE102004030037B4/en
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=DE102004030037(B4) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

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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
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • HELECTRICITY
    • H01BASIC ELECTRIC 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
    • H01BASIC ELECTRIC 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
    • H01BASIC ELECTRIC 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 condition, e.g. level or density of the electrolyte
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2/00Constructional details or processes of manufacture of the non-active parts
    • H01M2/10Mountings; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • HELECTRICITY
    • H01BASIC ELECTRIC 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
    • H01BASIC ELECTRIC 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. 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
    • H01BASIC ELECTRIC 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
    • H01BASIC ELECTRIC 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
    • H01BASIC ELECTRIC 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
    • H02J7/00038
    • 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 for charging several batteries simultaneously or sequentially
    • H02J7/0014Circuits for equalisation of charge between 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
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging several batteries simultaneously or sequentially
    • H02J7/0021Monitoring or indicating circuits
    • 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 or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation
    • Y02E60/122Lithium-ion batteries
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/54Manufacturing of lithium-ion, lead-acid or alkaline secondary batteries
    • 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
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7005Batteries
    • Y02T10/7011Lithium ion battery

Abstract

An accumulator for connection to a power tool (34) or an accumulator charger (38), comprising: an accumulator housing (42); at least three connections, including a positive connection (98), an earth connection (102) and a sensor connection (106), the at least three connections being designed such that they can be connected to corresponding connections of the power tool (34) or of the battery charger (38) are; a plurality of rechargeable battery cells (46a-e; 346a-g) arranged and held within the housing, charges being transferable between the battery cells and the power tool (34) or the battery charger (38); an equalization circuit (459) configured to determine a state of charge imbalance between the battery cells (46a-e; 346a-g) based on a plurality of voltages of the battery cells (46a-e; 346a-g) measured at the same time are detected; and a control circuit (430) which is designed such that it compensates for the state of charge of the battery cells (46a-e; 346a-g) in the event of a state of charge imbalance detected by the compensation circuit (459), the control circuit ...

Description

  • The present invention generally relates to rechargeable batteries and more particularly to power tool accumulators.
  • Typical power tools, such as a cordless power tool, are powered by a rechargeable battery or rechargeable battery. This accumulator can be periodically charged in a compatible accumulator charger.
  • 36 - 38 show an existing accumulator 230 , The existing accumulator 230 contains a housing 242 and at least one rechargeable battery cell 246 (shown in 39 - 40 ) coming from the case 242 is held. In the illustrated construction, the existing accumulator is 230 an 18 V accumulator which (cf. 39 - 40 ) 15 battery cells or accumulator cells 246 containing about 1.2 V connected in series. The accumulator cells 246 are rechargeable battery cells of the chemical type, for example NiCd or NiMH.
  • As in 39 - 40 is shown in the existing accumulator 230 each accumulator cell 246 generally cylindrical and extending along a cell axis 250 parallel to a cylindrical outer cell wall. In the existing accumulator 230 are the cell axes 250 parallel to each other. In the existing accumulator 230 also has every accumulator cell 246 a cell length 252 , about twice the cell diameter 254 equivalent. In the illustrated construction, each battery cell has 246 a length of about forty-six millimeters (46 mm) and a diameter of about twenty-three millimeters (23 mm).
  • The existing accumulator 230 is with (see 12 ) a battery charger 38 connectable and the accumulator charger 38 can be operated such that it the existing accumulator 230 charging. The existing accumulator 230 is connectable to the electrical device, for example with a power tool 34 (shown in 11A ) to the power tool 34 to supply with energy or electricity. As in 36 - 38 is shown represents the housing 242 a support portion 250 for holding the existing accumulator 230 ready on an electrical device. In the illustrated construction, the support portion 250 (see. 36 ) has a C-shaped cross-section provided with a complementary support portion with a T-shaped cross-section on the electrical device (the support portion on the power tool 34 (shown in 11B ) and / or the battery holder portion on the battery charger 38 (shown in 12 )) can be connected.
  • The existing accumulator 230 contains (cf. 36 - 37 and 39 - 40 ) a connection device 286 , which is operable such that the accumulator cell 246 is electrically connected to a circuit in the electrical device. The connection device 286 contains a positive battery connection 298 , a ground connection 302 and a sensor connection 306 , As in 39 - 40 shown are the connections 298 and 302 with the opposite ends of the cell or series of cells 246 connected. The sensor connection 306 is with (cf. 40 ) of an electrical component 314 connected in the circuit of the existing accumulator 230 connected is. In the illustrated construction, the electrical component is 314 a temperature detecting device or a thermistor to the temperature of the existing accumulator 230 and / or the accumulator cells 246 tell.
  • The present invention provides an accumulator that substantially solves one or more independent problems with the above-described and existing accumulators.
  • In addition, in some aspects and in some constructions, the present invention provides an accumulator comprising a plurality of cells, a sensor for detecting the voltage of the first group of the plurality of cells, a sensor for detecting the voltage of a second group of the plurality of cells, and control means for comparing the voltage of the first group with the voltage of the second group to determine whether one of the plurality of cells is at a voltage or below a voltage.
  • In some aspects and in some constructions, the present invention further provides a method of determining a voltage of a cell of a rechargeable battery, wherein the rechargeable battery includes a plurality of cells, and wherein the method comprises the steps of detecting the voltage of a first group of the plurality of cells detecting the voltage of a second group of the plurality of cells and comparing the voltage of the first group with the voltage of the second group to determine whether a cell of the plurality of cells is at or below a voltage.
  • From the DE 689 27 774 T2 a battery pack for a cordless power tool is known, wherein the battery pack is connectable either with the tool or a battery charger for charging. Different groups of battery cells can be assembled in this way that their longitudinal axes do not match. However, in contrast to the present invention, this document mainly deals with the mechanical arrangement of the batteries and the contact terminals within the battery pack, but not with the problem that the individual battery cells could have different output voltages.
  • From the EP 1 076 370 A2 Systems of power tools with cordless tools are known, which are designed so that a rechargeable battery pack can be installed interchangeable. To charge this battery pack, battery chargers are provided. The charger is a separate unit for charging the battery pack when it is removed from the power tool. In addition, an additional converter is provided, which can be connected to the power tool instead of the battery pack and converts the AC voltage into a required low-voltage when the cordless operation is not needed.
  • From the US 6,268,710 B1 a battery pack is known which comprises a plurality of batteries. Further, to the battery pack, a switching device, a capacitor, an overcharge detection circuit, a constant voltage source, an over-discharge detection circuit, a measuring circuit, a microprocessing unit and a switching control circuit are provided. The battery pack is connectable to a load or a battery charger via a positive battery port and a negative battery port. The battery cells are connected to the capacitor either individually or as a group of cells via the switching circuit. The overcharge detection circuit, the over-discharge detection circuit, and / or the measurement circuit then determine the state of the cells based on the charge of the capacitor.
  • From the US 6,229,280 B1 For example, a charging system for an electric tool is known which comprises the tool and a charger with a controller for monitoring the charging or discharging state of the batteries. Data on the charge or discharge state and the battery temperature are transmitted from the tool to the controller and form the basis for a charge status display.
  • Independent features and independent advantages of the invention will become apparent to those skilled in the art upon review of the detailed description and drawings.
  • 1 is a front perspective view of an accumulator;
  • 2 is a rear perspective view of the top of an accumulator, which in 1 is shown;
  • 3 is a perspective, rear view from the bottom of the accumulator, which in 1 is shown;
  • 4 is a top view of the accumulator in 1 is shown;
  • 5 is a bottom view of the accumulator in 1 is shown;
  • 6 is a front view of the accumulator which is in 1 is shown;
  • 7 is a rear view of the accumulator in 1 is shown;
  • 8th is a right side view of the accumulator in 1 is shown;
  • 9 is a left side view of the accumulator which is in 1 is shown;
  • 10 Fig. 10 is a bottom view of an alternative construction of a rechargeable battery embodying the features of the present invention;
  • 11A FIG. 12 is a perspective view of an electrical device, for example a power tool, for use with the accumulator disclosed in FIG 1 is shown;
  • 11B is a perspective view of the support portion of the power tool, which in 11A is shown;
  • 12 FIG. 14 is a perspective view of an electrical device, for example a rechargeable battery charger, for use with the accumulator disclosed in FIG 1 is shown;
  • 13 FIG. 15 is a perspective view of a portion of the accumulator incorporated in FIG 1 and illustrates the battery cells and the battery terminal device;
  • 14 FIG. 11 is a plan view of the battery cells and the battery terminal device incorporated in FIG 13 are shown;
  • 15 FIG. 10 is a bottom view of the battery cells and the battery terminal device incorporated in FIG 13 are shown;
  • 16 FIG. 16 is a front view of the battery cells and the battery terminal device incorporated in FIG 13 are shown;
  • 17 FIG. 12 is a rear view of the battery cells and the battery terminal device incorporated in FIG 13 are shown;
  • 18 FIG. 10 is a right side view of the battery cells and the battery terminal device incorporated in FIG 13 are shown;
  • 19 FIG. 16 is a left side view of the battery cells and the battery terminal device shown in FIG 13 are shown;
  • 20 FIG. 12 is a schematic diagram of components of a storage battery, for example, the storage battery included in FIG 1 is shown;
  • 21 is another schematic diagram of the components of the accumulator;
  • 22 is yet another schematic diagram of components of a rechargeable battery;
  • 23 is yet another schematic diagram of components of a rechargeable battery;
  • 24 FIG. 15 is a perspective view of a portion of the accumulator incorporated in FIG 1 shown with portions removed;
  • 25 FIG. 15 is a perspective view of a portion of the accumulator incorporated in FIG 1 shown with portions removed;
  • 26 FIG. 15 is a perspective view of a portion of the accumulator incorporated in FIG 1 shown with portions removed;
  • 27 is a top view of the section of the accumulator that is in 26 is shown;
  • 28 contains views of sections of the accumulator that are in 26 is shown;
  • 29 FIG. 11 is an exploded perspective view of a portion of the accumulator incorporated in FIG 1 shown with portions removed;
  • 30 FIG. 14 is a rear perspective view of a portion of the accumulator shown in FIG 1 shown with portions removed;
  • 31 FIG. 13 is another perspective rear view of the portion of the accumulator shown in FIG 30 is shown;
  • 32 FIG. 11 is an exploded perspective view of a portion of the accumulator incorporated in FIG 1 shown with portions removed;
  • 33 is a perspective view of the portion of the accumulator, which in 32 is shown;
  • 34 is a perspective, enlarged view of a portion of the accumulator, which in 33 is shown;
  • 35 contains a view of sections of the accumulator in 1 shown with portions omitted;
  • 36 Fig. 13 is a rear perspective view of an existing battery;
  • 37 FIG. 16 is a front perspective view of the accumulator incorporated in FIG 36 is shown;
  • 38 is a left side view of the accumulator which is in 36 is shown;
  • 39 FIG. 15 is a perspective view of a portion of the accumulator incorporated in FIG 36 and explaining the battery cells and the battery terminal device;
  • 40 FIG. 10 is a right side view of the battery cells and the battery terminal device incorporated in FIG 39 is shown;
  • 41 is a front perspective view of another accumulator;
  • 42 is a right side view of the accumulator in 41 is shown;
  • 43 is a left side view of the accumulator which is in 41 is shown;
  • 44 is a top view of the accumulator in 41 is shown;
  • 45 is a rear perspective view from the bottom of the accumulator, which in 41 is shown;
  • 46 is a front view of the accumulator which is in 41 is shown;
  • 47 is a rear view of the accumulator in 41 is shown;
  • 48 is a front perspective view of another accumulator;
  • 49 is a right side view of the accumulator in 48 is shown;
  • 50 is a left side view of the accumulator which is in 48 is shown;
  • 51 is a top view of the accumulator in 48 is shown;
  • 52 is a rear perspective view from the bottom of the accumulator, which in 48 is shown;
  • 53 is a front view of the accumulator which is in 48 is shown;
  • 54 is a rear view of the accumulator in 48 is shown;
  • 55 Fig. 13 is a perspective view of a storage battery in use with a first electrical device, such as a power tool;
  • 56 Fig. 13 is a perspective view of an accumulator in use with a second electrical device, for example a power tool;
  • 57 Fig. 13 is a perspective view of a portion of a secondary battery illustrating the battery cells;
  • 58 Fig. 12 is a perspective view of a portion of a storage battery and illustrates the battery cells, terminals, end caps and circuits;
  • 59 FIG. 14 is a rear perspective view of the portion of the accumulator incorporated in FIG 58 is shown;
  • 60 is a right side view of the portion of the accumulator that is in 58 is shown;
  • 61 is a left side view of the portion of the accumulator that is in 58 is shown;
  • 62 is a front view of the portion of the accumulator which is in 58 is shown;
  • 63 is a rear view of the portion of the accumulator which is in 58 is shown;
  • 64 is a top view of the section of the accumulator that is in 58 is shown;
  • 65 Figure 11 is a perspective view of a portion of the accumulator illustrating the end caps;
  • 66 is a partial, perspective side view of a portion of the housing of a battery;
  • 67 is a partial, front perspective view of the portion of the housing that is in 66 is shown; and
  • 68 - 69 are still more schematic diagrams of the components of a battery.
  • Before some of the embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of the components which will be set forth in the following description or shown in the following drawings. The invention may have other embodiments and may be practiced and practiced in various ways. It is also to be understood that the words and terminology used herein are for the purpose of description and should not be considered as limiting. The use of "contain," "have," or "have," and variations thereof, are meant herein to include items listed thereafter and equivalents thereof as well as additional items.
  • An accumulator 30 , which embodies aspects of the invention is disclosed in 1 - 9 shown. The accumulator 30 may be connected to an electrical device, for. B. a wireless power tool 34 (shown in 11A ) to the power tool 34 to energize selectively. The accumulator 30 can from the power tool 34 can be removed and charged by a battery charger 38 (shown in 8th ) be recharged.
  • As in 1 - 9 is shown contains the accumulator 30 a housing 42 and at least one rechargeable battery cell 46 (shown in 13 - 19 ) coming from the case 42 is held. In the illustrated construction, the accumulator 30 a 21 V accumulator, the 5 accumulator cells 46a . 46b . 46c . 46d and 46e contains approximately 4.2V connected in series. In other constructions (not shown), the accumulator 30 another nominal battery voltage, e.g. B. 9.6 V, 12 V, 14.4 V, 24 V, etc., to energize the electrical equipment and the accumulator charger 38 to be charged. It should be noted that in other constructions (not shown) the accumulator cells 46 may have a different nominal cell voltage and / or be connected in a further construction, for example in parallel or in a parallel / serial combination.
  • The accumulator cells 46 may be any type of rechargeable chemical type battery cells, e.g. As a nickel cadmium (NiCd), a Nickel-metal hydride (NiMH), lithium (Li), lithium ion (Li-ion), other lithium-based chemical cells, other rechargeable chemical type accumulator cells, etc. In the illustrated construction, the battery cells 46 Be lithium-ion (Li-ion) -Akkumulatorzellen. For example, the accumulator cells 46 have a chemistry with lithium cobalt (Li-Co), lithium-magnesium (Li-Mn) spinel, Li-Mn nickel or the like.
  • As in 13 - 20 can be shown in the accumulator 30 each accumulator cell 46a - 46e be generally cylindrical and can move along a cell axis 50a - 50e extend parallel to the cylindrical outer cell wall. In the accumulator 30 can also be any accumulator cell 46 a cell length 52 have larger than twice and almost three times the cell diameter 54 is. In the illustrated construction, and in some aspects, each accumulator cell 46 have a diameter of about twenty-six millimeters (26 mm) and a length of at least about sixty millimeters (60 mm). In some constructions, each accumulator cell can 46 have a length of about sixty five millimeters (65 mm). In some constructions, each accumulator cell can 46 have a length of about seventy millimeters (70 mm).
  • The accumulator cells 46 are in a first sentence 56 of accumulator cells 46a . 46b and 46c and in a second sentence 58 from accumulator cells 46d and 46e arranged. In the first sentence 56 are the cell axes 50a . 50b and 50c parallel to each other. In the second sentence 58 are the cell axes 50d and 50e parallel to each other. The sentences 56 and 58 however, are arranged so that the battery cells 46a . 46b and 46c not parallel to the accumulator cells 46d and 46e are. In the illustrated construction, the battery cells 46a . 46b and 46c for example, normal or perpendicular to the battery cells 46d and 46e be.
  • The accumulator cells 46 are arranged such that the heat transfer between the battery cells 46 is reduced and that the accumulation and removal of heat from the battery cells 46 is improved. In this way, the accumulator cells 46 be maintained in a suitable temperature operating range for longer periods of use. The accumulator cells 46 are also arranged to provide effective space utilization and maintain a relatively small battery size.
  • As in 1 - 4 and 7 shown, the housing can 42 a support portion 60 to hold the accumulator 30 on an electrical device, for example a power tool 34 or a battery charger 38 , In the illustrated construction, the support portion 60 a C-shaped cross-section (see. 7 ), which is connectable to the complementary T-shaped cross-section of the support portion of the electrical device.
  • The accumulator 30 can also (see 1 - 4 . 8th - 9 . 21 . 24 - 25 and 30 - 38 ) a locking device 74 included, which works such that the accumulator 30 is locked to the electrical device, for. B. on the power tool 34 and / or the battery charger. The locking device 34 contains locking parts 78 between a locked position in which the locking parts 78 engage in a corresponding locking part on the electrical device to the accumulator 30 to be locked or locked to the electrical device, and a dearretierten or unlocked position are movable. The locking device 74 also contains actuators 82 for moving the locking parts 78 between the locked position and the locked position. The actuators 82 have a large surface area for operator intervention to provide improved ease of unlocking the locking device 74 to be able to provide. The actuators 82 are also held to the engaging force required for unlocking the locking device 74 is required to reduce.
  • As in 30 - 38 is shown, tension the biasing parts 83 the locking parts 78 in the direction of the locked position. In the illustrated construction, each biasing member 83 a leaf spring between the actuator 82 and the housing 42 is arranged to the locking part 78 to bias in the locked position.
  • Each header part 83 is between the actuator 82 and the housing 42 attached and works in such a way that the actuator 82 (and the locking part 78 ) are held in a position and that an unwanted movement of the actuator 82 (and the locking part 78 ) relative to the housing 42 is restricted. The biasing part 83 in particular restricts or limits the movement of the actuator 82 (and the locking part 78 ) in a direction perpendicular to the direction of movement between the locked position and the deared position (ie, upward in the cross-sectional views of FIG 35 ), to prevent the actuator 82 and / or the locking member 78 on the housing 42 be blocked or prevented from moving in the desired manner to the locking device 74 to operate.
  • As in 32 and 35 is shown contains the biasing part 83 a housing leg 84 that in the case 42 engages to the biasing part 83 down (in the left cross-sectional view of 35 ) to force. The biasing part 83 also contains (see the right cross-sectional view of 35 ) an actuator leg 85 that is in the actuator 83 engages the actuator 82 (and the locking part 78 ) in the correct downward position (in the cross-sectional views of FIG 35 ) during operation of the locking device 74 and the accumulator 30 to pull and hold.
  • The accumulator 30 contains (see 1 - 5 . 7 . 13 - 14 and 17 - 20 ) a connection device 86 that works so that it's the accumulator cells 46 connects to a circuit in the electrical device. The connection device 86 contains (see 1 - 3 ) a positive accumulator connection 98 , a ground connection 102 , and a sensor connector 106 , As schematically in 20 shown are the connections 98 and 102 with the opposite ends of the cells or the series of cells 46 connected.
  • The sensor connection 106 may be connected to one or more electrical components, for example an identification component (ie, a resistor), to identify a property of the accumulator 30 to communicate, for example, the chemistry of the accumulator cells 46 , the nominal voltage of the accumulator 30 etc., or a temperature detecting device or a thermistor to the temperature of the accumulator 30 and / or the accumulator cell (s) 46 tell. It should be understood that in other constructions (not shown), the electrical components may be other types of electrical components and other characteristics or information about the accumulator 30 and / or the accumulator cell (s) 46 can communicate. It should be understood that "communicating" and "communicating" as used with respect to the electrical components also includes having or being in a condition or condition of the one or more sensors or sensors a device that can determine the condition or state of the electrical components.
  • In some constructions and in some aspects, the sensor connection 106 with a circuit 430 be connected as in 21 - 23 and 68 - 69 is shown. The circuit 430 can be electrical with one or more accumulator cells 46 be connected and can electrically with one or more accumulator terminals of the terminal block 86 be connected. In some constructions, the circuit can 430 Components contain the capacity of the accumulator 30 to improve. In some constructions, the circuit can 430 Components for monitoring accumulator characteristics, providing voltage detection, storing accumulator characteristics, displaying accumulator characteristics, informing a user of particular accumulator characteristics, blocking power within the accumulator 30 , to detect the temperature of the accumulator 30 , the accumulator cells 46 and the like, for transferring heat from the accumulator 30 and / or within the accumulator 30 , and for providing a balancing method when an imbalance within one or more accumulator cells 46 is detected. In some constructions and in some aspects, the circuit contains 430 a voltage detection circuit, a booster circuit, a charge-up indicator, and the like. In some constructions, the circuit can 430 with a printed circuit board (PCB) 145 be coupled. In other constructions, the circuit 430 with a flexible circuit 445 , as explained below, be coupled. In some constructions, the flexible circuit 445 around one or more cells 46 be winding or around the inside of the case 42 wound, as will be explained below.
  • In some constructions, the circuit can 430 a microprocessor 430 contain. The microprocessor 430 For example, various accumulator parameters (eg, the current state of charge of the accumulator, the current state of charge of the accumulator cell, the accumulator temperature, the accumulator cell temperature, and the like) may monitor various accumulator parameters and characteristics (including the nominal voltage of the accumulator, chemistry, and the like in addition to the parameters ) can store various electrical components within the circuit 430 control and may perform communication with other electrical devices, such as a power tool, a battery charger, and the like. In some constructions, the microprocessor can 430 monitor the current state of charge of each battery cell and can detect when an imbalance occurs (eg, the current state of charge of a battery cell exceeds the average cell state of charge by a certain amount or falls below the average cell state of charge by a certain amount).
  • In some constructions and in some aspects, the circuit can 430 a voltage detection circuit 459 contain. In some constructions, the voltage detection circuit may be 459 a variety of resistances 460 that form Resistance divider networks. As shown in the illustrated construction, the plurality of resistors 460 the resistances 460a -D included. The variety of resistors 460 can be electric with a or more battery cells 46a -E and with a variety of transistors 465 be connected. In the illustrated construction, the plurality of transistors 465 transistors 465a -D included. In some constructions, the number of resistors in the variety of resistors 460 are equal to the number of resistors included in the plurality of transistors 465 are included.
  • In some constructions, the voltage characteristics of the accumulator can 30 and / or the accumulator cells 46 from the microprocessor 440 through a variety of resistances 460 be read when the microprocessor 440 is in the active mode. In some constructions, the microprocessor can 440 trigger a voltage read event by turning on the transistor (s) 470 (ie the transistor 470 becomes non-conductive). If the transistor (s) 470 the transistors are (are) non-conductive 265a -D conducting and the voltage measurements with respect to the accumulator 30 and / or the accumulator cells 46 can from the microprocessor 440 be executed. Accommodating the plurality of transistors 465 in the accumulator 30 can remove the parasitic current coming from the accumulator 30 is deducted, reduce, as the transistors 465 only periodically conductive.
  • In some constructions, the microprocessor can 440 the voltage of each accumulator cell 46 monitor and the cell 46 compensate if an imbalance occurs. As explained above, the accumulator 30 the variety of resistances 460 for providing the voltage measurements of the battery cells 46 contain. The variety of resistors 460 is arranged such that the microprocessor 440 the voltage of each of the battery cells 46a -E can measure at about the same time. In some constructions, the microprocessor detects 440 an imbalance within the accumulator 30 if one or more cells 46 reach about 1V.
  • In some constructions and in some aspects the accumulator can 30 the cells 46 compensate again if an imbalance over a compensation circuit 459 has been detected. In some constructions, the accumulator can 30 the accumulator cells 46 compensate again if the accumulator 30 is in a discharge operation or if the accumulator 30 does not provide a discharge current or receives a charging current. In some constructions, the compensation circuit 459 a variety of resistances 460 and a variety of transistors 465 contain. In some constructions, the microprocessor locks 440 the accumulator 30 (For example, it interrupts the accumulator operation, it prevents accumulator operation, etc.) via the switch 180 if a balance R between the cells 46 no longer within an acceptable range. After the accumulator 30 has been locked, determines the microprocessor 440 which cell (s) 46 imbalance is or are (the "low voltage cell").
  • In some constructions, the microprocessor activates 440 the respective transistors or turn them on, for example, the transistors 465a -D, that electrically with those cells 46 which are not low in the current state of charge (ie, the cells having a higher current state of charge than the cell having a low voltage). The microprocessor 440 begins a controlled discharge of the cells 46 with high current state of charge. For example, the microprocessor controls the small discharge current, that of the balanced cells 46 flows through the respective transistors. The microprocessor 440 continues or continues with the voltage measurements of the cells 46 during the entire controlled unloading process. The microprocessor 440 stops the controlled discharging process when the present state of charge of the cells 46 is reduced with higher state of charge such that it is approximately equal to that of the previous low-voltage cell.
  • Components of the circuit 430 and the accumulator 30 , for example a FET 480 , a heat sink 485 , a thermistor 450 , a charge indicator 170 (The one or more light emitting diodes 470a -D), a push button 460 to activate the charge indicator 470 , a microprocessor 440 and the like are in more detail in 20 - 29 shown. For some constructions and for some aspects, these and other additional independent features and structures of the accumulator are 30 and further operations of the accumulator 30 in greater detail in the U.S. Patent 7,157,882 B2 , described.
  • As in 8th is shown is the accumulator charger 38 with the accumulator 30 connectable and is operable so that the accumulator 30 is charged. The accumulator charger 38 contains a charging case 122 that has a mounting portion 124 to which the accumulator 30 is held, and a charging circuit 126 (schematically in 12 shown) is from the housing 122 and is connectable to the power source (not shown). The charging circuit 126 is with a charging connector 128 with the connection device 86 of the accumulator 30 connected and is operable such that power to the accumulator 30 is transmitted to the accumulator cell (s) 46 to be able to charge.
  • In some constructions and in some aspects the charging circuit works 126 to the accumulator 30 in a manner similar to that in the US Pat. No. 6,456,035 B1 and in US 6,222,343 B1 is described.
  • For some constructions and for some aspects, additional, independent features, structures and operations of the accumulator loader will be added 38 in more detail in the U.S. Patent 7,157,882 B2 and in that U.S. Patent 7,176,654 B2 described.
  • The accumulator 30 is connectable to the electrical device, for example with the power tool 34 (shown in 11A ) to the power tool 34 to supply electricity. The power tool 34 contains a housing 182 that has an electric motor 184 contains (shown schematically), which is electrically connected to the accumulator 30 through (see 11B ) a power tool connection device 186 connected so that the engine 184 from the accumulator 30 is selectively supplied with electricity. The housing 182 puts (see 11B ) a support portion 186 ready at which the accumulator 30 is held. The support section 186 generally has a T-shaped cross-section which is complementary to the C-shaped cross-section of the support portion 60 of the accumulator 30 is. The support section 186 also defines locking receptacles 188 (not shown), in which the locking parts 78 can intervene to the accumulator 30 on the power tool 34 to lock.
  • An alternative construction of a rechargeable battery 30A , which embodies aspects of the invention is disclosed in 10 shown. Common elements are identified by like reference characters "A".
  • As stated above, the accumulator 30 more or less accumulator cells 46 as the embodiment shown and may have a higher or lower nominal voltage than the constructions shown and described. Such a construction of a rechargeable battery 30B which has a higher nominal voltage is, for example, in 41 - 47 shown.
  • The common elements are identified by the same reference character "B". Another construction of a rechargeable battery 30C is in 48 - 54 shown. Common elements are identified by the same reference character "C".
  • Unless otherwise specified below, the accumulator may 30 on different constructions of the accumulator 30 (eg the accumulator 30 , the accumulator 30A , the accumulator 30B and the accumulator 30C ) Respectively. Unless otherwise specified, the accumulator may 30B also on both the accumulator 30B as well as on the accumulator 30C Respectively.
  • In some constructions, the accumulator can 30 for transmitting electrical energy to and receiving electrical energy from various electrical devices, for example, various power tools, battery chargers, and the like. In other constructions, the accumulator 30 for transmitting power to various high power electrical devices, for example: various power tools, including electrically powered tools used in manufacturing and assembling; Lawn and garden equipment, including tools used in agricultural applications; portable lighting, signaling and flash devices; motorized vehicles, including electric scooters, mopeds, motorized delivery vehicles and the like; Vacuum cleaners and other electrically powered household and commercial appliances, tools and devices, electrically powered toys; remote-controlled aircraft, automobiles and other vehicles and also auxiliary engines and the like. In some constructions, z. B. the structures in 55 and 56 can be shown, the accumulator 30 electric power various power tools, eg. B. a drill 300 , a band saw 305 and the like. In some constructions, the accumulator can 30 various power tools (including a drill 300 or a drill and a circular saw 305 ), which have high discharge rates. For example, the accumulator 30 an average discharge current equal to or greater than about 20 amps, and may have an ampere-hour capacity of about 3.0 amps.
  • In some constructions, the accumulator can 30 , z. B. the accumulator 30B , seven accumulator cells 346a -G (shown in 57 ) to have. In some constructions, the accumulator cells can 346a -G similar to the accumulator cells 46a -E be in the accumulator 30 are included. In some constructions, the accumulator cells can 346a -G from the battery cells 46a -E differ in weight, size, nominal tension, chemistry and the like. For example, in a structure, the battery cells 346a -G have a cell chemistry of Li-ion, z. Li-Mn spinel, Li-Mn-nickel or Li-Co. In some constructions, every cell can 346a -G have a nominal voltage of about 3.6V. In other constructions every cell can 346a -G have a nominal voltage of about 4V and in other constructions every cell 346a -G have a nominal voltage of about 4.2V. In some constructions, the accumulator can 30B seven accumulator cells 346a -G and may have a nominal voltage of about 28V. In other constructions, the accumulator 30B seven accumulator cells 346a -G and may have a nominal voltage of about 25V.
  • The accumulator cells 346a Also, g may be electrically connected in a suitable manner, for example, in a serial arrangement, a parallel arrangement, a partial serial arrangement (eg, some of the accumulator cells 346a -G connected in a serial arrangement), a partially parallel arrangement (eg, some of the accumulator cells 346a -G connected in a serial arrangement), a combination of serial, parallel, partially serial or partially parallel arrangements. In one construction, the accumulator cells are 346a -G electrically connected in a serial arrangement. The accumulator cells 346a -G can electrically via conductive strips or bands 450 be connected. For example, a conductive tape 450 the negative end of the first accumulator cell 346a with the positive end of the second accumulator cell 346b connect. Also may be another senior band 450 the negative end of the second accumulator cell 346b with the positive end of the third accumulator cell 346c connect.
  • As in 58 - 65 The accumulator can be shown 30 , for example the accumulator 30B , also an end cap assembly 505 contain. In some constructions, the end cap assembly may be used to space the accumulator cells 346 be used. The end cap assembly 505 contains a first end cap 510 and a second end cap 515 , The first endcap 510 and the second end cap 515 can through a connecting section 520 be connected. In some constructions, the connecting portion 520 be a hinge or a hinge. In some constructions, the end cap assembly includes 505 not the connecting section 520 , Each end cap 510 and 515 may partially one or more chambers or cavities 530 (shown in 65 ) limit. The end of an accumulator cell 346 can be inside a cavity 530 be arranged. In the illustrated construction, the first end cap is included 510 and the second end cap 520 seven chambers each 530a -G for positioning seven corresponding accumulator cells 346a -G.
  • In the illustrated construction, the first end cap 510 at a first end 490 (shown in 57 ) of the arrangement of the battery cells 346 arranged and the second end cap 515 is at the second end 495 the arrangement of the battery cells 346 arranged. As mentioned above, each end of each accumulator cell 346a -G within the respective cavities 530a -G of the first end cap 510 and the second end cap 515 be arranged. Each end cap 510 and 515 can the chambers 530a -G limit to column or spaces between the accumulator cells 346 to generate when the accumulator cells 346 inside the chambers 530 are arranged. This can be a higher heat dissipation within the accumulator 30B Allow air to pass through the gaps and spaces between the cells 346 can circulate.
  • In some constructions, the first end cap 510 and the second end cap 515 still openings 450 limit. The openings 450 can conductive tapes 450 for electrically connecting an accumulator cell 346 with another accumulator cell 346 receive.
  • In some constructions and in some aspects, the end cap assembly may 505 also a flexible circuit 445 contain. In some constructions, the flexible circuit 445 integral with either the first end cap 510 , the second endcap 515 , the connecting section 520 or a combination thereof. In other constructions, the end cap assembly 505 limit one or more areas for holding the flexible circuit. In other constructions, the flexible circuit 445 at the end cap assembly 505 be assured. As shown in the illustrated construction, the flexible circuit 445 partly around the accumulator cells 346 be wound around or folded.
  • In the illustrated construction, the end cap assembly 505 a plug 560 for electrically connecting the flexible circuit 445 with the PCB or the printed circuit board 145B contain. In this construction, the PCB 145B and the flexible circuit 445 each a section of the circuit 430 included in the accumulator 30B is included.
  • In some constructions and in some aspects the accumulator can 30 Upholstery parts or "rubber parts" 640 contain. As in 66 and 67 Shown is the inner surface 645 of the accumulator housing 42B one or more upholstery parts 640 contain. In some constructions, the upholstery parts can 640 integral with the housing 42B be. In other constructions, the upholstery parts 640 on the inner surface 645 of the housing 42B be secured or secured. In other constructions, the upholstery part 640 with one or more accumulator cells 346 or with the end cap assembly 505 that partially the accumulator cells 346 surrounds, be connected. In some constructions, the upholstery parts can 645 Absorbing energy during impact or impact and the accumulator cells 346 during serving by limiting the amount of energy going to the cell 346 is transmitted. The upholstery parts 645 may be any thermoplastic rubber, e.g. For example, polypropylene RPT 100 FRHI (eg, flame retardant, high impact).

Claims (6)

  1. Accumulator for connection to a power tool ( 34 ) or a battery charger ( 38 ), comprising: an accumulator housing ( 42 ); at least three ports, including one positive port ( 98 ), a ground connection ( 102 ) and a sensor connection ( 106 ), wherein the at least three terminals are formed so that they are connected to corresponding terminals of the power tool ( 34 ) or the accumulator loader ( 38 ) are connectable; a plurality of rechargeable battery cells ( 46a -e; 346a -G) which are arranged and held within the housing, wherein charges between the battery cells and the power tool ( 34 ) or the accumulator charger ( 38 ) are transferable; a compensation circuit ( 459 ) which is adapted to cause a state of charge imbalance between the battery cells ( 46a -e; 346a -G) based on a plurality of voltages of the battery cells ( 46a -e; 346a -G) measured at the same time; and a control circuit ( 430 ), which is designed so that in the event of 459 ) detected state of charge imbalance the state of charge of the battery cells ( 46a -e; 346a -G), wherein the control circuit is a microprocessor ( 440 ).
  2. Accumulator according to claim 1, wherein the equalization circuit ( 459 ) a plurality of resistors ( 460 ).
  3. Accumulator according to claim 1, wherein the equalization circuit ( 459 ) a plurality of transistors ( 465 ).
  4. The accumulator according to claim 1, which is designed such that the accumulator cells ( 46a -e; 346a -G) when the accumulator is in an unloading operation.
  5. Accumulator according to claim 1, wherein the microprocessor ( 440 ) is designed so that the accumulator via a switch ( 180 ) is locked when a balance ratio between the battery cells ( 46a -e; 346a -G) falls outside a certain range.
  6. Accumulator according to claim 5, wherein the microprocessor ( 440 ) is adapted to interrupt the operation of the accumulator when the balance ratio between the accumulator cells ( 46a -e; 346a -G) falls outside the specified range.
DE102004030037A 2002-11-22 2004-06-22 Accumulator Active DE102004030037B4 (en)

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US52371203P true 2003-11-19 2003-11-19
US52371603P true 2003-11-19 2003-11-19
US60/523712 2003-11-19
US60/523716 2003-11-19
US10/720027 2003-11-20
US10/719,680 US7176654B2 (en) 2002-11-22 2003-11-20 Method and system of charging multi-cell lithium-based batteries
US10/720,027 US7157882B2 (en) 2002-11-22 2003-11-20 Method and system for battery protection employing a selectively-actuated switch
US10/719680 2003-11-20
US10/721,800 US7253585B2 (en) 2002-11-22 2003-11-24 Battery pack
US10/721800 2003-11-24
US57427804P true 2004-05-24 2004-05-24
US60/574278 2004-05-24
US57461604P true 2004-05-25 2004-05-25
US60/574616 2004-05-25

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