EP3729538A1 - Bloc-batterie pour machine-outil portative - Google Patents

Bloc-batterie pour machine-outil portative

Info

Publication number
EP3729538A1
EP3729538A1 EP18807918.0A EP18807918A EP3729538A1 EP 3729538 A1 EP3729538 A1 EP 3729538A1 EP 18807918 A EP18807918 A EP 18807918A EP 3729538 A1 EP3729538 A1 EP 3729538A1
Authority
EP
European Patent Office
Prior art keywords
battery pack
battery
battery cells
potting material
cells
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.)
Pending
Application number
EP18807918.0A
Other languages
German (de)
English (en)
Inventor
Robert Stanger
Markus Hunger
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.)
Hilti AG
Original Assignee
Hilti AG
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
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP3729538A1 publication Critical patent/EP3729538A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/623—Portable devices, e.g. mobile telephones, cameras or pacemakers
    • H01M10/6235—Power tools
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/643—Cylindrical cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a battery pack for an electric hand tool machine, wherein the battery pack has a housing with a plurality of preferably cylindrical battery cells.
  • Such a battery pack is known for example from DE 10 2013 218 527 A1.
  • the battery cells of this battery pack are thermally connected via an aluminum element.
  • the object is achieved in that the battery cells are at least partially surrounded by a heat-conductive potting material for the purpose of heat dissipation.
  • the invention includes the knowledge that known from the prior art battery packs with heat dissipation elements, in particular with those made of aluminum, are expensive to install and expensive to manufacture. Furthermore, in such battery packs, a comparatively poor heat transfer from the battery cells to the heat dissipation element was found. Among other things, this is due to manufacturing tolerances.
  • the battery cells are at least partially surrounded by a heat-conductive potting material, these disadvantages are avoided.
  • the heat-conductive potting material is introduced in liquid form into the battery pack and then cured.
  • the battery cells are at least partially enclosed by the potting material and there are no cavities between battery cells and the housing, whereby a comparatively good heat dissipation to the housing of the battery pack is realized. Synergetisch thus takes the potting both the role of a townleitelements between the battery cells and between the battery cells and the housing.
  • the potting material has a thermal conductivity of at least 1 W / (m * K) (W per meter and Kelvin).
  • the thermal conductivity of the potting material may be at least 2 W / (m * K).
  • the potting material particularly preferably has a flammability class V-0 according to UL94.
  • the potting material may be based on polyurethane and is preferably an elastomer. Particularly preferably, the potting material is electrically insulating.
  • the specific resistance of the potting material according to IEC 60093 is preferably greater than 10 E10 W * cm, preferably greater than 10 E11 W * cm.
  • the potting material surrounds the battery cells completely.
  • the already mentioned heat removal is realized to the outside of the housing of the battery pack.
  • the battery pack is sealed against dirt and moisture.
  • the battery pack has a cell holder which holds the battery cells within the housing.
  • the cell holder preferably forms at least one demarcated potting chamber, within which the battery cells are surrounded by the heat-conductive potting material.
  • the potting chamber or the potting chambers are arranged near a thermoelectric hotspot of the battery cells or a respective battery cell.
  • the battery cells are designed as lithium polymer cells or as lithium-ion cells.
  • the filling material is free of a thermoset.
  • the filler material is an elastomer, so that mechanical stresses can be compensated within the housing of the battery pack.
  • the no-load voltage of the battery pack is limited to 60 V DC.
  • FIG. 1 shows a first preferred embodiment of a battery pack according to the invention
  • Fig. 2 shows the embodiment of Figure 1 in a side view.
  • FIG. 3 shows a second preferred embodiment of a battery pack according to the invention
  • Fig. 4 shows a third preferred embodiment of a battery pack according to the invention.
  • FIG. 1 shows a battery pack 10 according to the invention for the electrical supply of a handheld power tool 100, which is shown schematically in FIG. 1 at the bottom right.
  • the battery pack 10 has a housing 9 with a plurality of cylindrical battery cells 1, 2.
  • the battery cells 1, 2 are surrounded for the purpose of heat dissipation by a heat-conductive potting material 8.
  • the potting material 8 has a thermal conductivity of about 1 W / (m * K) and is based on polyurethane.
  • the potting material 8 is introduced into the housing 9 such that it completely surrounds the battery cells 1, 2.
  • FIG. 2 illustrates the embodiment of Fig. 1 in a side view.
  • the cylindrical battery cells 1, 2, which are each contacted via a cell connector 5 with each other electrically.
  • the battery pack 10 of FIG. 2 can be manufactured such that initially a housing 9 is provided, in which the battery cells 1, 2 are accommodated. Subsequently, the potting material 8 is introduced in liquid form into the housing 9 and then cured. Thus, the lithium polymer cells exemplified here are completely surrounded by the potting material 8, wherein a uniform heat dissipation is realized.
  • FIG. 1 A second embodiment of a battery pack 10 according to the invention is shown in FIG. Compared to the embodiment of FIG. 2, the thermally conductive potting material 8 only partially sections the battery cells 1, 2. A predominant part of the battery cells 1, 2, in the present embodiment shown about 90% based on the length of the battery cells 1, 2, is surrounded by the potting material. In the region of the cell connector 5, which electrically contacts the battery cells 1, 2, the housing 9 or the battery cells 1, 2 are free of potting material.
  • FIG. 4 shows a third exemplary embodiment of a battery pack 10 according to the invention.
  • the housing 9 of the battery pack 10 is indicated only schematically by the dashed line.
  • the battery pack 10 has a total of 12 cylindrical battery cells 1, 2 in the form of lithium-ion cells.
  • the battery cells are electrically contacted by the cell connector 5.
  • the battery pack 10 has two cell holders 7, T, which are designed and intended to hold the battery cells 1, 2 within the housing 9.
  • the cell holder 7, T form a frame in the preferably rectangular or square frame, which encloses the battery cells 1, 2 from the outside.
  • each of the cell holder 7, T forms a delimited potting chamber 6, 6 ', within which the battery cells 1, 2 are surrounded by the heat-conductive potting material. If the cell holders 7, 7 'or their potting chambers 6, 6' are filled with the potting material, quasi disc-shaped heat dissipation elements are formed.
  • the cell holders 7, T have passage openings 3, 3 ', which essentially correspond to the outer circumference of the battery cells 1, 2. Through these passage openings 3, 3 ', a respective battery cell 1, 2 are inserted into the cell holder 7 and simultaneously closes the cell holder 7 from the environment. When filling the cell holder 7, 7 'or the potting 6, 6' thus disc-shaped heat-conducting form.
  • the potting chambers 6, 6 ' are in this case arranged close to the thermoelectric hotspots of the battery cells 1, 2 in order to ensure optimum heat dissipation.
  • four such (in potted state) disc-shaped cell holder can be provided in the longitudinal direction LR.
  • four cell holders, one cell holder each, are arranged terminal to the battery cells 1, 2, ie in the region of the upper cell connectors 5 and lower cell connectors (5).
  • Two further cell holders can be arranged approximately in the middle, relative to the length LR ,

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un bloc-batterie pour une machine-outil portative électrique, ce bloc-batterie présentant un boîtier comprenant une pluralité de cellules de préférence cylindriques. Ces cellules sont entourées au moins en partie par un matériau de scellement thermoconducteur à des fins de dissipation thermique.
EP18807918.0A 2017-12-19 2018-11-19 Bloc-batterie pour machine-outil portative Pending EP3729538A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17208347.9A EP3503244A1 (fr) 2017-12-19 2017-12-19 Batterie pour une machine-outil portative
PCT/EP2018/081748 WO2019120815A1 (fr) 2017-12-19 2018-11-19 Bloc-batterie pour machine-outil portative

Publications (1)

Publication Number Publication Date
EP3729538A1 true EP3729538A1 (fr) 2020-10-28

Family

ID=60673947

Family Applications (2)

Application Number Title Priority Date Filing Date
EP17208347.9A Withdrawn EP3503244A1 (fr) 2017-12-19 2017-12-19 Batterie pour une machine-outil portative
EP18807918.0A Pending EP3729538A1 (fr) 2017-12-19 2018-11-19 Bloc-batterie pour machine-outil portative

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17208347.9A Withdrawn EP3503244A1 (fr) 2017-12-19 2017-12-19 Batterie pour une machine-outil portative

Country Status (4)

Country Link
US (1) US20200335740A1 (fr)
EP (2) EP3503244A1 (fr)
CN (1) CN111418084A (fr)
WO (1) WO2019120815A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019130378A1 (de) * 2019-11-11 2021-05-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Fügen einer elektrischen Zelle und elektrischer Speicher
CA3158596A1 (fr) * 2019-11-21 2021-05-27 Jr. Robert David Sumpf Systeme d'accumulation d'energie integre
DE102020115485A1 (de) 2020-06-10 2021-12-16 Bayerische Motoren Werke Aktiengesellschaft Haltevorrichtung für Batteriezellen
DE102020117928A1 (de) 2020-07-07 2022-01-13 Webasto SE Batteriepack zur Integration in ein Batteriemodul sowie Verfahren zum Herstellen eines Batteriepacks

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4173235B2 (ja) * 1998-12-18 2008-10-29 松下電器産業株式会社 電池パック装置
DE102008059960B4 (de) * 2008-12-02 2013-07-04 Daimler Ag Verfahren zur Herstellung einer Batterie, nach dem Verfahren hergestellte Batterie und Batterieverbund aus zwei derartigen Batterien
JP2011113721A (ja) * 2009-11-25 2011-06-09 Sanyo Electric Co Ltd パック電池の製造方法
DE102013211459A1 (de) * 2013-06-19 2014-12-24 Robert Bosch Gmbh Handwerkzeugmaschinenakkupack
DE102013218527A1 (de) 2013-09-16 2015-04-02 Robert Bosch Gmbh Akku
JP6261449B2 (ja) * 2014-05-30 2018-01-17 ダイキョーニシカワ株式会社 電池モジュール
WO2016067517A1 (fr) * 2014-10-29 2016-05-06 三洋電機株式会社 Bloc-batterie et support de dissipation de chaleur
DE102015219280A1 (de) * 2015-10-06 2017-04-06 Robert Bosch Gmbh Batteriesystem mit Vergussmasse
CN205900600U (zh) * 2016-07-19 2017-01-18 成都硅宝科技股份有限公司 一种安全电池组

Also Published As

Publication number Publication date
CN111418084A (zh) 2020-07-14
WO2019120815A1 (fr) 2019-06-27
US20200335740A1 (en) 2020-10-22
EP3503244A1 (fr) 2019-06-26

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