WO2014173830A1 - Dispositif et procédé de fixation d'un dissipateur thermique sur une cellule galvanique - Google Patents

Dispositif et procédé de fixation d'un dissipateur thermique sur une cellule galvanique Download PDF

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Publication number
WO2014173830A1
WO2014173830A1 PCT/EP2014/057956 EP2014057956W WO2014173830A1 WO 2014173830 A1 WO2014173830 A1 WO 2014173830A1 EP 2014057956 W EP2014057956 W EP 2014057956W WO 2014173830 A1 WO2014173830 A1 WO 2014173830A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat sink
fastening device
layer
electrical insulation
galvanic cell
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.)
Ceased
Application number
PCT/EP2014/057956
Other languages
German (de)
English (en)
Inventor
Peter Englert
Stefan Hirsch
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of WO2014173830A1 publication Critical patent/WO2014173830A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • H01M10/65—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries
    • 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
    • H01M10/625—Vehicles
    • 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

  • Fastening device for a heat sink to a galvanic cell and a method for fixing a heat sink to a galvanic cell
  • the invention relates to a fastening device for a heat sink to a galvanic cell according to the preamble of claim 1 and a method for fixing a heat sink to a galvanic cell according to the preamble of claim 9.
  • High-performance batteries such as lithium-ion batteries
  • the operation of such high-power cells generates heat loss, which leads to the heating of the high-performance cell.
  • lithium-ion batteries age from a design-related temperature but much faster, so shorten the life of the lithium-ion battery undesirable.
  • heat sinks are attached to the lithium-ion battery.
  • EP 2 200 109 A2 discloses a holding and cooling device for a galvanic cell is disclosed in which at the bottom of the individual battery cells of a lithium-ion battery, a cooling plate for cooling the lithium-ion battery is mounted.
  • the cooling plate contains internal channels, in which a coolant is passed.
  • the cooling plate consists entirely of aluminum and is joined in a soldering process to form a fluid-tight cooler.
  • the soldering process inevitably leads to contamination of the surface of the heat sink by, for example, flux or solder residues.
  • grinding, brushing and other cleaning processes must therefore be carried out, which additionally increases the cost of the manufacturing process.
  • a multilayer, preferably designed as a label, composite film, which comprises a heat sink to be arranged on the mechanical barrier layer, on which an electrical insulation layer is disposed, is used.
  • This has the advantage that grinding and cleaning operations can be omitted after the completion process of the heat sink, whereby the production costs are reduced.
  • an increase in the Manufacturing quality causes, since the multilayer composite film is easy to handle. At the same time sufficient electrical insulation between the cells and heat sink is achieved, the direct heat-conducting contact between the heat sink and the lithium-ion battery is also reliably ensured.
  • the heat-conducting, mechanical barrier layer can be connected to the heat sink via a first cohesive connection.
  • the mechanical barrier layer which rests directly on the heat sink, thus represents a barrier to the particles and impurities that are present after the manufacturing process on the heat sink.
  • This mechanical barrier reliably prevents damage to the overlying electrical insulation layer by particles and contaminants.
  • the mechanical barrier layer fulfills the task of heat conduction and thus reliably conducts the heat generated by the lithium-ion battery to the heat sink.
  • the first cohesive connection is formed as an adhesive layer, the thickness of which is preferably selected so that unevenness on the heat sink can be compensated.
  • This adhesive layer also has good thermal conductivity and acts as a "gap filler", compensating for unevenness and manufacturing tolerances on the heat sink, as well as trapping and leveling particles on the heat sink, as well as allowing smaller holes in the surface due to the mechanical barrier layer
  • the electrical insulation layer is connected via a second cohesive layer Compound, preferably a second adhesive layer, flat positioned on the mechanical barrier. The thickness of the second cohesive connection is chosen such that the most solid possible composite with the mechanical barrier layer is ensured, and this second adhesive layer is also good heat conducting,
  • the electrical insulation layer consists of a plastic, preferably a polyester, which has an electrical breakdown strength of several 1000 volts. This electrical insulation layer increases the process reliability,
  • the electrical insulation layer is covered with a protective layer, which is attached via a third cohesive connection, preferably an adhesive layer, on the electrical insulation layer.
  • the protective layer and / or the third cohesive connection are designed to be electrically conductive. In particular, this property allows it to remain on the electrical insulation layer during the test of the composite film on dielectric strength.
  • the mechanical barrier layer and / or the protective layer consist of a metal, preferably aluminum.
  • the use of a metal on the one hand supports the heat conduction between the lithium-ion battery and the heat sink and at the same time guarantees the electrical conductivity.
  • the mechanical barrier layer does not necessarily have to consist of a metal, but may also consist of other materials, such as fiber-reinforced plastic or steel, which have the properties explained.
  • a development of the invention relates to a method for fastening a heat sink to a galvanic cell by means of a fastening device according to this patent application.
  • the fastening device designed as a composite film is applied after a soldering process of the heat sink to the uncleaned heat sink with a first cohesive connection of the multilayer composite film.
  • a test of a dielectric strength of the electrical insulation layer takes place before the removal of the protective layer and the third cohesive connection.
  • This test for electrical impact resistance is made by placing an electrode on the protective layer.
  • the protective layer is not removed.
  • a potential contamination of the electrical insulation layer by the placement of the electrode is avoided in this type of test.
  • Fig. 1 shows a first embodiment of an inventive
  • Fastening device, 2 shows the first embodiment without a protective layer
  • Fig. 1 shows a first embodiment of a fastening device according to the invention, which is formed as a composite film 1.
  • the composite film 1 is arranged on a heat sink 2.
  • the composite film 1 consists of several layers.
  • the first layer of the composite film 1 is formed as an adhesive layer 3 and is directly on the uncleaned after manufacture heat sink 2.
  • the adhesive layer 3 is formed so thick that even a good heat conduction between the heat sink 2 and a non-illustrated lithium-ion battery is possible.
  • the good heat-conducting adhesive layer 3 is also designed so thick that it is suitable for filling unevenness 10 and manufacturing tolerances. Due to this different thickness of the adhesive layer 3 particles can be trapped on the heat sink 2 and the plane can be leveled.
  • an aluminum foil 4 is arranged, which is a mechanical barrier to particles and impurities that arise on the heat sink 2 during the soldering process. This mechanical barrier prevents penetration of the particles and impurities onto the further layers arranged on the aluminum foil 4.
  • a polyester film 6 is arranged, which is secured by means of a very thin second adhesive layer 5 on the aluminum foil 4.
  • the adhesive layer 5 serves to produce a solid, two-dimensional composite of the polyester film 6 with the aluminum foil 4, wherein these too Adhesive layer 5 has good thermal conductivity, in order to ensure good heat dissipation from the lithium-ion battery to the heat sink 2.
  • the polyester film 6 is used for electrical insulation between lithium-ion battery and heat sink 2 and has a dielectric strength of about 4000 to 6500 volts. Thus, there is sufficient electrical insulation between the lithium-ion battery and the heat sink 2.
  • the polyester film 6 is covered with a further aluminum foil 8, which serves as a protective layer.
  • the aluminum foil 8 is positioned on the polyester film 6 via a thin adhesive layer 7, which consists of a pressure-sensitive adhesive.
  • the adhesive layer 7 is to be realized as thin as possible and may for example consist of Emeraldine, an electrically conductive pressure-sensitive adhesive.
  • the pressure-sensitive adhesive 7 must allow easy removal of the aluminum foil 8 arranged over it, whereby any dirt particles are removed.
  • the serving as a protective layer second aluminum foil 8 is designed very thin and also electrically conductive.
  • Fig. 2 shows the composite foil with the removed second aluminum foil 8, as it is prepared for connection to the lithium-ion battery.
  • a basic sequence of the method of fastening the heat sink to the lithium-ion battery 4 by means of the composite foil 1 is shown in FIG.
  • the laminated film 1 formed as a label is adhered to the soldered, not further cleaned heat sink 2, which is e.g. can be done easily with a label dispenser.
  • the first adhesive layer 3 is applied to the heat sink 2.
  • the polyester film 6 is still protected by the adhesive layer 7 and the second aluminum foil 8.
  • step b a test of the dielectric strength of the composite film 1 is performed.
  • an electrode 9 is placed on the, serving as a protective layer second aluminum foil 8. Since the second aluminum foil 8 and the adhesive layer 7 are electrically conductive, the second aluminum foil 8 are not removed from the composite film 1 for this test. If the test for dielectric strength is finished, the cooling body 2 carrying the composite film 1 is prepared for shipping, the second aluminum foil 8 serving as a protective film against contamination.
  • step a If the assembly made in step a is now to be connected to the lithium-ion battery, the second aluminum foil 8 together with the adhesive layer 7 is removed from the composite foil 1, as shown in step d, immediately before the assembly, particles of the polyester foil being present being removed 6 I i) are removed.
  • the now clean polyester film 6 is positioned directly on the lithium-ion battery.
  • this composite foil 1 By means of this composite foil 1, a unit for connection of a lithium-ion battery to a heat sink 2 is provided, in which the 15 battery cells of the lithium-ion battery in immediate, i. thermally conductive contact with the heat sink 2 are brought. On the other hand, safety aspects, such as sufficient electrical insulation between battery cells and heat sink 2, are sufficiently taken into account. 0

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un dispositif de fixation d'un dissipateur thermique sur une cellule galvanique qui assure un contact thermoconducteur et en même temps une isolation électrique entre le dissipateur thermique (2) et la cellule galvanique. Dans un dispositif de fixation qui peut être disposé directement sur le dissipateur thermique non nettoyé, on utilise un film composite multicouche (1), réalisé de préférence sous la forme d'une étiquette, qui possède une couche d'arrêt mécanique (4), à disposer sur le dissipateur thermique (2), sur laquelle une couche d'isolation électrique (6) est appliquée.
PCT/EP2014/057956 2013-04-25 2014-04-17 Dispositif et procédé de fixation d'un dissipateur thermique sur une cellule galvanique Ceased WO2014173830A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013207597.9 2013-04-25
DE201310207597 DE102013207597A1 (de) 2013-04-25 2013-04-25 Befestigungseinrichtung für einen Kühlkörper an einer galvanischen Zelle und ein Verfahren zur Befestigung eines Kühlkörpers an einer galvanischen Zelle

Publications (1)

Publication Number Publication Date
WO2014173830A1 true WO2014173830A1 (fr) 2014-10-30

Family

ID=50513937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/057956 Ceased WO2014173830A1 (fr) 2013-04-25 2014-04-17 Dispositif et procédé de fixation d'un dissipateur thermique sur une cellule galvanique

Country Status (2)

Country Link
DE (1) DE102013207597A1 (fr)
WO (1) WO2014173830A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008106949A2 (fr) * 2007-03-05 2008-09-12 Temic Automotive Electric Motors Gmbh Boîtier destiné à recevoir une cellule d'accumulation d'énergie
JP2008294413A (ja) * 2007-04-25 2008-12-04 Hitachi Chem Co Ltd 熱伝導性フィルム
DE102008053311A1 (de) * 2007-10-27 2009-04-30 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zur Spannungsversorgung eines Kraftfahrzeugs
WO2010018066A1 (fr) * 2008-08-13 2010-02-18 Behr Gmbh & Co. Kg Élément galvanique
EP2200109A2 (fr) * 2008-12-12 2010-06-23 Behr GmbH & Co. KG Dispositif de retenue et de refroidissement pour une cellule galvanique
EP2325000A1 (fr) * 2008-09-08 2011-05-25 Nippon Steel Chemical Co., Ltd. Film de polyimide hautement thermo-conducteur, stratifié blindé hautement thermo-conducteur et procédé de production associé

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008061011A1 (de) * 2008-12-08 2010-06-10 Conti Temic Microelectronic Gmbh Energiespeicher, insbesondere für ein Fahrzeug
DE102011007069B4 (de) * 2011-04-08 2018-11-22 Continental Automotive Gmbh Elektrischer Energiespeicher mit mehreren Zellen und wenigstens einem zwischen den Zellen angeordneten Kühlelement und dessen Verwendung
DE102012218102A1 (de) * 2011-10-04 2013-06-06 Behr Gmbh & Co. Kg Batterie für ein Fahrzeug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008106949A2 (fr) * 2007-03-05 2008-09-12 Temic Automotive Electric Motors Gmbh Boîtier destiné à recevoir une cellule d'accumulation d'énergie
JP2008294413A (ja) * 2007-04-25 2008-12-04 Hitachi Chem Co Ltd 熱伝導性フィルム
DE102008053311A1 (de) * 2007-10-27 2009-04-30 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zur Spannungsversorgung eines Kraftfahrzeugs
WO2010018066A1 (fr) * 2008-08-13 2010-02-18 Behr Gmbh & Co. Kg Élément galvanique
EP2325000A1 (fr) * 2008-09-08 2011-05-25 Nippon Steel Chemical Co., Ltd. Film de polyimide hautement thermo-conducteur, stratifié blindé hautement thermo-conducteur et procédé de production associé
EP2200109A2 (fr) * 2008-12-12 2010-06-23 Behr GmbH & Co. KG Dispositif de retenue et de refroidissement pour une cellule galvanique

Also Published As

Publication number Publication date
DE102013207597A1 (de) 2014-10-30

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