WO2022034759A1 - Heat dissipation member, heat dissipation structure, and battery - Google Patents

Heat dissipation member, heat dissipation structure, and battery Download PDF

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Publication number
WO2022034759A1
WO2022034759A1 PCT/JP2021/025426 JP2021025426W WO2022034759A1 WO 2022034759 A1 WO2022034759 A1 WO 2022034759A1 JP 2021025426 W JP2021025426 W JP 2021025426W WO 2022034759 A1 WO2022034759 A1 WO 2022034759A1
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WO
WIPO (PCT)
Prior art keywords
heat
heat radiating
heat dissipation
sheet
battery
Prior art date
Application number
PCT/JP2021/025426
Other languages
French (fr)
Japanese (ja)
Inventor
和哉 中田
Original Assignee
信越ポリマー株式会社
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Filing date
Publication date
Application filed by 信越ポリマー株式会社 filed Critical 信越ポリマー株式会社
Publication of WO2022034759A1 publication Critical patent/WO2022034759A1/en

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    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • 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 heat radiating member, a heat radiating structure, and a battery.
  • Control systems for automobiles, aircraft, ships or household or commercial electronic devices are becoming more accurate and complex, and the density of small electronic components on circuit boards is increasing. .. As a result, it is strongly desired to solve the failure and shortening of the life of electronic components due to heat generation around the circuit board.
  • the circuit board itself has traditionally been made of a material with excellent heat dissipation, and a single or multiple means such as attaching a heat sink or driving a cooling fan have been used. It is done.
  • a method in which the circuit board itself is made of a material having excellent heat dissipation, such as diamond, aluminum nitride (AlN), cubic boron nitride (cBN), etc. makes the cost of the circuit board extremely high.
  • the arrangement of the cooling fan causes a problem that a rotating device called a fan fails, maintenance is required to prevent the failure, and it is difficult to secure an installation space.
  • the heat radiating fin is a simple one that can increase the surface area and further improve the heat radiating property by forming a large number of columnar or flat plate-shaped projecting portions using a metal having high thermal conductivity (for example, aluminum). Since it is a member, it is generally used as a heat dissipation component (see Patent Document 1).
  • the rubber sheet has lower thermal conductivity than aluminum or graphite, it is difficult to efficiently transfer heat from the battery cell to the housing.
  • a method of sandwiching a spacer such as graphite instead of a rubber sheet is also conceivable, but since the lower surfaces of a plurality of battery cells are not flat and have steps, a gap is created between the battery cells and the spacer, and the heat transfer efficiency is improved. descend.
  • the battery cell can take various forms (including unevenness such as a step or a non-smooth surface state), it can be adapted to various forms of the battery cell and has high heat transfer efficiency. There is a growing demand for realization.
  • the applicant has proposed to bring a graphite or metal heat radiating member into contact with a heat source to improve the heat radiating property from the heat source.
  • a heat source it may be necessary to improve not only heat dissipation but also electrical insulation.
  • the adhesion with the heat source is further enhanced to improve the heat dissipation.
  • Such a point leads not only to the battery cell but also to other heat sources such as circuit boards, electronic components or the main body of electronic devices. Responding to such demands will also contribute to the achievement of Applicant's Sustainable Development Goals of "Ensuring access to cheap, reliable and sustainable modern energy for all.”
  • the present invention has been made in view of the above problems, and is adaptable to various forms of heat sources, has abundant elastic deformability, and has high heat dissipation and electrical insulation properties, a heat dissipation structure, and a battery.
  • the purpose is to provide.
  • the heat dissipation member according to the embodiment for achieving the above object is a heat dissipation member that enhances heat dissipation from a heat source, and has a form in which a sheet is rolled into an arc shape, and the sheet has heat conduction. It includes a member and a coating layer that covers the outside of the heat conductive member.
  • the heat radiating member according to another embodiment may preferably have a form in which the long sheet is spirally wound and advanced.
  • the coating layer may be configured such that the thickness of the outer surface rounded in an arc shape is thinner than the thickness of the inner surface rounded in an arc shape.
  • the coating layer includes a flange provided on at least one of the width directions of the sheet and a bag body closed by the flange, and the heat conduction is provided.
  • the member may be present inside the bag body.
  • the heat conductive member may be a liquid or a flowable semi-solid body.
  • the liquid or the semi-solid body may contain a carbon filler.
  • the heat conductive member is the liquid or the semi-solid body arranged on the outside rolled in an arc shape and the solid arranged on the inside arranged in an arc shape. May include a shaped plate and.
  • the heat radiating member according to another embodiment preferably includes a high adhesion means for enhancing the adhesion between the coating layer and the heat conductive member between the coating layer and the heat conductive member. You may have.
  • the heat radiating structure according to the embodiment includes two or more heat radiating members according to any one of the above.
  • the battery according to one embodiment is a battery having one or more battery cells as heat sources in a housing, and any of the above-mentioned batteries is provided between the battery cells and the housing. It is equipped with a heat dissipation member.
  • a heat radiating member a heat radiating structure, and a battery that are adaptable to various forms of a heat source, are rich in elastic deformability, and have high heat dissipation and electrical insulation.
  • FIG. 1A shows a plan view of a long sheet used for a heat radiating member according to an embodiment of the present invention.
  • FIG. 1B shows a plan view of a heat radiating member using the sheet of FIG. 1A.
  • FIG. 1C shows an enlarged cross-sectional view when the heat radiating member of FIG. 1B is cut along the line AA.
  • FIG. 2A shows an example of manufacturing a coating layer provided with the flange of FIG. 1C.
  • FIG. 2B shows a manufacturing example different from that of FIG. 2A.
  • FIG. 2C shows a manufacturing example different from that of FIGS. 2A and 2B.
  • FIG. 3A shows a modified example of the heat dissipation member of FIG.
  • FIG. 1C in an enlarged cross-sectional view taken along the line AA similar to that of FIG. 1C.
  • FIG. 3B shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from that of FIG. 3A.
  • FIG. 3C shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A and 3B.
  • FIG. 3D shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B and 3C.
  • FIG. 3E shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B, 3C and 3D.
  • FIG. 3A, 3B, 3C and 3D shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B, 3C and 3D.
  • FIG. 4 shows a plan view of the heat dissipation structure according to the embodiment.
  • FIG. 5 shows a plan view of a modified example of the heat dissipation structure of FIG.
  • FIG. 6 shows a vertical cross-sectional view of a battery including two or more heat dissipation members of FIG. 1B.
  • FIG. 7 is a cross-sectional view when the battery cell is horizontally placed on the heat radiation structure of FIG. 4 so as to be in contact with the side surface of the battery cell, a partially enlarged view thereof, and a part when the battery cell expands during charging and discharging. Sectional views are shown respectively.
  • FIG. 8A shows a manufacturing process of the heat radiating member according to the first modification and a front view of the heat radiating member.
  • FIG. 8B shows a front view of the heat radiating member according to the second modification.
  • FIG. 1A shows a plan view of a long sheet used for a heat radiating member according to an embodiment of the present invention.
  • FIG. 1B shows a plan view of a heat radiating member using the sheet of FIG. 1A.
  • FIG. 1C shows an enlarged cross-sectional view when the heat radiating member of FIG. 1B is cut along the line AA.
  • the heat radiating member 2 is a heat radiating member that enhances heat dissipation from a heat source, and has a form in which the sheet 1 is rolled into an arc shape.
  • the sheet 1 is a long sheet. Further, the sheet 1 has a form in which the sheet 1 is continuously rolled in an arc shape and is wound in a so-called spiral shape. The morphology that progresses while being wound in a spiral shape is included in the morphology that is rolled into an arc shape.
  • the long sheet 1 may be referred to as a band-shaped sheet 1.
  • the sheet 1 includes a heat conductive member 20 and a coating layer 10 that covers the outside of the heat conductive member 20.
  • the heat radiating member 2 is a long member wound in a spiral shape. Therefore, the heat radiating member 2 can be deformed so as to form irregularities in units of the width of the sheet 1 in the thickness direction thereof, and can be expanded and contracted in the length direction of the heat radiating member 2.
  • the covering layer 10 constituting the sheet 1 preferably includes a flange 11 provided on at least one of the width directions of the sheet 1 (both in this embodiment), and a bag body 15 closed by the flange 11.
  • the heat conductive member 20 exists inside the bag body 15.
  • the flange 11 is more preferably a portion formed on the entire outer peripheral edge of the sheet 1 and sealing the heat conductive member 20.
  • the flange 11 can be manufactured, for example, by the following method.
  • FIG. 2A shows an example of manufacturing a coating layer provided with the flange of FIG. 1C.
  • FIG. 2B shows a manufacturing example different from that of FIG. 2A.
  • FIG. 2C shows a manufacturing example different from that of FIGS. 2A and 2B.
  • FIG. 2A shows a cross-sectional view of a method of heat welding the same or a plurality of types of thermoplastic resins.
  • a covering layer 10 having a flange 11 and formed into a U-shaped cross section is prepared first.
  • the groove of the coating layer 10 is filled with the heat conductive member 20 or a curable composition that is cured to become the heat conductive member 20.
  • the lid corresponding to the inner sheet 12, which will be described later, is heat-welded from above the filler and the flange 11.
  • ultrasonic welding, vibration welding, high frequency welding, laser welding and the like can be exemplified.
  • FIG. 2B shows a cross-sectional view of the extrusion tube method.
  • a tube (corresponding to the inside of the bag 15) formed by monochromatic or multicolor extrusion is filled with a heat conductive member 20 or a curable composition that is cured to become a heat conductive member 20.
  • the flange 11 is formed during extrusion molding. In this way, the covering layer 10 having the heat conductive member 20 inside is completed.
  • FIG. 2C shows a cross-sectional view of the laminating method.
  • printing is performed with ink containing a component for the heat conductive member 20 on a film corresponding to the outer sheet 13 described later.
  • a film corresponding to the inner sheet 12 described later is attached to the printed surface.
  • a flange 11 formed of two films is formed on the outside of the print layer. In this way, the laminated coating layer 10 having the heat conductive member 20 inside is completed.
  • the above-mentioned welding method is not limited to the above-mentioned example. Any welding method or further bonding method can be used as long as the heat conductive member 20 existing inside the bag body 15 of the coating layer 10 can be sealed.
  • the end portion of the sheet 1 in the length direction is the end portion without the flange 11.
  • the heat radiating member 2 with the flange 11 can be manufactured by sealing the end portion in the length direction.
  • the flange 11 is useful for maintaining the elasticity of the heat radiating member 2 when the sheet 1 is spirally wound due to its rigidity.
  • the coating layer 10 and the heat conductive member 20 will be described in detail. ..
  • the coating layer 10 includes an inner sheet 12 located inside the spiral heat-dissipating member 2, an outer sheet 13 located outside the spiral heat-dissipating member 2, and both sides of the inner sheet 12 in the width direction.
  • a protruding flange 11 and a flange 11 are provided.
  • the area closed by the inner sheet 12 and the outer sheet 13 constitutes the bag body 15.
  • the bag body 15 is a portion protruding from the inner sheet 12 in the cross-sectional view thereof.
  • the protruding surface of the bag body 15 is preferably a bay arc-shaped surface.
  • the flange 11 is configured to be flush with the inner sheet 12, but it does not have to be flush with the inner sheet 12.
  • the covering layer 10 is preferably configured such that the thickness of the outer surface of the spiral is thinner than the thickness of the inner surface of the spiral. That is, the thickness (T1) of the outer sheet 13 is smaller than the thickness (T2) of the inner sheet 12.
  • the outer sheet 13 is a portion that comes into contact with a heat source. By making the thickness (T1) of the outer sheet 13 as thin as possible, the heat conductivity from the heat source to the heat conductive member 20 can be enhanced.
  • the thickness (T1) of the outer sheet 13 is preferably smaller than the thickness of the heat conductive member 20 (same as the thickness direction of the sheet 1). Further, the materials of the inner sheet 12 and the outer sheet 13 may be the same or different.
  • the coating layer 10 is a layer capable of covering and protecting the heat conductive member 20 by enhancing both the electrical insulation property with the heat source and the adhesion with the heat source.
  • the coating layer 10 is preferably a layer having higher electrical insulation than the heat conductive member 20.
  • the electrical resistivity of the coating layer 10 is preferably 1.0 ⁇ 10 7 (Ohm ⁇ m) or more, and more preferably 1.0 ⁇ 10 8 (Ohm ⁇ m) or more.
  • the coating layer 10 is preferably a layer having a lower hardness than the heat conductive member 20.
  • the coating layer 10 is preferably a thermoplastic elastomer such as silicone rubber, urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber, nitrile rubber (NBR) or styrene butadiene rubber (SBR); urethane-based , Ester-based, styrene-based, olefin-based, butadiene-based, fluorine-based and other thermoplastic elastomers, or composites thereof.
  • a thermoplastic elastomer such as silicone rubber, urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber, nitrile rubber (NBR) or styrene butadiene rubber (SBR); urethane-based , Ester-based, styrene-based, olefin-based, butadiene-based, fluorine-based and other
  • the coating layer 10 may be formed of a heat-resistant resin such as polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyamideimide (PAI), aromatic polyamide (aramid fiber), or the like.
  • the coating layer 10 is preferably made of a material having high heat resistance to the extent that its morphology can be maintained without being melted or decomposed by the heat transferred from the heat source.
  • the coating layer 10 is more preferably composed of a urethane-based elastomer impregnated with silicone or a silicone rubber.
  • the coating layer 10 may be configured by dispersing a filler typified by Al 2 O 3 , AlN, cBN, hBN, diamond particles, or the like in rubber in order to enhance its thermal conductivity as much as possible.
  • the "coating layer” means a member having high flexibility and elastically deformable so as to be in close contact with the surface of a heat source, and in this sense, it can be read as "rubber-like elastic body".
  • the coating layer 10 can also be made of a sponge or a solid (a structure that is not porous like a sponge) formed of resin, rubber, or the like.
  • the heat conduction member 20 receives heat from a heat source via a coating layer 10 and transfers heat to a portion (cooling portion or another heat source) other than the heat source via the coating layer 10.
  • the heat conductive member 20 is a member having a higher thermal conductivity than the coating layer 10.
  • the heat conductive member 20 does not necessarily have to be a member having high electrical conductivity.
  • the heat conductive member 20 may be excellent in heat conductivity regardless of the level of electrical conductivity. Even when the heat conductive member 20 is excellent in both electric conductivity and heat conductivity, since the coating layer 10 is interposed between the heat source and the heat conductive member 20, the heat source and the heat conductive member 20 are insulated from each other. You can secure sex.
  • the heat conductive member 20 is preferably a liquid or a fluid semi-solid body.
  • the heat conductive member 20 preferably contains oil, particularly silicone oil.
  • Silicone oils preferably consist of molecules with a linear structure having a siloxane bond of 2000 or less. Silicone oil is roughly classified into straight silicone oil and modified silicone oil. Examples of the straight silicone oil include dimethyl silicone oil, methyl phenyl silicone oil, and methyl hydrogen silicone oil. Examples of the modified silicone oil include reactive silicone oil and non-reactive silicone oil.
  • the reactive silicone oil includes, for example, various silicone oils such as an amino-modified type, an epoxy-modified type, a carboxy-modified type, a carbinol-modified type, a methacryl-modified type, a mercapto-modified type, and a phenol-modified type.
  • the non-reactive silicone oil includes various silicone oils such as a polyether-modified type, a methylstyryl-modified type, an alkyl-modified type, a higher fatty acid ester-modified type, a hydrophilic special-modified type, a higher fatty acid-containing type, and a fluorine-modified type.
  • the oil preferably contains a thermally conductive filler composed of one or more of metal, ceramics or carbon, in addition to the oil component.
  • the metal include gold, silver, copper, aluminum, beryllium, and tungsten.
  • the ceramics include alumina, aluminum nitride, cubic boron nitride, and hexagonal boron nitride.
  • Examples of carbon include diamond, graphite, diamond-like carbon, amorphous carbon, and carbon nanotubes.
  • a carbon filler such as graphite can be more preferably exemplified.
  • the filler may have any shape such as granular, needle-shaped, and fibrous.
  • a paste such as grease can be exemplified.
  • Grease mainly contains base oils, thickeners and additives.
  • a thermally conductive filler consisting of one or more of the above-exemplified metals, ceramics or carbon can be included.
  • FIG. 3A shows a modified example of the heat radiating member of FIG. 1C in an enlarged cross-sectional view taken along the line AA similar to that of FIG. 1C.
  • FIG. 3B shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from that of FIG. 3A.
  • FIG. 3C shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A and 3B.
  • FIG. 3D shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B and 3C.
  • FIG. 3E shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B, 3C and 3D.
  • FIG. 3A shows a heat radiating member 2 including a liquid or semi-solid heat conductive member and a solid heat conductive member inside the bag 15. That is, the heat radiating member 2 includes a liquid or semi-solid heat conductive member 20 arranged outside the spiral and a solid plate 25 arranged inside the spiral.
  • the solid plate 25 is an example of another heat conductive member different from the heat conductive member 20.
  • the liquid or semi-solid heat conductive member 20 can flexibly deform and adhere to the surface shape of the heat source, and the solid plate 25 can exhibit a function of realizing good heat conduction. Is.
  • the solid plate 25 is, for example, a carbon plate typified by graphite, a metal plate typified by aluminum, and a ceramic plate typified by alumina. Hereinafter, details and variations of the solid plate 25 will be described.
  • the solid plate 25 is not limited to its constituent material, but is preferably a sheet containing carbon, and more preferably a sheet composed of 90% by mass or more of carbon.
  • a graphite film formed by firing a resin can also be used for the solid plate 25.
  • the solid plate 25 may be a sheet containing carbon and resin.
  • the resin may be synthetic fiber, and in that case, aramid fiber can be preferably used as the resin.
  • carbon as used in the present application is broadly defined to include any structure composed of carbon (element symbol: C) such as graphite, carbon black having lower crystallinity than graphite, diamond, and diamond-like carbon having a structure similar to diamond. Is interpreted as.
  • the solid plate 25 can be a thin sheet obtained by curing a material in which graphite fibers or carbon particles are mixed and dispersed in a resin.
  • the solid plate 25 may be carbon fibers knitted in a mesh shape, and may be blended or knitted.
  • various fillers such as graphite fiber, carbon particles or carbon fiber are all included in the concept of carbon filler.
  • the resin may exceed 50% by mass or 50% by mass or less with respect to the total mass of the solid plate 25. Is also good. That is, it does not matter whether or not the solid plate 25 is mainly made of resin as long as there is no great problem in heat conduction.
  • a thermoplastic resin can be preferably used.
  • the thermoplastic resin a resin having a high melting point that does not melt when conducting heat from a heat source is preferable, and for example, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyamideimide (PAI), and fragrance.
  • Group polyamide (aramid fiber) and the like can be preferably mentioned.
  • the resin is dispersed in the gaps between the carbon fillers, for example, in the form of particles or fibers in the state before molding of the solid plate 25.
  • the solid plate 25 may or may not have excellent conductivity.
  • the thermal conductivity of the solid plate 25 is preferably 10 W / mK or more.
  • the solid plate 25 is preferably a film made of graphite and is made of a material having excellent thermal conductivity and conductivity.
  • the solid plate 25 is preferably a sheet having excellent bendability (or flexibility), and the thickness thereof is not limited, but 0.02 to 3 mm is preferable, and 0.03 to 0.5 mm is more preferable. ..
  • the amount of heat transmitted by the solid plate 25 increases as the thickness of the plate 25 increases. It is preferable to determine the thickness by comprehensively considering the strength, flexibility and thermal conductivity of the sheet.
  • the heat conductive member 20 having a low hardness and being easily deformed and the solid plate 25 having a higher hardness than the heat conductive member 20 are placed in a bag body 15 so as to be located on the outside and the inside of the spiral heat radiation member 2, respectively. If it is provided inside the above, it is possible to achieve both high adhesion to a heat source and high thermal conductivity in the length direction of the heat radiating member 2.
  • the enlarged view of a part B shows a cross section of a boundary portion between the solid plate 25 and the inner sheet 12.
  • the solid plate 25 has an uneven easy-adhesion surface 26 on the surface facing the inner sheet 12.
  • the easy contact surface 26 is an uneven surface.
  • the easy-adhesion surface 26 is an example of a high-adhesion means for enhancing the adhesion between the coating layer 10 and the heat conductive member (solid plate 25).
  • the easy contact surface 26 may be formed on the inner sheet 12 side.
  • FIG. 3B shows a heat radiating member 2 in which the thickness of the inner sheet 12 and the thickness of the outer sheet 13 are substantially the same. Since the outer sheet 13 is a contact area with a heat source, it is preferable that the outer sheet 13 is as thin as possible. On the other hand, the inner sheet 12 is thinner than the outer sheet 13 as an important factor. However, the inner sheet 12 may have the same thickness as the outer sheet 13. In this example, the flange 11 is not flush with the inner sheet 12.
  • FIG. 3C shows a flangeless heat dissipation member 2.
  • the coating layer 10 contains a liquid or semi-solid heat conductive member 20 inside.
  • the cross-sectional shape of the heat radiating member 2 is substantially rectangular. As described above, the heat radiating member 2 may be flangeless. Similar to the heat radiating member 2 of FIG. 3A, it is preferable that T1 ⁇ T2.
  • FIG. 3D shows a heat dissipation member 2 that is flangeless and has a heat conductive member as a solid plate 25.
  • the cross-sectional shape of the heat radiating member 2 is substantially rectangular.
  • the liquid or semi-solid heat conductive member 20 is not an essential component, but may be a member provided with a solid plate 25. Similar to the heat radiating member 2 of FIG. 3A, it is preferable that T1 ⁇ T2.
  • the enlarged view of a part C shows a cross section of a boundary portion between the solid plate 25 and the outer sheet 13.
  • the heat radiating member 2 has an adhesive layer 27 between the solid plate 25 and the outer sheet 13.
  • the adhesive layer 27 is between the coating layer 10 and the heat conductive member (solid plate 25), and is an example of high adhesion means for improving the adhesion between the two 10 and 25.
  • the adhesive layer 27 may be formed between any surface inside the coating layer 10 such as the inner sheet 12 and the solid plate 25.
  • FIG. 3E shows a heat dissipation member 2 that is flangeless and includes a liquid or semi-solid heat conductive member and a solid heat conductive member as in FIG. 3A.
  • the cross-sectional shape of the heat radiating member 2 is substantially rectangular.
  • the heat radiating member 2 of FIG. 3E and the heat radiating member 2 of FIG. 3A are common in that they include both the solid plate 25 and the heat conductive member 20 of a liquid or a semi-solid body.
  • a high-adhesion means represented by the easy-adhesion surface 26 or the adhesive layer 27 may be formed between the solid plate 25 and the inner sheet 12. Further, the high adhesion means may be formed on the heat conductive member 20 side. Similar to the heat radiating member 2 of FIG. 3A, it is preferable that T1 ⁇ T2.
  • FIG. 4 shows a plan view of the heat dissipation structure according to the embodiment.
  • FIG. 5 shows a plan view of a modified example of the heat dissipation structure of FIG.
  • the heat dissipation structures 3 and 4 described below include two or more heat dissipation members 2 according to the above-described embodiment and various modifications.
  • the heat radiating structure 3 is an aggregate of two or more heat radiating members 2 in a non-connected state. For example, when the heat radiating structure 3 is interposed between the heat source and the cooling member, it is preferable to arrange two or more heat radiating members 2 in a separated state.
  • the heat radiating structure 4 is a structure in which two or more heat radiating members 2 are arranged in a direction perpendicular to the length direction thereof, and the heat radiating members 2 are fixed to each other by using a tape-shaped fixing member 5.
  • the fixing member 5 preferably fixes both ends of the heat radiating member 2 in the length direction. However, in addition to the both ends, the substantially central portion of the heat radiating member 2 in the length direction may be fixed. Further, either one end side may be fixed. Further, only the substantially central portion may be fixed. Further, although the fixing member 5 fixes only one side of the heat dissipation structure 4, it may be fixed on both sides of the front and back sides. Further, the fixing member 5 is not limited to the tape-shaped member, and may be a thread.
  • the heat radiating members 2 may be tied together with a thread and fixed, or may be sewn and fixed with a thread.
  • the heat radiating structure 4 is interposed between the heat source and the cooling member, it is preferable to arrange two or more heat radiating members 2 in a connected state.
  • FIG. 6 shows a vertical cross-sectional view of a battery including two or more heat dissipation members of FIG. 1B.
  • the "vertical cross-sectional view” means a view that vertically cuts from the upper opening surface inside the housing of the battery to the bottom.
  • the battery 30 is, for example, a battery for an electric vehicle and includes a large number of battery cells 40.
  • the battery 30 includes a bottomed housing 31 that opens to one side.
  • the housing 31 is preferably made of aluminum or an aluminum-based alloy.
  • the battery cell 40 is arranged inside 34 of the housing 31.
  • An electrode is provided above the battery cell 40 so as to project.
  • the plurality of battery cells 40 are preferably brought into close contact with each other in the housing 31 by applying a force in the direction of compression from both sides thereof using screws or the like (not shown).
  • the battery cell 40 is arranged in the housing 31 so as to sandwich the heat radiating structure 3 with the bottom portion 32 of the housing 31.
  • the heat radiating structure 4 may be arranged instead of the heat radiating structure 3.
  • the bottom portion 32 is provided with a flow path 33 for flowing cooling water, which is an example of a cooling medium (also referred to as a cooling member or a cooling agent) 35.
  • a cooling medium also referred to as a cooling
  • the battery 30 includes a battery cell 40 as one or more heat sources in the housing 31, and a heat dissipation member 2 is provided between the battery cell 40 and the housing 31 (for example, the bottom 32). Be prepared. It can be said that the plurality of heat radiating members 2 provided in the heat radiating structure 3 are interposed between the battery cell 40 and the cooling medium 35. In the battery 30 having such a structure, the battery cell 40 transfers heat to the cooling medium 35 flowing through the bottom portion 32 and the flow path 33 through the heat radiating member 2, and is effectively removed by water cooling.
  • FIG. 7 is a cross-sectional view when the battery cell is horizontally placed on the heat radiation structure of FIG. 4 so as to be in contact with the side surface of the battery cell, a partially enlarged view thereof, and a part when the battery cell expands during charging and discharging. Sectional views are shown respectively.
  • the battery cell 40 may be arranged so that the side surface of the battery cell 40 is in contact with each heat radiating member 2 of the heat radiating structure 3.
  • the temperature of the battery cell 40 rises during charging and discharging. If the container of the battery cell 40 itself is made of a flexible material, the side surface of the battery cell 40 may bulge in particular. Even in such a case, as shown in FIG.
  • each heat dissipation member 2 of the heat dissipation structure 3 can be deformed according to the shape of the outer surface of the battery cell 40, high heat dissipation can be maintained even during charging and discharging.
  • the side surface of the battery cell 40 may be brought into contact with the heat radiating structure 4.
  • FIG. 8A shows the manufacturing process of the heat radiating member according to the modified example 1 and the front view of the heat radiating member.
  • FIG. 8B shows a front view of the heat radiating member according to the second modification.
  • the heat radiating member 2 according to the modified example 1 has a form in which the sheet 1 having the same structure as the sheet 1 in FIG. 3C is rolled in an arc shape in the width direction. By bending both sides of the sheet 1 in the width direction in the direction of the arrow F, the sheet 1 becomes a heat radiating member 2 having an arc-shaped rounded shape.
  • the heat radiating member 2 is flangeless.
  • the coating layer 10 contains a liquid or semi-solid heat conductive member 20 inside. In FIGS. 8A, 8B and 8C, the heat conductive member 20 is drawn by a dotted line because it is enclosed inside the covering layer 10.
  • the cross-sectional shape of the heat radiating member 2 is substantially rectangular.
  • the covering layer 10 is preferably configured such that the thickness of the outer surface rounded in an arc shape is thinner than the thickness of the inner surface rounded in an arc shape.
  • the shape of the heat radiating member 2 is not a completely closed cylinder, but a tubular body having a slit 50 in a part thereof. When the heat radiating member 2 is arranged so that the slit 50 faces the bottom 32 and the side opposite to the slit 50 faces the battery cell 40 in the battery 30, the heat radiating member 2 receives a load in the direction of arrow G from the battery cell 40. It deforms into a flat shape. The heat from the battery cell 40 is transferred to the bottom 42 along the heat channels L1 and L2.
  • the heat radiating member 2 according to the modification 2 has a shape in which the alphabet C is turned inside out.
  • the heat radiating member 2 according to the modified example 2 has the same form as the modified example 1 in which the sheet 1 is rolled in an arc shape, and the slit 51 is wider than the slit 50 described above.
  • the heat radiating structure 2 according to the modification 2 is deformed in a flat shape between the battery cell 40 and the bottom portion 32. The heat from the battery cell 40 is transferred to the bottom 32 along the heat flow path L1.
  • the sheet 1 according to the modified examples 1 and 2 may be replaced with any sheet 1 having the structures shown in FIGS. 1A, 2A, 2B and 2C.
  • the covering layer 10 includes a flange 11 provided on at least one of the width directions of the sheet 10 and a bag body 15 closed by the flange 11, and the heat conductive member 20 is present inside the bag body 15. Is also good.
  • the heat conductive member 20 may be a liquid or a fluid semi-solid body.
  • the liquid or semi-solid body may contain a carbon filler.
  • the heat conductive member 20 may include a liquid or a semi-solid body arranged on the outside rolled in an arc shape and a solid plate arranged on the inside arranged in an arc shape.
  • a high adhesion means for enhancing the adhesion between the coating layer 10 and the heat conductive member 20 may be provided between the coating layer 10 and the heat conductive member 20.
  • the heat radiating structures 3 and 4 and the battery 30 may be provided with the heat radiating member 2 according to the modified examples 1 and 2.
  • the flanges 11 are not provided on both sides of the sheet 1 in the width direction, but may be provided only on one side in the width direction, or may be provided at a total of four locations in the width direction and the length direction.
  • the bag body 15 is preferably in a sealed state when a liquid or semi-solid heat conductive member 20 is contained therein. However, when the solid plate 25 is provided inside the bag body 15 without including the heat conductive member 20, the bag body 15 may have a hole leading to the outside.
  • the heat source includes not only the battery cell 40 but also all objects that generate heat such as a circuit board and an electronic device body.
  • the heat source may be an electronic component such as a capacitor and an IC chip.
  • the cooling medium 35 may be not only cooling water but also an organic solvent, liquid nitrogen, or a cooling gas. Only one heat radiating member 2 may be provided in the battery 30. Further, the heat dissipation structures 3 and 4 may be arranged in a structure other than the battery 30, for example, an electronic device, a home appliance, a power generation device, or the like.
  • the electronic device includes a circuit board including electronic components and a heat sink arranged on a surface (rear surface) opposite to the electronic components of the circuit board, and is described above between the circuit board and the heat sink.
  • the heat radiating member 2 or the heat radiating structures 3 and 4 may be interposed.
  • the electronic device includes a circuit board including electronic components and a heat sink arranged on a surface (surface) of the circuit board on the electronic component side, and the heat radiation member 2 or heat dissipation described above is provided between the electronic components and the heat sink. Structures 3 and 4 may be interposed.
  • the sheet 1 does not necessarily have to be long.
  • the plurality of components of each of the above-described embodiments and modifications can be freely combined except when they cannot be combined with each other.
  • the heat radiating member 2 according to various modifications shown in FIGS. 3A, 3B, 3C, 3D and 3E can be provided in the heat radiating structures 3 and 4 or the battery 30.
  • the present invention can be used in fields where it is necessary to enhance heat conduction from a heat source to a cooling portion or heat conduction between heat sources.

Abstract

[Problem] To provide: a heat dissipation member that can be adapted to various forms of heat source, has excellent elastic deformability, and has high heat dissipation properties and electrical insulation properties; a heat dissipation structure; and a battery.　[Solution] The present invention pertains to: a heat dissipation member 2 for enhancing heat dissipation from a heat source, the heat dissipation member 2 having a form in which a sheet 1 is curved in an arcuate shape, the sheet 1 being provided with a heat conduction member 20 and a coating layer 10 coating the outside of the heat conduction member 20; a heat dissipation structure comprising two or more heat dissipation members 2; and a battery comprising a heat dissipation member 2.

Description

放熱部材、放熱構造体およびバッテリーHeat dissipation member, heat dissipation structure and battery クロスリファレンスCross reference
　本出願は、２０２０年８月１２日に日本国で出願された特願２０２０－１３６２１０に基づき優先権を主張し、当該出願に記載された内容は、本明細書に援用する。また、本願において引用した特許、特許出願及び文献に記載された内容は、本明細書に援用する。 This application claims priority based on Japanese Patent Application No. 2020-136210 filed in Japan on August 12, 2020, and the contents described in the application are incorporated herein by reference. In addition, the contents described in the patents, patent applications and documents cited in the present application are incorporated herein by reference.
　本発明は、放熱部材、放熱構造体およびバッテリーに関する。 The present invention relates to a heat radiating member, a heat radiating structure, and a battery.
　自動車、航空機、船舶あるいは家庭用若しくは業務用電子機器の制御システムは、より高精度かつ複雑化してきており、それに伴って、回路基板上の小型電子部品の集積密度が増加の一途を辿っている。この結果、回路基板周辺の発熱による電子部品の故障や短寿命化を解決することが強く望まれている。 Control systems for automobiles, aircraft, ships or household or commercial electronic devices are becoming more accurate and complex, and the density of small electronic components on circuit boards is increasing. .. As a result, it is strongly desired to solve the failure and shortening of the life of electronic components due to heat generation around the circuit board.
　回路基板からの速やかな放熱を実現するには、従来から、回路基板自体を放熱性に優れた材料で構成し、ヒートシンクを取り付け、あるいは冷却ファンを駆動するといった手段を単一で若しくは複数組み合わせて行われている。これらの内、回路基板自体を放熱性に優れた材料、例えばダイヤモンド、窒化アルミニウム（ＡｌＮ）、立方晶窒化ホウ素（ｃＢＮ）等から構成する方法は、回路基板のコストを極めて高くしてしまう。また、冷却ファンの配置は、ファンという回転機器の故障、故障防止のためのメンテナンスの必要性や設置スペースの確保が難しいという問題を生じる。これに対して、放熱フィンは、熱伝導性の高い金属（例えば、アルミニウム）を用いた柱状あるいは平板状の突出部位を数多く形成することによって表面積を大きくして放熱性をより高めることのできる簡易な部材であるため、放熱部品として汎用的に用いられている（特許文献１を参照）。 In order to realize quick heat dissipation from the circuit board, the circuit board itself has traditionally been made of a material with excellent heat dissipation, and a single or multiple means such as attaching a heat sink or driving a cooling fan have been used. It is done. Of these, a method in which the circuit board itself is made of a material having excellent heat dissipation, such as diamond, aluminum nitride (AlN), cubic boron nitride (cBN), etc., makes the cost of the circuit board extremely high. Further, the arrangement of the cooling fan causes a problem that a rotating device called a fan fails, maintenance is required to prevent the failure, and it is difficult to secure an installation space. On the other hand, the heat radiating fin is a simple one that can increase the surface area and further improve the heat radiating property by forming a large number of columnar or flat plate-shaped projecting portions using a metal having high thermal conductivity (for example, aluminum). Since it is a member, it is generally used as a heat dissipation component (see Patent Document 1).
　ところで、現在、世界中で、地球環境への負荷軽減を目的として、従来からのガソリン車あるいはディーゼル車を徐々に電気自動車に転換しようとする動きが活発化している。特に、フランス、オランダ、ドイツをはじめとする欧州諸国の他、中国でも、電気自動車の普及が進行してきている。電気自動車の普及には、高性能バッテリーの開発の他、多数の充電スタンドの設置などが必要となる。特に、リチウム系の自動車用バッテリーの充放電機能を高めるための技術開発が重要である。上記自動車バッテリーは、摂氏６０度以上の高温下では充放電の機能を十分に発揮できないことが良く知られている。このため、先に説明した回路基板と同様、バッテリーにおいても、放熱性を高めることが重要視されている。 By the way, at present, there are active movements around the world to gradually convert conventional gasoline-powered vehicles or diesel-powered vehicles to electric vehicles for the purpose of reducing the burden on the global environment. In particular, electric vehicles are becoming more widespread in China as well as in European countries such as France, the Netherlands, and Germany. In order to popularize electric vehicles, it is necessary to develop high-performance batteries and install a large number of charging stations. In particular, it is important to develop technology to enhance the charge / discharge function of lithium-based automobile batteries. It is well known that the above-mentioned automobile battery cannot fully exhibit the charge / discharge function at a high temperature of 60 degrees Celsius or higher. For this reason, it is important to improve the heat dissipation of the battery as well as the circuit board described above.
　バッテリーの速やかな放熱を実現するには、アルミニウム等の熱伝導性に優れた金属製の筐体に水冷パイプを配置し、当該筐体にバッテリーセルを多数配置し、バッテリーセルと筐体の底面との間に密着性のゴムシートを挟んだ構造が採用されている。このような構造のバッテリーでは、バッテリーセルは、ゴムシートを通じて筐体に伝熱して、水冷によって効果的に除熱される。 In order to quickly dissipate heat from the battery, place a water-cooled pipe in a metal housing with excellent thermal conductivity such as aluminum, place a large number of battery cells in the housing, and place the battery cell and the bottom of the housing. A structure in which an adhesive rubber sheet is sandwiched between and is adopted. In a battery having such a structure, the battery cell transfers heat to the housing through a rubber sheet and is effectively removed by water cooling.
特開２００８－２４３９９９Japanese Patent Application Laid-Open No. 2008-24399
　しかし、上述のような従来のバッテリーにおいて、ゴムシートは、アルミニウムやグラファイトと比べて熱伝導性が低いため、バッテリーセルから筐体に効率よく熱を移動させることが難しい。また、ゴムシートに代えてグラファイト等のスペーサを挟む方法も考えられるが、複数のバッテリーセルの下面が平らではなく段差を有することから、バッテリーセルとスペーサとの間に隙間が生じ、伝熱効率が低下する。かかる一例にもみられるように、バッテリーセルは種々の形態（段差等の凹凸あるいは非平滑な表面状態を含む）をとり得ることから、バッテリーセルの種々の形態に順応可能であって高い伝熱効率を実現することの要望が高まっている。 However, in the conventional battery as described above, since the rubber sheet has lower thermal conductivity than aluminum or graphite, it is difficult to efficiently transfer heat from the battery cell to the housing. A method of sandwiching a spacer such as graphite instead of a rubber sheet is also conceivable, but since the lower surfaces of a plurality of battery cells are not flat and have steps, a gap is created between the battery cells and the spacer, and the heat transfer efficiency is improved. descend. As can be seen in such an example, since the battery cell can take various forms (including unevenness such as a step or a non-smooth surface state), it can be adapted to various forms of the battery cell and has high heat transfer efficiency. There is a growing demand for realization.
　本出願人は、上記要望に応えるために、本発明に先立ち、グラファイトあるいは金属製の放熱部材を熱源に接触させて熱源からの放熱性を高めることを提案してきた。しかし、放熱性のみならず、電気的な絶縁性も高めることが必要な場合もある。また、熱源との密着性をさらに高めて放熱性を向上させることが期待されている。このような点は、バッテリーセルのみならず、回路基板、電子部品あるいは電子機器本体のような他の熱源にも通じる。このような要望に応えることは、「すべての人々の、安価かつ信頼できる持続可能な近代的エネルギーへのアクセスを確保する」という本出願人の持続可能な開発目標の達成にも資する。 Prior to the present invention, the applicant has proposed to bring a graphite or metal heat radiating member into contact with a heat source to improve the heat radiating property from the heat source. However, it may be necessary to improve not only heat dissipation but also electrical insulation. Further, it is expected that the adhesion with the heat source is further enhanced to improve the heat dissipation. Such a point leads not only to the battery cell but also to other heat sources such as circuit boards, electronic components or the main body of electronic devices. Responding to such demands will also contribute to the achievement of Applicant's Sustainable Development Goals of "Ensuring access to cheap, reliable and sustainable modern energy for all."
　本発明は、上記課題に鑑みてなされたものであり、熱源の種々の形態に順応可能であって、弾性変形性に富み、放熱性および電気絶縁性の高い放熱部材、放熱構造体、およびバッテリーを提供することを目的とする。 The present invention has been made in view of the above problems, and is adaptable to various forms of heat sources, has abundant elastic deformability, and has high heat dissipation and electrical insulation properties, a heat dissipation structure, and a battery. The purpose is to provide.
（１）上記目的を達成するための一実施形態に係る放熱部材は、熱源からの放熱を高める放熱部材であって、シートを弧状に丸めた形態を有しており、前記シートは、熱伝導部材と、前記熱伝導部材の外側を被覆する被覆層と、を備える。
（２）別の実施形態に係る放熱部材は、好ましくは、長尺状の前記シートをスパイラル状に巻回させながら進行する形態を有していても良い。
（３）別の実施形態に係る放熱部材では、好ましくは、前記被覆層は、弧状に丸めた外側の面の厚みを、弧状に丸めた内側の面の厚みより薄く構成されていても良い。
（４）別の実施形態に係る放熱部材では、好ましくは、前記被覆層は、前記シートの幅方向の少なくとも一方に備えるフランジと、前記フランジによって閉じられた袋体と、を備え、前記熱伝導部材は、前記袋体の内部に存在していても良い。
（５）別の実施形態に係る放熱部材では、好ましくは、前記熱伝導部材は、液体若しくは流動可能な半固形体であっても良い。
（６）別の実施形態に係る放熱部材では、好ましくは、前記液体若しくは前記半固形体は、炭素フィラーを含んでいても良い。
（７）別の実施形態に係る放熱部材では、好ましくは、前記熱伝導部材は、弧状に丸めた外側に配置される前記液体若しくは前記半固形体と、弧状に丸めた内側に配置される固形状のプレートと、を含んでいても良い。
（８）別の実施形態に係る放熱部材は、好ましくは、前記被覆層と前記熱伝導部材との間に、前記被覆層と前記熱伝導部材との密着性を高めるための高密着手段を備えていても良い。
（９）一実施形態に係る放熱構造体は、上述のいずれかの放熱部材を２以上備える。
（１０）一実施形態に係るバッテリーは、筐体内に、１または２以上の熱源としてのバッテリーセルを備えたバッテリーであって、前記バッテリーセルと前記筐体との間に、上述のいずれかの放熱部材を備える。 (1) The heat dissipation member according to the embodiment for achieving the above object is a heat dissipation member that enhances heat dissipation from a heat source, and has a form in which a sheet is rolled into an arc shape, and the sheet has heat conduction. It includes a member and a coating layer that covers the outside of the heat conductive member.
(2) The heat radiating member according to another embodiment may preferably have a form in which the long sheet is spirally wound and advanced.
(3) In the heat radiating member according to another embodiment, preferably, the coating layer may be configured such that the thickness of the outer surface rounded in an arc shape is thinner than the thickness of the inner surface rounded in an arc shape.
(4) In the heat dissipation member according to another embodiment, preferably, the coating layer includes a flange provided on at least one of the width directions of the sheet and a bag body closed by the flange, and the heat conduction is provided. The member may be present inside the bag body.
(5) In the heat radiating member according to another embodiment, preferably, the heat conductive member may be a liquid or a flowable semi-solid body.
(6) In the heat radiating member according to another embodiment, preferably, the liquid or the semi-solid body may contain a carbon filler.
(7) In the heat dissipation member according to another embodiment, preferably, the heat conductive member is the liquid or the semi-solid body arranged on the outside rolled in an arc shape and the solid arranged on the inside arranged in an arc shape. May include a shaped plate and.
(8) The heat radiating member according to another embodiment preferably includes a high adhesion means for enhancing the adhesion between the coating layer and the heat conductive member between the coating layer and the heat conductive member. You may have.
(9) The heat radiating structure according to the embodiment includes two or more heat radiating members according to any one of the above.
(10) The battery according to one embodiment is a battery having one or more battery cells as heat sources in a housing, and any of the above-mentioned batteries is provided between the battery cells and the housing. It is equipped with a heat dissipation member.
　本発明によれば、熱源の種々の形態に順応可能であって、弾性変形性に富み、放熱性および電気絶縁性の高い放熱部材、放熱構造体、およびバッテリーを提供できる。 According to the present invention, it is possible to provide a heat radiating member, a heat radiating structure, and a battery that are adaptable to various forms of a heat source, are rich in elastic deformability, and have high heat dissipation and electrical insulation.
図１Ａは、本発明の実施形態に係る放熱部材に用いる長尺状のシートの平面図を示す。FIG. 1A shows a plan view of a long sheet used for a heat radiating member according to an embodiment of the present invention. 図１Ｂは、図１Ａのシートを用いた放熱部材の平面図を示す。FIG. 1B shows a plan view of a heat radiating member using the sheet of FIG. 1A. 図１Ｃは、図１Ｂの放熱部材をＡ－Ａ線にて切断したときの拡大断面図を示す。FIG. 1C shows an enlarged cross-sectional view when the heat radiating member of FIG. 1B is cut along the line AA. 図２Ａは、図１Ｃのフランジを備えた被覆層の製造例を示す。FIG. 2A shows an example of manufacturing a coating layer provided with the flange of FIG. 1C. 図２Ｂは、図２Ａとは別の製造例を示す。FIG. 2B shows a manufacturing example different from that of FIG. 2A. 図２Ｃは、図２Ａおよび図２Ｂとは別の製造例を示す。FIG. 2C shows a manufacturing example different from that of FIGS. 2A and 2B. 図３Ａは、図１Ｃの放熱部材の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。FIG. 3A shows a modified example of the heat dissipation member of FIG. 1C in an enlarged cross-sectional view taken along the line AA similar to that of FIG. 1C. 図３Ｂは、図３Ａとは別の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。FIG. 3B shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from that of FIG. 3A. 図３Ｃは、図３Ａおよび図３Ｂとは別の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。FIG. 3C shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A and 3B. 図３Ｄは、図３Ａ、図３Ｂおよび図３Ｃとは別の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。FIG. 3D shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B and 3C. 図３Ｅは、図３Ａ、図３Ｂ、図３Ｃおよび図３Ｄとは別の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。FIG. 3E shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B, 3C and 3D. 図４は、一実施形態に係る放熱構造体の平面図を示す。FIG. 4 shows a plan view of the heat dissipation structure according to the embodiment. 図５は、図４の放熱構造体の変形例の平面図を示す。FIG. 5 shows a plan view of a modified example of the heat dissipation structure of FIG. 図６は、図１Ｂの放熱部材を２以上備えるバッテリーの縦断面図を示す。FIG. 6 shows a vertical cross-sectional view of a battery including two or more heat dissipation members of FIG. 1B. 図７は、図４の放熱構造体の上に、バッテリーセルの側面を接触させるように横置きにしたときの断面図、その一部拡大図および充放電時にバッテリーセルが膨張した際の一部断面図をそれぞれ示す。FIG. 7 is a cross-sectional view when the battery cell is horizontally placed on the heat radiation structure of FIG. 4 so as to be in contact with the side surface of the battery cell, a partially enlarged view thereof, and a part when the battery cell expands during charging and discharging. Sectional views are shown respectively. 図８Ａは、変形例１に係る放熱部材の製造過程と当該放熱部材の正面図を示す。FIG. 8A shows a manufacturing process of the heat radiating member according to the first modification and a front view of the heat radiating member. 図８Ｂは、変形例２に係る放熱部材の正面図を示す。FIG. 8B shows a front view of the heat radiating member according to the second modification.
　１・・・シート、２・・・放熱部材、３，４・・・放熱構造体、１０・・・被覆層、１１・・・フランジ、１５・・・袋体、２０・・・熱伝導部材、２５・・・固形状のプレート（熱伝導部材の一例）、２６・・・易密着面（高密着手段の一例）、２７・・・接着層（高密着手段の一例）、３０・・・バッテリー、３１・・・筐体、４０・・・バッテリーセル（熱源の一例）。 1 ... Sheet, 2 ... Heat dissipation member, 3,4 ... Heat dissipation structure, 10 ... Coating layer, 11 ... Flange, 15 ... Bag body, 20 ... Heat conduction member , 25 ... Solid plate (example of heat conductive member), 26 ... Easy adhesion surface (example of high adhesion means), 27 ... Adhesive layer (example of high adhesion means), 30 ... Battery, 31 ... housing, 40 ... battery cell (an example of heat source).
　次に、本発明の実施形態について、図面を参照して説明する。なお、以下に説明する実施形態は、特許請求の範囲に係る発明を限定するものではなく、また、実施形態の中で説明されている諸要素及びその組み合わせの全てが本発明の解決手段に必須であるとは限らない。 Next, an embodiment of the present invention will be described with reference to the drawings. It should be noted that the embodiments described below do not limit the invention according to the claims, and all of the elements and combinations thereof described in the embodiments are indispensable for the means for solving the present invention. It is not always the case.
１．放熱部材
　本発明の実施形態に係る放熱部材について説明する。 1. 1. Heat-dissipating member A heat-dissipating member according to an embodiment of the present invention will be described.
　図１Ａは、本発明の実施形態に係る放熱部材に用いる長尺状のシートの平面図を示す。図１Ｂは、図１Ａのシートを用いた放熱部材の平面図を示す。図１Ｃは、図１Ｂの放熱部材をＡ－Ａ線にて切断したときの拡大断面図を示す。 FIG. 1A shows a plan view of a long sheet used for a heat radiating member according to an embodiment of the present invention. FIG. 1B shows a plan view of a heat radiating member using the sheet of FIG. 1A. FIG. 1C shows an enlarged cross-sectional view when the heat radiating member of FIG. 1B is cut along the line AA.
　一実施形態に係る放熱部材２は、熱源からの放熱を高める放熱部材であって、シート１を弧状に丸めた形態を有する。この実施形態では、シート１は、長尺状のシートである。また、シート１は、弧状に連続的に丸め、いわゆるスパイラル状に巻回させながら進行する形態を有する。スパイラル状に巻回させながら進行する形態は、弧状に丸めた形態に含まれる。長尺状のシート１を帯状のシート１と称しても良い。シート１は、熱伝導部材２０と、熱伝導部材２０の外側を被覆する被覆層１０と、を備える。この実施形態では、放熱部材２は、スパイラル状に巻回された長尺部材である。このため、放熱部材２は、その厚さ方向にてシート１の幅の単位で凹凸を形成するように変形可能であって、かつ放熱部材２の長さ方向に伸縮可能である。 The heat radiating member 2 according to one embodiment is a heat radiating member that enhances heat dissipation from a heat source, and has a form in which the sheet 1 is rolled into an arc shape. In this embodiment, the sheet 1 is a long sheet. Further, the sheet 1 has a form in which the sheet 1 is continuously rolled in an arc shape and is wound in a so-called spiral shape. The morphology that progresses while being wound in a spiral shape is included in the morphology that is rolled into an arc shape. The long sheet 1 may be referred to as a band-shaped sheet 1. The sheet 1 includes a heat conductive member 20 and a coating layer 10 that covers the outside of the heat conductive member 20. In this embodiment, the heat radiating member 2 is a long member wound in a spiral shape. Therefore, the heat radiating member 2 can be deformed so as to form irregularities in units of the width of the sheet 1 in the thickness direction thereof, and can be expanded and contracted in the length direction of the heat radiating member 2.
　シート１を構成している被覆層１０は、好ましくは、シート１の幅方向の少なくとも一方（この実施形態では両方）に備えるフランジ１１と、フランジ１１によって閉じられた袋体１５と、を備える。熱伝導部材２０は、袋体１５の内部に存在している。フランジ１１は、より好ましくは、シート１の全外周縁に形成されていて、熱伝導部材２０を封止した部分である。フランジ１１は、例えば、以下のような方法で製造可能である。 The covering layer 10 constituting the sheet 1 preferably includes a flange 11 provided on at least one of the width directions of the sheet 1 (both in this embodiment), and a bag body 15 closed by the flange 11. The heat conductive member 20 exists inside the bag body 15. The flange 11 is more preferably a portion formed on the entire outer peripheral edge of the sheet 1 and sealing the heat conductive member 20. The flange 11 can be manufactured, for example, by the following method.
　図２Ａは、図１Ｃのフランジを備えた被覆層の製造例を示す。図２Ｂは、図２Ａとは別の製造例を示す。図２Ｃは、図２Ａおよび図２Ｂとは別の製造例を示す。 FIG. 2A shows an example of manufacturing a coating layer provided with the flange of FIG. 1C. FIG. 2B shows a manufacturing example different from that of FIG. 2A. FIG. 2C shows a manufacturing example different from that of FIGS. 2A and 2B.
　図２Ａは、同種若しくは複数種の熱可塑性樹脂を熱溶着する方法の断面視を示す。まず、予めフランジ１１を備え断面Ｕ字状に成形された被覆層１０を用意する。次に、被覆層１０の溝に熱伝導部材２０若しくは硬化して熱伝導部材２０となる硬化性組成物を充填する。最後に、後述する内側シート１２に相当する蓋を、充填物およびフランジ１１の上から熱溶着する。ここで、熱溶着のより具体的な手法としては、超音波溶着、振動溶着、高周波溶着、レーザー溶着などを例示できる。 FIG. 2A shows a cross-sectional view of a method of heat welding the same or a plurality of types of thermoplastic resins. First, a covering layer 10 having a flange 11 and formed into a U-shaped cross section is prepared first. Next, the groove of the coating layer 10 is filled with the heat conductive member 20 or a curable composition that is cured to become the heat conductive member 20. Finally, the lid corresponding to the inner sheet 12, which will be described later, is heat-welded from above the filler and the flange 11. Here, as a more specific method of heat welding, ultrasonic welding, vibration welding, high frequency welding, laser welding and the like can be exemplified.
　図２Ｂは、押出チューブ方式の断面視を示す。単色若しくは多色押出にて成形されたチューブ（袋体１５の内部に相当）に、熱伝導部材２０若しくは硬化して熱伝導部材２０となる硬化性組成物を充填する。フランジ１１は、押出成形時に形成される。こうして、熱伝導部材２０を内部に備える被覆層１０が完成する。 FIG. 2B shows a cross-sectional view of the extrusion tube method. A tube (corresponding to the inside of the bag 15) formed by monochromatic or multicolor extrusion is filled with a heat conductive member 20 or a curable composition that is cured to become a heat conductive member 20. The flange 11 is formed during extrusion molding. In this way, the covering layer 10 having the heat conductive member 20 inside is completed.
　図２Ｃは、ラミネート方式の断面視を示す。まず、後述する外側シート１３に相当するフィルム上に熱伝導部材２０用の成分を含むインクにて印刷する。次に、印刷面に対して、後述する内側シート１２に相当するフィルムを貼り付ける。印刷層の外側には、２枚のフィルムにて形成されたフランジ１１が形成される。こうして、熱伝導部材２０を内部に備えるラミネート状の被覆層１０が完成する。 FIG. 2C shows a cross-sectional view of the laminating method. First, printing is performed with ink containing a component for the heat conductive member 20 on a film corresponding to the outer sheet 13 described later. Next, a film corresponding to the inner sheet 12 described later is attached to the printed surface. A flange 11 formed of two films is formed on the outside of the print layer. In this way, the laminated coating layer 10 having the heat conductive member 20 inside is completed.
　なお、上述の溶着方法は、上記の例に限定されない。被覆層１０の袋体１５の内部に存在する熱伝導部材２０が密閉可能であれば、如何なる溶着方法、さらには接着方法を用いることもできる。 The above-mentioned welding method is not limited to the above-mentioned example. Any welding method or further bonding method can be used as long as the heat conductive member 20 existing inside the bag body 15 of the coating layer 10 can be sealed.
　シート１を所定長さに切って放熱部材２を製造する場合には、シート１の長さ方向の端部は、フランジ１１の無い端部となる。その場合には、当該長さ方向の端部を封止して、フランジ１１付きの放熱部材２を製造することもできる。フランジ１１は、それ自体の剛性に起因して、シート１をスパイラル状に巻回した際に放熱部材２の弾性を維持するのに役立つ、以下、被覆層１０および熱伝導部材２０について詳述する。 When the heat radiating member 2 is manufactured by cutting the sheet 1 to a predetermined length, the end portion of the sheet 1 in the length direction is the end portion without the flange 11. In that case, the heat radiating member 2 with the flange 11 can be manufactured by sealing the end portion in the length direction. The flange 11 is useful for maintaining the elasticity of the heat radiating member 2 when the sheet 1 is spirally wound due to its rigidity. Hereinafter, the coating layer 10 and the heat conductive member 20 will be described in detail. ..
（１）被覆層
　被覆層１０は、スパイラル状の放熱部材２の内側に位置する内側シート１２と、スパイラル状の放熱部材２の外側に位置する外側シート１３と、内側シート１２の幅方向両側に突出するフランジ１１と、を備える。内側シート１２と外側シート１３によって閉じられ領域は、袋体１５を構成する。袋体１５は、その断面視にて、内側シート１２から突出した部位である。袋体１５の突出面は、好ましくは、湾弧状の面である。フランジ１１は、この実施形態では、内側シート１２と面一に構成されているが、面一に構成されていなくとも良い。被覆層１０は、好ましくは、スパイラルの外側の面の厚みを、スパイラルの内側の面の厚みより薄く構成されている。すなわち、外側シート１３の厚み（Ｔ１）は、内側シート１２の厚み（Ｔ２）より小さい。外側シート１３は、熱源と接触する部分である。外側シート１３の厚み（Ｔ１）を可能な限り薄くすることにより、熱源から熱伝導部材２０への熱伝導性を高めることができる。外側シート１３の厚み（Ｔ１）は、好ましくは、熱伝導部材２０の厚さ（シート１の厚さ方向と同じ）より小さい。また、内側シート１２と外側シート１３の各材質は同一でも、あるいは異なっていても良い。 (1) Coating layer The coating layer 10 includes an inner sheet 12 located inside the spiral heat-dissipating member 2, an outer sheet 13 located outside the spiral heat-dissipating member 2, and both sides of the inner sheet 12 in the width direction. A protruding flange 11 and a flange 11 are provided. The area closed by the inner sheet 12 and the outer sheet 13 constitutes the bag body 15. The bag body 15 is a portion protruding from the inner sheet 12 in the cross-sectional view thereof. The protruding surface of the bag body 15 is preferably a bay arc-shaped surface. In this embodiment, the flange 11 is configured to be flush with the inner sheet 12, but it does not have to be flush with the inner sheet 12. The covering layer 10 is preferably configured such that the thickness of the outer surface of the spiral is thinner than the thickness of the inner surface of the spiral. That is, the thickness (T1) of the outer sheet 13 is smaller than the thickness (T2) of the inner sheet 12. The outer sheet 13 is a portion that comes into contact with a heat source. By making the thickness (T1) of the outer sheet 13 as thin as possible, the heat conductivity from the heat source to the heat conductive member 20 can be enhanced. The thickness (T1) of the outer sheet 13 is preferably smaller than the thickness of the heat conductive member 20 (same as the thickness direction of the sheet 1). Further, the materials of the inner sheet 12 and the outer sheet 13 may be the same or different.
　被覆層１０は、熱源との電気絶縁性と、熱源との密着性とを共に高め、熱伝導部材２０を被覆して保護可能な層である。被覆層１０は、好ましくは、熱伝導部材２０に比べて電気絶縁性の高い層である。具体的には、被覆層１０の電気抵抗率は、好ましくは、１．０×１０７（Ｏｈｍ・ｍ）以上、さらに好ましくは、１．０×１０８（Ｏｈｍ・ｍ）以上である。また、被覆層１０は、好ましくは、熱伝導部材２０に比べて低硬度の層である。 The coating layer 10 is a layer capable of covering and protecting the heat conductive member 20 by enhancing both the electrical insulation property with the heat source and the adhesion with the heat source. The coating layer 10 is preferably a layer having higher electrical insulation than the heat conductive member 20. Specifically, the electrical resistivity of the coating layer 10 is preferably 1.0 × 10 7 (Ohm · m) or more, and more preferably 1.0 × 10 8 (Ohm · m) or more. Further, the coating layer 10 is preferably a layer having a lower hardness than the heat conductive member 20.
　被覆層１０は、好ましくは、シリコーンゴム、ウレタンゴム、イソプレンゴム、エチレンプロピレンゴム、天然ゴム、エチレンプロピレンジエンゴム、ニトリルゴム（ＮＢＲ）あるいはスチレンブタジエンゴム（ＳＢＲ）等の熱硬化性エラストマー；　ウレタン系、エステル系、スチレン系、オレフィン系、ブタジエン系、フッ素系等の熱可塑性エラストマー、あるいはそれらの複合物等を含むように構成される。被覆層１０は、耐熱性の樹脂、例えば、ポリフェニレンスルフィド（ＰＰＳ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、ポリアミドイミド（ＰＡＩ）、芳香族ポリアミド（アラミド繊維）等で形成されていても良い。被覆層１０は、熱源から伝わる熱によって溶融あるいは分解等せずにその形態を維持できる程度の耐熱性の高い材料から構成されるのが好ましい。この実施形態では、被覆層１０は、より好ましくは、ウレタン系エラストマー中にシリコーンを含浸したもの、あるいはシリコーンゴムにより構成される。被覆層１０は、その熱伝導性を少しでも高めるために、ゴム中にＡｌ２Ｏ３、ＡｌＮ、ｃＢＮ、ｈＢＮ、ダイヤモンドの粒子等に代表されるフィラーを分散して構成されていても良い。また、「被覆層」は、柔軟性に富み、熱源の表面に密着可能に弾性変形可能な部材を意味し、かかる意味では「ゴム状弾性体」と読み替えることもできる。被覆層１０は、樹脂やゴム等から形成されたスポンジあるいはソリッド（スポンジのような多孔質ではない構造のもの）で構成することも可能である。 The coating layer 10 is preferably a thermoplastic elastomer such as silicone rubber, urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber, nitrile rubber (NBR) or styrene butadiene rubber (SBR); urethane-based , Ester-based, styrene-based, olefin-based, butadiene-based, fluorine-based and other thermoplastic elastomers, or composites thereof. The coating layer 10 may be formed of a heat-resistant resin such as polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyamideimide (PAI), aromatic polyamide (aramid fiber), or the like. The coating layer 10 is preferably made of a material having high heat resistance to the extent that its morphology can be maintained without being melted or decomposed by the heat transferred from the heat source. In this embodiment, the coating layer 10 is more preferably composed of a urethane-based elastomer impregnated with silicone or a silicone rubber. The coating layer 10 may be configured by dispersing a filler typified by Al 2 O 3 , AlN, cBN, hBN, diamond particles, or the like in rubber in order to enhance its thermal conductivity as much as possible. Further, the "coating layer" means a member having high flexibility and elastically deformable so as to be in close contact with the surface of a heat source, and in this sense, it can be read as "rubber-like elastic body". The coating layer 10 can also be made of a sponge or a solid (a structure that is not porous like a sponge) formed of resin, rubber, or the like.
（２）熱伝導部材
　熱伝導部材２０は、熱源から被覆層１０を経由して熱を受け取り、被覆層１０を経由して熱源以外の部位（冷却部位あるいは別の熱源）に熱を伝える役割を有する。熱伝導部材２０は、被覆層１０に比べて、熱伝導率の高い部材である。熱伝導部材２０は、必ずしも電気伝導性の高い部材である必要はない。熱伝導部材２０は、電気伝導性の高低を問わず、熱伝導性に優れていれば良い。熱伝導部材２０が電気伝導性と熱伝導性の両方に優れている場合でも、熱源と熱伝導部材２０との間に被覆層１０が介在しているため、熱源と熱伝導部材２０との絶縁性を確保できる。 (2) Heat conduction member The heat conduction member 20 receives heat from a heat source via a coating layer 10 and transfers heat to a portion (cooling portion or another heat source) other than the heat source via the coating layer 10. Have. The heat conductive member 20 is a member having a higher thermal conductivity than the coating layer 10. The heat conductive member 20 does not necessarily have to be a member having high electrical conductivity. The heat conductive member 20 may be excellent in heat conductivity regardless of the level of electrical conductivity. Even when the heat conductive member 20 is excellent in both electric conductivity and heat conductivity, since the coating layer 10 is interposed between the heat source and the heat conductive member 20, the heat source and the heat conductive member 20 are insulated from each other. You can secure sex.
　この実施形態では、熱伝導部材２０は、好ましくは、液体若しくは流動可能な半固形体である。熱伝導部材２０は、オイル、その中でもシリコーンオイルを好適に含む。シリコーンオイルは、好ましくは、シロキサン結合が２０００以下の直鎖構造の分子から成る。シリコーンオイルは、ストレートシリコーンオイルと、変性シリコーンオイルとに大別される。ストレートシリコーンオイルとしては、ジメチルシリコーンオイル、メチルフェニルシリコーンオイル、メチルハイドロジェンシリコーンオイルを例示できる。変性シリコーンオイルとしては、反応性シリコーンオイル、非反応性シリコーンオイルを例示できる。反応性シリコーンオイルは、例えば、アミノ変性タイプ、エポキシ変性タイプ、カルボキシ変性タイプ、カルビノール変性タイプ、メタクリル変性タイプ、メルカプト変性タイプ、フェノール変性タイプ等の各種シリコーンオイルを含む。非反応性シリコーンオイルは、ポリエーテル変性タイプ、メチルスチリル変性タイプ、アルキル変性タイプ、高級脂肪酸エステル変性タイプ、親水性特殊変性タイプ、高級脂肪酸含有タイプ、フッ素変性タイプ等の各種シリコーンオイルを含む。 In this embodiment, the heat conductive member 20 is preferably a liquid or a fluid semi-solid body. The heat conductive member 20 preferably contains oil, particularly silicone oil. Silicone oils preferably consist of molecules with a linear structure having a siloxane bond of 2000 or less. Silicone oil is roughly classified into straight silicone oil and modified silicone oil. Examples of the straight silicone oil include dimethyl silicone oil, methyl phenyl silicone oil, and methyl hydrogen silicone oil. Examples of the modified silicone oil include reactive silicone oil and non-reactive silicone oil. The reactive silicone oil includes, for example, various silicone oils such as an amino-modified type, an epoxy-modified type, a carboxy-modified type, a carbinol-modified type, a methacryl-modified type, a mercapto-modified type, and a phenol-modified type. The non-reactive silicone oil includes various silicone oils such as a polyether-modified type, a methylstyryl-modified type, an alkyl-modified type, a higher fatty acid ester-modified type, a hydrophilic special-modified type, a higher fatty acid-containing type, and a fluorine-modified type.
　オイルは、好ましくは、油分以外に、金属、セラミックスまたは炭素の１以上からなる熱伝導性フィラーを含む。金属としては、金、銀、銅、アルミニウム、ベリリウム、タングステンなどを例示できる。セラミックスとしては、アルミナ、窒化アルミニウム、キュービック窒化ホウ素、ヘキサゴナル窒化ホウ素などを例示できる。炭素としては、ダイヤモンド、グラファイト、ダイヤモンドライクカーボン、アモルファスカーボン、カーボンナノチューブなどを例示できる。熱伝導性フィラーとしては、グラファイト等の炭素フィラーをより好適に例示できる。フィラーは、粒状、針状、繊維状などの如何なる形状のものでも良い。 The oil preferably contains a thermally conductive filler composed of one or more of metal, ceramics or carbon, in addition to the oil component. Examples of the metal include gold, silver, copper, aluminum, beryllium, and tungsten. Examples of the ceramics include alumina, aluminum nitride, cubic boron nitride, and hexagonal boron nitride. Examples of carbon include diamond, graphite, diamond-like carbon, amorphous carbon, and carbon nanotubes. As the thermally conductive filler, a carbon filler such as graphite can be more preferably exemplified. The filler may have any shape such as granular, needle-shaped, and fibrous.
　また、熱伝導部材２０としては、グリースなどのペーストを例示できる。グリースは、主として、基油、増ちょう剤および添加剤を含む。添加剤として、上記例示した金属、セラミックスまたは炭素の１以上からなる熱伝導性フィラーを含めることができる。 Further, as the heat conductive member 20, a paste such as grease can be exemplified. Grease mainly contains base oils, thickeners and additives. As the additive, a thermally conductive filler consisting of one or more of the above-exemplified metals, ceramics or carbon can be included.
　図３Ａは、図１Ｃの放熱部材の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。図３Ｂは、図３Ａとは別の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。図３Ｃは、図３Ａおよび図３Ｂとは別の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。図３Ｄは、図３Ａ、図３Ｂおよび図３Ｃとは別の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。図３Ｅは、図３Ａ、図３Ｂ、図３Ｃおよび図３Ｄとは別の変形例を図１Ｃと同様のＡ－Ａ線拡大断面図で示す。 FIG. 3A shows a modified example of the heat radiating member of FIG. 1C in an enlarged cross-sectional view taken along the line AA similar to that of FIG. 1C. FIG. 3B shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from that of FIG. 3A. FIG. 3C shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A and 3B. FIG. 3D shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B and 3C. FIG. 3E shows an enlarged sectional view taken along line AA similar to FIG. 1C as a modification different from FIGS. 3A, 3B, 3C and 3D.
　図３Ａは、袋体１５の内部に、液体若しくは半固形体の熱伝導部材と、固形の熱伝導部材と、を含む放熱部材２を示す。すなわち、放熱部材２は、スパイラルの外側に配置される液体若しくは半固形体の熱伝導部材２０と、スパイラルの内側に配置される固形状のプレート２５と、を含む。固形状のプレート２５は、熱伝導部材２０と異なる別の熱伝導部材の一例である。液体若しくは半固形体の熱伝導部材２０は、熱源の表面形状に合わせて柔軟に変形して密着する機能を、固形状のプレート２５は、良好な熱の伝導を実現する機能を、それぞれ発揮可能である。固形状のプレート２５は、例えば、グラファイトに代表される炭素製の板、アルミニウムに代表される金属製の板、アルミナに代表されるセラミックス製の板である。以下、固形状のプレート２５の詳細およびバリエーションについて説明する。 FIG. 3A shows a heat radiating member 2 including a liquid or semi-solid heat conductive member and a solid heat conductive member inside the bag 15. That is, the heat radiating member 2 includes a liquid or semi-solid heat conductive member 20 arranged outside the spiral and a solid plate 25 arranged inside the spiral. The solid plate 25 is an example of another heat conductive member different from the heat conductive member 20. The liquid or semi-solid heat conductive member 20 can flexibly deform and adhere to the surface shape of the heat source, and the solid plate 25 can exhibit a function of realizing good heat conduction. Is. The solid plate 25 is, for example, a carbon plate typified by graphite, a metal plate typified by aluminum, and a ceramic plate typified by alumina. Hereinafter, details and variations of the solid plate 25 will be described.
　固形状のプレート２５は、その構成材料を問わないが、好ましくは炭素を含むシートであり、さらに好ましくは９０質量％以上を炭素から構成されるシートである。例えば、固形状のプレート２５に、樹脂を焼成して成るグラファイト製のフィルムを用いることもできる。ただし、固形状のプレート２５は、炭素と樹脂とを含むシートであっても良い。その場合、樹脂は、合成繊維でも良く、その場合には、樹脂として好適にはアラミド繊維を用いることができる。本願でいう「炭素」は、グラファイト、グラファイトより結晶性の低いカーボンブラック、ダイヤモンド、ダイヤモンドに近い構造を持つダイヤモンドライクカーボン等の炭素（元素記号：Ｃ）から成る如何なる構造のものも含むように広義に解釈される。固形状のプレート２５は、この実施形態では、樹脂に、グラファイト繊維やカーボン粒子を配合分散した材料を硬化させた薄いシートとすることができる。固形状のプレート２５は、メッシュ状に編んだカーボンファイバーであっても良く、さらには混紡してあっても混編みしてあっても良い。なお、グラファイト繊維、カーボン粒子あるいはカーボンファイバーといった各種フィラーも、すべて、炭素フィラーの概念に含まれる。 The solid plate 25 is not limited to its constituent material, but is preferably a sheet containing carbon, and more preferably a sheet composed of 90% by mass or more of carbon. For example, a graphite film formed by firing a resin can also be used for the solid plate 25. However, the solid plate 25 may be a sheet containing carbon and resin. In that case, the resin may be synthetic fiber, and in that case, aramid fiber can be preferably used as the resin. The term "carbon" as used in the present application is broadly defined to include any structure composed of carbon (element symbol: C) such as graphite, carbon black having lower crystallinity than graphite, diamond, and diamond-like carbon having a structure similar to diamond. Is interpreted as. In this embodiment, the solid plate 25 can be a thin sheet obtained by curing a material in which graphite fibers or carbon particles are mixed and dispersed in a resin. The solid plate 25 may be carbon fibers knitted in a mesh shape, and may be blended or knitted. In addition, various fillers such as graphite fiber, carbon particles or carbon fiber are all included in the concept of carbon filler.
　固形状のプレート２５を炭素と樹脂とを備えるシートとする場合には、当該樹脂が固形状のプレート２５の全質量に対して５０質量％を超えていても、あるいは５０質量％以下であっても良い。すなわち、固形状のプレート２５は、熱伝導に大きな支障が無い限り、樹脂を主材とするか否かを問わない。樹脂としては、例えば、熱可塑性樹脂を好適に使用できる。熱可塑性樹脂としては、熱源からの熱を伝導する際に溶融しない程度の高融点を備える樹脂が好ましく、例えば、ポリフェニレンスルフィド（ＰＰＳ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、ポリアミドイミド（ＰＡＩ）、芳香族ポリアミド（アラミド繊維）等を好適に挙げることができる。樹脂は、固形状のプレート２５の成形前の状態において、炭素フィラーの隙間に、例えば粒子状あるいは繊維状に分散している。 When the solid plate 25 is a sheet containing carbon and a resin, the resin may exceed 50% by mass or 50% by mass or less with respect to the total mass of the solid plate 25. Is also good. That is, it does not matter whether or not the solid plate 25 is mainly made of resin as long as there is no great problem in heat conduction. As the resin, for example, a thermoplastic resin can be preferably used. As the thermoplastic resin, a resin having a high melting point that does not melt when conducting heat from a heat source is preferable, and for example, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyamideimide (PAI), and fragrance. Group polyamide (aramid fiber) and the like can be preferably mentioned. The resin is dispersed in the gaps between the carbon fillers, for example, in the form of particles or fibers in the state before molding of the solid plate 25.
　固形状のプレート２５は、導電性に優れるか否かを問わない。固形状のプレート２５の熱伝導率は、好ましくは１０Ｗ／ｍＫ以上である。この実施形態では、固形状のプレート２５は、好ましくは、グラファイト製のフィルムであり、熱伝導性と導電性に優れる材料から成る。固形状のプレート２５は、湾曲性（若しくは屈曲性）に優れるシートであるのが好ましく、その厚さに制約はないが、０．０２～３ｍｍが好ましく、０．０３～０．５ｍｍがより好ましい。ただし、固形状のプレート２５の熱伝送量は、当該プレート２５の厚さが大きい方が多くなる。シートの強度、可撓性および熱伝導性を総合的に考慮して、上記厚さを決定するのが好ましい。 The solid plate 25 may or may not have excellent conductivity. The thermal conductivity of the solid plate 25 is preferably 10 W / mK or more. In this embodiment, the solid plate 25 is preferably a film made of graphite and is made of a material having excellent thermal conductivity and conductivity. The solid plate 25 is preferably a sheet having excellent bendability (or flexibility), and the thickness thereof is not limited, but 0.02 to 3 mm is preferable, and 0.03 to 0.5 mm is more preferable. .. However, the amount of heat transmitted by the solid plate 25 increases as the thickness of the plate 25 increases. It is preferable to determine the thickness by comprehensively considering the strength, flexibility and thermal conductivity of the sheet.
　低硬度で変形容易な熱伝導部材２０と、熱伝導部材２０と比較して高硬度の固形状のプレート２５とを、それぞれスパイラル状の放熱部材２の外側および内側に位置するように袋体１５の内部に備えると、熱源に対する高密着性と、放熱部材２の長さ方向の高熱伝導性とを両立できる。 The heat conductive member 20 having a low hardness and being easily deformed and the solid plate 25 having a higher hardness than the heat conductive member 20 are placed in a bag body 15 so as to be located on the outside and the inside of the spiral heat radiation member 2, respectively. If it is provided inside the above, it is possible to achieve both high adhesion to a heat source and high thermal conductivity in the length direction of the heat radiating member 2.
　一部Ｂの拡大図は、固形状のプレート２５と内側シート１２との境界部分の断面を示す。固形状のプレート２５は、内側シート１２との対向面に、凹凸状の易密着面２６を有する。易密着面２６は、凹凸面である。易密着面２６は、被覆層１０と熱伝導部材（固形状のプレート２５）との間にあって、両者１０，２５の密着性を高めるための高密着手段の一例である。なお、易密着面２６は、内側シート１２側に形成されていても良い。 The enlarged view of a part B shows a cross section of a boundary portion between the solid plate 25 and the inner sheet 12. The solid plate 25 has an uneven easy-adhesion surface 26 on the surface facing the inner sheet 12. The easy contact surface 26 is an uneven surface. The easy-adhesion surface 26 is an example of a high-adhesion means for enhancing the adhesion between the coating layer 10 and the heat conductive member (solid plate 25). The easy contact surface 26 may be formed on the inner sheet 12 side.
　図３Ｂは、内側シート１２の厚さと外側シート１３の厚さとをほぼ同一とした放熱部材２を示す。外側シート１３は、熱源との接触領域であるため、限りなく薄い方が好ましい。これに対して、内側シート１２は、外側シート１３に比べると、薄いことを重要なファクタとしていない。しかし、内側シート１２を、外側シート１３と同等の厚さにしても良い。この例では、フランジ１１は、内側シート１２と面一ではない。 FIG. 3B shows a heat radiating member 2 in which the thickness of the inner sheet 12 and the thickness of the outer sheet 13 are substantially the same. Since the outer sheet 13 is a contact area with a heat source, it is preferable that the outer sheet 13 is as thin as possible. On the other hand, the inner sheet 12 is thinner than the outer sheet 13 as an important factor. However, the inner sheet 12 may have the same thickness as the outer sheet 13. In this example, the flange 11 is not flush with the inner sheet 12.
　図３Ｃは、フランジレスの放熱部材２を示す。被覆層１０は、その内部に、液体若しくは半固形体の熱伝導部材２０を含む。放熱部材２の断面形状は、略長方形である。このように、放熱部材２は、フランジレスであっても良い。図３Ａの放熱部材２と同様、Ｔ１＜Ｔ２であるのが好ましい。 FIG. 3C shows a flangeless heat dissipation member 2. The coating layer 10 contains a liquid or semi-solid heat conductive member 20 inside. The cross-sectional shape of the heat radiating member 2 is substantially rectangular. As described above, the heat radiating member 2 may be flangeless. Similar to the heat radiating member 2 of FIG. 3A, it is preferable that T1 <T2.
　図３Ｄは、フランジレスであって、かつ熱伝導部材を固形状のプレート２５とする放熱部材２を示す。放熱部材２の断面形状は、略長方形である。放熱部材２において、液体若しくは半固形体の熱伝導部材２０は、必須の構成要素ではなく、固形状のプレート２５を備えた部材でも良い。図３Ａの放熱部材２と同様、Ｔ１＜Ｔ２であるのが好ましい。 FIG. 3D shows a heat dissipation member 2 that is flangeless and has a heat conductive member as a solid plate 25. The cross-sectional shape of the heat radiating member 2 is substantially rectangular. In the heat radiating member 2, the liquid or semi-solid heat conductive member 20 is not an essential component, but may be a member provided with a solid plate 25. Similar to the heat radiating member 2 of FIG. 3A, it is preferable that T1 <T2.
　一部Ｃの拡大図は、固形状のプレート２５と外側シート１３との境界部分の断面を示す。放熱部材２は、固形状のプレート２５と外側シート１３との間に接着層２７を有する。接着層２７は、被覆層１０と熱伝導部材（固形状のプレート２５）との間にあって、両者１０，２５の密着性を高めるための高密着手段の一例である。なお、接着層２７は、内側シート１２などの被覆層１０の内側の如何なる面と、固形状のプレート２５との間に形成されても良い。 The enlarged view of a part C shows a cross section of a boundary portion between the solid plate 25 and the outer sheet 13. The heat radiating member 2 has an adhesive layer 27 between the solid plate 25 and the outer sheet 13. The adhesive layer 27 is between the coating layer 10 and the heat conductive member (solid plate 25), and is an example of high adhesion means for improving the adhesion between the two 10 and 25. The adhesive layer 27 may be formed between any surface inside the coating layer 10 such as the inner sheet 12 and the solid plate 25.
　図３Ｅは、フランジレスであって、かつ図３Ａと同様に液体若しくは半固形体の熱伝導部材と固形の熱伝導部材とを含む放熱部材２を示す。放熱部材２の断面形状は、略長方形である。固形状のプレート２５と、液体若しくは半固形体の熱伝導部材２０とを両方含む点で、図３Ｅの放熱部材２と図３Ａの放熱部材２とは共通する。易接着面２６あるいは接着層２７に代表される高密着手段を、固形状のプレート２５と内側シート１２との間に形成しても良い。また、高密着手段は、熱伝導部材２０側に形成しても良い。図３Ａの放熱部材２と同様、Ｔ１＜Ｔ２であるのが好ましい。 FIG. 3E shows a heat dissipation member 2 that is flangeless and includes a liquid or semi-solid heat conductive member and a solid heat conductive member as in FIG. 3A. The cross-sectional shape of the heat radiating member 2 is substantially rectangular. The heat radiating member 2 of FIG. 3E and the heat radiating member 2 of FIG. 3A are common in that they include both the solid plate 25 and the heat conductive member 20 of a liquid or a semi-solid body. A high-adhesion means represented by the easy-adhesion surface 26 or the adhesive layer 27 may be formed between the solid plate 25 and the inner sheet 12. Further, the high adhesion means may be formed on the heat conductive member 20 side. Similar to the heat radiating member 2 of FIG. 3A, it is preferable that T1 <T2.
２．放熱構造体
　本発明の実施形態に係る放熱構造体について説明する。 2. 2. Heat dissipation structure The heat dissipation structure according to the embodiment of the present invention will be described.
　図４は、一実施形態に係る放熱構造体の平面図を示す。図５は、図４の放熱構造体の変形例の平面図を示す。 FIG. 4 shows a plan view of the heat dissipation structure according to the embodiment. FIG. 5 shows a plan view of a modified example of the heat dissipation structure of FIG.
　以下に説明する放熱構造体３，４は、上述の実施形態および各種変形例に係る放熱部材２を２以上備える。放熱構造体３は、２以上の放熱部材２の非連結状態の集合体である。例えば、熱源と冷却部材との間に放熱構造体３を介在させる場合には、２以上の放熱部材２を分離状態で配置するのが好ましい。 The heat dissipation structures 3 and 4 described below include two or more heat dissipation members 2 according to the above-described embodiment and various modifications. The heat radiating structure 3 is an aggregate of two or more heat radiating members 2 in a non-connected state. For example, when the heat radiating structure 3 is interposed between the heat source and the cooling member, it is preferable to arrange two or more heat radiating members 2 in a separated state.
　放熱構造体４は、２以上の放熱部材２をその長さ方向に直角となる方向に並べて、放熱部材２同士をテープ状の固定部材５を用いて固定したものである。固定部材５は、好ましくは、放熱部材２の長さ方向の両端側を固定している。ただし、当該両端側に加え、放熱部材２の長さ方向略中央部分を、固定しても良い。また、当該両端側のいずれか一端側を固定しても良い。また、上記略中央部分のみを固定しても良い。また、固定部材５は、放熱構造体４の一面側のみを固定しているが、表裏の両面側を固定しても良い。さらには、固定部材５は、テープ状の部材に限定されず、糸でも良い。例えば、放熱部材２同士を糸で縛って固定し、あるいは糸で縫って固定しても良い。例えば、熱源と冷却部材との間に放熱構造体４を介在させる場合には、２以上の放熱部材２を連結した状態で配置するのが好ましい。 The heat radiating structure 4 is a structure in which two or more heat radiating members 2 are arranged in a direction perpendicular to the length direction thereof, and the heat radiating members 2 are fixed to each other by using a tape-shaped fixing member 5. The fixing member 5 preferably fixes both ends of the heat radiating member 2 in the length direction. However, in addition to the both ends, the substantially central portion of the heat radiating member 2 in the length direction may be fixed. Further, either one end side may be fixed. Further, only the substantially central portion may be fixed. Further, although the fixing member 5 fixes only one side of the heat dissipation structure 4, it may be fixed on both sides of the front and back sides. Further, the fixing member 5 is not limited to the tape-shaped member, and may be a thread. For example, the heat radiating members 2 may be tied together with a thread and fixed, or may be sewn and fixed with a thread. For example, when the heat radiating structure 4 is interposed between the heat source and the cooling member, it is preferable to arrange two or more heat radiating members 2 in a connected state.
３．バッテリー
　本発明の実施形態に係るバッテリーについて説明する。 3. 3. Battery A battery according to an embodiment of the present invention will be described.
　図６は、図１Ｂの放熱部材を２以上備えるバッテリーの縦断面図を示す。ここで、「縦断面図」は、バッテリーの筐体内部の上方開口面から底部へと垂直に切断する図を意味する。 FIG. 6 shows a vertical cross-sectional view of a battery including two or more heat dissipation members of FIG. 1B. Here, the "vertical cross-sectional view" means a view that vertically cuts from the upper opening surface inside the housing of the battery to the bottom.
　この実施形態において、バッテリー３０は、例えば、電気自動車用のバッテリーであって、多数のバッテリーセル４０を備える。バッテリー３０は、一方に開口する有底型の筐体３１を備える。筐体３１は、好ましくは、アルミニウム若しくはアルミニウム基合金から成る。バッテリーセル４０は、筐体３１の内部３４に配置される。バッテリーセル４０の上方には、電極が突出して設けられている。複数のバッテリーセル４０は、好ましくは、筐体３１内において、その両側からネジ等を利用して圧縮する方向に力を与えられて、互いに密着するようになっている（不図示）。バッテリーセル４０は、筐体３１の底部３２との間に、放熱構造体３を挟むようにして筐体３１内に配置される。なお、放熱構造体３に代えて、放熱構造体４を配置しても良い。底部３２には、冷却媒体（冷却部材または冷却剤ともいう）３５の一例である冷却水を流すための流路３３が備えられている。 In this embodiment, the battery 30 is, for example, a battery for an electric vehicle and includes a large number of battery cells 40. The battery 30 includes a bottomed housing 31 that opens to one side. The housing 31 is preferably made of aluminum or an aluminum-based alloy. The battery cell 40 is arranged inside 34 of the housing 31. An electrode is provided above the battery cell 40 so as to project. The plurality of battery cells 40 are preferably brought into close contact with each other in the housing 31 by applying a force in the direction of compression from both sides thereof using screws or the like (not shown). The battery cell 40 is arranged in the housing 31 so as to sandwich the heat radiating structure 3 with the bottom portion 32 of the housing 31. The heat radiating structure 4 may be arranged instead of the heat radiating structure 3. The bottom portion 32 is provided with a flow path 33 for flowing cooling water, which is an example of a cooling medium (also referred to as a cooling member or a cooling agent) 35.
　上述のように、バッテリー３０は、筐体３１内に、１または２以上の熱源としてのバッテリーセル４０を備え、バッテリーセル４０と筐体３１（例えば、底部３２）との間に放熱部材２を備える。放熱構造体３に備えられる複数の放熱部材２は、バッテリーセル４０と冷却媒体３５との間に介在するとも言える。このような構造のバッテリー３０において、バッテリーセル４０は、放熱部材２を通じて、底部３２、流路３３を流れる冷却媒体３５へと伝熱して、水冷によって効果的に除熱される。 As described above, the battery 30 includes a battery cell 40 as one or more heat sources in the housing 31, and a heat dissipation member 2 is provided between the battery cell 40 and the housing 31 (for example, the bottom 32). Be prepared. It can be said that the plurality of heat radiating members 2 provided in the heat radiating structure 3 are interposed between the battery cell 40 and the cooling medium 35. In the battery 30 having such a structure, the battery cell 40 transfers heat to the cooling medium 35 flowing through the bottom portion 32 and the flow path 33 through the heat radiating member 2, and is effectively removed by water cooling.
　図７は、図４の放熱構造体の上に、バッテリーセルの側面を接触させるように横置きにしたときの断面図、その一部拡大図および充放電時にバッテリーセルが膨張した際の一部断面図をそれぞれ示す。 FIG. 7 is a cross-sectional view when the battery cell is horizontally placed on the heat radiation structure of FIG. 4 so as to be in contact with the side surface of the battery cell, a partially enlarged view thereof, and a part when the battery cell expands during charging and discharging. Sectional views are shown respectively.
　上述の実施形態では、バッテリーセル４０を縦にしてその下端に放熱構造体３を接触せしめている状況について説明したが、バッテリーセル４０の配置形態は、これに限定されない。図７に示すように、バッテリーセル４０の側面を放熱構造体３の各放熱部材２に接触させるように、バッテリーセル４０を配置しても良い。バッテリーセル４０は、充電および放電の際に温度上昇する。バッテリーセル４０の容器自体が柔軟性に富む材料にて形成されていると、バッテリーセル４０の特に側面が膨らむ可能性がある。そのような場合でも、図７に示すように、放熱構造体３の各放熱部材２がバッテリーセル４０の外面の形状に合わせて変形できるので、充放電時にも放熱性を高く維持できる。なお、放熱構造体３に代えて、放熱構造体４上にバッテリーセル４０の側面を接触させても良い。 In the above-described embodiment, the situation in which the battery cell 40 is vertically arranged and the heat radiating structure 3 is brought into contact with the lower end thereof has been described, but the arrangement form of the battery cell 40 is not limited to this. As shown in FIG. 7, the battery cell 40 may be arranged so that the side surface of the battery cell 40 is in contact with each heat radiating member 2 of the heat radiating structure 3. The temperature of the battery cell 40 rises during charging and discharging. If the container of the battery cell 40 itself is made of a flexible material, the side surface of the battery cell 40 may bulge in particular. Even in such a case, as shown in FIG. 7, since each heat dissipation member 2 of the heat dissipation structure 3 can be deformed according to the shape of the outer surface of the battery cell 40, high heat dissipation can be maintained even during charging and discharging. Instead of the heat radiating structure 3, the side surface of the battery cell 40 may be brought into contact with the heat radiating structure 4.
４．その他の実施形態
　上述のように、本発明の好適な各実施形態について説明したが、本発明は、これらに限定されることなく、種々変形して実施可能である。 4. Other Embodiments As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited thereto, and can be variously modified and implemented.
　図８Ａは、変形例１に係る放熱部材の製造過程と当該放熱部材の正面図を示す。図８Ｂは、変形例２に係る放熱部材の正面図を示す。 FIG. 8A shows the manufacturing process of the heat radiating member according to the modified example 1 and the front view of the heat radiating member. FIG. 8B shows a front view of the heat radiating member according to the second modification.
　変形例１に係る放熱部材２は、図３Ｃのシート１と同様の構造を有するシート１を幅方向に弧状に丸めた形態を有する。シート１の幅方向両側を矢印Ｆの方向に曲げることにより、シート１は、弧状に丸めた形態を有する放熱部材２となる。放熱部材２は、フランジレスである。被覆層１０は、その内部に、液体若しくは半固形体の熱伝導部材２０を含む。図８Ａ、図８Ｂおよび図８Ｃでは、熱伝導部材２０は、被覆層１０の内部に封入されているため、点線で描かれている。放熱部材２の断面形状は、略長方形である。被覆層１０は、好ましくは、弧状に丸めた外側の面の厚みを、弧状に丸めた内側の面の厚みより薄く構成されている。放熱部材２の形状は、完全に閉じた円筒ではなく、一部にスリット５０を有する筒状体である。バッテリー３０において、スリット５０を底部３２に向け、スリット５０と反対側をバッテリーセル４０側に向けるように放熱部材２を配置すると、放熱部材２は、バッテリーセル４０から矢印Ｇ方向の荷重を受け、扁平状に変形する。バッテリーセル４０からの熱は、熱流路Ｌ１，Ｌ２に沿って、底部４２へと伝わる。 The heat radiating member 2 according to the modified example 1 has a form in which the sheet 1 having the same structure as the sheet 1 in FIG. 3C is rolled in an arc shape in the width direction. By bending both sides of the sheet 1 in the width direction in the direction of the arrow F, the sheet 1 becomes a heat radiating member 2 having an arc-shaped rounded shape. The heat radiating member 2 is flangeless. The coating layer 10 contains a liquid or semi-solid heat conductive member 20 inside. In FIGS. 8A, 8B and 8C, the heat conductive member 20 is drawn by a dotted line because it is enclosed inside the covering layer 10. The cross-sectional shape of the heat radiating member 2 is substantially rectangular. The covering layer 10 is preferably configured such that the thickness of the outer surface rounded in an arc shape is thinner than the thickness of the inner surface rounded in an arc shape. The shape of the heat radiating member 2 is not a completely closed cylinder, but a tubular body having a slit 50 in a part thereof. When the heat radiating member 2 is arranged so that the slit 50 faces the bottom 32 and the side opposite to the slit 50 faces the battery cell 40 in the battery 30, the heat radiating member 2 receives a load in the direction of arrow G from the battery cell 40. It deforms into a flat shape. The heat from the battery cell 40 is transferred to the bottom 42 along the heat channels L1 and L2.
　変形例２に係る放熱部材２は、図８Ｂに示すように、アルファベットのＣを裏返した形状を有する。変形例２に係る放熱部材２は、変形例１と同様のシート１を弧状に丸めた形態を有し、スリット５１を上述のスリット５０より広げた形態を有する。変形例２に係る放熱構造体２は、矢印Ｇの方向からバッテリーセル４０の荷重をかけると、バッテリーセル４０と底部３２との間で、扁平状に変形する。バッテリーセル４０からの熱は、熱流路Ｌ１に沿って底部３２に伝わる。 As shown in FIG. 8B, the heat radiating member 2 according to the modification 2 has a shape in which the alphabet C is turned inside out. The heat radiating member 2 according to the modified example 2 has the same form as the modified example 1 in which the sheet 1 is rolled in an arc shape, and the slit 51 is wider than the slit 50 described above. When the load of the battery cell 40 is applied from the direction of the arrow G, the heat radiating structure 2 according to the modification 2 is deformed in a flat shape between the battery cell 40 and the bottom portion 32. The heat from the battery cell 40 is transferred to the bottom 32 along the heat flow path L1.
　なお、変形例１，２に係るシート１は、図１Ａ、図２Ａ、図２Ｂおよび図２Ｃに示す構造を有する何れのシート１に代えても良い。例えば、被覆層１０は、シート１０の幅方向の少なくとも一方に備えるフランジ１１と、フランジ１１によって閉じられた袋体１５と、を備え、熱伝導部材２０は、袋体１５の内部に存在させても良い。熱伝導部材２０は、液体若しくは流動可能な半固形体であっても良い。液体若しくは半固形体は、炭素フィラーを含んでも良い。熱伝導部材２０は、弧状に丸めた外側に配置される液体若しくは半固形体と、弧状に丸めた内側に配置される固形状のプレートと、を含んでも良い。被覆層１０と熱伝導部材２０との間に、被覆層１０と熱伝導部材２０との密着性を高めるための高密着手段を備えても良い。放熱構造体３，４およびバッテリー３０に、変形例１，２に係る放熱部材２を備えても良い。 Note that the sheet 1 according to the modified examples 1 and 2 may be replaced with any sheet 1 having the structures shown in FIGS. 1A, 2A, 2B and 2C. For example, the covering layer 10 includes a flange 11 provided on at least one of the width directions of the sheet 10 and a bag body 15 closed by the flange 11, and the heat conductive member 20 is present inside the bag body 15. Is also good. The heat conductive member 20 may be a liquid or a fluid semi-solid body. The liquid or semi-solid body may contain a carbon filler. The heat conductive member 20 may include a liquid or a semi-solid body arranged on the outside rolled in an arc shape and a solid plate arranged on the inside arranged in an arc shape. A high adhesion means for enhancing the adhesion between the coating layer 10 and the heat conductive member 20 may be provided between the coating layer 10 and the heat conductive member 20. The heat radiating structures 3 and 4 and the battery 30 may be provided with the heat radiating member 2 according to the modified examples 1 and 2.
　また、フランジ１１は、シート１の幅方向の両側に備えられるのではなく、当該幅方向の一方にのみ、あるいは幅方向と長さ方向の合計４カ所に備えられても良い。袋体１５は、液体若しくは半固形体の熱伝導部材２０を入れた場合には密閉状態であるのが好ましい。しかし、上記熱伝導部材２０を含まずに固形状のプレート２５を袋体１５の内部に備える場合には、袋体１５は、外部に通じる穴を有していても良い。 Further, the flanges 11 are not provided on both sides of the sheet 1 in the width direction, but may be provided only on one side in the width direction, or may be provided at a total of four locations in the width direction and the length direction. The bag body 15 is preferably in a sealed state when a liquid or semi-solid heat conductive member 20 is contained therein. However, when the solid plate 25 is provided inside the bag body 15 without including the heat conductive member 20, the bag body 15 may have a hole leading to the outside.
　熱源は、バッテリーセル４０のみならず、回路基板や電子機器本体などの熱を発する対象物を全て含む。例えば、熱源は、キャパシタおよびＩＣチップ等の電子部品であっても良い。同様に、冷却媒体３５は、冷却用の水のみならず、有機溶剤、液体窒素、冷却用の気体であっても良い。バッテリー３０内に備えられる放熱部材２は、１つのみでも良い。また、放熱構造体３，４は、バッテリー３０以外の構造物、例えば、電子機器、家電、発電装置等に配置されていても良い。 The heat source includes not only the battery cell 40 but also all objects that generate heat such as a circuit board and an electronic device body. For example, the heat source may be an electronic component such as a capacitor and an IC chip. Similarly, the cooling medium 35 may be not only cooling water but also an organic solvent, liquid nitrogen, or a cooling gas. Only one heat radiating member 2 may be provided in the battery 30. Further, the heat dissipation structures 3 and 4 may be arranged in a structure other than the battery 30, for example, an electronic device, a home appliance, a power generation device, or the like.
　具体的には、電子機器は、電子部品を備える回路基板と、回路基板の電子部品と反対側の面（裏面）に配置されるヒートシンクとを備え、回路基板とヒートシンクとの間に、上述の放熱部材２または放熱構造体３，４を介在させても良い。また、電子機器は、電子部品を備える回路基板と、回路基板の電子部品側の面（表面）に配置されるヒートシンクとを備え、電子部品とヒートシンクとの間に、上述の放熱部材２または放熱構造体３，４を介在させても良い。シート１は、必ずしも長尺状であることを要しない。 Specifically, the electronic device includes a circuit board including electronic components and a heat sink arranged on a surface (rear surface) opposite to the electronic components of the circuit board, and is described above between the circuit board and the heat sink. The heat radiating member 2 or the heat radiating structures 3 and 4 may be interposed. Further, the electronic device includes a circuit board including electronic components and a heat sink arranged on a surface (surface) of the circuit board on the electronic component side, and the heat radiation member 2 or heat dissipation described above is provided between the electronic components and the heat sink. Structures 3 and 4 may be interposed. The sheet 1 does not necessarily have to be long.
　また、上述の各実施形態および変形例の複数の構成要素は、互いに組み合わせ不可能な場合を除いて、自由に組み合わせ可能である。例えば、図３Ａ、図３Ｂ、図３Ｃ、図３Ｄおよび図３Ｅに示す各種変形例に係る放熱部材２は、放熱構造体３，４またはバッテリー３０に備えることができる。 Further, the plurality of components of each of the above-described embodiments and modifications can be freely combined except when they cannot be combined with each other. For example, the heat radiating member 2 according to various modifications shown in FIGS. 3A, 3B, 3C, 3D and 3E can be provided in the heat radiating structures 3 and 4 or the battery 30.
　本発明は、熱源から冷却部位への熱伝導、あるいは熱源同士間の熱伝導を高める必要のある分野にて利用可能である。

  The present invention can be used in fields where it is necessary to enhance heat conduction from a heat source to a cooling portion or heat conduction between heat sources.

Claims (10)

  1. 　熱源からの放熱を高める放熱部材であって、
    　シートを弧状に丸めた形態を有しており、
    　前記シートは、
    　熱伝導部材と、
    　前記熱伝導部材の外側を被覆する被覆層と、
    を備えることを特徴とする放熱部材。     It is a heat dissipation member that enhances heat dissipation from a heat source.
    It has a form in which the sheet is rolled into an arc, and it has a shape.
    The sheet is
    With heat conductive members
    A coating layer that covers the outside of the heat conductive member and
    A heat dissipation member characterized by being provided with.
  2. 　長尺状の前記シートをスパイラル状に巻回させながら進行する形態を有していることを特徴とする請求項１に記載の放熱部材。 The heat radiating member according to claim 1, wherein the long sheet has a form of traveling while being wound in a spiral shape.
  3. 　前記被覆層は、弧状に丸めた外側の面の厚みを、弧状に丸めた内側の面の厚みより薄く構成されていることを特徴とする請求項１または２に記載の放熱部材。 The heat radiating member according to claim 1 or 2, wherein the covering layer is configured such that the thickness of the outer surface rounded in an arc shape is thinner than the thickness of the inner surface rounded in an arc shape.
  4. 　前記被覆層は、前記シートの幅方向の少なくとも一方に備えるフランジと、前記フランジによって閉じられた袋体と、を備え、
    　前記熱伝導部材は、前記袋体の内部に存在することを特徴とする請求項１から３のいずれか１項に記載の放熱部材。     The coating layer comprises a flange provided on at least one of the sheets in the width direction and a bag closed by the flange.
    The heat radiating member according to any one of claims 1 to 3, wherein the heat conductive member exists inside the bag body.
  5. 　前記熱伝導部材は、液体若しくは流動可能な半固形体であることを特徴とする請求項１から４のいずれか１項に記載の放熱部材。 The heat radiating member according to any one of claims 1 to 4, wherein the heat conductive member is a liquid or a flowable semi-solid body.
  6. 　前記液体若しくは前記半固形体は、炭素フィラーを含むことを特徴とする請求項５に記載の放熱部材。 The heat radiating member according to claim 5, wherein the liquid or the semi-solid body contains a carbon filler.
  7. 　前記熱伝導部材は、弧状に丸めた外側に配置される前記液体若しくは前記半固形体と、弧状に丸めた内側に配置される固形状のプレートと、を含むことを特徴とする請求項５または６に記載の放熱部材。 5. The heat dissipation member according to 6.
  8. 　前記被覆層と前記熱伝導部材との間に、前記被覆層と前記熱伝導部材との密着性を高めるための高密着手段を備えることを特徴とする請求項１から７のいずれか１項に記載の放熱部材。 The invention according to any one of claims 1 to 7, wherein a high adhesion means for enhancing the adhesion between the coating layer and the heat conductive member is provided between the coating layer and the heat conductive member. The heat dissipation member described.
  9. 　請求項１から８のいずれか１項記載の放熱部材を２以上備えることを特徴とする放熱構造体。 A heat radiating structure comprising two or more heat radiating members according to any one of claims 1 to 8.
  10. 　筐体内に、１または２以上の熱源としてのバッテリーセルを備えたバッテリーであって、
    　前記バッテリーセルと前記筐体との間に、請求項１から８のいずれか１項に記載の放熱部材を備えることを特徴とするバッテリー。     A battery with one or more battery cells as a heat source in the housing.
    A battery according to any one of claims 1 to 8, wherein a heat radiating member according to any one of claims 1 to 8 is provided between the battery cell and the housing.
PCT/JP2021/025426 2020-08-12 2021-07-06 Heat dissipation member, heat dissipation structure, and battery WO2022034759A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012048905A (en) * 2010-08-25 2012-03-08 Hitachi Ltd Battery including coolant, and battery pack including coolant
JP2015090750A (en) * 2013-11-05 2015-05-11 信越ポリマー株式会社 Heat conduction device and battery module
JP2019125665A (en) * 2018-01-16 2019-07-25 信越ポリマー株式会社 Heat dissipation structure and battery provided with the same
WO2020105377A1 (en) * 2018-11-21 2020-05-28 信越ポリマー株式会社 Heat dissipation structure and battery having same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012048905A (en) * 2010-08-25 2012-03-08 Hitachi Ltd Battery including coolant, and battery pack including coolant
JP2015090750A (en) * 2013-11-05 2015-05-11 信越ポリマー株式会社 Heat conduction device and battery module
JP2019125665A (en) * 2018-01-16 2019-07-25 信越ポリマー株式会社 Heat dissipation structure and battery provided with the same
WO2020105377A1 (en) * 2018-11-21 2020-05-28 信越ポリマー株式会社 Heat dissipation structure and battery having same

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