WO2020184109A1 - Heat-dissipating structure sheet and method for manufacturing heat-dissipating structure - Google Patents

Heat-dissipating structure sheet and method for manufacturing heat-dissipating structure Download PDF

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Publication number
WO2020184109A1
WO2020184109A1 PCT/JP2020/006549 JP2020006549W WO2020184109A1 WO 2020184109 A1 WO2020184109 A1 WO 2020184109A1 JP 2020006549 W JP2020006549 W JP 2020006549W WO 2020184109 A1 WO2020184109 A1 WO 2020184109A1
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WO
WIPO (PCT)
Prior art keywords
heat
heat radiating
sheet
fixing member
radiating structure
Prior art date
Application number
PCT/JP2020/006549
Other languages
French (fr)
Japanese (ja)
Inventor
清水　隆男
Original Assignee
信越ポリマー株式会社
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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
Priority to JP2021504869A priority Critical patent/JP7376568B2/en
Publication of WO2020184109A1 publication Critical patent/WO2020184109A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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 structure sheet and a method for manufacturing a heat radiating structure.
  • Control systems for automobiles, aircraft, ships, and 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 is made of a material having excellent heat dissipation, a heat sink is attached, or a cooling fan is driven by a single means or a combination of multiple means. It is done.
  • a method in which the circuit board itself is made of a material having excellent heat dissipation, for example, 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 problems such as failure of the rotating device called the fan, maintenance necessity for preventing the failure, and difficulty in securing the 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 widely used as a heat radiating 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 the rubber sheet is also conceivable, but since the lower surfaces of the plurality of battery cells are not flat and have steps, a gap is generated 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.
  • a heat dissipation structure in which a plurality of heat dissipation members in which a sheet having high thermal conductivity such as graphite is wound around the outer surface of a tubular cushion member made of rubber or the like can be considered.
  • a heat radiating structure it is necessary to arrange the plurality of heat radiating members between the battery cell and the bottom surface of the housing, and it is desired to improve the productivity of the heat radiating structure. .. This applies not only to battery cells, but also to heat dissipation structures for other heat sources such as circuit boards, electronic components or electronic device bodies.
  • the present invention has been made in view of the above problems, is adaptable to various forms of a heat source, is lightweight, has abundant elastic deformability, is excellent in heat dissipation efficiency, and enhances the productivity of a heat dissipation structure. It is an object of the present invention to provide a heat radiating structure sheet and a method for manufacturing a heat radiating structure.
  • the heat radiating structure sheet includes a plurality of heat radiating members for enhancing heat radiating from a heat source, and a fixing member for fixing the heat radiating member.
  • a heat conductive sheet having a shape that advances while winding in a spiral shape for transferring heat from the heat source, and an annular back surface of the heat conductive sheet that penetrates in the direction of traveling while winding the heat conductive sheet.
  • a tubular cushion member having a through path and being more easily deformed according to the surface shape of the heat source than the heat conductive sheet is provided, and the fixing member has the plurality of heat radiating members in the length direction thereof.
  • the fixing member preferably has recesses for accommodating at least one end of both ends of the plurality of heat radiating members in the length direction. To do. (3) In the heat radiating structure sheet according to another embodiment, preferably, the fixing member has a thickness such that the intermediate portion can be flush with the outer surface of the fixing member or protrude from the outer surface by pressing from the heat source. Has. (4) In the heat radiating structure sheet according to another embodiment, the heat radiating member is preferably adhered to the fixing member with an adhesive.
  • the surface of the heat conductive sheet has a heat conductive oil for increasing the heat conductivity from the heat source in contact with the surface to the surface. .. (6)
  • the heat conductive oil has a higher thermal conductivity than the silicone oil and the silicone oil, and is composed of one or more of metal, ceramics, or carbon. Includes with conductive filler.
  • the method for manufacturing a heat radiating structure according to one embodiment is a method for manufacturing a heat radiating structure shorter than the sheet from any one of the above radiating structure sheets, and is in the length direction of a plurality of heat radiating members.
  • a heat radiating structure sheet and a heat radiating structure sheet that can adapt to various forms of a heat source, are lightweight, have abundant elastic deformability, have excellent heat radiating efficiency, and can increase the productivity of the heat radiating structure.
  • a method for manufacturing a heat radiating structure can be provided.
  • FIG. 1A shows a plan view of the heat radiating structure sheet according to the first embodiment.
  • FIG. 1B shows a cross-sectional view taken along the line AA in FIG. 1A.
  • FIG. 1C shows an enlarged view of region B in FIG. 1B.
  • FIG. 2A shows a sectional view taken along line CC of the heat radiating structure sheet shown in FIG. 1A.
  • FIG. 2B shows an enlarged view of the region E in FIG. 2A.
  • FIG. 2C shows a side view of the heat radiating structure sheet shown in FIG. 1A as viewed from the direction of arrow D.
  • FIG. 3A shows a plan view of the heat radiating structure according to the first embodiment.
  • FIG. 3B shows a sectional view taken along line FF in FIG. 3A.
  • FIG. 3C shows an enlarged view of the region G in FIG. 3B.
  • FIG. 4A shows a vertical sectional view of the heat radiating structure according to the first embodiment and a battery including the heat radiating structure.
  • FIG. 4B shows a cross-sectional view of a morphological change of the heat radiating structure before and after compressing the heat radiating structure by the battery cell in FIG. 4A.
  • FIG. 5A shows a diagram for explaining a method of manufacturing the heat radiating member of FIG. 1A.
  • FIG. 5B shows a diagram for explaining a method of manufacturing the heat radiating member of FIG. 1A.
  • FIG. 5C shows a diagram for explaining a method of manufacturing the heat radiating member of FIG. 1A.
  • FIG. 6 shows a flowchart including the main steps of the method for manufacturing the heat radiating structure according to the first embodiment.
  • FIG. 7A shows in a plan view the main steps of the method for manufacturing the heat radiating structure according to the first embodiment.
  • FIG. 7B shows in a plan view the main steps of the method for manufacturing the heat radiating structure according to the first embodiment.
  • FIG. 7C shows in a plan view the main steps of the method for manufacturing the heat radiating structure according to the first embodiment.
  • FIG. 8 shows a plan view of the heat radiating structure sheet according to the second embodiment.
  • FIG. 9A shows a plan view of the heat radiating structure according to the second embodiment.
  • FIG. 9B shows a sectional view taken along line OH in FIG. 9A.
  • FIG. 9C shows an enlarged view of region I in FIG.
  • FIG. 10 shows a cross-sectional view when the battery cell is laid horizontally so as to be in contact with the side surface of the battery cell on the heat radiating structure, a partially enlarged view thereof, and a partial cross-sectional view when the battery cell expands during charging and discharging. Each is shown.
  • FIG. 1A is a plan view of the heat radiating structure sheet according to the first embodiment
  • FIG. 1B is a sectional view taken along line AA in FIG. 1A
  • FIG. 1C is an enlarged view of a region B in FIG. 1B
  • 2A is a sectional view taken along line CC of the heat radiating structure sheet shown in FIG. 1A
  • FIG. 2B is an enlarged view of a region E in FIG. 2A
  • FIG. 2C shows the heat radiating structure sheet shown in FIG. 1A as an arrow D.
  • the side views seen from the direction are shown respectively.
  • 3A is a plan view of the heat radiating structure according to the first embodiment
  • FIG. 3B is a sectional view taken along line FF in FIG.
  • FIG. 3A is a vertical sectional view of the heat radiating structure according to the first embodiment and a battery provided with the heat radiating structure
  • FIG. 4B shows the heat radiating structure before and after the heat radiating structure is compressed by the battery cell in FIG. 4A.
  • a cross-sectional view of the morphological change is shown.
  • the battery 1 has a structure in which a plurality of battery cells 20 are provided in a housing 11 in which the cooling member 15 is brought into contact with the battery 1.
  • the heat radiating structure 25 preferably includes an end portion (lower end portion) of the battery cell 20 on the side close to the cooling member 15 and a part (bottom portion 12) of the housing 11 on the side close to the cooling member 15 which is an example of the heat source. It is prepared between.
  • the heat radiating structure 25 has 11 battery cells 20 mounted on it, but the number of battery cells 20 mounted on the heat radiating structure 25 is not limited to 11. Further, the number of heat radiating members 27 constituting the heat radiating structure 25 provided in the battery 1 is also not particularly limited.
  • the heat radiating structure 25 is formed by cutting the heat radiating structure sheet 60 shown in FIG. 1A along the length direction of the heat radiating members 27 (Y direction in FIG. 1A) so as to include a predetermined number of heat radiating members 27. It is a structure. That is, the heat radiating structure sheet 60 is an intermediate or semi-finished product of the heat radiating structure 25. Further, the heat radiating structure 25 includes a plurality of heat radiating members 27 for increasing heat radiating from the battery cell 20, and a fixing member 50 for fixing the heat radiating member 27.
  • the heat radiating member 27 is provided on a heat conductive sheet 30 having a shape of spirally winding to transfer heat from the battery cell 20 and traveling on the annular back surface of the heat conductive sheet 30, while winding the heat conductive sheet 30. It has a through path 32 penetrating in the traveling direction, and includes a tubular cushion member 31 that is more easily deformed according to the surface shape of the battery cell 20 than the heat conductive sheet 30.
  • the fixing member 50 is a sheet-like member in which a plurality of heat radiating members 27 are placed and fixed at both ends 28, 28 in the length direction thereof, and the intermediate portions 29 other than the both end portions 28, 28 are non-contact. is there.
  • the heat conductive sheet 30 is preferably made of a material having higher heat conductivity than the cushion member 31.
  • the fixing member 50 preferably has recesses 52 that accommodate at least one end of both ends 28, 28 in the length direction of the plurality of heat radiating members 27.
  • the heat radiating member 27 is preferably adhered to the fixing member 50 with an adhesive 54.
  • the heat radiating structure 25 preferably has a heat conductive oil on the surface and / or inside of the heat conductive sheet 30 for increasing the heat conductivity from the battery cell 20 in contact with the surface to the surface.
  • the plurality of heat radiating members 27 constituting the heat radiating structure 25 have a substantially cylindrical shape when the battery cell 20 is not mounted, but when the battery cell 20 is mounted, the heat radiating member 27 is compressed by its weight and is flat. Become a form.
  • the heat conductive sheet 30 is a strip-shaped sheet that travels in the length direction of a substantially cylindrical cylinder while spirally winding the outer surface of the heat radiating member 27.
  • the heat conductive sheet 30 is a sheet containing at least one of metal, carbon, and ceramics, and has a function of conducting heat from the battery cell 20 to the cooling member 15.
  • the "cross section” or “vertical cross section” means a cross section in the inner 14 of the housing 11 of the battery 1 in the direction of vertically cutting from the upper opening surface to the bottom 12.
  • the battery 1 is, for example, a battery for an electric vehicle, and includes a large number of battery cells (which may be simply referred to as cells) 20.
  • the battery 1 includes a bottomed housing 11 that opens to one side.
  • the housing 11 is preferably made of aluminum or an aluminum-based alloy.
  • the battery cell 20 is arranged inside 14 of the housing 11.
  • An electrode (not shown) is projected above the battery cell 20.
  • the plurality of battery cells 20 are preferably brought into close contact with each other in the housing 11 by applying a force in the direction of compression from both sides thereof using screws or the like (not shown).
  • the bottom 12 of the housing 11 is provided with one or more water cooling pipes 13 for flowing cooling water, which is an example of the cooling member 15.
  • the cooling member 15 may be referred to as a cooling medium or a coolant.
  • the battery cell 20 is arranged in the housing 11 so as to sandwich the heat radiating structure 25 with the bottom portion 12. In the battery 1 having such a structure, the battery cell 20 transfers heat to the housing 11 through the heat radiating structure 25, and the heat is effectively removed by water cooling.
  • the cooling member 15 is not limited to cooling water, but is interpreted to include an organic solvent such as liquid nitrogen and ethanol.
  • the cooling member 15 is not limited to a liquid under the conditions used for cooling, and may be a gas or a solid.
  • the heat conductive sheet 30 is preferably a sheet containing carbon, and more preferably a sheet containing a carbon filler and a resin.
  • the resin can be a synthetic fiber, and in that case, an aramid fiber can be preferably used.
  • the heat conductive sheet 30 may be a carbon sheet containing almost no resin.
  • the term "carbon” as used in the present application includes any structure composed of carbon (element symbol: C) such as graphite, carbon black having lower crystallinity than graphite, expanded graphite, diamond, and diamond-like carbon having a structure similar to diamond. Is interpreted in a broad sense.
  • the heat conductive sheet 30 can be a thin sheet obtained by curing a material in which graphite fibers and carbon particles are mixed and dispersed in a resin.
  • the heat conductive sheet 30 may be carbon fiber knitted in a mesh shape, and may be blended or knitted.
  • various fillers such as graphite fibers, carbon particles and carbon fibers are all included in the concept of carbon fillers.
  • the resin may exceed 50% by mass or 50% by mass or less with respect to the total mass of the heat conductive sheet 30. That is, the heat conductive sheet 30 may or may not use resin as the main material as long as the heat conduction is not significantly hindered.
  • a thermoplastic resin can be preferably used.
  • a resin having a high melting point that does not melt when conducting heat from the battery cell 20 which is an example of a heat source is preferable, and for example, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), and the like.
  • Polyamideimide (PAI), aromatic polyamide (aramid fiber) and the like can be preferably mentioned.
  • the resin is dispersed in the gaps between the carbon fillers in the form of particles or fibers in the state before molding of the heat conductive sheet 30.
  • the heat conductive sheet 30 may be dispersed with AlN or diamond as a filler for further enhancing the heat conduction.
  • an elastomer softer than the resin may be used instead of the resin.
  • the heat conductive sheet 30 can also be a sheet containing metals and / or ceramics in place of or with carbon as described above.
  • the metal those having relatively high thermal conductivity such as aluminum, copper, and alloys containing at least one of them can be selected.
  • the ceramics ceramics having relatively high thermal conductivity such as AlN, cBN, and hBN can be selected.
  • the thermal conductivity of the heat conductive sheet 30 is preferably 10 W / mK or more.
  • the heat conductive sheet 30 is preferably a strip-shaped plate of graphite, aluminum, aluminum alloy, copper or stainless steel, and is made of a material having excellent heat conductivity and conductivity.
  • the heat conductive sheet 30 is preferably a sheet having excellent curvature (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 thermal conductivity of the heat conductive sheet 30 decreases as the thickness increases, it is necessary to determine the thickness by comprehensively considering the strength, flexibility and heat conductivity of the sheet. preferable.
  • cushion member 31 The important functions of the cushion member 31 are easiness of deformation and resilience. Resilience depends on elastic deformability. Deformability is a characteristic necessary to follow the shape of the battery cell 20, and in particular, semi-solid materials such as lithium-ion batteries and contents having liquid properties are contained in a package that is easily deformable. In the case of the battery cell 20, there are many cases where the design dimensions are irregular or the dimensional accuracy cannot be improved. Therefore, it is important to maintain the deformability of the cushion member 31 and the resilience for maintaining the following force.
  • the cushion member 31 is preferably a tubular cushion member provided with a gangway 32.
  • the cushion member 31 improves the contact between the heat conductive sheet 30 and the lower end portions even when the lower end portions of the plurality of battery cells 20 are not flat.
  • the gangway 32 has a function of facilitating the deformation of the cushion member 31, contributing to the weight reduction of the heat radiating structure 25, and enhancing the contact between the heat conductive sheet 30 and the lower end of the battery cell 20. ..
  • the cushion member 31 has a function of exerting cushioning property between the battery cell 20 and the bottom portion 12, and also has a function of a protective member for preventing the heat conductive sheet 30 from being damaged by a load applied to the heat conductive sheet 30. Have.
  • the cushion member 31 is a member having a lower thermal conductivity than the heat conductive sheet 30.
  • the through-passage 32 is formed in a circular cross-sectional shape, but the cross-sectional shape of the through-passage 32 is not limited to a circle, for example, a polygon, an ellipse, a semicircle, and a rounded apex. It may be a substantially polygonal shape or the like.
  • the gangway 32 may be composed of a plurality of gangways, for example, two gangways having a semicircular cross section whose cross-sectional circular shape is divided into two vertically or horizontally.
  • the cushion member 31 does not necessarily have to include the gangway 32.
  • the cushion member 31 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 cushion member 31 is preferably made of a material having high heat resistance that can maintain its shape without being melted or decomposed by the heat transmitted through the heat conductive sheet 30.
  • the cushion member 31 is more preferably made of a urethane-based elastomer impregnated with silicone or silicone rubber.
  • the cushion member 31 may be configured by dispersing a filler typified by AlN, cBN, hBN, diamond particles, or the like in rubber in order to increase its thermal conductivity as much as possible.
  • the cushion member 31 may contain air bubbles in the cushion member 31 or may not contain air bubbles.
  • the "cushion member” means a member that is highly flexible and can be elastically deformed so as to be in close contact with the surface of a heat source, and in this sense, it can be read as a "rubber-like elastic body".
  • the cushion member 31 can also be made of spring steel.
  • a coil spring can be arranged as the cushion member 31.
  • the spirally wound metal may be made of spring steel and arranged on the annular back surface of the heat conductive sheet 30 as a cushion member.
  • the cushion member 31 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 fixing member 50 preferably mounts and fixes a plurality of heat radiating members 27 at both ends 28, 28 in the length direction (Y direction in FIG. 1A), and both ends 28, 28. It is two sheet-like members that fix the heat radiating member 27 with a space 55 so that the intermediate portions 29 other than the above are not in contact with each other (see FIG. 2A).
  • the fixing member 50 preferably has recesses 52 that accommodate at least one end of both ends 28, 28 in the length direction of the plurality of heat radiating members 27. Further, the fixing member 50 more preferably has a plurality of recesses 52 for accommodating both end portions 28, 28 of each of the plurality of heat radiating members 27 in the length direction.
  • the fixing member 50 includes two rectangular sheets 51, 51 extending in the direction in which the plurality of heat radiating members 27 are arranged (X direction in FIG. 1A), and each of the two sheets 51, 51 has the length of the heat radiating member 27. Both ends 28 and 28 in the direction are fixed, respectively.
  • the length W1 of the sheet 51 in the lateral direction is not particularly limited, but is preferably 10 to 15 mm.
  • the shape of the recess 52 is not limited, but it is preferably a semicircular shape.
  • the depth W2 of the recess 52 is not particularly limited, but is preferably 4 to 5 mm, and more preferably 4.7 mm.
  • the length W3 between the vertices of the two adjacent recesses 52 and 52 having a semicircular shape is preferably 5 to 7 mm, more preferably 6.5 mm.
  • the space 55 between the two sheets 51 and 51 is a region where the heat radiating member 27 can be pressed toward the bottom 12 by the battery cell 20 which is an example of the heat source.
  • the space 55 is preferably large enough to allow the battery cell 20 to be inserted. More specifically, the length between the two sheets 51, 51 is preferably 200 to 350 mm, more preferably 270 to 280 mm. However, the space 55 may have a size that does not allow the battery cell 20 to be inserted.
  • the fixing member 50 is preferably made of resin or rubber, and more preferably made of PET film.
  • the fixing member 50 is preferably made of a material that is not deformed by heat radiation from the battery cell 20, and is preferably formed of, for example, a material having a heat resistant temperature of about 120 ° C. Further, the fixing member 50 is preferably formed of a flame-retardant material that does not easily burn even when ignited, and is formed of a UL94V-2 material in the UL94 standard, which is a standard indicating the degree of incombustibility of the material. It is more preferable to be done.
  • the heat radiating member 27 is preferably adhered with an adhesive 54.
  • the fixing member 50 is preferably fixed by adhering the heat radiating member 27 to the recess 52 with an adhesive 54 (see FIG. 1C).
  • the adhesive 54 is preferably an adhesive such as a silicone-based adhesive or an acrylic-based adhesive that can withstand a temperature rise due to heat dissipation from the battery cell 20.
  • the fixing member 50 is not limited to resin or rubber as long as it is a material that is not deformed by heat radiation from the battery cell 20, and may be formed of, for example, metal, wood, ceramics, or the like.
  • the heat radiating structure 25 enables positioning of the plurality of heat radiating members 27 in the heat radiating structure 25 by fixing the plurality of heat radiating members 27 to the fixing member 50, and plays a role of connecting the plurality of heat radiating members 27.
  • the heat radiating structure 25 since the plurality of heat radiating members 27 are positioned by the fixing member 50, the heat radiating member 27 can be surely brought into contact with each battery cell 20. Therefore, the heat dissipation structure 25 can enhance the uniformity of heat dissipation in each of the large number of battery cells 20, and can realize high heat transfer efficiency.
  • the distance L1 between the heat radiating members 27 becomes narrow when the heat radiating member 27 is crushed by being pressed by the battery cell 20. If the heat radiating member 27 is hardly crushed, the adhesion between the heat conductive sheet 30 and the battery cell 20 and the bottom portion 12 may be low.
  • the "circle-equivalent diameter” means the diameter of a perfect circle having the same area as the cross-sectional area of the pipe when the heat radiating member 27 is cut perpendicularly to the length direction thereof.
  • the heat radiating member 27 is a cylinder having a perfect circular cross section, its diameter is the same as the circle-equivalent diameter.
  • the distance L1 is set to 11.4% or more of the circle-equivalent diameter D of the heat-dissipating member 27, the heat-dissipating members 27 come into contact with each other when the heat-dissipating member 27 is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed. Therefore, it is possible to prevent the deformation from becoming an obstacle.
  • the distance L1 is set to 0.6D.
  • the fixing member 50 preferably has a thickness such that the intermediate portion 29 is flush with the outer surface 56 of the fixing member 50 or protrudes from the outer surface 56 from the space 55 by pressing from the battery cell 20 (see FIG. 2B). More specifically, the thickness T of the fixing member 50 is such that the intermediate portion 29 of the heat radiating member 27 bends downward to the same height as the outer surface 56 of the fixing member 50 when pressed from the battery cell 20. Alternatively, it is preferable that the intermediate portion 29 is formed so as to have a thickness capable of projecting downward from the outer surface 56 and bending.
  • the heat radiating structure 25 By constructing the heat radiating structure 25 in this way, even if the heat radiating member 27 is compressed in the vertical direction by pressing from the battery cell 20, the intermediate portion 29 can be reliably brought into contact with the bottom portion 12 of the housing 11. .. Since both ends 28, 28 of the heat radiating member 27 in the length direction are placed and fixed on the fixing member 50, the both ends 28, 28 do not come into contact with the bottom 12 of the housing 11. However, as described above, the heat radiating structure 25 is configured to ensure that the intermediate portion 29 of the heat radiating member 27 is in contact with the bottom portion 12, so that a sufficient heat radiating effect can be obtained.
  • both ends 28, 28 of the plurality of heat radiating members 27 in the length direction (Y direction in FIG. 1A) are fixed to the fixing member 50. Therefore, of the heat radiating members 27, both ends 28, 28 are crushed by being pressed by the battery cell 20 in a state of being fixed to the fixing member 50, so that even if the lower ends of the plurality of battery cells 20 are not flat, The contact between the heat conductive sheet 30 and the lower end portion is improved.
  • the intermediate portion 29 of the heat radiating member 27 excluding both ends 28 and 28 fixed to the fixing member 50 is crushed by the pressure from the battery cell 20, the battery cell 20 is placed in the intermediate portion 29. It is preferable that the batteries are arranged so as to be in contact with each other.
  • the heat radiating member 27 Since the heat radiating member 27 is positioned by the fixing member 50, the variation of the distance L1 between the heat radiating members 27 becomes small even when the heat radiating member 27 is crushed by being pressed by the battery cell 20, and the heat radiating property of each of the large number of battery cells 20 is reduced. It is possible to increase the homogenization of.
  • the plurality of heat radiating members 27 are not limited to being arranged so that the distance L1 (see FIG. 3C) between the heat radiating members 27 is evenly spaced.
  • the heat radiating structure 25 is preferably arranged by changing the distance L1 between the heat radiating members 27 so that the heat radiating members 27 are densely packed at the position of the battery cell 20 having a high temperature among the plurality of battery cells 20. ..
  • the heat radiating structure 25 is provided in the battery cell 20 having a high temperature so that the number of heat radiating members 27 in contact with the battery cell 20 having a high temperature is larger than the number of heat radiating members 27 in contact with the other battery cells 20. It is preferable to reduce the distance L1 between the heat radiating members 27 that come into contact with each other. With such a configuration, the battery 1 can further enhance the uniformity of heat dissipation in each of a large number of battery cells 20.
  • the thermally conductive oil preferably contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and consisting of one or more of metal, ceramics or carbon.
  • the heat conductive sheet 30 has a gap (hole or recess) microscopically. Normally, air is present in the gap, which may adversely affect the thermal conductivity.
  • the heat conductive oil fills the gap and exists in place of air, and has a function of improving the heat conductivity of the heat conductive sheet 30.
  • the heat conductive oil is provided on the surface of the heat conductive sheet 30, at least the surface where the battery cell 2 and the heat conductive sheet 30 come into contact with each other.
  • the "oil” of the thermally conductive oil refers to a combustible substance that is liquid or semi-solid at room temperature (any temperature in the range of 20 to 25 ° C.) that is water-insoluble. Instead of the word “oil”, “grease” or “wax” can also be used.
  • the heat conductive oil is an oil having a property that does not interfere with heat conduction when heat is transferred from the battery cell 20 to the heat conductive sheet 30.
  • a hydrocarbon-based oil or a silicone oil can be used as the heat conductive oil.
  • the thermally conductive oil preferably contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and consisting of one or more of metal, ceramics or carbon.
  • Silicone oil preferably consists 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. Reactive silicone oils include, for example, various silicone oils such as amino-modified type, epoxy-modified type, carboxy-modified type, carbinol-modified type, methacryl-modified type, mercapto-modified type, and 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. Since the silicone oil is an oil having excellent heat resistance, cold resistance, viscosity stability, and thermal conductivity, it is applied to the surface of the thermal conductive sheet 30 and interposed between the battery cell 20 and the thermal conductive sheet 30. It is particularly suitable as a thermally conductive oil.
  • the thermally conductive oil preferably contains, in addition to the oil, a thermally conductive filler composed of one or more of metal, ceramics or carbon.
  • a thermally conductive filler composed of one or more of metal, ceramics or carbon.
  • the metal include gold, silver, copper, aluminum, beryllium, and tungsten.
  • 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.
  • the heat conductive oil is interposed between the battery cell 20 and the heat conductive sheet 30 as well as between the heat conductive sheet 30 and the housing 11.
  • the heat conductive oil may be applied to the entire surface of the heat conductive sheet 30 or a part of the heat conductive sheet 30.
  • the method for allowing the heat conductive oil to exist in the heat conductive sheet 30 is not particularly limited, and any method such as spraying with a spray, coating with a brush, or immersing the heat conductive sheet 30 in the heat conductive oil. It may be due to.
  • the heat conductive oil is not an essential configuration for the heat radiating structure 25 or the battery 1, but is an additional configuration that can be suitably provided. This also applies to the second and subsequent embodiments.
  • FIG. 5A to 5C show diagrams for explaining a method of manufacturing the heat radiating member of FIG. 1A.
  • FIG. 6 shows a flowchart including the main steps of the method for manufacturing the heat radiating structure according to the first embodiment.
  • 7A to 7C show in a plan view the main steps of the method for manufacturing the heat radiating structure according to the first embodiment.
  • Heat dissipation member 27 By manufacturing in this way, the cushion member 31 in the uncured state is cured in a state where the cushion member 31 in the uncured state is in the microscopic gap of the heat conductive sheet 30, so that the cushion member 31 does not use an adhesive or the like. And the heat conductive sheet 30 can be firmly fixed.
  • the heat radiating member 27 (see FIG. 5C) thus completed has a form protruding from the outer surface of the cushion member 31 by the thickness of the heat conductive sheet 30.
  • the heat conductive sheet 30 and the cushion member 31 may be flush with each other.
  • the heat conductive oil may be applied to at least the surface of the heat conductive sheet 30 in contact with the battery cell 20.
  • the step of cutting the portion of the heat conductive sheet 30 protruding from both ends of the cushion member 31 and the step of applying the heat conductive oil are not limited to the above-mentioned timings, and at least the heat conductive sheet 30 is attached to the cushion member 31. You may go anytime after winding.
  • the heat conductive sheet 30 may be wound around the outer surface of the cushion member 31 in a completely cured state. In this case, if the outer surface of the cushion member 31 does not have adhesiveness, the heat conductive sheet 30 may be fixed to the cushion member 31 by using an adhesive or the like.
  • a mold for forming a sheet capable of forming a plurality of recesses 52 is prepared.
  • a sheet typified by PET is sandwiched between the dies and press-molded.
  • the molded body thus completed is a rectangular sheet 51 that is long in the direction in which the plurality of heat radiating members 27 are arranged (X direction in FIG. 7A).
  • the fixing member 50 is a member in which two sheets 51 are arranged with a space 55 separated from each other (see FIG. 7A).
  • the heat radiating member 27 (see FIG. 5C) and the fixing member 50 (see FIG. 7A) manufactured by the above method are used. It is a method of manufacturing the body 25.
  • the method for manufacturing the heat radiating structure 25 according to this embodiment includes a fixing step (S110) and a cutting step (S120). Hereinafter, each step will be described.
  • the fixing step is a step in which both ends 28, 28 of the plurality of heat radiating members 27 in the length direction are placed and fixed on the fixing member 50 composed of two sheets 51 preferably separated by the space 55. 7A and 7B). More specifically, the fixing step is a step of fixing by placing both ends 28, 28 of the heat radiating member 27 in a state where the adhesive 54 (see FIG. 1C) is applied to the recess 52 of the fixing member 50. Is. In the fixing step, the adhesive 54 may be applied to both ends 28, 28 of the heat radiating member 27, and the both ends 28, 28 may be placed in the recesses 52 of the fixing member 50 to fix the heat radiation member 27.
  • a heat radiating structure sheet 60 in which both ends 28, 28 of the plurality of heat radiating members 27 in the length direction are fixed to the fixing member 50 is formed.
  • the plurality of heat radiating members 27 are connected in a state of being arranged in a direction orthogonal to the length direction of the heat radiating member 27 (X direction in FIG. 7B).
  • the plurality of heat radiating members 27 are arranged so that the distance L1 between the heat radiating members 27 is 0.114D or more (see FIG. 3C).
  • the plurality of heat radiating members 27 are positioned by fixing the plurality of heat radiating members 27 to the fixing member 50.
  • the cutting step is a step of cutting the heat radiating structure sheet 60 along the length direction (Y direction in FIG. 7) so as to include a predetermined number of heat radiating members 27 (see FIGS. 7B and 7C). More specifically, the cutting step is a step of cutting the heat radiating structure sheet 60 at predetermined intervals along the length direction (for example, along the broken line in FIG. 7B). By this cutting step, one or more heat radiating structures 25 are formed from the heat radiating structure sheet 60 (see FIG. 7C).
  • the heat radiating structure sheet 60 is cut so as to include the plurality of heat radiating members 27, the heat radiating structure sheet 60 is cut at intervals perpendicular to the length direction of the heat radiating member 27 (X direction in FIG. 7B). Although there are no restrictions, it is preferably cut every 500 to 700 mm, and more preferably every 600 mm. In the cutting step, the heat radiating structure sheet 60 is not limited to being cut in parallel with the length direction of the heat radiating member 27.
  • the heat radiating structure 25 since the heat radiating structure 25 is connected by the fixing member 50, in the state of being compressed by the battery cell 20, the heat radiating member 27 follows the surface of the battery cell 20 and is crushed in the vertical and horizontal directions, and When the battery cell 20 is removed, the original shape can be restored by the elastic force of the heat radiating member 27. Further, since the heat radiating structure 25 is positioned by the fixing member 50, the heat radiating member 27 can be surely brought into contact with each battery cell 20. Therefore, the heat radiating structure 25 can suppress a situation in which the heat radiating members 27 are unevenly distributed due to, for example, vibration of an automobile, and can improve the uniformity of heat radiating properties in each of a large number of battery cells 20. Further, since each heat radiating member 27 has a structure in which the heat conductive sheet 30 is spirally wound around the outer surface of the cushion member 31, the heat radiating structure 25 does not excessively restrain the deformation of the cushion member 31.
  • a plurality of heat radiating members 27 are fixed to the fixing member 50 in the heat radiating structure 25, when the heat radiating structure 25 is attached to the battery 1, the operator attaches the plurality of heat radiating members 27 to the battery cell 20 and the housing.
  • the heat radiating structure 25 can be attached to the battery 1 by holding the fixing member 50 without performing the work of arranging the heat dissipation structure 25 with the bottom portion 12 of 11, and the workability is improved.
  • the fixing member 50 has a plurality of recesses 52, by placing the heat radiating member 27 in the recesses 52, the plurality of heat radiating members 27 are arranged in a direction orthogonal to the length direction thereof (X in FIG. 7A). It can be easily aligned in the direction).
  • the heat radiating structure sheet 60 can be easily manufactured by fixing both ends 28, 28 of the plurality of heat radiating members 27 arranged in this way in the length direction to the recesses 52 of the fixing member 50. Further, the heat radiating structure 25 is manufactured by cutting the heat radiating structure sheet 60 manufactured in this way along the length direction of the heat radiating member 27. That is, a plurality of heat radiating structures 25 can be manufactured only by cutting the heat radiating structure sheet 60 that can be manufactured without using such a complicated process at predetermined intervals along the length direction of the heat radiating member 27. Therefore, the productivity of the heat radiating structure 25 can be increased.
  • FIG. 8 shows a plan view of the heat radiating structure sheet according to the second embodiment.
  • 9A is a plan view of the heat radiating structure according to the second embodiment
  • FIG. 9B is a sectional view taken along line HH in FIG. 9A
  • FIG. 9C is an enlarged view of a region I in FIG. 9B.
  • the heat radiating structure sheet 60a and the heat radiating structure 25a according to the second embodiment are fixed in place of the fixing member 50 of the first embodiment, unlike the heat radiating structure sheet 60 and the heat radiating structure 25 according to the first embodiment.
  • a member 50a is provided.
  • the configurations other than the fixing member 50a are the same as those in the first embodiment, and thus the description thereof will be omitted.
  • the fixing member 50a a plurality of heat radiating members 27 are placed and fixed at both ends 28, 28 in the length direction (Y direction in FIG. 8), and the intermediate portions 29 other than the both end portions 28, 28 are non-contacted. It is a sheet-like member.
  • the fixing member 50a includes a rectangular sheet 51a on which a plurality of heat radiating members 27 can be placed, and a plurality of spaces 55a arranged in a direction orthogonal to the length direction of the heat radiating member 27 (X direction in FIG. 8). Be prepared. Further, unlike the fixing member 50 according to the first embodiment, the fixing member 50a does not have a recess 52.
  • the space 55a is a region where the heat radiating member 27 can be pressed toward the bottom 12 by the battery cell 20 which is an example of the heat source.
  • the space 55a is preferably large enough to allow the battery cell 20 to be inserted.
  • the space 55a is more preferably provided at a position in the sheet 51a where the intermediate portion 29 of the heat radiating member 27 is placed.
  • the fixing member 50a is configured so that the intermediate portion 29 of the heat radiating member 27 is in a non-contact state.
  • the space 55a is more preferably configured to have a length equivalent to the length of the intermediate portion 29 of the heat radiating member 27.
  • the width W4 of the space 55a is preferably formed larger than the circle-equivalent diameter D of the heat radiating structure 27, and more preferably 0.114D (see FIG. 9C). If the width W4 of the space 55a is set to 11.4% or more of the circle-equivalent diameter D of the heat-dissipating member 27, the heat-dissipating member 27 is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed. This is because it is possible to prevent the 27 from coming into contact with the sheet 51a and hindering the deformation.
  • the space 55a may have a size that does not allow the battery cell 20 to be inserted. Further, a plurality of spaces 55a may not be provided on the sheet 51a, and may be, for example, one space in which the intermediate portions 29 of the plurality of heat radiating members 27 are not in contact with each other.
  • a plurality of heat radiating members 27 are placed on the fixing member 50a so that the intermediate portion 29 of the heat radiating member 27 is arranged at the position of the space 55a, and both end portions 28 and 28 of the heat radiating member 27 are seated. It is fixed to 51a. Since the material for forming the fixing member 50a is the same as that of the fixing member 50 of the first embodiment, the description thereof will be omitted.
  • the method of fixing both ends 28, 28 of the plurality of heat radiating members 27 to the sheet 51a is particularly long as it is a fixing method capable of withstanding the temperature rise due to heat radiating from the battery cell 20, such as fixing with an adhesive. Not constrained.
  • the fixing member 50a may be provided with the recess 52 as in the first embodiment. In this case, the heat radiating structure 25a can fix the heat radiating member 27 at both ends 28, 28 to the recess 52 via the adhesive 54, as in the first embodiment.
  • the fixing member 50a preferably has a thickness such that the intermediate portion 29 can project from the space 55a to the outer surface 56a of the fixing member 50a or from the outer surface 56a by pressing from the battery cell 20 (see FIG. 9C). More specifically, the thickness T1 of the fixing member 50a is the same as the thickness (0.8D) of the intermediate portion 29 of the heat radiating member 27 deformed by the pressure from the battery cell 20, or the thickness of the intermediate portion 29. It is preferably formed to be thinner than the halfbeak.
  • the heat radiating structure 25a By constructing the heat radiating structure 25a in this way, even if the heat radiating member 27 is compressed in the vertical direction by pressing from the battery cell 20, there is a risk that the battery cell 20 will come into contact with the fixing member 50a and will not be further crushed. It can be suppressed, and when the heat radiating member 27 is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed, it can be prevented from becoming an obstacle to the deformation. Since both ends 28, 28 of the heat radiating member 27 in the length direction are placed and fixed on the fixing member 50a, the both ends 28, 28 do not come into contact with the bottom 12 of the housing 11. However, since the intermediate portion 29 of the heat radiating member 27 is in contact with the bottom portion 12, a sufficient heat radiating effect can be obtained.
  • the surface of the heat radiating member 27 on the bottom 12 side is at the same height as the surface of the fixing member 50a on the bottom 12 side, or slightly protrudes toward the bottom 12. This is because the fixing member 50 is easily brought into contact with the bottom portion 12.
  • the heat radiating structure 25a is formed by cutting the heat radiating structure sheet 60a (see FIG. 8) along the length direction of the heat radiating member 27 (Y direction in FIG. 8) so as to include a predetermined number of heat radiating members 27. It is a structure to be used.
  • the heat radiating member 27 is manufactured by the same manufacturing method as in the first embodiment (see FIGS. 5A to 5C).
  • the fixing member 50a is manufactured by preparing a sheet molding die having a plurality of spaces 55a, sandwiching a resin sheet typified by PET in the die, and press molding. Further, the method for manufacturing the heat radiating structure 25a includes a fixing step (S110) and a cutting step (S120) as in the first embodiment.
  • the fixing step is a position on the sheet 51a of the fixing member 50a on which both ends 28, 28 of the heat radiating member 27 are placed (that is, outside the space 55a in the length direction of the heat radiating member 27 (Y direction in FIG. 8)).
  • This is a step of fixing the heat radiating member 27 by placing both ends 28, 28 in a state where the adhesive 54 is applied.
  • the heat radiating member 27 may be fixed by applying an adhesive to both ends 28, 28 and placing the heat radiating member 27 on the sheet 51a.
  • both end portions 28, 28 of the plurality of heat radiating members 27 in the length direction are fixed to the fixing member 50a, and the intermediate portion 29 is suspended by the space 55a to be in a non-contact state. 60a is formed.
  • the plurality of heat radiating members 27 are positioned by fixing the plurality of heat radiating members 27 to the fixing member 50a.
  • the cutting step is a step of cutting the heat radiating structure sheet 60a along the length direction of the heat radiating member 27 (for example, along the broken line in FIG. 8) at predetermined intervals, as in the first embodiment. Since the cutting step is the same as that of the first embodiment, detailed description thereof will be omitted.
  • one or more heat radiating structures 25a are formed from the heat radiating structure sheet 60a.
  • the heat radiating structure sheet 60a and the heat radiating structure 25a thus formed also have the same effects as the heat radiating structure sheet 60 and the heat radiating structure 25 described above.
  • the heat radiating structure 25a has a structure in which a plurality of heat radiating members 27 are fixed to the fixing member 50a. Therefore, when attaching the heat radiating structure 25a to the battery 1, the operator does not have to arrange the plurality of heat radiating members 27 between the battery cell 20 and the bottom portion 12 of the housing 11, and the fixing member 50a is attached.
  • the heat radiating structure 25a can be attached to the battery 1 by holding it, and workability is improved.
  • the fixing member 50a has a frame shape in which the heat radiating member 27 is surrounded by the sheet 51a from all sides.
  • the fixing member 50a has a plurality of spaces 55a, by placing the heat radiating member 27 in the space 55a, the plurality of heat radiating members 27 can be easily aligned in the direction orthogonal to the length direction thereof. be able to. Therefore, the heat radiating structure sheet 60a can be easily manufactured by fixing both ends 28, 28 of the plurality of heat radiating members 27 arranged in this way in the length direction to the fixing member 50a. Further, the heat radiating structure 25a is manufactured by cutting the heat radiating structure sheet 60a along the length direction of the heat radiating member 27.
  • a plurality of heat radiating structures 25a can be manufactured only by cutting the heat radiating structure sheet 60a at predetermined intervals along the length direction of the heat radiating member 27. As a result, the productivity of the heat radiating structure 25a can be further increased.
  • the heat radiating structure sheets 60, 60a are a plurality of heat radiating agents that enhance heat radiating from the battery cell 20.
  • a heat conductive sheet 30 is provided with a member 27 and fixing members 50, 50a for fixing the heat radiating member 27, and the heat radiating member 27 is spirally wound to transfer heat from the battery cell 20.
  • a simple tubular cushion member 31 is provided, and the fixing members 50, 50a mount and fix a plurality of heat radiating members 27 at both ends 28, 28 in the length direction thereof, and both ends 28, 28. It is a sheet-like member in which the intermediate portion 29 other than the above is non-contact.
  • the heat radiating structure sheet 60 or the like By configuring the heat radiating structure sheet 60 or the like in this way, it is possible to provide the heat radiating structure sheet 60 or the like which is adaptable to various forms of the battery cell 20, is highly elastically deformable, and has excellent heat radiating efficiency. Can be done. Further, the heat radiating structure sheet 60 and the like are lighter due to the through-passage 32. Further, by cutting such a heat radiating structure sheet 60 or the like along the length direction of the heat radiating member 27 so as to include a predetermined number of heat radiating members 27, the heat radiating structures 25, 25a (general term for the heat radiating structure). In this case, the heat radiating structure 25 and the like can be easily manufactured), and the productivity of the heat radiating structure 25 and the like can be further improved.
  • the fixing member 50 constituting the heat radiating structure sheet 60 has recesses 52 for accommodating at least one end of both end portions 28, 28 in the length direction of the plurality of heat radiating members 27, the heat radiating member 27 is fixed to the fixing member 50. Can be easily fixed to. Therefore, in the heat radiating structure 25 formed from the heat radiating structure sheet 60 configured in this way, the heat radiating member 27 follows the surface of the battery cell 20 in the vertical and horizontal directions in the state of being compressed by the battery cell 20. When it is crushed and the battery cell 20 is removed, it can return to its original shape due to the elastic force of the heat radiating member 27.
  • the heat radiating member 27 since the heat radiating member 27 is positioned by the fixing member 50, the heat radiating member 27 can be surely brought into contact with each battery cell 20. Further, since the fixing member 50 has the recess 52, by placing the heat radiating member 27 in the recess 52, a plurality of heat radiating members 27 can be easily aligned in the direction orthogonal to the length direction thereof, and the heat radiating structure can be obtained. Manufacture of the body sheet 60 becomes easier. Therefore, the heat radiating structure 25 can be manufactured only by cutting the heat radiating structure sheet 60 along the length direction of the heat radiating member 27, and the productivity of the heat radiating structure 25 can be further improved.
  • the intermediate portion 29 is flush with the outer surfaces 56 and 56a of the fixing members 50 and 50a or protrudes from the outer surfaces 56 and 56a by pressing from the battery cell 20. It has possible thicknesses T, T1. Therefore, in the heat radiating structure 25 or the like formed from the heat radiating structure sheet 60 or the like, even if the heat radiating member 27 is compressed in the vertical direction by the pressing from the battery cell 20, the intermediate portion 29 is placed on the bottom portion 12 of the housing 11. It can be reliably contacted.
  • the heat radiating member 27 constituting the heat radiating structure sheet 60 and the like is adhered to the fixing members 50 and 50a with the adhesive 54, the plurality of heat radiating members 27 are securely fixed and positioned by the fixing members 50 and 50a. be able to. Therefore, the heat radiating structure 25 or the like formed from the heat radiating structure sheet 60 or the like can ensure that the heat radiating member 27 is in contact with each battery cell 20.
  • the heat conductive sheet 30 constituting the heat radiating structure sheet 60 and the like has a heat conductive oil on its surface for increasing the heat conductivity from the battery cell 20 to the surface.
  • the heat conductive sheet 30 has a gap (hole or recess) microscopically. Normally, air is present in the gap, which may adversely affect the thermal conductivity.
  • the heat conductive oil fills the gap and exists in place of air, and has a function of improving the heat conductivity of the heat conductive sheet 30.
  • the thermally conductive oil contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and consisting of one or more of metal, ceramics or carbon. Since the silicone oil is an oil having excellent heat resistance, cold resistance, viscosity stability, and thermal conductivity, it is applied to the surface of the thermal conductive sheet 30 and interposed between the battery cell 20 and the thermal conductive sheet 30. It is particularly suitable as a thermally conductive oil. Further, since the heat conductive oil contains a heat conductive filler, the heat conductivity of the heat conductive sheet 30 can be enhanced.
  • the method of manufacturing the heat radiating structure 25 or the like is a method of manufacturing the heat radiating structure 25 or the like shorter than the sheet 60 or the like from the above-mentioned heat radiating structure sheet 60 or the like, in the length direction of the plurality of heat radiating members 27.
  • a cutting step (S120) of cutting the body sheet 60 and the like along the length direction so as to include a predetermined number of heat radiating members 27 is included.
  • the heat radiating structure 25 or the like By manufacturing the heat radiating structure 25 or the like by using such a manufacturing method, the heat radiating structure 25 or the like can be easily formed from the heat radiating structure sheet 60 or the like, and the productivity of the heat radiating structure 25 or the like can be further improved. Can be enhanced. Further, by using such a manufacturing method, it is possible to manufacture a heat radiating structure 25 or the like which is adaptable to various forms of the battery cell 20, is highly elastically deformable, and has excellent heat radiating efficiency.
  • FIG. 10 shows a cross-sectional view when the battery cell is laid horizontally so as to be in contact with the side surface of the battery cell on the heat radiating structure, a partially enlarged view thereof, and a partial cross-sectional view when the battery cell expands during charging and discharging. Each is shown.
  • the battery cell 20 may be arranged so that the side surface of the battery cell 20 is in contact with each heat radiating member 27 such as the heat radiating structure 25.
  • the temperature of the battery cell 20 rises during charging and discharging. If the container itself of the battery cell 20 is made of a highly flexible material, the side surface of the battery cell 20 may bulge in particular. Even in such a case, as shown in FIG. 10, since each heat radiating member 27 constituting the heat radiating structure 25 or the like can be deformed according to the shape of the outer surface of the battery cell 20, the heat radiating property is high even during charging and discharging. Can be maintained.
  • the heat source includes not only the battery cell 20, 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 member 15 may be not only cooling water but also an organic solvent, liquid nitrogen, or a cooling gas.
  • the heat radiating structure 25 and the like may be arranged in a structure other than the battery 1 and the like, for example, an electronic device, a home appliance, a power generation device and the like.
  • heat-dissipating structure sheet of the present invention is broadly interpreted to include not only an intermediate such as the heat-dissipating structure 25 or the heat-dissipating structure sheet 60 or the like, which is a semi-finished product, but also the heat-dissipating structure 25 or the like. ..
  • the fixing member 50 is not limited to having the recess 52 in both of the two sheets 51 and 51, and the recess 52 may be provided in only one of the two sheets 51 and 51. Neither sheet 51, 51 may be provided with the recess 52.
  • the heat radiating member 27 may be fixed to the sheet 51 having no recess 52 by, for example, an adhesive 54 or the like.
  • the heat conductive sheet 30 may be a tubular member that covers the outer surface of the cushion member 31 instead of the spiral shape.
  • the heat radiating member 27 is not limited to being fixed to the recess 52 of the fixing member 50 with an adhesive, and may be fixed to the recess 52 by, for example, a method such as fitting.
  • the heat radiating structure sheet 60 accommodates and fixes the end 28 of one heat radiating member 27 in one recess 52, but the present invention is not limited to this.
  • the fixing member 50 may include a recess 52 having a size capable of accommodating a plurality of heat radiating members 27, and the end portions 28 of the plurality of heat radiating members may be collectively accommodated and fixed in one recess 52.
  • the plurality of heat radiating members 27 are positioned on the fixing members 50, the plurality of heat radiating members 27 are fixed to the recesses 52 via the adhesive 54 as in the above-described embodiment. Is preferable.
  • the shape of the fixing member 50 is not particularly limited, and a plurality of heat radiating members 27 are placed and fixed at both ends 28, 28 in the length direction thereof, and the intermediate portion 29 is in a non-contact shape. All you need is.
  • the sheet 51 forming the fixing member 50 is not limited to a rectangular member in a plan view, and may be, for example, a long side member such as a parallelogram, an ellipse, or a polygon. Further, the sheet 51 is not limited to having its long side and / or short side formed by a straight line, and the long side and / or short side may have irregularities such as a zigzag line.
  • the fixing member 50 is formed of two sheets 51 and 51, it may be formed of one frame-shaped member having a space 55 inside.
  • the sheet 51a forming the fixing member 50a is not a member having a square frame shape having slits in a plan view, but has an outer shape such as an ellipse, a circle, or a polygon, and has a space 55a as a slit inside thereof. You may be.
  • the plurality of components of each of the above-described embodiments can be freely combined except when they cannot be combined with each other.
  • the heat radiating structure sheet 60a according to the second embodiment may be provided with a recess 52 such as the heat radiating structure sheet 60 according to the first embodiment.
  • the heat-dissipating structure formed from the heat-dissipating structure sheet according to the present invention is used not only for automobile batteries, but also for various electronic devices such as automobiles, industrial robots, power generation devices, PCs, and household electric appliances. Can be done.

Abstract

[Problem] To provide a heat-dissipating structure sheet and a method for manufacturing a heat-dissipating structure. The heat-dissipating structure sheet is adaptable to various forms of a heat source, lightweight, highly elastically deformable, has high heat-dissipating efficiency, and makes it possible to increase heat-dissipating structure producibility. [Solution] The present invention relates to a heat-dissipating structure sheet 60 that is a sheet-like member and a method for manufacturing a heat-dissipating structure 25. The heat-dissipating structure sheet 60 comprises a plurality of heat-dissipating members 27 for increasing heat dissipation from a heat source 20, and a fixing member 50 fixing the heat-dissipating members 27. The heat-dissipating members 27 include: a heat transfer sheet 30 that extends in a spirally winding manner to transfer heat from the heat source 20; and a tubular cushioning member 31 which is provided on an annular back surface of the heat transfer sheet 30, has a through-path 32 penetrating through in a direction in which the heat transfer sheet 30 extends in a spirally winding manner, and is more easily deformable to follow the surface shape of the heat source 20 compared to the heat transfer sheet 30. The fixing member 50 is a sheet-like member which fixes the plurality of heat-dissipating members 27 with longitudinal ends 28, 28 thereof mounted to the fixing member 50, contactlessly with respect to intermediate portions 29 which are portions of the heat-dissipating members 27 other than the ends 28, 28.

Description

放熱構造体シートおよび放熱構造体の製造方法Method of manufacturing heat dissipation structure sheet and heat dissipation structure クロスリファレンスCross reference
　本出願は、２０１９年３月８日に日本国において出願された特願２０１９－０４２１５６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. 2019-042156 filed in Japan on March 8, 2019, 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、放熱構造体シートおよび放熱構造体の製造方法に関する。 The present invention relates to a heat radiating structure sheet and a method for manufacturing a heat radiating structure.
　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, and 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, conventionally, the circuit board itself is made of a material having excellent heat dissipation, a heat sink is attached, or a cooling fan is driven by a single means or a combination of multiple means. It is done. Of these, a method in which the circuit board itself is made of a material having excellent heat dissipation, for example, diamond, aluminum nitride (AlN), cubic boron nitride (cBN), etc., makes the cost of the circuit board extremely high. In addition, the arrangement of the cooling fan causes problems such as failure of the rotating device called the fan, maintenance necessity for preventing the failure, and difficulty in securing the 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 widely used as a heat radiating 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、電気自動車が普及してきている。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 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 exert its 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 the 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。さらには、バッテリーセルの容器の材質をより軽量で弾性変形することが要望されており、バッテリーセルの軽量化やバッテリーセルを除去したときに元の形状に近い形状に戻る放熱構造体が望まれている。 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 the rubber sheet is also conceivable, but since the lower surfaces of the plurality of battery cells are not flat and have steps, a gap is generated between the battery cells and the spacer, and the heat transfer efficiency is improved. descend. As 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. Furthermore, there is a demand for a lighter weight and elastically deformable material of the battery cell container, and a heat dissipation structure that returns to a shape close to the original shape when the battery cell is removed or the weight of the battery cell is removed is desired. ing.
　そこで、ゴム等で形成された筒状のクッション部材の外側面にグラファイト等の熱伝導性の高いシートを巻き付けた放熱部材を複数並べた放熱構造体も考えられる。しかしながら、このような放熱構造体を製造する場合、当該複数の放熱部材をバッテリーセルと筐体の底面との間に並べる作業が必要となり、放熱構造体の生産性を高めることが望まれている。これは、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用の放熱構造体にも通じる。 Therefore, a heat dissipation structure in which a plurality of heat dissipation members in which a sheet having high thermal conductivity such as graphite is wound around the outer surface of a tubular cushion member made of rubber or the like can be considered. However, when manufacturing such a heat radiating structure, it is necessary to arrange the plurality of heat radiating members between the battery cell and the bottom surface of the housing, and it is desired to improve the productivity of the heat radiating structure. .. This applies not only to battery cells, but also to heat dissipation structures for other heat sources such as circuit boards, electronic components or electronic device bodies.
　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、軽量で、弾性変形性に富み、放熱効率に優れ、かつ放熱構造体の生産性を高めることが可能な放熱構造体シートおよび放熱構造体の製造方法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, is adaptable to various forms of a heat source, is lightweight, has abundant elastic deformability, is excellent in heat dissipation efficiency, and enhances the productivity of a heat dissipation structure. It is an object of the present invention to provide a heat radiating structure sheet and a method for manufacturing a heat radiating structure.
（１）上記目的を達成するための一実施形態に係る放熱構造体シートは、熱源からの放熱を高める複数の放熱部材と、前記放熱部材を固定する固定部材と、を備え、前記放熱部材は、前記熱源からの熱を伝えるためのスパイラル状に巻回しながら進行する形状の熱伝導シートと、前記熱伝導シートの環状裏面に備えられ、前記熱伝導シートの巻回しながら進行する方向に貫通する貫通路を有し、前記熱伝導シートに比べて前記熱源の表面形状に合わせて変形容易な筒状のクッション部材と、を備え、前記固定部材は、前記複数の放熱部材をその長さ方向の両端部を載置して固定するとともに、前記両端部以外の中間部が非接触となるシート状の部材である。
（２）別の実施形態に係る放熱構造体シートでは、好ましくは、前記固定部材は、前記複数の放熱部材の前記長さ方向の両端部の少なくとも一端部を収容する凹部を有することを特徴とする。
（３）別の実施形態に係る放熱構造体シートでは、好ましくは、前記固定部材は、前記中間部が前記熱源からの押圧により前記固定部材の外面と面一若しくは当該外面から突出可能な厚さを有する。
（４）別の実施形態に係る放熱構造体シートでは、好ましくは、前記放熱部材は、前記固定部材に接着剤で接着されている。
（５）別の実施形態に係る放熱構造体シートでは、好ましくは、前記熱伝導シートの表面に、当該表面に接触する熱源から当該表面への熱伝導性を高めるための熱伝導性オイルを有する。
（６）別の実施形態に係る放熱構造体シートでは、好ましくは、前記熱伝導性オイルは、シリコーンオイルと、前記シリコーンオイルより熱伝導性が高く、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とを含む。
（７）一実施形態に係る放熱構造体の製造方法は、上述のいずれか１つの放熱構造体シートから当該シートより短い放熱構造体を製造する方法であって、複数の放熱部材の長さ方向の両端部を前記固定部材に載置して固定する固定ステップと、前記放熱部材の長さ方向の両端部が前記固定部材に固定された前記放熱構造体シートを、所定数の前記放熱部材を含むように前記長さ方向に沿って切断する切断ステップと、を含む。 (1) The heat radiating structure sheet according to the embodiment for achieving the above object includes a plurality of heat radiating members for enhancing heat radiating from a heat source, and a fixing member for fixing the heat radiating member. A heat conductive sheet having a shape that advances while winding in a spiral shape for transferring heat from the heat source, and an annular back surface of the heat conductive sheet that penetrates in the direction of traveling while winding the heat conductive sheet. A tubular cushion member having a through path and being more easily deformed according to the surface shape of the heat source than the heat conductive sheet is provided, and the fixing member has the plurality of heat radiating members in the length direction thereof. It is a sheet-like member in which both end portions are placed and fixed, and the intermediate portions other than the both end portions are non-contact.
(2) In the heat radiating structure sheet according to another embodiment, the fixing member preferably has recesses for accommodating at least one end of both ends of the plurality of heat radiating members in the length direction. To do.
(3) In the heat radiating structure sheet according to another embodiment, preferably, the fixing member has a thickness such that the intermediate portion can be flush with the outer surface of the fixing member or protrude from the outer surface by pressing from the heat source. Has.
(4) In the heat radiating structure sheet according to another embodiment, the heat radiating member is preferably adhered to the fixing member with an adhesive.
(5) In the heat radiating structure sheet according to another embodiment, preferably, the surface of the heat conductive sheet has a heat conductive oil for increasing the heat conductivity from the heat source in contact with the surface to the surface. ..
(6) In the heat-dissipating structure sheet according to another embodiment, preferably, the heat conductive oil has a higher thermal conductivity than the silicone oil and the silicone oil, and is composed of one or more of metal, ceramics, or carbon. Includes with conductive filler.
(7) The method for manufacturing a heat radiating structure according to one embodiment is a method for manufacturing a heat radiating structure shorter than the sheet from any one of the above radiating structure sheets, and is in the length direction of a plurality of heat radiating members. A fixing step of placing and fixing both ends of the heat-dissipating member on the fixing member, and the heat-dissipating structure sheet in which both ends of the heat-dissipating member in the length direction are fixed to the fixing member, and a predetermined number of the heat-dissipating members. Includes a cutting step of cutting along the length direction to include.
　本発明によれば、熱源の種々の形態に順応可能であって、軽量で、弾性変形性に富み、放熱効率に優れ、かつ放熱構造体の生産性を高めることが可能な放熱構造体シートおよび放熱構造体の製造方法を提供できる。 According to the present invention, a heat radiating structure sheet and a heat radiating structure sheet that can adapt to various forms of a heat source, are lightweight, have abundant elastic deformability, have excellent heat radiating efficiency, and can increase the productivity of the heat radiating structure. A method for manufacturing a heat radiating structure can be provided.
図１Ａは、第１実施形態に係る放熱構造体シートの平面図を示す。FIG. 1A shows a plan view of the heat radiating structure sheet according to the first embodiment. 図１Ｂは、図１ＡにおけるＡ－Ａ線断面図を示す。FIG. 1B shows a cross-sectional view taken along the line AA in FIG. 1A. 図１Ｃは、図１Ｂ中の領域Ｂの拡大図を示す。FIG. 1C shows an enlarged view of region B in FIG. 1B. 図２Ａは、図１Ａに示す放熱構造体シートにおけるＣ－Ｃ線断面図を示す。FIG. 2A shows a sectional view taken along line CC of the heat radiating structure sheet shown in FIG. 1A. 図２Ｂは、図２Ａ中の領域Ｅの拡大図を示す。FIG. 2B shows an enlarged view of the region E in FIG. 2A. 図２Ｃは、図１Ａに示す放熱構造体シートを矢印Ｄ方向から見た側面図を示す。FIG. 2C shows a side view of the heat radiating structure sheet shown in FIG. 1A as viewed from the direction of arrow D. 図３Ａは、第１実施形態に係る放熱構造体の平面図を示す。FIG. 3A shows a plan view of the heat radiating structure according to the first embodiment. 図３Ｂは、図３ＡにおけるＦ－Ｆ線断面図を示す。FIG. 3B shows a sectional view taken along line FF in FIG. 3A. 図３Ｃは、図３Ｂ中の領域Ｇの拡大図を示す。FIG. 3C shows an enlarged view of the region G in FIG. 3B. 図４Ａは、第１実施形態に係る放熱構造体および当該放熱構造体を備えるバッテリーの縦断面図を示す。FIG. 4A shows a vertical sectional view of the heat radiating structure according to the first embodiment and a battery including the heat radiating structure. 図４Ｂは、図４Ａ中のバッテリーセルによって放熱構造体を圧縮する前後の放熱構造体の形態変化の断面図を示す。FIG. 4B shows a cross-sectional view of a morphological change of the heat radiating structure before and after compressing the heat radiating structure by the battery cell in FIG. 4A. 図５Ａは、図１Ａの放熱部材の製造方法を説明するための図を示す。FIG. 5A shows a diagram for explaining a method of manufacturing the heat radiating member of FIG. 1A. 図５Ｂは、図１Ａの放熱部材の製造方法を説明するための図を示す。FIG. 5B shows a diagram for explaining a method of manufacturing the heat radiating member of FIG. 1A. 図５Ｃは、図１Ａの放熱部材の製造方法を説明するための図を示す。FIG. 5C shows a diagram for explaining a method of manufacturing the heat radiating member of FIG. 1A. 図６は、第１実施形態に係る放熱構造体の製造方法の主なステップを含むフローチャートを示す。FIG. 6 shows a flowchart including the main steps of the method for manufacturing the heat radiating structure according to the first embodiment. 図７Ａは、第１実施形態に係る放熱構造体の製造方法の主な工程を平面図にて示す。FIG. 7A shows in a plan view the main steps of the method for manufacturing the heat radiating structure according to the first embodiment. 図７Ｂは、第１実施形態に係る放熱構造体の製造方法の主な工程を平面図にて示す。FIG. 7B shows in a plan view the main steps of the method for manufacturing the heat radiating structure according to the first embodiment. 図７Ｃは、第１実施形態に係る放熱構造体の製造方法の主な工程を平面図にて示す。FIG. 7C shows in a plan view the main steps of the method for manufacturing the heat radiating structure according to the first embodiment. 図８は、第２実施形態に係る放熱構造体シートの平面図を示す。FIG. 8 shows a plan view of the heat radiating structure sheet according to the second embodiment. 図９Ａは、第２実施形態に係る放熱構造体の平面図を示す。FIG. 9A shows a plan view of the heat radiating structure according to the second embodiment. 図９Ｂは、図９ＡにおけるＨ－Ｈ線断面図を示す。FIG. 9B shows a sectional view taken along line OH in FIG. 9A. 図９Ｃは、図９Ｂ中の領域Ｉの拡大図を示す。FIG. 9C shows an enlarged view of region I in FIG. 9B. 図１０は、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. 10 shows a cross-sectional view when the battery cell is laid horizontally so as to be in contact with the side surface of the battery cell on the heat radiating structure, a partially enlarged view thereof, and a partial cross-sectional view when the battery cell expands during charging and discharging. Each is shown.
２０・・・バッテリーセル（熱源の一例）、２５，２５ａ・・放熱構造体、２７・・・放熱部材、２８・・・放熱部材の端部、２９・・・放熱部材の中間部、３０・・・熱伝導シート、３１・・・クッション部材、３２・・・貫通路、５０，５０ａ・・・固定部材、５２・・・凹部、５４・・・接着剤、６０，６０ａ・・・放熱構造体シート、Ｓ１１０・・・固定ステップ、Ｓ１２０・・・切断ステップ。 20 ... Battery cell (an example of heat source), 25, 25a ... Heat dissipation structure, 27 ... Heat dissipation member, 28 ... End of heat dissipation member, 29 ... Intermediate part of heat dissipation member, 30 ... Heat conduction sheet, 31 ... Cushion member, 32 ... Through path, 50, 50a ... Fixing member, 52 ... Recess, 54 ... Adhesive, 60, 60a ... Heat dissipation structure Body sheet, S110 ... fixed step, S120 ... cutting step.
　次に、本発明の各実施形態について、図面を参照して説明する。なお、以下に説明する各実施形態は、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、各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, each embodiment of the present invention will be described with reference to the drawings. It should be noted that each of the embodiments described below does not limit the invention according to the claims, and all of the elements and combinations thereof described in each embodiment are the means for solving the present invention. Is not always required.
（第１実施形態）
　図１Ａは、第１実施形態に係る放熱構造体シートの平面図、図１Ｂは、図１ＡにおけるＡ－Ａ線断面図、および図１Ｃは、図１Ｂ中の領域Ｂの拡大図をそれぞれ示す。図２Ａは、図１Ａに示す放熱構造体シートにおけるＣ－Ｃ線断面図、図２Ｂは、図２Ａ中の領域Ｅの拡大図、および図２Ｃは、図１Ａに示す放熱構造体シートを矢印Ｄ方向から見た側面図をそれぞれ示す。図３Ａは、第１実施形態に係る放熱構造体の平面図、図３Ｂは、図３ＡにおけるＦ－Ｆ線断面図、および図３Ｃは、図３Ｂ中の領域Ｇの拡大図をそれぞれ示す。図４Ａは、第１実施形態に係る放熱構造体および当該放熱構造体を備えるバッテリーの縦断面図、および図４Ｂは、図４Ａ中のバッテリーセルによって放熱構造体を圧縮する前後の放熱構造体の形態変化の断面図をそれぞれ示す。 (First Embodiment)
1A is a plan view of the heat radiating structure sheet according to the first embodiment, FIG. 1B is a sectional view taken along line AA in FIG. 1A, and FIG. 1C is an enlarged view of a region B in FIG. 1B. 2A is a sectional view taken along line CC of the heat radiating structure sheet shown in FIG. 1A, FIG. 2B is an enlarged view of a region E in FIG. 2A, and FIG. 2C shows the heat radiating structure sheet shown in FIG. 1A as an arrow D. The side views seen from the direction are shown respectively. 3A is a plan view of the heat radiating structure according to the first embodiment, FIG. 3B is a sectional view taken along line FF in FIG. 3A, and FIG. 3C is an enlarged view of a region G in FIG. 3B. FIG. 4A is a vertical sectional view of the heat radiating structure according to the first embodiment and a battery provided with the heat radiating structure, and FIG. 4B shows the heat radiating structure before and after the heat radiating structure is compressed by the battery cell in FIG. 4A. A cross-sectional view of the morphological change is shown.
　バッテリー１は、図４Ａに示すように、冷却部材１５を接触させる筐体１１内に複数のバッテリーセル２０を備えた構造を有する。放熱構造体２５は、好ましくは、熱源の一例であるバッテリーセル２０の冷却部材１５に近い側の端部（下端部）と冷却部材１５に近い側の筐体１１の一部（底部１２）との間に備えられている。ここでは、放熱構造体２５は、１１個のバッテリーセル２０を載置しているが、放熱構造体２５に載置するバッテリーセル２０の個数は１１個に限定されない。また、バッテリー１に備えられる放熱構造体２５を構成する放熱部材２７の個数についても、特に限定されない。 As shown in FIG. 4A, the battery 1 has a structure in which a plurality of battery cells 20 are provided in a housing 11 in which the cooling member 15 is brought into contact with the battery 1. The heat radiating structure 25 preferably includes an end portion (lower end portion) of the battery cell 20 on the side close to the cooling member 15 and a part (bottom portion 12) of the housing 11 on the side close to the cooling member 15 which is an example of the heat source. It is prepared between. Here, the heat radiating structure 25 has 11 battery cells 20 mounted on it, but the number of battery cells 20 mounted on the heat radiating structure 25 is not limited to 11. Further, the number of heat radiating members 27 constituting the heat radiating structure 25 provided in the battery 1 is also not particularly limited.
　放熱構造体２５は、図１Ａに示す放熱構造体シート６０を、所定数の放熱部材２７を含むように放熱部材２７の長さ方向（図１ＡのＹ方向）に沿って切断することにより形成される構造体である。すなわち、放熱構造体シート６０は、放熱構造体２５の中間体、或いは、半製品である。また、放熱構造体２５は、バッテリーセル２０からの放熱を高める複数の放熱部材２７と、放熱部材２７を固定する固定部材５０と、を備える。放熱部材２７は、バッテリーセル２０からの熱を伝えるためのスパイラル状に巻回しながら進行する形状の熱伝導シート３０と、熱伝導シート３０の環状裏面に備えられ、熱伝導シート３０の巻回しながら進行する方向に貫通する貫通路３２を有し、熱伝導シート３０に比べてバッテリーセル２０の表面形状に合わせて変形容易な筒状のクッション部材３１と、を備える。固定部材５０は、複数の放熱部材２７をその長さ方向の両端部２８，２８を載置して固定するとともに、両端部２８，２８以外の中間部２９が非接触となるシート状の部材である。ここでは、熱伝導シート３０は、好ましくは、クッション部材３１に比べて熱伝導性に優れる材料からなる。固定部材５０は、好ましくは、複数の放熱部材２７の長さ方向の両端部２８，２８の少なくとも一端部を収容する凹部５２を有する。放熱部材２７は、好ましくは、固定部材５０に接着剤５４で接着されている。放熱構造体２５は、好ましくは、熱伝導シート３０の表面および／またはその内部に、当該表面に接触するバッテリーセル２０から当該表面への熱伝導性を高めるための熱伝導性オイルを有する。放熱構造体２５を構成する複数の放熱部材２７は、バッテリーセル２０を載置していない状態では略円筒形状を有しているが、バッテリーセル２０を載置するとその重さで圧縮され扁平の形態になる。 The heat radiating structure 25 is formed by cutting the heat radiating structure sheet 60 shown in FIG. 1A along the length direction of the heat radiating members 27 (Y direction in FIG. 1A) so as to include a predetermined number of heat radiating members 27. It is a structure. That is, the heat radiating structure sheet 60 is an intermediate or semi-finished product of the heat radiating structure 25. Further, the heat radiating structure 25 includes a plurality of heat radiating members 27 for increasing heat radiating from the battery cell 20, and a fixing member 50 for fixing the heat radiating member 27. The heat radiating member 27 is provided on a heat conductive sheet 30 having a shape of spirally winding to transfer heat from the battery cell 20 and traveling on the annular back surface of the heat conductive sheet 30, while winding the heat conductive sheet 30. It has a through path 32 penetrating in the traveling direction, and includes a tubular cushion member 31 that is more easily deformed according to the surface shape of the battery cell 20 than the heat conductive sheet 30. The fixing member 50 is a sheet-like member in which a plurality of heat radiating members 27 are placed and fixed at both ends 28, 28 in the length direction thereof, and the intermediate portions 29 other than the both end portions 28, 28 are non-contact. is there. Here, the heat conductive sheet 30 is preferably made of a material having higher heat conductivity than the cushion member 31. The fixing member 50 preferably has recesses 52 that accommodate at least one end of both ends 28, 28 in the length direction of the plurality of heat radiating members 27. The heat radiating member 27 is preferably adhered to the fixing member 50 with an adhesive 54. The heat radiating structure 25 preferably has a heat conductive oil on the surface and / or inside of the heat conductive sheet 30 for increasing the heat conductivity from the battery cell 20 in contact with the surface to the surface. The plurality of heat radiating members 27 constituting the heat radiating structure 25 have a substantially cylindrical shape when the battery cell 20 is not mounted, but when the battery cell 20 is mounted, the heat radiating member 27 is compressed by its weight and is flat. Become a form.
　熱伝導シート３０は、放熱部材２７の外側面をスパイラル状に巻回しながら略円筒の長さ方向に進行する帯状のシートである。熱伝導シート３０は、金属、炭素若しくはセラミックスの少なくとも１つを含むシートであってバッテリーセル２０からの熱を冷却部材１５へと伝導させる機能を有する。なお、本願では、「断面」あるいは「縦断面」とは、バッテリー１の筐体１１の内部１４における上方開口面から底部１２へと垂直に切断する方向の断面を意味する。 The heat conductive sheet 30 is a strip-shaped sheet that travels in the length direction of a substantially cylindrical cylinder while spirally winding the outer surface of the heat radiating member 27. The heat conductive sheet 30 is a sheet containing at least one of metal, carbon, and ceramics, and has a function of conducting heat from the battery cell 20 to the cooling member 15. In the present application, the "cross section" or "vertical cross section" means a cross section in the inner 14 of the housing 11 of the battery 1 in the direction of vertically cutting from the upper opening surface to the bottom 12.
　バッテリー１の概略構成および放熱構造体２５の中間体である放熱構造体シート６０の構成部材について、より詳しく説明する。 The schematic configuration of the battery 1 and the constituent members of the heat radiating structure sheet 60, which is an intermediate of the heat radiating structure 25, will be described in more detail.
（１）バッテリーの構成の概略
　この実施形態において、バッテリー１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（単に、セルと称しても良い。）２０を備える。バッテリー１は、一方に開口する有底型の筐体１１を備える。筐体１１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２０は、筐体１１の内部１４に配置される。バッテリーセル２０の上方には、電極（不図示）が突出して設けられている。複数のバッテリーセル２０は、好ましくは、筐体１１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）。筐体１１の底部１２には、冷却部材１５の一例である冷却水を流すために、１または複数の水冷パイプ１３が備えられている。冷却部材１５は、冷却媒体あるいは冷却剤と称しても良い。バッテリーセル２０は、底部１２との間に、放熱構造体２５を挟むようにして筐体１１内に配置されている。このような構造のバッテリー１では、バッテリーセル２０は、放熱構造体２５を通じて筐体１１に伝熱して、水冷によって効果的に除熱される。なお、冷却部材１５は、冷却水に限定されず、液体窒素、エタノール等の有機溶剤も含むように解釈される。冷却部材１５は、冷却に用いられる状況下にて、液体であるとは限らず、気体あるいは固体でも良い。 (1) Outline of Battery Configuration In this embodiment, the battery 1 is, for example, a battery for an electric vehicle, and includes a large number of battery cells (which may be simply referred to as cells) 20. The battery 1 includes a bottomed housing 11 that opens to one side. The housing 11 is preferably made of aluminum or an aluminum-based alloy. The battery cell 20 is arranged inside 14 of the housing 11. An electrode (not shown) is projected above the battery cell 20. The plurality of battery cells 20 are preferably brought into close contact with each other in the housing 11 by applying a force in the direction of compression from both sides thereof using screws or the like (not shown). The bottom 12 of the housing 11 is provided with one or more water cooling pipes 13 for flowing cooling water, which is an example of the cooling member 15. The cooling member 15 may be referred to as a cooling medium or a coolant. The battery cell 20 is arranged in the housing 11 so as to sandwich the heat radiating structure 25 with the bottom portion 12. In the battery 1 having such a structure, the battery cell 20 transfers heat to the housing 11 through the heat radiating structure 25, and the heat is effectively removed by water cooling. The cooling member 15 is not limited to cooling water, but is interpreted to include an organic solvent such as liquid nitrogen and ethanol. The cooling member 15 is not limited to a liquid under the conditions used for cooling, and may be a gas or a solid.
（２）熱伝導シート
　熱伝導シート３０は、好ましくは炭素を含むシートであり、さらに好ましくは炭素フィラーと樹脂とを含むシートである。樹脂を合成繊維とすることもでき、その場合には、好適に、アラミド繊維を用いることもできる。熱伝導シート３０は、樹脂をほとんど含まない炭素製のシートでも良い。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、膨張黒鉛、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。熱伝導シート３０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。熱伝導シート３０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。 (2) Heat Conductive Sheet The heat conductive sheet 30 is preferably a sheet containing carbon, and more preferably a sheet containing a carbon filler and a resin. The resin can be a synthetic fiber, and in that case, an aramid fiber can be preferably used. The heat conductive sheet 30 may be a carbon sheet containing almost no resin. The term "carbon" as used in the present application includes any structure composed of carbon (element symbol: C) such as graphite, carbon black having lower crystallinity than graphite, expanded graphite, diamond, and diamond-like carbon having a structure similar to diamond. Is interpreted in a broad sense. In this embodiment, the heat conductive sheet 30 can be a thin sheet obtained by curing a material in which graphite fibers and carbon particles are mixed and dispersed in a resin. The heat conductive sheet 30 may be carbon fiber knitted in a mesh shape, and may be blended or knitted. In addition, various fillers such as graphite fibers, carbon particles and carbon fibers are all included in the concept of carbon fillers.
　熱伝導シート３０に樹脂を含む場合には、当該樹脂が熱伝導シート３０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、熱伝導シート３０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、熱源の一例であるバッテリーセル２０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、熱伝導シート３０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。熱伝導シート３０は、炭素フィラー、樹脂の他、熱伝導をより高めるためのフィラーとして、ＡｌＮあるいはダイヤモンドを分散していても良い。また、樹脂に代えて、樹脂よりも柔軟なエラストマーを用いても良い。熱伝導シート３０は、また、上述のような炭素に代えて若しくは炭素と共に、金属および／またはセラミックスを含むシートとすることができる。金属としては、アルミニウム、銅、それらの内の少なくとも１つを含む合金などの熱伝導性の比較的高いものを選択できる。また、セラミックスとしては、ＡｌＮ、ｃＢＮ、ｈＢＮなどの熱伝導性の比較的高いものを選択できる。 When the heat conductive sheet 30 contains a resin, the resin may exceed 50% by mass or 50% by mass or less with respect to the total mass of the heat conductive sheet 30. That is, the heat conductive sheet 30 may or may not use resin as the main material as long as the heat conduction is not significantly hindered. 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 the battery cell 20 which is an example of a heat source is preferable, and for example, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), and the like. Polyamideimide (PAI), aromatic polyamide (aramid fiber) and the like can be preferably mentioned. The resin is dispersed in the gaps between the carbon fillers in the form of particles or fibers in the state before molding of the heat conductive sheet 30. In addition to the carbon filler and the resin, the heat conductive sheet 30 may be dispersed with AlN or diamond as a filler for further enhancing the heat conduction. Further, instead of the resin, an elastomer softer than the resin may be used. The heat conductive sheet 30 can also be a sheet containing metals and / or ceramics in place of or with carbon as described above. As the metal, those having relatively high thermal conductivity such as aluminum, copper, and alloys containing at least one of them can be selected. Further, as the ceramics, ceramics having relatively high thermal conductivity such as AlN, cBN, and hBN can be selected.
　熱伝導シート３０は、導電性に優れるか否かは問わない。熱伝導シート３０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、熱伝導シート３０は、好ましくは、グラファイト、アルミニウム、アルミニウム合金、銅あるいはステンレススチールの帯状の板であり、熱伝導性と導電性に優れる材料から成る。熱伝導シート３０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、熱伝導シート３０の熱伝導率は、その厚さが増加するほど低下するため、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、その厚さを決定するのが好ましい。 It does not matter whether the heat conductive sheet 30 is excellent in conductivity or not. The thermal conductivity of the heat conductive sheet 30 is preferably 10 W / mK or more. In this embodiment, the heat conductive sheet 30 is preferably a strip-shaped plate of graphite, aluminum, aluminum alloy, copper or stainless steel, and is made of a material having excellent heat conductivity and conductivity. The heat conductive sheet 30 is preferably a sheet having excellent curvature (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, since the thermal conductivity of the heat conductive sheet 30 decreases as the thickness increases, it is necessary to determine the thickness by comprehensively considering the strength, flexibility and heat conductivity of the sheet. preferable.
（３）クッション部材
　クッション部材３１の重要な機能は変形容易性と、回復力である。回復力は、弾性変形性による。変形容易性は、バッテリーセル２０の形状に追従するために必要な特性であり、特にリチウムイオンバッテリーなどの半固形物、液体的性状も持つ内容物などを変形しやすいパッケージに収めてあるようなバッテリーセル２０の場合には、設計寸法的にも不定形または寸法精度があげられない場合が多い。このため、クッション部材３１の変形容易性や追従力を保持するための回復力の保持は重要である。 (3) Cushion member The important functions of the cushion member 31 are easiness of deformation and resilience. Resilience depends on elastic deformability. Deformability is a characteristic necessary to follow the shape of the battery cell 20, and in particular, semi-solid materials such as lithium-ion batteries and contents having liquid properties are contained in a package that is easily deformable. In the case of the battery cell 20, there are many cases where the design dimensions are irregular or the dimensional accuracy cannot be improved. Therefore, it is important to maintain the deformability of the cushion member 31 and the resilience for maintaining the following force.
　クッション部材３１は、好ましくは、貫通路３２を備える筒状クッション部材である。クッション部材３１は、複数のバッテリーセル２０の下端部が平坦でない場合でも、熱伝導シート３０と当該下端部との接触を良好にする。さらに、貫通路３２は、クッション部材３１の変形を容易にし、加えて放熱構造体２５の軽量化に寄与し、また、熱伝導シート３０とバッテリーセル２０の下端部との接触を高める機能を有する。クッション部材３１は、バッテリーセル２０と底部１２との間にあってクッション性を発揮させる機能の他に、熱伝導シート３０に加わる荷重によって熱伝導シート３０が破損等しないようにする保護部材としての機能も有する。この実施形態では、クッション部材３１は、熱伝導シート３０に比べて低熱伝導性の部材である。なお、この実施形態では、貫通路３２は、断面円形状に形成されているが、貫通路３２の断面形状は円に限定されず、例えば、多角形、楕円形、半円形、頂点が丸みを帯びた略多角形等であっても良い。また、貫通路３２は、例えば、断面円形状が上下または左右に２つに分割された２の断面半円形状の貫通路等、複数の貫通路から構成されていても良い。さらには、クッション部材３１は、必ずしも貫通路３２を備えていなくとも良い。 The cushion member 31 is preferably a tubular cushion member provided with a gangway 32. The cushion member 31 improves the contact between the heat conductive sheet 30 and the lower end portions even when the lower end portions of the plurality of battery cells 20 are not flat. Further, the gangway 32 has a function of facilitating the deformation of the cushion member 31, contributing to the weight reduction of the heat radiating structure 25, and enhancing the contact between the heat conductive sheet 30 and the lower end of the battery cell 20. .. The cushion member 31 has a function of exerting cushioning property between the battery cell 20 and the bottom portion 12, and also has a function of a protective member for preventing the heat conductive sheet 30 from being damaged by a load applied to the heat conductive sheet 30. Have. In this embodiment, the cushion member 31 is a member having a lower thermal conductivity than the heat conductive sheet 30. In this embodiment, the through-passage 32 is formed in a circular cross-sectional shape, but the cross-sectional shape of the through-passage 32 is not limited to a circle, for example, a polygon, an ellipse, a semicircle, and a rounded apex. It may be a substantially polygonal shape or the like. Further, the gangway 32 may be composed of a plurality of gangways, for example, two gangways having a semicircular cross section whose cross-sectional circular shape is divided into two vertically or horizontally. Furthermore, the cushion member 31 does not necessarily have to include the gangway 32.
　クッション部材３１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。クッション部材３１は、熱伝導シート３０を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、クッション部材３１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。クッション部材３１は、その熱伝導性を少しでも高めるために、ゴム中に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。クッション部材３１は、その内部に気泡を含むものの他、気泡を含まないものでも良い。また、「クッション部材」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。さらに、クッション部材３１の変形例としては、上記ゴム状弾性体ではなく、金属を用いて構成することもできる。例えば、クッション部材３１は、バネ鋼で構成することも可能である。さらに、クッション部材３１として、コイルバネを配置することも可能である。また、スパイラル状に巻いた金属をバネ鋼にしてクッション部材として熱伝導シート３０の環状裏面に配置しても良い。また、クッション部材３１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 cushion member 31 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 cushion member 31 is preferably made of a material having high heat resistance that can maintain its shape without being melted or decomposed by the heat transmitted through the heat conductive sheet 30. In this embodiment, the cushion member 31 is more preferably made of a urethane-based elastomer impregnated with silicone or silicone rubber. The cushion member 31 may be configured by dispersing a filler typified by AlN, cBN, hBN, diamond particles, or the like in rubber in order to increase its thermal conductivity as much as possible. The cushion member 31 may contain air bubbles in the cushion member 31 or may not contain air bubbles. Further, the "cushion member" means a member that is highly flexible and can be elastically deformed so as to be in close contact with the surface of a heat source, and in this sense, it can be read as a "rubber-like elastic body". Further, as a modification of the cushion member 31, a metal may be used instead of the rubber-like elastic body. For example, the cushion member 31 can also be made of spring steel. Further, a coil spring can be arranged as the cushion member 31. Further, the spirally wound metal may be made of spring steel and arranged on the annular back surface of the heat conductive sheet 30 as a cushion member. Further, the cushion member 31 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.
（４）固定部材
　固定部材５０は、好ましくは、複数の放熱部材２７をその長さ方向（図１ＡのＹ方向）の両端部２８，２８を載置して固定するとともに、両端部２８，２８以外の中間部２９が非接触となるように空間５５を隔てて放熱部材２７を固定する２つのシート状の部材である（図２Ａ参照）。固定部材５０は、好ましくは、複数の放熱部材２７の長さ方向の両端部２８，２８の少なくとも一端部を収容する凹部５２を有する。また、固定部材５０は、より好ましくは、複数の放熱部材２７各々の長さ方向の両端部２８，２８をそれぞれ収容する複数の凹部５２を有する。固定部材５０は、複数の放熱部材２７を並べる方向（図１ＡのＸ方向）に延びた矩形状の２つのシート５１，５１を備え、当該２つのシート５１，５１各々が放熱部材２７の長さ方向の両端部２８，２８をそれぞれ固定している。シート５１の短手方向の長さＷ１（図１ＡのＹ方向の長さ）は、特に制約はないが、１０～１５ｍｍであることが好ましい。凹部５２は、その形状に制約はないが、半円形状であることが好ましい。また、凹部５２の深さＷ２は、特に制約はないが、４～５ｍｍであることが好ましく、４．７ｍｍであることがより好ましい。また、半円形状の隣り合う２つの凹部５２，５２の頂点間の長さＷ３は、５～７ｍｍであることが好ましく、６．５ｍｍであることがより好ましい。２つのシート５１，５１の間の空間５５は、熱源の一例であるバッテリーセル２０によって放熱部材２７を底部１２に向けて押圧可能な領域である。空間５５は、バッテリーセル２０を挿通可能なほどに十分な大きさを有しているのが好ましい。より具体的には、２つのシート５１，５１間の長さは、２００～３５０ｍｍであることが好ましく、２７０～２８０ｍｍであることがより好ましい。しかし、空間５５は、バッテリーセル２０を挿通不可な大きさであっても良い。 (4) Fixing member The fixing member 50 preferably mounts and fixes a plurality of heat radiating members 27 at both ends 28, 28 in the length direction (Y direction in FIG. 1A), and both ends 28, 28. It is two sheet-like members that fix the heat radiating member 27 with a space 55 so that the intermediate portions 29 other than the above are not in contact with each other (see FIG. 2A). The fixing member 50 preferably has recesses 52 that accommodate at least one end of both ends 28, 28 in the length direction of the plurality of heat radiating members 27. Further, the fixing member 50 more preferably has a plurality of recesses 52 for accommodating both end portions 28, 28 of each of the plurality of heat radiating members 27 in the length direction. The fixing member 50 includes two rectangular sheets 51, 51 extending in the direction in which the plurality of heat radiating members 27 are arranged (X direction in FIG. 1A), and each of the two sheets 51, 51 has the length of the heat radiating member 27. Both ends 28 and 28 in the direction are fixed, respectively. The length W1 of the sheet 51 in the lateral direction (the length in the Y direction of FIG. 1A) is not particularly limited, but is preferably 10 to 15 mm. The shape of the recess 52 is not limited, but it is preferably a semicircular shape. The depth W2 of the recess 52 is not particularly limited, but is preferably 4 to 5 mm, and more preferably 4.7 mm. Further, the length W3 between the vertices of the two adjacent recesses 52 and 52 having a semicircular shape is preferably 5 to 7 mm, more preferably 6.5 mm. The space 55 between the two sheets 51 and 51 is a region where the heat radiating member 27 can be pressed toward the bottom 12 by the battery cell 20 which is an example of the heat source. The space 55 is preferably large enough to allow the battery cell 20 to be inserted. More specifically, the length between the two sheets 51, 51 is preferably 200 to 350 mm, more preferably 270 to 280 mm. However, the space 55 may have a size that does not allow the battery cell 20 to be inserted.
　固定部材５０は、好ましくは、樹脂あるいはゴムで形成され、より好ましくは、ＰＥＴフィルムで形成される。なお、固定部材５０は、バッテリーセル２０からの放熱により変形しない材料であることが好ましく、例えば、耐熱温度１２０℃程度の材料で形成されることが好ましい。また、固定部材５０は、火をつけても燃えにくい難燃性の材料で形成されることが好ましく、材料の燃えにくさの度合を表す規格であるＵＬ９４規格において、ＵＬ９４Ｖ－２の材料で形成されることがより好ましい。固定部材５０は、好ましくは、放熱部材２７が接着剤５４で接着される。より具体的には、固定部材５０は、凹部５２に放熱部材２７が接着剤５４で接着されて固定されることが好ましい（図１Ｃ参照）。接着剤５４は、例えば、シリコーン系接着剤、アクリル系接着剤等、バッテリーセル２０からの放熱による温度上昇に耐え得る接着剤であることが好ましい。なお、固定部材５０は、バッテリーセル２０からの放熱により変形しない材料であれば、樹脂あるいはゴムに限定されず、例えば、金属、木材、セラミックス等で形成されていても良い。 The fixing member 50 is preferably made of resin or rubber, and more preferably made of PET film. The fixing member 50 is preferably made of a material that is not deformed by heat radiation from the battery cell 20, and is preferably formed of, for example, a material having a heat resistant temperature of about 120 ° C. Further, the fixing member 50 is preferably formed of a flame-retardant material that does not easily burn even when ignited, and is formed of a UL94V-2 material in the UL94 standard, which is a standard indicating the degree of incombustibility of the material. It is more preferable to be done. In the fixing member 50, the heat radiating member 27 is preferably adhered with an adhesive 54. More specifically, the fixing member 50 is preferably fixed by adhering the heat radiating member 27 to the recess 52 with an adhesive 54 (see FIG. 1C). The adhesive 54 is preferably an adhesive such as a silicone-based adhesive or an acrylic-based adhesive that can withstand a temperature rise due to heat dissipation from the battery cell 20. The fixing member 50 is not limited to resin or rubber as long as it is a material that is not deformed by heat radiation from the battery cell 20, and may be formed of, for example, metal, wood, ceramics, or the like.
　放熱構造体２５は、固定部材５０に複数の放熱部材２７を固定することにより、放熱構造体２５における複数の放熱部材２７の位置決めを可能とし、かつ複数の放熱部材２７を連結する役割を担う。高い伝熱効率を実現するためには、多数のバッテリーセル２０各々の温度が均一となるように、多数のバッテリーセル２０各々から均一に放熱させることが望ましい。そのためには、各バッテリーセル２０に接触する放熱部材２７の数が均一となるように、複数の放熱部材２７を配置することが好ましい。放熱構造体２５は、固定部材５０により複数の放熱部材２７が位置決めされるため、各バッテリーセル２０に放熱部材２７を確実に接触するようにできる。したがって、放熱構造体２５は、多数のバッテリーセル２０各々における放熱性の均一化を高めることができ、高い伝熱効率を実現できる。 The heat radiating structure 25 enables positioning of the plurality of heat radiating members 27 in the heat radiating structure 25 by fixing the plurality of heat radiating members 27 to the fixing member 50, and plays a role of connecting the plurality of heat radiating members 27. In order to realize high heat transfer efficiency, it is desirable to dissipate heat uniformly from each of the large number of battery cells 20 so that the temperature of each of the large number of battery cells 20 becomes uniform. For that purpose, it is preferable to arrange a plurality of heat radiating members 27 so that the number of heat radiating members 27 in contact with each battery cell 20 is uniform. In the heat radiating structure 25, since the plurality of heat radiating members 27 are positioned by the fixing member 50, the heat radiating member 27 can be surely brought into contact with each battery cell 20. Therefore, the heat dissipation structure 25 can enhance the uniformity of heat dissipation in each of the large number of battery cells 20, and can realize high heat transfer efficiency.
　放熱部材２７間の距離Ｌ１は、放熱部材２７がバッテリーセル２０からの押圧を受けて潰れる際に、狭くなる。放熱部材２７がほとんど潰れない場合には、熱伝導シート３０とバッテリーセル２０および底部１２との密着性が低くなる可能性がある。かかるリスクを低減するのに適切な放熱部材２７の上下方向、すなわちバッテリーセル２０の底から底部１２の面に向かう垂線方向に圧縮されたときの厚みは、少なくとも、放熱部材２７の管径（＝円換算直径：Ｄ）の８０％である。ここで、「円換算直径」とは、放熱部材２７をその長さ方向と垂直に切断したときの管断面の面積と同じ面積の真円の直径を意味する。放熱部材２７が真円の断面をもった円筒の場合には、その直径は円換算直径と同一である。放熱部材２７は、上記の圧縮を受けると、バッテリーセル２０および底部１２と接する面を平面とし、放熱部材２７間の距離Ｌ１の方向を略円弧断面とするように変形するとみなすことができる（図３Ｃを参照）。放熱部材２７が円換算直径Ｄの８０％に相当する０．８Ｄの厚さに潰れた場合、放熱部材２７がどの程度、距離Ｌ１の方向に拡がるかを計算する。図３Ｃに示すように、潰れた放熱部材２７において、その左右方向に存在する半円弧の長さの総長は、０．８πＤである。また、底部１２に接する平面の長さは、放熱部材２７の管円周から、上記の半円弧の長さの総長を差し引いた長さの半分であるから、（πＤ－０．８πＤ）／２＝０．３１４Ｄである。平面の左右方向に拡張した円弧部分の長さは、０．４Ｄ×２＝０．８Ｄである。したがって、潰れた放熱部材２７が元の放熱部材２７から距離Ｌ１の方向に拡がった距離は、０．３１４Ｄ＋０．８Ｄ－Ｄ＝０．１１４Ｄとなる。距離Ｌ１を十分に大きくすれば、放熱部材２７は隣の放熱部材２７と接触しない。逆に、距離Ｌ１が小さすぎると、放熱部材２７が上下方向に圧縮されても、隣の放熱部材２７に接触して、それ以上に潰れなくなる可能性がある。距離Ｌ１を放熱部材２７の円換算直径Ｄの１１．４％以上にすれば、放熱部材２７が円換算直径Ｄの８０％の厚さに圧縮されて変形する際に、放熱部材２７同士が接触して、当該変形の障害となることを防止できる。なお、この実施形態では、距離Ｌ１を０．６Ｄとしている。 The distance L1 between the heat radiating members 27 becomes narrow when the heat radiating member 27 is crushed by being pressed by the battery cell 20. If the heat radiating member 27 is hardly crushed, the adhesion between the heat conductive sheet 30 and the battery cell 20 and the bottom portion 12 may be low. The thickness of the heat radiating member 27 suitable for reducing such a risk when compressed in the vertical direction, that is, in the vertical direction from the bottom of the battery cell 20 toward the surface of the bottom 12, is at least the pipe diameter of the heat radiating member 27 (=). Yen-converted diameter: 80% of D). Here, the "circle-equivalent diameter" means the diameter of a perfect circle having the same area as the cross-sectional area of the pipe when the heat radiating member 27 is cut perpendicularly to the length direction thereof. When the heat radiating member 27 is a cylinder having a perfect circular cross section, its diameter is the same as the circle-equivalent diameter. Upon receiving the above compression, the heat radiating member 27 can be regarded as being deformed so that the surface in contact with the battery cell 20 and the bottom portion 12 is a flat surface and the direction of the distance L1 between the heat radiating members 27 is a substantially arc cross section (FIG. See 3C). When the heat radiating member 27 is crushed to a thickness of 0.8D corresponding to 80% of the circle-equivalent diameter D, how much the heat radiating member 27 expands in the direction of the distance L1 is calculated. As shown in FIG. 3C, in the crushed heat radiating member 27, the total length of the semicircular arcs existing in the left-right direction is 0.8πD. Further, since the length of the plane in contact with the bottom portion 12 is half the length obtained by subtracting the total length of the above-mentioned semicircular arc from the circumference of the pipe of the heat radiating member 27, (πD-0.8πD) / 2 = 0.314D. The length of the arc portion extended in the left-right direction of the plane is 0.4D × 2 = 0.8D. Therefore, the distance that the crushed heat radiating member 27 extends from the original heat radiating member 27 in the direction of the distance L1 is 0.314D + 0.8D−D = 0.114D. If the distance L1 is sufficiently increased, the heat radiating member 27 does not come into contact with the adjacent heat radiating member 27. On the contrary, if the distance L1 is too small, even if the heat radiating member 27 is compressed in the vertical direction, it may come into contact with the adjacent heat radiating member 27 and not be further crushed. If the distance L1 is set to 11.4% or more of the circle-equivalent diameter D of the heat-dissipating member 27, the heat-dissipating members 27 come into contact with each other when the heat-dissipating member 27 is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed. Therefore, it is possible to prevent the deformation from becoming an obstacle. In this embodiment, the distance L1 is set to 0.6D.
　固定部材５０は、中間部２９がバッテリーセル２０からの押圧により空間５５から固定部材５０の外面５６と面一若しくは外面５６から突出可能な厚さを有することが好ましい（図２Ｂ参照）。より具体的には、固定部材５０は、その厚さＴが、バッテリーセル２０からの押圧により、放熱部材２７の中間部２９が固定部材５０の外面５６と同じ高さまで下方向に撓む厚さ、若しくは、中間部２９が外面５６よりも下方向に突出して撓むことが可能な厚さとなるよう形成されることが好ましい。このように放熱構造体２５を構成することにより、バッテリーセル２０からの押圧により放熱部材２７が上下方向に圧縮されても、中間部２９を筐体１１の底部１２に確実に接触させることができる。なお、放熱部材２７の長さ方向両端部２８，２８は固定部材５０の上に載って固定されているので、当該両端部２８，２８は、筐体１１の底部１２に接触しない。しかし、放熱構造体２５は、上述のように、放熱部材２７の中間部２９を底部１２に確実に接触させるよう構成されるため、十分な放熱効果を得ることができる。 The fixing member 50 preferably has a thickness such that the intermediate portion 29 is flush with the outer surface 56 of the fixing member 50 or protrudes from the outer surface 56 from the space 55 by pressing from the battery cell 20 (see FIG. 2B). More specifically, the thickness T of the fixing member 50 is such that the intermediate portion 29 of the heat radiating member 27 bends downward to the same height as the outer surface 56 of the fixing member 50 when pressed from the battery cell 20. Alternatively, it is preferable that the intermediate portion 29 is formed so as to have a thickness capable of projecting downward from the outer surface 56 and bending. By constructing the heat radiating structure 25 in this way, even if the heat radiating member 27 is compressed in the vertical direction by pressing from the battery cell 20, the intermediate portion 29 can be reliably brought into contact with the bottom portion 12 of the housing 11. .. Since both ends 28, 28 of the heat radiating member 27 in the length direction are placed and fixed on the fixing member 50, the both ends 28, 28 do not come into contact with the bottom 12 of the housing 11. However, as described above, the heat radiating structure 25 is configured to ensure that the intermediate portion 29 of the heat radiating member 27 is in contact with the bottom portion 12, so that a sufficient heat radiating effect can be obtained.
　放熱構造体２５は、複数の放熱部材２７の長さ方向（図１ＡのＹ方向）の両端部２８，２８が固定部材５０に固定されている。このため、放熱部材２７のうち当該両端部２８，２８が固定部材５０に固定された状態でバッテリーセル２０からの押圧を受けて潰れるため、複数のバッテリーセル２０の下端部が平坦でない場合でも、熱伝導シート３０と当該下端部との接触が良好になる。なお、放熱構造体２５は、放熱部材２７のうち固定部材５０に固定された両端部２８，２８を除く中間部２９がバッテリーセル２０からの押圧を受けて潰れるため、中間部２９にバッテリーセル２０を接触させるように、配置されるのが好ましい。放熱部材２７は固定部材５０により位置決めされているので、バッテリーセル２０からの押圧を受けて潰れた際にも放熱部材２７間の距離Ｌ１のばらつきが小さくなり、多数のバッテリーセル２０各々における放熱性の均一化を高めることができる。なお、複数の放熱部材２７は、放熱部材２７間の距離Ｌ１（図３Ｃ参照）が等間隔となるよう配置されることに限定されない。放熱構造体２５は、好ましくは、複数のバッテリーセル２０のうち温度の高いバッテリーセル２０の位置に放熱部材２７を密集させるように、放熱部材２７間の距離Ｌ１を変化させて配置されても良い。すなわち、放熱構造体２５は、温度の高いバッテリーセル２０に接触する放熱部材２７の数がその他のバッテリーセル２０に接触する放熱部材２７の数より多くなるように、当該温度の高いバッテリーセル２０に接触する放熱部材２７間の距離Ｌ１を小さくすることが好ましい。このように構成することにより、バッテリー１は、多数のバッテリーセル２０各々における放熱性の均一化をさらに高めることができる。 In the heat radiating structure 25, both ends 28, 28 of the plurality of heat radiating members 27 in the length direction (Y direction in FIG. 1A) are fixed to the fixing member 50. Therefore, of the heat radiating members 27, both ends 28, 28 are crushed by being pressed by the battery cell 20 in a state of being fixed to the fixing member 50, so that even if the lower ends of the plurality of battery cells 20 are not flat, The contact between the heat conductive sheet 30 and the lower end portion is improved. In the heat radiating structure 25, since the intermediate portion 29 of the heat radiating member 27 excluding both ends 28 and 28 fixed to the fixing member 50 is crushed by the pressure from the battery cell 20, the battery cell 20 is placed in the intermediate portion 29. It is preferable that the batteries are arranged so as to be in contact with each other. Since the heat radiating member 27 is positioned by the fixing member 50, the variation of the distance L1 between the heat radiating members 27 becomes small even when the heat radiating member 27 is crushed by being pressed by the battery cell 20, and the heat radiating property of each of the large number of battery cells 20 is reduced. It is possible to increase the homogenization of. The plurality of heat radiating members 27 are not limited to being arranged so that the distance L1 (see FIG. 3C) between the heat radiating members 27 is evenly spaced. The heat radiating structure 25 is preferably arranged by changing the distance L1 between the heat radiating members 27 so that the heat radiating members 27 are densely packed at the position of the battery cell 20 having a high temperature among the plurality of battery cells 20. .. That is, the heat radiating structure 25 is provided in the battery cell 20 having a high temperature so that the number of heat radiating members 27 in contact with the battery cell 20 having a high temperature is larger than the number of heat radiating members 27 in contact with the other battery cells 20. It is preferable to reduce the distance L1 between the heat radiating members 27 that come into contact with each other. With such a configuration, the battery 1 can further enhance the uniformity of heat dissipation in each of a large number of battery cells 20.
（５）熱伝導性オイル
　熱伝導性オイルは、好ましくは、シリコーンオイルと、シリコーンオイルより熱伝導性が高く、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とを含む。熱伝導シート３０は、微視的に、隙間（孔あるいは凹部）を有する。通常、当該隙間には空気が存在し、熱伝導性に悪影響を及ぼす可能性が有る。熱伝導性オイルは、その隙間を埋めて、空気に代わって存在することになり、熱伝導シート３０の熱伝導性を向上させる機能を有する。 (5) Thermally Conductive Oil The thermally conductive oil preferably contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and consisting of one or more of metal, ceramics or carbon. The heat conductive sheet 30 has a gap (hole or recess) microscopically. Normally, air is present in the gap, which may adversely affect the thermal conductivity. The heat conductive oil fills the gap and exists in place of air, and has a function of improving the heat conductivity of the heat conductive sheet 30.
　熱伝導性オイルは、熱伝導シート３０の表面、少なくともバッテリーセル２と熱伝導シート３０とが接触する面に備えられている。本願において、熱伝導性オイルの「オイル」は、非水溶性の常温（２０～２５℃の範囲の任意の温度）で液状若しくは半固形状の可燃物質をいう。「オイル」という文言に代え、「グリース」あるいは「ワックス」を用いることもできる。熱伝導性オイルは、バッテリーセル２０から熱伝導シート３０に熱を伝える際に熱伝導の障害にならない性質のオイルである。熱伝導性オイルには、炭化水素系のオイル、シリコーンオイルを用いることができる。熱伝導性オイルは、好ましくは、シリコーンオイルと、シリコーンオイルより熱伝導性が高く、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とを含む。 The heat conductive oil is provided on the surface of the heat conductive sheet 30, at least the surface where the battery cell 2 and the heat conductive sheet 30 come into contact with each other. In the present application, the "oil" of the thermally conductive oil refers to a combustible substance that is liquid or semi-solid at room temperature (any temperature in the range of 20 to 25 ° C.) that is water-insoluble. Instead of the word "oil", "grease" or "wax" can also be used. The heat conductive oil is an oil having a property that does not interfere with heat conduction when heat is transferred from the battery cell 20 to the heat conductive sheet 30. As the heat conductive oil, a hydrocarbon-based oil or a silicone oil can be used. The thermally conductive oil preferably contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and consisting of one or more of metal, ceramics or carbon.
　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。シリコーンオイルは、耐熱性、耐寒性、粘度安定性、熱伝導性に優れたオイルであるため、熱伝導シート３０の表面に塗布して、バッテリーセル２０と熱伝導シート３０との間に介在させる熱伝導性オイルとして特に好適である。 Silicone oil preferably consists 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. Reactive silicone oils include, for example, various silicone oils such as amino-modified type, epoxy-modified type, carboxy-modified type, carbinol-modified type, methacryl-modified type, mercapto-modified type, and 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. Since the silicone oil is an oil having excellent heat resistance, cold resistance, viscosity stability, and thermal conductivity, it is applied to the surface of the thermal conductive sheet 30 and interposed between the battery cell 20 and the thermal conductive sheet 30. It is particularly suitable as a thermally conductive oil.
　熱伝導性オイルは、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。 The thermally conductive oil preferably contains, in addition to the oil, a thermally conductive filler composed of one or more of metal, ceramics or carbon. Examples of the metal include gold, silver, copper, aluminum, beryllium, and tungsten. Examples of 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.
　熱伝導性オイルは、バッテリーセル２０と熱伝導シート３０との間に介在する他、熱伝導シート３０と筐体１１との間に介在する方が好ましい。熱伝導性オイルは、熱伝導シート３０の全面に塗布されていても、熱伝導シート３０の一部分に塗布されていても良い。熱伝導性オイルを熱伝導シート３０に存在させる方法は、特に制約はなく、スプレーを用いた噴霧、刷毛等を用いた塗布、熱伝導性オイル中への熱伝導シート３０の浸漬など、如何なる方法によるものでも良い。なお、熱伝導性オイルは、放熱構造体２５あるいはバッテリー１にとって必須の構成ではなく、好適に備えることのできる追加的な構成である。これは、第２実施形態以降でも同様である。 It is preferable that the heat conductive oil is interposed between the battery cell 20 and the heat conductive sheet 30 as well as between the heat conductive sheet 30 and the housing 11. The heat conductive oil may be applied to the entire surface of the heat conductive sheet 30 or a part of the heat conductive sheet 30. The method for allowing the heat conductive oil to exist in the heat conductive sheet 30 is not particularly limited, and any method such as spraying with a spray, coating with a brush, or immersing the heat conductive sheet 30 in the heat conductive oil. It may be due to. The heat conductive oil is not an essential configuration for the heat radiating structure 25 or the battery 1, but is an additional configuration that can be suitably provided. This also applies to the second and subsequent embodiments.
　次に、本発明に係る放熱構造体の製造方法について説明する。 Next, a method for manufacturing the heat radiating structure according to the present invention will be described.
　図５Ａ～図５Ｃは、図１Ａの放熱部材の製造方法を説明するための図を示す。図６は、第１実施形態に係る放熱構造体の製造方法の主なステップを含むフローチャートを示す。図７Ａ～図７Ｃは、第１実施形態に係る放熱構造体の製造方法の主な工程を平面図にて示す。 5A to 5C show diagrams for explaining a method of manufacturing the heat radiating member of FIG. 1A. FIG. 6 shows a flowchart including the main steps of the method for manufacturing the heat radiating structure according to the first embodiment. 7A to 7C show in a plan view the main steps of the method for manufacturing the heat radiating structure according to the first embodiment.
１．放熱部材の製造方法
　まず、クッション部材３１を成形する。次に、帯状の熱伝導シート３０をクッション部材３１の外側面にスパイラル状に巻く（図５Ａ参照）。このとき、クッション部材３１が完全には硬化していない未硬化状態で、熱伝導シート３０をクッション部材３１の外側面に巻き、その後、加温によりクッション部材３１を完全に硬化させる。そして、帯状の熱伝導シート３０のクッション部材３１の両端からはみ出した部分があればカットする（図５Ｂ参照）。最後に、熱伝導シート３０の表面に、熱伝導性オイルを塗布する。放熱部材２７このように製造することにより、熱伝導シート３０の微視的な隙間に未硬化状態のクッション部材３１が入り込んだ状態で硬化されるため、接着剤等を使用しなくともクッション部材３１と熱伝導シート３０とを強固に固定することができる。 1. 1. Manufacturing Method of Heat Dissipating Member First, the cushion member 31 is molded. Next, the band-shaped heat conductive sheet 30 is spirally wound around the outer surface of the cushion member 31 (see FIG. 5A). At this time, in an uncured state in which the cushion member 31 is not completely cured, the heat conductive sheet 30 is wound around the outer surface of the cushion member 31, and then the cushion member 31 is completely cured by heating. Then, if there is a portion protruding from both ends of the cushion member 31 of the band-shaped heat conductive sheet 30, it is cut (see FIG. 5B). Finally, the heat conductive oil is applied to the surface of the heat conductive sheet 30. Heat dissipation member 27 By manufacturing in this way, the cushion member 31 in the uncured state is cured in a state where the cushion member 31 in the uncured state is in the microscopic gap of the heat conductive sheet 30, so that the cushion member 31 does not use an adhesive or the like. And the heat conductive sheet 30 can be firmly fixed.
　こうして出来上がった放熱部材２７（図５Ｃ参照）は、クッション部材３１の外側面よりも熱伝導シート３０の厚さ分だけ突出した形態を有する。ただし、熱伝導シート３０とクッション部材３１とは、面一であっても良い。また、熱伝導性オイルは、熱伝導シート３０のうち少なくともバッテリーセル２０と接触する面に塗布されれば良い。熱伝導シート３０のクッション部材３１の両端からはみ出した部分をカットする工程および熱伝導性オイルを塗布する工程は、上述のタイミングで行うことに限定されず、少なくともクッション部材３１に熱伝導シート３０を巻いた後であれば、いつ行ってもよい。また、熱伝導シート３０は、クッション部材３１を完全に硬化させた状態で、その外側面に巻いてもよい。この場合、クッション部材３１の外側面が粘着性を有していなければ、接着剤等を使用して熱伝導シート３０をクッション部材３１に固定してもよい。 The heat radiating member 27 (see FIG. 5C) thus completed has a form protruding from the outer surface of the cushion member 31 by the thickness of the heat conductive sheet 30. However, the heat conductive sheet 30 and the cushion member 31 may be flush with each other. Further, the heat conductive oil may be applied to at least the surface of the heat conductive sheet 30 in contact with the battery cell 20. The step of cutting the portion of the heat conductive sheet 30 protruding from both ends of the cushion member 31 and the step of applying the heat conductive oil are not limited to the above-mentioned timings, and at least the heat conductive sheet 30 is attached to the cushion member 31. You may go anytime after winding. Further, the heat conductive sheet 30 may be wound around the outer surface of the cushion member 31 in a completely cured state. In this case, if the outer surface of the cushion member 31 does not have adhesiveness, the heat conductive sheet 30 may be fixed to the cushion member 31 by using an adhesive or the like.
２．固定部材の製造方法
　まず、複数の凹部５２を形成可能なシート成形用の金型を用意する。次に、ＰＥＴに代表されるシートを当該金型に挟持させてプレス成形する。こうして出来上がった成形体は、複数の放熱部材２７を並べる方向（図７ＡのＸ方向）に長い矩形状のシート５１である。固定部材５０は、２枚のシート５１を空間５５を隔てて配置した部材である（図７Ａ）参照）。 2. 2. Manufacturing Method of Fixing Member First, a mold for forming a sheet capable of forming a plurality of recesses 52 is prepared. Next, a sheet typified by PET is sandwiched between the dies and press-molded. The molded body thus completed is a rectangular sheet 51 that is long in the direction in which the plurality of heat radiating members 27 are arranged (X direction in FIG. 7A). The fixing member 50 is a member in which two sheets 51 are arranged with a space 55 separated from each other (see FIG. 7A).
３．放熱構造体の製造方法
　この実施形態に係る放熱構造体２５の製造方法は、上述の方法で製造された放熱部材２７（図５Ｃ参照）および固定部材５０（図７Ａ参照）を用いて、放熱構造体２５を製造する方法である。この実施形態に係る放熱構造体２５の製造方法は、固定ステップ（Ｓ１１０）および切断ステップ（Ｓ１２０）を含む。以下、各工程について説明する。 3. 3. Manufacturing Method of Heat Dissipating Structure In the manufacturing method of the heat radiating structure 25 according to this embodiment, the heat radiating member 27 (see FIG. 5C) and the fixing member 50 (see FIG. 7A) manufactured by the above method are used. It is a method of manufacturing the body 25. The method for manufacturing the heat radiating structure 25 according to this embodiment includes a fixing step (S110) and a cutting step (S120). Hereinafter, each step will be described.
　３．１　固定ステップ（Ｓ１１０）
　固定ステップは、複数の放熱部材２７の長さ方向の両端部２８，２８を、好ましくは、空間５５を隔てた２枚のシート５１から成る固定部材５０に載置して固定するステップである（図７Ａおよび図７Ｂ参照）。固定ステップは、より具体的には、固定部材５０の凹部５２に、接着剤５４（図１Ｃ参照）を塗布した状態で、放熱部材２７の両端部２８，２８を載置することにより固定するステップである。なお、固定ステップでは、放熱部材２７の両端部２８，２８に接着剤５４を塗布して、固定部材５０の凹部５２に両端部２８，２８を載置することにより固定しても良い。この固定ステップにより、複数の放熱部材２７の長さ方向の両端部２８，２８が固定部材５０に固定された放熱構造体シート６０が形成される。複数の放熱部材２７は、固定部材５０に固定されることにより、放熱部材２７の長さ方向と直交する方向（図７ＢのＸ方向）に並べた状態で連結される。このとき、複数の放熱部材２７は、放熱部材２７間の距離Ｌ１を０．１１４Ｄ以上として並べられることが好ましい（図３Ｃ参照）。放熱構造体シート６０は、固定部材５０に複数の放熱部材２７が固定されることにより、複数の放熱部材２７が位置決めされる。 3.1 Fixed step (S110)
The fixing step is a step in which both ends 28, 28 of the plurality of heat radiating members 27 in the length direction are placed and fixed on the fixing member 50 composed of two sheets 51 preferably separated by the space 55. 7A and 7B). More specifically, the fixing step is a step of fixing by placing both ends 28, 28 of the heat radiating member 27 in a state where the adhesive 54 (see FIG. 1C) is applied to the recess 52 of the fixing member 50. Is. In the fixing step, the adhesive 54 may be applied to both ends 28, 28 of the heat radiating member 27, and the both ends 28, 28 may be placed in the recesses 52 of the fixing member 50 to fix the heat radiation member 27. By this fixing step, a heat radiating structure sheet 60 in which both ends 28, 28 of the plurality of heat radiating members 27 in the length direction are fixed to the fixing member 50 is formed. By fixing the heat radiating member 27 to the fixing member 50, the plurality of heat radiating members 27 are connected in a state of being arranged in a direction orthogonal to the length direction of the heat radiating member 27 (X direction in FIG. 7B). At this time, it is preferable that the plurality of heat radiating members 27 are arranged so that the distance L1 between the heat radiating members 27 is 0.114D or more (see FIG. 3C). In the heat radiating structure sheet 60, the plurality of heat radiating members 27 are positioned by fixing the plurality of heat radiating members 27 to the fixing member 50.
　３．２　切断ステップ（Ｓ１２０）
　切断ステップは、放熱構造体シート６０を、所定数の放熱部材２７を含むように長さ方向（図７のＹ方向）に沿って切断するステップである（図７Ｂおよび図７Ｃ参照）。切断ステップは、より具体的には、放熱構造体シート６０を、長さ方向に沿って（例えば、図７Ｂの破線に沿って）所定間隔で切断するステップである。この切断ステップにより、放熱構造体シート６０から１以上の放熱構造体２５が形成される（図７Ｃ参照）。この切断ステップにおいて、放熱構造体シート６０は、複数の放熱部材２７を含むように切断されれば、放熱部材２７の長さ方向に直交する方向（図７ＢのＸ方向）に切断される間隔に制約はないが、５００～７００ｍｍごとに切断されることが好ましく、６００ｍｍごとに切断されることがより好ましい。なお、切断ステップにおいて、放熱構造体シート６０は、放熱部材２７の長さ方向に平行に切断されることに限定されない。 3.2 Cutting step (S120)
The cutting step is a step of cutting the heat radiating structure sheet 60 along the length direction (Y direction in FIG. 7) so as to include a predetermined number of heat radiating members 27 (see FIGS. 7B and 7C). More specifically, the cutting step is a step of cutting the heat radiating structure sheet 60 at predetermined intervals along the length direction (for example, along the broken line in FIG. 7B). By this cutting step, one or more heat radiating structures 25 are formed from the heat radiating structure sheet 60 (see FIG. 7C). In this cutting step, if the heat radiating structure sheet 60 is cut so as to include the plurality of heat radiating members 27, the heat radiating structure sheet 60 is cut at intervals perpendicular to the length direction of the heat radiating member 27 (X direction in FIG. 7B). Although there are no restrictions, it is preferably cut every 500 to 700 mm, and more preferably every 600 mm. In the cutting step, the heat radiating structure sheet 60 is not limited to being cut in parallel with the length direction of the heat radiating member 27.
　このように、放熱構造体２５は、固定部材５０により連結されるため、バッテリーセル２０で圧縮された状態においてはバッテリーセル２０の表面に追従して放熱部材２７が上下左右方向に潰れ、かつ、バッテリーセル２０を除いた状態においては放熱部材２７の弾性力により元の形状に戻ることができる。また、放熱構造体２５は、固定部材５０により位置決めされるため、各バッテリーセル２０に放熱部材２７を確実に接触するようにできる。このため、放熱構造体２５は、例えば、自動車の振動等により放熱部材２７が偏在する事態を抑制でき、かつ多数のバッテリーセル２０各々における放熱性の均一化を高めることができる。また、放熱構造体２５は、各放熱部材２７がクッション部材３１の外側面に熱伝導シート３０をスパイラル状に巻いた構造を有しているため、クッション部材３１の変形を過度に拘束しない。 In this way, since the heat radiating structure 25 is connected by the fixing member 50, in the state of being compressed by the battery cell 20, the heat radiating member 27 follows the surface of the battery cell 20 and is crushed in the vertical and horizontal directions, and When the battery cell 20 is removed, the original shape can be restored by the elastic force of the heat radiating member 27. Further, since the heat radiating structure 25 is positioned by the fixing member 50, the heat radiating member 27 can be surely brought into contact with each battery cell 20. Therefore, the heat radiating structure 25 can suppress a situation in which the heat radiating members 27 are unevenly distributed due to, for example, vibration of an automobile, and can improve the uniformity of heat radiating properties in each of a large number of battery cells 20. Further, since each heat radiating member 27 has a structure in which the heat conductive sheet 30 is spirally wound around the outer surface of the cushion member 31, the heat radiating structure 25 does not excessively restrain the deformation of the cushion member 31.
　また、放熱構造体２５は複数の放熱部材２７が固定部材５０に固定されるため、バッテリー１に放熱構造体２５を取り付ける際に、作業者は、複数の放熱部材２７をバッテリーセル２０と筐体１１の底部１２との間に並べる作業を行うことなく、固定部材５０を持って放熱構造体２５をバッテリー１に取り付けることができ、作業性が向上する。また、固定部材５０は、複数の凹部５２を有しているため、放熱部材２７を凹部５２に載置することにより、複数の放熱部材２７をその長さ方向と直交する方向（図７ＡのＸ方向）に容易に整列させることができる。よって、このように整列された複数の放熱部材２７の長さ方向の両端部２８，２８を固定部材５０の凹部５２に固定することにより放熱構造体シート６０を容易に製造することができる。また、放熱構造体２５は、このように製造された放熱構造体シート６０を、放熱部材２７の長さ方向に沿って切断することにより製造される。すなわち、このように複雑な工程を用いずに製造可能な放熱構造体シート６０を、放熱部材２７の長さ方向に沿って所定間隔で切断するだけで、複数の放熱構造体２５の製造が可能となり、放熱構造体２５の生産性を高めることができる。 Further, since a plurality of heat radiating members 27 are fixed to the fixing member 50 in the heat radiating structure 25, when the heat radiating structure 25 is attached to the battery 1, the operator attaches the plurality of heat radiating members 27 to the battery cell 20 and the housing. The heat radiating structure 25 can be attached to the battery 1 by holding the fixing member 50 without performing the work of arranging the heat dissipation structure 25 with the bottom portion 12 of 11, and the workability is improved. Further, since the fixing member 50 has a plurality of recesses 52, by placing the heat radiating member 27 in the recesses 52, the plurality of heat radiating members 27 are arranged in a direction orthogonal to the length direction thereof (X in FIG. 7A). It can be easily aligned in the direction). Therefore, the heat radiating structure sheet 60 can be easily manufactured by fixing both ends 28, 28 of the plurality of heat radiating members 27 arranged in this way in the length direction to the recesses 52 of the fixing member 50. Further, the heat radiating structure 25 is manufactured by cutting the heat radiating structure sheet 60 manufactured in this way along the length direction of the heat radiating member 27. That is, a plurality of heat radiating structures 25 can be manufactured only by cutting the heat radiating structure sheet 60 that can be manufactured without using such a complicated process at predetermined intervals along the length direction of the heat radiating member 27. Therefore, the productivity of the heat radiating structure 25 can be increased.
（第２実施形態）
　次に、第２実施形態に係る放熱構造体シート、放熱構造体および当該放熱構造体を備えるバッテリーについて説明する。第１実施形態と共通する部分については同じ符号を付して重複した説明を省略する。 (Second Embodiment)
Next, the heat radiating structure sheet, the heat radiating structure, and the battery including the heat radiating structure according to the second embodiment will be described. The same reference numerals are given to the parts common to the first embodiment, and duplicate description will be omitted.
　図８は、第２実施形態に係る放熱構造体シートの平面図を示す。図９Ａは、第２実施形態に係る放熱構造体の平面図、図９Ｂは、図９ＡにおけるＨ－Ｈ線断面図、および図９Ｃは、図９Ｂ中の領域Ｉの拡大図をそれぞれ示す。 FIG. 8 shows a plan view of the heat radiating structure sheet according to the second embodiment. 9A is a plan view of the heat radiating structure according to the second embodiment, FIG. 9B is a sectional view taken along line HH in FIG. 9A, and FIG. 9C is an enlarged view of a region I in FIG. 9B.
　第２実施形態に係る放熱構造体シート６０ａおよび放熱構造体２５ａは、第１実施形態に係る放熱構造体シート６０および放熱構造体２５と異なり、第１実施形態の固定部材５０に代えて、固定部材５０ａを備える。固定部材５０ａ以外の構成については、第１実施形態と共通するので、説明を省略する。 The heat radiating structure sheet 60a and the heat radiating structure 25a according to the second embodiment are fixed in place of the fixing member 50 of the first embodiment, unlike the heat radiating structure sheet 60 and the heat radiating structure 25 according to the first embodiment. A member 50a is provided. The configurations other than the fixing member 50a are the same as those in the first embodiment, and thus the description thereof will be omitted.
　固定部材５０ａは、複数の放熱部材２７をその長さ方向（図８のＹ方向）の両端部２８，２８を載置して固定するとともに、両端部２８，２８以外の中間部２９を非接触となるシート状の部材である。固定部材５０ａは、複数の放熱部材２７を載置可能な矩形状のシート５１ａと、放熱部材２７の長さ方向に直交する方向（図８のＸ方向）に並んだ複数の空間５５ａと、を備える。また、固定部材５０ａは、第１実施形態に係る固定部材５０と異なり、凹部５２を備えていない。空間５５ａは、熱源の一例であるバッテリーセル２０によって放熱部材２７を底部１２に向けて押圧可能な領域である。空間５５ａは、バッテリーセル２０を挿通可能なほどに十分な大きさを有しているのが好ましい。空間５５ａは、より好ましくは、シート５１ａのうち、放熱部材２７の中間部２９が載置される位置に設けられている。このように空間５５ａを設けることにより、固定部材５０ａは、放熱部材２７の中間部２９が非接触状態となるように構成される。また、空間５５ａは、より好ましくは、放熱部材２７の中間部２９の長さと同等の長さで構成される。また、空間５５ａは、その幅Ｗ４を、放熱構造体２７の円換算直径Ｄより大きく形成されることが好ましく、０．１１４Ｄとして形成されることがより好ましい（図９Ｃ参照）。空間５５ａの幅Ｗ４を、放熱部材２７の円換算直径Ｄの１１．４％以上にすれば、放熱部材２７が円換算直径Ｄの８０％の厚さに圧縮されて変形する際に、放熱部材２７がシート５１ａに接触して、当該変形の障害となることを防止できるためである。しかし、空間５５ａは、バッテリーセル２０を挿通不可な大きさであっても良い。また、空間５５ａは、シート５１ａ上に複数設けられず、例えば、複数の放熱部材２７の中間部２９が非接触となるような１つの空間であっても良い。 In the fixing member 50a, a plurality of heat radiating members 27 are placed and fixed at both ends 28, 28 in the length direction (Y direction in FIG. 8), and the intermediate portions 29 other than the both end portions 28, 28 are non-contacted. It is a sheet-like member. The fixing member 50a includes a rectangular sheet 51a on which a plurality of heat radiating members 27 can be placed, and a plurality of spaces 55a arranged in a direction orthogonal to the length direction of the heat radiating member 27 (X direction in FIG. 8). Be prepared. Further, unlike the fixing member 50 according to the first embodiment, the fixing member 50a does not have a recess 52. The space 55a is a region where the heat radiating member 27 can be pressed toward the bottom 12 by the battery cell 20 which is an example of the heat source. The space 55a is preferably large enough to allow the battery cell 20 to be inserted. The space 55a is more preferably provided at a position in the sheet 51a where the intermediate portion 29 of the heat radiating member 27 is placed. By providing the space 55a in this way, the fixing member 50a is configured so that the intermediate portion 29 of the heat radiating member 27 is in a non-contact state. Further, the space 55a is more preferably configured to have a length equivalent to the length of the intermediate portion 29 of the heat radiating member 27. Further, the width W4 of the space 55a is preferably formed larger than the circle-equivalent diameter D of the heat radiating structure 27, and more preferably 0.114D (see FIG. 9C). If the width W4 of the space 55a is set to 11.4% or more of the circle-equivalent diameter D of the heat-dissipating member 27, the heat-dissipating member 27 is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed. This is because it is possible to prevent the 27 from coming into contact with the sheet 51a and hindering the deformation. However, the space 55a may have a size that does not allow the battery cell 20 to be inserted. Further, a plurality of spaces 55a may not be provided on the sheet 51a, and may be, for example, one space in which the intermediate portions 29 of the plurality of heat radiating members 27 are not in contact with each other.
　放熱構造体２５ａは、放熱部材２７の中間部２９が空間５５ａの位置に配置されるように、複数の放熱部材２７を固定部材５０ａに載置し、放熱部材２７の両端部２８，２８をシート５１ａに固定している。固定部材５０ａを形成する材料は、第１実施形態の固定部材５０と同様のため、説明を省略する。なお、複数の放熱部材２７の両端部２８，２８をシート５１ａに固定する方法は、例えば、接着剤で固定する等、バッテリーセル２０からの放熱による温度上昇に耐え得る固定方法であれば、特に制約されない。また、固定部材５０ａは、第１実施形態と同様に、凹部５２を備えていても良い。この場合、放熱構造体２５ａは、第１実施形態と同様に、放熱部材２７の両端部２８，２８を、接着剤５４を介して凹部５２に固定可能である。 In the heat radiating structure 25a, a plurality of heat radiating members 27 are placed on the fixing member 50a so that the intermediate portion 29 of the heat radiating member 27 is arranged at the position of the space 55a, and both end portions 28 and 28 of the heat radiating member 27 are seated. It is fixed to 51a. Since the material for forming the fixing member 50a is the same as that of the fixing member 50 of the first embodiment, the description thereof will be omitted. The method of fixing both ends 28, 28 of the plurality of heat radiating members 27 to the sheet 51a is particularly long as it is a fixing method capable of withstanding the temperature rise due to heat radiating from the battery cell 20, such as fixing with an adhesive. Not constrained. Further, the fixing member 50a may be provided with the recess 52 as in the first embodiment. In this case, the heat radiating structure 25a can fix the heat radiating member 27 at both ends 28, 28 to the recess 52 via the adhesive 54, as in the first embodiment.
　また、固定部材５０ａは、中間部２９がバッテリーセル２０からの押圧により空間５５ａから固定部材５０ａの外面５６ａと面一若しくは外面５６ａから突出可能な厚さを有することが好ましい（図９Ｃ参照）。より具体的には、固定部材５０ａは、その厚さＴ１が、バッテリーセル２０からの押圧により変形した放熱部材２７の中間部２９の厚さ（０．８Ｄ）と同一若しくは当該中間部２９の厚さより薄くなるよう形成されることが好ましい。 Further, the fixing member 50a preferably has a thickness such that the intermediate portion 29 can project from the space 55a to the outer surface 56a of the fixing member 50a or from the outer surface 56a by pressing from the battery cell 20 (see FIG. 9C). More specifically, the thickness T1 of the fixing member 50a is the same as the thickness (0.8D) of the intermediate portion 29 of the heat radiating member 27 deformed by the pressure from the battery cell 20, or the thickness of the intermediate portion 29. It is preferably formed to be thinner than the halfbeak.
　このように放熱構造体２５ａを構成することにより、バッテリーセル２０からの押圧により放熱部材２７が上下方向に圧縮されても、バッテリーセル２０が固定部材５０ａに接触してそれ以上に潰れなくなる虞を抑制でき、放熱部材２７が円換算直径Ｄの８０％の厚さに圧縮されて変形する際に、当該変形の障害となることを防止できる。なお、放熱部材２７の長さ方向両端部２８，２８は固定部材５０ａの上に載って固定されているので、当該両端部２８，２８は、筐体１１の底部１２に接触しない。しかし、放熱部材２７の中間部２９は、底部１２に接するので、十分な放熱効果を得ることができる。また、放熱部材２７の底部１２側の面は、固定部材５０ａの底部１２側の面と同じ高さか、若しくは底部１２側に若干突出させているのが好ましい。固定部材５０を底部１２に接触させやすいからである。 By constructing the heat radiating structure 25a in this way, even if the heat radiating member 27 is compressed in the vertical direction by pressing from the battery cell 20, there is a risk that the battery cell 20 will come into contact with the fixing member 50a and will not be further crushed. It can be suppressed, and when the heat radiating member 27 is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed, it can be prevented from becoming an obstacle to the deformation. Since both ends 28, 28 of the heat radiating member 27 in the length direction are placed and fixed on the fixing member 50a, the both ends 28, 28 do not come into contact with the bottom 12 of the housing 11. However, since the intermediate portion 29 of the heat radiating member 27 is in contact with the bottom portion 12, a sufficient heat radiating effect can be obtained. Further, it is preferable that the surface of the heat radiating member 27 on the bottom 12 side is at the same height as the surface of the fixing member 50a on the bottom 12 side, or slightly protrudes toward the bottom 12. This is because the fixing member 50 is easily brought into contact with the bottom portion 12.
　放熱構造体２５ａは、放熱構造体シート６０ａ（図８参照）を、所定数の放熱部材２７を含むように放熱部材２７の長さ方向（図８のＹ方向）に沿って切断することにより形成される構造体である。放熱部材２７は、第１実施形態と同様の製造方法（図５Ａ～図５Ｃ参照）により製造される。固定部材５０ａは、複数の空間５５ａを有するシート成形用の金型を用意し、ＰＥＴに代表される樹脂製のシートを当該金型に挟持させてプレス成形することにより製造される。また、放熱構造体２５ａの製造方法は、第１実施形態と同様に、固定ステップ（Ｓ１１０）および切断ステップ（Ｓ１２０）を含む。固定ステップは、固定部材５０ａのシート５１ａのうち放熱部材２７の両端部２８，２８が載置される位置（すなわち、放熱部材２７の長さ方向（図８のＹ方向）における空間５５ａの外側）に、接着剤５４を塗布した状態で、放熱部材２７の両端部２８，２８を載置することにより固定するステップである。なお、固定ステップでは、放熱部材２７の両端部２８，２８に接着剤を塗布して、シート５１ａに載置することにより固定しても良い。この固定ステップにより、複数の放熱部材２７の長さ方向の両端部２８，２８が固定部材５０ａに固定され、且つ、中間部２９が空間５５ａにより浮遊されて非接触状態となった放熱構造体シート６０ａが形成される。放熱構造体シート６０ａは、固定部材５０ａに複数の放熱部材２７を固定することにより、複数の放熱部材２７が位置決めされる。切断ステップは、第１実施形態と同様に、放熱構造体シート６０ａを、放熱部材２７の長さ方向に沿って（例えば、図８の破線に沿って）所定間隔で切断するステップである。切断ステップは、第１実施形態と同様であるため、詳細な説明を省略する。この切断ステップにより、放熱構造体シート６０ａから１以上の放熱構造体２５ａ（図９Ａ参照）が形成される。 The heat radiating structure 25a is formed by cutting the heat radiating structure sheet 60a (see FIG. 8) along the length direction of the heat radiating member 27 (Y direction in FIG. 8) so as to include a predetermined number of heat radiating members 27. It is a structure to be used. The heat radiating member 27 is manufactured by the same manufacturing method as in the first embodiment (see FIGS. 5A to 5C). The fixing member 50a is manufactured by preparing a sheet molding die having a plurality of spaces 55a, sandwiching a resin sheet typified by PET in the die, and press molding. Further, the method for manufacturing the heat radiating structure 25a includes a fixing step (S110) and a cutting step (S120) as in the first embodiment. The fixing step is a position on the sheet 51a of the fixing member 50a on which both ends 28, 28 of the heat radiating member 27 are placed (that is, outside the space 55a in the length direction of the heat radiating member 27 (Y direction in FIG. 8)). This is a step of fixing the heat radiating member 27 by placing both ends 28, 28 in a state where the adhesive 54 is applied. In the fixing step, the heat radiating member 27 may be fixed by applying an adhesive to both ends 28, 28 and placing the heat radiating member 27 on the sheet 51a. By this fixing step, both end portions 28, 28 of the plurality of heat radiating members 27 in the length direction are fixed to the fixing member 50a, and the intermediate portion 29 is suspended by the space 55a to be in a non-contact state. 60a is formed. In the heat radiating structure sheet 60a, the plurality of heat radiating members 27 are positioned by fixing the plurality of heat radiating members 27 to the fixing member 50a. The cutting step is a step of cutting the heat radiating structure sheet 60a along the length direction of the heat radiating member 27 (for example, along the broken line in FIG. 8) at predetermined intervals, as in the first embodiment. Since the cutting step is the same as that of the first embodiment, detailed description thereof will be omitted. By this cutting step, one or more heat radiating structures 25a (see FIG. 9A) are formed from the heat radiating structure sheet 60a.
　このように形成された放熱構造体シート６０ａおよび放熱構造体２５ａも、また、上述の放熱構造体シート６０および放熱構造体２５と同様の作用効果を奏する。また、放熱構造体２５ａは、複数の放熱部材２７を固定部材５０ａに固定した構造を有する。このため、バッテリー１に放熱構造体２５ａを取り付ける際に、作業者は、複数の放熱部材２７をバッテリーセル２０と筐体１１の底部１２との間に並べる作業を行うことなく、固定部材５０ａを持って放熱構造体２５ａをバッテリー１に取り付けることができ、作業性が向上する。特に、固定部材５０ａは、放熱部材２７がシート５１ａにより四方から囲まれた枠形状を有する。このため、放熱構造体２５ａをバッテリー１に取り付ける作業は、より容易になる。また、固定部材５０ａは、複数の空間５５ａを有しているため、放熱部材２７を空間５５ａに載置することにより、複数の放熱部材２７をその長さ方向と直交する方向に容易に整列させることができる。よって、このように整列された複数の放熱部材２７の長さ方向の両端部２８，２８を固定部材５０ａに固定することにより、放熱構造体シート６０ａを容易に製造することができる。また、放熱構造体２５ａは、放熱部材２７の長さ方向に沿って、放熱構造体シート６０ａを切断することにより製造される。すなわち、放熱構造体シート６０ａを、放熱部材２７の長さ方向に沿って所定間隔で切断するだけで、複数の放熱構造体２５ａの製造が可能となる。この結果、放熱構造体２５ａの生産性をより高めることができる。 The heat radiating structure sheet 60a and the heat radiating structure 25a thus formed also have the same effects as the heat radiating structure sheet 60 and the heat radiating structure 25 described above. Further, the heat radiating structure 25a has a structure in which a plurality of heat radiating members 27 are fixed to the fixing member 50a. Therefore, when attaching the heat radiating structure 25a to the battery 1, the operator does not have to arrange the plurality of heat radiating members 27 between the battery cell 20 and the bottom portion 12 of the housing 11, and the fixing member 50a is attached. The heat radiating structure 25a can be attached to the battery 1 by holding it, and workability is improved. In particular, the fixing member 50a has a frame shape in which the heat radiating member 27 is surrounded by the sheet 51a from all sides. Therefore, the work of attaching the heat radiating structure 25a to the battery 1 becomes easier. Further, since the fixing member 50a has a plurality of spaces 55a, by placing the heat radiating member 27 in the space 55a, the plurality of heat radiating members 27 can be easily aligned in the direction orthogonal to the length direction thereof. be able to. Therefore, the heat radiating structure sheet 60a can be easily manufactured by fixing both ends 28, 28 of the plurality of heat radiating members 27 arranged in this way in the length direction to the fixing member 50a. Further, the heat radiating structure 25a is manufactured by cutting the heat radiating structure sheet 60a along the length direction of the heat radiating member 27. That is, a plurality of heat radiating structures 25a can be manufactured only by cutting the heat radiating structure sheet 60a at predetermined intervals along the length direction of the heat radiating member 27. As a result, the productivity of the heat radiating structure 25a can be further increased.
（各実施形態の作用・効果）
　以上説明したように、放熱構造体シート６０，６０ａ（放熱構造体シートを総称する場合には、「放熱構造体シート６０等」とも称する。）は、バッテリーセル２０からの放熱を高める複数の放熱部材２７と、放熱部材２７を固定する固定部材５０，５０ａと、を備え、放熱部材２７は、バッテリーセル２０からの熱を伝えるためのスパイラル状に巻回しながら進行する形状の熱伝導シート３０と、熱伝導シート３０の環状裏面に備えられ、熱伝導シート３０の巻回しながら進行する方向に貫通する貫通路３２を有し、熱伝導シート３０に比べてバッテリーセル２０の表面形状に合わせて変形容易な筒状のクッション部材３１と、を備え、固定部材５０，５０ａは、複数の放熱部材２７をその長さ方向の両端部２８，２８を載置して固定するとともに、両端部２８，２８以外の中間部２９が非接触となるシート状の部材である。 (Action / effect of each embodiment)
As described above, the heat radiating structure sheets 60, 60a (also referred to as "heat radiating structure sheet 60, etc." when the heat radiating structure sheets are generically referred to) are a plurality of heat radiating agents that enhance heat radiating from the battery cell 20. A heat conductive sheet 30 is provided with a member 27 and fixing members 50, 50a for fixing the heat radiating member 27, and the heat radiating member 27 is spirally wound to transfer heat from the battery cell 20. , It is provided on the annular back surface of the heat conductive sheet 30, has a through path 32 that penetrates in the direction of traveling while winding the heat conductive sheet 30, and is deformed according to the surface shape of the battery cell 20 as compared with the heat conductive sheet 30. A simple tubular cushion member 31 is provided, and the fixing members 50, 50a mount and fix a plurality of heat radiating members 27 at both ends 28, 28 in the length direction thereof, and both ends 28, 28. It is a sheet-like member in which the intermediate portion 29 other than the above is non-contact.
　放熱構造体シート６０等をこのように構成することによって、バッテリーセル２０の種々の形態に順応可能であって、弾性変形性に富み、放熱効率に優れた放熱構造体シート６０等を提供することができる。また、放熱構造体シート６０等は、貫通路３２に起因してより軽量になる。また、このような放熱構造体シート６０等を、所定数の放熱部材２７を含むように放熱部材２７の長さ方向に沿って切断することにより、放熱構造体２５，２５ａ（放熱構造体を総称する場合には、「放熱構造体２５等」とも称する。）を容易に製造することができ、放熱構造体２５等の生産性をより高めることができる。 By configuring the heat radiating structure sheet 60 or the like in this way, it is possible to provide the heat radiating structure sheet 60 or the like which is adaptable to various forms of the battery cell 20, is highly elastically deformable, and has excellent heat radiating efficiency. Can be done. Further, the heat radiating structure sheet 60 and the like are lighter due to the through-passage 32. Further, by cutting such a heat radiating structure sheet 60 or the like along the length direction of the heat radiating member 27 so as to include a predetermined number of heat radiating members 27, the heat radiating structures 25, 25a (general term for the heat radiating structure). In this case, the heat radiating structure 25 and the like can be easily manufactured), and the productivity of the heat radiating structure 25 and the like can be further improved.
　また、放熱構造体シート６０を構成する固定部材５０は、複数の放熱部材２７の長さ方向の両端部２８，２８の少なくとも一端部を収容する凹部５２を有するため、放熱部材２７を固定部材５０に容易に固定することができる。よって、このように構成された放熱構造体シート６０から形成される放熱構造体２５は、バッテリーセル２０で圧縮された状態においてはバッテリーセル２０の表面に追従して放熱部材２７が上下左右方向に潰れ、かつ、バッテリーセル２０を除いた状態においては放熱部材２７の弾性力により元の形状に戻ることができる。また、放熱構造体２５は、固定部材５０により放熱部材２７が位置決めされるため、各バッテリーセル２０に放熱部材２７を確実に接触するようにできる。また、固定部材５０が凹部５２を有するため、放熱部材２７を凹部５２に載置することにより、複数の放熱部材２７をその長さ方向と直交する方向に容易に整列させることができ、放熱構造体シート６０の製造がより容易となる。よって、放熱構造体シート６０を、放熱部材２７の長さ方向に沿って切断するだけで、放熱構造体２５の製造が可能となり、放熱構造体２５の生産性をより高めることができる。 Further, since the fixing member 50 constituting the heat radiating structure sheet 60 has recesses 52 for accommodating at least one end of both end portions 28, 28 in the length direction of the plurality of heat radiating members 27, the heat radiating member 27 is fixed to the fixing member 50. Can be easily fixed to. Therefore, in the heat radiating structure 25 formed from the heat radiating structure sheet 60 configured in this way, the heat radiating member 27 follows the surface of the battery cell 20 in the vertical and horizontal directions in the state of being compressed by the battery cell 20. When it is crushed and the battery cell 20 is removed, it can return to its original shape due to the elastic force of the heat radiating member 27. Further, in the heat radiating structure 25, since the heat radiating member 27 is positioned by the fixing member 50, the heat radiating member 27 can be surely brought into contact with each battery cell 20. Further, since the fixing member 50 has the recess 52, by placing the heat radiating member 27 in the recess 52, a plurality of heat radiating members 27 can be easily aligned in the direction orthogonal to the length direction thereof, and the heat radiating structure can be obtained. Manufacture of the body sheet 60 becomes easier. Therefore, the heat radiating structure 25 can be manufactured only by cutting the heat radiating structure sheet 60 along the length direction of the heat radiating member 27, and the productivity of the heat radiating structure 25 can be further improved.
　また、放熱構造体シート６０等を構成する固定部材５０，５０ａは、中間部２９がバッテリーセル２０からの押圧により固定部材５０，５０ａの外面５６，５６ａと面一若しくは当該外面５６，５６ａから突出可能な厚さＴ，Ｔ１を有する。このため、放熱構造体シート６０等から形成される放熱構造体２５等は、バッテリーセル２０からの押圧により放熱部材２７が上下方向に圧縮されても、中間部２９を筐体１１の底部１２に確実に接触させることができる。 Further, in the fixing members 50 and 50a constituting the heat radiating structure sheet 60 and the like, the intermediate portion 29 is flush with the outer surfaces 56 and 56a of the fixing members 50 and 50a or protrudes from the outer surfaces 56 and 56a by pressing from the battery cell 20. It has possible thicknesses T, T1. Therefore, in the heat radiating structure 25 or the like formed from the heat radiating structure sheet 60 or the like, even if the heat radiating member 27 is compressed in the vertical direction by the pressing from the battery cell 20, the intermediate portion 29 is placed on the bottom portion 12 of the housing 11. It can be reliably contacted.
　また、放熱構造体シート６０等を構成する放熱部材２７は、固定部材５０，５０ａに接着剤５４で接着されているため、複数の放熱部材２７を固定部材５０，５０ａにより確実に固定且つ位置決めすることができる。よって、放熱構造体シート６０等から形成される放熱構造体２５等は、各バッテリーセル２０に放熱部材２７を確実に接触するようにできる。 Further, since the heat radiating member 27 constituting the heat radiating structure sheet 60 and the like is adhered to the fixing members 50 and 50a with the adhesive 54, the plurality of heat radiating members 27 are securely fixed and positioned by the fixing members 50 and 50a. be able to. Therefore, the heat radiating structure 25 or the like formed from the heat radiating structure sheet 60 or the like can ensure that the heat radiating member 27 is in contact with each battery cell 20.
　また、放熱構造体シート６０等を構成する熱伝導シート３０は、その表面に、バッテリーセル２０から当該表面への熱伝導性を高めるための熱伝導性オイルを有する。熱伝導シート３０は、微視的に、隙間（孔あるいは凹部）を有する。通常、当該隙間には空気が存在し、熱伝導性に悪影響を及ぼす可能性が有る。熱伝導性オイルは、その隙間を埋めて、空気に代わって存在することになり、熱伝導シート３０の熱伝導性を向上させる機能を有する。 Further, the heat conductive sheet 30 constituting the heat radiating structure sheet 60 and the like has a heat conductive oil on its surface for increasing the heat conductivity from the battery cell 20 to the surface. The heat conductive sheet 30 has a gap (hole or recess) microscopically. Normally, air is present in the gap, which may adversely affect the thermal conductivity. The heat conductive oil fills the gap and exists in place of air, and has a function of improving the heat conductivity of the heat conductive sheet 30.
　また、熱伝導性オイルは、シリコーンオイルと、シリコーンオイルより熱伝導性が高く、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とを含む。シリコーンオイルは、耐熱性、耐寒性、粘度安定性、熱伝導性に優れたオイルであるため、熱伝導シート３０の表面に塗布して、バッテリーセル２０と熱伝導シート３０との間に介在させる熱伝導性オイルとして特に好適である。また、熱伝導性オイルは、熱伝導性フィラーを含むため、熱伝導シート３０の熱伝導性を高めることができる。 Further, the thermally conductive oil contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and consisting of one or more of metal, ceramics or carbon. Since the silicone oil is an oil having excellent heat resistance, cold resistance, viscosity stability, and thermal conductivity, it is applied to the surface of the thermal conductive sheet 30 and interposed between the battery cell 20 and the thermal conductive sheet 30. It is particularly suitable as a thermally conductive oil. Further, since the heat conductive oil contains a heat conductive filler, the heat conductivity of the heat conductive sheet 30 can be enhanced.
　また、放熱構造体２５等の製造方法は、上述の放熱構造体シート６０等から当該シート６０等より短い放熱構造体２５等を製造する方法であって、複数の放熱部材２７の長さ方向の両端部２８，２８を固定部材５０，５０ａに載置して固定する固定ステップ（Ｓ１１０）と、放熱部材２７の長さ方向の両端部２８，２８が固定部材５０，５０ａに固定された放熱構造体シート６０等を、所定数の放熱部材２７を含むように長さ方向に沿って切断する切断ステップ（Ｓ１２０）と、を含む。このような製造方法を用いて放熱構造体２５等を製造することにより、放熱構造体シート６０等から放熱構造体２５等を容易に形成することができ、放熱構造体２５等の生産性をより高めることができる。また、このような製造方法を用いることにより、バッテリーセル２０の種々の形態に順応可能であって、弾性変形性に富み、放熱効率に優れた放熱構造体２５等を製造することができる。 Further, the method of manufacturing the heat radiating structure 25 or the like is a method of manufacturing the heat radiating structure 25 or the like shorter than the sheet 60 or the like from the above-mentioned heat radiating structure sheet 60 or the like, in the length direction of the plurality of heat radiating members 27. A fixing step (S110) in which both ends 28, 28 are placed and fixed on the fixing members 50, 50a, and a heat radiating structure in which both ends 28, 28 in the length direction of the heat radiating member 27 are fixed to the fixing members 50, 50a. A cutting step (S120) of cutting the body sheet 60 and the like along the length direction so as to include a predetermined number of heat radiating members 27 is included. By manufacturing the heat radiating structure 25 or the like by using such a manufacturing method, the heat radiating structure 25 or the like can be easily formed from the heat radiating structure sheet 60 or the like, and the productivity of the heat radiating structure 25 or the like can be further improved. Can be enhanced. Further, by using such a manufacturing method, it is possible to manufacture a heat radiating structure 25 or the like which is adaptable to various forms of the battery cell 20, is highly elastically deformable, and has excellent heat radiating efficiency.
（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。 (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 implemented in various modifications.
　図１０は、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. 10 shows a cross-sectional view when the battery cell is laid horizontally so as to be in contact with the side surface of the battery cell on the heat radiating structure, a partially enlarged view thereof, and a partial cross-sectional view when the battery cell expands during charging and discharging. Each is shown.
　先述の各実施形態では、バッテリーセル２０を縦にしてその下端に放熱構造体２５等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２０の配置形態は、これに限定されない。図１０に示すように、バッテリーセル２０の側面を放熱構造体２５等の各放熱部材２７に接触させるように、バッテリーセル２０を配置しても良い。バッテリーセル２０は、充電および放電の際に温度上昇する。バッテリーセル２０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２０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１０に示すように、放熱構造体２５等の構成している各放熱部材２７がバッテリーセル２０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。 In each of the above-described embodiments, the situation in which the battery cell 20 is vertically arranged and the heat radiating structure 25 or the like is brought into contact with the lower end thereof has been described, but the arrangement form of the battery cell 20 is not limited to this. As shown in FIG. 10, the battery cell 20 may be arranged so that the side surface of the battery cell 20 is in contact with each heat radiating member 27 such as the heat radiating structure 25. The temperature of the battery cell 20 rises during charging and discharging. If the container itself of the battery cell 20 is made of a highly flexible material, the side surface of the battery cell 20 may bulge in particular. Even in such a case, as shown in FIG. 10, since each heat radiating member 27 constituting the heat radiating structure 25 or the like can be deformed according to the shape of the outer surface of the battery cell 20, the heat radiating property is high even during charging and discharging. Can be maintained.
　例えば、熱源は、バッテリーセル２０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、冷却部材１５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。また、放熱構造体２５等は、バッテリー１等以外の構造物、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。 For example, the heat source includes not only the battery cell 20, 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 member 15 may be not only cooling water but also an organic solvent, liquid nitrogen, or a cooling gas. Further, the heat radiating structure 25 and the like may be arranged in a structure other than the battery 1 and the like, for example, an electronic device, a home appliance, a power generation device and the like.
　また、本発明の「放熱構造体シート」は、放熱構造体２５等の中間体或いは半製品である放熱構造体シート６０等のみならず、放熱構造体２５等も含むように広義に解釈される。 Further, the "heat-dissipating structure sheet" of the present invention is broadly interpreted to include not only an intermediate such as the heat-dissipating structure 25 or the heat-dissipating structure sheet 60 or the like, which is a semi-finished product, but also the heat-dissipating structure 25 or the like. ..
　また、固定部材５０は、２つのシート５１，５１の両方に凹部５２を備えることに限定されず、２つのシート５１，５１のうち一方のシート５１にのみ凹部５２を備えていても良いし、いずれのシート５１，５１にも凹部５２を備えなくても良い。この場合、放熱部材２７は、例えば、接着剤５４等により、凹部５２を備えていないシート５１に固定すれば良い。熱伝導シート３０は、スパイラル形状ではなく、クッション部材３１の外表面を覆う筒形状の部材でも良い。 Further, the fixing member 50 is not limited to having the recess 52 in both of the two sheets 51 and 51, and the recess 52 may be provided in only one of the two sheets 51 and 51. Neither sheet 51, 51 may be provided with the recess 52. In this case, the heat radiating member 27 may be fixed to the sheet 51 having no recess 52 by, for example, an adhesive 54 or the like. The heat conductive sheet 30 may be a tubular member that covers the outer surface of the cushion member 31 instead of the spiral shape.
　また、放熱部材２７は、固定部材５０の凹部５２に接着剤で固定されることに限定されず、例えば、嵌め込み等の手法で凹部５２に固定されていても良い。 Further, the heat radiating member 27 is not limited to being fixed to the recess 52 of the fixing member 50 with an adhesive, and may be fixed to the recess 52 by, for example, a method such as fitting.
　また、放熱構造体シート６０は、１つの放熱部材２７の端部２８を１つの凹部５２に収容して固定していたが、本発明はこれに限定されない。例えば、固定部材５０は、複数の放熱部材２７を収容可能な大きさの凹部５２を備え、複数の放熱部材の端部２８をまとめて１つの凹部５２に収容して固定しても良い。この場合、放熱構造体シート６０は、複数の放熱部材２７を固定部材５０に位置決めするため、上述の実施形態と同様に、接着剤５４を介して複数の放熱部材２７を凹部５２に固定することが好ましい。 Further, the heat radiating structure sheet 60 accommodates and fixes the end 28 of one heat radiating member 27 in one recess 52, but the present invention is not limited to this. For example, the fixing member 50 may include a recess 52 having a size capable of accommodating a plurality of heat radiating members 27, and the end portions 28 of the plurality of heat radiating members may be collectively accommodated and fixed in one recess 52. In this case, in the heat radiating structure sheet 60, since the plurality of heat radiating members 27 are positioned on the fixing members 50, the plurality of heat radiating members 27 are fixed to the recesses 52 via the adhesive 54 as in the above-described embodiment. Is preferable.
　また、固定部材５０は、その形状に特に制約はなく、複数の放熱部材２７をその長さ方向の両端部２８，２８を載置して固定するとともに、中間部２９が非接触となる形状であれば良い。固定部材５０を形成するシート５１は、平面視にて長方形の部材に限定されず、例えば、平行四辺形、楕円、多角形等の長辺部材であっても良い。また、シート５１は、その長辺および／または短辺が直線で形成されることに限定されず、例えば、ジグザグ線等、長辺および／または短辺が凹凸を有していても良い。また、固定部材５０は、２つのシート５１，５１で形成されていたが、内側に空間５５を有する１つの枠形状の部材で形成されていても良い。また、固定部材５０ａを形成するシート５１ａは、平面視にてスリットを有する四角い枠形状の部材ではなく、楕円、円、多角形等の外形であってその内側にスリットとしての空間５５ａを有していても良い。 Further, the shape of the fixing member 50 is not particularly limited, and a plurality of heat radiating members 27 are placed and fixed at both ends 28, 28 in the length direction thereof, and the intermediate portion 29 is in a non-contact shape. All you need is. The sheet 51 forming the fixing member 50 is not limited to a rectangular member in a plan view, and may be, for example, a long side member such as a parallelogram, an ellipse, or a polygon. Further, the sheet 51 is not limited to having its long side and / or short side formed by a straight line, and the long side and / or short side may have irregularities such as a zigzag line. Further, although the fixing member 50 is formed of two sheets 51 and 51, it may be formed of one frame-shaped member having a space 55 inside. Further, the sheet 51a forming the fixing member 50a is not a member having a square frame shape having slits in a plan view, but has an outer shape such as an ellipse, a circle, or a polygon, and has a space 55a as a slit inside thereof. You may be.
　また、上述の各実施形態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、第２実施形態に係る放熱構造体シート６０ａを、第１実施形態に係る放熱構造体シート６０のような凹部５２を備えてものとしても良い。 Further, the plurality of components of each of the above-described embodiments can be freely combined except when they cannot be combined with each other. For example, the heat radiating structure sheet 60a according to the second embodiment may be provided with a recess 52 such as the heat radiating structure sheet 60 according to the first embodiment.
　本発明に係る放熱構造体シートから形成される放熱構造体は、例えば、自動車用バッテリーの他、自動車、工業用ロボット、発電装置、ＰＣ、家庭用電化製品などの各種電子機器にも利用することができる。

  The heat-dissipating structure formed from the heat-dissipating structure sheet according to the present invention is used not only for automobile batteries, but also for various electronic devices such as automobiles, industrial robots, power generation devices, PCs, and household electric appliances. Can be done.

Claims (7)

  1. 　熱源からの放熱を高める複数の放熱部材と、前記放熱部材を固定する固定部材と、を備え、
    　前記放熱部材は、
    　前記熱源からの熱を伝えるためのスパイラル状に巻回しながら進行する形状の熱伝導シートと、
    　前記熱伝導シートの環状裏面に備えられ、前記熱伝導シートの巻回しながら進行する方向に貫通する貫通路を有し、前記熱伝導シートに比べて前記熱源の表面形状に合わせて変形容易な筒状のクッション部材と、
    を備え、
    　前記固定部材は、前記複数の放熱部材をその長さ方向の両端部を載置して固定するとともに、前記両端部以外の中間部が非接触となるシート状の部材である放熱構造体シート。     It is provided with a plurality of heat radiating members that enhance heat dissipation from the heat source and a fixing member that fixes the heat radiating member.
    The heat radiating member is
    A heat conductive sheet having a shape that advances while winding in a spiral shape for transferring heat from the heat source,
    A cylinder provided on the annular back surface of the heat conductive sheet, having a through-passage that penetrates in the direction of traveling while winding the heat conductive sheet, and is more easily deformed according to the surface shape of the heat source as compared with the heat conductive sheet. Shaped cushion member and
    With
    The fixing member is a heat-dissipating structure sheet which is a sheet-like member in which a plurality of heat-dissipating members are placed and fixed at both ends in the length direction, and intermediate portions other than the both ends are non-contact.
  2. 　前記固定部材は、前記複数の放熱部材の前記長さ方向の両端部の少なくとも一端部を収容する凹部を有することを特徴とする請求項１に記載の放熱構造体シート。 The heat radiating structure sheet according to claim 1, wherein the fixing member has recesses for accommodating at least one end of both ends of the plurality of heat radiating members in the length direction.
  3. 　前記固定部材は、前記中間部が前記熱源からの押圧により前記固定部材の外面と面一若しくは当該外面から突出可能な厚さを有する請求項１または２に記載の放熱構造体シート。 The heat radiating structure sheet according to claim 1 or 2, wherein the fixing member has a thickness such that the intermediate portion is flush with the outer surface of the fixing member or protrudes from the outer surface when pressed from the heat source.
  4. 　前記放熱部材は、前記固定部材に接着剤で接着されていることを特徴とする請求項１から３のいずれか１項に記載の放熱構造体シート。 The heat radiating structure sheet according to any one of claims 1 to 3, wherein the heat radiating member is adhered to the fixing member with an adhesive.
  5. 　前記熱伝導シートの表面に、当該表面に接触する熱源から当該表面への熱伝導性を高めるための熱伝導性オイルを有する請求項１から４のいずれか１項に記載の放熱構造体シート。 The heat radiating structure sheet according to any one of claims 1 to 4, wherein the surface of the heat conductive sheet has a heat conductive oil for increasing the heat conductivity from the heat source in contact with the surface to the surface.
  6. 　前記熱伝導性オイルは、シリコーンオイルと、前記シリコーンオイルより熱伝導性が高く、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とを含む請求項５に記載の放熱構造体シート。 The heat-dissipating structure sheet according to claim 5, wherein the thermally conductive oil contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and composed of one or more of metal, ceramics or carbon.
  7. 　請求項１から６のいずれか１項に記載の放熱構造体シートから当該シートより短い放熱構造体を製造する方法であって、
    　複数の放熱部材の長さ方向の両端部を前記固定部材に載置して固定する固定ステップと、
    　前記放熱部材の長さ方向の両端部が前記固定部材に固定された前記放熱構造体シートを、所定数の前記放熱部材を含むように前記長さ方向に沿って切断する切断ステップと、
    を含む放熱構造体の製造方法。

          A method of manufacturing a heat radiating structure shorter than the heat radiating structure sheet according to any one of claims 1 to 6.
    A fixing step in which both ends of a plurality of heat radiating members in the length direction are placed on the fixing member and fixed.
    A cutting step of cutting the heat radiating structure sheet in which both ends in the length direction of the heat radiating member are fixed to the fixing member along the length direction so as to include a predetermined number of the heat radiating members.
    A method for manufacturing a heat dissipation structure including.

PCT/JP2020/006549 2019-03-08 2020-02-19 Heat-dissipating structure sheet and method for manufacturing heat-dissipating structure WO2020184109A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09321468A (en) * 1996-05-30 1997-12-12 Toshiba Corp Heat radiating device
JP2013004783A (en) * 2011-06-17 2013-01-07 Sony Corp Heat radiation structure and display device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09321468A (en) * 1996-05-30 1997-12-12 Toshiba Corp Heat radiating device
JP2013004783A (en) * 2011-06-17 2013-01-07 Sony Corp Heat radiation structure and display device

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