WO2019230107A1 - Heat dissipation structure and battery - Google Patents

Heat dissipation structure and battery Download PDF

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Publication number
WO2019230107A1
WO2019230107A1 PCT/JP2019/009258 JP2019009258W WO2019230107A1 WO 2019230107 A1 WO2019230107 A1 WO 2019230107A1 JP 2019009258 W JP2019009258 W JP 2019009258W WO 2019230107 A1 WO2019230107 A1 WO 2019230107A1
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WO
WIPO (PCT)
Prior art keywords
cushion member
heat
battery
conductive sheet
heat dissipation
Prior art date
Application number
PCT/JP2019/009258
Other languages
French (fr)
Japanese (ja)
Inventor
純一 奥田
利次 古屋
Original Assignee
信越ポリマー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 信越ポリマー株式会社 filed Critical 信越ポリマー株式会社
Priority to CN201990000531.7U priority Critical patent/CN213638645U/en
Priority to JP2020521718A priority patent/JPWO2019230107A1/en
Publication of WO2019230107A1 publication Critical patent/WO2019230107A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • 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
    • H01L23/373—Cooling facilitated by selection of materials for the device or materials for thermal expansion adaptation, e.g. carbon
    • 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
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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 dissipation structure and a battery including the same.
  • the circuit board itself is made of a material with excellent heat dissipation, and a means such as attaching a heat sink or driving a cooling fan is combined singly or in combination.
  • a means such as attaching a heat sink or driving a cooling fan is combined singly or in combination.
  • the method of configuring the circuit board itself from a material having excellent heat dissipation, such as diamond, aluminum nitride (AlN), cBN, etc. increases the cost of the circuit board extremely.
  • the arrangement of the cooling fan causes problems such as failure of a rotating device called a fan, necessity of maintenance for preventing the failure, and securing of installation space.
  • the heat radiation fin can easily increase heat dissipation by increasing the surface area by forming a large number of columnar or flat projections using a metal having high thermal conductivity (for example, aluminum). Therefore, it is widely used as a heat dissipating component (see Patent Document 1).
  • the heat dissipating fins as described above tend to be heavy because they are made of metal.
  • the heat source, the cooling member, and the like are damaged by the metal protruding portion.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a heat dissipation structure that is lightweight and capable of suppressing damage to components disposed in the periphery, and a battery including the heat dissipation structure. .
  • a heat dissipating structure is a heat dissipating structure that is between a heat source and a cooling member and conducts heat from the heat source to the cooling member to enable heat dissipation from the heat source.
  • a heat conductive sheet that includes at least one of metal, carbon, or ceramics and that can be disposed between the heat source and the cooling member, and is provided between the heat source and the heat conductive sheet, the heat source as compared to the heat conductive sheet.
  • the cushion member includes a filler having higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body.
  • the cushion member is a rod-shaped cushion member having a recess recessed in the length direction thereof.
  • the recess is a through-passage that penetrates the cushion member in its length direction
  • the cushion member is a cylindrical cushion member having a through-passage
  • the cushion member includes a first cushion member and a second cushion member that covers an outer surface of the first cushion member, and the second cushion member is The heat conductivity is higher than that of the first cushion member.
  • the first cushion member is formed of a rubber-like elastic body
  • the second cushion member is formed of a rubber-like elastic body containing a filler.
  • a plurality of cushion members are provided on the heat conductive sheet.
  • a battery according to an embodiment is a battery including one or two or more battery cells as heat sources in a casing in contact with a cooling member, and the cooling member is disposed between the heat source and the cooling member.
  • the heat dissipation structure includes at least one of metal, carbon, or ceramics, and can be disposed between the heat source and the cooling member.
  • a cushion member that is provided between the heat source and the heat conductive sheet and is easily deformable in accordance with the surface shape of the heat source as compared with the heat conductive sheet. Contains a filler having higher thermal conductivity than an elastic body.
  • the cushion member is a rod-shaped cushion member having a recess recessed in the length direction.
  • the concave portion is a through passage that penetrates the cushion member in the length direction thereof, and the cushion member is a cylindrical cushion member having a through passage.
  • the cushion member includes a first cushion member and a second cushion member that covers an outer surface of the first cushion member, and the second cushion member includes Thermal conductivity is high compared to 1 cushion member.
  • the first cushion member is formed of a rubber-like elastic body
  • the second cushion member is formed of a rubber-like elastic body containing a filler.
  • a plurality of cushion members are provided on the heat conductive sheet, and one or two or more battery cells in the housing are placed thereon.
  • thermoelectric structure that is lightweight and capable of suppressing damage to components arranged in the vicinity, and a battery including the heat dissipating structure.
  • FIG. 1A is a longitudinal sectional view of a heat dissipation structure according to the present embodiment and a battery including the heat dissipation structure.
  • FIG. 1B is a longitudinal sectional view of a heat dissipation structure according to the present embodiment and a battery including the heat dissipation structure when the heat dissipation structure is compressed by battery cells.
  • FIG. 2A shows a perspective view of the heat dissipation structure according to the present embodiment.
  • FIG. 2B shows a longitudinal sectional view of the cushion member of the heat dissipation structure according to the present embodiment.
  • FIG. 3 is a perspective view showing a state in which the heat dissipation structure is arranged directly below the battery cell.
  • FIG. 4 shows a modification of the heat dissipation structure of the present invention.
  • SYMBOLS 1 Heat dissipation structure, 2 ... Heat conduction sheet, 3 ... Cushion member, 10 ... Battery cell (an example of a heat source), 20 ... Battery, 21 ... Housing, 26 ⁇ Cooling member, 31 ⁇ Penetration path (an example of a recess), ⁇ 32 ⁇ 1st cushion member, ⁇ 2nd cushion member, and 40 ⁇ Heat source
  • FIG. 1A shows a longitudinal sectional view of a heat dissipation structure according to this embodiment and a battery including the heat dissipation structure.
  • FIG. 1B is a longitudinal sectional view of a heat dissipation structure according to the present embodiment and a battery including the heat dissipation structure when the heat dissipation structure is compressed by battery cells.
  • FIG. 2A shows a perspective view of the heat dissipation structure according to the present embodiment.
  • FIG. 2B shows a longitudinal sectional view of the cushion member of the heat dissipation structure.
  • the battery 20 has a structure in which a plurality of battery cells 10 are provided in a casing 21 with which the cooling member 26 is brought into contact.
  • the heat dissipating structure 1 includes an end portion (lower end portion) near the cooling member (for example, cooling water) 26 of the battery cell 10 that is an example of a heat source and a part (bottom portion) of the casing 21 near the cooling member 26. 22).
  • the heat dissipation structure 1 is a structure that allows heat to be radiated from the battery cell 10 by conducting heat from the battery cell 10 to the cooling member 26.
  • the heat dissipation structure 1 includes at least one of metal, carbon, or ceramics, and can be disposed between the battery cell 10 and the cooling member 26, and between the battery cell 10 and the heat conduction sheet 2.
  • a cushion member 3 that is easily deformed in accordance with the surface shape of the heat source as compared with the heat conductive sheet 2.
  • the cushion member 3 contains a filler having higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body.
  • the cushion member 3 is preferably a cylindrical cushion member having a through passage 31 penetrating in the length direction thereof.
  • the cushion member 3 preferably includes a first cushion member 32 and a second cushion member 33 that covers the outer surface of the first cushion member 32.
  • the second cushion member 33 has higher thermal conductivity than the first cushion member 32.
  • the heat conductive sheet 2 has a function of conducting heat from the battery cell 10 to the cooling member 26.
  • the battery 20 shown in FIGS. 1A and 1B includes a plurality of battery cells 10 as heat sources in a casing 21 with which a cooling member 26 contacts.
  • a plurality of cushion members 3 are provided on the heat conductive sheet 2 and a plurality of battery cells 10 are placed thereon.
  • the “cross section” or “longitudinal section” means a section in a direction perpendicular to the upper opening surface from the upper opening surface in the inside 24 of the casing 21 of the battery 20 to the bottom portion 22. *
  • the battery 20 is, for example, a battery for an electric vehicle and includes a large number of battery cells 10.
  • the battery 20 includes a bottomed casing 21 that opens to one side.
  • the housing 21 is preferably made of aluminum or an aluminum-based alloy.
  • the battery cell 10 is disposed inside the housing 21.
  • electrodes 11 and 12 are provided so as to protrude.
  • the plurality of battery cells 10 are preferably brought into close contact with each other by applying a force in the direction of compression using screws or the like from both sides in the casing 21 (not shown).
  • One or a plurality of water cooling pipes 25 are provided on the bottom 22 of the casing 21 in order to flow cooling water as an example of the cooling member 26.
  • the battery cell 10 is disposed in the housing 21 so as to sandwich the heat dissipation structure 1 between the battery cell 10 and the bottom portion 22.
  • the battery cell 10 transfers heat to the casing 21 through the heat dissipation structure 1 and is effectively removed by water cooling.
  • the cooling member 26 is not limited to cooling water, but is interpreted to include organic solvents such as liquid nitrogen and ethanol.
  • the cooling member 26 is not necessarily a liquid under the conditions used for cooling, and may be a gas or a solid.
  • the thermal conductive sheet 2 is preferably a sheet containing carbon, more preferably a sheet containing a carbon filler and a resin.
  • Carbon as used in the present application includes any structure made 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 2 can be a thin sheet obtained by curing a material in which graphite fibers and carbon particles are blended and dispersed in a resin. Instead of graphite fiber or carbon particles, an expanded graphite filler may be used.
  • Expanded graphite rapidly heats the graphite intercalation compound in which the substance is inserted into scale-like graphite using a chemical reaction to gasify the interlayer material, and the release of gas generated at that time expands the graphite layer, and the stacking direction of the layers
  • the heat conductive sheet 2 may be a carbon fiber knitted in a mesh shape, and may be mixed or knitted. Note that all fillers made of graphite fiber, carbon particles, carbon fiber, or expanded graphite are also included in the concept of carbon filler.
  • the resin may exceed 50% by mass or 50% by mass or less with respect to the total mass of the heat conductive sheet 2. That is, the heat conductive sheet 2 does not ask
  • a thermoplastic resin can be suitably used as the resin.
  • the thermoplastic resin a resin having a high melting point that does not melt when conducting heat from the battery cell 10 which is an example of a heat source is preferable.
  • PPS polyphenylene sulfide
  • PEEK polyether ether ketone
  • PAI polyamide imide
  • the resin is dispersed, for example, in the form of particles in the gaps between the carbon fillers before the heat conductive sheet 2 is molded.
  • the heat conductive sheet 2 may be dispersed with AlN or diamond as a filler for further enhancing heat conduction.
  • an elastomer that is more flexible than the resin may be used.
  • the heat conductive sheet 2 can also be a sheet containing metal and / or ceramics instead of or together with carbon as described above.
  • a metal having a relatively high thermal conductivity such as aluminum, copper, or an alloy containing at least one of them can be selected.
  • ceramics those having relatively high thermal conductivity such as AlN, cBN, hBN, and the like can be selected.
  • the thermal conductivity of the heat conductive sheet 2 is preferably 10 W / mK or more.
  • the heat conductive sheet 2 is a strip-shaped plate of aluminum, an aluminum alloy, copper or stainless steel, and is made of a material having excellent heat conductivity and conductivity.
  • the heat conductive sheet 2 is preferably a sheet having excellent curvature (or flexibility), and the thickness thereof is not limited, but is preferably 0.05 to 5 mm, and more preferably 0.065 to 0.5 mm.
  • the thickness is determined by comprehensively considering the strength, flexibility and thermal conductivity of the sheet. preferable.
  • cushion member 3 The important functions of the cushion member 3 are ease of deformation and resilience. Deformability is a characteristic necessary for following the shape of the battery cell 10, and in particular, a semi-solid material such as a lithium ion battery, contents having liquid properties, etc. are contained in a package that is easily deformed. In the case of the battery cell 10, there are many cases where the design dimensions are indefinite or the dimensional accuracy cannot be increased. For this reason, holding
  • the cushion member 3 is a cylindrical cushion member provided with a through-passage 31 as shown in FIG. 2B. Even when the lower end portions of the plurality of battery cells 10 are not flat, the cushion member 3 makes good contact between the heat conductive sheet 2 and the lower end portions. Further, the through passage 31 contributes to facilitating the deformation of the cushion member 3 and has a function of increasing the contact between the heat conductive sheet 2 and the lower end portion of the battery cell 10.
  • the cushion member 3 is provided between the battery cell 10 and the bottom portion 22 and has a function as a protective member that prevents the heat conductive sheet 2 from being damaged by a load applied to the heat conductive sheet 2 in addition to the function of exerting cushioning properties. Have. In this embodiment, the cushion member 3 is a member having low thermal conductivity as compared to the thermal conductive sheet 2.
  • the cushion member 3 is a double-structured cylindrical member configured in the order of the first cushion member 32 and the second cushion member 33 from the through passage 31 toward the radially outer side.
  • the first cushion member 32 is preferably a thermosetting 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); It is configured to include thermoplastic elastomers such as urethane, ester, styrene, olefin, butadiene, and fluorine, or composites thereof.
  • the first cushion member 32 is preferably made of a material having high heat resistance that can maintain its form without being melted or decomposed by heat transmitted through the heat conductive sheet 2.
  • the first cushion member 32 is more preferably made of a urethane elastomer impregnated with silicone or silicone rubber.
  • the second cushion member 33 is made of a material having higher thermal conductivity than the first cushion member 32.
  • the second cushion member 33 is configured by dispersing fillers typified by AlN, cBN, hBN, diamond particles, and the like in the rubber as described above in order to increase its thermal conductivity.
  • the filler is dispersed in silicone rubber having excellent heat conductivity. Composed.
  • the thickness of the second cushion member 33 is not limited, but is preferably 0.3 to 5 mm, and more preferably 0.3 to 1 mm.
  • the thermal conductivity of the second cushion member 33 decreases as the thickness increases.
  • the second cushion member 33 containing the filler is less flexible than the first cushion member 32 not containing the filler. For this reason, it is preferable to determine the thickness of the battery cell 10 in consideration of the unevenness of the surface of the battery cell 10 or rubber hardness and thermal conductivity.
  • the cushion member 3 of the present embodiment is configured such that the filler is dispersed only in the second cushion member 33, compared to the case where the filler is dispersed in both the first cushion member 32 and the second cushion member 33, The manufacturing cost can be suppressed, and the decrease in flexibility of the rubber can be suppressed.
  • the cushion member 3 may be one that does not include bubbles in addition to the one that includes bubbles therein.
  • the “cushion member” means a member that is rich in flexibility and can be deformed so as to be in close contact with the surface of the heat source. In this sense, it can be read as “rubber-like elastic body”.
  • FIG. 3 is a perspective view showing a state in which the heat dissipating structure is arranged directly below the battery cell.
  • the battery cell 10 includes electrodes 11 and 12 on the side opposite to the side in contact with the heat dissipation structure 1 (upward in FIGS. 1 and 3).
  • a plurality of cushion members 3 are arranged on the heat conductive sheet 2 in parallel with the longitudinal direction of the battery cell 10 (the depth direction in FIG. 3).
  • ten cushion members 3 are disposed on the heat conductive sheet 2, but the number of cushion members 3 disposed on the heat conductive sheet 2 is not limited to ten.
  • the number of battery cells 10 arranged in the heat dissipation structure 1 is not particularly limited.
  • the heat dissipation structure 1 in the housing 21 is in contact with the lower end located on the opposite side of the electrodes 11, 12 of the battery cell 10, and the lower end and the bottom of the housing 21. 22 is compressed in the vertical direction.
  • the cushion member 3 since the cushion member 3 is deformed, the contact between the lower end portion of the battery cell 10 and the heat conductive sheet 2 is improved. Heat generated during charging or discharging of the battery 20 is transmitted from the lower end of the battery cell 10 to the cushion member 3, the heat conductive sheet 2, the bottom 22 of the housing 21, and the cooling member 26.
  • the heat dissipation structure 1 may be disposed in the housing 21 with the cushion member 3 facing the battery cell 10 and the heat conductive sheet 2 facing the cooling member 26 (may be referred to as the bottom 22 side). good.
  • the heat dissipation structure 1 is located between the battery 20 and the cooling member 26 and conducts heat from the battery 20 to the cooling member 26 to enable heat dissipation from the battery 20.
  • a heat conductive sheet 2 that includes at least one of carbon or ceramics and can be disposed between the battery 20 and the cooling member 26, and is provided between the battery 20 and the heat conductive sheet 2, as compared with the heat conductive sheet 2.
  • a cushion member 3 that can be easily deformed in accordance with the surface shape of the battery 20. The cushion member 3 contains a filler having higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body.
  • the battery cell 20 can be adapted to various forms.
  • the cushion member 3 is a cylindrical cushion member having a through passage 31 penetrating in the length direction. For this reason, the deformability of the cushion member 3 is improved, and even when the lower end portions of the plurality of battery cells 10 are not flat, the contact between the heat conductive sheet 2 and the lower end portion can be improved. Further, the heat dissipation structure 1 is lighter due to the through passage 31.
  • the cushion member 3 includes a first cushion member 32 and a second cushion member 33 that covers the outer surface of the first cushion member 32, and the second cushion member 33 is more heated than the first cushion member 31.
  • High conductivity the first cushion member 32 is formed of a rubber-like elastic body
  • the second cushion member is formed of a rubber-like elastic body containing a filler having higher thermal conductivity than the rubber-like elastic body. For this reason, the heat generated when the battery 20 is charged or discharged can further increase the thermal conductivity from the battery cell 10 to the heat conductive sheet 2.
  • the 1st cushion member 32 which does not contain a filler inside the 2nd cushion member 33, the fall of the deformability of a cushion member can be suppressed.
  • the cushion member 3 is provided in plural on the heat conductive sheet 2, the surface area of the cushion member on the heat conductive sheet 2 is increased, and effective heat removal of the battery cell 10 is realized.
  • the heat source includes not only the battery cell 10 but also all objects that generate heat, such as a circuit board and an electronic device main body.
  • the heat source may be an electronic component such as a capacitor and an IC chip.
  • the cooling member 26 may be not only cooling water but also an organic solvent, liquid nitrogen, or cooling gas.
  • the heat dissipation structure 1 or the like may be disposed in a structure other than the battery 20 or the like, for example, an electronic device, a home appliance, a power generation device, or the like.
  • FIG. 4 shows a longitudinal sectional view when the heat dissipation structure of the present invention is adopted as a cylindrical heat source.
  • the heat dissipating structure 1 of the present invention is employed in a columnar heat source 40, the surface opposite to the surface on which the cushion member 3 is disposed in the heat conductive sheet 2 is used as the heat source 40. By winding and pressing the surface on which the cushion member 3 is disposed to the cooling member, effective heat removal of the heat source 40 can be realized.
  • the plurality of cushion members 3 are arranged on the heat conductive sheet 2, but one cushion member 3 may be arranged on the heat conductive sheet 2.
  • the plurality of cushion members 3 are arranged in parallel to each other on the heat conductive sheet 2, but may be arranged in non-parallel on the heat conductive sheet 2.
  • the cushion member 3 in the above-described embodiment is a cylindrical cushion member having the through passage 31, the cushion member 3 may not have the through passage 31.
  • the longitudinal cross-sectional shape of the cushion member 3 is not limited to a circle, For example, a polygon may be sufficient.
  • the cushion member 3 may be a rod-like cushion member having a recess recessed in the length direction instead of the through passage 31.
  • the cushion member 3 is more easily deformable as the depression in the length direction is larger. For this reason, it is more preferable that the cushion member 3 has a recess that blocks one opening portion of the through passage 31.
  • the cushion member 3 in the above-described embodiment has a double structure including the first cushion member 32 and the second cushion member 33
  • the cushion member 3 may be formed of only the second cushion member 33.
  • the cushion member 3 may have a multiple structure of a triple structure or more. In such a case, it is preferable that the cushion member 3 employs a member having higher thermal conductivity toward the radially outer side.
  • the 1st cushion member 32 in the above-mentioned embodiment was a rubber-like elastic body which does not contain fillers, such as silicone rubber, similarly to the 2nd cushion member 33, in a rubber
  • the amount of filler contained in the first cushion member 32 is preferably configured to be smaller than the amount of filler contained in the second cushion member 33.
  • the 1st cushion member 32 and the 2nd cushion member 33 produced the difference in heat conductivity with content of a filler
  • the kind of filler to contain or the cushion member 3 A difference in thermal conductivity may be caused depending on the material.
  • the filler contained in the second cushion member 33 may be a filler having higher thermal conductivity than the filler contained in the first cushion member 32.
  • the cushion member 3 may be formed so that the second cushion member 33 is made of a material having higher thermal conductivity than the first cushion member 32.
  • a highly flexible rubber sheet may be interposed on the surface of the cushion member 3 and / or the surface of the heat conductive sheet 2 that contacts the heat source or the cooling member 26. However, in that case, it is preferable to reduce the thickness of the rubber sheet because the thermal conductivity of the heat dissipation structure 1 can be maintained high.
  • the heat dissipating structure according to the present invention can be used, for example, in various electronic devices such as automobiles, industrial robots, power generation devices, PCs, and household appliances in addition to automobile batteries.
  • the battery according to the present invention can be used for a battery for home use and a battery for an electronic device such as a PC, in addition to a battery for an automobile.

Abstract

[Problem] To provide a heat dissipation structure that is light and with which it is possible to inhibit damage to components disposed in the surroundings, and a battery provided with the heat dissipation structure. [Solution] The present invention pertains to a heat dissipation structure 1 placed between a battery 20 and a cooling member 26, the heat dissipation structure 1 conducting heat from the battery 20 to the cooling member 26 and enabling dissipation of heat from the battery 20, wherein: the heat dissipation structure 1 is provided with a heat-conductive sheet 2, which contains a metal, carbon, and/or a ceramic, and which can be disposed between the battery 20 and the cooling member 26, and a cushion member 3, which is provided between the battery 20 and the heat-conductive sheet 2 and which deforms, more easily than the heat-conductive sheet 2, to match the surface shape of the battery 20; and the cushion member 3 is one in which a rubber elastic body contains a filler having a higher heat conductivity than the rubber elastic body. The present invention also pertains to a battery provided with the heat dissipation structure 1.

Description

放熱構造体およびバッテリーHeat dissipation structure and battery クロスリファレンスCross reference
　本出願は、２０１８年５月２９日に日本国において出願された特願２０１８－１０２０８８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. 2018-102088 filed in Japan on May 29, 2018, the contents of which are incorporated herein by reference. Moreover, the content described in the patent quoted in this application, a patent application, and literature is used for this specification.
　本発明は、放熱構造体およびそれを備えるバッテリーに関する。 The present invention relates to a heat dissipation structure and a battery including the same.
　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 home or commercial electronic devices have become more accurate and complex, and along with this, the integration density of small electronic components on circuit boards has been increasing. . As a result, it is strongly desired to solve the failure and shortening of the life of electronic components due to the 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）、ｃＢＮなど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 with excellent heat dissipation, and a means such as attaching a heat sink or driving a cooling fan is combined singly or in combination. Has been done. Among these, the method of configuring the circuit board itself from a material having excellent heat dissipation, such as diamond, aluminum nitride (AlN), cBN, etc., increases the cost of the circuit board extremely. In addition, the arrangement of the cooling fan causes problems such as failure of a rotating device called a fan, necessity of maintenance for preventing the failure, and securing of installation space. On the other hand, the heat radiation fin can easily increase heat dissipation by increasing the surface area by forming a large number of columnar or flat projections using a metal having high thermal conductivity (for example, aluminum). Therefore, it is widely used as a heat dissipating component (see Patent Document 1).
特開２００８－２４３９９９JP2008-243999A
　しかしながら、上述のような放熱フィンは、金属で形成されているため重量が大きくなりがちであった。また、金属製の突出部位により熱源や冷却部材など周辺に配置される部品を傷付けてしまう虞があった。 However, the heat dissipating fins as described above tend to be heavy because they are made of metal. In addition, there is a possibility that parts disposed around the heat source, the cooling member, and the like are damaged by the metal protruding portion.
　本発明は、上記課題に鑑みてなされたものであり、軽量でかつ周辺に配置される部品の損傷を抑制可能な放熱構造体、および当該放熱構造体を備えるバッテリーを提供することを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat dissipation structure that is lightweight and capable of suppressing damage to components disposed in the periphery, and a battery including the heat dissipation 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は、熱源と冷却部材との間にあって熱源から冷却部材に熱を伝導させて熱源からの放熱を可能とする放熱構造体であって、金属、炭素若しくはセラミックスの少なくとも１つを含み、熱源と冷却部材との間に配置可能な熱伝導シートと、熱源と熱伝導シートとの間に備えられ、熱伝導シートに比べて熱源の表面形状に合わせて変形容易なクッション部材と、を備え、クッション部材は、ゴム状弾性体に、当該ゴム状弾性体より熱伝導性の高いフィラーを含有する。 (1) A heat dissipating structure according to an embodiment for achieving the above object is a heat dissipating structure that is between a heat source and a cooling member and conducts heat from the heat source to the cooling member to enable heat dissipation from the heat source. A heat conductive sheet that includes at least one of metal, carbon, or ceramics and that can be disposed between the heat source and the cooling member, and is provided between the heat source and the heat conductive sheet, the heat source as compared to the heat conductive sheet. The cushion member includes a filler having higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body.
（２）別の実施形態に係る放熱構造体では、好ましくは、クッション部材は、その長さ方向に窪む凹部を有する棒状クッション部材である。 (2) In the heat dissipation structure according to another embodiment, preferably, the cushion member is a rod-shaped cushion member having a recess recessed in the length direction thereof.
（３）別の実施形態に係る放熱構造体では、好ましくは、凹部は、クッション部材をその長さ方向に貫通する貫通路であり、クッション部材は、貫通路を有する筒状クッション部材である。 (3) In the heat dissipation structure according to another embodiment, preferably, the recess is a through-passage that penetrates the cushion member in its length direction, and the cushion member is a cylindrical cushion member having a through-passage.
（４）別の実施形態に係る放熱構造体では、好ましくは、クッション部材は、第１クッション部材と、第１クッション部材の外側面を覆う第２クッション部材と、を備え、第２クッション部材は、第１クッション部材に比べて熱伝導性が高い。 (4) In the heat dissipation structure according to another embodiment, preferably, the cushion member includes a first cushion member and a second cushion member that covers an outer surface of the first cushion member, and the second cushion member is The heat conductivity is higher than that of the first cushion member.
（５）別の実施形態に係る放熱構造体では、好ましくは、第１クッション部材は、ゴム状弾性体で形成され、第２クッション部材は、フィラーを含有するゴム状弾性体で形成されている。 (5) In the heat dissipation structure according to another embodiment, preferably, the first cushion member is formed of a rubber-like elastic body, and the second cushion member is formed of a rubber-like elastic body containing a filler. .
（６）別の実施形態に係る放熱構造体では、好ましくは、クッション部材は、熱伝導シート上に複数個設けられている。 (6) In the heat dissipation structure according to another embodiment, preferably, a plurality of cushion members are provided on the heat conductive sheet.
（７）一実施形態に係るバッテリーは、冷却部材を接触させる筐体内に、１または２以上の熱源としてのバッテリーセルを備えたバッテリーであって、熱源と冷却部材との間にあって熱源から冷却部材に熱を伝導させて熱源からの放熱を可能とする放熱構造体を備え、放熱構造体は、金属、炭素若しくはセラミックスの少なくとも１つを含み、熱源と冷却部材との間に配置可能な熱伝導シートと、熱源と熱伝導シートとの間に備えられ、熱伝導シートに比べて熱源の表面形状に合わせて変形容易なクッション部材と、を備え、クッション部材は、ゴム状弾性体に、ゴム状弾性体より熱伝導性の高いフィラーを含有する。 (7) A battery according to an embodiment is a battery including one or two or more battery cells as heat sources in a casing in contact with a cooling member, and the cooling member is disposed between the heat source and the cooling member. The heat dissipation structure includes at least one of metal, carbon, or ceramics, and can be disposed between the heat source and the cooling member. And a cushion member that is provided between the heat source and the heat conductive sheet and is easily deformable in accordance with the surface shape of the heat source as compared with the heat conductive sheet. Contains a filler having higher thermal conductivity than an elastic body.
（８）別の実施形態に係るバッテリーでは、好ましくは、クッション部材は、その長さ方向に窪む凹部を有する棒状クッション部材である。 (8) In a battery according to another embodiment, preferably, the cushion member is a rod-shaped cushion member having a recess recessed in the length direction.
（９）別の実施形態に係るバッテリーでは、好ましくは、凹部は、クッション部材をその長さ方向に貫通する貫通路であり、クッション部材は、貫通路を有する筒状クッション部材である。 (9) In a battery according to another embodiment, preferably, the concave portion is a through passage that penetrates the cushion member in the length direction thereof, and the cushion member is a cylindrical cushion member having a through passage.
（１０）別の実施形態に係るバッテリーでは、好ましくは、クッション部材は、第１クッション部材と、第１クッション部材の外側面を覆う第２クッション部材と、を備え、第２クッション部材は、第１クッション部材に比べて熱伝導性が高い。 (10) In the battery according to another embodiment, preferably, the cushion member includes a first cushion member and a second cushion member that covers an outer surface of the first cushion member, and the second cushion member includes Thermal conductivity is high compared to 1 cushion member.
（１１）別の実施形態に係るバッテリーでは、好ましくは、第１クッション部材は、ゴム状弾性体で形成され、第２クッション部材は、フィラーを含有するゴム状弾性体で形成されている。 (11) In a battery according to another embodiment, preferably, the first cushion member is formed of a rubber-like elastic body, and the second cushion member is formed of a rubber-like elastic body containing a filler.
（１２）別の実施形態に係るバッテリーでは、好ましくは、クッション部材は、熱伝導シート上に複数個設けられ、筐体内の１または２以上のバッテリーセルを載置している。 (12) In the battery according to another embodiment, preferably, a plurality of cushion members are provided on the heat conductive sheet, and one or two or more battery cells in the housing are placed thereon.
　本発明によれば、軽量でかつ周辺に配置される部品の損傷を抑制可能な放熱構造体、および当該放熱構造体を備えるバッテリーを提供できる。 According to the present invention, it is possible to provide a heat dissipating structure that is lightweight and capable of suppressing damage to components arranged in the vicinity, and a battery including the heat dissipating structure.
図１Ａは、本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. 1A is a longitudinal sectional view of a heat dissipation structure according to the present embodiment and a battery including the heat dissipation structure. 図１Ｂは、バッテリーセルによって放熱構造体を圧縮した場合の本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. 1B is a longitudinal sectional view of a heat dissipation structure according to the present embodiment and a battery including the heat dissipation structure when the heat dissipation structure is compressed by battery cells. 図２Ａは、本実施形態に係る放熱構造体の斜視図を示す。FIG. 2A shows a perspective view of the heat dissipation structure according to the present embodiment. 図２Ｂは、本実施形態に係る放熱構造体のクッション部材の縦断面図を示す。FIG. 2B shows a longitudinal sectional view of the cushion member of the heat dissipation structure according to the present embodiment. 図３は、バッテリーセルの直下に放熱構造体を配置する状態の斜視図を示す。FIG. 3 is a perspective view showing a state in which the heat dissipation structure is arranged directly below the battery cell. 図４は、本発明の放熱構造体の変形例を示す。FIG. 4 shows a modification of the heat dissipation structure of the present invention.
１・・・放熱構造体、２・・・熱伝導シート、３・・・クッション部材、１０・・・バッテリーセル（熱源の一例）、２０・・・バッテリー、２１・・・筐体、２６・・・冷却部材、３１・・・貫通路（凹部の一例）、３２・・・第１クッション部材、３３・・・第２クッション部材、４０・・・熱源。 DESCRIPTION OF SYMBOLS 1 ... Heat dissipation structure, 2 ... Heat conduction sheet, 3 ... Cushion member, 10 ... Battery cell (an example of a heat source), 20 ... Battery, 21 ... Housing, 26 ··· Cooling member, 31 ··· Penetration path (an example of a recess), ··· 32 ··· 1st cushion member, ············ 2nd cushion member, and 40 ··· Heat source
　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. The embodiments described below do not limit the invention according to the claims, and all the elements and combinations thereof described in the embodiments are the means for solving the present invention. It is not always essential.
　図１Ａは、本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。図１Ｂは、バッテリーセルによって放熱構造体を圧縮した場合の本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。図２Ａは、本実施形態に係る放熱構造体の斜視図を示す。図２Ｂは、当該放熱構造体のクッション部材の縦断面図を示す。 FIG. 1A shows a longitudinal sectional view of a heat dissipation structure according to this embodiment and a battery including the heat dissipation structure. FIG. 1B is a longitudinal sectional view of a heat dissipation structure according to the present embodiment and a battery including the heat dissipation structure when the heat dissipation structure is compressed by battery cells. FIG. 2A shows a perspective view of the heat dissipation structure according to the present embodiment. FIG. 2B shows a longitudinal sectional view of the cushion member of the heat dissipation structure.
　バッテリー２０は、図１Ａおよび図１Ｂに示すように、冷却部材２６を接触させる筐体２１内に複数のバッテリーセル１０を備えた構造を有する。放熱構造体１は、熱源の一例であるバッテリーセル１０の冷却部材（例えば、冷却水）２６に近い側の端部（下端部）と冷却部材２６に近い側の筐体２１の一部（底部２２）との間に備えられている。 As shown in FIGS. 1A and 1B, the battery 20 has a structure in which a plurality of battery cells 10 are provided in a casing 21 with which the cooling member 26 is brought into contact. The heat dissipating structure 1 includes an end portion (lower end portion) near the cooling member (for example, cooling water) 26 of the battery cell 10 that is an example of a heat source and a part (bottom portion) of the casing 21 near the cooling member 26. 22).
　放熱構造体１は、バッテリーセル１０から冷却部材２６に熱を伝導させてバッテリーセル１０からの放熱を可能とする構造体である。放熱構造体１は、金属、炭素若しくはセラミックスの少なくとも１つを含み、バッテリーセル１０と冷却部材２６との間に配置可能な熱伝導シート２と、バッテリーセル１０と熱伝導シート２との間に備えられ、熱伝導シート２に比べて熱源の表面形状に合わせて変形容易なクッション部材３と、を備える。クッション部材３は、ゴム状弾性体に、ゴム状弾性体より熱伝導性の高いフィラーを含有する。また、クッション部材３は、好ましくは、その長さ方向に貫通する貫通路３１を有する筒状クッション部材である。クッション部材３は、好ましくは、第１クッション部材３２と、第１クッション部材３２の外側面を覆う第２クッション部材３３と、を備える。第２クッション部材３３は、第１クッション部材３２に比べて熱伝導性が高い。 The heat dissipation structure 1 is a structure that allows heat to be radiated from the battery cell 10 by conducting heat from the battery cell 10 to the cooling member 26. The heat dissipation structure 1 includes at least one of metal, carbon, or ceramics, and can be disposed between the battery cell 10 and the cooling member 26, and between the battery cell 10 and the heat conduction sheet 2. And a cushion member 3 that is easily deformed in accordance with the surface shape of the heat source as compared with the heat conductive sheet 2. The cushion member 3 contains a filler having higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body. The cushion member 3 is preferably a cylindrical cushion member having a through passage 31 penetrating in the length direction thereof. The cushion member 3 preferably includes a first cushion member 32 and a second cushion member 33 that covers the outer surface of the first cushion member 32. The second cushion member 33 has higher thermal conductivity than the first cushion member 32.
　熱伝導シート２は、バッテリーセル１０からの熱を冷却部材２６へと伝導させる機能を有する。図１Ａおよび図１Ｂのバッテリー２０は、冷却部材２６を接触させる筐体２１内に熱源としての複数のバッテリーセル１０を備えている。クッション部材３は、熱伝導シート２上に複数個設けられ、複数のバッテリーセル１０を載置している。なお、本願では、「断面」あるいは「縦断面」とは、バッテリー２０の筐体２１の内部２４における上方開口面から底部２２へと垂直に切断する方向の断面を意味する。　 The heat conductive sheet 2 has a function of conducting heat from the battery cell 10 to the cooling member 26. The battery 20 shown in FIGS. 1A and 1B includes a plurality of battery cells 10 as heat sources in a casing 21 with which a cooling member 26 contacts. A plurality of cushion members 3 are provided on the heat conductive sheet 2 and a plurality of battery cells 10 are placed thereon. In the present application, the “cross section” or “longitudinal section” means a section in a direction perpendicular to the upper opening surface from the upper opening surface in the inside 24 of the casing 21 of the battery 20 to the bottom portion 22. *
　次に、バッテリー２０の概略構成および放熱構造体１の構成部材について、より詳しく説明する。 Next, the schematic configuration of the battery 20 and the components of the heat dissipation structure 1 will be described in more detail.
（１）バッテリーの構成の概略
　本実施形態において、バッテリー２０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１０を備える。バッテリー２０は、一方に開口する有底型の筐体２１を備える。筐体２１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１０は、筐体２１の内部２４に配置される。バッテリーセル１０の上方には、電極１１，１２（図３参照）が突出して設けられている。複数のバッテリーセル１０は、好ましくは、筐体２１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２１の底部２２には、冷却部材２６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２５が備えられている。バッテリーセル１０は、底部２２との間に、放熱構造体１を挟むようにして筐体２１内に配置されている。このような構造のバッテリー２０では、バッテリーセル１０は、放熱構造体１を通じて筐体２１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２６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２６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 20 is, for example, a battery for an electric vehicle and includes a large number of battery cells 10. The battery 20 includes a bottomed casing 21 that opens to one side. The housing 21 is preferably made of aluminum or an aluminum-based alloy. The battery cell 10 is disposed inside the housing 21. Above the battery cell 10, electrodes 11 and 12 (see FIG. 3) are provided so as to protrude. The plurality of battery cells 10 are preferably brought into close contact with each other by applying a force in the direction of compression using screws or the like from both sides in the casing 21 (not shown). One or a plurality of water cooling pipes 25 are provided on the bottom 22 of the casing 21 in order to flow cooling water as an example of the cooling member 26. The battery cell 10 is disposed in the housing 21 so as to sandwich the heat dissipation structure 1 between the battery cell 10 and the bottom portion 22. In the battery 20 having such a structure, the battery cell 10 transfers heat to the casing 21 through the heat dissipation structure 1 and is effectively removed by water cooling. The cooling member 26 is not limited to cooling water, but is interpreted to include organic solvents such as liquid nitrogen and ethanol. The cooling member 26 is not necessarily 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２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。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２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。グラファイト繊維やカーボン粒子に代えて、膨張黒鉛性のフィラーを用いても良い。膨張黒鉛は、化学反応を用いて鱗片状の黒鉛に物質を挿入した黒鉛層間化合物を急熱して層間の物質がガス化し、その時に生じたガスの放出によって黒鉛の層間が広がり、層の積み重なり方向に膨張した状態になった黒鉛をいう。また、熱伝導シート２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、カーボンファイバーあるいは膨張黒鉛製のフィラーも、すべて、炭素フィラーの概念に含まれる。 (2) Thermal conductive sheet The thermal conductive sheet 2 is preferably a sheet containing carbon, more preferably a sheet containing a carbon filler and a resin. “Carbon” as used in the present application includes any structure made 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 2 can be a thin sheet obtained by curing a material in which graphite fibers and carbon particles are blended and dispersed in a resin. Instead of graphite fiber or carbon particles, an expanded graphite filler may be used. Expanded graphite rapidly heats the graphite intercalation compound in which the substance is inserted into scale-like graphite using a chemical reaction to gasify the interlayer material, and the release of gas generated at that time expands the graphite layer, and the stacking direction of the layers This refers to graphite that has been expanded. Further, the heat conductive sheet 2 may be a carbon fiber knitted in a mesh shape, and may be mixed or knitted. Note that all fillers made of graphite fiber, carbon particles, carbon fiber, or expanded graphite are also included in the concept of carbon filler.
　熱伝導シート２に樹脂を含む場合には、当該樹脂が熱伝導シート２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２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１０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）等を好適に挙げることができる。樹脂は、熱伝導シート２の成形前の状態において、炭素フィラーの隙間に、例えば粒子状に分散している。熱伝導シート２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。 When the heat conductive sheet 2 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 2. That is, the heat conductive sheet 2 does not ask | require whether it uses resin as a main material, as long as there is no big trouble in heat conduction. For example, a thermoplastic resin can be suitably used as the resin. As the thermoplastic resin, a resin having a high melting point that does not melt when conducting heat from the battery cell 10 which is an example of a heat source is preferable. For example, polyphenylene sulfide (PPS), polyether ether ketone (PEEK), A polyamide imide (PAI) etc. can be mentioned suitably. The resin is dispersed, for example, in the form of particles in the gaps between the carbon fillers before the heat conductive sheet 2 is molded. In addition to the carbon filler and the resin, the heat conductive sheet 2 may be dispersed with AlN or diamond as a filler for further enhancing heat conduction. In place of the resin, an elastomer that is more flexible than the resin may be used.
　熱伝導シート２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。 The heat conductive sheet 2 can also be a sheet containing metal and / or ceramics instead of or together with carbon as described above. As the metal, a metal having a relatively high thermal conductivity such as aluminum, copper, or an alloy containing at least one of them can be selected. Moreover, as ceramics, those having relatively high thermal conductivity such as AlN, cBN, hBN, and the like can be selected.
　熱伝導シート２は、導電性に優れるか否かは問わない。熱伝導シート２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２は、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２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、０．０５～５ｍｍが好ましく、０．０６５～０．５ｍｍがより好ましい。ただし、熱伝導シート２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 2 is excellent in conductivity. The thermal conductivity of the heat conductive sheet 2 is preferably 10 W / mK or more. In this embodiment, the heat conductive sheet 2 is a strip-shaped plate of aluminum, an aluminum alloy, copper or stainless steel, and is made of a material having excellent heat conductivity and conductivity. The heat conductive sheet 2 is preferably a sheet having excellent curvature (or flexibility), and the thickness thereof is not limited, but is preferably 0.05 to 5 mm, and more preferably 0.065 to 0.5 mm. However, since the thermal conductivity of the heat conductive sheet 2 decreases as the thickness increases, the thickness is determined by comprehensively considering the strength, flexibility and thermal conductivity of the sheet. preferable.
（３）クッション部材
　クッション部材３の重要な機能は変形容易性と回復力である。変形容易性は、バッテリーセル１０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１０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３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 3 are ease of deformation and resilience. Deformability is a characteristic necessary for following the shape of the battery cell 10, and in particular, a semi-solid material such as a lithium ion battery, contents having liquid properties, etc. are contained in a package that is easily deformed. In the case of the battery cell 10, there are many cases where the design dimensions are indefinite or the dimensional accuracy cannot be increased. For this reason, holding | maintenance of the recovery force for hold | maintaining the deformation | transformation ease and follow-up force of the cushion member 3 is important.
　本実施形態において、クッション部材３は、図２Ｂに示すように、貫通路３１を備える筒状クッション部材である。クッション部材３は、複数のバッテリーセル１０の下端部が平坦でない場合でも、熱伝導シート２と当該下端部との接触を良好にする。さらに、貫通路３１は、クッション部材３の変形を容易にするのに寄与し、熱伝導シート２とバッテリーセル１０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３は、バッテリーセル１０と底部２２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２に加わる荷重によって熱伝導シート２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３は、熱伝導シート２に比べて低熱伝導性の部材である。 In this embodiment, the cushion member 3 is a cylindrical cushion member provided with a through-passage 31 as shown in FIG. 2B. Even when the lower end portions of the plurality of battery cells 10 are not flat, the cushion member 3 makes good contact between the heat conductive sheet 2 and the lower end portions. Further, the through passage 31 contributes to facilitating the deformation of the cushion member 3 and has a function of increasing the contact between the heat conductive sheet 2 and the lower end portion of the battery cell 10. The cushion member 3 is provided between the battery cell 10 and the bottom portion 22 and has a function as a protective member that prevents the heat conductive sheet 2 from being damaged by a load applied to the heat conductive sheet 2 in addition to the function of exerting cushioning properties. Have. In this embodiment, the cushion member 3 is a member having low thermal conductivity as compared to the thermal conductive sheet 2.
　クッション部材３は、貫通路３１から径方向外側に向かって、第１クッション部材３２、第２クッション部材３３の順に構成された二重構造の筒状部材である。第１クッション部材３２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。第１クッション部材３２は、熱伝導シート２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。本実施形態では、第１クッション部材３２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。第２クッション部材３３は、第１クッション部材３２に比べて熱伝導性が高い材料で構成される。具体的には、第２クッション部材３３は、その熱伝導性を高めるために、上述のようなゴム中に、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る。本実施形態では、第２クッション部材３３は、バッテリーセル１０からの熱を速やかに熱伝導シート２に伝える必要から、より好ましくは、熱伝導性に優れたシリコーンゴムに、当該フィラーを分散して構成される。第２クッション部材３３は、その厚さに制約はないが、０．３～５ｍｍが好ましく、０．３～１ｍｍがより好ましい。ただし、第２クッション部材３３の熱伝導率は、その厚さが増加するほど低下する。また、フィラーを含有する第２クッション部材３３は、フィラーを含有しない第１クッション部材３２に比べてゴムの柔軟性が低下する。そのため、バッテリーセル１０表面の凹凸あるいはゴム硬度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。 The cushion member 3 is a double-structured cylindrical member configured in the order of the first cushion member 32 and the second cushion member 33 from the through passage 31 toward the radially outer side. The first cushion member 32 is preferably a thermosetting 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); It is configured to include thermoplastic elastomers such as urethane, ester, styrene, olefin, butadiene, and fluorine, or composites thereof. The first cushion member 32 is preferably made of a material having high heat resistance that can maintain its form without being melted or decomposed by heat transmitted through the heat conductive sheet 2. In the present embodiment, the first cushion member 32 is more preferably made of a urethane elastomer impregnated with silicone or silicone rubber. The second cushion member 33 is made of a material having higher thermal conductivity than the first cushion member 32. Specifically, the second cushion member 33 is configured by dispersing fillers typified by AlN, cBN, hBN, diamond particles, and the like in the rubber as described above in order to increase its thermal conductivity. The In the present embodiment, since the second cushion member 33 needs to quickly transfer the heat from the battery cell 10 to the heat conductive sheet 2, more preferably, the filler is dispersed in silicone rubber having excellent heat conductivity. Composed. The thickness of the second cushion member 33 is not limited, but is preferably 0.3 to 5 mm, and more preferably 0.3 to 1 mm. However, the thermal conductivity of the second cushion member 33 decreases as the thickness increases. In addition, the second cushion member 33 containing the filler is less flexible than the first cushion member 32 not containing the filler. For this reason, it is preferable to determine the thickness of the battery cell 10 in consideration of the unevenness of the surface of the battery cell 10 or rubber hardness and thermal conductivity.
　本実施形態のクッション部材３は、第２クッション部材３３にのみフィラーが分散されて構成されているので、第１クッション部材３２及び第２クッション部材３３ともにフィラーが分散されている場合に比べて、製造コストを抑えることができるとともに、ゴムの柔軟性の低下を抑制することができる。クッション部材３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。 Since the cushion member 3 of the present embodiment is configured such that the filler is dispersed only in the second cushion member 33, compared to the case where the filler is dispersed in both the first cushion member 32 and the second cushion member 33, The manufacturing cost can be suppressed, and the decrease in flexibility of the rubber can be suppressed. The cushion member 3 may be one that does not include bubbles in addition to the one that includes bubbles therein. Further, the “cushion member” means a member that is rich in flexibility and can be deformed so as to be in close contact with the surface of the heat source. In this sense, it can be read as “rubber-like elastic body”.
　図３は、バッテリーセルの直下に放熱構造体を配置する状態の斜視図を示す。 FIG. 3 is a perspective view showing a state in which the heat dissipating structure is arranged directly below the battery cell.
　バッテリーセル１０は、放熱構造体１と接する側と反対側（図１，３では上方）に、電極１１，１２を備える。放熱構造体１は、熱伝導シート２上に、バッテリーセル１０の長手方向（図３の奥行き方向）に平行に複数のクッション部材３が配置されている。なお、ここでは、熱伝導シート２上に１０個のクッション部材３が配置されているが、熱伝導シート２に配置されるクッション部材３の個数は１０個に限定されない。また、放熱構造体１に配置されるバッテリーセル１０の個数についても、特に限定されない。 The battery cell 10 includes electrodes 11 and 12 on the side opposite to the side in contact with the heat dissipation structure 1 (upward in FIGS. 1 and 3). In the heat dissipation structure 1, a plurality of cushion members 3 are arranged on the heat conductive sheet 2 in parallel with the longitudinal direction of the battery cell 10 (the depth direction in FIG. 3). Here, ten cushion members 3 are disposed on the heat conductive sheet 2, but the number of cushion members 3 disposed on the heat conductive sheet 2 is not limited to ten. Further, the number of battery cells 10 arranged in the heat dissipation structure 1 is not particularly limited.
　図１Ａおよび図１Ｂに示すように、筐体２１内の放熱構造体１は、バッテリーセル１０の電極１１，１２と反対側に位置する下端部と接触し、当該下端部と筐体２１の底部２２との間で、上下方向に圧縮された状態となる。この状態において、図１Ｂに示すように、クッション部材３が変形するため、バッテリーセル１０の下端部と熱伝導シート２との接触が良好になる。バッテリー２０の充電若しくは放電時に発する熱は、バッテリーセル１０の下端部からクッション部材３、熱伝導シート２、筐体２１の底部２２、冷却部材２６へと伝わる。こうして、バッテリーセル１０の効果的な除熱が実現する。なお、放熱構造体１は、クッション部材３をバッテリーセル１０側に、熱伝導シート２を冷却部材２６側（底部２２側と称しても良い）にそれぞれ向けて筐体２１内に配置されても良い。 As shown in FIG. 1A and FIG. 1B, the heat dissipation structure 1 in the housing 21 is in contact with the lower end located on the opposite side of the electrodes 11, 12 of the battery cell 10, and the lower end and the bottom of the housing 21. 22 is compressed in the vertical direction. In this state, as shown in FIG. 1B, since the cushion member 3 is deformed, the contact between the lower end portion of the battery cell 10 and the heat conductive sheet 2 is improved. Heat generated during charging or discharging of the battery 20 is transmitted from the lower end of the battery cell 10 to the cushion member 3, the heat conductive sheet 2, the bottom 22 of the housing 21, and the cooling member 26. Thus, effective heat removal of the battery cell 10 is realized. The heat dissipation structure 1 may be disposed in the housing 21 with the cushion member 3 facing the battery cell 10 and the heat conductive sheet 2 facing the cooling member 26 (may be referred to as the bottom 22 side). good.
（実施形態の作用・効果）
　以上説明したように、放熱構造体１は、バッテリー２０と冷却部材２６との間にあってバッテリー２０から冷却部材２６に熱を伝導させてバッテリー２０からの放熱を可能とするものであって、金属、炭素若しくはセラミックスの少なくとも１つを含み、バッテリー２０と冷却部材２６との間に配置可能な熱伝導シート２と、バッテリー２０と熱伝導シート２との間に備えられ、熱伝導シート２に比べてバッテリー２０の表面形状に合わせて変形容易なクッション部材３と、を備える。また、クッション部材３は、ゴム状弾性体に、ゴム状弾性体より熱伝導性の高いフィラーを含有する。 (Operation and effect of the embodiment)
As described above, the heat dissipation structure 1 is located between the battery 20 and the cooling member 26 and conducts heat from the battery 20 to the cooling member 26 to enable heat dissipation from the battery 20. A heat conductive sheet 2 that includes at least one of carbon or ceramics and can be disposed between the battery 20 and the cooling member 26, and is provided between the battery 20 and the heat conductive sheet 2, as compared with the heat conductive sheet 2. A cushion member 3 that can be easily deformed in accordance with the surface shape of the battery 20. The cushion member 3 contains a filler having higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body.
　このため、従来のような金属性の放熱フィン等に比べて、軽量になり、かつ、放熱構造体１の周辺に配置される部品の損傷を抑制することができる。また、クッション部材３に起因して、バッテリーセル２０の種々の形態に順応可能となる。 For this reason, it is lighter than conventional metal heat dissipating fins and the like, and damage to components arranged around the heat dissipating structure 1 can be suppressed. Further, due to the cushion member 3, the battery cell 20 can be adapted to various forms.
　また、クッション部材３は、その長さ方向に貫通する貫通路３１を有する筒状クッション部材である。このため、クッション部材３の変形容易性が高められ、複数のバッテリーセル１０の下端部が平坦でない場合でも、熱伝導シート２と当該下端部との接触を良好にできる。また、放熱構造体１は貫通路３１に起因してより軽量となる。 Further, the cushion member 3 is a cylindrical cushion member having a through passage 31 penetrating in the length direction. For this reason, the deformability of the cushion member 3 is improved, and even when the lower end portions of the plurality of battery cells 10 are not flat, the contact between the heat conductive sheet 2 and the lower end portion can be improved. Further, the heat dissipation structure 1 is lighter due to the through passage 31.
　また、クッション部材３は、第１クッション部材３２と、第１クッション部材３２の外側面を覆う第２クッション部材３３と、を備え、第２クッション部材３３は、第１クッション部材３１に比べて熱伝導性が高い。具体的には、第１クッション部材３２はゴム状弾性体で形成され、第２クッション部材は、ゴム状弾性体より熱伝導性の高いフィラーを含有するゴム状弾性体で形成されている。このため、バッテリー２０の充電若しくは放電時に発する熱は、バッテリーセル１０から熱伝導シート２への熱伝導性をより高めることができる。また、フィラーを含有しない第１クッション部材３２を第２クッション部材３３の内側に設けることにより、クッション部材の変形容易性の低下を抑制することができる。 In addition, the cushion member 3 includes a first cushion member 32 and a second cushion member 33 that covers the outer surface of the first cushion member 32, and the second cushion member 33 is more heated than the first cushion member 31. High conductivity. Specifically, the first cushion member 32 is formed of a rubber-like elastic body, and the second cushion member is formed of a rubber-like elastic body containing a filler having higher thermal conductivity than the rubber-like elastic body. For this reason, the heat generated when the battery 20 is charged or discharged can further increase the thermal conductivity from the battery cell 10 to the heat conductive sheet 2. Moreover, by providing the 1st cushion member 32 which does not contain a filler inside the 2nd cushion member 33, the fall of the deformability of a cushion member can be suppressed.
　また、クッション部材３は、熱伝導シート２上に複数個設けられているため、熱伝導シート２上のクッション部材の表面積が大きくなり、バッテリーセル１０の効果的な除熱が実現する。 Further, since the cushion member 3 is provided in plural on the heat conductive sheet 2, the surface area of the cushion member on the heat conductive sheet 2 is increased, and effective heat removal of the battery cell 10 is realized.
（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. However, the present invention is not limited thereto, and various modifications can be made.
　例えば、熱源は、バッテリーセル１０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２６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１等は、バッテリー２０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 10 but also all objects that generate heat, such as a circuit board and an electronic device main body. For example, the heat source may be an electronic component such as a capacitor and an IC chip. Similarly, the cooling member 26 may be not only cooling water but also an organic solvent, liquid nitrogen, or cooling gas. Further, the heat dissipation structure 1 or the like may be disposed in a structure other than the battery 20 or the like, for example, an electronic device, a home appliance, a power generation device, or the like.
　また、本発明の放熱構造体１は、バッテリーセル１０のみならず、多種多様な形状の熱源に採用可能である。図４は、円柱形状の熱源に本発明の放熱構造体を採用した場合における縦断面図を示す。図４に示すように、円柱形状の熱源４０に本発明の放熱構造体１を採用する場合、熱伝導シート２のうちクッション部材３が配置されている面と反対側の面を、熱源４０に巻きつけ、クッション部材３が配置されている面を冷却部材に圧接することにより、熱源４０の効果的な除熱が実現可能となる。 Further, the heat dissipation structure 1 of the present invention can be used not only for the battery cell 10 but also for heat sources having various shapes. FIG. 4 shows a longitudinal sectional view when the heat dissipation structure of the present invention is adopted as a cylindrical heat source. As shown in FIG. 4, when the heat dissipating structure 1 of the present invention is employed in a columnar heat source 40, the surface opposite to the surface on which the cushion member 3 is disposed in the heat conductive sheet 2 is used as the heat source 40. By winding and pressing the surface on which the cushion member 3 is disposed to the cooling member, effective heat removal of the heat source 40 can be realized.
　また、上述の実施形態では、熱伝導シート２上に複数のクッション部材３が配置されていたが、熱伝導シート２上に配置されるクッション部材３は１つであっても良い。 In the above-described embodiment, the plurality of cushion members 3 are arranged on the heat conductive sheet 2, but one cushion member 3 may be arranged on the heat conductive sheet 2.
　また、上述の実施形態では、複数のクッション部材３は、熱伝導シート２上に互いに平行に配置されていたが、熱伝導シート２上に非平行に配置されていても良い。 In the above-described embodiment, the plurality of cushion members 3 are arranged in parallel to each other on the heat conductive sheet 2, but may be arranged in non-parallel on the heat conductive sheet 2.
　また、上述の実施形態におけるクッション部材３は、貫通路３１を有する筒状のクッション部材であったが、貫通路３１を有していなくても良い。また、クッション部材３の縦断面形状は円に限定されず、例えば、多角形であっても良い。 Moreover, although the cushion member 3 in the above-described embodiment is a cylindrical cushion member having the through passage 31, the cushion member 3 may not have the through passage 31. Moreover, the longitudinal cross-sectional shape of the cushion member 3 is not limited to a circle, For example, a polygon may be sufficient.
　また、クッション部材３は、貫通路３１に代えて、その長さ方向に窪む凹部を有する棒状クッション部材としても良い。クッション部材３は、その長さ方向における窪みが大きいほど、クッション部材３の変形容易性が高められる。このため、クッション部材３は、貫通路３１の一方の開口部分を塞いだ凹部を有することがより好ましい。 Further, the cushion member 3 may be a rod-like cushion member having a recess recessed in the length direction instead of the through passage 31. The cushion member 3 is more easily deformable as the depression in the length direction is larger. For this reason, it is more preferable that the cushion member 3 has a recess that blocks one opening portion of the through passage 31.
　また、上述の実施形態におけるクッション部材３は、第１クッション部材３２と第２クッション部材３３とからなる二重構造であったが、第２クッション部材３３のみで形成されていても良い。また、クッション部材３は三重構造以上の多重構造であっても良い。かかる場合、クッション部材３は、径方向外側に向かって、より熱伝導性の高い部材を採用することが好ましい。 Moreover, although the cushion member 3 in the above-described embodiment has a double structure including the first cushion member 32 and the second cushion member 33, the cushion member 3 may be formed of only the second cushion member 33. Further, the cushion member 3 may have a multiple structure of a triple structure or more. In such a case, it is preferable that the cushion member 3 employs a member having higher thermal conductivity toward the radially outer side.
　また、上述の実施形態における第１クッション部材３２は、シリコーンゴム等のフィラーを含まないゴム状弾性体であったが、第２クッション部材３３と同様に、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。かかる場合、第１クッション部材３２に含有されるフィラーの量は、第２クッション部材３３に含有されるフィラーの量より少なくなるように構成されることが好ましい。 Moreover, although the 1st cushion member 32 in the above-mentioned embodiment was a rubber-like elastic body which does not contain fillers, such as silicone rubber, similarly to the 2nd cushion member 33, in a rubber | gum, AlN, cBN, hBN, A filler represented by diamond particles or the like may be dispersed. In such a case, the amount of filler contained in the first cushion member 32 is preferably configured to be smaller than the amount of filler contained in the second cushion member 33.
　また、上述の実施形態では、第１クッション部材３２と第２クッション部材３３とは、フィラーの含有量により熱伝導性の差異を生じさせていたが、含有するフィラーの種類、または、クッション部材３の材質により熱伝導性の差異を生じさせても良い。例えば、第２クッション部材３３に含有されるフィラーが、第１クッション部材３２に含有されるフィラーより熱伝導性の高いフィラーであっても良い。また、第２クッション部材３３が第１クッション部材３２より熱伝導性の高い材質から構成されるようにクッション部材３が形成されていても良い。また、クッション部材３の表面および／または熱伝導シート２の表面であって熱源若しくは冷却部材２６に接触する面側に、柔軟性の高いゴムシートを介在させても良い。ただし、その場合、当該ゴムシートの厚さを小さくする方が放熱構造体１の熱伝導性を高く維持できるので、好ましい。 Moreover, in the above-mentioned embodiment, although the 1st cushion member 32 and the 2nd cushion member 33 produced the difference in heat conductivity with content of a filler, the kind of filler to contain or the cushion member 3 A difference in thermal conductivity may be caused depending on the material. For example, the filler contained in the second cushion member 33 may be a filler having higher thermal conductivity than the filler contained in the first cushion member 32. Further, the cushion member 3 may be formed so that the second cushion member 33 is made of a material having higher thermal conductivity than the first cushion member 32. Further, a highly flexible rubber sheet may be interposed on the surface of the cushion member 3 and / or the surface of the heat conductive sheet 2 that contacts the heat source or the cooling member 26. However, in that case, it is preferable to reduce the thickness of the rubber sheet because the thermal conductivity of the heat dissipation structure 1 can be maintained high.
　本発明に係る放熱構造体は、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。また、本発明に係るバッテリーは、自動車用のバッテリー以外に、家庭用の充放電可能なバッテリー、ＰＣ等の電子機器用のバッテリーにも利用できる。 The heat dissipating structure according to the present invention can be used, for example, in various electronic devices such as automobiles, industrial robots, power generation devices, PCs, and household appliances in addition to automobile batteries. Further, the battery according to the present invention can be used for a battery for home use and a battery for an electronic device such as a PC, in addition to a battery for an automobile.

Claims (12)

  1. 　熱源と冷却部材との間にあって前記熱源から前記冷却部材に熱を伝導させて前記熱源からの放熱を可能とする放熱構造体であって、
    　金属、炭素若しくはセラミックスの少なくとも１つを含み、前記熱源と前記冷却部材との間に配置可能な熱伝導シートと、
    　前記熱源と前記熱伝導シートとの間に備えられ、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クッション部材と、
    を備え、
    　前記クッション部材は、ゴム状弾性体に、前記ゴム状弾性体より熱伝導性の高いフィラーを含有することを特徴とする放熱構造体。     A heat dissipation structure between a heat source and a cooling member that conducts heat from the heat source to the cooling member and enables heat dissipation from the heat source,
    A heat conductive sheet that includes at least one of metal, carbon, or ceramics and that can be disposed between the heat source and the cooling member;
    A cushion member provided between the heat source and the heat conductive sheet, and easily deformable in accordance with the surface shape of the heat source compared to the heat conductive sheet;
    With
    The said cushion member contains the filler whose heat conductivity is higher than the said rubber-like elastic body in a rubber-like elastic body, The heat radiating structure characterized by the above-mentioned.
  2. 　前記クッション部材は、その長さ方向に窪む凹部を有する棒状クッション部材であることを特徴とする請求項１に記載の放熱構造体。 The heat dissipation structure according to claim 1, wherein the cushion member is a rod-shaped cushion member having a recess recessed in a length direction thereof.
  3. 　前記凹部は、前記クッション部材をその長さ方向に貫通する貫通路であり、
    　前記クッション部材は、前記貫通路を有する筒状クッション部材であることを特徴とする請求項２に記載の放熱構造体。     The recess is a through path that penetrates the cushion member in the length direction thereof,
    The heat dissipation structure according to claim 2, wherein the cushion member is a cylindrical cushion member having the through passage.
  4. 　前記クッション部材は、
    　第１クッション部材と、
    　前記第１クッション部材の外側面を覆う第２クッション部材と、
    を備え、
    　前記第２クッション部材は、前記第１クッション部材に比べて熱伝導性が高い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。     The cushion member is
    A first cushion member;
    A second cushion member covering an outer surface of the first cushion member;
    With
    The heat dissipation structure according to any one of claims 1 to 3, wherein the second cushion member has higher thermal conductivity than the first cushion member.
  5. 　前記第１クッション部材は、前記ゴム状弾性体で形成され、
    　前記第２クッション部材は、フィラーを含有するゴム状弾性体で形成されていることを特徴とする請求項４に記載の放熱構造体。     The first cushion member is formed of the rubber-like elastic body,
    The heat dissipation structure according to claim 4, wherein the second cushion member is formed of a rubber-like elastic body containing a filler.
  6. 　前記クッション部材は、前記熱伝導シート上に複数個設けられていることを特徴とする請求項１から５のいずれか１項に記載の放熱構造体。 The heat dissipation structure according to any one of claims 1 to 5, wherein a plurality of the cushion members are provided on the heat conductive sheet.
  7. 　冷却部材を接触させる筐体内に、１または２以上の熱源としてのバッテリーセルを備えたバッテリーであって、
    　前記熱源と前記冷却部材との間にあって前記熱源から前記冷却部材に熱を伝導させて前記熱源からの放熱を可能とする放熱構造体を備え、
    　前記放熱構造体は、
    　金属、炭素若しくはセラミックスの少なくとも１つを含み、前記熱源と前記冷却部材との間に配置可能な熱伝導シートと、
    　前記熱源と前記熱伝導シートとの間に備えられ、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クッション部材と、
    を備え、
    　前記クッション部材は、ゴム状弾性体に、前記ゴム状弾性体より熱伝導性の高いフィラーを含有することを特徴とするバッテリー。     A battery having a battery cell as one or more heat sources in a housing in contact with a cooling member,
    A heat dissipating structure is provided between the heat source and the cooling member to conduct heat from the heat source to the cooling member to enable heat dissipation from the heat source,
    The heat dissipation structure is
    A heat conductive sheet that includes at least one of metal, carbon, or ceramics and that can be disposed between the heat source and the cooling member;
    A cushion member provided between the heat source and the heat conductive sheet, and easily deformable in accordance with the surface shape of the heat source compared to the heat conductive sheet;
    With
    The battery is characterized in that the cushion member contains a filler having higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body.
  8. 　前記クッション部材は、その長さ方向に窪む凹部を有する棒状クッション部材であることを特徴とする請求項７に記載のバッテリー。 The battery according to claim 7, wherein the cushion member is a rod-shaped cushion member having a recess recessed in a length direction thereof.
  9. 　前記凹部は、前記クッション部材をその長さ方向に貫通する貫通路であり、
    　前記クッション部材は、前記貫通路を有する筒状クッション部材であることを特徴とする請求項８に記載のバッテリー。     The recess is a through path that penetrates the cushion member in the length direction thereof,
    The battery according to claim 8, wherein the cushion member is a cylindrical cushion member having the through passage.
  10. 　前記クッション部材は、
    　第１クッション部材と、
    　前記第１クッション部材の外側面を覆う第２クッション部材と、
    を備え、
    　前記第２クッション部材は、前記第１クッション部材に比べて熱伝導性が高いことを特徴とする請求項７から９のいずれか１項に記載のバッテリー。     The cushion member is
    A first cushion member;
    A second cushion member covering an outer surface of the first cushion member;
    With
    The battery according to claim 7, wherein the second cushion member has higher thermal conductivity than the first cushion member.
  11. 　前記第１クッション部材は、前記ゴム状弾性体で形成され、
    　前記第２クッション部材は、フィラーを含有するゴム状弾性体で形成されていることを特徴とする請求項１０に記載のバッテリー。     The first cushion member is formed of the rubber-like elastic body,
    The battery according to claim 10, wherein the second cushion member is formed of a rubber-like elastic body containing a filler.
  12. 　前記クッション部材は、前記熱伝導シート上に複数個設けられ、前記筐体内の１または２以上の前記バッテリーセルを載置している請求項７から１１のいずれか１項に記載のバッテリー。
     

          The battery according to any one of claims 7 to 11, wherein a plurality of the cushion members are provided on the heat conductive sheet, and one or more of the battery cells in the casing are placed.


PCT/JP2019/009258 2018-05-29 2019-03-08 Heat dissipation structure and battery WO2019230107A1 (en)

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JP2020080302A (en) * 2018-10-15 2020-05-28 信越ポリマー株式会社 Heat dissipation structure, battery cell assembly, and battery
JP2021141015A (en) * 2020-03-09 2021-09-16 信越ポリマー株式会社 Heat dissipation structure and battery having the same

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