JPWO2019244882A1 - Heat dissipation structure, manufacturing method of heat dissipation structure and battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiating structure which is less dependent on the unevenness of the surface of the heat source, has a high contact area with the heat source, can obtain high heat radiating efficiency, and can reduce the weight of the heat radiating structure, a method for manufacturing the heat radiating structure, and the present invention. Provide a battery with a heat dissipation structure. The present invention is a heat dissipation structure 1 that conducts heat from a heat source 10 to a cooling member 25 to enable heat dissipation from the heat source 10, and includes at least one of metal, carbon, or ceramics, and is a heat source. A first sheet 2 arranged between the 10 and the cooling member 25 and at least one of metal, carbon or ceramics are included, fixed to the surface of the first sheet 2 on the heat source 10 side, and continuous in a predetermined direction. A second sheet 3 having a shape that repeats the unevenness is provided, and the second sheet 3 is provided so that a space 4 is formed between the first sheet 2 and the unevenness. [Selection diagram] FIG. 1A

Description

Cross reference

This application claims priority based on Japanese Patent Application No. 2018-117108 filed in Japan on June 20, 2018, and the contents of 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.

The present invention relates to a heat radiating structure, a method for manufacturing the heat radiating structure, and a battery.

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.

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, cubic boron nitride, or the like, 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-dissipating component (see Patent Document 1).

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 have become widespread in recent years in China as well as in European countries such as France, the Netherlands, and Germany. The spread of electric vehicles has issues such as the development of high-performance batteries and the installation of a large number of charging stations. In particular, it is necessary 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.

Japanese Patent Application Laid-Open No. 2008-24399

In order to further improve the heat dissipation efficiency from the heat source, there is a need for a heat dissipation structure that is less dependent on the unevenness of the surface of the heat source and has a large contact area with the heat source. In addition, weight reduction of the heat dissipation structure is also an important factor.

In order to solve the above problems, the present invention has a heat dissipation structure that is less dependent on the unevenness of the surface of the heat source, has a high contact area with the heat source, can obtain high heat dissipation efficiency, and can reduce the weight of the heat dissipation structure. It is an object of the present invention to provide a body, a method for manufacturing the same, and a battery having the heat dissipation structure.

(1) The heat radiating structure according to the embodiment for achieving the above object is a heat radiating structure capable of conducting heat from a heat source to a cooling member to dissipate heat from the heat source, and is made of metal, carbon, or the like. A first sheet containing at least one of ceramics and arranged between the heat source and the cooling member, and at least one of metal, carbon or ceramics, fixed to the surface of the first sheet on the heat source side. The second sheet is provided with a second sheet having a shape of repeating continuous unevenness in a predetermined direction, and the second sheet is provided so as to form a space between the first sheet and the unevenness. A heat dissipation structure characterized by.

(2) In the heat radiating structure according to another embodiment, preferably, the second sheet is provided with one or more first cuts in a portion forming the space.

(3) The heat radiating structure according to another embodiment preferably includes a first elastic member in the space.

(4) The heat radiating structure according to another embodiment preferably includes a second elastic member between the unevenness of the second sheet and the heat source.

(5) The heat radiating structure according to another embodiment preferably contains at least one of metal, carbon or ceramics, and is fixed to a surface of the second sheet opposite to the first sheet. Equipped with a seat.

(6) The heat radiating structure according to another embodiment is preferably placed on a surface of at least the first sheet and the third sheet opposite to the second sheet in the first sheet and the third sheet. It has one or more second cuts in one or more directions.

(7) In the heat radiating structure according to another embodiment, preferably, the space has a shape long in one direction and has the form of a cylinder having both ends open or a cup having one end open.

(8) The method for manufacturing a heat dissipation structure according to an embodiment is a contact between a rotatable first gear, a second gear that meshes with the first gear and rotates, and the first gear and the second gear. The device including an adhesive coating portion located on the downstream side in the rotation direction of the second gear from the position and a sheet feed portion located on the downstream side in the rotation direction of the second gear from the adhesive coating portion is used. A method of manufacturing any of the heat dissipation structures, wherein the presheet before molding the second sheet is inserted into the contact position from the opposite side of the adhesive application portion with respect to the contact position. The step of feeding the pre-sheet in the traveling direction of the second gear while forming the tooth profile of the second gear, and the portion formed into the tooth profile are brought into contact with the adhesive application portion to bring the molded portion of the second sheet into contact. Includes a step of applying an adhesive to the second sheet, and a step of bringing the adhesive-applied portion of the second sheet obtained by molding the pre-sheet into contact with one side of the first sheet sent from the sheet feed unit. ..

(9) The method for manufacturing a heat dissipation structure according to an embodiment is a contact between a rotatable first gear, a second gear that meshes with the first gear and rotates, and the first gear and the second gear. The device including an adhesive coating portion located on the downstream side in the rotation direction of the second gear from the position and a sheet feed portion located on the downstream side in the rotation direction of the second gear from the adhesive coating portion is used. A method of manufacturing any of the heat dissipation structures, wherein the presheet before molding the second sheet is inserted into the contact position from the opposite side of the adhesive application portion with respect to the contact position. The step of feeding the pre-sheet in the traveling direction of the second gear while forming the tooth profile of the second gear, the step of bringing one side of the first sheet into contact with the adhesive application portion to apply the adhesive, and the above. The step includes a step of bringing the second sheet obtained by molding the pre-sheet into contact with one side of the first sheet sent from the sheet feed unit.

(10) The battery according to the embodiment is a battery having one or two or more battery cells as heat sources in a housing with which the cooling member is in contact, and any of the heat dissipation structures is the battery cell. Intervenes between the cooling member and the cooling member.

According to the present invention, it is difficult to depend on the unevenness of the surface of the heat source, the contact area with the heat source is high, high heat dissipation efficiency can be obtained, and the weight of the heat dissipation structure can be reduced.

FIG. 1A shows a perspective view of a part of the heat radiating structure according to the first embodiment. FIG. 1B shows a perspective view of the heat radiating structure according to the first embodiment compressed in the thickness direction. FIG. 2 is a perspective view showing the positional relationship between the heat radiating structure and the battery cell when the battery cell is used as the heat source. FIG. 3A shows a vertical cross-sectional view of a situation in which the battery according to the first embodiment is assembled. FIG. 3B shows a vertical cross-sectional view of the state after assembling the battery according to the first embodiment. FIG. 4 shows a schematic flow chart of a method for manufacturing a heat radiating structure according to the first embodiment. FIG. 5 shows an example of the apparatus used in the manufacturing method of FIG. FIG. 6 shows a perspective view of a part of the heat radiating structure according to the second embodiment. FIG. 7 is a perspective view showing the positional relationship between the heat radiating structure and the battery cell according to the third embodiment when the battery cell is used as the heat source. FIG. 8 is a perspective view showing the positional relationship between the heat radiating structure and the battery cell according to the fourth embodiment when the battery cell is used as the heat source. FIG. 9 shows a schematic flow chart of a method for manufacturing a heat radiating structure according to a fourth embodiment. FIG. 10 shows an example of the apparatus used in the manufacturing method of FIG. FIG. 11 shows a schematic flow chart of a modified example of the method for manufacturing the heat radiating structure according to the first embodiment. FIG. 12 shows an example of the apparatus used in the manufacturing method of FIG. FIG. 13A shows a modified example of a part of the device of FIG. FIG. 13B shows a modified example of a part of the device of FIG.

1,41,51,61 ... Heat dissipation structure, 2 ... 1st sheet, 3 ... 2nd sheet, 3a ... Presheet, 4 ... Space, 6 ... 1st elastic member , 7 ... 2nd elastic member, 8 ... 3rd sheet, 9 ... 1st notch, 9a ... 2nd notch, 10 ... Battery cell (heat source), 20 ... Battery, 21 ... Housing, 25 ... Cooling member, 30, 80, 90 ... Device, 31 ... 1st gear, 32 ... 2nd gear, 33 ... Adhesive coating part, 34 ... Sheet feed section, 36 ... Contact position.

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.

(First Embodiment)
FIG. 1A shows a perspective view of a part of the heat radiating structure according to the first embodiment. FIG. 1B shows a perspective view of the heat radiating structure according to the first embodiment compressed in the thickness direction.

The heat radiating structure 1 is a heat radiating structure located between the heat source and the cooling member 25 (see FIG. 3A) that conducts heat from the heat source to the cooling member 25 to enable heat dissipation from the heat source, and is made of metal, carbon, or the like. A first sheet 2 containing at least one of ceramics and capable of being arranged between the heat source and the cooling member 25, and at least one of metal, carbon or ceramics, which is fixed to the surface of the first sheet 2 on the heat source side. A second sheet 3 having a shape of repeating continuous unevenness in a predetermined direction is provided. Further, the second sheet 3 is provided so that a space 4 is formed between the first sheet 2 and the unevenness. The first sheet 2 is preferably a flat plate in this embodiment. However, the first sheet 2 may be a wavy plate that repeats peaks and valleys in one direction. The second sheet 3 is a bellows-shaped sheet that repeats linear concave portions and convex portions in a wavy shape to the right of the paper surface of FIG. However, the second sheet 3 may have a shape that repeats continuous unevenness in a plurality of directions. In this embodiment, the number of spaces 4 exists as many as the number of convex portions of the unevenness of the second sheet 3. However, the space 4 may be formed to be smaller than the number of convex portions by communicating two or more of the convex portions, instead of allowing the number of convex portions of the second sheet 3 to exist.

The space 4 has a long shape in one direction (a direction extending to the back of the paper surface in FIG. 1A), and has the form of a cylinder with both ends open. However, the space 4 may have the form of a so-called open-ended cup in which only the front surface side of the paper surface of FIG. 1A is opened and the end surface in the back direction of the paper surface is closed. Further, the space 4 may have a form in which both ends in the length direction thereof are closed.

The heat radiating structure 1 includes a first elastic member 6 in a space 4 formed between the unevenness of the second sheet 3 and the first sheet 2. In this embodiment, the first elastic member 6 is a long elastic member inserted in the space 4. However, the first elastic member 6 may have any shape according to the shape of the space 4. Further, the vertical cross-sectional shape of the first elastic member 6 (cross-sectional shape cut in the vertical direction in FIG. 1A) is not limited to a circle, and may be, for example, a polygon.

The second sheet 3 is connected to the first sheet 2 at the open end of the convex portion (including the bottom of the concave portion). The connection method may be any method such as adhesion, fitting, and fusion. When connecting the second sheet 3 to the first sheet 2 using an adhesive, it is preferable to use an adhesive having excellent heat resistance. The adhesive preferably has excellent thermal conductivity, but may have low thermal conductivity.

The first sheet 2 and the second sheet 3 are made of a material having higher thermal conductivity than the first elastic member 6, regardless of whether or not they are made of the same material. The first sheet 2 and the second sheet 3 are preferably sheets containing carbon, metal and / or ceramics, or a simple substance thereof. The first sheet 2 and / or the second sheet 3 is, in a more preferable form, preferably a sheet containing carbon, and more preferably a sheet containing a carbon filler and a 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 first sheet 2 and / or the second sheet 3 can be a thin sheet obtained by curing a material obtained by blending and dispersing graphite fibers and carbon particles in a resin. Further, the first sheet 2 and / or the second sheet 3 may be carbon fibers knitted in a mesh shape, and may be blended or knitted. Further, the second sheet 3 may be provided with a plurality of one or more first notches 9 along the direction orthogonal to the longitudinal direction of the first elastic member 6 (left-right direction on the paper surface) in the portion forming the space 4. Good (see Figure 1A). Further, the first elastic member 6 may also be provided with a notch at the same position as or close to the first notch 9 in the length direction thereof so as to make a half cut along the side surface thereof. Further, the second sheet 3 may be provided with a plurality of cuts along the longitudinal direction (paper surface depth direction) of the first elastic member 6. Further, the second sheet 3 may be provided with notches in a grid pattern. By making a notch in the second sheet 3 and / or the first elastic member 6, even if each surface on the heat source side and / or the cooling member side has irregularities, the first sheet 2 and the second sheet 3 are said to be the same. It becomes easier to contact the surface. The above-mentioned cut may be any form of cut such as a line-shaped cut or a dot-shaped cut.

When the first sheet 2 and / or the second sheet 3 contains a resin, the resin may exceed 50% by mass or 50% by mass or less with respect to the total mass of the sheets. That is, it does not matter whether or not the first sheet 2 and / or the second sheet 3 uses resin as the main material as long as there is no significant hindrance to heat conduction. As the resin, for example, a thermoplastic resin can be preferably used. As the thermoplastic resin, a resin having a high melting point that does not melt when conducting heat from a heat source is preferable, and for example, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyamide (PA), and polyamideimide. (PAI) and the like can be preferably mentioned. The resin is dispersed in the gaps between the carbon fillers, for example, in the form of particles in the state before molding of the first sheet 2 and / or the second sheet 3. In addition to the carbon filler and the resin, AlN or diamond may be dispersed in the first sheet 2 and / or the second sheet 3 as a filler for further enhancing heat conduction. Further, instead of the resin, an elastomer that is more flexible than the resin may be used.

The first sheet 2 and / or the second sheet 3 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.

It does not matter whether the first sheet 2 and / or the second sheet 3 is excellent in conductivity. The thermal conductivity of the sheets 2 and 3 is preferably 10 W / mK or more. When the first sheet is a carbon-containing sheet, the second sheet 3 can also be a metal sheet. The preferred second sheet 3 is a sheet made of aluminum, aluminum alloy, copper or stainless steel. The second sheet 3 is preferably a sheet that is easily curved (or bent), and its thickness is not limited, but is preferably 0.05 to 5 mm, more preferably 0.065 to 0.5 mm.

The first elastic member 6 is a tubular elastic member provided with a gangway 61. The first elastic member 6 improves the contact between the second sheet 3 and the lower end portion even if the lower end portions of the plurality of heat sources have irregularities. Further, the gangway 61 has a function of contributing to facilitating the deformation of the first elastic member 6 and enhancing the contact between the second sheet 3 and the lower end portion of the heat source. The first elastic member 6 has a function of exerting a cushioning property between the heat source and the bottom portion 22, and also has a function of a protective member for preventing the second sheet 3 from being damaged by a load applied to the second sheet 3. Have. In this embodiment, the first elastic member 6 is a member having a lower thermal conductivity than the first sheet 2 and / or the second sheet 3.

The first elastic member 6 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); It is configured to contain thermoplastic elastomers such as urethane-based, ester-based, styrene-based, olefin-based, butadiene-based, and fluorine-based, or composites thereof. The first elastic member 6 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 first sheet 2 and the second sheet 3. In this embodiment, the first elastic member 6 is more preferably composed of a urethane-based elastomer impregnated with silicone or silicone rubber. The first elastic member 6 may be configured by dispersing fillers typified by AlN, cBN, hBN, diamond particles, etc. in rubber in order to increase its thermal conductivity as much as possible. The first elastic member 6 may contain air bubbles or may not contain air bubbles. Further, the "elastic member" means a member having high flexibility and capable of elastically repeating compression and expansion, and in this sense, it can be read as "rubber-like elastic body".

When the heat radiating structure 1 receives a compressive force in the thickness direction from the second sheet 3 to the first sheet 2, the heat radiating structure 1 is in the state shown in FIG. 1B. That is, the uneven structure of the second sheet 3 is crushed, and the first elastic member 6 in the space 4 becomes flat. The second sheet 3 has a shape that repeats unevenness, and can be deformed so that the convex portion falls toward the concave portion next to the convex portion. When no compressive force is applied in the thickness direction of the heat radiating structure 1, the first sheet 2 is in contact with the second sheet 3 only at the open end. However, when the compressive force is applied, the first sheet 2 comes into contact with a portion other than the open end of the second sheet 3. As a result, the thermal conductivity between the first sheet 2 and the second sheet 3 becomes higher. The first elastic member 6 in the space 4 has a role of making it easy for the heat source to come into contact with the first sheet 2 and the second sheet 3 even if the surface of the heat source has irregularities.

FIG. 2 is a perspective view showing the positional relationship between the heat radiating structure and the battery cell when the battery cell is used as the heat source.

As shown in FIG. 2, the first sheet 2 of the heat dissipation structure 1 is in contact with the bottom of the housing in which the battery cell 10 as an example of the heat source is arranged. The second sheet 3 comes into contact with the lower end portion of the plurality of battery cells 10 located on the opposite side of the electrodes 11 and 12. When the battery cell 10 is arranged on the second sheet 3 side, the heat radiating structure 1 is compressed and is in the state shown in FIG. 1B. In FIG. 2, only eight battery cells 10 are shown in order to avoid complication of the figure. However, the number of battery cells 10 can be increased to more than eight depending on the specifications of the battery and the required power. The size of the heat radiating structure 1 can also be arbitrarily changed according to the number of battery cells 10.

FIG. 3A shows a vertical cross-sectional view of a situation in which the battery according to the first embodiment is assembled. FIG. 3B shows a vertical cross-sectional view of the state after assembling the battery according to the first embodiment. In the present application, the "cross section" or "vertical cross section" means a cross section in the inner 24 of the housing 21 of the battery 20 in the direction of vertically cutting from the upper opening surface to the bottom portion 22.

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 housing 21 that opens to one side. The housing 21 is preferably made of aluminum or an aluminum-based alloy. The battery cell 10 is arranged inside 24 of the housing 21. An electrode is provided above the battery cell 10 so as to project. The plurality of battery cells 10 are preferably brought into close contact with each other in the housing 21 by applying a force in the direction of compression from both sides thereof using screws or the like (not shown). The bottom 22 of the housing 21 is provided with one or more water cooling pipes 26 for flowing cooling water, which is an example of the cooling member 25. The battery cell 10 is arranged in the housing 21 so as to sandwich the heat radiating structure 1 with the bottom portion 22.

The battery 20 includes a battery cell 10 as one or more heat sources in a housing 21 having a structure for flowing a cooling member 25. The heat radiating structure 1 is interposed between the battery cell 10 and the cooling member 25. In this embodiment, the heat radiating structure 1 is preferably arranged with the first sheet 2 facing the cooling member 25 side and the second sheet 3 facing the battery cell 10 side. In the battery 20 having such a structure, the battery cell 10 transfers heat to the housing 21 through the heat radiating structure 1 and is effectively removed by water cooling. The cooling member 25 is not limited to cooling water, but is interpreted to include an organic solvent such as liquid nitrogen and ethanol. The cooling member 25 is not limited to a liquid under the conditions used for cooling, and may be a gas or a solid.

When the battery cell 10 is set in the housing 21 (see FIG. 3B), the heat radiation structure 1 has a thickness of the heat radiation structure 1 between the battery cell 10 and the bottom portion 22 provided with the water cooling pipe 26. Compressed in the direction (see FIG. 1B). The second sheet 3 comes into contact with the first sheet 2 in the form of tilting the space 4 having the first elastic member 6 or crushing the space 4. As a result, the heat from the battery cell 10 is easily transferred to the second sheet 3, the first sheet 2, the bottom 22, the water cooling pipe 26, and the cooling member 25. The first elastic member 6 contributes to making it easier for the battery cell 10 to come into contact with the second sheet 3 and the first sheet 2 even if there is a step between the battery cells 10.

FIG. 4 shows a schematic flow chart of a method for manufacturing a heat radiating structure according to the first embodiment. FIG. 5 shows an example of the apparatus used in the manufacturing method of FIG.

The method for manufacturing the heat radiating structure 1 according to the first embodiment includes a pre-sheet insertion step (S100), a pre-sheet molding step (S110), an adhesive application step (S120), and first sheet 2 and second sheet 3. This is a method in which the steps are performed in the order of the contact step (S130). As the apparatus 30 used in the manufacturing method, various apparatus can be adopted, but it is preferable to use a single facer. More specifically, the device 30 is second from the contact position 36 between the rotatable first gear 31, the second gear 32 that meshes with the first gear 31 and rotates, and the first gear 31 and the second gear 32. An adhesive coating portion 33 located on the downstream side in the rotation direction of the gear 32 and a sheet feed portion 34 located on the downstream side in the rotation direction of the second gear 32 from the adhesive coating portion 33 are provided. Here, the “downstream” means the rotation direction of the second gear 32 at the contact position 36 and the downstream side in the direction of feeding the presheet 3a. The same applies to the subsequent "downstream". The sheet feed unit 34 is a means for transporting the first sheet 2 along the surface thereof. The sheet feed unit 34 has, for example, a belt transport unit having a belt that drives the first sheet 2 in the direction of the dotted arrow, or a dotted line on the first sheet 2 by rotation of the second gear 32 without any driving means. It may be a non-driven transport unit that moves in the direction of the arrow. Further, the sheet feeding unit 34 may be a means for transporting the first sheet 2 by a roller. Hereinafter, each step will be described with reference to FIG.

(1) Pre-sheet insertion step (S100)
The insertion step is a step of inserting the pre-sheet 3a before molding the second sheet 3 into the contact position 36 from the opposite side of the adhesive application portion 33 with respect to the contact position 36 (insertion in the direction of arrow A). .. The first gear 31 rotates by a driving means such as a motor (rotates in the direction of the solid arrow in the first gear 31). The second gear 32 meshes with the first gear 31 and is driven by the first gear 31 (following the direction of the solid arrow in the second gear 32).

(2) Presheet molding step (S110)
The molding step is a step of feeding the presheet 3a in the traveling direction of the second gear 32 while forming the tooth profile of the second gear 32. More specifically, the presheet 3a is formed by being sandwiched between the first gear 31 and the second gear 32, and heads toward the adhesive application portion 33 while adhering to the surface of the second gear 32. The presheet 3a is formed so as to transfer the tooth profile of the second gear 32 at the contact position 36 in the pre-stage of the adhesive application portion 33. As a result, the pre-sheet 3a is formed into the second sheet 3.

(3) Adhesive application step (S120)
The coating step is a step of bringing the tooth-shaped portion of the second sheet 3 into contact with the adhesive coating portion 33 and applying the adhesive to the molded portion of the second sheet 3. The adhesive coating portion 33 preferably has the shape of a roller and rotates on its axis by a driving means such as a motor or is driven by another rotating member such as the second gear 32 (in the adhesive coating portion 33). Rotate in the direction of the solid arrow). The adhesive application portion 33 preferably includes an adhesive holding portion 35 that holds an adhesive on its surface. The gap 37 between the second gear 32 and the adhesive application portion 33 has a width that allows the molded second sheet 3 to pass through with the adhesive attached. The adhesive application portion 33 is not limited to a member having the shape of a roller, and may be, for example, a flat plate holding an adhesive, a container storing the adhesive, or a brush holding the adhesive.

(4) Contact step between the first sheet and the second sheet (S130)
The contact step between the first sheet and the second sheet is an adhesive of the second sheet 3 obtained by molding the pre-sheet 3a on one side of the first sheet 2 (conveyed in the direction of arrow B) sent from the sheet feed unit 34. This is the step of bringing the coated parts into contact with each other. "Contact" may be read as joining or bonding. The same applies to the subsequent "contact". The first sheet 2 is conveyed along the surface 38 of the sheet feeding portion 34 (in the direction of the dotted arrow near the surface 38). The sheet feed portion 34 is arranged with a gap 39 between the surface 38 and the second gear 32. The surface 38 is a surface on which the first sheet 2 can be smoothly conveyed. The gap 39 is formed with a width that allows the first sheet 2 to pass through with the second sheet 3 adhered to the first sheet 2.

The pre-heat dissipation structure 1a sandwiched between the sheet feed portion 34 and the second gear 32 and conveyed downstream does not include the first elastic member 6 and does not include the first notch 9. , It has the same form as the heat dissipation structure 1. After that, when the first elastic member 6 is arranged in the space 4 and the first notch 9 is made so as to make a half cut along the direction orthogonal to the longitudinal direction of the first elastic member 6 (the left-right direction on the paper surface), the heat dissipation structure is formed. Body 1 is completed.

The adhesive application portion 33 may be arranged in the vicinity of the sheet feed portion 34. In this case, the adhesive is applied to one side of the first sheet 2. In that case, the adhesive application step (S120) is a step of bringing one side of the first sheet 2 into contact with the adhesive application portion 33 to apply the adhesive. Further, in the contact step (S130) between the first sheet and the second sheet, a pre-sheet is formed on one side (that is, the surface to which the adhesive is applied) of the first sheet 2 sent from the sheet feed unit 34. This is the step of bringing the second sheet into contact.

Further, the pre-sheet 3a may be a sheet in which the first notches 9 along the left-right direction of the paper surface of FIG. 5 are provided at predetermined intervals in the left-right direction of the paper surface and the depth direction of the paper surface, respectively. In such a case, the pre-heat dissipation structure 1a manufactured by the device 30 has the same form as the heat dissipation structure 1 except that the first elastic member 6 is not provided. After that, when the first elastic member 6 is arranged in the space 4, the heat radiation structure 1 is completed.

(Second Embodiment)
Next, the second embodiment of the present invention will be described. The same reference numerals are given to the parts common to the first embodiment, and duplicate description will be omitted.

FIG. 6 shows a perspective view of a part of the heat radiating structure according to the second embodiment.

The heat radiating structure 41 according to the second embodiment is different from the heat radiating structure 1 according to the first embodiment in that the space 4 is not provided with the first elastic member 6 and the first notch 9 is not provided. Different, other than those are common.

Similar to the first embodiment, when the battery cell 10 is set in the housing 21, the heat radiating structure 41 is a heat radiating structure 41 between the battery cell 10 and the bottom portion 22 provided with the water cooling pipe 26. It is compressed in the thickness direction (see FIG. 3B). The second sheet 3 comes into contact with the first sheet 2 in a form in which the space 4 is knocked down or the space 4 is crushed. As a result, the heat from the battery cell 10 is easily transferred to the second sheet 3, the first sheet 2, the bottom 22, the water cooling pipe 26, and the cooling member 25. Since the heat radiating structure 41 according to the second embodiment does not have the first elastic member 6, the heat radiating structure can be further reduced in weight. For a heat source having relatively small surface irregularities, the heat dissipation structure 41 according to the second embodiment can sufficiently absorb the surface irregularities of the heat source. Therefore, the contact area with the heat source is increased, high heat dissipation efficiency can be obtained, and the weight of the heat dissipation structure can be reduced.

Further, in the second embodiment, the second sheet 3 may be provided with a plurality of cuts along the left-right direction of the paper surface or the depth direction of the paper surface as in the first embodiment (see FIG. 1A). Further, the second sheet 3 may be provided with notches in a grid pattern.

(Third Embodiment)
Next, a third embodiment of the present invention will be described. The same reference numerals are given to the parts common to the first embodiment, and duplicate description will be omitted.

FIG. 7 is a perspective view showing the positional relationship between the heat radiating structure and the battery cell according to the third embodiment when the battery cell is used as the heat source.

The heat radiating structure 51 according to the third embodiment has a point that the space 4 does not have the first elastic member 6, a point that the recess 5 of the second sheet 3 has a second elastic member 7, and a second sheet 3. Unlike the heat radiating structure 1 according to the first embodiment, the heat radiating structure 1 according to the first embodiment is common in that the first notch 9 is not provided.

As shown in FIG. 7, the heat radiating structure 51 includes a second elastic member 7 in the recess 5 of the second sheet 3. The second elastic member 7 is a tubular elastic member provided with a gangway 71. When a battery cell is used as the heat source, in the heat radiating structure 51, the first sheet 2 is in contact with the bottom of the housing in which the battery cell 10 is arranged, and the second sheet 3 is a plurality of batteries, as in the first embodiment. It comes into contact with the lower end of the cell 10 located on the opposite side of the electrodes 11 and 12. The recess 5 is a space formed between the unevenness of the second sheet 3 and the battery cell 10. The second elastic member 7 is an elastic member configured in the same manner as the first elastic member 6.

When the heat radiating structure 51 receives a compressive force in the thickness direction from the second sheet 3 to the first sheet 2, the uneven structure of the second sheet 3 is crushed and the second elastic member is crushed as in the first embodiment. 7 becomes flat. The second sheet 3 has a shape that repeats unevenness, and can be deformed so that the convex portion falls toward the concave portion 5 next to the convex portion. When no compressive force is applied in the thickness direction of the heat radiating structure 51, the first sheet 2 is in contact with the second sheet 3 only at the open end. However, when the compressive force is applied, the first sheet 2 comes into contact with a portion other than the open end of the second sheet 3. As a result, the thermal conductivity between the first sheet 2 and the second sheet 3 becomes higher. The second elastic member 7 in the recess 5 has a role of making it easier for the heat source to come into contact with the first sheet 2 and the second sheet 3 even if the surface of the heat source has irregularities.

The heat radiating structure 51 according to the third embodiment manufactures the pre-heat radiating structure 1a (see FIGS. 4 and 5) in the same manner as in the first embodiment, and the recess 5 of the second sheet 3 of the pre-heat radiating structure 1a. It is completed by arranging the second elastic member 7 in the.

Further, in the third embodiment, the second sheet 3 may be provided with a plurality of cuts along a direction (left-right direction on the paper surface) orthogonal to the longitudinal direction of the second elastic member 7, as in the first embodiment. Further, the second elastic member 7 may also be provided with a notch at the same position as or close to the notch of the second sheet 3 in the length direction thereof so as to make a half cut along the side surface thereof. Further, the second sheet 3 may be provided with a plurality of cuts along the longitudinal direction (paper surface depth direction) of the second elastic member 7. Further, the second sheet 3 may be provided with notches in a grid pattern.

(Fourth Embodiment)
Next, a fourth embodiment of the present invention will be described. The same reference numerals are given to the parts common to the first embodiment, and duplicate description will be omitted.

FIG. 8 is a perspective view showing the positional relationship between the heat radiating structure and the battery cell according to the fourth embodiment when the battery cell is used as the heat source.

The heat radiating structure 61 according to the fourth embodiment is not provided with the first elastic member 6 in the space 4, and the third sheet is fixed to the surface of the second sheet 3 opposite to the first sheet 2. In that it is provided with 8, unlike the heat radiating structure 1 according to the first embodiment, the other parts are common.

The third sheet 8 is a sheet containing at least one of metal, carbon, or ceramics, which is configured similarly to the first sheet 2 and / or the second sheet 3. When a battery cell is used as the heat source, in the heat radiating structure 61, the first sheet 2 is in contact with the bottom of the housing in which the battery cell 10 is arranged, and the third sheet 8 is a plurality of batteries, as in the first embodiment. It comes into contact with the lower end of the cell 10 located on the opposite side of the electrodes 11 and 12. Further, the third sheet 8 preferably has one or more second notches 9a in one direction or a plurality of in-plane directions on the surface opposite to the second sheet 3. In FIG. 8, the second notch 9a is provided so as to make a half cut in a grid pattern (solid line portion in FIG. 8). Further, the third sheet 8 may be provided with one or a plurality of cuts so as to make a half cut along the left-right direction of the paper surface or the depth direction of the paper surface. By making a notch in the third sheet 8, even if each surface on the heat source side and / or the cooling member side has irregularities, the first sheet 2, the second sheet 3, and the third sheet 8 are each said. It becomes easier to contact the surface. Further, the second sheet 3 may be provided with a plurality of first notches 9 along the left-right direction of the paper surface or the depth direction of the paper surface, as in the first embodiment (see FIG. 1A). Further, the second sheet 3 may be provided with notches in a grid pattern. Further, the surface of the first sheet 2 opposite to the second sheet 3 (lower surface in FIG. 8) may be provided with the second notch 9a as in the third sheet 8. However, the third sheet 8 is provided with the second notch 9a in preference to the first sheet 2. This is because increasing the contact area of the heat radiating structure 61 with the heat source has priority over increasing the contact area with the cooling member. The above-mentioned cut may be any form of cut such as a line-shaped cut or a dot-shaped cut.

Similar to the first embodiment, when the heat radiating structure 61 receives a compressive force in the thickness direction from the third sheet 8 to the first sheet 2, the uneven structure of the second sheet 3 is crushed. The second sheet 3 has a shape that repeats unevenness, and can be deformed so that the convex portion falls toward the concave portion 5 next to the convex portion. When no compressive force is applied in the thickness direction of the heat radiating structure 61, the first sheet 2 and the third sheet 8 are in contact with each other only at the open end of the second sheet 3. However, when the compressive force is applied, the first sheet 2 and the third sheet 8 come into contact with a portion other than the open end portion of the second sheet 3. As a result, the thermal conductivity between the third sheet 8 and the second sheet 3 and the thermal conductivity between the first sheet 2 and the second sheet 3 become higher.

Similar to the first embodiment, when the battery cell 10 is set in the housing 21, the heat radiating structure 61 is a heat radiating structure 1 between the battery cell 10 and the bottom portion 22 provided with the water cooling pipe 26. It is compressed in the thickness direction (see FIG. 3B). The second sheet 3 comes into contact with the first sheet 2 and the third sheet 8 in the form of tilting the space 4 or crushing the space 4. As a result, the heat from the battery cell 10 is easily transferred to the third sheet 8, the second sheet 3, the first sheet 2, the bottom portion 22, the water cooling pipe 26, and the cooling member 25.

FIG. 9 shows a schematic flow chart of a method for manufacturing a heat radiating structure according to a fourth embodiment. FIG. 10 shows an example of the apparatus used in the manufacturing method of FIG.

The method for manufacturing the heat radiating structure 61 according to the fourth embodiment includes a pre-sheet insertion step (S100), a pre-sheet molding step (S110), an adhesive application step (S120), and first sheet 2 and second sheet 3. This is a method in which the steps are performed in the order of the contact step (S130), the adhesive application step (S140) to the pre-radiation structure 1a, and the contact step (S150) between the pre-radiation structure 1a and the third sheet 8. The device 80 used in the manufacturing method is adhered to each component of the device 30 of FIG. 5 in the downstream direction of the pre-radiation structure 1a conveyed from between the sheet feed unit 34 and the second gear 32. The agent coating portion 33 and the spring plate 83 facing the adhesive coating portion 33 are provided. Further, the device 80 is separated from the structure feed portion 84 and the structure feed portion 84 in the downstream direction of the pre-heat dissipation structure 1a conveyed from between the adhesive coating portion 33 and the spring plate 83. It is provided with a heating plate 86 that faces the surface. Further, the device 80 includes a third sheet feed unit 88 in the downstream direction of the pre-heat dissipation structure 1a conveyed from between the seat feed unit 34 and the second gear 32. The structure feed portion 84 is a means for transporting the pre-heat dissipation structure 1a to which the adhesive is applied to the surface on the side of the second sheet 3 while applying pressure. The structure feed unit 84 may be, for example, a belt transport unit having a belt that drives the pre-heat dissipation structure 1a in the direction of the dotted arrow. Further, the structure feed portion 84 may be a means for transporting the pre-heat dissipation structure 1a by a roller. The hot plate 86 is a member to which high-temperature steam is supplied to the inside and kept at a high temperature. The third sheet feed unit 88 is a means for transporting the third sheet 8 to the structure feed unit 84. The third sheet feed unit 88 preferably has the shape of a roller and rotates on its axis by a driving means such as a motor or is driven by another rotating member such as a gear (solid line in the third sheet feed unit 88). Rotate in the direction of the arrow). Hereinafter, each step will be described with reference to FIG. Since the apparatus 30 for manufacturing the pre-heat dissipation structure 1a and each step (S100 to S130) are the same as those in the first embodiment, the description thereof will be omitted.

In the step (S140) of applying the adhesive to the pre-heat dissipation structure 1a, the surface of the pre-heat dissipation structure 1a on the second sheet 3 side is brought into contact with the adhesive application portion 33, and the adhesive is applied to the surface on the second sheet 3 side. Is the step of applying. Since the structure of the adhesive coating portion 33 is the same as that of the first embodiment, the description thereof will be omitted. Further, the device 80 includes a spring plate 83 facing the adhesive application portion 33. The spring plate 83 presses the pre-heat dissipation structure 1a conveyed to the adhesive coating portion 33 from above. The pre-heat dissipation structure 1a comes into contact with the adhesive application portion 33 while being pressed by the spring plate 83, so that the adhesive can be reliably applied to the surface on the second sheet 3 side. As the method of applying the adhesive, instead of the member having the shape of a roller, a flat plate holding the adhesive, a container storing the adhesive, or a brush holding the adhesive is used for application. Is also good.

In the contact step (S150) between the pre-heat dissipation structure 1a and the third sheet 8, an adhesive is applied to one side of the third sheet 8 (conveyed in the direction of arrow C) sent from the third sheet feed unit 88. This is a step of bringing the surfaces of the pre-heat dissipation structure 1a on the second sheet 3 side into contact with each other. The pre-heat dissipation structure 1a and the third sheet 8 coated with the adhesive are bonded to each other by being heated while being pressurized by the structure feed portion 84 and the heating plate 86. As a result, the heat radiating structure 61 according to the fourth embodiment is completed.

Instead of the step (S140) of applying the adhesive to the pre-heat dissipation structure 1a, the step of applying the adhesive to the third sheet 8 may be used. In such a case, in the contact step (S150) between the pre-heat dissipation structure 1a and the third sheet 8, the surface of the pre-heat dissipation structure 1a on the second sheet 3 side is formed on one surface of the third sheet 8 coated with the adhesive. It is a step to make contact.

(Action / effect of each embodiment)
As described above, the heat radiating structures 1, 41, 51, 61 are located between the battery cell 10 and the cooling member 25, and can conduct heat from the battery cell 10 to the cooling member 25 to dissipate heat from the battery cell 10. A first sheet 2 containing at least one of metal, carbon or ceramics, which can be arranged between the battery cell 10 and the cooling member 25, and at least one of metal, carbon or ceramics. The second sheet 3 is fixed to the surface of the first sheet 2 on the battery cell 10 side and has a shape of repeating continuous unevenness in a predetermined direction. Further, the second sheet 3 is provided so that a space 4 is formed between the first sheet 2 and the unevenness.

Therefore, the weight of the heat radiating structure can be reduced as compared with the conventional metal heat radiating fins and the like. Further, the heat radiating structures 1, 41, 51, 61 are compressed between the battery cell 10 and the cooling member 25, so that the second sheet 3 collapses the space 4 or crushes the space 4. Since it comes into contact with 2, it is less likely to depend on the unevenness of the surface of the battery cell, and the contact area with the heat source is high, so that high heat dissipation efficiency can be obtained.

Further, the second sheet 3 is provided with one or more first notches 9 in the portion forming the space 4, so that the second sheet 3 is less dependent on the unevenness of the surface of the battery cell, and high heat dissipation efficiency can be obtained. ..

Further, since the heat radiating structure 1 is provided with the first elastic member 6 in the space 4, it becomes less dependent on the unevenness of the surface of the battery cell, and high heat radiating efficiency can be obtained.

Further, the heat radiating structure 51 includes a second elastic member 7 between the concave portion 5 of the second sheet 3, that is, the unevenness of the second sheet 3 and the battery cell 10. As a result, the heat radiating structure 51 becomes less dependent on the unevenness of the surface of the battery cell, and high heat radiating efficiency can be obtained.

Further, the heat radiating structure 61 is one or more on the surface of the first sheet 2 and the third sheet 8 opposite to the second sheet 3 of the third sheet 8 in one direction or a plurality of directions in the surface. By providing the second notch 9a of the above, it becomes less dependent on the unevenness of the surface of the battery cell, and high heat dissipation efficiency can be obtained.

Further, since the space 4 has a shape long in one direction and has the form of a cylinder with both ends open or a cup with one end open, the deformability of the space 4 is enhanced, and the surface irregularities of the plurality of battery cells 10 are increased. It becomes less dependent on, and high heat dissipation efficiency can be obtained. Further, the heat radiating structures 1, 41, 51, 61 are lighter due to the space 4.

(Other embodiments)
As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these, and can be implemented in various modifications.

FIG. 11 shows a schematic flow chart of a modified example of the method for manufacturing the heat radiating structure according to the first embodiment. FIG. 12 shows an example of the apparatus used in the manufacturing method of FIG.

In the first embodiment, in the above-mentioned manufacturing method, after manufacturing the pre-radiation structure 1a by the manufacturing method of FIG. 4, the first elastic member 6 is arranged in the space 4, and the first notch 9 is made to make the heat dissipation structure. Although No. 1 was completed, the heat dissipation structure was formed by performing the first elastic member loading step (S125) between the adhesive application step (S120) and the contact step (S130) between the first sheet and the second sheet. Body 1 may be manufactured (see FIG. 11).

The device 90 used here includes, in addition to each component of the device 30 of FIG. 5, an elastic member loading unit 91 located on the downstream side of the second gear 32 in the rotational direction from the adhesive application unit 33. The loading step (S125) of the first elastic member is a step of loading the first elastic member 6 into the recess of the second sheet 3 to which the adhesive has been applied by the adhesive application step (S120). The elastic member loading unit 91 includes an elastic member supply unit 92 and an elastic member arranging unit 93. The elastic member supply unit 92 is a member for supplying the first elastic member 6 to the elastic member arrangement unit 93, and is preferably a tubular metal member having plasticity. The elastic member arranging portion 93 preferably includes a roller 94 capable of incorporating the first elastic member 6 into the groove 96, and a sprocket 95 capable of engaging with the roller 94. The roller 94 rotates by a driving means such as a motor, or is driven by another rotating member such as a gear (rotates in the direction of the solid arrow on the roller 94). Further, the sprocket 95 rotates following the rotation of the roller 94. The first elastic member 6 supplied by the elastic member supply unit 92 rotates while being taken into the groove 96 of the roller 94, moves to the engagement position with the sprocket 95, and falls off into the notch portion of the sprocket 95. .. Then, the first elastic member 6 that has fallen off into the notch portion of the sprocket 95 is loaded into the recess of the second sheet 3 conveyed by the second gear 32 in accordance with the rotation of the sprocket 95.

Then, by the contact step (S130) between the first sheet and the second sheet, the second sheet 3 in which the first elastic member 6 is loaded is adhered to one side of the first sheet 2 sent from the sheet feed unit 34. The pre-radiation structure 1b is completed by bringing the parts coated with the agent into contact with each other. The loading step (S125) of the first elastic member may be a step performed after the contact step (S130) between the first sheet and the second sheet. In that case, the first elastic member 6 is preferably inserted from the opening side of the already formed space 4.

Then, the pre-radiation structure 1b sandwiched between the sheet feed portion 34 and the second gear 32 and conveyed downstream is half-cut along a direction orthogonal to the longitudinal direction of the first elastic member 6 (left-right direction on the paper surface). When the first notch 9 is made so as to do so, the heat dissipation structure 1 is completed.

Further, the pre-sheet 3a may be a sheet provided with first cuts 9 along the left-right direction of the paper surface in FIG. 12 at predetermined intervals in the left-right direction of the paper surface and the depth direction of the paper surface, respectively. Further, the first elastic member 6 may also be provided with a notch at the same position as or close to the first notch 9 in the length direction thereof so as to make a half cut along the side surface thereof. In such a case, the heat radiating structure 1 is completed by sequentially performing each step (S100 to S130) of the manufacturing method of FIG. 11 using the device 90.

13A and 13B show some modifications of the device of FIG.

The device 90 may include the elastic member loading portion 91a shown in FIG. 13A instead of the elastic member loading portion 91 shown in FIG. The elastic member loading portion 91a preferably has the shape of a roller and rotates on its axis by a driving means such as a motor or is driven by another rotating member such as a gear (the solid arrow in the elastic member loading portion 91a). Rotate in the direction). Further, the elastic member loading unit 91a has a mechanism for sucking and discharging air, and by this mechanism, the first elastic member 6 can be adsorbed on the roller surface or dropped from the roller surface. be. In this case, in the loading step (S125) of the first elastic member, the second sheet 3 coated with the adhesive by the adhesive application step (S120) is conveyed to the sheet feeding portion 34, and the elastic member loading portion 51a By dropping the first elastic member 7 adsorbed on the surface at predetermined intervals, the step of loading the first elastic member 7 into the recess of the second sheet 3 is performed.

Further, the device 90 may include an elastic member loading portion 91b as shown in FIG. 13B instead of the elastic member loading portion 91 shown in FIG. The elastic member loading portion 91b does not have the elastic member arranging portion 93, and the elastic member supply portion 92b is provided above the second sheet 3. The elastic member supply unit 92b is a tubular metal member filled with a plurality of first elastic members 6, and includes a partition plate 98 that prevents the first elastic member 6 from falling. The partition plate 98 is a metallic plate that can be slid in the left-right direction of the paper surface by a driving means such as a motor. In this case, the loading step (S125) of the first elastic member is a partition plate at predetermined time intervals while transporting the second sheet 3 coated with the adhesive by the adhesive application step (S120) to the sheet feed unit 34. This is a step of driving the opening and closing of 58 to load the first elastic member 6 into the recess of the second sheet 3.

The heat radiating structure 51 according to the third embodiment may include the first elastic member 6 in the space 4 as in the first embodiment. That is, the heat radiating structure 51 according to the third embodiment may include the first elastic member 6 in the space 4 and the second elastic member 7 between the unevenness of the second sheet 3 and the battery cell 10. .. With this configuration, it is less dependent on the unevenness of the surface of the heat source, the contact area with the heat source is high, and high heat dissipation efficiency can be obtained.

The heat radiating structure 61 according to the fourth embodiment is not limited to the manufacturing method of FIG. 9. For example, in the adhesive application step (S120), the adhesive is applied to both surfaces of the second sheet 3 formed into a tooth profile. It may be a step to do. In such a case, instead of each subsequent step (S130 to S150), one side of the first sheet 2 is brought into contact with one side of the second sheet 3 coated with an adhesive on both sides, and the other side of the second sheet 3 is brought into contact with the other. One side of the third sheet 8 may be brought into contact with the surface.

The heat radiating structure 61 according to the fourth embodiment may include the first elastic member 6 in the space 4 as in the first embodiment. Further, the heat radiating structure 61 may be provided with the second elastic member 7 in the recess 5 as in the third embodiment. Further, the heat radiating structure 61 may include a first elastic member 6 in the space 4 and a second elastic member 7 in the recess 5. The first elastic member 6 and / or the second elastic member 7 has heat sources on the first sheet 2, the second sheet 3, and the third sheet 8 even if the surface of the heat source such as the battery cell 10 has irregularities. Contributes to making it easier to contact.

In such a case, after the heat radiating structure 61 is manufactured by the manufacturing method of FIG. 9, the first elastic member 6 is arranged in the space 4 and / or the second elastic member 7 is arranged in the recess 5. Just go. Further, as in the first embodiment, the first elastic member is formed between the adhesive application step (S120) and the contact step (S130) between the first sheet and the second sheet, or after the contact step (S130). The loading step (S125) may be performed (see FIG. 11). Further, the second elastic member 7 is attached between the step (S140) of applying the adhesive to the pre-heat dissipation structure and the contact step (S150) between the pre-heat dissipation structure and the third sheet, or after the contact step (S130). It may be loaded in the recess 5.

The first elastic member 6 and the second elastic member 7 may be rod-shaped elastic members having recesses in the length direction thereof, instead of the through-passages 61 and 71. The larger the depression in the length direction of the first elastic member 6 and the second elastic member 7, the higher the deformability of the first elastic member 6 and the second elastic member 7. Therefore, it is more preferable that the first elastic member 6 and the second elastic member 7 have a recess that closes one opening portion of the through-passages 61 and 71.

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 25 may be not only cooling water but also an organic solvent, liquid nitrogen, or a cooling gas. Further, the heat radiating structures 1, 41, 51, 61 may be arranged in a structure other than the battery 20, for example, an electronic device, a home appliance, a power generation device, or the like.

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.

The heat dissipation structure according to the present invention can be 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. Further, the battery according to the present invention can be used not only as a battery for automobiles but also as a rechargeable battery for home use and a battery for electronic devices such as PCs.

Claims (10)

A heat dissipation structure that conducts heat from a heat source to a cooling member to enable heat dissipation from the heat source.
A first sheet containing at least one of metal, carbon or ceramics and disposed between the heat source and the cooling member.
A second sheet containing at least one of metal, carbon, or ceramics, fixed to the surface of the first sheet on the heat source side, and having a shape of repeating continuous unevenness in a predetermined direction.
With
The second sheet is a heat radiating structure characterized in that a space is formed between the first sheet and the unevenness. The heat radiating structure according to claim 1, wherein the second sheet is provided with one or more first cuts in a portion forming the space. The heat radiating structure according to claim 1 or 2, wherein the space is provided with a first elastic member. The heat radiating structure according to any one of claims 1 to 3, wherein a second elastic member is provided between the unevenness of the second sheet and the heat source. Any one of claims 1 to 4, which comprises at least one of metal, carbon or ceramics and includes a third sheet of the second sheet fixed to a surface opposite to the first sheet. The heat dissipation structure described in the section. At least one of the first sheet and the third sheet, which is opposite to the second sheet of the third sheet, is provided with one or more second cuts in one direction or a plurality of directions in the surface. The heat-dissipating structure according to claim 5. The heat radiating structure according to any one of claims 1 to 6, wherein the space has a shape long in one direction and has the form of a cylinder having both ends open or a cup having one end open. The first rotatable gear and
A second gear that meshes with the first gear and rotates,
An adhesive coating portion located downstream of the contact position between the first gear and the second gear in the rotational direction of the second gear.
A sheet feed portion located on the downstream side in the rotation direction of the second gear from the adhesive coating portion,
A method for manufacturing a heat radiating structure according to any one of claims 1 to 7, using an apparatus comprising the above.
A step of inserting the presheet before molding the second sheet into the contact position from the opposite side of the adhesive application portion with respect to the contact position.
A step of feeding the presheet in the traveling direction of the second gear while forming the tooth profile of the second gear, and
A step of bringing the portion molded into the tooth profile into contact with the adhesive coating portion and applying the adhesive to the molded portion of the second sheet.
A step of bringing the adhesive-coated portion of the second sheet obtained by molding the pre-sheet into contact with one side of the first sheet sent from the sheet feed portion.
Method of manufacturing a heat dissipation structure including. The first rotatable gear and
A second gear that meshes with the first gear and rotates,
An adhesive coating portion located downstream of the contact position between the first gear and the second gear in the rotational direction of the second gear.
A sheet feed portion located on the downstream side in the rotation direction of the second gear from the adhesive coating portion,
A method for manufacturing a heat radiating structure according to any one of claims 1 to 7, using an apparatus comprising the above.
A step of inserting the presheet before molding the second sheet into the contact position from the opposite side of the adhesive application portion with respect to the contact position.
A step of feeding the presheet in the traveling direction of the second gear while forming the tooth profile of the second gear, and
The step of applying the adhesive by bringing one side of the first sheet into contact with the adhesive application portion,
A step of bringing the second sheet obtained by molding the pre-sheet into contact with one side of the first sheet sent from the sheet feed unit.
Method of manufacturing a heat dissipation structure including. A battery having one or more battery cells as heat sources in a housing that contacts the cooling member.
A battery in which the heat radiating structure according to any one of claims 1 to 7 is interposed between the battery cell and the cooling member.

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