JP2021140961A - Heat dissipation structure and battery including the same - Google Patents

Abstract

To provide a heat dissipation structure which can be adapted to various forms of a heat source, which is rich in elastic deformability, and which is capable of increasing the heat dissipation of a heat source through heat storage effects, and a battery including the heat dissipation structure.SOLUTION: The present invention relates to: a heat dissipation structure 1 which is located between a heat source 50 and a cooling member 45 and conducts heat from the heat source 50 to the cooling member 45, thereby achieving heat dissipation from the heat source 50, and in which a cushion member 11 comprising a rubber-like elastic body contains a heat storage capsule 3 where a heat storage material storing heat by phase transition is sealed in a microcapsule; and a battery 40 including the same.SELECTED DRAWING: Figure 1

Description

The present invention relates to a heat radiating structure and a battery including the heat radiating structure.

Control systems for automobiles, aircraft, ships, or household or commercial electronic devices are becoming more accurate and complex, and the density of small electronic components on circuit boards is increasing. .. As a result, it is strongly desired to solve the failure and shortening of the life of electronic components due to heat generation around the circuit board.

In order to realize quick heat dissipation from the circuit board, conventionally, the circuit board itself is made of a material having excellent heat dissipation, a heat sink is attached, or a cooling fan is driven by a single means or a combination of multiple means. It is done. Of these, a method in which the circuit board itself is made of a material having excellent heat dissipation, for example, diamond, aluminum nitride (AlN), cubic boron nitride (cBN), etc., makes the cost of the circuit board extremely high. In addition, the arrangement of the cooling fan causes problems such as failure of the rotating device called the fan, maintenance necessity for preventing the failure, and difficulty in securing the installation space. On the other hand, the heat radiating fin is a simple one that can increase the surface area and further improve the heat radiating property by forming a large number of columnar or flat plate-shaped projecting portions using a metal having high thermal conductivity (for example, aluminum). Since it is a member, it is widely used as a heat-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 are becoming widespread in China as well as in European countries such as France, the Netherlands, and Germany. In order to popularize electric vehicles, it is necessary to develop high-performance batteries and install a large number of charging stations. In particular, it is important to develop technology to enhance the charge / discharge function of lithium-based automobile batteries. It is well known that the above-mentioned automobile battery cannot fully exert its charge / discharge function at a high temperature of 60 degrees Celsius or higher. For this reason, it is important to improve the heat dissipation of the battery as well as the circuit board described above.

In order to quickly dissipate heat from the battery, place the water cooling pipe in a metal housing with excellent thermal conductivity such as aluminum, place a large number of battery cells in the housing, and place the battery cell and the bottom of the housing. A structure in which an adhesive rubber sheet is sandwiched between the two is adopted. In a battery having such a structure, the battery cell transfers heat to the housing through a rubber sheet and is effectively removed by water cooling.

Japanese Patent Application Laid-Open No. 2008-24399

However, in the conventional battery as described above, since the rubber sheet has lower thermal conductivity than aluminum or graphite, it is difficult to efficiently transfer heat from the battery cell to the housing. A method of sandwiching a spacer such as graphite instead of the rubber sheet is also conceivable, but since the lower surfaces of the plurality of battery cells are not flat and have steps, a gap is generated between the battery cells and the spacer, and the heat transfer efficiency is improved. descend. As can be seen in such an example, since the battery cell can take various forms (including unevenness such as a step or a non-smooth surface state), it can be adapted to various forms of the battery cell and has a high heat storage effect. There is an increasing demand for lowering the peak temperature of battery cells. Further, it is required that the material of the container of the battery cell is more easily elastically deformed, and a heat radiating structure that returns to a shape close to the original shape when the battery cell is removed is desired. This leads not only to battery cells, but also to other heat sources such as circuit boards, electronic components or electronics bodies.

The present invention has been made in view of the above problems, and is a heat dissipation structure that is adaptable to various forms of a heat source, is highly elastically deformable, and can enhance heat dissipation of the heat source through a heat storage effect. It is an object of the present invention to provide a battery having a heat dissipation structure.

(1) The heat dissipation structure according to the embodiment for achieving the above object is between the heat source and the cooling member, and heat is conducted from the heat source to the cooling member to enable heat dissipation from the heat source. A heat storage capsule in which a heat storage material that stores heat by a phase transition is enclosed in a microcapsule is contained in a cushion member that is a structure and is composed of a rubber-like elastic body.
(2) In the heat radiating structure according to another embodiment, preferably, a plurality of heat radiating members including the cushion member are connected to each other, and the cushion member has a tubular shape having a hollow portion in the length direction thereof. It is a long member.
(3) In the heat radiating structure according to another embodiment, preferably, the heat radiating member further includes a heat conductive sheet containing at least one of metal, carbon, or ceramics, and the cushion member is attached to the heat conductive sheet. In comparison, it is easily deformed according to the surface shape of the heat source, and the heat conductive sheet is a sheet for transferring heat from the heat source and is provided on the outer periphery of the cylinder of the cushion member.
(4) In the heat radiating structure according to another embodiment, preferably, the heat conductive sheet contains the heat storage capsule.
(5) In the heat radiating structure according to another embodiment, preferably, the heat conductive sheet is provided on the outer periphery of the cylinder of the cushion member in a shape that advances while being wound in a spiral shape.
(6) In the heat radiating structure according to another embodiment, preferably, the heat conductive sheet is a first gap along the length direction of the cushion member, and the first one corresponding to the thickness of the heat conductive sheet. It is provided so as to cover the outer periphery of the cylinder of the cushion member with a gap, and the first gap is formed in a direction other than the direction in which the plurality of heat radiating members are connected.
(7) In the heat radiating structure according to another embodiment, preferably, the cushion member has a second gap connected to the hollow portion at the position of the first gap of the heat conductive sheet.
(8) In the heat radiating structure according to another embodiment, preferably, the plurality of the heat radiating members are connected by a thread in a direction orthogonal to the length direction thereof.
(9) In the heat radiating structure according to another embodiment, preferably, the plurality of the heat radiating members are fixed to the frame body in a state of bridging the openings of the frame body.
(10) In the heat radiating structure according to another embodiment, the frame is preferably formed so that its thickness is thinner than the thickness of the heat radiating member deformed by pressing from the heat source.
(11) In the heat radiating structure according to another embodiment, preferably, the surface of the heat conductive sheet has a heat conductive oil for increasing the heat conductivity from the heat source in contact with the surface to the surface. ..
(12) In the heat radiating structure according to another embodiment, preferably, the heat conductive oil has higher heat conductivity than the silicone oil and the silicone oil, and is composed of one or more of metal, ceramics or carbon. Includes with sex filler.
(13) The battery according to one embodiment is a battery having one or more battery cells as heat sources in a housing having a structure for flowing a cooling member, and is between the battery cells and the housing. The heat radiating structure according to any one of the above items is provided.

According to the present invention, it is possible to provide a heat radiating structure that is adaptable to various forms of a heat source, is rich in elastic deformability, and can enhance heat dissipation of the heat source through a heat storage effect, and a battery provided with the heat radiating structure. ..

FIG. 1 shows a perspective view (1A) in a state where the heat radiating structure according to the first embodiment is arranged directly under the battery cell, and a sectional view taken along line AA (1B) in the (1A). FIG. 2 shows a vertical cross-sectional view of a battery including the heat radiating structure according to the first embodiment. FIG. 3 shows a vertical cross-sectional view of a modified example 1 of a battery including the heat radiating structure according to the first embodiment. FIG. 4 is a perspective view (4A) of the heat radiating structure according to the second embodiment, a vertical cross-sectional view (4B) of a heat radiating member constituting the heat radiating structure, and an enlarged view (4C) of a region B in the cross-sectional view. ) Are shown respectively. FIG. 5 is a vertical cross-sectional view (5A) of the battery including the heat-dissipating structure according to the second embodiment and a vertical cross-sectional view (5B) of the battery including the heat-dissipating structure when the heat-dissipating structure is compressed by the battery cell. show. FIG. 6 is a plan view (6A) of the heat radiating structure according to the third embodiment, a sectional view taken along line CC (6B) in the (6A), and an enlarged view (6C) of a region D in the sectional view. Each is shown. FIG. 7 shows a vertical cross-sectional view (7A) of the heat radiating structure according to the third embodiment and a battery including the heat radiating structure, and the heat radiating structure before and after compressing the heat radiating structure by the battery cell in the (7A). The cross-sectional view (7B) of the morphological change is shown respectively. FIG. 8 shows a diagram for explaining a part of the method for manufacturing the heat radiating structure according to the third embodiment. FIG. 9 shows a plan view of the heat radiating structure according to the fourth embodiment. 10A is a side view (10A) of the heat radiating structure shown in FIG. 9 viewed from the direction of arrow E, a side view (10B) of the heat radiating structure shown in FIG. 9 seen from the direction of arrow F, and the side view (10B). An enlarged view (10C) of the region G in 10B) is shown. FIG. 11 shows a plan view of the heat radiating structure according to the fifth embodiment. FIG. 12 is a perspective view (12A) of a part of the heat radiating structure of FIG. 11 and an enlarged view of the region H of FIG. 11, showing a change in form (12B) before and after compressing the heat radiating structure. FIG. 13 shows a modified example 2 of the heat radiating structure according to the fifth embodiment in the same field of view as in FIG. 12 (12B). FIG. 14 shows a vertical cross-sectional view of a battery including the heat radiating structure according to the fifth embodiment. FIG. 15 shows an enlarged view of the region I of FIG. FIG. 16 shows a modified example 3 of the battery including the heat radiating structure according to the fifth embodiment in the same field of view as in FIG. FIG. 17 shows a plan view of the heat radiating structure according to the sixth embodiment. FIG. 18 shows a diagram for explaining a modified example 4 of the heat radiating structure according to the third embodiment and the fourth embodiment and a method for manufacturing the same.

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. 1 shows a perspective view (1A) in a state where the heat radiating structure according to the first embodiment is arranged directly under the battery cell, and a sectional view taken along line AA (1B) in the (1A). FIG. 2 shows a vertical cross-sectional view of a battery including the heat radiating structure according to the first embodiment.

(1) Outline of Battery As shown in FIG. 2, the battery 40 has a structure in which one or more battery cells 50 as heat sources are provided in a housing 41 having a structure for flowing a cooling member 45. The heat radiating structure 1 is preferably provided between the end portion (lower end portion) of the battery cell 50 on the side closer to the cooling member 45 and a part (bottom portion 42) of the housing 41 on the side closer to the cooling member 45. ing. In FIG. 2, 11 battery cells 50 are mounted on the heat radiating structure 1, but the number of battery cells 50 mounted on the heat radiating structure 1 is not limited to 11. In the present application, the "cross section" or "vertical cross section" means a cross section in the inner 44 of the housing 41 of the battery 40 in the direction of vertically cutting from the upper opening surface to the bottom 42.

In this embodiment, the battery 40 is, for example, a battery for an electric vehicle and includes a large number of battery cells (which may be simply referred to as cells) 50. The battery 40 includes a bottomed housing 41 that opens to one side. The housing 41 is preferably made of aluminum or an aluminum-based alloy. The battery cell 50 is arranged inside 44 of the housing 41. Electrodes 51 and 52 (see FIG. 1) are provided so as to project above the battery cell 50. The plurality of battery cells 50 are preferably brought into close contact with each other in the housing 41 by applying a force in the direction of compression from both sides thereof using screws or the like (not shown). The bottom 42 of the housing 41 is provided with one or more water cooling pipes 43 for flowing cooling water, which is an example of the cooling member 45. The cooling member may be referred to as a cooling medium or a cooling agent. The battery cell 50 is arranged in the housing 41 so as to sandwich the heat radiating structure 1 with the bottom portion 42. In the battery 40 having such a structure, the battery cell 50 transfers heat to the housing 41 through the heat radiating structure 1 and is effectively removed by water cooling. The cooling member 45 is not limited to cooling water, but is interpreted to include an organic solvent such as liquid nitrogen and ethanol. The cooling member 45 is not limited to a liquid under the conditions used for cooling, and may be a gas or a solid.

(2) Schematic configuration of the heat radiating structure The heat radiating structure 1 according to the first embodiment is located between the battery cell 50 and the cooling member 45, and heat is conducted from the battery cell 50 to the cooling member 45 to be transmitted from the battery cell 50 to the cooling member 45. It is a structure that enables heat dissipation. The heat radiation structure 1 is a structure containing a heat storage capsule 3 formed by enclosing a heat storage material that stores heat by phase transition in a microcapsule in a cushion member 11 composed of a rubber-like elastic body (FIG. 1 (FIG. 1). See 1B)).

(3) Cushion member The important functions of the cushion member 11 are deformability and resilience. Deformability is a characteristic necessary to follow the shape of the battery cell 50, and in particular, semi-solid materials such as lithium-ion batteries and contents having liquid properties are contained in a package that is easily deformable. In the case of the battery cell 50, there are many cases where the design dimensions are irregular or the dimensional accuracy cannot be improved. Therefore, it is important to maintain the deformability of the cushion member 11 and the resilience for maintaining the following force.

The cushion member 11 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); urethane-based , Ester-based, styrene-based, olefin-based, butadiene-based, fluorine-based and other thermoplastic elastomers, or composites thereof. The cushion member 11 is preferably made of a material having high heat resistance that can maintain its shape without being melted or decomposed by heat radiation from the battery cell 50. In this embodiment, the cushion member 11 is more preferably made of a urethane-based elastomer impregnated with silicone or silicone rubber. The cushion member 11 may be configured by dispersing fillers typified by AlN, cBN, hBN, diamond particles, etc. in the rubber as described above in order to enhance its thermal conductivity. The cushion member 11 may contain air bubbles or may not contain air bubbles. Further, the "cushion member" means a member that is highly flexible and can be elastically deformed so as to be in close contact with the surface of a heat source, and in this sense, it can be read as a "rubber-like elastic body". The cushion member 11 can also be made of a sponge or a solid (a non-porous structure such as a sponge) formed of resin, rubber, or the like.

(4) Heat storage capsule The heat storage capsule 3 has a film (capsule) formed around a core substance containing a heat storage substance. The heat storage capsule 3 preferably contains an elastomer in the core material in order to prevent the heat storage material from leaking from the coating film. In this embodiment, the heat storage substance, the elastomer, and other additives are also collectively referred to as a "core substance". The heat storage capsule 3 preferably has a diameter of 50 to 200 μm, and more preferably 150 μm in diameter. In this embodiment, the heat storage capsule 3 is preferably configured so that the core substance is 70% by weight and the coating film is 30% by weight. Further, in this embodiment, the heat storage capsule 3 is preferably configured so that the core substance is 77% by volume and the coating is 23% by volume. The mass content of the heat storage capsule 3 with respect to the cushion member 11 is preferably 30 to 70% by mass, more preferably 40 to 60% by mass, and even more preferably 46 to 53% by mass. The same applies to other embodiments.

(4-1) Heat storage substance In this embodiment, the heat storage substance is preferably a latent heat storage substance such as a paraffin compound, a fatty acid, a fatty acid ester compound, an aliphatic ether, an aliphatic ketone, or an aliphatic alcohol, and is chemically chemically. And a fatty acid ester compound which is a physically stable compound and has a high heat storage capacity is more preferable. As the fatty acid ester compound, for example, a long-chain fatty acid ester having 8 to 30 carbon atoms can be used, and specifically, vinyl stearate, dimethyl sebacate, butyl stearate, isopropyl stearate, isopropyl palmitate, and palmitin. Examples include propyl acid. When the melting point of the heat storage substance is lower than the outside air temperature, the heat storage substance is always in the state after the phase transition (liquid state), so that the heat storage is not performed even if the heat from the battery cell 50 is received. On the other hand, when the melting point of the heat storage substance is too high, heat absorption by the phase transition is not performed until the temperature of the battery cell 50 rises to near the melting point temperature. From these points, the melting point and the freezing point of the heat storage substance are preferably in the range of 20 to 100 ° C, more preferably in the range of 35 ° C to 60 ° C.

(4-2) Elastomer In this embodiment, the elastomer is, for example, a conjugated diene rubber (excluding a hydrogenated conjugated diene (co) polymer), an ethylene / α-olefin copolymer rubber, and a hydrogenated conjugated diene (co). ) A polymer, an ethylene / vinyl acetate copolymer, or the like is preferable. These may be used alone or in combination of two or more. Since the elastomer has rubber elasticity and acts as a binder component that satisfactorily encapsulates the heat storage substance, it is possible to prevent the heat storage substance from leaking from the coating film. In particular, thermoplastic elastomers are preferable because they can be repeatedly molded during production, and from the viewpoint of preventing bleeding (bleeding) of heat storage substances and long-term durability, hydrogenated conjugated diene (co) polymers are used. More preferred.

(4-3) Coating In this embodiment, the coating is, for example, a melamine resin, a urea resin, a polystyrene resin, an acrylic resin, a styrene- (meth) acrylic acid ester copolymer resin, a polyacrylonitrile, an acrylonitrile-styrene copolymer resin ( It is preferably composed of a hard resin having high heat resistance such as AS resin) that can maintain its form without being melted or decomposed by heat radiation from the battery cell 50. In addition, these polymers may contain other monomers for the purpose of imparting functions, or these polymers may be crosslinked, as long as the effects required for heat storage applications can be maintained.

(4-4) Other Additives The heat storage capsule 3 may contain fillers typified by AlN, cBN, hBN, diamond particles and the like as other additives. The content of the filler is preferably such that the core material can maintain the fluidity above the melting point of the elastomer from the viewpoint of maintaining the filling property at the time of processing. Specifically, it is preferably 0.01 to 50% by mass, and more preferably 1 to 30% by mass with respect to 100% by mass of the core substance. It should be noted that such an additive is not an essential configuration for the heat dissipation structure 1 or the battery 40, but is an additional configuration that can be suitably provided. This also applies to the second and subsequent embodiments.

As described above, since the heat radiating structure 1 is arranged between the battery cell 50 and the cooling member 45 and is composed of the cushion member 11 containing the heat storage capsule 3, the heat from the battery cell 50 is transferred to the heat storage capsule 3. Can be stored. Therefore, the heat dissipation structure 1 can suppress or delay heat dissipation to the outside while suitably cooling the battery cell 50, so that a rapid temperature rise of the battery cell 50 and eventually the battery 40 can be suppressed. .. Further, since the heat radiating structure 1 includes the cushion member 11, when it is compressed by the battery cell 50, it follows the surface of the battery cell 50 and is crushed in the vertical and horizontal directions, and the battery cell 50 is removed. Can return to its original shape by the elastic force of the cushion member 11. Therefore, the heat radiating structure 1 can adapt to various forms of the battery cell 50, is highly elastically deformable, and can enhance the heat radiating of the battery cell 50 through the heat storage effect.

(Modification 1 of the first embodiment)
FIG. 3 shows a vertical cross-sectional view of a modified example 1 of a battery including the heat radiating structure according to the first embodiment.

In the battery 40a according to the first modification, as shown in FIG. 3, the heat radiating structure 1 is added between the battery cells 50 and the bottom 42, and between the adjacent battery cells 50 and between the battery cells 50 and the housing. It is arranged so as to be sandwiched between the side surface of the body 41. The configuration other than the arrangement of the heat radiating structure 1 is the same as that of the first embodiment, and thus the description thereof will be omitted. In the battery 40a having such a structure, the battery cell 50 transfers heat to the housing 41 through the heat radiating structure 1 and is efficiently removed by water cooling, as in the battery 40 according to the first embodiment. In particular, in the battery 40a, since the heat radiating structure 1 is arranged on the side surface and the bottom surface of the battery cell 50 so as to surround the battery cell 50, higher heat radiating efficiency can be realized. In the first modification, as shown in FIG. 3, the battery 40a has a heat radiating structure 1 at all locations between the adjacent battery cells 50 and between the battery cells 50 and the side surface of the housing 41. Is arranged, but the present invention is not limited to this. The battery 40a may have the heat radiating structure 1 arranged between adjacent battery cells 50 and at least one of the side surfaces of the battery cells 50 and the housing 41.

(Second Embodiment)
Next, the heat radiating structure according to the second embodiment and the battery including the heat radiating structure will be described. The same reference numerals are given to the parts common to the above embodiments, and duplicate description will be omitted.

FIG. 4 is a perspective view (4A) of the heat radiating structure according to the second embodiment, a vertical cross-sectional view (4B) of a heat radiating member constituting the heat radiating structure, and an enlarged view (4C) of a region B in the cross-sectional view. ) Are shown respectively. FIG. 5 is a vertical cross-sectional view (5A) of the battery including the heat-dissipating structure according to the second embodiment and a vertical cross-sectional view (5B) of the battery including the heat-dissipating structure when the heat-dissipating structure is compressed by the battery cell. show.

Unlike the heat radiating structure 1 according to the first embodiment, the heat radiating structure 1a according to the second embodiment is configured by connecting a plurality of heat radiating members 5. More specifically, in the heat radiating structure 1a, a plurality of heat radiating members 5 including the cushion member 11 are preferably arranged on the heat conductive sheet 4 arranged between the battery cell 50 and the cooling member 45. As a result, a plurality of heat radiating members 5 are connected by the heat conductive sheet 4 (see FIGS. 4 (4A) and 5). In the battery 40b according to the second embodiment, the configurations other than the heat radiating structure 1a are the same as those in the first embodiment, so detailed description thereof will be omitted.

(Heat conduction sheet)
The heat conductive sheet 4 is preferably a sheet containing carbon, and more preferably a sheet containing a carbon filler and a resin. The resin can be a synthetic fiber, and in that case, an aramid fiber can be preferably used. The term "carbon" as used in the present application includes any structure composed of carbon (element symbol: C) such as graphite, carbon black having lower crystallinity than graphite, expanded graphite, diamond, and diamond-like carbon having a structure similar to diamond. Is interpreted in a broad sense. In this embodiment, the heat conductive sheet 4 can be a thin sheet obtained by curing a material obtained by blending and dispersing graphite fibers and carbon particles in a resin. The heat conductive sheet 4 may be carbon fibers knitted in a mesh shape, and may be blended or knitted. Various fillers such as graphite fibers, carbon particles and carbon fibers are all included in the concept of carbon fillers.

When the heat conductive sheet 4 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 4. That is, it does not matter whether or not the heat conductive sheet 4 uses resin as the main material as long as there is no major problem in heat conduction. As the resin, for example, a thermoplastic resin can be preferably used. As the thermoplastic resin, a resin having a high melting point that does not melt when conducting heat from the battery cell 50, which is an example of a heat source, is preferable. For example, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), and the like. Polyamideimide (PAI), aromatic polyamide (aramid fiber) and the like can be preferably mentioned. The resin is dispersed in the gaps between the carbon fillers, for example, in the form of particles or fibers in the state before molding of the heat conductive sheet 4. In addition to the carbon filler and the resin, the heat conductive sheet 4 may be dispersed with AlN or diamond as a filler for further enhancing the heat conduction. Further, instead of the resin, an elastomer that is more flexible than the resin may be used. The heat conductive sheet 4 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 Al 2} O ₃ , AlN, cBN, and hBN can be selected.

It does not matter whether the heat conductive sheet 4 is excellent in conductivity or not. The thermal conductivity of the heat conductive sheet 4 is preferably 10 W / mK or more. In this embodiment, the heat conductive sheet 4 is preferably a strip of graphite, aluminum, aluminum alloy, copper or stainless steel, and is made of a material having excellent heat conductivity and conductivity. The heat conductive sheet 4 is preferably a sheet having excellent curvature (or flexibility), and the thickness thereof is not limited, but 0.02 to 3 mm is preferable, and 0.03 to 0.5 mm is more preferable. However, since the thermal conductivity of the heat conductive sheet 4 decreases as the thickness increases, it is necessary to determine the thickness by comprehensively considering the strength, flexibility and heat conductivity of the sheet. preferable.

(Heat dissipation member)
The heat radiating member 5 is a member including the cushion member 11a. The cushion member 11a is a long tubular member having a hollow portion 12 in the length direction thereof (see FIG. 4). The heat radiating member 5 contains the heat storage capsule 3 in the cushion member 11a (see FIG. 4 (4C)). The cushion member 11a improves the contact between the heat conductive sheet 4 and the lower end portions even when the lower end portions of the plurality of battery cells 50 are not flat. Further, the hollow portion 12 has a function of facilitating the deformation of the cushion member 11a, contributing to the weight reduction of the heat radiating structure 1a, and enhancing the contact between the heat conductive sheet 4 and the lower end portion of the battery cell 50. .. The cushion member 11a has a function of exerting cushioning property between the battery cell 50 and the bottom portion 42, and also has a function of a protective member for preventing the heat conductive sheet 4 from being damaged by a load applied to the heat conductive sheet 4. Have. In this embodiment, the cushion member 11a is a member having a lower thermal conductivity than the heat conductive sheet 4. In this embodiment, the hollow portion 12 is formed in a circular cross-sectional shape, but the cross-sectional shape of the hollow portion 12 is not limited to a circle, for example, a polygon, an ellipse, a semicircle, and a rounded apex. It may be a substantially polygonal shape or the like. Further, the hollow portion 12 may be composed of a plurality of hollow portions, for example, a hollow portion having a semicircular cross section of two having a circular cross section divided into two vertically or horizontally.

In the heat radiating structure 1a, as shown in FIG. 4A, a plurality of heat radiating members 5 are arranged side by side on the heat conductive sheet 4 in a direction orthogonal to the length direction thereof. That is, in the heat radiating structure 1a, a plurality of heat radiating members 5 are arranged on the heat conductive sheet 4 in parallel with the longitudinal direction of the battery cell 50 (depth direction in FIG. 5). Here, 19 heat radiating members 5 are arranged on the heat conductive sheet 4 (see FIG. 5), but the number of heat radiating members 5 arranged on the heat conductive sheet 4 is not limited to 19.

The plurality of heat radiating members 5 constituting the heat radiating structure 1a have a substantially cylindrical shape when the battery cell 50 is not mounted, but when the battery cell 50 is mounted, the heat radiating member 5 is compressed by its weight and is flat. Become a form. As shown in FIG. 5, the heat radiating structure 1a provided in the battery 40b is in contact with the lower end portion of the battery cell 50 and is compressed in the vertical direction between the lower end portion and the bottom portion 42 of the housing 41. It becomes. In this state, as shown in FIG. 5B, the heat radiating member 5 is deformed, so that the lower end portion of the battery cell 50 and the heat conductive sheet 4 are in good contact with each other. The heat generated when the battery 40b is charged or discharged is transmitted from the lower end of the battery cell 50 to the heat radiating member 5, the heat conductive sheet 4, the bottom 42 of the housing 41, and the cooling member 45. In this way, effective heat removal of the battery cell 50 is realized. In the heat radiating structure 1a, the heat radiating member 5 may be arranged in the housing 41 with the heat radiating member 5 facing the cooling member 45 side (may be referred to as the bottom 42 side) and the heat conductive sheet 4 facing the battery cell 50 side. good.

The heat radiating structure 1a configured in this way can adapt to various forms of the battery cell 50 due to the cushion member 11a, and can have high elastic deformability. Further, since the heat radiating structure 1a can store the heat from the battery cell 50 in the heat storage capsule 3 contained in the cushion member 11a, the heat radiating to the outside is suppressed or delayed while the battery cell 50 is appropriately cooled. Can be made to. Therefore, the heat radiating structure 1a can suppress a rapid temperature rise of the battery 40b, and can enhance the heat radiating of the battery cell 50 through the heat storage effect. Further, the heat radiating structure 1a becomes lighter due to the hollow portion 12.

(Third Embodiment)
Next, the heat radiating structure according to the third embodiment and the battery including the heat radiating structure will be described. The parts common to each of the above embodiments are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 6 is a plan view (6A) of the heat radiating structure according to the third embodiment, a sectional view taken along line CC (6B) in the (6A), and an enlarged view (6C) of a region D in the sectional view. Each is shown. FIG. 7 shows a vertical cross-sectional view (7A) of the heat radiating structure according to the third embodiment and a battery including the heat radiating structure, and the heat radiating structure before and after compressing the heat radiating structure by the battery cell in the (7A). The cross-sectional view (7B) of the morphological change is shown respectively.

Unlike the heat radiating structure 1a according to the second embodiment, the heat radiating structure 1b according to the third embodiment has a plurality of heat radiating members 5a connected by threads 15 in a direction orthogonal to the length direction thereof. Further, unlike the heat radiating member 5 according to the second embodiment, the heat radiating member 5a further includes a heat conductive sheet 10 in addition to the cushion member 11a. In the battery 40c according to the third embodiment, the configurations other than the heat radiating structure 1b are the same as those in the above-described embodiment, so detailed description thereof will be omitted.

The heat radiating member 5a is a member provided with a heat conductive sheet 10 on the outer periphery of the cylinder of the cushion member 11a. The heat conductive sheet 10 is a strip-shaped sheet provided on the cushion member 11a in a shape that advances while being wound in a spiral shape. The heat radiating member 5a contains the heat storage capsule 3 in the cushion member 11a as in the second embodiment. Further, the surface of the heat conductive sheet 10 preferably has a heat conductive oil for increasing the heat conductivity from the battery cell 50 in contact with the surface to the surface. Since the cushion member 11a has the same configuration as the cushion member 11a of the second embodiment in the third embodiment, detailed description thereof will be omitted. Further, in the third embodiment, the heat conductive sheet 10 has the same configuration as the heat conductive sheet 4 of the second embodiment except for its shape, and therefore detailed description thereof will be omitted.

(thread)
The thread 15 is preferably a thread that can withstand a temperature rise due to heat dissipation from the battery cell 50. More specifically, the yarn 15 is a yarn that can withstand a high temperature of about 120 ° C., and is preferably composed of twisted yarns made of fibers such as natural fibers, synthetic fibers, carbon fibers, and metal fibers. The thread 15 is an example of a connecting member that regulates the heat radiating members 5a so as not to move freely with each other. The thread 15 includes a number of rings corresponding to the number of heat radiating members 5a. The heat radiating member 5a is inserted into the ring. A regulation unit 17 that regulates the spread of the wheels is provided at the connecting portion of the plurality of wheels (see FIG. 6 (6C)). The regulating unit 17 may be a knot of the thread 15 or a member made of a resin, metal, ceramics, wood, or the like separate from the thread 15. Even if the heat radiating member 5a is compressed by the battery cell 50 and becomes flat, the heat radiating structure 1b follows and adheres to the surface of the battery cell 50 because the thread 15 bends following the deformation of the heat radiating member 5a. be able to. Further, the heat radiating structure 1b is provided with the regulating portion 17 between the plurality of heat radiating members 5a, so that the follow-up / adhesion to the surface of the battery cell 50 can be further improved. The thread 15 does not necessarily have to have the regulation unit 17.

(Thermal conductive oil)
The thermally conductive oil preferably contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and consisting of one or more of metal, ceramics or carbon. The heat conductive sheet 10 has a gap (hole or recess) microscopically. Normally, air is present in the gap, which may adversely affect the thermal conductivity. The heat conductive oil fills the gap and exists in place of air, and has a function of improving the heat conductivity of the heat conductive sheet 10.

The heat conductive oil is provided on the surface of the heat conductive sheet 10, at least the surface where the battery cell 50 and the heat conductive sheet 10 come into contact with each other. In the present application, the "oil" of the thermally conductive oil refers to a combustible substance that is liquid or semi-solid at room temperature (any temperature in the range of 20 to 25 ° C.) that is water-insoluble. Instead of the word "oil", "grease" or "wax" can also be used. The heat conductive oil is an oil having a property that does not interfere with heat conduction when heat is transferred from the battery cell 50 to the heat conductive sheet 10. As the heat conductive oil, a hydrocarbon-based oil or a silicone oil can be used. The thermally conductive oil preferably contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and consisting of one or more of metal, ceramics or carbon.

Silicone oils preferably consist of molecules with a linear structure having a siloxane bond of 2000 or less. Silicone oils are roughly classified into straight silicone oils and modified silicone oils. Examples of the straight silicone oil include dimethyl silicone oil, methyl phenyl silicone oil, and methyl hydrogen silicone oil. Examples of the modified silicone oil include reactive silicone oil and non-reactive silicone oil. Reactive silicone oils include, for example, various silicone oils such as amino-modified type, epoxy-modified type, carboxy-modified type, carbinol-modified type, methacryl-modified type, mercapto-modified type, and phenol-modified type. The non-reactive silicone oil includes various silicone oils such as a polyether-modified type, a methylstyryl-modified type, an alkyl-modified type, a higher fatty acid ester-modified type, a hydrophilic special-modified type, a higher fatty acid-containing type, and a fluorine-modified type. Since silicone oil is an oil having excellent heat resistance, cold resistance, viscosity stability, and thermal conductivity, it is applied to the surface of the thermal conductive sheet 10 and interposed between the battery cell 50 and the thermal conductive sheet 10. It is particularly suitable as a thermally conductive oil.

The thermally conductive oil preferably contains, in addition to the oil, a thermally conductive filler composed of one or more of metal, ceramics or carbon. Examples of the metal include gold, silver, copper, aluminum, beryllium, and tungsten. Examples of ceramics include alumina, aluminum nitride, cubic boron nitride, and hexagonal boron nitride. Examples of carbon include diamond, graphite, diamond-like carbon, amorphous carbon, and carbon nanotubes.

The heat conductive oil is preferably interposed between the battery cell 50 and the heat conductive sheet 10 as well as between the heat conductive sheet 10 and the housing 41. The heat conductive oil may be applied to the entire surface of the heat conductive sheet 10 or may be applied to a part of the heat conductive sheet 10. The method for allowing the heat conductive oil to exist in the heat conductive sheet 10 is not particularly limited, and any method such as spraying with a spray, coating with a brush, or immersing the heat conductive sheet 10 in the heat conductive oil. It may be due to. The heat conductive oil is not an essential configuration for the heat radiating structure 1b or the battery 40c, but is an additional configuration that can be suitably provided. This also applies to the fourth and subsequent embodiments.

The distance L1 between the heat radiating members 5a becomes narrow when the heat radiating member 5a is crushed by being pressed by the battery cell 50. If the heat radiating member 5a is hardly crushed, the adhesion between the heat conductive sheet 10 and the battery cell 50 and the bottom portion 42 may be low. The thickness of the heat radiating member 5a suitable for reducing such risk when compressed in the vertical direction, that is, in the vertical direction from the bottom of the battery cell 50 toward the surface of the bottom 42 is at least the pipe diameter of the heat radiating member 5a (=). Yen-equivalent diameter: 80% of D). Here, the "circle-equivalent diameter" means the diameter of a perfect circle having the same area as the cross-sectional area of the pipe when the heat radiating member 5a is cut perpendicular to the length direction thereof. When the heat radiating member 5a is a cylinder having a perfect circular cross section, its diameter is the same as the circle-equivalent diameter. Upon receiving the above compression, the heat radiating member 5a can be regarded as being deformed so that the surface in contact with the battery cell 50 and the bottom portion 42 is a flat surface and the direction of the distance L1 between the heat radiating members 5a is a substantially arc cross section (FIG. 6 (6C)). When the heat radiating member 5a is crushed to a thickness of 0.8D corresponding to 80% of the circle-equivalent diameter D, how much the heat radiating member 5a expands in the direction of the distance L1 is calculated. As shown in FIG. 6 (6C), in the crushed heat radiating member 5a, the total length of the semi-arcs existing in the left-right direction is 0.8πD. Further, since the length of the plane in contact with the bottom portion 42 is half the length obtained by subtracting the total length of the above-mentioned semicircular arc from the circumference of the pipe of the heat radiating member 5a, (πD-0.8πD) / 2 = 0.314D. The length of the arc portion extended in the left-right direction of the plane is 0.4D × 2 = 0.8D. Therefore, the distance that the crushed heat radiating member 5a extends from the original heat radiating member 5a in the direction of the distance L1 is 0.314D + 0.8D−D = 0.114D. If the distance L1 is made sufficiently large, the heat radiating member 5a does not come into contact with the adjacent heat radiating member 5a. On the contrary, if the distance L1 is too small, even if the heat radiating member 5a is compressed in the vertical direction, it may come into contact with the adjacent heat radiating member 5a and not be further crushed. If the distance L1 is set to 11.4% or more of the circle-equivalent diameter D of the heat-dissipating member 5a, the heat-dissipating members 5a come into contact with each other when the heat-dissipating member 5a is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed. Therefore, it is possible to prevent the deformation from becoming an obstacle. In this embodiment, the distance L1 is set to 0.6D.

FIG. 8 shows a diagram for explaining a part of the method for manufacturing the heat radiating structure according to the third embodiment. In FIG. 8, a gap is drawn between the heat conductive sheets 10 in order to give priority to visibility, but the gap may not be provided.

First, the cushion member 11a containing the heat storage capsule 3 is molded. Next, the strip-shaped heat conductive sheet 10 is spirally wound around the outer surface of the cushion member 11a. At this time, in an uncured state in which the cushion member 11a is not completely cured, the heat conductive sheet 10 is wound around the outer surface of the cushion member 11a, and then the cushion member 11a is completely cured by heating. Then, if there is a portion protruding from both ends of the cushion member 11a of the band-shaped heat conductive sheet 10, it is cut. Finally, the heat conductive oil is applied to the surface of the heat conductive sheet 10. By manufacturing the heat radiating member 5a in this way, the uncured cushion member 11a is cured in the microscopic gap of the heat conductive sheet 10, so that the cushion member does not need to use an adhesive or the like. The 11a and the heat conductive sheet 10 can be firmly fixed.

The heat radiating member 5a thus completed has a form protruding from the outer surface of the cushion member 11a by the thickness of the heat conductive sheet 10. However, the heat conductive sheet 10 and the cushion member 11a may be flush with each other. Further, the heat conductive oil may be applied to at least the surface of the heat conductive sheet 10 in contact with the battery cell 50. The step of cutting the portion of the heat conductive sheet 20 protruding from both ends of the cushion member 11a and the step of applying the heat conductive oil are not limited to those performed at the above timings, and at least the heat conductive sheet 10 is attached to the cushion member 11a. You may go anytime after winding. Further, the heat conductive sheet 10 may be wound around the outer surface of the cushion member 11a in a completely cured state. In this case, if the outer surface of the cushion member 11a does not have adhesiveness, the heat conductive sheet 10 may be fixed to the cushion member 11a using an adhesive or the like.

The heat radiating structure 1b is manufactured by connecting a plurality of heat radiating members 5a manufactured by the above-mentioned manufacturing method with a thread 15 in a state of arranging them in a direction orthogonal to the length direction of the heat radiating member 5a. More specifically, the heat radiating structure 1b is connected by hand-sewn with a thread 15 in a state where a plurality of heat radiating members 5a are arranged side by side. At this time, it is preferable that the plurality of heat radiating members 5a are arranged so that the distance L1 between the heat radiating members 5a is 0.114D or more (see FIG. 6 (6C)). Further, it is preferable to sew so that the regulating portion 17 is formed between the plurality of heat radiating members 5a.

In this way, in the heat radiating structure 1b, since a plurality of heat radiating members 5a are connected in a bamboo blind shape, the heat radiating member 5a follows the surface of the battery cell 50 in the vertical and horizontal directions in the state of being compressed by the battery cell 50. When it is crushed and the battery cell 50 is removed, it can return to its original shape due to the elastic force of the heat radiating member 5a (see FIG. 7). Further, since the heat radiating structure 1b is positioned by connecting the plurality of heat radiating members 5a in a bamboo blind shape, the heat radiating member 5a can be surely brought into contact with each battery cell 50. Therefore, the heat radiating structure 1b can suppress a situation in which the heat radiating members 5a are unevenly distributed due to, for example, vibration of an automobile, and can improve the uniformity of heat radiating properties in each of a large number of battery cells 50. Further, since each heat radiating member 5a has a structure in which the heat conductive sheet 10 is spirally wound around the outer surface of the cushion member 11a, the heat radiating structure 1b does not excessively restrain the deformation of the cushion member 11a.

(Fourth Embodiment)
Next, the heat radiating structure according to the fourth embodiment and the battery including the heat radiating structure will be described. The parts common to each of the above embodiments are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 9 shows a plan view of the heat radiating structure according to the fourth embodiment. 10A is a side view (10A) of the heat radiating structure shown in FIG. 9 viewed from the direction of arrow E, a side view (10B) of the heat radiating structure shown in FIG. 9 seen from the direction of arrow F, and the side view (10B). An enlarged view (10C) of the region G in 10B) is shown.

The heat radiating structure 1c according to the fourth embodiment includes a plurality of heat radiating members 5a, a thread 15 for connecting the heat radiating members 5a to each other, and a frame 30 for fixing the plurality of heat radiating members 5a with the thread 25. In the heat radiating structure 1c according to the fourth embodiment, the heat radiating member 5a and the thread 15 are the same as those in the third embodiment, so detailed description thereof will be omitted. In the battery 40d according to the fourth embodiment, the configurations other than the heat radiating structure 1c are the same as those in the above-described embodiment, so illustration and detailed description thereof will be omitted.

(Frame body)
The frame 30 is preferably a rectangular thin sheet with a preferably rectangular opening 31 in the center. The frame 30 may be made of a resin, metal, ceramics or wood typified by a thermosetting resin or a thermoplastic resin as long as it is a material that is not deformed by heat radiation from the battery cell 50. The opening 31 is a region where the battery cell 50 can press the heat radiating member 5a toward the bottom 42. The opening 31 is preferably large enough to allow the battery cell 50 to be inserted. However, the opening 31 may have a size that does not allow the battery cell 50 to be inserted. The plurality of heat radiating members 5a are fixed to the frame body 30 in a state of bridging the openings 31 of the frame body 30. More specifically, the plurality of heat radiating members 5a are sewn so that the thread 25 reaches the hollow portion 12 of the heat radiating member 5a with both ends in the length direction placed on the opposite sides of the frame body 30. Is fixed.

The material of the thread 25 is not particularly limited, but the thread 25 is preferably a thread that can withstand a temperature rise due to heat dissipation from the battery cell 50. The thread 25 is preferably sewn with a plurality of heat radiating members 5a on the above-mentioned facing sides using a sewing machine or the like. The sewing method of the thread 25 is not particularly limited, and any sewing method such as hand sewing, lock stitching, zigzag stitching, single chain stitching, double chain stitching, overlock stitching, flat stitching, safety stitching, and overlock stitching may be used. Further, according to the display symbols specified by JIS L 0120, suitable sewing methods are "101", "209", "301", "304", "401", "406", "407", and "410". , "501", "502", "503", "504", "505", "509", "512", "514", "602" and "605" It can be illustrated.

The heat radiating structure 1c enables positioning of the plurality of heat radiating members 5a in the heat radiating structure 1c by fixing the plurality of heat radiating members 5a to the frame body 30, and also plays a role of connecting the plurality of heat radiating members 5a. In order to realize high heat transfer efficiency, it is desirable to dissipate heat uniformly from each of the large number of battery cells 50 so that the temperature of each of the large number of battery cells 50 becomes uniform. For that purpose, it is preferable to arrange a plurality of heat radiating members 5a so that the number of heat radiating members 5a in contact with each battery cell 50 is uniform. In the heat radiating structure 1c, since the plurality of heat radiating members 5a are positioned by the frame body 30, the heat radiating members 5a can be surely brought into contact with each battery cell 50. Therefore, the heat dissipation structure 1c can enhance the uniformity of heat dissipation in each of a large number of battery cells 50, and can realize high heat transfer efficiency. Only one end of the heat radiating member 5a in the length direction may be fixed to one side of the frame body 30.

The frame body 30 is preferably formed so that its thickness T is thinner than the thickness (0.8D) of the heat radiating member 5a deformed by pressing from the battery cell 50 (see FIG. 10 (10C)). By configuring the heat radiating structure 1c in this way, even if the heat radiating member 5a is compressed in the vertical direction by pressing from the battery cell 50, there is a risk that the battery cell 50 will come into contact with the frame 30 and will not be further crushed. It can be suppressed, and when the heat radiating member 5a is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed, it can be prevented from becoming an obstacle to the deformation. Since both ends of the heat radiating member 5a in the length direction are placed and fixed on the frame body 30, both ends do not come into contact with the bottom portion 42 of the housing 41. However, since the region between both ends of the heat radiating member 5a is in contact with the bottom portion 42, a sufficient heat radiating effect can be obtained. Further, it is preferable that the surface of the heat radiating member 5a on the bottom 42 side is at the same height as the surface of the frame 30 on the bottom 42 side, or slightly protrudes toward the bottom 42 side. This is because the frame body 30 can be easily brought into contact with the bottom portion 12.

The heat radiating structure 1c is fixed by sewing both ends of the plurality of heat radiating members 5a in the length direction (Y direction in FIG. 9) to the frame body 30 with a thread 25. When the heat radiating structure 1c is sandwiched between the battery cell 50 and the cooling member 45, the middle region of the heat radiating member 5a (the region located between both ends fixed to the frame 30 by the thread 25) becomes the battery. Receives the weight of cell 50 and the like. As a result, the middle region sinks from the fixed side of both ends toward the opening 31, and projects equal to or more than the seat surface on the opposite side of the fixed side. Therefore, the heat radiating member 5a can come into contact with both the battery cell 50 and the cooling member 45 even when the lower ends of the plurality of battery cells 50 are not flat. Since the middle region of the heat radiating member 5a is crushed by being pressed by the battery cell 50, the heat radiating structure 1c is preferably arranged so that the battery cell 50 is in contact with the middle region. Since the heat radiating member 5a is positioned by the frame 30, the variation of the distance L1 between the heat radiating members 5a becomes small even when the heat radiating member 5a is crushed by being pressed by the battery cell 50, and the heat radiating property of each of the large number of battery cells 50 is reduced. It is possible to increase the homogenization of. The plurality of heat radiating members 5a are not limited to being arranged so that the distances L1 between the heat radiating members 5a are evenly spaced. The heat radiating structure 1c may be arranged by changing the distance L1 between the heat radiating members 5a so that the heat radiating members 5a are densely packed at the position of the battery cell 50 having a high temperature among the plurality of battery cells 50. That is, the heat radiating structure 1c is provided in the battery cell 50 having a high temperature so that the number of heat radiating members 5a in contact with the battery cell 50 having a high temperature is larger than the number of heat radiating members 5a in contact with the other battery cells 50. The distance L1 between the heat radiating members 5a that come into contact with each other may be reduced. With such a configuration, the battery 40d can further enhance the uniformity of heat dissipation in each of a large number of battery cells 50.

In this way, in the heat radiating structure 1c, since a plurality of heat radiating members 5a are connected in a bamboo blind shape, the heat radiating member 5a follows the surface of the battery cell 50 in the vertical and horizontal directions in the state of being compressed by the battery cell 50. In the state of being crushed and the battery cell 50 is removed, the original shape can be restored by the elastic force of the heat radiating member 5a. Further, in the heat radiating structure 1c, a plurality of heat radiating members 5a are connected in a bamboo blind shape, and the heat radiating structure 1c is positioned by the frame body 30. As a result, the heat radiating member 5a can be surely brought into contact with each battery cell 50. Therefore, the heat radiating structure 1c can suppress a situation in which the heat radiating members 5a are unevenly distributed due to, for example, vibration of an automobile, and can improve the uniformity of heat radiating properties in each of a large number of battery cells 50. Further, since the heat radiating structure 1c includes the frame body 30, the operator can hold the frame body 30 and attach the heat radiating structure 1c to the battery 40d, which improves workability.

(Fifth Embodiment)
Next, the heat radiating structure according to the fifth embodiment and the battery including the heat radiating structure will be described. The parts common to each of the above embodiments are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 11 shows a plan view of the heat radiating structure according to the fifth embodiment. FIG. 12 is a perspective view (12A) of a part of the heat radiating structure of FIG. 11 and an enlarged view of the region H of FIG. 11, showing a change in form (12B) before and after compressing the heat radiating structure.

In the heat radiating structure 1d according to the fifth embodiment, a plurality of heat radiating members 5b are connected with a gap. The heat radiating member 5b is a substantially cylindrical member provided with a heat conductive sheet 10a on the outer periphery of the cylinder of the cushion member 11a. However, the heat radiating member 5b may be a cylindrical member having an elliptical shape or a polygonal shape having a triangle or more in the end face shape in the length direction. The heat radiating member 5b contains the heat storage capsule 3 in the cushion member 11a as in the above-described embodiment. In the fifth embodiment, since the cushion member 11a has the same configuration as the cushion member 11a of the above-described embodiment, detailed description thereof will be omitted.

The heat conductive sheet 10a covers the outer periphery of the cylinder of the cushion member 11a in a state where the first gap 100 is along the length direction of the cushion member 11a and has the first gap 100 corresponding to the thickness of the heat conductive sheet 10a. (See FIG. 12 (12A)). The first gap 100 is formed in a direction other than the direction in which the plurality of heat radiating members 5b are connected (the left-right direction in FIG. 11). More preferably, the first gap 100 is formed in the heat conductive sheet 10a in a direction substantially perpendicular to the connecting direction of the heat radiating members 5b (in the vertical direction in FIG. 11). The first gap 100 is formed on the outer surface (outer circumference of the cylinder) of the heat radiating member 5b along the length direction of the heat radiating member 5b. The first gap 100 may be referred to as a “cut” and is a portion that does not completely cover the outer surface of the cushion member 11a. In this embodiment, the first gap 100 is a long window that exposes a part of the outer surface of the cushion member 11a. The first gap 100 has a function of facilitating deformation of the heat conductive sheet 10a and suppressing cracking when a compressive force is applied from the outside of the heat radiating member 5b. The surface of the heat conductive sheet 10a preferably has a heat conductive oil for increasing the heat conductivity from the battery cell 50 in contact with the surface to the surface. The cushion member 11a is more easily deformed according to the surface shape of the battery cell 50 than the heat conductive sheet 10a, and has a hollow portion 12. In FIG. 11, the heat radiating structure 1d includes 18 heat radiating members 5b, but the number of heat radiating members 5b does not matter as long as it is two or more. Further, since the heat conductive sheet 10a has the same configuration as the heat conductive sheet 10 of the above-described embodiment except for its shape, detailed description thereof will be omitted.

Similar to the heat radiating member 5a of the third embodiment, the plurality of heat radiating members 5b have one or two or more heat radiating members 5b in the length direction orthogonal to the length direction of the heat radiating member 5b. It is connected by a thread 15. Since the thread 15 has the same structure as the thread 15 of the third embodiment, detailed description thereof will be omitted.

(Modification 2 of the fifth embodiment)
FIG. 13 shows a modified example 2 of the heat radiating structure according to the fifth embodiment in the same field of view as in FIG. 12 (12B).

The heat radiating structure 1e according to the second modification is formed by connecting a plurality of heat radiating members 5c. The heat radiating member 5c includes a cushion member 11b inside a cylindrical heat conductive sheet 10a having a first gap 100. The cushion member 11b has a second gap 110 connected to the hollow portion 12 at the position of the first gap 100 of the heat conductive sheet 10a. The second gap 110 is an opening that cuts the thickness of the cushion member 11b. As a result, the hollow portion 12 communicates with the outside world through the second gap 110 and the first gap 100. As described above, in the heat radiating structure 1e, the cushion member 11b has a tubular shape with a part of the outer surface opened, similarly to the heat conductive sheet 10a. Therefore, the deformability of the cushion member 11b is further enhanced. The second gap 110 may be an opening that does not communicate with the first gap 100.

The battery according to the fifth embodiment will be described.

FIG. 14 shows a vertical cross-sectional view of a battery including the heat radiating structure according to the fifth embodiment. FIG. 15 shows an enlarged view of the region I of FIG. In FIG. 15, of the heat radiating structures 1d and 1e, the heat radiating structure 1d is shown as an example. Further, in FIG. 15, a part of the heat radiating member 5b is enlarged and shown.

Similar to the above-described embodiment, the battery 40e according to the fifth embodiment includes a battery cell 50 as one or two or more heat sources in a housing 41 having a structure for flowing the cooling member 45, and the battery cell 50 and the battery cell 50. The heat radiating structures 1d and 1e are provided between the housing 41 and the housing 41. The heat radiating structures 1d and 1e are made of batteries so that both sides of the first gap 100 in the heat conductive sheet 10a come into contact with either the battery cell 50 or the housing 41 (specifically, the bottom 42 in this embodiment). It is provided between the cell 50 and the housing 41.

The heat radiating structures 1d and 1e are provided in the housing 41 in a state of being sandwiched between the battery cell 50 and the bottom portion 42 with the first gap 100 of the heat radiating members 5b and 5c facing the battery cell 50 side. Therefore, the heat from the battery cell 50 is transferred from the first gap 100 of the heat conductive sheet 10a to the bottom 42 along the circumferences on both sides (see the routes of J1 and J2 in the figure). Therefore, the heat transfer route can be increased as compared with the case where the first gap 100 is formed at a position where only one side portion of the first gap 100 is in contact with the battery cell 50, and thus the heat transfer route can be increased from the battery cell 50. The heat dissipation of the battery can be further improved.

(Modification 3 of the fifth embodiment)
FIG. 16 shows a modified example 3 of the battery including the heat radiating structure according to the fifth embodiment in the same field of view as in FIG. In FIG. 16, of the heat radiating structures 1d and 1e, the heat radiating structure 1d is shown as an example. Further, in FIG. 16, a part of the heat radiating member 5b is enlarged and shown.

In the battery 40f according to the third modification, the heat radiating structures 1d and 1e are arranged so that the first gap 100 of the heat radiating members 5b and 5c faces the bottom 42 side. Even in such an arrangement type, the heat from the battery cell 50 is transmitted to the bottom 42 along the circumferences on both sides of the first gap 100 (see the routes of J1 and J2 in the figure). Therefore, similar to the battery 40e according to the fifth embodiment, the heat dissipation from the battery cell 50 can be further improved.

(Sixth Embodiment)
Next, the heat radiating structure according to the sixth embodiment and the battery including the heat radiating structure will be described. The parts common to each of the above embodiments are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 17 shows a plan view of the heat radiating structure according to the sixth embodiment.

The heat radiating structure 1f according to the sixth embodiment includes a plurality of heat radiating members 5b, a thread 25 for connecting the heat radiating members 5b to each other, and a frame 30 for fixing the plurality of heat radiating members 5b with the thread 25. In the heat radiating structure 1f according to the sixth embodiment, the heat radiating member 5b is the same as that of the fifth embodiment, and therefore detailed description thereof will be omitted. Further, since the frame body 30 and the thread 25 are the same as those in the fourth embodiment, detailed description thereof will be omitted. In the battery 40g according to the sixth embodiment, the configurations other than the heat radiating structure 1f are the same as those in the above-described embodiment, so illustration and detailed description thereof will be omitted.

The plurality of heat radiating members 5b are fixed to the frame body 30 in a state of bridging the openings 31 of the frame body 30. More specifically, the plurality of heat radiating members 5b are fixed by the threads 25 in a state where both ends in the length direction are placed on the opposite sides of the frame body 30. Further, the plurality of heat radiating members 5b are provided not only at both ends in the length direction thereof, but also in the middle region of the heat radiating member 5 (a region located in the middle of both ends fixed to the frame 30 by the thread 25). The thread 25 is sewn and connected to the hollow portion 12 of the heat radiating member 5b so as to reach the hollow portion 12.

Similar to the fourth embodiment, the frame body 30 is preferably formed so that its thickness T is thinner than the thickness (0.8D) of the heat radiating member 5b deformed by pressing from the battery cell 50. By configuring the heat radiating structure 1f in this way, as in the case of the heat radiating structure 1c according to the fourth embodiment, even if the heat radiating member 5b is compressed in the vertical direction by pressing from the battery cell 50, the battery cell 50 is framed. It is possible to suppress the possibility that the heat radiating member 5b will come into contact with the body 30 and not be further crushed, and it will be possible to prevent the heat radiating member 5b from becoming an obstacle to the deformation when it is compressed to a thickness of 80% of the circle-equivalent diameter D and deformed.

By configuring the heat dissipation structure 1f in this way, it is possible to improve the uniformity of heat dissipation in each of a large number of battery cells 50, and to realize high heat transfer efficiency, as in the case of the heat dissipation structure 1c according to the fourth embodiment. .. Further, since the heat radiating structure 1f includes the frame body 30, the operator can hold the frame body 30 and attach the heat radiating structure 1f to the battery 40 g, which improves workability. Only one end of the heat radiating member 5b in the length direction may be fixed to one side of the frame body 30.

(Action / effect of each embodiment)
As described above, when the heat radiating structures 1,1a, 1b, 1c, 1d, 1e, 1f (heat radiating structures 1,1a, 1b, 1c, 1d, 1e, 1f are collectively referred to, "heat radiating structure" (Also referred to as "1st class") is a heat dissipation structure located between the battery cell 50 and the cooling member 45, which conducts heat from the battery cell 50 to the cooling member 45 to enable heat dissipation from the battery cell 50, and is made of rubber. A heat storage material that stores heat by phase transition is enclosed in microcapsules in cushion members 11, 11a, 11b (also referred to as "cushion member 11 and the like" when the cushion members are collectively referred to) composed of a state elastic body. Contains the heat storage capsule 3.

By configuring the heat radiating structure 1 and the like in this way, the heat from the battery cell 50 can be stored in the heat storage capsule 3. Therefore, the heat dissipation structure 1 and the like can suppress or delay heat dissipation to the outside while appropriately cooling the battery cell 50, so that the batteries 40, 40a, 40b, 40c, 40d, 40e, 40f, 40g (battery). In the case of generically, it is possible to suppress a rapid temperature rise of (also referred to as "battery 40 or the like"). Further, since the heat radiating structure 1 and the like are composed of the cushion member 11 and the like, in the state of being compressed by the battery cell 50, the heat radiating structure 1 and the like follow the surface of the battery cell 50 and are crushed in the vertical and horizontal directions, and the battery cell 50 is crushed. In the removed state, the original shape can be restored by the elastic force of the cushion member 11 or the like. Therefore, the heat radiating structure 1 and the like can adapt to various forms of the battery cell 50, are highly elastically deformable, and can enhance the heat radiating of the battery cell 50 through the heat storage effect.

Further, the heat radiating structures 1a, 1b, 1c, 1d, 1e, 1f (when the heat radiating structures 1a, 1b, 1c, 1d, 1e, 1f are collectively referred to as "heat radiating structure 1a, etc."), A plurality of heat radiating members 5, 5a, 5b, 5c provided with cushion members 11a, 11b are connected to each other, and the cushion members 11a, 11b are long tubular members having hollow portions 12 in the length direction thereof. be. Therefore, the heat radiating structure 1a and the like can adapt to various forms of the battery cell 50 due to the cushion members 11a and 11b, and can have high elastic deformability. Further, since the heat radiating structure 1a and the like can store the heat from the battery cell 50 in the heat storage capsule 3 contained in the cushion members 11a and 11b, the heat radiating to the outside is dissipated while appropriately cooling the battery cell 50. It can be suppressed or delayed, and the heat dissipation of the battery cell 50 can be enhanced through the heat storage effect. Further, the heat radiating structure 1a and the like are lighter due to the hollow portion 12.

Further, the heat radiating members 5a, 5b, 5c constituting the heat radiating structures 1b, 1c, 1d, 1e, 1f further include heat conductive sheets 10, 10a containing at least one of metal, carbon, and ceramics. The cushion members 11a and 11b are more easily deformed according to the surface shape of the battery cell 50 than the heat conductive sheets 10 and 10a. The heat conductive sheets 10 and 10a are sheets for transferring heat from the battery cell 50, and are provided on the outer periphery of the cylinder of the cushion members 11a and 11b. Therefore, the heat radiating structures 1b, 1c, 1d, 1e, and 1f are high because the heat conductive sheets 10 and 10a are provided on the outer periphery of the cylinder of the cushion members 11a and 11b, so that they can easily adapt to various forms of the battery cell 50. Heat dissipation efficiency can be realized.

Further, since the heat conductive sheet 10 constituting the heat radiating structures 1b and 1c is provided on the outer periphery of the cylinder of the cushion member 11a in a shape that advances while winding in a spiral shape, a situation in which the deformation of the cushion member 11a is excessively restrained is prevented. Can be suppressed.

Further, the heat conductive sheet 10a constituting the heat radiating structures 1d, 1e, 1f is a first gap 100 along the length direction of the cushion members 11a, 11b, and is a first gap 100 corresponding to the thickness of the heat conductive sheet 10a. The cushion members 11a and 11b are provided so as to cover the outer periphery of the cylinder. Further, the first gap 100 is formed in a direction other than the direction in which the plurality of heat radiating members 5b are connected. Therefore, in the heat radiating structures 1d, 1e, 1f, the heat conductive sheet 10a is easily deformed and suppressed from cracking when a compressive force is applied from the outside of the heat radiating member 5b by the first gap 100. Can be done.

Further, since the cushion member 11b constituting the heat radiating structure 1e has a second gap 110 connected to the hollow portion 12 at the position of the first gap 100 of the heat conductive sheet 10a, the deformability of the cushion member 11b is further enhanced. It is possible to prevent the heat conductive sheet 10a from cracking when a compressive force is applied from the outside of the heat radiating member 5c.

Further, since the plurality of heat radiating members 5a, 5b, 5c constituting the heat radiating structures 1b, 1c, 1d, 1e, 1f are connected by the threads 15 and 25 in the direction orthogonal to the length direction thereof, a plurality of the heat radiating members 5a, 5b, 5c are connected. Since the heat radiating members 5a, 5b, 5c are connected in a bamboo blind shape, for example, the situation where the heat radiating members 5a, 5b, 5c are unevenly distributed due to the vibration of an automobile or the like can be suppressed, and the workability is improved.

Further, since the plurality of heat radiating members 5a and 5b constituting the heat radiating structures 1c and 1f are fixed to the frame body 30 in a state of bridging the opening 31 of the frame body 30, the operator can use the frame body 30. The heat dissipation structures 1c and 1f can be attached to the batteries 40d and 40g, improving workability.

Further, the frame body 30 constituting the heat radiating structures 1c and 1f is formed so that the thickness T thereof is thinner than the thickness of the heat radiating members 5a and 5b deformed by the pressing from the battery cell 50. Therefore, the battery cell 50 Even if the heat radiating members 5a and 5b are compressed in the vertical direction by the pressing from the battery cell 50, it is possible to suppress the possibility that the battery cell 50 comes into contact with the frame body 30 and is not further crushed.

Further, the surface of the heat conductive sheets 10 and 10a has a heat conductive oil for increasing the heat conductivity from the battery cell 50 in contact with the surface to the surface. The heat conductive sheets 10 and 10a have gaps (holes or recesses) microscopically. Normally, air is present in the gap, which may adversely affect the thermal conductivity. The heat conductive oil fills the gap and exists in place of air, and has a function of improving the heat conductivity of the heat conductive sheets 10 and 10a.

Further, the heat conductive oil includes a silicone oil and a heat conductive filler having a higher heat conductivity than the silicone oil and composed of one or more of metal, ceramics or carbon. Since silicone oil is an oil having excellent heat resistance, cold resistance, viscosity stability, and thermal conductivity, it is applied to the surface of the thermal conductive sheets 10 and 10a to form a battery cell 50 and the thermal conductive sheets 10 and 10a. It is particularly suitable as a heat conductive oil to be interposed between them. Further, since the heat conductive oil contains a heat conductive filler, the heat conductivity of the heat conductive sheets 10 and 10a can be enhanced.

The battery 40 or the like is a battery having one or more battery cells 50 as heat sources in a housing 41 having a structure for flowing a cooling member 45, and is located between the battery cells 50 and the housing 41. The above-mentioned heat dissipation structure 1 and the like are provided. By configuring the battery 40 and the like in this way, the heat from the battery cell 50 can be stored in the heat storage capsule 3, so that the heat dissipation to the outside can be suppressed or delayed while the battery cell 50 is appropriately cooled. , The sudden temperature rise of the battery 40 and the like can be suppressed. Further, the battery 40 and the like are crushed in the vertical and horizontal directions following the surface of the battery cell 50 in a state of being compressed by the battery cell 50 due to the cushion member 11 and the like, and the battery cell 50 is removed. In, the original shape can be restored by the elastic force of the cushion member 11 or the like. Therefore, the battery 40 and the like can adapt to various forms of the battery cell 50, are highly elastically deformable, and can enhance heat dissipation of the battery cell 50 through the heat storage effect.

(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. 18 shows a diagram for explaining a modified example 4 of the heat radiating structure according to the third embodiment and the fourth embodiment and a method for manufacturing the same.

The heat radiating structure according to the fourth modification includes a heat radiating member 5d different from the heat radiating structures 1b and 1c according to the third embodiment and the fourth embodiment. The heat radiating member 5d provided in the heat radiating structure according to the fourth modification is a band-shaped cushion member provided on the back side of the heat conductive sheet 10 without using the cushion member 11a as a tubular cushion member, and together with the heat conductive sheet 10. A spiral cushion member that is wound in a spiral shape. Since the configurations other than the heat radiating member 5d are the same as those of the heat radiating structures 1b and 1c, detailed description thereof will be omitted.

An example of a method for manufacturing a heat radiating structure including the above-mentioned spiral cushion member 11a (also referred to as “spiral cushion member 11a” or simply “cushion member 11a”) is as follows.

First, a laminate composed of two layers of a heat conductive sheet 10 and a cushion member 11a having substantially the same width is manufactured. Next, the heat conductive oil is applied to the surface of the heat conductive sheet 10. Then, the laminate coated with the heat conductive oil is wound in a spiral shape (may be called a coil shape) so as to proceed in one direction. In this way, the elongated heat-dissipating member 5d in which the laminated body is wound in a spiral shape is completed. The heat conductive oil may be applied on the heat conductive sheet 10 before the laminate is manufactured, or may be finally applied on the heat conductive sheet 10. Further, in the laminated body, preferably, the heat conductive sheet 10 is laminated on the cushion member 11a in an uncured state in which the cushion member 11a is not completely cured, and then the cushion member 11a is completely cured by heating. Is formed.

The heat radiating structure is a state in which a plurality of heat radiating members 5d manufactured by the above-mentioned manufacturing method are arranged in a direction orthogonal to the direction in which the heat conductive sheet 10 is wound and travels (the length direction of the heat radiating member 5d). It is manufactured by connecting with a thread 15. Further, when the frame body 30 is provided as in the heat radiating structure 1c according to the fourth embodiment, it is manufactured by sewing a plurality of heat radiating members 5d connected by the thread 15 to the frame body 30 with the thread 25. ..

The heat radiating member 5d is provided with a hollow portion 12a in the length direction thereof, but unlike the hollow portion 12 included in the heat radiating member 5a according to the third embodiment and the fourth embodiment, the heat radiating member 5d is also provided in the outer surface direction of the heat radiating member 5d. It penetrates. Since the heat radiating member 5d has a spiral shape, it is easier to expand and contract in the length direction of the heat radiating member 5d than the heat radiating member 5a described above.

Further, for example, the heat source includes not only the battery cell 50 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 45 may be not only cooling water but also an organic solvent, liquid nitrogen, or a cooling gas. Further, the heat radiating structure 1 and the like may be arranged in a structure other than the battery 40 and the like, for example, an electronic device, a home appliance, a power generation device and the like.

Further, the heat conductive sheets 4, 10 and 10a may contain the heat storage capsule 3 in the same manner as the cushion members 11, 11a and 11b.

Further, in the second embodiment, in the heat radiating structure 1a, a plurality of heat radiating members 5 are arranged on the heat conductive sheet 4, but the present invention is not limited to this. In the heat radiating structure 1a, for example, a plurality of heat radiating members 5 may be arranged on the cushion member 11 or the heat radiating structure 1 (a member in which the heat storage capsule 3 is contained in the cushion member 11) according to the first embodiment.

Further, in the second embodiment, the heat radiating structure 1a may not include the heat conductive sheet 4 and may have a configuration in which a plurality of heat radiating members 5 are connected by threads 15 and 25.

Further, in the third embodiment and the fifth embodiment, the heat radiating structures 1b, 1d, 1e are not limited to the plurality of heat radiating members 5a, 5b, 5c being connected by the thread 15, for example, the sixth embodiment. Similar to the heat radiating structure 1f according to the embodiment, the plurality of heat radiating members 5a, 5b, 5c may be sewn and connected by, for example, a sewing machine or the like so that the thread 25 reaches the hollow portion 12. Further, in the heat radiating structure 1b, 1d, 1e, a plurality of heat radiating members 5a, 5b, 5c are connected by two threads 15, but the present invention is not limited to this, and at least one thread 15 is used. It suffices if they are connected.

Further, in the sixth embodiment, the heat radiating structure 1f is connected by sewing the middle region of the heat radiating member 5b with a sewing machine or the like so as to reach the hollow portion 12 with the thread 25. The present invention is not limited, and for example, as in the fourth embodiment, the threads 15 may be hand-sewn together. Further, in this case, the heat radiating structure 1f may be provided with the regulating portion 17 at the connecting portion of the plurality of rings formed by the thread 15. Further, in the heat radiating structure 1f, the middle region of the heat radiating member 5b is connected by one thread 25, but the present invention is not limited to this, and the middle region is not connected by the thread 25. Alternatively, it may be connected by two or more threads 25.

Further, in the fourth embodiment and the sixth embodiment, the heat radiating structures 1c and 1f do not have to include the thread 25. Further, the heat radiating structure 1c according to the fourth embodiment does not have to include the thread 15. In this case, it is preferable that both ends of the plurality of heat radiating members 5a and 5b constituting the heat radiating structures 1c and 1f in the length direction are fixed to the frame body 30 by a method such as adhesion or fitting. In this case, the frame body 30 plays a role of positioning the plurality of heat radiating members 5a and 5b in the heat radiating structures 1c and 1f and connecting the plurality of heat radiating members 5a and 5b.

Further, in the heat radiating structures 1d and 1f according to the fifth embodiment and the sixth embodiment, the heat radiating member 5b does not have to include the first gap 100.

Further, the shape of the frame 30 is not particularly limited, and any shape as long as at least one end of the plurality of heat radiating members 5a and 5b in the length direction can be fixed is, for example, an ellipse, a circle, a triangle, or a frame 30 in a plan view. It may have a polygonal outer shape of pentagon or more. In the fourth and sixth embodiments, the heat radiating members 5a and 5b are fixed to the frame 30 so that the surface of the frame 30 on the bottom 42 side is at the same position as the surface of the heat radiating members 5a and 5b on the bottom 42 side. ing. However, the frame 30 and the heat radiating members 5a and 5b may be fixed so that the surface of the frame 30 on the battery cell 50 side is at the same position as the surface of the heat radiating members 5a and 5b on the battery cell 50 side. Further, the frame 30 may be fixed at a middle position in the height direction of the heat radiating members 5a and 5b (the direction from the battery cell 50 toward the bottom 42).

Further, in the second to sixth embodiments, the situation in which the battery cell 50 is vertically arranged and the heat radiating structure 1a or the like is brought into contact with the lower end thereof has been described, but the arrangement form of the battery cell 50 is not limited to this. .. For example, the battery cell 50 may be arranged so that the side surface of the battery cell 50 is in contact with the heat radiating members 5, 5a, 5b, 5c such as the heat radiating structure 1a. The temperature of the battery cell 50 rises during charging and discharging. If the container itself of the battery cell 50 is made of a flexible material, the side surface of the battery cell 50 may bulge in particular. Even in such a case, since the heat radiating members 5, 5a, 5b, 5c constituting the heat radiating structure 1a and the like can be deformed according to the shape of the outer surface of the battery cell 50, the heat radiating property is maintained high even during charging and discharging. can.

Further, the plurality of components of each of the above-described embodiments can be freely combined except when they cannot be combined with each other. For example, the heat radiating structure 1c according to the fourth embodiment may be arranged in place of the heat radiating structure 1 according to the first embodiment.

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.

1,1a, 1b, 1c, 1d, 1e, 1f ... Heat dissipation structure, 3 ... Heat storage capsule, 4,10,10a ... Heat conduction sheet, 5,5a, 5b, 5c, 5d ... -Heat dissipation member, 11, 11a, 11b ... Cushion member, 12, 12a ... Hollow part, 15, 25 ... Thread, 30 ... Frame body, 31 ... Opening, 40, 40a, 40b, 40c, 40d, 40e, 40f, 40g ... Battery, 41 ... Housing, 50 ... Battery cell (an example of heat source), 100 ... First gap, 110 ... Second gap , T ... The thickness of the frame.

Claims (13)

A heat dissipation structure located between a heat source and a cooling member that conducts heat from the heat source to the cooling member to enable heat dissipation from the heat source.
A heat dissipation structure containing a heat storage capsule in which a heat storage material that stores heat by phase transition is enclosed in a microcapsule in a cushion member composed of a rubber-like elastic body. A plurality of heat radiating members including the cushion member are connected and configured.
The heat radiating structure according to claim 1, wherein the cushion member is a long tubular member having a hollow portion in the length direction thereof. The heat radiating member further comprises a heat conductive sheet containing at least one of metal, carbon or ceramics.
The cushion member is more easily deformed according to the surface shape of the heat source than the heat conductive sheet.
The heat radiating structure according to claim 2, wherein the heat conductive sheet is a sheet for transferring heat from the heat source, and is provided on the outer periphery of the cylinder of the cushion member. The heat radiating structure according to claim 3, wherein the heat conductive sheet contains the heat storage capsule. The heat radiating structure according to claim 3 or 4, wherein the heat conductive sheet is provided on the outer periphery of the cylinder of the cushion member in a shape that advances while being wound in a spiral shape. The heat conductive sheet is provided so as to cover the outer periphery of the cylinder of the cushion member in a state of having the first gap along the length direction of the cushion member and having the first gap corresponding to the thickness of the heat conductive sheet.
The heat radiating structure according to claim 3 or 4, wherein the first gap is formed in a direction other than the direction in which the plurality of heat radiating members are connected. The heat radiating structure according to claim 6, wherein the cushion member has a second gap connected to the hollow portion at a position of the first gap of the heat conductive sheet. The heat radiating structure according to any one of claims 2 to 7, wherein the plurality of heat radiating members are connected by a thread in a direction orthogonal to the length direction thereof. The heat-dissipating structure according to any one of claims 2 to 8, wherein the plurality of heat-dissipating members are fixed to the frame in a state of bridging the openings of the frame. The heat-dissipating structure according to claim 9, wherein the frame is formed so that its thickness is thinner than the thickness of the heat-dissipating member deformed by pressing from the heat source. The heat radiating structure according to any one of claims 3 to 10, wherein the surface of the heat conductive sheet has a heat conductive oil for increasing the heat conductivity from the heat source in contact with the surface to the surface. The heat-dissipating structure according to claim 11, wherein the thermally conductive oil contains a silicone oil and a thermally conductive filler having a higher thermal conductivity than the silicone oil and composed of one or more of metal, ceramics or carbon. A battery having one or more battery cells as heat sources in a housing having a structure for flowing a cooling member, and any one of claims 1 to 12 between the battery cells and the housing. A battery with the heat dissipation structure described in the section.

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