JPWO2019230107A1 - Heat dissipation structure and battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiating structure which is lightweight and capable of suppressing damage to parts arranged in the vicinity thereof, and a battery provided with the heat radiating structure. The present invention is a heat dissipation structure 1 located between a battery 20 and a cooling member 26, which conducts heat from the battery 20 to the cooling member 26 to enable heat dissipation from the battery 20, and is made of metal or carbon. Alternatively, a heat conductive sheet 2 containing at least one of ceramics and capable of being arranged between the battery 20 and the cooling member 26, and a heat conductive sheet 2 provided between the battery 20 and the heat conductive sheet 2 are provided as compared with the heat conductive sheet 2. A cushion member 3 that is easily deformed according to the surface shape of 20 is provided, and the cushion member 3 includes a heat-dissipating structure 1 and a heat-dissipating structure 1 in which a rubber-like elastic body contains a filler having a higher thermal conductivity than the rubber-like elastic body. Regarding the battery to be equipped. [Selection diagram] FIG. 2A

Description

Cross reference

This application claims priority based on Japanese Patent Application No. 2018-10288 filed in Japan on May 29, 2018, and the contents of the application are incorporated herein by reference. In addition, the contents described in the patents, patent applications and documents cited in the present application are incorporated herein by reference.

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

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

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), cBN, or the like, makes the cost of the circuit board extremely high. In addition, the arrangement of the cooling fan causes problems such as failure of the rotating device called the fan, maintenance necessity for preventing the failure, and difficulty in securing the installation space. On the other hand, the heat radiating fin is a simple one that can increase the surface area and further improve the heat radiating property by forming a large number of columnar or flat plate-shaped projecting portions using a metal having high thermal conductivity (for example, aluminum). Since it is a member, it is widely used as a heat-dissipating component (see Patent Document 1).

Japanese Patent Application Laid-Open No. 2008-24399

However, since the heat radiation fins as described above are made of metal, the weight tends to be large. In addition, there is a risk that the protruding portion made of metal may damage parts arranged in the vicinity such as a heat source and a cooling member.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat radiating structure that is lightweight and capable of suppressing damage to parts arranged in the vicinity, and a battery provided with the heat radiating structure. ..

(1) The heat dissipation structure according to the embodiment for achieving the above object is a heat dissipation structure that is located between the heat source and the cooling member and conducts heat from the heat source to the cooling member to enable heat dissipation from the heat source. A heat conductive sheet containing at least one of metal, carbon or ceramics and can be arranged between the heat source and the cooling member, and provided between the heat source and the heat conductive sheet, and is provided between the heat source and the heat conductive sheet, and is a heat source as compared with the heat conductive sheet. The cushion member includes a cushion member that is easily deformed according to the surface shape of the above, and the cushion member contains a filler having a higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body.

(2) In the heat dissipation structure according to another embodiment, the cushion member is preferably a rod-shaped cushion member having a recess recessed in the length direction thereof.

(3) In the heat radiating structure according to another embodiment, preferably, the recess is a through-passage that penetrates the cushion member in the length direction thereof, and the cushion member is a tubular cushion member having a through-passage.

(4) In the heat radiating structure according to another embodiment, preferably, the cushion member includes a first cushion member and a second cushion member that covers the outer surface of the first cushion member, and the second cushion member is , Higher thermal conductivity than the first cushion member.

(5) In the heat radiating structure according to another embodiment, preferably, the first cushion member is formed of a rubber-like elastic body, and the second cushion member is formed of a rubber-like elastic body containing a filler. ..

(6) In the heat radiating structure according to another embodiment, preferably, a plurality of cushion members are provided on the heat conductive sheet.

(7) The battery according to the embodiment is a battery having one or more battery cells as heat sources in a housing that contacts the cooling members, and is located between the heat source and the cooling member and is a cooling member from the heat source. A heat radiating structure that conducts heat to the heat source to enable heat dissipation from the heat source is provided, and the heat radiating structure contains at least one of metal, carbon, or ceramics, and is heat conduction that can be arranged between the heat source and the cooling member. A cushion member provided between the sheet and the heat source and the heat conductive sheet and easily deformed according to the surface shape of the heat source as compared with the heat conductive sheet is provided, and the cushion member is a rubber-like elastic body and a rubber-like material. Contains a filler that has higher thermal conductivity than an elastic body.

(8) In the battery according to another embodiment, the cushion member is preferably a rod-shaped cushion member having a recess recessed in the length direction thereof.

(9) In the battery according to another embodiment, preferably, the recess is a through-passage that penetrates the cushion member in the length direction thereof, and the cushion member is a tubular cushion member having a through-passage.

(10) In the battery according to another embodiment, preferably, the cushion member includes a first cushion member and a second cushion member that covers the outer surface of the first cushion member, and the second cushion member is a first cushion member. 1 Higher thermal conductivity than cushion members.

(11) In the battery according to another embodiment, preferably, the first cushion member is formed of a rubber-like elastic body, and the second cushion member is formed of a rubber-like elastic body containing a filler.

(12) In the battery according to another embodiment, preferably, a plurality of cushion members are provided on the heat conductive sheet, and one or more battery cells in the housing are placed.

According to the present invention, it is possible to provide a heat radiating structure that is lightweight and capable of suppressing damage to parts arranged in the vicinity, and a battery including the heat radiating structure.

FIG. 1A shows a vertical sectional view of a heat radiating structure according to the present embodiment and a battery including the heat radiating structure. FIG. 1B shows a vertical sectional view of a heat radiating structure according to the present embodiment when the heat radiating structure is compressed by a battery cell, and a battery including the heat radiating structure. FIG. 2A shows a perspective view of the heat radiating structure according to the present embodiment. FIG. 2B shows a vertical sectional view of a cushion member of the heat dissipation structure according to the present embodiment. FIG. 3 shows a perspective view of a state in which the heat radiating structure is arranged directly under the battery cell. FIG. 4 shows a modified example of the heat radiating structure of the present invention.

1 ... Heat dissipation structure, 2 ... Heat conduction sheet, 3 ... Cushion member, 10 ... Battery cell (an example of heat source), 20 ... Battery, 21 ... Housing, 26. ... Cooling member, 31 ... Through path (example of recess), 32 ... 1st cushion member, 33 ... 2nd cushion member, 40 ... Heat source.

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.

FIG. 1A shows a vertical sectional view of a heat radiating structure according to the present embodiment and a battery including the heat radiating structure. FIG. 1B shows a vertical sectional view of a heat radiating structure according to the present embodiment when the heat radiating structure is compressed by a battery cell, and a battery including the heat radiating structure. FIG. 2A shows a perspective view of the heat radiating structure according to the present embodiment. FIG. 2B shows a vertical cross-sectional view of the cushion member of the heat dissipation structure.

As shown in FIGS. 1A and 1B, the battery 20 has a structure in which a plurality of battery cells 10 are provided in a housing 21 in which the cooling member 26 is brought into contact with the battery 20. The heat radiating structure 1 includes an end portion (lower end portion) on the side close to the cooling member (for example, cooling water) 26 of the battery cell 10 which is an example of a heat source, and a part (bottom portion) of the housing 21 on the side close to the cooling member 26. It is prepared between 22).

The heat dissipation structure 1 is a structure that conducts heat from the battery cell 10 to the cooling member 26 to enable heat dissipation from the battery cell 10. The heat radiating structure 1 contains at least one of metal, carbon or ceramics, and is between the heat conductive sheet 2 which can be arranged between the battery cell 10 and the cooling member 26 and the heat conductive sheet 2 between the battery cell 10 and the heat conductive sheet 2. The cushion member 3 is provided and is more easily deformed according to the surface shape of the heat source than the heat conductive sheet 2. The cushion member 3 contains a filler having a higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body. Further, the cushion member 3 is preferably a tubular cushion member having a through-passage 31 penetrating in the length direction thereof. The cushion member 3 preferably includes a first cushion member 32 and a second cushion member 33 that covers the outer surface of the first cushion member 32. The second cushion member 33 has higher thermal conductivity than the first cushion member 32.

The heat conductive sheet 2 has a function of conducting heat from the battery cell 10 to the cooling member 26. The batteries 20 of FIGS. 1A and 1B include a plurality of battery cells 10 as heat sources in a housing 21 that contacts the cooling member 26. A plurality of cushion members 3 are provided on the heat conductive sheet 2, and a plurality of battery cells 10 are placed therein. In the present application, the "cross section" or "vertical cross section" means a cross section in the inner 24 of the housing 21 of the battery 20 in the direction of vertically cutting from the upper opening surface to the bottom portion 22.

Next, the schematic configuration of the battery 20 and the constituent members of the heat dissipation structure 1 will be described in more detail.

(1) Outline of Battery Configuration In the present embodiment, the battery 20 is, for example, a battery for an electric vehicle and includes a large number of battery cells 10. The battery 20 includes a bottomed housing 21 that opens to one side. The housing 21 is preferably made of aluminum or an aluminum-based alloy. The battery cell 10 is arranged inside 24 of the housing 21. Electrodes 11 and 12 (see FIG. 3) are provided so as to project above the battery cell 10. The plurality of battery cells 10 are preferably brought into close contact with each other in the housing 21 by applying a force in the direction of compression from both sides thereof using screws or the like (not shown). The bottom 22 of the housing 21 is provided with one or more water cooling pipes 25 for flowing cooling water, which is an example of the cooling member 26. The battery cell 10 is arranged in the housing 21 so as to sandwich the heat radiating structure 1 with the bottom portion 22. In the battery 20 having such a structure, the battery cell 10 transfers heat to the housing 21 through the heat radiating structure 1 and is effectively removed by water cooling. The cooling member 26 is not limited to cooling water, but is interpreted to include an organic solvent such as liquid nitrogen and ethanol. The cooling member 26 is not limited to a liquid under the conditions used for cooling, and may be a gas or a solid.

(2) Heat Conductive Sheet The heat conductive sheet 2 is preferably a sheet containing carbon, and more preferably a sheet containing a carbon filler and a resin. The term "carbon" as used in the present application includes any structure composed of carbon (element symbol: C) such as graphite, carbon black having lower crystallinity than graphite, expanded graphite, diamond, and diamond-like carbon having a structure similar to diamond. Is interpreted in a broad sense. In this embodiment, the heat conductive sheet 2 can be a thin sheet obtained by curing a material obtained by blending and dispersing graphite fibers and carbon particles in a resin. Expanded graphite filler may be used instead of graphite fibers and carbon particles. In expanded graphite, a graphite intercalation compound in which a substance is inserted into scaly graphite is rapidly heated by using a chemical reaction, and the substance between the layers is gasified. Graphite in an expanded state. Further, the heat conductive sheet 2 may be a carbon fiber knitted in a mesh shape, and may be blended or knitted. Fillers made of graphite fibers, carbon particles, carbon fibers or expanded graphite are all included in the concept of carbon fillers.

When the heat conductive sheet 2 contains a resin, the resin may exceed 50% by mass or 50% by mass or less with respect to the total mass of the heat conductive sheet 2. That is, it does not matter whether or not the heat conductive sheet 2 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 10 which is an example of a heat source is preferable, and for example, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), and the like. Polyamideimide (PAI) and the like can be preferably mentioned. The resin is dispersed in the gaps between the carbon fillers, for example, in the form of particles in the state before molding of the heat conductive sheet 2. In addition to the carbon filler and the resin, the heat conductive sheet 2 may be dispersed with AlN or diamond as a filler for further enhancing the heat conduction. Further, instead of the resin, an elastomer that is more flexible than the resin may be used.

The heat conductive sheet 2 can also be a sheet containing metals and / or ceramics in place of or with carbon as described above. As the metal, those having relatively high thermal conductivity such as aluminum, copper, and alloys containing at least one of them can be selected. Further, as the ceramics, ceramics having relatively high thermal conductivity such as AlN, cBN, and hBN can be selected.

It does not matter whether the heat conductive sheet 2 is excellent in conductivity or not. The thermal conductivity of the heat conductive sheet 2 is preferably 10 W / mK or more. In this embodiment, the heat conductive sheet 2 is a strip-shaped plate of aluminum, aluminum alloy, copper or stainless steel, and is made of a material having excellent heat conductivity and conductivity. The heat conductive sheet 2 is preferably a sheet having excellent curvature (or flexibility), and the thickness thereof is not limited, but is preferably 0.05 to 5 mm, more preferably 0.065 to 0.5 mm. However, since the thermal conductivity of the heat conductive sheet 2 decreases as the thickness increases, it is necessary to determine the thickness by comprehensively considering the strength, flexibility and heat conductivity of the sheet. preferable.

(3) Cushion member The important functions of the cushion member 3 are deformability and resilience. Deformability is a characteristic necessary to follow the shape of the battery cell 10, 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 10, 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 3 and the resilience for maintaining the following force.

In the present embodiment, the cushion member 3 is a tubular cushion member provided with a gangway 31 as shown in FIG. 2B. The cushion member 3 improves the contact between the heat conductive sheet 2 and the lower end portions even when the lower end portions of the plurality of battery cells 10 are not flat. Further, the gangway 31 has a function of contributing to facilitating the deformation of the cushion member 3 and enhancing the contact between the heat conductive sheet 2 and the lower end portion of the battery cell 10. The cushion member 3 has a function of exerting cushioning property between the battery cell 10 and the bottom portion 22, and also has a function of a protective member for preventing the heat conductive sheet 2 from being damaged by a load applied to the heat conductive sheet 2. Have. In this embodiment, the cushion member 3 is a member having a lower thermal conductivity than the heat conductive sheet 2.

The cushion member 3 is a double-structured tubular member formed in the order of the first cushion member 32 and the second cushion member 33 from the through-passage 31 toward the outer side in the radial direction. The first cushion member 32 is preferably a thermoplastic elastomer such as silicone rubber, urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber, nitrile rubber (NBR) or styrene butadiene rubber (SBR); It is configured to contain thermoplastic elastomers such as urethane-based, ester-based, styrene-based, olefin-based, butadiene-based, and fluorine-based, or composites thereof. The first cushion member 32 is preferably made of a material having high heat resistance that can maintain its shape without being melted or decomposed by the heat transmitted through the heat conductive sheet 2. In the present embodiment, the first cushion member 32 is more preferably made of a urethane-based elastomer impregnated with silicone or silicone rubber. The second cushion member 33 is made of a material having higher thermal conductivity than the first cushion member 32. Specifically, the second cushion member 33 is configured by dispersing fillers typified by AlN, cBN, hBN, diamond particles, etc. in the rubber as described above in order to enhance its thermal conductivity. NS. In the present embodiment, the second cushion member 33 needs to quickly transfer the heat from the battery cell 10 to the heat conductive sheet 2, and more preferably, the filler is dispersed in a silicone rubber having excellent heat conductivity. It is composed. The thickness of the second cushion member 33 is not limited, but is preferably 0.3 to 5 mm, more preferably 0.3 to 1 mm. However, the thermal conductivity of the second cushion member 33 decreases as the thickness increases. Further, the flexibility of the rubber of the second cushion member 33 containing the filler is lower than that of the first cushion member 32 containing no filler. Therefore, it is preferable to determine the thickness of the battery cell 10 by comprehensively considering the unevenness or rubber hardness and thermal conductivity of the surface of the battery cell 10.

Since the cushion member 3 of the present embodiment is configured by dispersing the filler only in the second cushion member 33, as compared with the case where the filler is dispersed in both the first cushion member 32 and the second cushion member 33. The manufacturing cost can be suppressed, and the decrease in the flexibility of the rubber can be suppressed. The cushion member 3 may contain air bubbles or may not contain air bubbles. Further, the "cushion member" means a member that is highly flexible and can be 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".

FIG. 3 shows a perspective view of a state in which the heat radiating structure is arranged directly under the battery cell.

The battery cell 10 is provided with electrodes 11 and 12 on the side opposite to the side in contact with the heat radiating structure 1 (upper in FIGS. 1 and 3). In the heat radiating structure 1, a plurality of cushion members 3 are arranged on the heat conductive sheet 2 in parallel with the longitudinal direction of the battery cell 10 (the depth direction in FIG. 3). Here, 10 cushion members 3 are arranged on the heat conductive sheet 2, but the number of cushion members 3 arranged on the heat conductive sheet 2 is not limited to 10. Further, the number of battery cells 10 arranged in the heat radiating structure 1 is also not particularly limited.

As shown in FIGS. 1A and 1B, the heat radiating structure 1 in the housing 21 comes into contact with the lower end portion of the battery cell 10 located on the opposite side of the electrodes 11 and 12, and the lower end portion and the bottom portion of the housing 21 are in contact with each other. It is in a state of being compressed in the vertical direction with 22. In this state, as shown in FIG. 1B, the cushion member 3 is deformed, so that the lower end portion of the battery cell 10 and the heat conductive sheet 2 are in good contact with each other. The heat generated when the battery 20 is charged or discharged is transmitted from the lower end of the battery cell 10 to the cushion member 3, the heat conductive sheet 2, the bottom 22 of the housing 21, and the cooling member 26. In this way, effective heat removal of the battery cell 10 is realized. The heat radiating structure 1 may be arranged in the housing 21 with the cushion member 3 facing the battery cell 10 side and the heat conductive sheet 2 facing the cooling member 26 side (may be referred to as the bottom 22 side). good.

(Action / effect of the embodiment)
As described above, the heat radiating structure 1 is located between the battery 20 and the cooling member 26, and conducts heat from the battery 20 to the cooling member 26 to enable heat dissipation from the battery 20. A heat conductive sheet 2 containing at least one of carbon or ceramics and can be arranged between the battery 20 and the cooling member 26, and provided between the battery 20 and the heat conductive sheet 2 as compared with the heat conductive sheet 2. A cushion member 3 that is easily deformed according to the surface shape of the battery 20 is provided. Further, the cushion member 3 contains a filler having a higher thermal conductivity than the rubber-like elastic body in the rubber-like elastic body.

Therefore, it is lighter than the conventional metal heat-dissipating fins and the like, and damage to parts arranged around the heat-dissipating structure 1 can be suppressed. Also, due to the cushion member 3, it becomes possible to adapt to various forms of the battery cell 20.

Further, the cushion member 3 is a tubular cushion member having a through-passage 31 penetrating in the length direction thereof. Therefore, the deformability of the cushion member 3 is enhanced, and even when the lower ends of the plurality of battery cells 10 are not flat, the heat conductive sheet 2 and the lower ends can be in good contact with each other. Further, the heat radiating structure 1 becomes lighter due to the through-passage 31.

Further, the cushion member 3 includes a first cushion member 32 and a second cushion member 33 that covers the outer surface of the first cushion member 32, and the second cushion member 33 is more heat than the first cushion member 31. High conductivity. Specifically, the first cushion member 32 is formed of a rubber-like elastic body, and the second cushion member is formed of a rubber-like elastic body containing a filler having a higher thermal conductivity than the rubber-like elastic body. Therefore, the heat generated when the battery 20 is charged or discharged can further enhance the thermal conductivity from the battery cell 10 to the heat conductive sheet 2. Further, by providing the first cushion member 32 containing no filler inside the second cushion member 33, it is possible to suppress a decrease in the deformability of the cushion member.

Further, since a plurality of cushion members 3 are provided on the heat conductive sheet 2, the surface area of the cushion members on the heat conductive sheet 2 becomes large, and effective heat removal of the battery cell 10 is realized.

(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.

For example, the heat source includes not only the battery cell 10 but also all objects that generate heat, such as a circuit board and an electronic device main body. For example, the heat source may be an electronic component such as a capacitor and an IC chip. Similarly, the cooling member 26 may be not only cooling water but also an organic solvent, liquid nitrogen, or a cooling gas. Further, the heat radiating structure 1 and the like may be arranged in a structure other than the battery 20 and the like, for example, an electronic device, a home appliance, a power generation device and the like.

Further, the heat radiating structure 1 of the present invention can be used not only for the battery cell 10 but also for a heat source having a wide variety of shapes. FIG. 4 shows a vertical cross-sectional view when the heat radiating structure of the present invention is adopted as a cylindrical heat source. As shown in FIG. 4, when the heat radiating structure 1 of the present invention is adopted for the cylindrical heat source 40, the surface of the heat conductive sheet 2 opposite to the surface on which the cushion member 3 is arranged is used as the heat source 40. Effective heat removal of the heat source 40 can be realized by pressing the surface on which the wrapping and cushion member 3 is arranged against the cooling member.

Further, in the above-described embodiment, a plurality of cushion members 3 are arranged on the heat conductive sheet 2, but one cushion member 3 may be arranged on the heat conductive sheet 2.

Further, in the above-described embodiment, the plurality of cushion members 3 are arranged parallel to each other on the heat conductive sheet 2, but may be arranged non-parallel on the heat conductive sheet 2.

Further, although the cushion member 3 in the above-described embodiment is a tubular cushion member having a gangway 31, it does not have to have a gangway 31. Further, the vertical cross-sectional shape of the cushion member 3 is not limited to a circle, and may be, for example, a polygon.

Further, the cushion member 3 may be a rod-shaped cushion member having a recess recessed in the length direction thereof instead of the gangway 31. The larger the depression in the length direction of the cushion member 3, the higher the deformability of the cushion member 3. Therefore, it is more preferable that the cushion member 3 has a recess that closes one opening portion of the gangway 31.

Further, although the cushion member 3 in the above-described embodiment has a double structure including the first cushion member 32 and the second cushion member 33, it may be formed only by the second cushion member 33. Further, the cushion member 3 may have a multiple structure having a triple structure or more. In such a case, it is preferable that the cushion member 3 adopts a member having higher thermal conductivity toward the outer side in the radial direction.

Further, the first cushion member 32 in the above-described embodiment was a rubber-like elastic body containing no filler such as silicone rubber, but similarly to the second cushion member 33, AlN, cBN, hBN, etc. were contained in the rubber. It may be configured by dispersing a filler typified by diamond particles or the like. In such a case, it is preferable that the amount of the filler contained in the first cushion member 32 is smaller than the amount of the filler contained in the second cushion member 33.

Further, in the above-described embodiment, the first cushion member 32 and the second cushion member 33 have different thermal conductivity depending on the content of the filler, but the type of the filler contained or the cushion member 3 The difference in thermal conductivity may be caused depending on the material of. For example, the filler contained in the second cushion member 33 may be a filler having higher thermal conductivity than the filler contained in the first cushion member 32. Further, the cushion member 3 may be formed so that the second cushion member 33 is made of a material having higher thermal conductivity than the first cushion member 32. Further, a highly flexible rubber sheet may be interposed on the surface of the cushion member 3 and / or the surface of the heat conductive sheet 2 that comes into contact with the heat source or the cooling member 26. However, in that case, it is preferable to reduce the thickness of the rubber sheet because the thermal conductivity of the heat radiating structure 1 can be maintained high.

The heat dissipation structure according to the present invention can be used not only for automobile batteries but also for various electronic devices such as automobiles, industrial robots, power generation devices, PCs, and household electric appliances. Further, the battery according to the present invention can be used not only as a battery for automobiles but also as a rechargeable battery for home use and a battery for electronic devices such as PCs.

Claims (12)

A heat dissipation structure that is located between a heat source and a cooling member and that conducts heat from the heat source to the cooling member to enable heat dissipation from the heat source.
A heat conductive sheet containing at least one of metal, carbon or ceramic and which can be arranged between the heat source and the cooling member.
A cushion member provided between the heat source and the heat conductive sheet and easily deformed according to the surface shape of the heat source as compared with the heat conductive sheet.
With
The cushion member is a heat-dissipating structure characterized in that the rubber-like elastic body contains a filler having a higher thermal conductivity than the rubber-like elastic body. The heat radiating structure according to claim 1, wherein the cushion member is a rod-shaped cushion member having a recess recessed in the length direction thereof. The recess is a gangway that penetrates the cushion member in the length direction thereof.
The heat radiating structure according to claim 2, wherein the cushion member is a tubular cushion member having the gangway. The cushion member is
With the first cushion member
A second cushion member that covers the outer surface of the first cushion member,
With
The heat radiating structure according to any one of claims 1 to 3, wherein the second cushion member has higher thermal conductivity than the first cushion member. The first cushion member is formed of the rubber-like elastic body, and is formed of the rubber-like elastic body.
The heat radiating structure according to claim 4, wherein the second cushion member is formed of a rubber-like elastic body containing a filler. The heat radiating structure according to any one of claims 1 to 5, wherein a plurality of the cushion members are provided on the heat conductive sheet. A battery having one or more battery cells as heat sources in a housing that contacts the cooling member.
A heat radiating structure is provided between the heat source and the cooling member, which conducts heat from the heat source to the cooling member and enables heat dissipation from the heat source.
The heat dissipation structure is
A heat conductive sheet containing at least one of metal, carbon or ceramic and which can be arranged between the heat source and the cooling member.
A cushion member provided between the heat source and the heat conductive sheet and easily deformed according to the surface shape of the heat source as compared with the heat conductive sheet.
With
The cushion member is a battery characterized in that the rubber-like elastic body contains a filler having a higher thermal conductivity than the rubber-like elastic body. The battery according to claim 7, wherein the cushion member is a rod-shaped cushion member having a recess recessed in the length direction thereof. The recess is a gangway that penetrates the cushion member in the length direction thereof.
The battery according to claim 8, wherein the cushion member is a tubular cushion member having the gangway. The cushion member is
With the first cushion member
A second cushion member that covers the outer surface of the first cushion member,
With
The battery according to any one of claims 7 to 9, wherein the second cushion member has higher thermal conductivity than the first cushion member. The first cushion member is formed of the rubber-like elastic body.
The battery according to claim 10, wherein the second cushion member is formed of a rubber-like elastic body containing a filler. The battery according to any one of claims 7 to 11, wherein a plurality of the cushion members are provided on the heat conductive sheet and one or more of the battery cells in the housing are placed.

Images