NL2019888B1 - Heat dissipating structure, and battery provided with the same - Google Patents

Heat dissipating structure, and battery provided with the same Download PDF

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Publication number
NL2019888B1
NL2019888B1 NL2019888A NL2019888A NL2019888B1 NL 2019888 B1 NL2019888 B1 NL 2019888B1 NL 2019888 A NL2019888 A NL 2019888A NL 2019888 A NL2019888 A NL 2019888A NL 2019888 B1 NL2019888 B1 NL 2019888B1
Authority
NL
Netherlands
Prior art keywords
heat
sheet
battery
dissipating structure
conductive sheet
Prior art date
Application number
NL2019888A
Other languages
Dutch (nl)
Inventor
Ando Hitoshi
Nakafuji Noboru
Original Assignee
Shinetsu Polymer Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shinetsu Polymer Co filed Critical Shinetsu Polymer Co
Priority to NL2019888A priority Critical patent/NL2019888B1/en
Priority to PCT/JP2018/038596 priority patent/WO2019082751A1/en
Priority to CN201890001034.4U priority patent/CN212162033U/en
Priority to DE212018000344.0U priority patent/DE212018000344U1/en
Priority to CN201890001033.XU priority patent/CN212085181U/en
Priority to PCT/JP2018/038597 priority patent/WO2019082752A1/en
Priority to JP2020508638A priority patent/JP7116781B2/en
Priority to DE212018000345.9U priority patent/DE212018000345U1/en
Application granted granted Critical
Publication of NL2019888B1 publication Critical patent/NL2019888B1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367—Cooling facilitated by shape of device
    • H01L23/3672—Foil-like cooling fins or heat sinks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • H01M10/6555—Rods or plates arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
    • H01M10/6571—Resistive heaters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/36—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heating conductor embedded in insulating material
    • H05B3/38—Powder conductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
    • H05K7/20445—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff
    • H05K7/20454—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff with a conformable or flexible structure compensating for irregularities, e.g. cushion bags, thermal paste
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F2013/005—Thermal joints
    • F28F2013/006—Heat conductive materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The present invention relates to a heat dissipating structure 25 and a battery 1 provided With the heat dissipating structure 25, the heat dissipating structure 25 being provided between a heat source 20 and a cooling member 15 for transferring heat from the heat source 20 to the cooling member 15 and including a heat conductive sheet 30 containing at least one of metal, carbon, and ceramic, and capable of being disposed between the heat source 20 and the cooling member 15, and a rubbery elastic body 31 capable of being disposed between the heat source 20 and the cooling member 15 While being in contact With the heat conductive sheet 30, Where the heat conductive sheet 30 includes a protruding sheet portion 35 capable of being disposed extending in a gap between a plurality of the heat sources 20.

Description

DESCRIPTION
TITLE OF INVENTION: HEAT DISSIPATING STRUCTURE, AND BATTERY PROVIDED WITH THE SAME
TECHNICAL FIELD
[0001]
The present invention relates to a heat dissipating structure, and a battery provided with the same.
BACKGROUND ART
[0002]
Control systems of vehicles, aircraft, vessels, or household or industrial electronic appliances are becoming more and more accurate and complex, resulting in increased integration density of small electronic components on a circuit board. It is therefore desired to develop solutions to faults and reduced life of electronic components caused by heat generated around the circuit board.
[0003]
Conventionally, to realize rapid heat dissipation from a circuit board, one or a combination of a plurality of the following solutions are adopted: fabrication of the circuit board with a material having a superior heal dissipation property, attachment of a heat sink, and driving of a heat-dissipating rotating appliance. Among the solutions, the method of manufacturing the circuit board with a material having a superior heat dissipation property, such as diamond, aluminum nitride (AIN), or cBN, increases the cost of the circuit board. Furthermore, disposing a heat-dissipating rotating appliance involves problems such as occurrence of faults, a necessity of maintenance for fault prevention, and a difficulty in securing an installation space. On the other hand, a heat dissipating fin is a simple member whose heat dissipation property can be increased by increasing a surface area by forming a large number of columnar or flat plate-shaped protruding portions made of a highly heat conductive metal (such as aluminum), and the heat dissipating fin is universally used as a heal dissipating component (see Patent Literature 1).
[0004]
Currently, there is an active global movement to gradually switch from conventional gasoline- and diesel-powered vehicles to electric vehicles to reduce the burden on the environment. Particularly, European countries including France, the Kingdom of Netherlands, and Germany, and the People's Republic of China announced that they would completely switch from gasoline- and diesel-powered vehicles to electric vehicles by 2040. To enable widespread adoption of electric vehicles, tasks such as development of a high-performance battery, installation of a large number of plug-in stations, and the like have to be accomplished. Particularly, a technological development to improve the charge-discharge function of a lithium-based vehicle battery poses a great challenge. This vehicle battery is known not to be able to sufficiently exercise the chargedischarge function in a high temperature of 60 degrees Celsius or higher. Accordingly, as in the case of the circuit board described, importance is placed on increasing the heat dissipation property of the battery.
[0005]
To realize rapid heat dissipation from a battery, a structure is adopted where a water-cooled pipe is disposed in a housing made of a highly heat conductive metal such as aluminum, a large number of battery cells are disposed in the housing, and an adhesive rubber sheet is interposed between the battery cells and a bottom surface of the housing. A description will be given below with reference to the drawing.
[0006]
Fig. 12 is a schematic cross-sectional view of a conventional battery. A battery 200 in Fig. 12 includes a large number of battery cells 201 on an inner bottom surface 203 of a housing 202 made of aluminum or aluminum-based alloy. A water-cooled pipe 205 where cooling water flows through is provided in a bottom portion 204 of the housing 202. The battery cells 201 are fixed inside the housing 202 with a rubber sheet (such as a room temperature vulcanizing silicone rubber sheet) 206 between the battery cells 201 and the bottom portion 204. With the battery 200 having such a structure, heat of the battery cells 201 is transferred to the housing 202 through the rubber sheet 206, and is effectively removed by water cooling.
CITATION LIST
PATENT LITERATURE
[0007] [PATENT LITERATURE 1] Japanese Patent Laid-Open No. 2008-243999
SUMMARY OF INVENTION
TECHNICAL PROBLEM
[0008]
However, a heat dissipation structure of the conventional battery 200 as shown in Fig. 12 includes following problems. The heat conductivity of the rubber sheet 206 is low compared to that of aluminum or graphite, and it is difficult to efficiently transfer heat from the battery cells 201 to the housing 202. A method of interposing a spacer of graphite or the like instead of the rubber sheet 206 is conceivable. However, because lower surfaces of the plurality of battery cells 201 are not flat but stepped, a gap is formed between the battery cells 201 and the spacer, and the heattransfer efficiency is reduced. The lower surfaces of the battery cells may take various forms, and realization of high heat-transfer efficiency not dependent on the shape of the battery cells is desired. Furthermore, a case of the battery cell is desired to be made of a lighter material, and thus, a heat dissipating structure compatible with a lighter battery cell is desired. The same thing can be said not only for the battery, but also for other heat sources such as a circuit board and an electronic appliance main body.
[0009]
The present invention has been made in view of the circumstances described above, and has its object to provide a heat dissipating structure having a high heat dissipation efficiency regardless of the shape or material of a heat source, and a battery provided with the same.
SOLUTION TO PROBLEM
[0010] (1) To achieve the object described above, a heat dissipating structure according to an embodiment is a heat dissipating structure provided between a heat source and a cooling member for transferring heat from the heat source to the cooling member, including a heat conductive sheet containing at least one of metal, carbon, and ceramic, and capable of being disposed between the heal source and the cooling member, and a rubbery elastic body capable of being disposed between the heat source and the cooling member while being in contact with the heat conductive sheet, where the heat conductive sheet includes a protruding sheet portion capable of being disposed extending in a gap between a plurality of the heat sources.
[0011] (2) With the heal dissipating structure according to another embodiment, preferably, the heat conductive sheet has, at a part disposed between the heat source and the cooling member, a first folded shape folded in a U shape or a V shape in cross section or a first bag shape annular in cross section, and the rubbery elastic body is disposed in an inner portion of the first folded shape or the first bag shape.
[0012] (3) With the heat dissipating structure according to another embodiment, preferably, the protruding sheet portion has a second folded shape folded in a U shape or a V shape in cross section or a second bag shape annular in cross section, and the rubbery elastic body is partially disposed in an inner portion of the second folded shape or the second bag shape.
[0013] (4) The heat dissipating structure according to another embodiment preferably further includes a rubber sheet for closely fixing the heat conductive sheet to at least one of the heat source and a surrounding of the cooling member.
[0014] (5) With the heat dissipating structure according to another embodiment, preferably, the rubber sheet is a silicone rubber sheet.
[0015] (6) With the heal dissipating structure according to another embodiment, preferably, the heat conductive sheet is a sheet containing carbon filler and resin.
[0016] (7) The heat dissipating structure according to another embodiment preferably further includes current-carrying electrodes capable of supplying power to heat the heat conductive sheet or the rubbery elastic body.
[0017] (8) Moreover, a battery according to an embodiment of the present invention is a battery including a plurality of battery cells as heal sources inside a housing in contact with a cooling member, and including a heat dissipating structure for transferring heat from the battery cells to the cooling member, the heat dissipating structure being provided between end portions of the battery cells near the cooling member and a part of the housing near the cooling member, where the heat dissipating structure includes a heat conductive sheet containing at least one of metal, carbon, and ceramic, and capable of being disposed between the battery cells and the cooling member, and a rubbery elastic body capable of being disposed between the battery cells and the cooling member while being in contact with the heat conductive sheet, and the heat conductive sheet includes a protruding sheet portion capable of being disposed extending in a gap between the plurality of battery cells.
[0018] (9) With the battery according to another embodiment, preferably, the heat conductive sheet has, at a part disposed between the battery cells and the cooling member, a first folded shape folded in a U shape or a V shape in cross section or a first bag shape annular in cross section, and the rubbery elastic body is disposed in an inner portion of the first folded shape or the first bag shape.
[0019] (10) With the battery according to another embodiment, preferably, the protruding sheet portion has a second folded shape folded in a U shape or a V shape in cross section or a second bag shape annular in cross section, and the rubbery elastic body is partially disposed in an inner portion of the second folded shape or the second bag shape, [0020] (11) The battery according to another embodiment preferably further includes a rubber sheet for closely fixing the heat conductive sheet to at least the battery cells or a surrounding of the cooling member.
[0021] (12) The battery according to another embodiment preferably further includes current-carrying electrodes capable of supplying power to heat the heat conductive sheet or the rubbery elastic body.
[0022] (13) Moreover, to achieve the object described above, a heat dissipating structure according to an embodiment is a heat dissipating structure provided between a heat source and a cooling member for transferring heat from the heat source to the cooling member, including a heat conductive sheet containing at least one of metal, carbon, and ceramic, and capable of being disposed between the heat source and the cooling member, and a rubbery elastic body capable of being disposed between the heat source and the cooling member while being in contact with the heat conductive sheet, where the heat conductive sheet includes a contact part wrapped around half or more of a circumference of the heat source.
[0023] (14) With the heat dissipating structure according to another embodiment, preferably, the heat conductive sheet covers a plurality of the heat sources in an S shape or in continuous S shapes in cross section.
[0024] (15) With the heat dissipating structure according to another embodiment, preferably, the heat conductive sheet covers one heat source and then covers another heat source different from the one heat source by being folded back by reversal of a covering direction.
[0025] (16) With the heat dissipating structure according to another embodiment, preferably, the rubbery elastic body is provided on a part of the heat conductive sheet at a position closer to the cooling member than a part of the heat conductive sheet covering the heat source.
[0026] (17) With the heat dissipating structure according to another embodiment, preferably, the rubbery elastic body is at least partially surrounded by the heat conductive sheet at a part of the heat conductive sheet disposed between the heat source and the cooling member.
[0027] (18) Moreover, a battery according to an embodiment of the present invention is a battery including a plurality of battery cells as heat sources inside a housing in contact with a cooling member, and including a heat dissipating structure for transferring heat from the battery cells to the cooling member, the heat dissipating structure being provided between end portions of the battery cells near the cooling member and a part of the housing near the cooling member, where the heat dissipating structure includes a heat conductive sheet containing at least one of metal, carbon, and ceramic, and capable of being disposed between the battery cells and the cooling member, and a rubbery elastic body capable of being disposed between the battery cells and the cooling member while being in contact with the heat conductive sheet, and the heat conductive sheet includes a contact part wrapped around half or more of circumferences of the battery cells.
[0028] (19) With the battery according to another embodiment, preferably, the heat conductive sheet covers the plurality of battery cells in an S shape or in continuous S shapes in cross section. [0029] (20) With the battery according to another embodiment, preferably, the heat conductive sheet covers one battery cell and then covers another battery cell different from the one battery cell by being folded back by reversal of a covering direction.
[0030] (21) The battery according to another embodiment preferably further includes a rubber sheet for closely fixing the heat conductive sheet to at least the heat conductive sheet, the battery cells, or a surrounding of the cooling member, where the rubber sheet is interposed between one part of the heat conductive sheet and another part of the heat conductive sheet formed by covering one battery cell by the heat conductive sheet and then folding back the heat conductive sheet by reversal of a covering direction.
[0031] (22) With the battery according to another embodiment, preferably, the rubbery elastic body is provided on the heat conductive sheet at a position closer to the cooling member than a part of the heat conductive sheet covering the battery cells.
ADVANTAGEOUS EFFECT OF INVENTION
[0032]
According to the present invention, a heat dissipating structure having a high heat dissipation efficiency regardless of the shape or material of a heat source, and a battery provided with the same can be provided.
BRIEF DESCRIPTION OF DRAWINGS
[0033] [Fig. 1] Fig. I shows a vertical cross-sectional view of each of a heat dissipating structure according to a first embodiment, and a battery including the heat dissipating structure.
[Fig. 2] Fig. 2 shows an enlarged view (2A) and an enlarged view (2B), respectively, of a region Al and a region Bl in Fig. 1.
[Fig. 3] Fig. 3 shows a vertical cross-sectional view of each of a heat dissipating structure according to a second embodiment, and a battery including the heat dissipating structure.
[Fig. 4] Fig. 4 shows an enlarged view (4A) and an enlarged view (4B), respectively, of a region A2 and a region B2 in Fig. 3.
[Fig. 5] Fig. 5 shows a vertical cross-sectional view of each of a heat dissipating structure according to a third embodiment, and a battery including the heat dissipating structure.
[Fig. 6] Fig. 6 shows an enlarged view (6A) and an enlarged view (6B), respectively, of a region Cl and a region DI in Fig. 5.
[Fig. 7] Fig. 7 is a perspective view showing a state where battery cells, which are an example of a heat source, are covered by a heat dissipating structure according to a fourth embodiment.
[Fig. 8] Fig. 8 shows a vertical cross-sectional view of each of the heat dissipating structure in Fig. 7, and a battery including the heat dissipating structure.
[Fig. 9] Fig. 9 shows each of a vertical cross-sectional view (9A) of a heat dissipating structure according to a fifth embodiment and a battery including the heat dissipating structure, and a view (9B) schematically showing a cross-sectional shape of a heat conductive sheet in (9A).
[Fig. 10] Fig. 10 shows a vertical cross-sectional view of each of a heat dissipating structure according to a sixth embodiment, and a battery including the heat dissipating structure.
[Fig. 11] Fig. 11 shows an enlarged view (11A) and an enlarged view (1 IB), respectively, of a region Cl and a region DI in Fig. 10.
[Fig. 12] Fig. 12 is a schematic cross-sectional view of a conventional battery.
DESCRIPTION OF EMBODIMENTS
[0034]
Next, each embodiment of the present invention will be described with reference to the drawings. Additionally, each embodiment described below does not limit the invention defined by the claims, and also, not all the elements or combinations thereof described in each embodiment are essential to solutions of the present invention.
[0035] (First Embodiment)
Fig. 1 shows a vertical cross-sectional view of each of a heat dissipating structure according to a first embodiment, and a battery including the heat dissipating structure. Fig. 2 shows an enlarged view (2A) and an enlarged view (2B), respectively, of a region Al and a region B l in Fig. 1.
[0036] A heat dissipating structure 25 according to the first embodiment is a heat dissipating structure which is provided between battery cells 20, which are an example of a heat source in a battery 1, and a cooling member 15, and which transfers heat from the battery cells 20 to the cooling member 15. The heat dissipating structure 25 includes a heat conductive sheet 30 which is a sheet containing at least one of metal, carbon, and ceramic, and which can be disposed between the battery cells 20 and the cooling member 15, and a rubbery elastic body 31 which can be disposed between the battery cells 20 and the cooling member 15 while being in contact with the heat conductive sheet 30. The heat conductive sheet 30 includes a protruding sheet portion 35 which can be disposed extending in gaps between the battery cells 20. More specifically, as shown in Fig. 1, the battery 1 is a battery including a plurality of battery cells 20, as heat sources, in a housing 11 in contact with the cooling member 15. The heat dissipating structure 25 for transferring heat from the battery cells 20 to the cooling member 15 is provided between end portions of the battery cells 20 near the cooling member 15 and a part (bottom portion 12) of the housing 11 near the cooling member 15. The heat dissipating structure 25 includes the heat conductive sheet 30 which contains at least one of metal, carbon, and ceramic, and which can be disposed between the battery cells 20 and the cooling member 15, and the rubbery elastic body 31 which can be disposed between the battery cells 20 and the cooling member 15 while being in contact with the heat conductive sheet 30. The heat conductive sheet 30 includes the protruding sheet portion 35 which can be disposed extending in gaps between the battery cells 20.
[0037]
Furthermore, the heat conductive sheet 30 has a first folded shape which is folded in a U shape or a V shape in cross section at a part disposed between the battery cells 20 and the cooling member 15. The rubbery elastic body 31 is preferably disposed in an inner portion 32 of the first folded shape. Additionally, the first folded shape may be a first bag shape which is annular in cross section. In this case, the rubbery elastic body 31 is preferably disposed in an inner portion of the first bag shape. Moreover, in the present application, a "cross section" or a "vertical cross section" refers to a cross section along a direction of vertically cutting from an upper opening surface of an inner portion 14 of the housing 11 of the battery 1 to the bottom portion 12.
[0038] (1) Schematic Configuration of Battery
In the present embodiment, the battery 1 is a battery of an electric vehicle, for example, and includes a large number of battery cells 20. The battery 1 includes the bottomed housing 11 which is open on one side. The housing 11 is preferably made of aluminum or aluminum-based alloy. The battery cells 20 are disposed in the inner portion 14 of the housing 11. An electrode is provided protruding from the top of the battery cell 20. The plurality of battery cells 20 are preferably in close contact with each other by compression force from both sides applied by screws or the like in the housing 11 (not shown). One or a plurality of water-cooled pipes 13 where cooling water, which is an example of the cooling member 15, is to flow are provided in the bottom portion 12 of the housing 11. The battery cells 20 are disposed inside the housing 11 in a manner sandwiching the heat dissipating structure 25 with the bottom portion 12. With the battery 1 having such a structure, heat of the battery cells 20 is transferred to the housing 11 through the heal dissipating structure 25, and is effectively removed by water cooling. Additionally, the cooling member 15 is not limited to cooling water, and is interpreted to include liquid nitrogen, and organic solvents such as ethanol. To be used for cooling, the cooling member 15 does not have to be liquid, but may be gas or solid.
[0039] (2) Heat Conductive Sheet
In the present embodiment, the heat conductive sheet 30 includes one curved portion which is U-shaped in a vertical cross section, between the plurality of battery cells 20 and the bottom portion 12. The heat conductive sheet 30 may include a V-shaped bent portion instead of the U-shaped curved portion.
[0040]
The heat conductive sheet 30 is preferably a sheet containing carbon, and is more preferably a sheet containing carbon filler and resin. In the present application, "carbon" is broadly interpreted to include any structure made of carbon (symbol: C), such as graphite, carbon black having lower crystallinity than graphite, expanded graphite, diamond, or diamond-like carbon. In the present embodiment, the heat conductive sheet 30 is a thin sheet obtained by curing a material which is resin in which graphite fibers or carbon particles are blended and dispersed. Expanded graphite filler may be used instead of graphite fibers or carbon particles. Expanded graphite is graphite which is expanded in a stacking direction of layers due to the gap between layers of graphite being increased due to discharge of gas at the time of gasification of a substance between the layers caused by rapid heating of a graphite intercalation compound obtained by intercalating a substance in flake graphite using chemical reaction. Graphite fibers, carbon particles, and expanded graphite filler are all included in the concept of carbon filler. The heat conductive sheet 30 may contain, instead of carbon or together with carbon, metal and/or ceramic. As the metal, one having relatively high heat conductivity, such as aluminum, copper, or an alloy containing at least one of aluminum and copper, may be selected. Moreover, as the ceramic, one having relatively high heat conductivity, such AIN, cBN, or hBN, may be selected.
[0041]
Resin may exceed 50 mass% of the total mass of the heat conductive sheet 30, or the carbon filler may exceed 50 mass% of the total mass. That is, the main material of the heat conductive sheet 30 may be resin or the carbon filler so long as heat transfer is not greatly interfered with. As the resin, a thermoplastic resin may be suitably used, for example. A resin having a high melting point such that it does not melt at the time of transferring heat from the battery cells 20, as examples of a heat source, is desirable as the thermoplastic resin, and polyphenylenesulfide (PPS), polyether ether ketone (PEEK), or polyamide-imide (PAI) may be suitably cited, for example. Before molding of the heat conductive sheet 30, the resin is dispersed as particles in a gap of the carbon filler, for example. Other than the carbon filler and the resin, AIN or diamond may be dispersed as filler to further increase heat transfer. Furthermore, instead of resin, elastomer softer than resin may be used.
[0042]
The heat conductive sheet 30 is preferably superior in heat conductivity to the rubbery elastic body 31 described later, but does not have to be superior in electrical conductivity. The heat conductivity of the heat conductive sheet 30 is preferably 10 W/mK or higher. In the present embodiment, the heal conductive sheet 30 preferably contains graphite and carbon having lower crystallinity than graphite, and a network is formed which allows current to easily flow through the heat conductive sheet 30. However, the heat conductive sheet 30 does not have to be superior in electrical conductivity, and it is enough if it has heat conductivity. In such a case, the heat conductive sheet 30 may be a sheet containing AIN, diamond, diamond-like carbon (having lower electrical conductivity than graphite), or the like. The thickness of the heat conductive sheet 30 is not particularly limited as long as the sheet is capable of being curved (or of bending), but the thickness is preferably 0.3 mm to 5 mm, or more preferably, 0.3 mm to 1 mm. However, the heat conductivity of the heat conductive sheet 30 is reduced as the thickness is increased, and the thickness is preferably determined by comprehensively talcing into account the strength, the flexibility, and the heat conductivity of the sheet.
[0043]
The heat dissipating structure 25 includes the rubbery elastic body 31 in an inner space formed by folding the heat conductive sheet 30 in a U shape or a V shape in a region between end portions of the plurality of battery cells 20 near the cooling member 15 (or the bottom portion 12 of the housing 11) (in the present embodiment, the end portions are bottom portions of the battery cells 20) and an inner bottom surface of the bottom portion 12. The heat conductive sheet 30 further includes one or two or more protruding sheet portions 35 extending in gaps between the battery cells 20. Moreover, the heat conductive sheet 30 includes a terminal sheet portion 36 between an inner surface of a side wall of the housing 11 and a side surface of the battery cell 20. The terminal sheet portion 36 may be said to be one mode of the protruding sheet portion 35. The protruding sheet portion 35 and the terminal sheet portion 36 may be referred to as folds extending from a main body portion of the heat dissipating structure 25 (portion disposed in a space between the battery cells 20 and the bottom portion 12) into gaps between the battery cells 20.
[0044]
The protruding sheet portion 35 preferably has a second folded shape which is folded in a U shape (or a V shape) in cross section. The heat conductive sheet 30 extends from one end of the inner bottom surface of the bottom portion 12 to the other end, is folded in a U shape, and makes one second folding by extending upward in a gap between the battery cells 20 and then folding and extending downward in the gap, and such second folding is repeated by the number of gaps, and the terminal sheet portion 36 is finally formed. As a result, the heat dissipating structure 25 is formed to include, at the main body portion mentioned above, the protruding sheet portion 35 having the second folded shape, and the terminal sheet portion 36. hi this manner, the heat conductive sheet 30 is preferably formed by bending one sheet. However, the heat conductive sheet 30 may alternatively be formed from a plurality of sheets. Additionally, the protruding sheet portion 35 may have a second bag shape which is annular in cross section instead of the "second folded shape". In this case in this embodiment, air is preferably contained inside the second bag shape. Furthermore, the protruding sheet portion 35 may be extended in one direction like the terminal sheet portion 36, instead of having the second folded shape or the second bag shape. [0045]
As shown in Fig. 2 (2A), a gap M extending from the main body portion may be formed in the protruding sheet portion 35 by the second folding. Furthermore, in the present embodiment, a rubber sheet 40 is interposed between the protruding sheet portion 35 and the battery cell 20. The rubber sheet 40 contributes to increase heat transfer between the battery cell 20 and the protruding sheet portion 35 (a part of the heat conducti ve sheet 30). Details of the rubber sheet 40 will be given later.
[0046] (3) Rubbery Elastic Body
The rubbery elastic body 31 is an elastic body which is disposed in the inner portion 32 of the curved or bent heat conductive sheet 30, in the region between the end portions of the plurality of battery cells 20 near the cooling member 15 and the inner bottom surface of the bottom portion 12. The rubbery elastic body 31 has a cushioning function between the battery cells 20 and the bottom portion 12, and a function as a protective member which prevents the heat conductive sheet 30 from being damaged due to a load applied to the heat conductive sheet 30. The rubbery elastic body 31 is a member having lower heat conductivity than the heat conductive sheet 30.
[0047]
As shown in Fig. 2 (2B), the rubber sheet 40 is preferably interposed between the heat conductive sheet 30 and the bottom portion 12. The rubber sheet 40 has a function of allowing heat transferred from the battery cells 20 to the heat conductive sheet 30 to be easily transferred to the bottom portion 12. Heat generated by the battery cell 20 is transferred to the protruding sheet portion 35 through the rubber sheet 40 in contact with the protruding sheet portion 35, is transferred through the curved or bent heat conductive sheet 30, and is transferred to the bottom portion 12 and the cooling member 15 through the rubber 40 disposed on the inner bottom surface of the bottom portion 12.
[0048]
The rubbery elastic body 31 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), an urethane-based, ester-based, styrene-based, olefin-based, butadiene-based, or fluorine-based thermoplastic elastomer, or a composite thereof. The rubbery elastic body 31 is preferably made of a material which is high heat resistant enough to maintain its shape without melting or decomposing due to heat transferred through the heat conductive sheet 30. In the present embodiment, the rubbery elastic body 31 is more preferably made of an urethane-based elastomer impregnated with silicone, or a silicone rubber. To even slightly increase the heat conductivity, the rubbery elastic body 31 may include filler typified by AIN, cBN, hBN, or diamond particles dispersed in the rubber. [0049] (4) Rubber Sheet
In the present embodiment, the rubber sheet 40 is preferably a sheet which is disposed between the battery cell 20 and the heat conductive sheet 30, and between the bottom portion 12 and the heat conductive sheet 30, but is not an essential structure of the battery 1 or the heat dissipating structure 25. The rubber sheet 40 can be formed from various types of elastic bodies as in the case of the rubbery elastic body 31 described above, but the rubber sheet 40 is preferably a sheet containing silicone rubber superior in heal conductivity because heat from the battery cell 20 has to be rapidly transferred to the heat conductive sheet 30. In the case where the rubber sheet 40 is made mainly of silicone rubber, highly heat conductive filler of AIN, aluminum or the like is preferably dispersed in the silicone rubber. Furthermore, to increase tackiness, the rubber sheet 40 of silicone rubber may be silicone rubber combining silicone resin with bifunctional silicone raw rubber, for example. The silicone resin is suitably MQ resin, for example. The MQ resin is a resin according to which only a Q unit of a four-branch structure having oxygen atoms bonded to four bonds of Si is linked, and an M unit of a one-branch structure having an oxygen atom bonded to one bond of Si is added to stop reactivity at the end. Furthermore, as the silicone resin, one that bonds many hydroxyls is preferably used so that the tackiness of the silicone rubber may be increased.
[0050]
The rubber sheet 40 has a function of increasing the adhesion between the battery cell 20 and the heat conductive sheet 30, or the adhesion between the surrounding of the cooling member 15 (the bottom portion 12, side wall of the housing 11, etc.) and the heat conductive sheet 30. The hardness of the rubber sheet 40 is not particularly specified so long as the rubber sheet 40 is heat resistant and tacky, but in the case of a sheet made mainly of silicone rubber, the hardness according to Shore (Shore oo criteria) is 60 or less, or preferably, 40 or less, and more preferably, 10 or less. This is because the unevenness of a surface of the battery cell 20 can be more easily absorbed as the hardness of the rubber sheet 40 lowers. Furthermore, the thickness of the rubber sheet 40 is preferably 0.3 mm to 5 mm, or more preferably, 0.7 mm to 3 mm, and even more preferably, 1 mm to 2.5 mm. However, the thickness of the rubber sheet 40 is preferably determined according to the unevenness of the surface of the battery cell 20 or a condition such as the rubber hardness or the like.
[0051] (5) Preferred Battery Assembly Method (a) A resin material typified by PPS or the like, and graphite filler and/or carbon filler having lower crystallinity than graphite (preferably in the form of particles, fibers, etc.) are agitated in a liquid (such as water), and a felt-like sheet is fabricated in the maimer of papermaking. (b) Subsequently, the felt-like sheet is bent to have the same or similar cross-sectional shape as the heat conductive sheet 30 in Fig. 1. (c) The rubbery elastic body 31 is fixed at a part of the heat conductive sheet 30, and the heat dissipating structure 25 is completed. (d) Lastly, the heat dissipating structure 25 is embedded in the battery 1.
[0052] (Second Embodiment)
Fig. 3 shows a vertical cross-sectional view of each of a heat dissipating structure according to a second embodiment, and a battery including the heat dissipating structure. Fig. 4 shows an enlarged view (4A) and an enlarged view (4B), respectively, of a region A2 and a region B2 in Fig. 3.
[0053] A heat dissipating structure 25a and a battery la according to the second embodiment are the same as the heat dissipating structure 25 and the battery 1 according to the first embodiment except that, with the heat dissipating structure 25a and the battery la, the rubbery elastic body 31 is present in an inner portion of the protruding sheet portion 35, and the rubber sheet 40 is not interposed between the protruding sheet portion 35 and the side surface of the battery cell 20. In the following, aspects different from the first embodiment will be mainly described.
[0054] (1) Different Structure
As shown in Fig. 4 (4A), the protruding sheet portion 35 of the heat dissipating structure 25a has the second folded shape which is folded in a U shape or a V shape in cross section, or the second bag shape which is annular in cross section. A part of the rubbery elastic body 31 is disposed in an inner portion 37 of the second folded shape or the second bag shape of the protruding sheet portion 35. Even if the side surface of the battery cell 20 is slightly uneven or stepped, the adhesion between the heat conductive sheet 30 forming the protruding sheet portion 35 and the battery cell 20 can be increased by the rubbery elastic body 31 present in the inner portion 37 of the protruding sheet portion 35, and heat dissipation from the battery cell 20 may thereby be increased.
[0055]
Even if the rubber sheet 40 is not interposed between the protruding sheet portion 35 and the side surface of the battery cell 20, the rubbery elastic body 31 is present in the inner portion 37 of the protruding sheet portion 35, and the adhesion between the battery cell 20 and the protruding sheet portion 35 can thereby be increased. However, preferably, the rubber sheet 40 is provided between the protruding sheet portion 35 and the side surface of the battery cell 20. Provision of the rubber sheet 40 between the bottom portion 12 of the housing 11 and the heat conductive sheet 30 is the same as in the first embodiment, and a description of the structure in Fig. 4 (4B) is omitted.
[0056] (2) Preferred Battery Assembly Method
The heat dissipating structure 25a is manufactured by the same method as in the first embodiment, and is embedded in the battery 1 a.
[0057] (Third Embodiment)
Fig. 5 shows a vertical cross-sectional view of each of a heat dissipating structure according to a third embodiment, and a battery including the heat dissipating structure. Fig. 6 shows an enlarged view (6A) and an enlarged view (6B), respectively, of a region Cl and a region DI in Fig. 5.
[0058] A heat dissipating structure 25b and a battery 1 b according to the third embodiment are approximately the same as the heat dissipating structure 25 and the battery 1 according to the first embodiment except that, with the heat dissipating structure 25b and the battery lb, the heat conductive sheet 30 does not have a folded structure between the plurality of battery cells 20 and the bottom portion 12, the rubbery elastic body 31 is not surrounded by the heat conductive sheet 30, the heal conductive sheet 30 has two terminal sheet portions 36 in contact with inner side surfaces of the housing 11, and the heat conductive sheet 30 includes a current-carrying mechanism. In the following, aspects different from the first embodiment will be mainly described.
[0059] (1) Different Structure
The heat dissipating structure 25b includes the rubbery elastic body 31 in a region between the inner bottom surface of the bottom portion 12 of the housing 11 and the battery cells 20. The heat dissipating structure 25b includes, on the battery cell 20 side than the rubbery elastic body 31, the heat conductive sheet 30 having two terminal sheet portions 36 in contact with the battery cells 20 and inner circumferential surfaces of side walls of the housing 11 and having the protruding sheet portion 35 inserted in the gaps between the battery cells 20. Heat generated by the battery cell 20 is transferred to the heat conductive sheet 30 and the side wall of the housing 11, and is reduced by the cooling member 15 in the bottom portion 12. Furthermore, heat generated by the battery cell 20 is transferred through the heat conductive sheet 30 and the rubbery elastic body 31, and is reduced by the cooling member 15 in the bottom portion 12.
[0060]
The rubber sheet 40 is not interposed between the rubbery elastic body 31 and the bottom portion 12, because the rubbery elastic body 31 can be expected to easily adhere to the bottom portion 12. However, it is also possible to interpose the rubber sheet 40 between the rubbery elastic body 31 and the bottom portion 12.
[0061]
In the present embodiment, the heat conductive sheet 30 has electrical conductivity, and generates heat which is due to resistance during current conduction. A positive lead wire 50 and a negative lead wire 51 are connected to parts, or in this example, the two terminal sheet portions 36, of the heat conductive sheet 30. When a voltage is applied between the lead wires 50, 51, a current flows through the heat conductive sheet 30 and heat is generated.
[0062]
As shown in Fig. 6 (6A), the lead wire 50 is connected to a current-carrying electrode 60. The current-carrying electrode 60 is fixed to one of the terminal sheet portions 36. As shown in Fig. 6 (6B), the lead wire 51 is connected to a current-carrying electrode 61 in the same manner. The current-carrying electrode 61 is fixed to the other of the terminal sheet portions 36. In the present embodiment, the current-carrying electrode 60, 61 is a thin film that is formed by applying a paste containing metal filler on a surface of the heat conductive sheet 30. The paste containing metal filler is suitably a paste containing silver filler (i.e. silver paste), for example. In such a case, the thin film is a silver thin film. However, the current-carrying electrode 60, 61 may alternatively be made by applying a paste containing a metal material, other than silver, having relatively high electrical conductivity. Furthermore, the method for forming the current-carrying electrode 60, 61 is not particularly limited, and brushing or printing may be used, for example. In the present embodiment, the current-carrying electrode 60, 61 is formed on a surface of the heat conductive sheet 30. Alternatively, the current-carrying electrode 60, 61 may be formed on a region recessed inward from the surface of the heat conductive sheet 30, or may be embedded inside the heat conductive sheet 30. Furthermore, the rubber sheet 40 may be interposed between the terminal sheet portion 36 and the side wall of the housing 11 or between a side surface of the battery cell 20 and the terminal sheet portion 36, and the current-carrying electrode 60, 61 may be formed on the surface or inside the rubber sheet 40. Moreover, the current-carrying electrodes 60, 61 may be formed at near tops of two protruding sheet portions 35 which are separate from each other. The current-carrying electrode 60, 61 may be connected to another resistor instead of being connected to the heat conductive sheet 30, and may heat the rubbery elastic body 31 which is in contact with such other resistor instead of heating the heat conductive sheet 30.
[0063] (2) Preferred Battery Assembly Method
Steps the same as the assembly steps (a) to (d) in the first embodiment are performed, and after the steps or after (a), the current-carrying electrodes 60, 61 and the lead wires 50, 51 are fixed to the heat conductive sheet 30.
[0064]
With the heat dissipating structure 25, 25a, 25b (hereinafter referred to as "heat dissipating structure 25 or the like") according to each embodiment described above, heat from the battery cell 20 can be transferred to the bottom portion 12 of the battery 1, la, lb (hereinafter referred to as "battery 1 or the like") and the cooling member 15 through the protruding sheet portion 35 and the heat conductive sheet 30, regardless of the shape of the end portion of the battery cell 20 near the cooling member 15 and even if the battery cell 20 is light and cannot be expected to adhere to the heat dissipating structure by its own weight.
[0065]
Furthermore, because the rubbery elastic body 31 surrounded by the heat conductive sheet 30 at a part between the battery cells 20 and the cooling member 15 is flexible, the adhesion between the bottom portions of the battery cells 20 and the heat conductive sheet 30 and the adhesion between the side surfaces of the battery cells 20 and the protruding sheet portion 35 can be increased even in a case where the positions of the bottom portions of the plurality of battery cells 20 are not horizontal, and heat dissipation property can be expected to be further increased. [0066]
Furthermore, the adhesion between the protruding sheet portion 35 and the side surface of the battery cell 20 can be increased regardless of the unevenness of the side surface of the battery cell 20, and heat dissipation property can be expected to be further increased.
[0067]
Furthermore, the rubber sheet 40 contributes to increase heat dissipation from the battery cell 20 to the heat conductive sheet 30, or from the heat conductive sheet 30 to the bottom portion 12. Particularly, if the rubber sheet 40 is a sheet of silicone rubber, heat deterioration can be suppressed, and long lasting adhesion can be realized. Moreover, using the rubber sheet 40 which is a highly heat conductive silicone rubber sheet facilitates transfer of heat between sides sandwiching the rubber sheet 40.
[0068]
Moreover, the heat conductive sheet 30 is preferably a sheet containing carbon filler and resin. A sheet which is superior in heat conductivity, and which is flexible and which can be easily bent or curved can thus be realized. Accordingly, shaping according to the shape of a space having a complex shape, such as the inside of the battery 1 or the like, is enabled. Moreover, an electrical conduction property can be obtained by the presence of the carbon filler.
[0069]
Furthermore, because the current-carrying electrodes 60, 61 are provided, the battery cells 20 can be heated even in cold climates, and charging/discharging of the battery 1 or the like can be easily performed.
[0070]
With the battery 1 or the like, heat from the battery cell 20 can be transferred to the bottom portion 12 of the battery 1 or the like and the cooling member 15 through the protruding sheet portion 35 and the heat conductive sheet 30, regardless of the shape of the end portion of the battery cell 20 near the cooling member 15 and even if the battery cell 20 is light and cannot be expected to adhere to the heat dissipating structure by its own weight.
[0071]
Moreover, the battery 1 or the like further includes the rubber sheet 40 for closely fixing the heal conductive sheet 30 to at least the battery cells 20 or the surrounding of the cooling member 15 (such as the bottom portion 12, the side wall of the housing 11, or the like). The rubber sheet 40 contributes to increase heat dissipation from the battery cell 20 to the heat conductive sheet 30, or from the heat conductive sheet 30 to the bottom portion 12 or the like. Particularly, if the rubber sheet 40 is a sheet of silicone rubber, heat deterioration can be suppressed, and long lasting adhesion can be realized. Moreover, using the rubber sheet 40 which is a highly heat conductive silicone rubber sheet facilitates transfer of heat between sides sandwiching the rubber sheet 40. The rubber sheet 40 may be fixed to any side of the housing 11 or the heat dissipating structure 25 or the like before the heat dissipating structure 25 or the like is disposed in the battery 1 or the like.
[0072] (Fourth Embodiment)
Fig. 7 is a perspective view showing a state where the battery cells, which are an example of a heat source, are covered by a heat dissipating structure according to a fourth embodiment. Fig. 8 shows a vertical cross-sectional view of each of the heat dissipating structure in Fig. 7, and a battery including the heat dissipating structure.
[0073] A heat dissipating structure 125 according to the fourth embodiment is a heat dissipating structure which is provided between battery cells 120, which are an example of a heat source, and a cooling member 115, and which transfers heat from the battery cells 120 to the cooling member 115. The heat dissipating structure 125 includes a heat conductive sheet 130 which is a sheet containing at least one of metal, carbon, and ceramic, and which can be disposed between the battery cells 120 and the cooling member 115, and a rubbery elastic body 140 which can be disposed between the battery cells 120 and the cooling member 115 while being in contact with the heat conductive sheet 130. The heat conductive sheet 130 includes contact parts 132, 133, 134, 135, 136, 137 which are wound around half or more of the circumferences of the battery cells 120. [0074]
More specifically, as shown in Fig. 8, a battery lp is a battery including a plurality of battery cells 120, as heat sources, in a housing 111 in contact with the cooling member 115. The heat dissipating structure 125 for transferring heat from the battery cells 120 to the cooling member 115 is provided between end portions of the battery cells 120 near the cooling member 115 and a part (bottom portion 112) of the housing 111 near the cooling member 115. The heat dissipating structure 125 includes the heat conductive sheet 130 which contains at least one of metal, carbon, and ceramic, and which can be disposed between the battery cells 120 and the cooling member 115, and the rubbery elastic body 140 which can be disposed between the battery cells 120 and the cooling member 115 while being in contact with the heat conductive sheet 130. The heat conductive sheet 130 includes the contact parts 132, 133, 134, 135, 136, 137 which are wound around half or more of the circumferences of the battery cells 120.
[0075]
Furthermore, the contact parts 132, 133, 134, 135, 136, 137 of the heat conductive sheet 130 are parts that continuously cover a plurality of battery cells 120 in an S shape in cross section. As shown in Fig. 8, in the present embodiment, the battery lp includes eight battery cells 120. The eight battery cells 120 are alternately disposed in inner parts A of the heat conductive sheet 130 and inner parts B of the heat conducti ve sheet 130, the inner parts A having an inverse U shape which is open downward in Fig. 7 and the inner parts B having a U shape which is open upward in Fig. 7. The rubbery elastic body 140 is preferably at least partially surrounded by the heat conductive sheet 130 at a part of the heat conductive sheet 130 disposed between the battery cells 120 and the cooling member 115. Additionally, in the present application, a "cross section" or a "vertical cross section" refers to a cross section along a direction of vertically cutting from an upper opening surface of an inner portion 114 of the housing 111 of the battery lp to the bottom portion 112.
[0076] (1) Schematic Configuration of Battery
In the present embodiment, the battery lp is a battery of an electric vehicle, for example, and includes a large number of battery cells 120. The battery lp includes the bottomed housing 111 w'hich is open on one side. The housing 111 is preferably made of aluminum or aluminum-based alloy. The battery cells 120 are disposed adjacent to one another in the inner portion 114 of the housing 111. Electrodes 121, 122 are provided protruding from the top of each battery cell 120. One or a plurality of water-cooled pipes 113 where cooling water, which is an example of the cooling member 115, is to flow are provided in the bottom portion 112 of the housing 111. The battery cells 120 are disposed inside the housing 111 in a manner sandwiching the heat dissipating structure 125 with the bottom portion 112. With the battery lp having such a structure, heat of the battery cells 120 is transferred to the housing 111 through the heat dissipating structure 125, and is effectively removed by water cooling. Additionally, the cooling member 115 is not limited to cooling water, and is interpreted to include liquid nitrogen, and organic solvents such as ethanol. Under the conditions to be used for cooling, the cooling member 115 does not have to be liquid, but may be gas or solid.
[0077] (2) Heat Conductive Sheet
In the present embodiment, the heat conductive sheet 130 includes, between the plurality of battery cells 120 and the bottom portion 112, a part (including a corner portion of an extending portion 131 and the contact part 132) which is bent in a mirror-reversed L shape in a vertical cross section to rise along an inner side surface of the housing 111 from the extending portion 131 in contact with the bottom portion 112. The heat conductive sheet 130 is disposed with the bent part positioned at a bottom right corner of the inner portion 114 of the housing 111 in Fig. 8. The heat conductive sheet 130 extends upward from the bent part along a right side surface 120c of the rightmost battery cell 120 in Fig. 8. The heat conductive sheet 130 covers the eight battery cells 120, which are arranged in a left-right direction in Fig. 8, while bending in a substantially S shape to continuously contact the gaps of the battery cells 120 from the right side to the left side in Fig. 8.
[0078]
The heat conductive sheet 130 is provided in the battery lp while covering each battery cell 120 by extending along one side surface of the battery cell 120 to one of lop and bottom surfaces and then to the other side surface in the manner of an S shape or a snake shape. Details of a contact state between the heat conductive sheet 130 and each battery cell 120 are as below. [0079]
The heat conductive sheet 130 covers the rightmost battery cell 120 in Fig. 8 by the contact part 132 in contact with a right side surface 120c, the contact part 133 in contact with an upper surface 120a, the contact part 134 in contact with a left side surface 120d. Furthermore, the heat conductive sheet 130 covers the battery cell 120 second from the right in Fig. 8 by the contact part 134 in contact with a right side surface 120c, the contact part 135 in contact with a lower surface 120b, and the contact part 136 in contact with a left side surface 120d. Furthermore, the heat conductive sheet 130 covers the battery cell 120 third from the right in Fig. 8 by the contact part 136 in contact with a right side surface 120c, the contact part 133 in contact with an upper surface 120a, and the contact part 134 in contact with a left side surface 120d. In the same manner, the heal conductive sheet 130 covers the battery cell 120 fourth from the right in Fig. 8 by the contact part 134 in contact with a right side surface 120c, the contact part 135 in contact with a lower surface 120b, and the contact part 136 in contact with a left side surface 120d. Furthermore, the heat conductive sheet 130 covers the battery cell 120 fifth from the right in Fig. 8 by the contact parts 136, 133, 134 in the same manner as for the battery cell 120 third from the right. Moreover, the heat conductive sheet 130 covers the battery cell 120 sixth from the right in Fig. 8 by the contact parts 134, 135, 136 in the same manner as for the battery cell 120 fourth from the right. Moreover, the heat conductive sheet 130 covers the battery cell 120 seventh from the right in Fig. 8 by the contact parts 136, 133, 134 in the same manner as for the battery cell 120 fifth from the right. The heat conductive sheet 130 covers the battery cell 120 eighth from the right (i.e. leftmost) in Fig. 8 by the contact part 134 in contact with a right side surface 120c, the contact part 135 in contact with a lower surface 120b, the contact part 136 in contact with a left side surface 120d, and the contact part 137 in contact with an upper surface 120a.
[0080]
The contact part 133, 137 of the heat conductive sheet 130 includes slits 138, 139 allowing insertion of the electrodes 121, 122 of the battery cell 120. Accordingly, the contact part 133, 137 is able to adhere to or to be in nearly close contact with the upper surface 120a even though the electrodes 121, 122 are provided on the upper surface 120a of the battery cell 120. Furthermore, as will be described later, the heat conductive sheet 130 is thin and easily bendable. Accordingly, even if the upper surface 120a, the lower surface 120b, and the side surfaces 120c, 120d of the battery cell 120 are curved or uneven, the heat conductive sheet 130 can change its shape according to the shape of the outer circumferential surfaces 120a, 120b, 120c, 120d of the battery cell 120 to come into contact with the outer circumferential surfaces 120a, 120b, 120c, 120d.
[0081]
The heat conductive sheet 130 is like the heat conductive sheet 30. The heat dissipating structure 125 includes the rubbery elastic body 140 in an inner space formed by folding the heal conductive sheet 130 in a region between end portions of the plurality of battery cells 120 near the cooling member 115 (or the bottom portion 112 of the housing 111) (in the present embodiment, the end portions are the lower surfaces 120b of the battery cells 120) and an inner bottom surface of the bottom portion 112.
[0082] (3) Rubbery Elastic Body
The rubbery elastic body 140 is at least partially surrounded by the heat conductive sheet 130 at the part, of the heat conductive sheet 130, disposed between the battery cells 120 and the cooling member 115. More specifically, the rubbery elastic body 140 is provided in contact with the heat conductive sheet 130 in such a way as to fill the space between the extending portion 131 and the lower surfaces 120b of the battery cells 120 and the contact parts 135. The rubbery elastic body 140 has a cushioning function between the battery cells 120 and the bottom portion 112, and a function as a protective member which prevents the heat conductive sheet 130 from being damaged due to a load applied to the heat conductive sheet 130. The rubbery elastic body 140 is a member having lower heal conductivity than the heat conductive sheet 130. The material of the rubbery elastic body 140 is the same as that of the rubbery elastic body 31.
[0083] (4) Rubber Sheet
In the present embodiment, the rubber sheet 40 (see Figs. 2, 4) is preferably a sheet which is disposed between the battery cell 120 and the heat conductive sheet 130, and between the bottom portion 112 and the heat conductive sheet 130, but is not an essential structure of the battery lp or the heat dissipating structure 125. The rubber sheet 40 can be formed from various types of elastic bodies as in the case of the rubbery elastic body 140 described above, but the rubber sheet 40 is preferably a sheet containing silicone rubber superior in heat conductivity because heat from the battery cell 120 has to be rapidly transferred to the heat conductive sheet 130. The rubber sheet 40 has a function of increasing the adhesion between the battery cell 120 and the heat conductive sheet 130, or the adhesion between the surrounding of the cooling member 115 (the bottom portion 112, side wall of the housing 111, etc.) and the heat conductive sheet 130. The rubber sheet 40 is a sheet member having tackiness or bonding ability to members sandwiching the rubber sheet 40. The rubber sheet 40 may be disposed between the heat conductive sheet 130. For example, in a fifth embodiment described later, the rubber sheet 40 may be disposed between an extending portion 151 and a contact part 152. For example, a battery lq further includes a rubber sheet 40 for closely fixing the heat conductive sheet 130 to at least the heat conductive sheet 130, the battery cells 120, or the surrounding of the cooling member 115, and the rubber sheet 40 may be interposed between one part of the heat conductive sheet 130 and another part of the heat conductive sheet 130 formed by covering one battery cell 120 by the heat conductive sheet 130 and then reversing the covering direction. Accordingly, even if there is a folded part when wrapping the heat conductive sheet 130 around the battery cell 120, the heat conductive sheet 130 may be wrapped while being fixed by the rubber sheet.
[0084] (5) Preferred Battery Assembly Method (a) A resin material typified by PPS or the like, and graphite filler and/or carbon filler having lower crystallinity than graphite (preferably in the form of particles, fibers, etc.) are agitated in a liquid (such as waler), and a felt-like sheet is fabricated in the manner of papermaking. (b) Subsequently, the felt-like sheet is bent to have the same or similar cross-sectional shape as the heat conductive sheet 130 in Fig. 8. (c) The rubbery elastic body 140 is fixed at a part of the heat conductive sheet 130, and the heat dissipating structure 125 is completed. (d) Lastly, the heat dissipating structure 125 is embedded in the battery lp.
[0085] (Fifth Embodiment)
Fig. 9 shows each of a vertical cross-sectional view (9A) of a heat dissipating structure according to a fifth embodiment and a battery including the heat dissipating structure, and a view (9B) schematically showing a cross-sectional shape of a heat conductive sheet in (9A).
[0086] A heat dissipating structure 125a and a battery lq according to the fifth embodiment are the same as the heat dissipating structure 125 and the battery lp according to the fourth embodiment except that, with the heat dissipating structure 125a and the battery lq, the heat conductive sheet 130 covers each battery cell 120. In the following, the manner of the heat conductive sheet 130 covering each battery cell 120 will be mainly described.
[0087] (1) Covering of Each Battery Cell by Heat Conductive Sheet
As shown in Fig. 9, the heat conductive sheet 130 constituting the heat dissipating structure 125a covers each battery cell 120 around the entire or almost entire outer circumference of the battery cell 120. Specifically, the heal conductive sheet 130 covers a lower surface 120b of the rightmost battery cell 120 in Fig. 9 (9A) by an extending portion 151 and a contact part 152 folded back from the extending portion 151, covers a right side surface 120c of the battery cell 120 by a contact part 153, covers an upper surface 120a of the battery cell 120 by a contact part 154, and covers a left side surface 120d of the battery cell 120 by a contact part 155. The heat conductive sheet 130 then continuously covers a lower surface 120b of the battery cell 120 second from the right in Fig. 9 (9A) by the extending portion 151 and the contact part 152 folded back from the extending portion 151, covers a right side surface 120c of the battery cell 120 by the contact part 153, covers an upper surface 120a of the battery cell 120 by the contact part 154, and covers a left side surface 120d of the battery cell 120 by the contact part 155. Other battery cells 120 of the battery lq, which are arranged from the right to the left in Fig. 9, are covered in the same manner. Lastly, the heat conductive sheet 130 covers a lower surface 120b of the leftmost battery cell 120 in Fig. 9 by the extending portion 151 (which may alternatively be referred to as "contact part 151"), covers a left side surface 120d of the battery cell 120 by a contact part 156, and covers an upper surface 120a of the battery cell 120 by a contact part 157. By wrapping the heat conductive sheet 130 in this manner around the outer circumferences of the battery cells 120 in the directions indicated by arrows in Fig. 9 (9B), the plurality of battery cells 120 may be continuously covered by one heat conductive sheet 130. Each of the contact parts 151,152, 153, 154, 155 is a part that covers one battery cell 120 and then covers another battery cell 120 different from the one battery cell 120 by being folded back by reversal of the covering direction. Such other battery cell 120 is desirably arranged adjacent to the one battery cell 120, but may be arranged at another position. Additionally, in the present embodiment, the heat conductive sheet 130 does not include the extending portion 131 provided in the fourth embodiment.
[0088] (2) Rubbery Elastic Body
The rubbery elastic body 140 is provided at a part of the heat conductive sheet 130, at a position closer to the cooling member 115 than the parts of the heat conductive sheet 130 covering the battery cells 120. Specifically, the rubbery elastic body 140 is disposed in a space between the heat conductive sheet 130 (mainly the contact part 151) in contact with the lower surface 120b of each battery cell 120 and the bottom portion 112 where the cooling member 115 flows. The rubbery elastic body 140 is in contact with the bottom portion 112 without the heat conductive sheet 130 interposed therebetween. Additionally, the rubber sheet 40 may be interposed between the rubbery elastic body 140 and the heat conductive sheet 130. In the present embodiment, heat transferred from the battery cells 120 to the heat conductive sheet 130 is transferred to the cooling member 115 flowing through inside of the bottom portion 112, through the housing 111 in contact with the heal conductive sheet 130 or through the rubbery elastic body 140 in contact with the heat conductive sheet 130.
[0089] (3) Preferred Battery Assembly Method
The heat dissipating structure 125a is manufactured by the same method as in the fourth embodiment, and is embedded in the battery 1 q.
[0090] (Sixth Embodiment)
Fig. 10 shows a vertical cross-sectional view of each of a heat dissipating structure according to a sixth embodiment, and a battery including the heat dissipating structure. Fig. 11 shows an enlarged view (1IA) and an enlarged view (11B), respectively, of a region Cl and a region DI in Fig. 10.
[0091] A heat dissipating structure 125b and a battery lr according to the sixth embodiment are approximately the same as the heat dissipating structure 125a and the battery Iq according to the fifth embodiment except that, with the heat dissipating structure 125b and the battery lr, a currentcarrying mechanism is provided at both ends of the heat conductive sheet 130 which are protruded upward from inner side surfaces of the housing 111. Differences from the fifth embodiment will be mainly described below.
[0092] (1) Current-Carrying Mechanism
In the present embodiment, the heat conductive sheet 130 has electrical conductivity, and generates heat which is due to resistance during current conduction. A positive lead wire 160 and a negative lead wire 161 are connected to parts, or in this example, a terminal sheet portion 150 and a contact part 156, of the heat conductive sheet 130. When a voltage is applied between the lead wires 160, 161, a current flows through the heat conductive sheet 130 and heat is generated. The terminal sheet portion 150 is connected to the extending portion 151. The contact part 156 is a part which is extended upward from the contact part 156 in the second embodiment without forming the contact part 157.
[0093]
As shown in Fig. 11(11A), the lead wire 160 is connected to a current-carrying electrode 170. The current-carrying electrode 170 is fixed to the terminal sheet portion 150. As shown in Fig. 11(1 IB), the lead wire 161 is connected to a current-carrying electrode 171 in the same manner. The current-carrying electrode 171 is fixed to the contact part 156. In the present embodiment, the current-carrying electrode 170, 171 is a thin film that is formed by applying a paste containing metal filler on a surface of the heat conductive sheet 130. The paste containing metal filler is suitably a paste containing silver filler (i.e. silver paste), for example. In such a case, the thin film is a silver thin film. However, the current-carrying electrode 170, 171 may alternatively be made by applying a paste containing a metal material, other than silver, having relatively high electrical conductivity. Furthermore, the method for forming the current-carrying electrode 170, 171 is not particularly limited, and brushing or printing may be used, for example. In the present embodiment, the current-carrying electrode 170, 171 is formed on a surface of the heat conductive sheet 130. Alternatively, the current-carrying electrode 170, 171 may be formed on a region recessed inward from the surface of the heat conductive sheet 130, or may be embedded inside the heat conductive sheet 130. Furthermore, a rubber sheet may be interposed between the terminal sheet portion 150 (or the contact part 156) and a side wall of the housing 111 or between a side surface of the battery cell 120 and the terminal sheet portion 150 (or the contact part 156), and the current-carrying electrode 170, 171 may be formed on the surface or inside the rubber sheet. Moreover, the current-carrying electrodes 170, 171 may be formed, respectively, to other two contact parts which are separate from each other.
[0094] (2) Preferred Battery Assembly Method
Steps the same as the assembly steps (a) to (d) in the fourth embodiment are performed, and after the steps or after (a), the current-carrying electrodes 170, 171 and the lead wires 160, 161 are fixed to the heal conductive sheet 130.
[0095] (Operations/Effects of Each Embodiment)
With the heat dissipating structure 125, 125a, 125b (hereinafter referred to as "heat dissipating structure 125 or the like") according to each embodiment described above, heat from the battery cell 120 can be transferred to the bottom portion 112 of the battery lp, lq, lr (hereinafter referred to as "battery lp or the like") and the cooling member 115 through the contact part 132, 133, 134, 135, 136, 137 (or 151, 152, 153, 154, 155, 156, 157) of the heat conductive sheet 130, regardless of the shape of the end portion of the battery cell 120 near the cooling member 115 and even if the battery cell 120 is light and cannot be expected to adhere to the heat dissipating structure by its own weight. Moreover, by wrapping the heat conductive sheet 130 having electrical conductivity around half or more of the outer circumference of the battery cell 120, it is possible to effectively shield electromagnetic waves generated by the battery cell 120. Such an effect will be referred to as "electromagnetic shielding effect".
[0096]
Furthermore, with the configuration of the heat conductive sheet 130 described above, half of more of the outer circumferential surfaces of the plurality of battery cells 120 may be covered by one heat conductive sheet 130 which is made as short as possible. Accordingly, the adhesion between the battery cells 120 and the heat conductive sheet 130 may be increased at as little resources as possible and with facility, and high heat dissipation property can thereby be expected. Furthermore, the battery cells 120 may be covered at more than half the outer circumferences to be entirely or approximately entirely covered. This allows heat from the battery cells 120 to be easily transferred to the heat conductive sheet 130, and the heat dissipation property can be further increased. Moreover, when the heat conductive sheet 130 having electrical conductivity is used, the electromagnetic shielding effect mentioned above can be further increased.
[0097]
Furthermore, because the heat conductive sheet 130 includes the rubbery elastic body 140, adhesion between the battery cells 120 and the heat dissipating structure 125 or the like can be increased even if the end portions of the battery cells 120 are not horizontal, that is, even if steps are formed by the end portions. This contributes to increase the heat dissipation property.
Furthermore, in addition to the issues regarding the steps mentioned above, the heat conductive sheet 130 may be effectively used as a heat transfer medium. This means that, as in the first embodiment, when the heat conductive sheet 130 has a mirror-reversed L shape and the rubbery elastic body 140 is disposed on the inside, heat from the battery cells 120 is easily transferred through the heat conductive sheet 130 to the bottom portion 112 and the cooling member 115. [0098]
With the battery lp or the like, heat from the battery cell 120 can be transferred to the bottom portion 112 of the battery lp or the like and the cooling member 115 through the contact part 132, 133, 134, 135, 136, 137 (or 151, 152, 153, 154, 155, 156, 157) of the heat conductive sheet 130, regardless of the shape of the end portion of the battery cell 120 near the cooling member 115 and even if the battery cell 120 is light and cannot be expected to adhere to the heat dissipating structure by its own weight. Moreover, using the heat conductive sheet 130 having electrical conductivity allows the electromagnetic shielding effect to be increased.
[0099] (Other Embodiments)
Preferred embodiments of the present invention have been described above, but the present invention is not limited to the embodiments, and various modifications are allowed. [0100]
For example, a heat source may be any object that generates heat, such as a circuit board or an electronic appliance main body, without being limited to the battery cell 20, 120. For example, a heat source may be an electronic component such as a capacitor or an 1C chip. Moreover, the cooling member 15, 115 may be an organic solvent, liquid nitrogen, or a cooling gas without being limited to cooling water. Moreover, the heat dissipating structure 25 or the like or the heat dissipating structure 125 or the like may be disposed in a structure other than the battery 1 or the like or the battery lp or the like, such as an electronic appliance, a household appliance, a power generator or the like.
[0101]
In each of the embodiments described above, the rubbery elastic body 31 is disposed in an inner space formed by bending or curving the heat conductive sheet 30, or in a space between the heat conductive sheet 30 and the bottom portion 12, but the rubbery elastic body 31 may extend in a space other than the spaces mentioned above.
[0102]
In each of the embodiments, the rubber sheet 40 is provided between the heat conductive sheet 30 and the heat source, or between the heat conductive sheet 30 and the bottom portion 12, but this is not restrictive. For example, the rubber sheet 40 may be provided between the terminal sheet portion 36 and the inner surface of the side wall of the housing 11. Moreover, the rubber sheet 40 may be in contact or in close contact with the heat source and the bottom portion 12 instead of being bonded thereto, and may be easily detachable from the heat source and the bottom portion 12. Moreover, in the third embodiment, the heat conductive sheet 30 is in contact with the inner surface of the side wall of the housing 11 at above (on the battery cell 20 side of) the rubbery elastic body 31, but the heat conductive sheet 30 may alternatively be in contact with the inner surface of the side wall on the rubbery elastic body 31 side (i.e. on the bottom side).
[0103]
The contact parts, of the heat conductive sheet 130, in contact with the battery cells 120 may be parts covering two battery cells 120 by one S shape in cross section. In Fig. 9 (9B), the extending portion 151 on the right, the contact part 152 on the right, or the contact part 157 on the left is not necessarily required. Moreover, the number of heat conductive sheets 130 is not limited to one, and two or more heat conductive sheets 130 may be used to cover the battery cells 120 separately or in a unit of two or more.
[0104]
Furthermore, the plurality of structural elements in the embodiments described above may be freely combined except when combination of structural elements is not possible. For example, in the third embodiment, the protruding sheet portion 35 having the rubbery elastic body 31 inside may be provided, as in the second embodiment. Moreover, the current-carrying electrodes 60, 61 may be provided in the first or second embodiment. Moreover, the currentcarrying mechanisms in the sixth embodiment may be provided in the fourth embodiment.
INDUSTRIAL APPLICABILITY
[0105]
The heat dissipating structure according to the present invention may be used in various electronic appliances other than vehicle batteries, such as vehicles, industrial robots, power generators, PCs, and home electronic products. The battery according to the present invention may be used as other than vehicle batteries, such as rechargeable home batteries, and batteries of electronic appliances such as PCs.

Claims (25)

1. Warmteafvoerende structuur voorzien tussen een warmtebron en een koelelement voor het overbrengen van warmte van de warmtebron naar het koelelement, waarbij de warmleafvoerende structuur omvat: een warmtegeleidend vel dat ten minste één van de groep van metaal, koolstof en keramiek bevat, en in staat is om te worden geplaatst tussen de warmtebron en het koelelement; en een rubberachtig elastisch lichaam dat in staat is om te worden geplaatst tussen de warmtebron en het koelelement terwijl het in contact is met het warmtegeleidende vel, waarbij het warmtegeleidende vel een uitstekend velgedeelte omvat dat in staat is om te worden geplaatst om zich in een opening tussen een aantal warmtebronnen uit te strekken.A heat-dissipating structure provided between a heat source and a cooling element for transferring heat from the heat source to the cooling element, the heat-dissipating structure comprising: a heat-conducting sheet containing at least one of the group of metal, carbon and ceramic, and capable of is to be placed between the heat source and the cooling element; and a rubbery elastic body capable of being placed between the heat source and the cooling element while in contact with the heat conducting sheet, the heat conducting sheet comprising a protruding sheet portion capable of being placed in an opening between a number of heat sources. 2. Warmleafvoerende structuur volgens conclusie 1, waarbij het warmtegeleidende vel, bij een deel geplaatst tussen de warmtebron en het koelelement, een eerste gevouwen vorm, die in dwarsdoorsnede in een U-vorm of een V-vorm is gevouwen, of een eerste zakvorm, die ringvormig in dwarsdoorsnede is, heeft en het rubberachtige elastische lichaam is geplaatst in een binnengedeelte van de eerste gevouwen vorm of de eerste zakvorm.The heat-conducting structure according to claim 1, wherein the heat-conducting sheet, placed in part between the heat source and the cooling element, is a first folded shape, which is folded in cross-section into a U-shape or a V-shape, or a first pocket shape, which is annular in cross section and the rubbery elastic body is placed in an inner portion of the first folded form or the first bag form. 3. Warmleafvoerende structuur volgens conclusie 1 of 2, waarbij het uitstekende velgedeelte een tweede gevouwen vorm, die in dwarsdoorsnede in een U-vorm of een V-vorm is gevouwen, of een tweede zakvorm, die in dwarsdoorsnede ringvormig is, heeft en het rubberachtige elastische lichaam gedeeltelijk is geplaatst in een binnengedeelte van de tweede gevouwen vorm of de tweede zakvorm.The heat-dissipating structure of claim 1 or 2, wherein the protruding sheet portion has a second folded shape, which is folded in cross-section into a U-shape or a V-shape, or a second bag shape, which is ring-shaped in cross-section, and the rubbery elastic body is partially placed in an inner portion of the second folded shape or the second bag shape. 4. Warmteafvoerende structuur volgens ten minste één der conclusies 1-3, verder omvattende een rubbervel voor het op korte afstand bevestigen van het warmtegeleidende vel aan ten minste één van de warmtebron en een omgeving van het koelelement.A heat-dissipating structure according to at least one of claims 1 to 3, further comprising a rubber sheet for affixing the heat-conducting sheet at a short distance to at least one of the heat source and an environment of the cooling element. 5. Warmteafvoerende structuur volgens conclusie 4, waarbij het rubbervel een siliconen rubbervel is.The heat dissipating structure of claim 4, wherein the rubber sheet is a silicone rubber sheet. 6. Warmteafvoerende structuur volgens ten minste één der conclusies 1-5, waarbij het warmtegeleidende vel een vel is dat koolstof vulmiddel en hars omvat.The heat-dissipating structure according to at least one of claims 1 to 5, wherein the heat-conducting sheet is a sheet comprising carbon filler and resin. 7. Warmteafvoerende structuur volgens ten minste één der conclusies 1-6, verder omvattende stroom-dragende elektroden die in staat zijn om vermogen te leveren om het warmlegeleidende vel of het rubberachtige elastische lichaam te verwarmen.The heat-dissipating structure of at least one of claims 1 to 6, further comprising current-carrying electrodes capable of providing power to heat the heat-conducting sheet or the rubbery elastic body. 8. Batterij omvattende een aantal batterijcellen als warmtebronnen in een behuizing, die in contact staat met een koelelement, omvattende een warmteafvoerende structuur voor het overbrengen van warmte van de batterijcellen aan het koelelement, waarbij de warmteafvoerende structuur is voorzien tussen eindgedeelten van de batterijcellen nabij het koelelement en een deel van de behuizing nabij het koelelement, waarbij de warmteafvoerende structuur omvat een warmtegeleidend vel dat ten minste één van de groep van metaal, koolstof en keramiek bevat, en in slaat is om te worden geplaatst tussen de batterijcellen en het koelelement; en een rubberachtig elastisch lichaam dat in staat is om te worden geplaatst tussen de batterij cellen en het koelelement terwijl het in contact is met het warmtegeleidende vel, en hel warmtegeleidende vel een uitstekend velgedeelte omvat dat in slaat is om te worden geplaatst om zich in een opening tussen het aantal batterijcellen uit te strekken.A battery comprising a plurality of battery cells as heat sources in a housing which is in contact with a cooling element, comprising a heat-dissipating structure for transferring heat from the battery cells to the cooling element, the heat-dissipating structure being provided between end portions of the battery cells near the cooling element and a part of the housing near the cooling element, the heat-dissipating structure comprising a heat-conducting sheet containing at least one of the group of metal, carbon and ceramic, and being in storage to be placed between the battery cells and the cooling element; and a rubbery elastic body capable of being placed between the battery cells and the cooling element while in contact with the thermally conductive sheet, and the thermally conductive sheet comprising a protruding sheet portion which is capable of being placed in a gap between the number of battery cells to extend. 9. Batterij volgens conclusie 8, waarbij het warmtegeleidende vel, bij een deel geplaatst tussen de batterijcellen en het koelelement, een eerste gevouwen vorm, die in dwarsdoorsnede in een U-vorm of een V-vorm is gevouwen, of een eerste zakvorm, die ringvormig in dwarsdoorsnede is, heeft en het rubberachtige elastische lichaam is geplaatst in een binnengedeelte van de eerste gevouwen vorm of de eerste zakvorm.The battery of claim 8, wherein the heat conducting sheet, placed at a portion between the battery cells and the cooling element, is a first folded shape, which is folded in cross-section into a U shape or a V shape, or a first bag shape, is annular in cross-section, and the rubbery elastic body is placed in an inner portion of the first folded shape or the first bag shape. 10. Batterij volgens conclusie 8 of 9, waarbij het uitstekende velgedeelte een tweede gevouwen vorm, die in dwarsdoorsnede in een U-vorm of een V-vorm is gevouwen, of een tweede zakvorm, die in dwarsdoorsnede ringvormig is, heeft en het rubberachtige elastische lichaam gedeeltelijk is geplaatst in een binnengedeelte van de tweede gevouwen vorm of de tweede zakvorm.The battery of claim 8 or 9, wherein the protruding sheet portion has a second folded shape, which is folded in cross-section into a U-shape or a V-shape, or a second bag shape, which is ring-shaped in cross-section, and the rubbery elastic body is partially placed in an inner portion of the second folded form or the second bag form. 11. Batterij volgens ten minste één der conclusies 8-10, verder omvattende een rubbervel voor het op korte afstand bevestigen van het warmtegeleidende vel aan ten minste één van de batterij cellen en een omgeving van het koelelement.The battery of at least one of claims 8-10, further comprising a rubber sheet for attaching the heat-conducting sheet at a short distance to at least one of the battery cells and an environment of the cooling element. 12. Batterij volgens ten minste één der conclusies 8-11, verder omvattende stroom-dragende elektroden die in staat zijn om vermogen te leveren om het warmtegeleidende vel of het rubberachtige elastische lichaam te verwarmen.The battery of at least one of claims 8-11, further comprising current carrying electrodes capable of supplying power to heat the heat conducting sheet or the rubbery elastic body. 13. Warmteafvoerende structuur geplaatst tussen een warmtebron en een koelelement voor het overbrengen van warmte van de warmtebron naar het koelelement, waarbij de warmteafvoerende structuur omvat: een warmtegeleidend vel dat ten minste één van de groep van metaal, koolstof en keramiek bevat, en in slaat is om te worden geplaatst tussen de warmtebron en het koelelement; en een rubberachtig elastisch lichaam dat in staat is om te worden geplaatst tussen de warmtebron en het koelelement terwijl het in contact is met het warmtegeleidende vel, waarbij het warmtegeleidende vel een contactdeel omvat, dat is gewikkeld rond de helft of meer van een omtrek van de warmtebron.A heat dissipating structure interposed between a heat source and a cooling element for transferring heat from the heat source to the cooling element, the heat dissipating structure comprising: a heat-conducting sheet containing at least one of the group of metal, carbon and ceramic is to be placed between the heat source and the cooling element; and a rubbery elastic body capable of being placed between the heat source and the cooling element while in contact with the heat conducting sheet, the heat conducting sheet comprising a contact part wrapped around half or more of a circumference of the heat source. 14. Warmteafvoerende structuur volgens conclusie 13, waarbij het warmtegeleidende vel, in dwarsdoorsnede in een S-vorm of in onafgebroken S-vormen, een veelheid aan warmtebronnen bedekt.The heat dissipating structure of claim 13, wherein the heat conducting sheet, in cross section in an S shape or in continuous S shapes, covers a plurality of heat sources. 15. Warmteafvoerende structuur volgens conclusie 13, waarbij het warmtegeleidende vel een ene warmtebron en een andere warmtebron, die verschillend is van de ene warmtebron, bedekt door te zijn teruggevouwen door het omkeren van een bedekkingsrichting.The heat-dissipating structure of claim 13, wherein the heat-conducting sheet covers one heat source and another heat source, which is different from the one heat source, by being folded back by reversing a covering direction. 16. Warmteafvoerende structuur volgens ten minste één van de conclusies 13 -15, waarbij het rubberachtige elastische lichaam is voorzien op het warmtegeleidende vel op een positie die dichter bij het koelelement, dan bij een deel van het warmtegeleidende vel dat de warmtebron bedekt, is gelegen.The heat dissipating structure according to at least one of claims 13 to 15, wherein the rubbery elastic body is provided on the heat conducting sheet at a position closer to the cooling element than to a part of the heat conducting sheet covering the heat source . 17. Warmteafvoerende structuur volgens conclusie 16, waarbij het rubberachtige elastische lichaam ten minste gedeeltelijk is omgeven door het warmtegeleidende vel bij een deel van het warmtegeleidende vel dal is geplaatst tussen de warmtebron en hel koelelement.The heat dissipating structure of claim 16, wherein the rubbery elastic body is at least partially surrounded by the heat conducting sheet at a portion of the heat conducting sheet placed between the heat source and the heat sink. 18. Warmteafvoerende structuur volgens ten minste één van de conclusies 13-17, waarbij het warmtegeleidende vel een vel is dat koolstof vulstof en hars omvat.The heat-dissipating structure according to at least one of claims 13-17, wherein the heat-conducting sheet is a sheet comprising carbon filler and resin. 19. Warmteafvoerende structuur van een van de conclusies 13 tot 18, verder omvattende stroom-dragende elektroden die in staat zijn om vermogen te leveren om het warmtegeleidende vel of het rubberachtige elastische lichaam te verwarmen.The heat-dissipating structure of any one of claims 13 to 18, further comprising current-carrying electrodes capable of providing power to heat the heat-conducting sheet or the rubbery elastic body. 20. Batterij omvattende een aantal batterijcellen als warmtebronnen in een behuizing, die in contact staat met een koelelement, omvattende een warmteafvoerende structuur voor het overbrengen van warmte van de batterijcellen aan het koelelement, waarbij de warmteafvoerende structuur is voorzien tussen eindgedeelten van de batterijcellen nabij het koelelement en een deel van de behuizing nabij het koelelement, waarbij de warmteafvoerende structuur omvat een warmtegeleidend vel dat ten minste één van de groep van metaal, koolstof en keramiek bevat, en in staat is om te worden geplaatst tussen de batterijcellen en het koelelement; en een rubberachtig elastisch lichaam dat in staat is om te worden geplaatst tussen de batterijcellen en het koelelement terwijl het in contact is met het warmtegeleidende vel, en het warmtegeleidende vel een contactdeel omvat, dat is gewikkeld rond de helft of meer van de omtrekken van de batterijcellen.A battery comprising a plurality of battery cells as heat sources in a housing in contact with a cooling element, comprising a heat-dissipating structure for transferring heat from the battery cells to the cooling element, the heat-dissipating structure being provided between end portions of the battery cells near the cooling element and part of the housing near the cooling element, the heat-dissipating structure comprising a heat-conducting sheet containing at least one of the group of metal, carbon and ceramic, and capable of being placed between the battery cells and the cooling element; and a rubbery elastic body capable of being placed between the battery cells and the cooling element while in contact with the heat-conducting sheet, and the heat-conducting sheet comprising a contact part wrapped around half or more of the circumferences of the battery cells. 21. Batterij volgens conclusie 20, waarbij het warmtegeleidende vel, in dwarsdoorsnede in een S-vorm of in onafgebroken S-vormen, een veelheid aan batterijcellen bedekt.The battery of claim 20, wherein the heat-conducting sheet, in cross section in an S shape or in continuous S shapes, covers a plurality of battery cells. 22. Batterij volgens conclusie 20, waarbij het warmtegeleidende vel een ene batterijcel en dan een andere batterijcel, die verschillend is van de ene batterijcel, bedekt door te zijn teruggevouwen door het omkeren van een bedekkingsrichting.The battery of claim 20, wherein the thermally conductive sheet covers one battery cell and then another battery cell, which is different from the one battery cell, by being folded back by reversing a coating direction. 23. Batterij volgens conclusie 22, verder omvattende een rubbervel voor het op korte afstand bevestigen van het warmtegeleidende vel aan van ten minste één van het warmtegeleidende vel, de batterijcellen of een omgeving van het koelelement, waarbij het rubbervel is geplaatst tussen een ene deel van het warmtegeleidende vel en een ander deel van het warmtegeleidende vel dat is gevormd door het bedekken van ene batterijcel met hel warmtegeleidende vel en het vervolgens terugvouwen van het warmtegeleidende vel door het omkeren van een bedekkende richting.The battery of claim 22, further comprising a rubber sheet for attaching the heat conducting sheet to at least one of the heat conducting sheet, the battery cells, or an environment of the cooling element at a short distance, the rubber sheet being interposed between one portion of the thermally conductive sheet and another part of the thermally conductive sheet formed by covering one battery cell with the thermally conductive sheet and then folding back the thermally conductive sheet by reversing a covering direction. 24. Batterij volgens ten minste één der conclusies 20-23, waarbij het rubberachtige elastische lichaam is voorzien op het warmtegeleidende vel op een positie dichter bij het koelelement dan een deel van het warmtegeleidende vel dal de batterijcellen bedekt.The battery of at least one of claims 20-23, wherein the rubbery elastic body is provided on the heat-conducting sheet at a position closer to the cooling element than a portion of the heat-conducting sheet covering the battery cells. 25. Batterij volgens ten minste één der conclusies 20 - 24, verder omvattende stroom-dragende elektroden die in staat zijn om vermogen te leveren om het warmtegeleidende vel of het rubberachtige elastische lichaam te verwarmen.The battery of at least one of claims 20 to 24, further comprising current carrying electrodes capable of providing power to heat the heat conducting sheet or the rubbery elastic body.
NL2019888A 2017-10-26 2017-11-10 Heat dissipating structure, and battery provided with the same NL2019888B1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL2019888A NL2019888B1 (en) 2017-11-10 2017-11-10 Heat dissipating structure, and battery provided with the same
PCT/JP2018/038596 WO2019082751A1 (en) 2017-10-26 2018-10-17 Heat dissipating structure, and battery provided with the same
CN201890001034.4U CN212162033U (en) 2017-10-26 2018-10-17 Heat radiation structure and storage battery having the same
DE212018000344.0U DE212018000344U1 (en) 2017-10-26 2018-10-17 Heat dissipation structure and battery provided with it
CN201890001033.XU CN212085181U (en) 2017-10-26 2018-10-17 Heat radiation structure and storage battery having the same
PCT/JP2018/038597 WO2019082752A1 (en) 2017-10-26 2018-10-17 Heat dissipating structure, and battery provided with the same
JP2020508638A JP7116781B2 (en) 2017-10-26 2018-10-17 Heat dissipation structure and battery with same
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE212018000344U1 (en) 2017-10-26 2020-05-29 Shin-Etsu Polymer Co., Ltd. Heat dissipation structure and battery provided with it

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0955456A (en) * 1995-08-15 1997-02-25 Shin Etsu Polymer Co Ltd Semiconductor device cooling structure
US20050039879A1 (en) * 2003-08-05 2005-02-24 Agilent Technologies, Inc. Heat transmission member and an electronics device using the member

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0955456A (en) * 1995-08-15 1997-02-25 Shin Etsu Polymer Co Ltd Semiconductor device cooling structure
US20050039879A1 (en) * 2003-08-05 2005-02-24 Agilent Technologies, Inc. Heat transmission member and an electronics device using the member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE212018000344U1 (en) 2017-10-26 2020-05-29 Shin-Etsu Polymer Co., Ltd. Heat dissipation structure and battery provided with it
DE212018000345U1 (en) 2017-10-26 2020-05-29 Shin-Etsu Polymer Co., Ltd. Heat dissipation structure and battery provided with it

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