CN110380156A - A kind of high-strength composite heat-conducting silica gel sheet for new energy car battery - Google Patents
A kind of high-strength composite heat-conducting silica gel sheet for new energy car battery Download PDFInfo
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- CN110380156A CN110380156A CN201910664395.8A CN201910664395A CN110380156A CN 110380156 A CN110380156 A CN 110380156A CN 201910664395 A CN201910664395 A CN 201910664395A CN 110380156 A CN110380156 A CN 110380156A
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- silica gel
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- new energy
- composite heat
- car battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
-
- 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
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The present invention relates to a kind of high-strength composite heat-conducting silica gel sheets for new energy car battery, including five-layer structure, it is followed successively by release film I, high thermal conductive silicon film I, highly-conductive hot carbon fiber cloth, high thermal conductive silicon film II and release film II from top to bottom, compared with prior art, due to being added to high-strength carbon fiber cloth, composite heat-conducting silica gel piece thermal coefficient can accomplish 6w/m.k or so, and (2.8 ~ 3w/m.k) improves 1 times or so on the basis of prior art；Material attachment is good, since intensity is higher, and has carbon cloth to support, and can arbitrarily bend is not in fragmentation situation；High-intensitive and bendable folding endurance can be kept while high thermal conductivity is provided, and more efficient heat-conducting effect is provided to new energy car battery.
Description
Technical field
The invention belongs to battery packaging material technical fields, are related to a kind of high-strength composite for new energy car battery
Heat-conducting silica gel sheet.
Background technique
In recent years, due to the inspiration of national sustainable development policy and new-energy automobile encouragement policy, New energy electric vapour
Vehicle is developed rapidly, and is more and more favored by consumer.
Pure electric automobile is a kind of automobile using single battery as stored energy power source, it is using battery as storage
Motility source provides electric energy, drive motor operating, to push running car to motor by battery.Lithium ion power
Battery is had extended cycle life with it, energy density is high, operating voltage rapidly becomes the hot spot that people study, but in cell operations
Heat history is serious, and there is an urgent need to Heat Conduction Materials to solve thermal buildup issue.
The Heat Conduction Materials such as metal, graphite flake, though heating conduction is good, since brittleness is big, difficult forming etc. is difficult to realize answer
With.At present common method be entire battery pack is wrapped around using heat-conducting silica gel sheet, but it is higher due to silica gel piece thermal coefficient when,
Intensity decline is obvious, and when winding operation will appear fragmentation problem, therefore common silica gel piece thermal coefficient is lower, substantially in 3w/
M.k is hereinafter, can not meet the custom requirements that battery temperature difference between the two ends are not more than 10 degree.Some new-energy automobile producers use artificial stone
Ink radiates, but electrographite itself is more crisp and conductive, usually need to coat one layer of insulation film on graphite flake surface, this can lead
The thermal coefficient of graphite flake is caused to have a greatly reduced quality.And since insulation film is inviscid, cannot be fitted closely between battery pack, and air
Thermal resistance is larger, further weakens its heat-conducting effect.
Therefore, it is necessary to seek a kind of high-strength composite heat-conducting silica gel sheet for new energy car battery.
Summary of the invention
It is an object of the invention to invent a kind of high-strength composite heat-conducting silica gel sheet for new energy car battery, solve
Above-mentioned technical problem.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of height for new energy car battery
Intensity composite heat-conducting silica gel piece, including five-layer structure are followed successively by release film I, high thermal conductive silicon film I, highly-conductive hot carbon from top to bottom
The material of fiber cloth, high thermal conductive silicon film II and release film II, the high thermal conductive silicon film I and high thermal conductive silicon film II is silica gel
Slurry, preparation method are: the upper and lower paying out reel of tri-roll press machine is placed into the release film I and release film II respectively, it is intermediate
Paying out reel places the highly-conductive hot carbon fiber cloth, and the silica gel slurry half is discharged on the release film II before scraper,
The highly-conductive hot carbon fiber cloth is located above the release film II, the other half blowing behind scraper of the silica gel slurry is described
Silica gel slurry is placed on above the highly-conductive hot carbon fiber cloth, and the release film I contact is located in the highly-conductive hot carbon fiber cloth
Silica gel slurry, by stack control composite heat-conducting silica gel piece overall thickness between 0.8~1.2mm, with the speed of 1m/min
Shape by die-cutting after pulling out in 140 DEG C of baking ovens, can be obtained the high-strength composite heat-conducting silica gel sheet for new energy car battery.
As a preferred embodiment of the invention, the high thermal conductive silicon film I with a thickness of 0.3~0.5mm.
As a preferred embodiment of the invention, the highly-conductive hot carbon fiber cloth with a thickness of 0.1~0.2mm.
As a preferred embodiment of the invention, the high thermal conductive silicon film II with a thickness of 0.3~0.5mm.
As a preferred embodiment of the invention, the silica gel slurry includes Silica hydrogel component A, Silica hydrogel B component
And conduction powder, the conduction powder accounting are 94~95.5%, the Silica hydrogel component A and Silica hydrogel B component accounting are
4.5%~6%, total accounting of the Silica hydrogel component A, Silica hydrogel B component and conduction powder is 100%, the Silica hydrogel A
The ratio of component and the Silica hydrogel B component is 1:1~1:1.3.
As a preferred embodiment of the invention, the manufacture craft of the silica gel slurry are as follows: first by the Silica hydrogel A
Stirring at normal temperature 30min in double planetary mixer is added in the conduction powder that component and partial size are 70~100um, and partial size is then added and is
The conduction powder of 25~35um continue stir 30min, be subsequently added into 1/2 the Silica hydrogel B component and partial size be 0.6~
The conduction powder of 1.5um stirs 30min, is eventually adding the remaining 1/2 Silica hydrogel B component, uses after stirring at normal temperature 40min
Swager extrudes, and obtains silica gel slurry.
As a preferred embodiment of the invention, the Silica hydrogel component A contains vinyl silicone oil and platinum catalysis
Agent, the Silica hydrogel B component contain vinyl silicone oil and containing hydrogen silicone oil.
As a preferred embodiment of the invention, the highly-conductive hot carbon fiber cloth sprayed using silicone treatment agent or
It is dry after person's dipping.
The beneficial effects of the present invention are:
1, compared with prior art, due to being added to high-strength carbon fiber cloth, composite heat-conducting silica gel piece thermal coefficient
It can accomplish 6w/m.k or so, (2.8~3w/m.k) improves 1 times or so on the basis of prior art；
2, material attachment is good, since intensity is higher, and has carbon cloth to support, and it is not in broken for can arbitrarily bending
Split situation；
3, high-intensitive and bendable folding endurance can be kept while high thermal conductivity is provided, and provided more to new energy car battery
Efficient heat-conducting effect.
Detailed description of the invention
Fig. 1 is that a kind of vertical crest line section structure of high-strength composite heat-conducting silica gel sheet for new energy car battery shows
It is intended to.
Specific embodiment
The high-strength composite heat-conducting silica gel sheet of new energy car battery is used for prepared by the present invention, which to lead
Hot silica gel chip architecture is that one layer of highly-conductive hot carbon fiber cloth is arranged among two layers of high thermal conductive silicon film.Conventional gap between automobile batteries
Between 0.8~1.2mm, two layers of high thermal conductive silicon 0.3~0.5mm of film stock thickness of this structure design, carbon cloth thickness 0.1
~0.2mm.Specific preparation process includes the preparation of silica gel slurry, the processing of carbon cloth and the preparation of heat-conducting silica gel sheet.
It is the preparation of silica gel slurry first, silica gel slurry includes that (such as SHIN-ETSU HANTOTAI 9212A includes vinyl silicon to Silica hydrogel component A
Oil and platinum catalyst), Silica hydrogel B component (such as SHIN-ETSU HANTOTAI 9212B, include vinyl silicone oil and containing hydrogen silicone oil), it is varigrained
Conduction powder.Conduction powder accounting is 94~95.5%, and Silica hydrogel accounting is 4.5%~6%.According to different hardness demand, silicon
Gel component A is adjusted within the scope of 1:1~1:1.3 with B component ratio.First by Silica hydrogel component A and coarse powder (partial size 70~
Stirring at normal temperature 30min in double planetary mixer 100um) is added, the powder that 25~35um of partial size is then added continues to stir
30min, is then added 1/2B component and fine powder (0.6~1.5um) stirs 30min, is eventually adding remaining B component, room temperature stirs
Mix after 40min extruded with swager it is spare.
The processing intent of highly-conductive hot carbon fiber cloth is for improving the bond strength mode between carbon cloth and silica gel piece
It is strong for improving the combination between carbon cloth and silica gel piece including dry after spraying or impregnate using silicone treatment agent
Degree.
The paying out reel up and down of tri-roll press machine is placed into release film, intermediate paying out reel places carbon cloth, silica gel slurry one
Half is discharged on lower layer's release film before scraper, and above it, the other half blowing behind scraper, slurry is placed on glass-fiber-fabric
Above glass-fiber-fabric, upper layer release film contacts silica gel, controls overall thickness between 0.8~1.2mm by stack.Then
Composite material knot shown in FIG. 1 can be obtained in shape by die-cutting after being pulled out in 140 DEG C of baking ovens (length 10m) with 1m/min speed
Structure.
Below in conjunction with specific embodiment, the present invention is further illustrated, but the scope of the present invention is not limited to these
Embodiment.
Embodiment 1
A kind of high-strength composite heat-conducting silica gel sheet for new energy car battery, in production, the control of stack gap
In 0.6mm, Silica hydrogel component A (500~1000cps of range of viscosities): B component Ratio control is in 1:1, diameter of particle and ratio control
System can prepare 0.3~0.5mm 93%~93.5% in 75u:40u:0.8u=6:4:1, powder content control, stretch strong
Degree >=0.8MPa, thermal coefficient >=4.5w/m.k silica gel piece.
Embodiment 2
A kind of high-strength composite heat-conducting silica gel sheet for new energy car battery, in production, the control of stack gap
In 0.6mm, Silica hydrogel component A (500~1000cps of range of viscosities): B component Ratio control is in 1:1, diameter of particle and ratio control
System can prepare 0.3~0.5mm 93%~93.5% in 75u:40u:1.5u=6:3:2, powder content control, stretch strong
Degree >=1.0MPa, thermal coefficient >=4w/m.k silica gel piece.
Embodiment 3
A kind of high-strength composite heat-conducting silica gel sheet for new energy car battery, in production, the control of stack gap
In 0.6mm, Silica hydrogel component A (500~1000cps of range of viscosities): B component Ratio control is in 1:1.3, diameter of particle and ratio
Control can prepare 0.3~0.5mm 93~93.5% in 75u:40u:0.8u=6:4:1, powder content control, stretch strong
Degree >=1.0Mpa, thermal coefficient >=4.5w/m.k silica gel piece.
Embodiment 4
A kind of high-strength composite heat-conducting silica gel sheet for new energy car battery, in production, the control of stack gap
In 0.6mm, Silica hydrogel component A (500~1000cps of range of viscosities): B component Ratio control is in 1:1.3, diameter of particle and ratio
Control is controlled in 100u:45u:1.5u=6:3:1, powder content 93%~93.5%, can prepare 0.3~0.5mm, is stretched
Intensity >=1.0Mpa, thermal coefficient >=5w/m.k silica gel piece.
In conclusion the high-strength composite heat-conducting silica gel sheet of the present invention for new energy car battery, is using
When release film is torn, due to intermediate carbon cloth have higher-strength, carbon cloth can be used higher up and down
The thermally conductive of coefficient leads film, and intensity can be higher, and bending is not in fragmentation, whole due to the thermally conductive reinforcing effect of carbon fiber
Thermal coefficient increases substantially, and due to heat-conducting silica gel sheet intrinsic viscosity, can fit closely with battery, excludes air thermal resistance,
Effect is much better than graphite flake.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (8)
1. a kind of high-strength composite heat-conducting silica gel sheet for new energy car battery, it is characterised in that: including five-layer structure, from
On be followed successively by release film I, high thermal conductive silicon film I, highly-conductive hot carbon fiber cloth, high thermal conductive silicon film II and release film II, institute down
The material for stating high thermal conductive silicon film I and high thermal conductive silicon film II is silica gel slurry, and preparation method is: by tri-roll press machine
Upper and lower paying out reel places the release film I and release film II respectively, and intermediate paying out reel places the highly-conductive hot carbon fiber cloth, institute
It states silica gel slurry half to be discharged to before scraper on the release film II, the highly-conductive hot carbon fiber cloth is located at the release film
Above II, the other half blowing behind scraper of the silica gel slurry, the silica gel slurry is placed on the highly-conductive hot carbon fiber cloth
Above, the release film I contact is located at the silica gel slurry in the highly-conductive hot carbon fiber cloth, controls composite heat-conducting by stack
Between 0.8 ~ 1.2mm, shape by die-cutting after being pulled out in 140 DEG C of baking ovens with the speed of 1m/min can obtain silica gel piece overall thickness
To the high-strength composite heat-conducting silica gel sheet for new energy car battery.
2. the high-strength composite heat-conducting silica gel sheet according to claim 1 for new energy car battery, it is characterised in that:
The high thermal conductive silicon film I with a thickness of 0.3 ~ 0.5mm.
3. the high-strength composite heat-conducting silica gel sheet according to claim 1 for new energy car battery, it is characterised in that:
The highly-conductive hot carbon fiber cloth with a thickness of 0.1 ~ 0.2mm.
4. the high-strength composite heat-conducting silica gel sheet according to claim 1 for new energy car battery, it is characterised in that:
The high thermal conductive silicon film II with a thickness of 0.3 ~ 0.5mm.
5. the high-strength composite heat-conducting silica gel sheet according to claim 1 for new energy car battery, it is characterised in that:
The silica gel slurry includes Silica hydrogel component A, Silica hydrogel B component and conduction powder, and the conduction powder accounting is 94 ~ 95.5%,
The Silica hydrogel component A and Silica hydrogel B component accounting are 4.5% ~ 6%, the Silica hydrogel component A, Silica hydrogel B component and conductive powder
Total accounting of body is 100%, and the ratio of the Silica hydrogel component A and the Silica hydrogel B component is 1:1 ~ 1:1.3.
6. the high-strength composite heat-conducting silica gel sheet according to claim 7 for new energy car battery, which is characterized in that
The manufacture craft of the silica gel slurry are as follows: first the conduction powder that the Silica hydrogel component A and partial size are 70 ~ 100um is added double
Stirring at normal temperature 30min in planetary mixer, then be added partial size be 25 ~ 35um conduction powder continue stir 30min, then plus
Enter the 1/2 Silica hydrogel B component and partial size and stir 30min for the conduction powder of 0.6 ~ 1.5um, is eventually adding remaining 1/2
The Silica hydrogel B component, extruded with swager after stirring at normal temperature 40min, obtain silica gel slurry.
7. the high-strength composite heat-conducting silica gel sheet according to claim 7 for new energy car battery, it is characterised in that:
The Silica hydrogel component A contains vinyl silicone oil and platinum catalyst, and the Silica hydrogel B component contains vinyl silicone oil and hydrogeneous
Silicone oil.
8. the high-strength composite heat-conducting silica gel sheet according to claim 1 for new energy car battery, it is characterised in that:
The highly-conductive hot carbon fiber cloth is dry after being sprayed or impregnated using silicone treatment agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910664395.8A CN110380156A (en) | 2019-08-08 | 2019-08-08 | A kind of high-strength composite heat-conducting silica gel sheet for new energy car battery |
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| CN201910664395.8A CN110380156A (en) | 2019-08-08 | 2019-08-08 | A kind of high-strength composite heat-conducting silica gel sheet for new energy car battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111070323A (en) * | 2019-12-20 | 2020-04-28 | 苏州高泰电子技术股份有限公司 | Ultra-soft heat-conducting silicon wafer die cutting processing technology |
| CN111690333A (en) * | 2020-06-11 | 2020-09-22 | 东莞市兆科电子材料科技有限公司 | Heat-conducting gasket and preparation method and application thereof |
| CN112778925A (en) * | 2020-12-30 | 2021-05-11 | 深圳市欧普特工业材料有限公司 | Heat-conducting silica gel sheet with composite cross laminated structure and preparation method thereof |
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| CN112778925A (en) * | 2020-12-30 | 2021-05-11 | 深圳市欧普特工业材料有限公司 | Heat-conducting silica gel sheet with composite cross laminated structure and preparation method thereof |
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