CN110364648B - New energy lithium battery radiating gasket and preparation method thereof - Google Patents
New energy lithium battery radiating gasket and preparation method thereof Download PDFInfo
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- CN110364648B CN110364648B CN201810321991.1A CN201810321991A CN110364648B CN 110364648 B CN110364648 B CN 110364648B CN 201810321991 A CN201810321991 A CN 201810321991A CN 110364648 B CN110364648 B CN 110364648B
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- silicone oil
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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
- H01M10/65—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
- H01M10/6554—Rods or plates
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/50—Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature
- H01M6/5038—Heating or cooling of cells or batteries
-
- 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
- H05K7/20509—Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures
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- 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 invention discloses a new energy lithium battery radiating gasket and a preparation method thereof, wherein the new energy lithium battery radiating gasket comprises the following steps: stirring the divinyl-terminated polydimethylsiloxane and the methyl silicone oil in a high-speed power mixer in vacuum for 10-25 minutes to obtain a uniformly mixed material; respectively adding heat-conducting powder with different particle sizes and uniformly stirring; after being stirred uniformly, hydrogen-containing silicone oil, retarder and platinum catalyst are respectively added; after being uniformly mixed, the prepared silica gel skin and the high-temperature-resistant insulating PI film substrate are added through a special calendering line; and (3) putting the carrier filled with the mixed material into an oven, curing for 8-15 minutes at the temperature of 90-120 ℃, and preparing the radiating gasket by an addition forming method. The lithium battery radiating gasket has excellent rebound resilience, ensures that air on a heat conducting interface is completely extruded, has strong tear resistance, reduces thermal resistance to the maximum extent, plays roles of insulation, shock absorption, sealing, noise reduction and the like, and can meet the design requirements of equipment miniaturization and ultrathin.
Description
Technical Field
The invention relates to the technical field of heat conduction materials, in particular to a new energy lithium battery radiating gasket.
Background
The heat-conducting silica gel sheet is a heat-conducting medium composite material with silica gel as a base material, and is also called a heat-conducting silica gel pad, a heat-conducting silica gel sheet, a soft heat-conducting pad and the like. Silica gel piece has obtained wide application in the electronic equipment field as heat conduction material, and it has certain pliability, good insulating nature, compressibility, the natural viscidity in surface, and there is certain difference in the preparation production flow of its heat conduction silica gel piece of different producers: the heat conducting silica gel sheet is prepared with organic silica gel as material and through the technological process including: raw material preparation → plastication → mixing → molding vulcanization → shaping cutting → inspection and the like. Wherein, the plastication and mixing process plays an important role in the synthesis of materials.
The prior art CN 103342896A discloses a high-temperature-resistant heat-conducting silica gel sheet and a preparation method thereof, and is characterized in that the high-temperature-resistant heat-conducting silica gel sheet comprises the following components in percentage by weight: 50-80 parts of vinyl-terminated polydimethylsiloxane, 20-50 parts of vinyl-terminated methyl phenyl silicone oil, 0.3-10 parts of hydrogen-containing silicone oil, 2-6 parts of platinum catalyst, 0.2-0.6 part of retarder, 5-100 parts of heat-resistant additive and heat-conducting powder: 400-1200 parts. The preparation method comprises the following steps: uniformly mixing vinyl-terminated polydimethylsiloxane and vinyl-terminated methylphenyl silicone oil in a kneader; adding the treated or untreated heat-conducting powder and the heat-resisting additive in batches, and adding hydrogen-containing silicone oil, a retarder and a catalyst after uniformly mixing; mixed well and thermally cured in a forming machine into a sheet. The heat-resistant silica gel sheet provided by the invention can still have good usability after being aged at 250 ℃ for 1000h, namely the hardness and the heat conductivity coefficient change are within acceptable ranges.
Furthermore, prior art CN 103113846B discloses a heat conductive silica gel sheet and a preparation method thereof, wherein the heat conductive silica gel sheet is prepared from polysiloxane, heat conductive powder, a surface modifier, a cross-linking agent, a platinum catalyst, and a retarder according to the ratio of 10-50: 20-600: 0.1-5: 0.2-2: 0.01-1: 0.0001-0.01 weight parts of a sheet-like body obtained by mixing and molding. The preparation method comprises the following steps: a. sequentially adding polysiloxane, a cross-linking agent, a surface modifier, heat-conducting powder, a platinum catalyst and a retarder into a reaction kettle according to a proportion, and stirring for 30-50 minutes to obtain a mixed material; b. pouring the mixed material into a frame-shaped mould, and scraping the upper surface; c. and (3) putting the mould filled with the mixed material into an oven, curing for 5-20 minutes at the temperature of 80-150 ℃, and forming to obtain the heat-conducting silica gel sheet with the preset thickness and one sticky surface and the other non-sticky surface. The invention can lead the heat-conducting silica gel sheet to have the characteristic of single-sided viscosity without secondary procedure treatment, and simultaneously, the one-step forming process ensures the uniformity of the process treatment.
Disclosure of Invention
The design purpose of the invention is as follows: aiming at the technical situation of the existing heat-conducting silica gel sheet product in the field, a new energy lithium battery heat dissipation gasket and a preparation method thereof are provided after research and design, and the heat dissipation gasket can increase the tear resistance and improve the heat conducting property.
In order to achieve the purpose, the invention adopts the following technical scheme: a preparation method of a new energy lithium battery radiating gasket comprises the following steps:
step S1: stirring the divinyl-terminated polydimethylsiloxane and the methyl silicone oil in a high-speed power mixer in vacuum for 10-25 minutes to obtain a uniformly mixed material;
step S2: respectively adding heat-conducting powder with different particle sizes and uniformly stirring;
step S3: after being stirred uniformly, hydrogen-containing silicone oil, retarder and platinum catalyst are respectively added;
step S4: after being uniformly mixed, the prepared silica gel skin and the high-temperature-resistant insulating PI film substrate are added through a special calendering line;
step S5: and (3) putting the carrier filled with the mixed material into an oven, curing for 8-15 minutes at the temperature of 90-120 ℃, and preparing the radiating gasket by an addition forming method.
Wherein, the heat conducting powder in the step S2 is one or a combination of micron-sized alumina, micron-sized silica powder, nanometer-sized alumina and nanometer-sized nitride, and the retarder is one of alkynylcyclohexanol or alkynol compounds.
According to the method, the new energy lithium battery radiating gasket comprises a gasket body, wherein the gasket body is prepared by kneading a divinyl-terminated polydimethylsiloxane, methyl silicone oil, hydrogen-containing silicone oil, a retarder, a platinum catalyst and heat-conducting powder according to the weight ratio of 62-115: 27-49: 5:1: 13-15: 819-892 and mixing silica gel skin and high-temperature-resistant insulating PI film base material micron-sized particles according to the weight ratio of 2-5.
Further, the viscosity range of the divinyl-terminated polydimethylsiloxane is 180-220 mPa & s.
Further, the heat-conducting powder is one or a combination of more of aluminum oxide, silicon dioxide, zinc oxide, magnesium oxide, aluminum nitride, silicon nitride, boron nitride, silicon carbide and micron-sized silicon micro powder, and the particle size of the heat-conducting powder is 0.1-80 μm.
Further, the retarder is one of alkynylcyclohexanol or alkynol compounds.
The new energy lithium battery radiating gasket and the preparation method thereof have the following beneficial effects:
1. the lithium battery radiating gasket has excellent rebound resilience, ensures that air on a heat conducting interface is completely extruded, has strong tear resistance, reduces thermal resistance to the maximum extent, plays roles of insulation, shock absorption, sealing, noise reduction and the like, and can meet the design requirements of equipment miniaturization and ultrathin;
2. the lithium battery radiating gasket has the advantages of good processing performance, no adhesion of a sealing surface, easy disassembly, low price and long service life, and can be widely applied to the bottom or the frame of a radiator, a high-speed hard disk drive, an RDRAM (remote data random access memory) memory module, a micro heat pipe radiator, an automobile engine control device, a portable electronic device of communication hardware, automatic semiconductor test equipment and the like.
Detailed Description
The technical solution of the present invention will be clearly and completely described in the following embodiments.
Example 1:
stirring 62 parts by weight of divinyl-terminated polydimethylsiloxane with the viscosity of 180mPa & s and 27 parts by weight of methyl silicone oil in a high-speed power mixer in vacuum for 10 minutes to obtain a uniformly mixed material; respectively adding 850 parts by weight of heat-conducting powder which is formed by mixing alumina and magnesia and has the grain diameter of about 5 mu m, and uniformly stirring; after stirring uniformly, respectively adding 5 parts by weight of hydrogen-containing silicone oil, 1 part by weight of retarder alkynyl cyclohexanol and 13 parts by weight of platinum catalyst; after being uniformly mixed, the prepared silica gel skin and the micron-sized particles of the high-temperature-resistant insulating PI film substrate are added through a special calendering line; and (3) putting the carrier filled with the mixed material into an oven, curing for 8-15 minutes at the temperature of 90-120 ℃, and preparing the radiating gasket by an addition forming method.
Example 2:
stirring 115 parts by weight of divinyl-terminated polydimethylsiloxane with the viscosity of 200mPa & s and 48 parts by weight of methyl silicone oil in a high-speed power mixer in vacuum for 12 minutes to obtain a uniformly mixed material; respectively adding 850 parts by weight of heat-conducting powder which is formed by mixing silicon nitride, boron nitride and silicon carbide and has the grain diameter of about 60 mu m, and uniformly stirring; after stirring uniformly, respectively adding 5 parts by weight of hydrogen-containing silicone oil, 1 part by weight of retarder alkynyl cyclohexanol and 15 parts by weight of platinum catalyst; after being uniformly mixed, the prepared silica gel skin and the micron-sized particles of the high-temperature-resistant insulating PI film substrate are added through a special calendering line; and (3) putting the carrier filled with the mixed material into an oven, curing for 8-15 minutes at the temperature of 90-120 ℃, and preparing the radiating gasket by an addition forming method.
Example 3:
stirring 90 parts by weight of divinyl-terminated polydimethylsiloxane with the viscosity of 195mPa & s and 27 parts by weight of methyl silicone oil in a high-speed power mixer in vacuum for 22 minutes to obtain a uniformly mixed material; respectively adding 820 parts by weight of heat-conducting powder which is formed by mixing magnesium oxide, aluminum nitride and silicon nitride and has the particle size of about 50 mu m, and uniformly stirring; after stirring uniformly, respectively adding 5 parts by weight of hydrogen-containing silicone oil, 1 part by weight of retarder butynol and 14 parts by weight of platinum catalyst; after being uniformly mixed, the prepared silica gel skin and the micron-sized particles of the high-temperature-resistant insulating PI film substrate are added through a special calendering line; and (3) putting the carrier filled with the mixed material into an oven, curing for 8-15 minutes at the temperature of 90-120 ℃, and preparing the radiating gasket by an addition forming method.
Comparative example: (examples of conventional Heat-conductive pad preparation)
Adding 50 parts by weight of polysiloxane with 500 mPas side chain vinyl into a reaction kettle, and then sequentially adding 1.8 parts by weight of methyl hydrogen-containing polysiloxane, 150 parts by weight of aluminum powder with the particle size of 15 microns, 100 parts by weight of aluminum powder with the particle size of 4 microns, 0.3 part by weight of platinum catalyst and 0.005 part of butynol retarder to obtain a uniformly mixed material. And placing the mixed material into a 2mm deep frame type die, and scraping the redundant rubber material out by using a scraper after leveling. The glue and the mold were then placed in an oven and cured at 120 ℃ for 10 minutes to obtain a 2mm thick comparative heat sink sample.
Comparative data for test performance for examples 1-3 and comparative examples are shown in Table 1:
TABLE 1
As can be seen from table 1, in the case of comparison with the heat dissipation pads having the same thickness, the tear resistance and the thermal conductivity of the heat dissipation pads of examples 1 to 3 are superior to those of the heat dissipation pad of the comparative example. The scheme of the invention can increase the tearing strength of the radiating gasket and improve the heat conducting property of the radiating gasket.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the above embodiments, and various changes, modifications, substitutions and alterations can be made without departing from the spirit of the invention within the knowledge of those skilled in the art, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims (3)
1. The utility model provides a new forms of energy lithium cell radiating gasket, includes the gasket body, its characterized in that: the gasket body is prepared by kneading divinyl-terminated polydimethylsiloxane, methyl silicone oil, hydrogen-containing silicone oil, a retarder, a platinum catalyst and heat-conducting powder according to the weight ratio of 62-115: 27-49: 5:1: 13-15: 819-892, and then mixing silica gel skin and high-temperature-resistant insulating PI film substrate micron-sized particles according to the weight ratio of 2-5, wherein the heat-conducting powder is one or a combination of more of aluminum oxide, silicon dioxide, zinc oxide, magnesium oxide, aluminum nitride, silicon nitride, boron nitride, silicon carbide and micron-sized silicon micro powder, and the particle size of the heat-conducting powder is 0.1-80 mu m;
the new energy lithium battery radiating gasket is prepared by the following steps:
step S1: stirring the divinyl-terminated polydimethylsiloxane and the methyl silicone oil in a high-speed power mixer for 10-25 minutes in vacuum to obtain a uniformly mixed material,
step S2: adding heat-conducting powder with different grain diameters respectively, stirring uniformly,
step S3: after being stirred evenly, the hydrogen-containing silicone oil, the retarder and the platinum catalyst are respectively added,
step S4: after being mixed evenly, the prepared silica gel skin and the micron-sized particles of the high-temperature-resistant insulating PI film base material are added through a calendering line,
step S5: and (3) putting the carrier filled with the mixed material into an oven, curing for 8-15 minutes at the temperature of 90-120 ℃, and preparing the radiating gasket by an addition forming method.
2. The new energy lithium battery heat sink gasket of claim 1, wherein: the viscosity range of the divinyl end-capped polydimethylsiloxane is 180-220 mPa & s.
3. The new energy lithium battery heat sink gasket of claim 1, wherein: the retarder is one of alkynylcyclohexanol or alkynol compounds.
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| CN201810321991.1A CN110364648B (en) | 2018-04-11 | 2018-04-11 | New energy lithium battery radiating gasket and preparation method thereof |
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| CN113871112B (en) * | 2021-09-17 | 2023-12-08 | 惠州东铭新能源材料股份有限公司 | Production process of top insulating sheet of battery module |
| CN115286832B (en) * | 2022-09-03 | 2023-04-04 | 东莞市零度导热材料有限公司 | Heat-conducting silica gel sheet applied to new energy automobile and preparation method thereof |
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| CN103333502A (en) * | 2013-06-26 | 2013-10-02 | 苏州天脉导热科技有限公司 | Ultrathin heat conductive silicon sheet and preparation method thereof |
| CN103436018A (en) * | 2013-08-23 | 2013-12-11 | 深圳市鸿富诚屏蔽材料有限公司 | High-toughness ultrathin heat-conducting silica gel gasket and preparation method thereof |
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| CN102002346B (en) * | 2010-10-15 | 2013-01-30 | 深圳市安品有机硅材料有限公司 | Organic silicon heat conduction composition and organic silicon heat conduction patch |
| DE102011081149A1 (en) * | 2011-08-17 | 2013-02-21 | Sgl Carbon Se | Heat sink and electrical energy storage |
| CN102602076B (en) * | 2012-03-01 | 2015-03-11 | 昆山市中迪新材料技术有限公司 | Heat conductive insulation sheet and structural adhesive |
| CN102924927B (en) * | 2012-11-22 | 2014-03-12 | 深圳市森日有机硅材料有限公司 | Full-transparent liquid silicone rubber composition and preparation method thereof |
| CN104448836A (en) * | 2014-11-24 | 2015-03-25 | 深圳德邦界面材料有限公司 | Puncture-resistant type heat radiation silica gel pad and preparation method thereof |
| CN104788968B (en) * | 2015-04-21 | 2018-08-03 | 深圳市安品有机硅材料有限公司 | Organosilicon heat conductive isolation sheet and preparation method thereof |
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| CN103333502A (en) * | 2013-06-26 | 2013-10-02 | 苏州天脉导热科技有限公司 | Ultrathin heat conductive silicon sheet and preparation method thereof |
| CN103436018A (en) * | 2013-08-23 | 2013-12-11 | 深圳市鸿富诚屏蔽材料有限公司 | High-toughness ultrathin heat-conducting silica gel gasket and preparation method thereof |
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