CN103212351A - Preparation and application methods of high-heat-conductivity flame retardant phase change microcapsule - Google Patents
Preparation and application methods of high-heat-conductivity flame retardant phase change microcapsule Download PDFInfo
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- CN103212351A CN103212351A CN2013101205771A CN201310120577A CN103212351A CN 103212351 A CN103212351 A CN 103212351A CN 2013101205771 A CN2013101205771 A CN 2013101205771A CN 201310120577 A CN201310120577 A CN 201310120577A CN 103212351 A CN103212351 A CN 103212351A
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Abstract
The invention discloses preparation and application methods of a high-heat-conductivity flame retardant phase change microcapsule. The preparation method comprises the following steps of: heating the phase change material to above melting point; adding a flame retardant, a high-heat-conductivity material and a monomer; after emulsification, filling nitrogen in a reaction kettle; and dropwise adding a water soluble initiator, and reacting for a period of time to obtain the high-heat-conductivity flame retardant phase change microcapsule. The application method comprises the following steps of: filling the high-heat-conductivity flame retardant microcapsule in the middle of monomer cell and packaging by a module frame; packaging a battery module in a battery box; and coating the high-heat-conductivity flame retardant phase change microcapsule onto the inner side of the battery box. The high-heat-conductivity flame retardant phase change microcapsule provided by the invention is high in phase change heat, high in heat conductivity and high in flame retardancy.
Description
Technical field
The present invention relates to the electric vehicle engineering field, relate in particular to a kind of preparation and application process of high heat conductive flame-retarding phase-change microcapsule.
Background technology
Along with developing rapidly of whole world industry, problem of environmental pollution highlights day by day.Especially in recent years China brings inconvenience also for our trip, even causes traffic accident, threat to life because the haze sky that air pollution causes is damaging the able-bodied while of the whole people.Analyze through the relevant expert, the main cause that causes the haze sky is exactly an emission of automobile wastes.At present the gasoline car that uses is when consuming global only petroleum resources, caused very for our environment and seriously influences, and trampleing on descendants's living environment.So the development new-energy automobile replaces traditional fuel vehicle extremely urgent.Electric automobile is exactly to arise at the historic moment under such an enviroment.
At present, electric automobile is all being greatly developed in countries in the world, yet is not but accepted by most of people.A major reason is exactly the security that people are difficult to trust electric automobile, and several the security incidents of Fa Shenging made people forbidding especially to electric motor car in recent years.How to allow people drive relieved electric automobile and become a current hot issue.
The core of electric automobile is an electrokinetic cell, and the heat management of carrying out electrokinetic cell system is for fundamental influence is arranged in service life of the full security of electric automobile and electrokinetic cell.Electrokinetic cell need its performance just can better be brought into play under moderate relatively and warm uniform relatively situation of a temperature, especially for comparatively popular lithium titanate anode system electrokinetic cell and ternary material system electrokinetic cell, the operating temperature of control electrokinetic cell is particularly important.Traditional electrokinetic cell heat management is the type of cooling that adopts air-cooled and liquid cooling.Air-cooled equipment is slightly simple, but interior circulation cooling effect is limited, and can only play the shimming effect substantially.And outer circulation is difficult to reach the requirement of shelter of IP67, at the environment of humidity and use the danger that has electric leakage rainy day.The cooling effect of liquid cooling is better, but the equipment complexity in the time of consume battery power, has also reduced energy density.Air-cooled and liquid cooling or cooling effect are limited, or the structure bulky complex, and the most important thing is to fail rationally to utilize the heat of electrokinetic cell, do not reach the effect of energy-saving and emission-reduction.In recent years, the phase-change material cooling becomes a kind of novel type of cooling, in the heat that in time the storage electrokinetic cell distributes, can discharge the heat of storage at low temperatures, place it in the middle of the electric core and box inside, just as a small-sized air conditioner being installed for each electric core.Guarantee the uniformity of electric core temperature, solved heat management problems simultaneously.
Adopt phase-change material that the research that electrokinetic cell system carries out heat management is had some reports, phase-change material is placed in the middle of monomer electricity core and the housing, be aided with heater electrokinetic cell is carried out heat management as patent CN201699090U.But the heat conduction of not mentioned used phase-change material and anti-flammability.BYD company proposes the method that a kind of preparation has the power brick of temp regulating function, and the phase-change material of its use mainly is about about the 60 ℃ mineral wax of phase transition temperature, also has organic matters such as polyalcohol in addition, but does not add highly heat-conductive material.Two companies of stepping on have applied for a kind of patent of filling the heat dissipating method of phase-change material in the lithium battery interior gap.For improving heat conductivility, added metallic aluminium and material with carbon element in the organic phase change material (paraffin or stearic acid list glyceride), but the anti-flammability of not mentioned phase-change material.
Summary of the invention
The technical problem that the present invention solves is to improve how simultaneously the heat of transformation, high-termal conductivity and anti-flammability.
The embodiment of the invention discloses a kind of preparation method of high heat conductive flame-retarding phase-change microcapsule, may further comprise the steps:
1.1, phase-change material is heated to more than the fusing point;
1.2, add fire retardant, highly heat-conductive material and monomer;
1.3, after the emulsification, charge into nitrogen in the reactor;
1.4, drip water soluble starter, through obtaining high heat conductive flame-retarding phase-change microcapsule after one period reaction time.
Further, as preferably, described phase-change material is the mixture of the different various alkane of phase transformation paraffin or fusing point.
Further, as preferably, described fire retardant is a chlorinated paraffin wax.
Further, as preferably, described highly heat-conductive material is the silica dioxide granule of surperficial oleophylic, and promptly the surface is through long chain alkane one type of silane coupling agent, and as the octadecyl trimethoxy silane, the silica dioxide granule after the modification, particle diameter are from 20 nanometers～1 micron.
Further, as preferably, described monomer is styrene and/or divinylbenzene and/or butyl acrylate and/or GDMA and/or methyl acrylate.
Further, as preferably, described water soluble starter is potassium peroxydisulfate or ammonium persulfate or potassium peroxydisulfate-sodium hydrogensulfite initator.
Further, as preferably, the described reaction time is 4-12h.
The invention also discloses a kind of using method of high heat conductive flame-retarding phase-change microcapsule, may further comprise the steps:
8.1, high heat conductive flame-retarding microcapsules are filled in the centre of monomer electricity core, encapsulate with module framework;
8.2, battery modules is encapsulated in the battery case;
8.3, coat high heat conductive flame-retarding phase-change microcapsule in the battery case inboard.
The present invention except having the higher heat of transformation, also has high-termal conductivity and anti-flammability for the phase-change material that is applied in the electrokinetic cell system heat management.Designed a kind of thermal management algorithm of electrokinetic cell system efficiently simultaneously.
Description of drawings
When considered in conjunction with the accompanying drawings, by the reference following detailed, can more completely understand the present invention better and learn wherein many attendant advantages easily, but accompanying drawing described herein is used to provide further understanding of the present invention, constitute a part of the present invention, illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute to improper qualification of the present invention, wherein:
Fig. 1 is the stereoscan photograph of high heat conductive flame-retarding phase-change microcapsule.
The specific embodiment
With reference to Fig. 1 embodiments of the invention are described.
For above-mentioned purpose, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Employed experimental technique is conventional method if no special instructions among the following embodiment.
Used material, reagent etc. if no special instructions, all can obtain from commercial channels among the following embodiment.
Embodiment 1
With 10 parts of fusing points is 25 ℃ of heating paraffin to 50 ℃, 0.5 part of the silica dioxide granule that adds surperficial oleophylic, add 0.5 part of chlorinated paraffin wax, the mixture of 3 parts of styrene and divinylbenzene, the aqueous solution of 84 parts of emulsifying agents adds in the reactor after the emulsification, be warming up to 70 ℃, feed nitrogen, drip that 2 parts of potassium peroxydisulfates--the aqueous solution of sodium hydrogensulfite dropwises about 1h.Behind the reaction 10h, finish reaction.Can obtain high heat conductive flame-retarding phase-change microcapsule behind the centrifugal drying.
The high heat conductive flame-retarding phase-change microcapsule of 500g is added in the battery modules of LiFePO4 system, every group of module is made up of 5 monomers electricity cores, and totally two groups of modules are in the slit of high heat conductive flame-retarding phase-change microcapsule between electric core.Module is encapsulated in the battery case, and the battery case inwall scribbles high heat conductive flame-retarding phase-change microcapsule.Adopt the multiplying power of 2C that the electrokinetic cell module is discharged, monitor the variations in temperature of electric wicking surface.The mean temperature of electric core rises to 25 ℃ by 20 ℃ before and after the test, and the temperature difference of electric core is in 2 ℃.
The electrokinetic cell system that does not add high heat conductive flame-retarding phase-change microcapsule is repeated above-mentioned test, and the mean temperature of electric core had 20 ℃ to rise to 41 ℃ before and after the result tested, and the maximum temperature difference of electric core is 10 ℃.
Above result shows, add low 16 ℃ that the electrokinetic cell system temperature rise of high heat conductive flame-retarding phase-change microcapsule does not more add, and electric core has a narrow range of temperature 8 ℃.This high-efficiency heat pipe reason method is not fully exerted battery performance, for safety in utilization provides guarantee.
Though more than described the specific embodiment of the present invention, but those skilled in the art is to be understood that, these specific embodiment only illustrate, those skilled in the art can carry out various omissions, replacement and change to the details of said method and system under the situation that does not break away from principle of the present invention and essence.For example, merge the said method step, then belong to scope of the present invention to realize the identical result of essence thereby carry out the essence identical functions according to the identical method of essence.Therefore, scope of the present invention is only limited by appended claims.
Claims (8)
1. the preparation method of a high heat conductive flame-retarding phase-change microcapsule is characterized in that, may further comprise the steps:
1.1, phase-change material is heated to more than the fusing point;
1.2, add fire retardant, highly heat-conductive material and monomer;
1.3, after the emulsification, charge into nitrogen in the reactor;
1.4, drip water soluble starter, through obtaining high heat conductive flame-retarding phase-change microcapsule after one period reaction time.
2. according to the preparation method of the described high heat conductive flame-retarding phase-change microcapsule of claim 1, it is characterized in that described phase-change material is the mixture of the different various alkane of phase transformation paraffin or fusing point.
3. according to the preparation method of the described high heat conductive flame-retarding phase-change microcapsule of claim 1, it is characterized in that described fire retardant is a chlorinated paraffin wax.
4. according to the preparation method of the described high heat conductive flame-retarding phase-change microcapsule of claim 1, it is characterized in that described highly heat-conductive material is the silica dioxide granule of surperficial oleophylic.
5. according to the preparation method of the described high heat conductive flame-retarding phase-change microcapsule of claim 1, it is characterized in that described monomer is styrene and/or divinylbenzene and/or butyl acrylate and/or GDMA and/or methyl acrylate.
6. according to the preparation method of the described high heat conductive flame-retarding phase-change microcapsule of claim 1, it is characterized in that described water soluble starter is potassium peroxydisulfate or ammonium persulfate or potassium peroxydisulfate-sodium hydrogensulfite initator.
7. according to the preparation method of the described high heat conductive flame-retarding phase-change microcapsule of claim 1, it is characterized in that the described reaction time is 4-12h.
8. the application process of a high heat conductive flame-retarding phase-change microcapsule is characterized in that, may further comprise the steps:
8.1, any described high heat conductive flame-retarding microcapsules of claim 1 to 7 are filled in the centre of monomer electricity core, encapsulate with module framework;
8.2, battery modules is encapsulated in the battery case;
8.3, coat high heat conductive flame-retarding phase-change microcapsule in the battery case inboard.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464067A (en) * | 2013-08-07 | 2013-12-25 | 苏州伟纳节能科技有限公司 | Assembly line apparatus for preparing phase change energy storage microcapsules |
| CN103740337A (en) * | 2014-01-10 | 2014-04-23 | 江苏丰彩新型建材有限公司 | Novel shaped phase-change material and preparation method thereof |
| CN103805142A (en) * | 2013-12-30 | 2014-05-21 | 清华大学深圳研究生院 | Silicon nitride-modified phase-change and energy-storage microcapsule and preparation method thereof |
| CN104212416A (en) * | 2014-08-30 | 2014-12-17 | 海安南京大学高新技术研究院 | Preparation method for paraffin microcapsule phase-change material modified by graphene oxide |
| CN105112020A (en) * | 2015-06-11 | 2015-12-02 | 宁波绿凯节能科技有限公司 | Flame-retardant microcapsule phase-change material |
| CN105355824A (en) * | 2015-12-11 | 2016-02-24 | 北京新能源汽车股份有限公司 | Power battery diaphragm and preparation method thereof as well as power battery comprising power battery diaphragm |
| CN105542721A (en) * | 2015-12-08 | 2016-05-04 | 北京新能源汽车股份有限公司 | Flame retardant phase change microcapsule and its preparation method and use |
| CN105895959A (en) * | 2014-11-24 | 2016-08-24 | 深圳市沃特玛电池有限公司 | Method for improving needling safety performance of lithium ion battery |
| CN105969315A (en) * | 2016-04-22 | 2016-09-28 | 江苏楚汉新能源科技有限公司 | Phase change thermal conducting material for lithium ion battery and preparation method thereof |
| CN106469794A (en) * | 2015-08-20 | 2017-03-01 | 江苏海四达电源股份有限公司 | A kind of method of high specific energy batteries bag internal ignition resistant cooling |
| CN111154459A (en) * | 2020-01-20 | 2020-05-15 | 河北工业大学 | Organic-inorganic hybrid shell phase change capsule and preparation method thereof |
| CN115093832A (en) * | 2022-06-09 | 2022-09-23 | 武汉中科先进材料科技有限公司 | Preparation method of environment-friendly heat-insulation temperature-control flame-retardant material |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464067B (en) * | 2013-08-07 | 2015-08-05 | 苏州伟纳节能科技有限公司 | A kind of flow-line equipment preparing phase-changing energy-storing microcapsules |
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| CN103805142B (en) * | 2013-12-30 | 2016-11-16 | 清华大学深圳研究生院 | A kind of silicon nitride modification microcapsules of storing energy through phase change and preparation method thereof |
| CN103805142A (en) * | 2013-12-30 | 2014-05-21 | 清华大学深圳研究生院 | Silicon nitride-modified phase-change and energy-storage microcapsule and preparation method thereof |
| CN103740337A (en) * | 2014-01-10 | 2014-04-23 | 江苏丰彩新型建材有限公司 | Novel shaped phase-change material and preparation method thereof |
| CN103740337B (en) * | 2014-01-10 | 2016-04-06 | 江苏丰彩新型建材有限公司 | A kind of novel sizing phase-change material and preparation method thereof |
| CN104212416A (en) * | 2014-08-30 | 2014-12-17 | 海安南京大学高新技术研究院 | Preparation method for paraffin microcapsule phase-change material modified by graphene oxide |
| CN104212416B (en) * | 2014-08-30 | 2017-04-12 | 海安南京大学高新技术研究院 | Preparation method for paraffin microcapsule phase-change material modified by graphene oxide |
| CN105895959A (en) * | 2014-11-24 | 2016-08-24 | 深圳市沃特玛电池有限公司 | Method for improving needling safety performance of lithium ion battery |
| CN105112020A (en) * | 2015-06-11 | 2015-12-02 | 宁波绿凯节能科技有限公司 | Flame-retardant microcapsule phase-change material |
| CN106469794A (en) * | 2015-08-20 | 2017-03-01 | 江苏海四达电源股份有限公司 | A kind of method of high specific energy batteries bag internal ignition resistant cooling |
| CN106469794B (en) * | 2015-08-20 | 2019-10-15 | 江苏海四达电源股份有限公司 | A kind of method of high specific energy batteries packet internal ignition resistant cooling |
| CN105542721A (en) * | 2015-12-08 | 2016-05-04 | 北京新能源汽车股份有限公司 | Flame retardant phase change microcapsule and its preparation method and use |
| CN105355824A (en) * | 2015-12-11 | 2016-02-24 | 北京新能源汽车股份有限公司 | Power battery diaphragm and preparation method thereof as well as power battery comprising power battery diaphragm |
| CN105355824B (en) * | 2015-12-11 | 2018-07-06 | 北京新能源汽车股份有限公司 | Power battery diaphragm, preparation method and include its power battery |
| CN105969315A (en) * | 2016-04-22 | 2016-09-28 | 江苏楚汉新能源科技有限公司 | Phase change thermal conducting material for lithium ion battery and preparation method thereof |
| CN111154459A (en) * | 2020-01-20 | 2020-05-15 | 河北工业大学 | Organic-inorganic hybrid shell phase change capsule and preparation method thereof |
| CN111154459B (en) * | 2020-01-20 | 2021-03-19 | 河北工业大学 | Organic-inorganic hybrid shell phase change capsule and preparation method thereof |
| CN115093832A (en) * | 2022-06-09 | 2022-09-23 | 武汉中科先进材料科技有限公司 | Preparation method of environment-friendly heat-insulation temperature-control flame-retardant material |
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Address after: 102606 Beijing City Economic Development Zone, Daxing District Caiyu mining and Road No. 1 Patentee after: Beijing new-energy automobile Company Limited by Shares Address before: 102606 Beijing City Economic Development Zone, Daxing District Caiyu mining and Road No. 1 Patentee before: Beijing Auto New Energy Auto Co., Ltd. |