CN116496762A - Composite phase change material, preparation method and battery thermal management system - Google Patents
Composite phase change material, preparation method and battery thermal management system Download PDFInfo
- Publication number
- CN116496762A CN116496762A CN202310460200.4A CN202310460200A CN116496762A CN 116496762 A CN116496762 A CN 116496762A CN 202310460200 A CN202310460200 A CN 202310460200A CN 116496762 A CN116496762 A CN 116496762A
- Authority
- CN
- China
- Prior art keywords
- change material
- phase change
- graphene oxide
- matrix
- composite phase
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 239000012782 phase change material Substances 0.000 title claims abstract description 156
- 239000002131 composite material Substances 0.000 title claims abstract description 106
- 238000002360 preparation method Methods 0.000 title abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 140
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 138
- 230000002829 reductive effect Effects 0.000 claims abstract description 86
- 239000011159 matrix material Substances 0.000 claims abstract description 83
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000012188 paraffin wax Substances 0.000 claims description 85
- 229920000877 Melamine resin Polymers 0.000 claims description 52
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical group NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 52
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical group I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims description 21
- 229940071870 hydroiodic acid Drugs 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 239000003638 chemical reducing agent Substances 0.000 claims description 14
- 238000002791 soaking Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- 238000011049 filling Methods 0.000 claims description 13
- 238000005119 centrifugation Methods 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 7
- 238000006722 reduction reaction Methods 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 9
- 230000004048 modification Effects 0.000 abstract description 6
- 238000012986 modification Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 37
- 230000008859 change Effects 0.000 description 22
- 238000004321 preservation Methods 0.000 description 11
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 239000006260 foam Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 150000007974 melamines Chemical class 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002329 infrared spectrum Methods 0.000 description 4
- 229940057995 liquid paraffin Drugs 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 238000005382 thermal cycling Methods 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical group C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 125000004093 cyano group Chemical group *C#N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000001841 imino group Chemical group [H]N=* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage 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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention provides a composite phase change material, a preparation method and a battery thermal management system. The composite phase change material comprises: a substrate having a porous structure; the reduced graphene oxide layer is coated on the framework of the matrix; and the phase change material is filled in the holes of the matrix. According to the preparation method, the composite material has good heat insulation performance and thermal cycle stability through the coating modification of the reduced graphene oxide with high heat conduction and high thermodynamic stability, and the reduced graphene oxide layer forms folds on the framework of the matrix, so that the framework of the matrix is formed into a rough surface, and the reduced graphene oxide has better affinity to the phase change material, so that the matrix has stronger capillary action and molecular acting force, and the adsorption capacity to the phase change material filled in the holes of the matrix is enhanced, so that the leakage of the phase change material is effectively prevented.
Description
Technical Field
The invention relates to the technical field of phase change materials, in particular to a composite phase change material, a preparation method and a battery thermal management system.
Background
Power batteries, particularly lithium ion batteries, are the primary source of electricity for electric vehicles. However, the lithium ion battery is sensitive to temperature, the optimal temperature working range is 20-55 ℃, and the working performance of the battery can be seriously affected by too high or too low temperature, so that potential safety hazards are brought. And is therefore critical to the thermal management of the battery to ensure that the battery operates under proper conditions.
The phase change material can absorb or release latent heat in the phase change process, so that heat exchange with the outside occurs in a constant temperature or approximately constant temperature mode, and the phase change material is widely applied to heat management of batteries as a passive heat management technology. The traditional phase change material is mostly formed by compounding foam metal or expanded graphite with the phase change material, and has the problems of poor heat preservation effect, low strength, easy leakage of the phase change material and the like, so that a thermal management system is invalid, and the safety of a battery in the use process is seriously influenced.
Disclosure of Invention
The invention aims to provide a composite phase change material, a preparation method and a battery thermal management system, wherein the thermal insulation material has good thermal insulation performance and stability.
In order to solve the technical problems, the application adopts the following technical scheme:
the application proposes a composite phase change material comprising: a substrate having a porous structure; the reduced graphene oxide layer is coated on the framework of the matrix; and the phase change material is filled in the holes of the matrix.
According to some embodiments of the present application, the reduced graphene oxide layer is discontinuously distributed on the scaffold.
According to some embodiments of the application, the matrix is melamine sponge.
According to some embodiments of the application, the phase change material comprises paraffin wax.
The application also provides a preparation method of the composite phase change material, which comprises the following steps:
soaking a matrix in a graphene oxide solution, and centrifuging after full soaking to obtain a matrix adsorbed with graphene oxide;
chemically reducing the matrix adsorbed with the graphene oxide by using a reducing agent, and then washing and drying sequentially to obtain a matrix containing a reduced graphene oxide layer;
and filling the phase change material into the holes of the matrix containing the reduced graphene oxide layer to obtain the composite phase change material.
According to some embodiments of the application, the concentration of the graphene oxide solution is 2mg/mL to 10mg/mL.
According to some embodiments of the present application, the rotational speed of the centrifugation is 1500r/min to 1900r/min, and the time of the centrifugation is 1min to 4min.
According to some embodiments of the application, the reducing agent is hydroiodic acid and the temperature of the chemical reduction is 80 ℃ to 100 ℃.
According to some embodiments of the present application, the step of filling the phase change material into the holes of the substrate containing the reduced graphene oxide layer to obtain the composite phase change material includes:
placing the matrix containing the reduced graphene oxide layer into a melt of a phase change material, and preserving heat and soaking for a set period of time under the vacuumizing condition that the vacuum degree is-0.1 Mpa;
and cooling and solidifying the soaked matrix at room temperature.
The application also provides a battery thermal management system, which comprises a battery and the composite phase-change material, wherein the composite phase-change material covers the battery.
According to the technical scheme, the invention has the advantages and positive effects that:
according to the preparation method, the reduced graphene oxide layer is formed on the framework of the matrix through growth, on one hand, the composite material has proper thermal conductivity and thermal stability through coating modification of the reduced graphene oxide with high thermal conductivity and high thermodynamic stability, and heat loss can be reduced, so that the composite phase-change material is endowed with good heat preservation performance and thermal cycle stability, and the battery temperature can be prevented from being severely reduced when the preparation method is applied to a battery thermal management system, and the low-temperature performance of the battery can be protected. On the other hand, the reduced graphene oxide layer forms folds on the framework of the matrix, so that the framework of the matrix is formed into a rough surface, and the reduced graphene oxide layer has better affinity to the phase change material, so that the matrix has stronger capillary action and molecular acting force, the adsorption capacity of the phase change material filled in the holes of the matrix is enhanced, and the leakage of the phase change material is effectively prevented.
The preparation process is simple, the operation is simple and convenient, the cost is low, the mass production is convenient, and the prepared composite phase change material has very high heat storage capacity, excellent heat preservation performance and leakage resistance.
Drawings
FIG. 1 is a flow chart of a method of preparing a composite phase change material according to an embodiment of the present invention.
FIG. 2 is a flow chart of filling a phase change material in a hole of a substrate according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a process for preparing a composite phase change material according to an embodiment of the present invention.
FIG. 4 is a scanning electron microscope image of MS, MS/rGO and MS/rGO/PW in an embodiment of the invention.
FIG. 5 is a Fourier infrared spectrum of melamine sponge, graphene oxide, MS/GO and MS/rGO in an embodiment of the invention.
FIG. 6 is a Fourier infrared spectrum of paraffin, MS/rGO, and MS/rGO/PW in an embodiment of the invention.
FIG. 7 is a DGC plot of different composite phase change materials in an embodiment of the present invention.
FIG. 8 is a graph of latent heat of phase change and phase change temperature for different composite phase change materials in an embodiment of the invention.
FIG. 9 is a graph of the results of thermal conductivity of different composite phase change materials in an embodiment of the invention.
FIG. 10 is a graph of mass change after thermal cycling of different composite phase change materials in an embodiment of the invention.
Fig. 11 is an assembled schematic view of three battery modules according to the present invention.
Fig. 12 is a graph showing temperature cooling of three battery modules according to the present invention.
Detailed Description
Exemplary embodiments that embody features and advantages of the present invention will be described in detail in the following description. It will be understood that the invention is capable of various modifications in various embodiments, all without departing from the scope of the invention, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the invention.
In this application, unless otherwise specified, all materials used are commercially available as known in the art.
The application provides a composite phase change material, which comprises a matrix, a reduced graphene oxide layer and a phase change material, wherein the matrix is of a porous structure, the reduced graphene oxide layer is coated on a framework of the matrix, the matrix is coated and modified, and the phase change material is filled in holes of the matrix.
According to the preparation method, the reduced graphene oxide layer is formed on the framework of the matrix through growth, on one hand, the composite material has proper thermal conductivity and thermal stability through coating modification of the reduced graphene oxide with high thermal conductivity and high thermodynamic stability, heat loss can be reduced, and therefore good heat preservation performance and thermal cycle stability are provided for the composite material, and the temperature control duration is prolonged. On the other hand, the reduced graphene oxide layer forms folds on the framework of the matrix, so that the framework of the matrix is formed into a rough surface, and the reduced graphene oxide layer has better affinity to the phase change material, so that the matrix has stronger capillary action and molecular acting force, the adsorption capacity of the phase change material filled in the holes of the matrix is enhanced, and the leakage of the phase change material is effectively prevented.
In some embodiments of the present application, the reduced graphene oxide layer is discontinuously distributed on the skeleton, that is, the reduced graphene oxide layer is in a discontinuous lamellar structure, and forms a partial wrapping state on the skeleton of the matrix, so that the filling amount of the phase-change material in the matrix is improved while the good adsorption performance on the phase-change material is ensured, and the composite material is ensured to have good temperature control performance.
In some embodiments of the present application, the matrix is melamine sponge. The Melamine Sponge (MS) has good adsorption capacity and flame retardant capacity, and has good affinity with carbon materials, and the reduced graphene oxide layer can be uniformly dispersed on the framework of the reduced graphene oxide layer, so that the structure of the composite material prepared by adopting the reduced graphene oxide layer is controllable. And the melamine sponge has higher toughness, is not easy to break, and the flexible three-dimensional structure can reduce the contact thermal resistance between the phase change material and the battery.
In some embodiments of the present application, the phase change material comprises paraffin wax. The paraffin wax has the characteristics of high latent heat value, high thermochemical stability, low vapor pressure in a molten state, low supercooling degree and the like, and can endow the composite material with excellent temperature control effect.
It will be appreciated that the phase change material may be a mixture of one or more other phase change materials having similar chemical properties to paraffin wax, for example the phase change material may be a mixture of paraffin wax and an aliphatic hydrocarbon, or a mixture of paraffin wax and a polyalkylene alcohol.
The application also provides a preparation method of the composite phase change material, referring to fig. 1, the preparation method comprises the following steps:
s101, soaking the matrix in graphene oxide solution, and centrifuging after full soaking to obtain the graphene oxide-adsorbed matrix.
Specifically, graphene oxide is firstly dispersed in water to form a graphene oxide solution, and then the matrix is immersed in the graphene oxide solution for more than 0.5h, and the matrix is extruded for multiple times during the process, so that the matrix fully absorbs the graphene oxide. And then placing the fully infiltrated matrix in a centrifuge for centrifugal treatment, so that the graphene oxide is uniformly dispersed on the skeleton of the matrix, and removing redundant graphene oxide solution in the holes of the matrix to obtain the matrix adsorbed with the graphene oxide.
S102, chemically reducing the matrix adsorbed with the graphene oxide by using a reducing agent, and then sequentially washing and drying to obtain the matrix containing the reduced graphene oxide layer.
Specifically, the substrate adsorbed with the graphene oxide is immersed in a reducing agent solution, and the graphene oxide is reduced to reduced graphene oxide by utilizing the strong reducibility of the reducing agent under the condition suitable for carrying out chemical reduction of the graphene oxide, so that a reduced graphene oxide layer is grown on the framework of the substrate. And then, cleaning the matrix for a plurality of times by using deionized water, removing the reducing agent remained in the matrix, and drying the matrix at 80 ℃ for 10 hours to obtain the matrix with the reduced graphene oxide layer.
And S103, filling the phase change material into the holes of the matrix containing the reduced graphene oxide layer to obtain the composite phase change material.
Specifically, the phase change material is filled in holes of a matrix in a soaking or injection mode, and the composite phase change material is obtained after curing treatment.
In the preparation method, firstly, graphene oxide is adsorbed on a matrix, then, graphene oxide loaded in the matrix is subjected to chemical reduction to enable the matrix to grow on a framework of the matrix to form reduced graphene oxide, on one hand, compared with a mode of directly coating the reduced graphene oxide, the bonding strength between a reduced graphene oxide layer formed by growth and the matrix is higher, the reduced graphene oxide can be effectively prevented from falling off in the use process of a composite material, on the other hand, the reduced graphene oxide is easy to agglomerate in a polymer, and the graphene oxide has better thermodynamic stability, and firstly, the graphene oxide adsorbed on the matrix is favorable for improving the dispersion degree of graphene substances in the matrix.
In some embodiments of the present application, the concentration of graphene oxide solution is 2mg/mL to 10mg/mL, such as 2mg/mL, 3mg/mL, 4mg/mL, 5mg/mL, 6mg/mL, 7mg/mL, 8mg/mL, 9mg/mL, or 10mg/mL. Preferably, the concentration of the graphene oxide solution is 10mg/mL, under the concentration, the enhancement effect of the reduced graphene oxide layer on the capillary action of the matrix is better, the leakage probability of the phase change material is smaller, the better encapsulation effect on the phase change material is realized, and the heat preservation effect of the composite material is also better.
In some embodiments of the present application, the rotational speed of centrifugation is 1500r/min to 1900r/min, such as 1500r/min, 1550r/min, 1600r/min, 1650r/min, 1700r/min, 1750r/min, 1800r/min, 1850r/min, or 1900r/min; the centrifugation time is 1min to 4min, for example 1min, 2min, 3min or 4min. Through optimizing centrifugal speed and centrifugation time, can promote the graphene oxide on the matrix skeleton evenly to disperse when guaranteeing that the graphene oxide that the matrix adsorbs is not thrown away by excessive.
In some embodiments of the present application, the reducing agent is hydroiodic acid and the chemical reduction is performed at a temperature of 80 ℃ to 100 ℃, preferably 90 ℃. The concentration of the hydriodic acid solution may be set according to practical situations, and the application is not limited.
In some embodiments of the present application, referring to fig. 2, the step of filling the phase change material into the hole of the substrate containing the reduced graphene oxide layer to obtain the composite phase change material includes:
s201: and placing the matrix containing the reduced graphene oxide layer into a melt of a phase change material, and preserving heat and soaking for a set period of time under the vacuumizing condition that the vacuum degree is-0.1 Mpa.
Specifically, firstly heating the phase-change material to obtain a molten liquid, then immersing a substrate containing the reduced graphene oxide layer in the molten liquid, and preserving heat and soaking under a vacuumizing condition to enable the phase-change material to be uniformly and fully filled in holes of the substrate, wherein the preserving heat temperature is determined according to the melting temperature of the phase-change material, so long as the phase-change material can be always in a molten state in a soaking process, for example, for paraffin wax, the preserving heat temperature can be 80 ℃. The heat preservation soaking time can be determined according to practical conditions, and the time can be 2 hours, for example, as long as the phase change material is fully filled.
The vacuumizing condition of-0.1 Mpa vacuum degree is favorable for uniformly, fully and efficiently filling the phase change material in the holes of the matrix, and can not influence the main structure of the matrix and the combination of the reduced graphene oxide layer and the matrix, so that the structural stability of the composite material is ensured.
S202, cooling and solidifying the soaked matrix at room temperature.
Specifically, cooling at room temperature, and cutting off the excessive solidified phase-change material exposed at the edge of the matrix after the phase-change material is solidified, thereby obtaining the composite material.
For more detailed example, referring to fig. 3, a process for preparing the composite phase change material of the present application is shown, wherein MS represents melamine sponge, GO represents graphene oxide, rGO represents reduced graphene oxide, and PW represents paraffin.
The application also provides a battery thermal management system, which comprises a battery and the composite phase-change material, wherein the composite phase-change material covers the battery.
In detail, a plurality of mounting positions for mounting the battery can be formed on the composite phase change material based on the structure of the substrate, and the battery is embedded in the mounting positions. More specifically, the battery thermal management system includes a housing, a composite phase change material as an insulating layer disposed in a receiving cavity of the housing, and further, a battery disposed in the receiving cavity.
In order to more clearly and in detail describe the composite phase change material, the preparation method thereof and the battery thermal management system provided by the embodiment of the invention, the following description will be made with reference to specific embodiments.
Example 1
The embodiment provides a composite phase change material, which comprises melamine sponge, a reduced graphene oxide layer and paraffin, wherein the reduced graphene oxide layer is wrapped on a framework of the melamine sponge, and the paraffin is filled in holes of the melamine sponge. Wherein, the porosity of the melamine sponge is above 98 percent, and the melting point of paraffin is 44-46 ℃.
The preparation method of the composite phase change material of the embodiment comprises the following steps:
(1) Taking 10mg/mL of Graphene Oxide (GO) solution, immersing a Melamine Sponge (MS) sample in the GO solution, immersing for half an hour, and extruding the melamine sponge for several times to ensure that the GO solution is fully absorbed by the sponge. Centrifuging the infiltrated sample in a low-speed centrifuge at 1750r/min for 2 minutes, removing redundant GO solution in the melamine sponge pores, and uniformly covering the three-dimensional skeleton of the sponge with graphene oxide 302 to obtain the melamine sponge (MS/GO) coated with the graphene oxide.
(2) Immersing the melamine sponge covered with GO in a heated hydroiodic acid (HI) solution with the HI content of more than or equal to 47%, and reducing the GO on the melamine sponge skeleton into reduced graphene oxide (rGO) by utilizing the strong reducibility of the HI solution. The MS/rGO was then rinsed with deionized water more than ten times to ensure that the HI remaining in the sponge interstices was rinsed clean. Finally, drying the mixture in a drying oven at the temperature of 80 ℃ for 10 hours to obtain the reduced graphene oxide coated modified melamine sponge (MS/rGO).
(3) Firstly, placing a container filled with paraffin into a drying box, and preserving the temperature at 80 ℃ for 1 hour until the paraffin is completely melted. Immersing the prepared MS/rGO into liquid paraffin, then placing the container into a vacuum drying oven, opening a vacuum pump to vacuumize, closing a vacuum valve to maintain pressure when the vacuum degree reaches-0.1 Mpa, and preserving heat at 80 ℃ for two hours; and then taking out the container, cooling for two hours at the room temperature of 25 ℃, and cutting off redundant paraffin to obtain the composite phase-change material MS/rGO/PW.
Example 2
The embodiment provides a composite phase change material, which comprises melamine sponge, a reduced graphene oxide layer and paraffin, wherein the reduced graphene oxide layer is wrapped on a framework of the melamine sponge, and the paraffin is filled in holes of the melamine sponge. Wherein, the porosity of the melamine sponge is above 98 percent, and the melting point of paraffin is 44-46 ℃.
The preparation method of the composite phase change material of the embodiment comprises the following steps:
(1) Diluting 10mg/mL of Graphene Oxide (GO) solution to obtain 2mg/mL of Graphene Oxide (GO) solution, immersing a Melamine Sponge (MS) sample in the GO solution, immersing for half an hour, and extruding the melamine sponge for several times to ensure that the GO solution is fully absorbed by the sponge. Centrifuging the infiltrated sample in a low-speed centrifuge at 1750r/min for 2 minutes, removing redundant GO solution in the melamine sponge pores, and uniformly covering the three-dimensional skeleton of the sponge with graphene oxide 302 to obtain the melamine sponge (MS/GO) coated with the graphene oxide.
(2) Immersing the melamine sponge covered with GO in a heated hydroiodic acid (HI) solution with the HI content of more than or equal to 47%, and reducing the GO on the melamine sponge skeleton into reduced graphene oxide (rGO) by utilizing the strong reducibility of the HI solution. The MS/rGO was then rinsed with deionized water more than ten times to ensure that the HI remaining in the sponge interstices was rinsed clean. Finally, drying the mixture in a drying oven at the temperature of 80 ℃ for 10 hours to obtain the reduced graphene oxide coated modified melamine sponge (MS/rGO).
(3) Firstly, placing a container filled with paraffin into a drying box, and preserving the temperature at 80 ℃ for 1 hour until the paraffin is completely melted. Immersing the prepared MS/rGO into liquid paraffin, then placing the container into a vacuum drying oven, opening a vacuum pump to vacuumize, closing a vacuum valve to maintain pressure when the vacuum degree reaches-0.1 Mpa, and preserving heat at 80 ℃ for two hours; and then taking out the container, cooling for two hours at the room temperature of 25 ℃, and cutting off redundant paraffin to obtain the composite phase-change material MS/rGO/PW.
Example 3
The embodiment provides a composite phase change material, which comprises melamine sponge, a reduced graphene oxide layer and paraffin, wherein the reduced graphene oxide layer is wrapped on a framework of the melamine sponge, and the paraffin is filled in holes of the melamine sponge. Wherein, the porosity of the melamine sponge is above 98 percent, and the melting point of paraffin is 44-46 ℃.
The preparation method of the composite phase change material of the embodiment comprises the following steps:
(1) Diluting 10mg/mL of Graphene Oxide (GO) solution to obtain 5mg/mL of Graphene Oxide (GO) solution, immersing a Melamine Sponge (MS) sample in the GO solution, immersing for half an hour, and extruding the melamine sponge for several times to ensure that the GO solution is fully absorbed by the sponge. Centrifuging the infiltrated sample in a low-speed centrifuge at 1750r/min for 2 minutes, removing redundant GO solution in the melamine sponge pores, and uniformly covering the three-dimensional skeleton of the sponge with graphene oxide 302 to obtain the melamine sponge (MS/GO) coated with the graphene oxide.
(2) Immersing the melamine sponge covered with GO in a heated hydroiodic acid (HI) solution with the HI content of more than or equal to 47%, and reducing the GO on the melamine sponge skeleton into reduced graphene oxide (rGO) by utilizing the strong reducibility of the HI solution. The MS/rGO was then rinsed with deionized water more than ten times to ensure that the HI remaining in the sponge interstices was rinsed clean. Finally, drying the mixture in a drying oven at the temperature of 80 ℃ for 10 hours to obtain the reduced graphene oxide coated modified melamine sponge (MS/rGO).
(3) Firstly, placing a container filled with paraffin into a drying box, and preserving the temperature at 80 ℃ for 1 hour until the paraffin is completely melted. Immersing the prepared MS/rGO into liquid paraffin, then placing the container into a vacuum drying oven, opening a vacuum pump to vacuumize, closing a vacuum valve to maintain pressure when the vacuum degree reaches-0.1 Mpa, and preserving heat at 80 ℃ for two hours; and then taking out the container, cooling for two hours at the room temperature of 25 ℃, and cutting off redundant paraffin to obtain the composite phase-change material MS/rGO/PW.
Comparative example 1
The container with paraffin was placed in a dry box and incubated at 80℃for 1 hour until paraffin was completely melted. Immersing foamy copper with the porosity of more than 98% into liquid paraffin, then placing the container into a vacuum drying oven, opening a vacuum pump for vacuumizing, closing a vacuum valve for maintaining pressure when the vacuum degree reaches-0.1 Mpa, and preserving heat at 80 ℃ for two hours; and then taking out the container, cooling for two hours at the room temperature of 25 ℃, and cutting off redundant paraffin to obtain the copper foam paraffin phase-change material.
The properties of the obtained composite phase change material were tested.
(1) Chemical topography analysis
Fig. 4 is a scanning electron microscope image of Melamine Sponge (MS), melamine sponge with reduced graphene oxide layer (MS/rGO) prepared in example 1, and composite phase change material (MS/rGO/PW) prepared in example 1 at different magnifications. From fig. 4 (a) and (b), it can be seen that the melamine sponge consists of a smooth three-dimensional network structure, the sponge skeleton has a diameter of about 5 μm, and the melamine sponge has a larger porosity because the support skeleton occupies a smaller space than the voids inside. Fig. 4 (c) and (d) show the covering condition of graphene oxide after being reduced to reduced graphene oxide on a sponge skeleton, and the melamine sponge skeleton has no change in structure after centrifugation and hydroiodic acid solution soaking, so that the three-dimensional porous structure is still maintained, and the elastic flexibility of the melamine sponge skeleton is maintained; the reduced graphene oxide is not continuous on the framework, but distributed in a sheet form, namely the reduced graphene oxide layer is in a discontinuous layered structure on the framework. As can be seen from fig. 4 (e) and (f), the paraffin completely fills the pores of the melamine sponge, and the distribution is relatively uniform. The porosity of the sponge is high, so that the paraffin filling amount is large, and the phase change latent heat is large; and the pores have smaller diameters, about 50 μm, which helps to create capillary adsorption forces and prevent paraffin leakage.
(2) Fourier infrared spectroscopy
Fig. 5 is a fourier infrared spectrum of Melamine Sponge (MS), graphene Oxide (GO), graphene oxide-adsorbed melamine sponge (MS/GO) prepared in example 1, and reduced graphene oxide-coated modified melamine sponge (MS/rGO) prepared in example 1. As can be seen, for melamine sponge, the wavenumber is 816cm -1 、1620cm -1 、3430cm -1 The three peaks of (a) are bending vibration of the triazine ring, stretching vibration of cyano group c=n, and stretching vibration of imino group N-H, respectively. Graphene oxide wavenumber 1433cm -1 、1633cm -1 The peaks of (2) correspond to the flexural vibration of the alcoholic hydroxyl group O-H and the tensile vibration of c=o in the carboxyl group. After graphene oxide and melamine sponge are combined into MS/GO, the characteristic peak of the oxygen-containing functional group still exists, the wave number is unchanged, and the wave number is 3398cm -1 The peak at this location broadens, indicating that no chemical reaction occurs with GO covering the sponge scaffold. In the reduction of the hydriodic acid solution to obtain MS/rGO, the strength of the oxygen-containing functional groups O-H and C=O is obviously reduced, which indicates that the oxygen-containing functional groups in GO are reduced, and the reduced graphene oxide layer structure is obtained.
Fig. 6 is a fourier infrared spectrum of Paraffin Wax (PW), reduced graphene oxide coated modified melamine sponge (MS/rGO) prepared in example 1, and composite phase change material (MS/rGO/PW) prepared in example 1. The four characteristic peaks of paraffin wax are each wavenumber 717cm -1 Methylene CH of 2 Plane vibration of wavenumber 1378cm -1 、1470cm -1 Deformation vibration of methine CH and wave number 2904cm -1 Methylene CH of 2 Is not symmetrical to the vibration of the expansion and contraction. In MS/rGO/PW obtained by compounding paraffin and MS/rGO, compound phase change is carried outThe characteristic peaks of the material are similar to paraffin, the intensity is not changed, and the deviation is not generated, which indicates that the paraffin is filled in a physical immersion way as a component in MS/rGO and does not generate chemical reaction. The paraffin and MS/rGO can keep the original characteristics of the paraffin and the MS/rGO to work, and the advantages of the paraffin and the MS/rGO are fully exerted.
(3) DSC test
Fig. 7 is a graph of DGC of the composite phase change materials obtained in examples 1 to 3, the latent heat and the melting point of the phase change materials can be obtained by DSC curves, the results of the latent heat of phase change and the phase change temperature of the composite phase change materials obtained in examples 1 to 3 are shown in fig. 8, and meanwhile, the composite materials obtained after pure paraffin is filled in melamine sponge holes are used as a comparison, and the specific filling method is the same as that in example 1.
DSC test is carried out by adopting a German relaxation-resistant STA449F5 synchronous thermal analyzer, the temperature is increased from 25 ℃ to 100 ℃ at the heating rate of 5 ℃/min, and protective gas nitrogen is introduced in the heating process.
According to FIGS. 7 and 8, the phase change latent heat of pure paraffin wax is 139.1J/g, the phase change latent heat of the MS/rGO/PW composite phase change material obtained at the concentration of 2mg/mL is 125.3J/g, the phase change latent heat of the MS/rGO/PW composite phase change material obtained at the concentration of 5mg/mL is 108.2J/g, and the phase change latent heat of the MS/rGO/PW composite phase change material obtained at the concentration of 10mg/mL is 98.9J/g. It can be seen that as the concentration of the graphene oxide solution is increased, the latent heat of phase change of the composite phase change material is reduced, and the latent heat of the composite phase change material prepared by using 10mg/mL graphene oxide solution is reduced by 28.9% compared with pure paraffin. This is because the concentration of graphene oxide increases to thicken the reduced graphene oxide layer on the sponge skeleton, the sponge pores decrease, the amount of adsorbed paraffin decreases, the latent heat of phase change is mainly provided by paraffin, and graphene does not provide the latent heat of phase change, resulting in a decrease in the latent heat of the composite phase change material.
The phase transition temperature of the composite phase change material prepared by the graphene oxide solution of 2mg/mL, 5mg/mL and 10mg/mL is 42.2 ℃, 42 ℃, 43.2 ℃ and 43.7 ℃ respectively. It can be seen that when the concentration of graphene oxide is low, the phase transition temperature of the MS/rGO/PW composite phase-change material is slightly different from that of pure paraffin, the phase transition temperature of the composite phase-change material prepared from the graphene oxide solution with the concentration of 2mg/mL is only 0.2 ℃, but when the concentration of graphene oxide is high, the phase transition temperature of the obtained composite phase-change material is obviously increased, compared with the melting point of pure paraffin, the melting point of the composite phase-change material is increased by 1 ℃, and the reason of the increase of the melting point can be explained according to the description of Clapeyrn-Clausius equation.
Wherein T is 1 、T 2 And P 1 、P 2 Is the melting point and pressure in both states,is the change in volume during the phase change,is enthalpy change, volume is increased in the paraffin phase change process, and because the three-dimensional graphene skeleton (MS/rGO) has a certain adsorption limiting effect on paraffin, the pressure born by the paraffin is increased, and P 2 ＞P 1 T is then 2 ＞T 1 The melting point of paraffin increases.
(4) Thermal conductivity testing
Fig. 9 is a graph showing the thermal conductivity coefficient results of the composite phase change materials obtained in examples 1 to 3, and meanwhile, the composite material obtained by filling pure paraffin into melamine sponge holes is used as a comparison, and the filling method is the same as that in example 1.
The heat conductivity coefficient testing device is an XIATECH TC3000 heat conductivity coefficient tester, a transient heat wire method is used for measurement, the measurement method is high in precision and convenient to prepare samples, a heat wire is clamped between two samples with the same shape and size and smooth surfaces during measurement, the heat wire is pressed by weights, no air gap is reserved around the heat wire, and the heat wire is electrified to generate heat for heating.
As shown in FIG. 9, the thermal conductivity of the pure paraffin wax is 0.21W/m.K, the thermal conductivity of the MS/rGO/PW composite phase change material of 2mg/mL is 0.217W/m.K, the thermal conductivity of the MS/rGO/PW composite phase change material of 5mg/mL is 0.226W/m.K, and the thermal conductivity of the MS/rGO/PW composite phase change material of 10mg/mL is 0.271W/m.K, and compared with the pure paraffin wax, the thermal conductivity of the obtained composite phase change material is enhanced to a certain degree, the thermal conductivity of the obtained composite phase change material is positively correlated with the graphene content, and the thermal conductivity of the 10mg/mL composite material is improved by about 30% compared with the thermal conductivity of the paraffin wax. However, in general, the magnitude of the increase in thermal conductivity of the MS/rGO/PW composite phase change material is not large, and the thermal conductivity is only 3% to 8% enhanced, especially for low concentration composite samples. The composite phase-change material is prepared by taking melamine sponge as a framework, the heat conductivity coefficient of the melamine sponge is extremely low and only 0.034W/m.K, and the heat conductivity of the composite phase-change material is negatively influenced; the reduced graphene oxide has high heat conductivity, and the reduced graphene oxide is covered on the sponge framework in a thin layer form, so that the heat conductivity of the sponge is enhanced to be at a proper level, and the heat conductivity improving effect and the graphene content are in positive correlation.
The composite phase-change material prepared by the invention has proper heat conductivity coefficient, can be suitable for a low-temperature heat management system, can reduce heat loss and enhance the heat preservation capability of the heat management system in a low-temperature environment.
(5) Quality stability test
The quality stability test method comprises the following steps: the composite phase change materials obtained in examples 1 to 3 were placed on filter paper, incubated at 70℃for 20 minutes, then cooled and weighed, and the mass change of the materials was recorded 10 times in a cycle. As shown in fig. 10, the quality of the phase change materials with different graphene contents of 2, 5 and 10mg/mL is changed into 82.2%, 85.2% and 90.2% respectively, and as can be seen from fig. 10, the quality of the composite phase change material with the previous 3 times of thermal cycling is reduced, paraffin is lost, the quality change is smaller and smaller along with the increase of the cycle times, and the leakage amount of the paraffin is smaller and smaller, because the graphene has lipophilicity, the graphene can have good affinity with the paraffin when covered on a three-dimensional sponge skeleton, and folds are formed on the skeleton, the surface roughness is changed, and the capillary adsorption force of the graphene sponge can be enhanced. The higher the graphene content is, the smaller the leakage amount of paraffin is, the leakage rate of the composite phase-change material obtained at the concentration of 2mg/mL is 17.8%, and the leakage rate of the composite phase-change material obtained at the concentration of 10mg/mL is only 9.2%, which indicates that MS/rGO prepared by high-concentration graphene oxide can form a good encapsulation effect on paraffin.
In order to make the leakage-proof performance and the heat conductivity coefficient of the composite phase-change material at excellent levels, the concentration of the graphene oxide solution used in preparing the composite phase-change material is preferably 10mg/mL.
(6) Battery thermal insulation experiment
Referring to fig. 11, battery modules were fabricated using the materials obtained in example 1 and comparative example 1, respectively, and battery insulation experiments were performed using the battery modules without the phase change material as a control, and the temperature cooling curves of the three battery modules are shown in fig. 12.
It can be seen that, among the three battery modules, the battery module using the composite phase-change material of the embodiment is slowest in temperature drop, when the temperature drops from 30 ℃ to 15 ℃, the battery module without the phase-change material is 2257s in natural cooling use time, the battery module using the foam copper phase-change material of the comparative example 1 is 3915s in cooling use time, the battery module using the composite phase-change material of the embodiment 1 is 4427s in cooling use time, and compared with the cooling without the phase-change material, the cooling time of the module after the phase-change material is added is prolonged, the foam copper paraffin phase-change material time is prolonged by 73.4%, and the time of using the composite phase-change material of the application is prolonged by nearly one time, so that the composite phase-change material of the application has a good heat preservation effect.
When the temperature is reduced to 0 ℃, the natural cooling of air takes 6263 seconds, the cooling time of the foam copper paraffin wax phase-change material and the composite phase-change material of the application is prolonged by 2611s and 3489s, and the phase-change material can maintain the temperature of the battery above 0 ℃ for a long time through the specific heat of the phase-change material. Compared with the copper foam paraffin phase-change material of comparative example 1, the composite phase-change material of example 1 has an improved heat preservation time of 878 seconds, because the thermal conductivity of the composite phase-change material is lower than that of the copper foam paraffin, heat can be stored in the material for a longer time, heat dissipation is reduced, and therefore the composite phase-change material has better heat preservation performance at low temperature, and the capacity of a battery can be prevented from being attenuated.
According to the technical scheme, the invention has the advantages and positive effects that:
according to the preparation method, the reduced graphene oxide layer is formed on the framework of the matrix through growth, on one hand, the composite material has proper thermal conductivity and thermal stability through coating modification of the reduced graphene oxide with high thermal conductivity and high thermodynamic stability, heat loss can be reduced, and therefore good heat preservation performance and thermal cycle stability are given to the composite phase-change material. On the other hand, the reduced graphene oxide layer forms folds on the framework of the matrix, so that the framework of the matrix is formed into a rough surface, and the reduced graphene oxide layer has better affinity to the phase change material, so that the matrix has stronger capillary action and molecular acting force, the adsorption capacity of the phase change material filled in the holes of the matrix is enhanced, and the leakage of the phase change material is effectively prevented.
While the invention has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A composite phase change material, comprising:
a substrate having a porous structure;
the reduced graphene oxide layer is coated on the framework of the matrix;
and the phase change material is filled in the holes of the matrix.
2. The composite phase change material of claim 1, wherein the reduced graphene oxide layer is discontinuously distributed on the scaffold.
3. The composite phase change material of claim 1, wherein the matrix is melamine sponge.
4. The composite phase change material of claim 1, wherein the phase change material comprises paraffin wax.
5. A method of preparing a composite phase change material according to any one of claims 1 to 4, comprising:
soaking a matrix in a graphene oxide solution, and centrifuging after full soaking to obtain a matrix adsorbed with graphene oxide;
chemically reducing the matrix adsorbed with the graphene oxide by using a reducing agent, and then washing and drying sequentially to obtain a matrix containing a reduced graphene oxide layer;
and filling the phase change material into the holes of the matrix containing the reduced graphene oxide layer to obtain the composite phase change material.
6. The method according to claim 5, wherein the concentration of the graphene oxide solution is 2mg/mL to 10mg/mL.
7. The method according to claim 5, wherein the rotational speed of the centrifugation is 1500r/min to 1900r/min, and the time of the centrifugation is 1min to 4min.
8. The method according to claim 5, wherein the reducing agent is hydroiodic acid and the chemical reduction is carried out at a temperature of 80 to 100 ℃.
9. The method according to claim 5, wherein the step of filling the phase change material into the pores of the matrix containing the reduced graphene oxide layer to obtain the composite phase change material comprises:
placing the matrix containing the reduced graphene oxide layer into a melt of a phase change material, and preserving heat and soaking for a set period of time under the vacuumizing condition that the vacuum degree is-0.1 Mpa;
and cooling and solidifying the soaked matrix at room temperature.
10. A battery thermal management system comprising a battery and a composite phase change material according to any one of claims 1 to 4, the composite phase change material encasing the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310460200.4A CN116496762A (en) | 2023-04-25 | 2023-04-25 | Composite phase change material, preparation method and battery thermal management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310460200.4A CN116496762A (en) | 2023-04-25 | 2023-04-25 | Composite phase change material, preparation method and battery thermal management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116496762A true CN116496762A (en) | 2023-07-28 |
Family
ID=87317800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310460200.4A Pending CN116496762A (en) | 2023-04-25 | 2023-04-25 | Composite phase change material, preparation method and battery thermal management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116496762A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109705816A (en) * | 2019-02-18 | 2019-05-03 | 西南交通大学 | Multifunction flexible phase-change material, preparation method and construction material |
| CN111261974A (en) * | 2020-01-21 | 2020-06-09 | 广东工业大学 | Phase change material module for battery thermal management system and preparation method and application thereof |
| CN111944496A (en) * | 2020-08-27 | 2020-11-17 | 上海交通大学 | Flexible phase-change heat storage composite material based on three-dimensional elastic foam structure and preparation and application thereof |
| CN111969274A (en) * | 2020-07-06 | 2020-11-20 | 广东工业大学 | Phase change material module for battery thermal management system and preparation method and application thereof |
| CN115418195A (en) * | 2022-08-18 | 2022-12-02 | 嘉兴赛曼泰克新材料有限公司 | Composite phase-change heat storage material for lithium battery pack heat management and preparation method thereof |
-
2023
- 2023-04-25 CN CN202310460200.4A patent/CN116496762A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109705816A (en) * | 2019-02-18 | 2019-05-03 | 西南交通大学 | Multifunction flexible phase-change material, preparation method and construction material |
| CN111261974A (en) * | 2020-01-21 | 2020-06-09 | 广东工业大学 | Phase change material module for battery thermal management system and preparation method and application thereof |
| CN111969274A (en) * | 2020-07-06 | 2020-11-20 | 广东工业大学 | Phase change material module for battery thermal management system and preparation method and application thereof |
| CN111944496A (en) * | 2020-08-27 | 2020-11-17 | 上海交通大学 | Flexible phase-change heat storage composite material based on three-dimensional elastic foam structure and preparation and application thereof |
| CN115418195A (en) * | 2022-08-18 | 2022-12-02 | 嘉兴赛曼泰克新材料有限公司 | Composite phase-change heat storage material for lithium battery pack heat management and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| GONG CHENG, ET AL.: "3D graphene paraffin composites based on sponge skeleton for photo thermal conversion and energy storage", 《APPLIED THERMAL ENGINEERING》, vol. 178, pages 2 * |
| LU-YUE LIU, ET AL.: "Reduced graphene oxide modified melamine sponges filling with paraffin for efficient solar-thermal conversion and heat management", 《CHINESE JOURNAL OF CHEMICAL ENGINEERING》, vol. 41, pages 2 * |
| 李秋琴等主编: "《动力电池管理及维护技术》", vol. 1, 29 February 2020, 电子科技大学出版社, pages: 204 - 205 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wu et al. | Highly thermally conductive and flexible phase change composites enabled by polymer/graphite nanoplatelet-based dual networks for efficient thermal management | |
| Tao et al. | Three-dimensional rGO@ sponge framework/paraffin wax composite shape-stabilized phase change materials for solar-thermal energy conversion and storage | |
| JP7263397B2 (en) | Method for producing modified graphite-based composite material for long-term cycle and lithium-ion battery containing the material | |
| Jia et al. | Preparation and performances of palmitic acid/diatomite form‐stable composite phase change materials | |
| Wu et al. | Effects of functional binders on electrochemical performance of graphite anode in potassium-ion batteries | |
| Wu et al. | A novel electrospun TPU/PVdF porous fibrous polymer electrolyte for lithium ion batteries | |
| Fan et al. | Shape‐stabilized phase change materials based on stearic acid and mesoporous hollow SiO2 microspheres (SA/SiO2) for thermal energy storage | |
| Fang et al. | Improving the wettability and thermal resistance of polypropylene separators with a thin inorganic–organic hybrid layer stabilized by polydopamine for lithium ion batteries | |
| JP2012531716A (en) | Polymer composite electrolyte, battery containing polymer composite electrolyte, and method for preparing the same | |
| Yang et al. | A superlephilic/superhydrophobic and thermostable separator based on silicone nanofilaments for Li metal batteries | |
| CN113644378B (en) | Functional coating diaphragm and preparation method and application thereof | |
| Chao et al. | Enhanced wettability and thermal stability of polypropylene separators by organic–inorganic coating layer for lithium‐ion batteries | |
| Fang et al. | Construction of porous coating layer and electrochemical performances of the corresponding modified polyethylene separators for lithium ion batteries | |
| Liu et al. | Blending-based poly (vinylidene fluoride)/polymethyl methacrylate membrane for rechargeable lithium-ion batteries | |
| Wang et al. | Synthesis of porous Al2O3‐PVDF composite separators and their application in lithium‐ion batteries | |
| Wang et al. | Preparation and performance of polypropylene separator modified by SiO2/PVA layer for lithium batteries | |
| CN115160991B (en) | Multifunctional biochar-based phase change composite material and preparation method thereof | |
| Chen et al. | Carbon layer-modified mesoporous silica supporter for PEG to improve the thermal properties of composite phase change material | |
| CN110707392B (en) | Preparation method of composite phase change coating beneficial to heat dissipation of lithium ion battery | |
| CN210926131U (en) | High-safety good-cyclicity lithium ion battery coating isolation film | |
| CN114180558B (en) | Preparation method of graphene micro-nano cavity superconducting film, related product and application | |
| CN115710117A (en) | Aerogel composite material and preparation method and application thereof | |
| CN116496762A (en) | Composite phase change material, preparation method and battery thermal management system | |
| Song et al. | Biomass-derived porous carbon aerogels for effective solar thermal energy storage and atmospheric water harvesting | |
| Li et al. | A dendrite-blocking polyimide-meta-aramid separator with ultrahigh strength and thermostability for high-security lithium-ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |