CN211999543U - Phase change energy storage composite film - Google Patents
Phase change energy storage composite film Download PDFInfo
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- CN211999543U CN211999543U CN202020112390.2U CN202020112390U CN211999543U CN 211999543 U CN211999543 U CN 211999543U CN 202020112390 U CN202020112390 U CN 202020112390U CN 211999543 U CN211999543 U CN 211999543U
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- energy storage
- change energy
- phase change
- phase
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Abstract
The utility model discloses a phase change energy storage composite film, its structure includes basement membrane single face glue and from type membrane, the coating phase change energy storage layer and the protection film of upper surface on the single face is glued. The utility model discloses a phase change energy storage composite film thickness is steerable at 0.1-1mm, has characteristics such as high phase transition enthalpy, flexibility, stability excellence, and it is nimble convenient to use, and the application is wide, uses and can effectively reduce temperature rise range in the twinkling of an eye at high heat flux density's position.
Description
Technical Field
The utility model relates to a heat management technical field especially relates to a phase change energy storage composite film.
Background
Along with the improvement of the integration degree of an electronic circuit, electronic components are increasingly miniaturized and highly powered, the heat flux density of various electronic components is also higher and higher, and if effective heat management cannot be performed, the user experience can be seriously influenced, and even potential risks of combustion or explosion exist. The existing heat management products are mainly of temperature equalization and heat dissipation type, and although the heat dissipation efficiency can be improved, the instant temperature rise amplitude of the electronic product in use cannot be effectively reduced. Phase change material can absorb or release a large amount of heats when taking place phase transition under specific temperature, can effectively reduce instantaneous temperature rise and increase, and current phase change energy storage product is mostly sheet or panel, has restricted its application in the aspect of thickness, flexibility etc..
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the phase change energy storage product exists in the aspect of thickness, flexibility, heat transfer and heat storage efficiency etc., the utility model provides a can effectively reduce the flexible film material of electronic product instantaneous temperature rise amplification.
The utility model adopts the technical proposal that: the phase change energy storage composite film structurally comprises a release film, a single-sided adhesive, a phase change energy storage layer and a protective film.
Preferably, the release film is made of PET (polyethylene terephthalate) and has the thickness of 50 um.
Preferably, the single-sided adhesive film layer is made of a PET material, and the adhesive layer is one of acrylic adhesive, silica gel and acrylic pressure-sensitive adhesive.
Preferably, the thickness of the single-sided adhesive is 5-20 um, and the bonding strength is more than or equal to 0.5N/mm.
Preferably, the single-sided adhesive can be replaced by a soaking layer, the material is one of copper, aluminum or graphite, and the thickness is 10-50 um.
Preferably, the phase change energy storage layer is formed by coating phase change material microcapsules and an adhesive on a single-sided adhesive and curing the single-sided adhesive.
Preferably, the phase change material microcapsule comprises an inner phase change material core material and an outer shell material: wherein the phase-change material as the core material is an organic phase-change material, and the phase-change temperature is 25-50 ℃; the shell material is inorganic or high molecular material, and has compact structure.
Preferably, the phase-change energy storage layer can be prepared by selecting an aqueous system, adding a water-based adhesive into an aqueous microcapsule dispersion, dispersing and mixing the aqueous microcapsule dispersion and the water-based adhesive with other aqueous auxiliaries to form slurry, uniformly coating the slurry on the film surface of the single-sided adhesive, and then curing at a certain temperature, such as 50-90 ℃, preferably 80 ℃; or an oily system can be selected, microcapsule powder is filled into film-forming resin, a proper amount of solvent is added, and then other oily auxiliaries are matched to be uniformly mixed and dispersed, and then the mixture is uniformly coated on the film surface of the single-sided adhesive and is solidified under a certain condition to obtain the single-sided adhesive.
Preferably, the phase change energy storage layer is prepared by selecting an aqueous system, uniformly mixing aqueous microcapsule dispersion liquid with a water-based adhesive and other aqueous auxiliaries to form slurry, uniformly coating the slurry on the film surface of the single-sided adhesive, and then curing at a certain temperature.
Preferably, the used protective film is made of one of PET, PE, PC and PI, and the thickness is 10-30 um.
Preferably, the phase-change enthalpy of the phase-change energy storage layer used is more than or equal to 180J/g, such as 180-200J/g.
The utility model has the advantages that: the flexible thin film is formed by compounding the phase change energy storage layer and the upper and lower layers of films, so that the flexible thin film is flexible and convenient in practical application, can absorb a large amount of heat when phase change occurs, and effectively reduces the instant temperature rise amplitude. Can also be matched with soaking materials for use, thereby further enhancing the temperature control capability.
Drawings
The invention will be further described with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of a phase change energy storage thin film;
fig. 2 is a simulation test comparison diagram of the phase change energy storage composite film of the present invention.
Detailed Description
[ example 1 ]
Uniformly mixing and dispersing the aqueous microcapsule dispersion (phase transition temperature of 35 ℃), the aqueous adhesive and other auxiliary agents to prepare slurry. A10-um single-sided adhesive is attached to a 50-um release film to form a base film, and the slurry is uniformly coated on one side of the single-sided adhesive. And curing at 80 ℃ for 20 minutes to obtain the phase change energy storage layer. And a 10um thick PET protective film is attached to the phase change energy storage layer. The thickness of the prepared phase change energy storage composite film is 0.25 mm.
[ example 2 ]
Uniformly mixing and dispersing the aqueous microcapsule dispersion liquid (phase transition temperature 44 ℃), the aqueous adhesive and other auxiliary agents to prepare slurry. A10-um single-sided adhesive is attached to a 50-um release film to form a base film, and the slurry is uniformly coated on one side of the single-sided adhesive. And curing at 80 ℃ for 20 minutes to obtain the phase change energy storage layer. And a 20um thick PET protective film is attached to the phase change energy storage layer. The phase change energy storage composite film is prepared and has the thickness of 0.35 mm.
[ example 3 ]
Carrying out simulation test by using a thermal management simulation tester under the following test conditions:
setting heating plate power 2W or 4W, surface size 50mm, respectively adding 50mm 0.25mm carbon film, phase change film with same size and carbon film composite, and testing the temperature change curve of the heating plate along with time.
As shown in FIG. 2, the heating sheet has the slowest temperature rise rate under the condition of the additional installation of the phase change film and the carbon film composite, when the heating time is 15 minutes, the temperature difference of 2W of the heat source power reaches 5 ℃, the temperature difference of 4W of the heat source power reaches 8 ℃, and the temperature rise rate is obviously slowed down. The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (9)
1. The phase change energy storage composite film is characterized by comprising a release film, a single-sided adhesive, a phase change energy storage layer coated on the single-sided adhesive and a protective film on the upper surface, wherein the phase change energy storage composite film is flexible, and the thickness of the phase change energy storage composite film is 0.1-1 mm.
2. The phase change energy storage composite film according to claim 1, wherein the release film is made of PET.
3. The phase change energy storage composite film according to claim 1, wherein the single-sided adhesive comprises a film layer and an adhesive layer, wherein the film layer is made of PET, and the adhesive layer is one of acrylic adhesive, silica gel or acrylic pressure sensitive adhesive.
4. The phase-change energy storage composite film according to claim 1, wherein the phase-change energy storage layer is formed by coating a phase-change material and an adhesive on a single-sided adhesive and curing, and the phase-change material is in a microcapsule form.
5. The phase change energy storage composite film according to claim 4, wherein the phase change energy storage layer is an aqueous system or an oily system.
6. The phase change energy storage composite film according to claim 1, wherein the protective film is one of PET, PE, PC or PI.
7. The phase-change energy storage composite film according to claim 1, wherein the phase-change temperature of the phase-change energy storage layer is 20-90 ℃, and the enthalpy of phase change is not less than 180J/g.
8. The phase change energy storage composite film according to claim 1, wherein the single-sided adhesive layer can be replaced by a thermal equalization layer.
9. The phase change energy storage composite film of claim 8, wherein the thermal uniforming layer is one of copper, aluminum, or graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020112390.2U CN211999543U (en) | 2020-01-17 | 2020-01-17 | Phase change energy storage composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020112390.2U CN211999543U (en) | 2020-01-17 | 2020-01-17 | Phase change energy storage composite film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211999543U true CN211999543U (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202020112390.2U Active CN211999543U (en) | 2020-01-17 | 2020-01-17 | Phase change energy storage composite film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114425898A (en) * | 2022-01-13 | 2022-05-03 | 中国乐凯集团有限公司 | Heat conduction and heat storage film and preparation method thereof |
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2020
- 2020-01-17 CN CN202020112390.2U patent/CN211999543U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114425898A (en) * | 2022-01-13 | 2022-05-03 | 中国乐凯集团有限公司 | Heat conduction and heat storage film and preparation method thereof |
| CN114425898B (en) * | 2022-01-13 | 2023-10-27 | 中国乐凯集团有限公司 | Heat conduction and heat storage film and preparation method thereof |
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