CN219950873U - Flame-retardant composite film for lithium battery - Google Patents
Flame-retardant composite film for lithium battery Download PDFInfo
- Publication number
- CN219950873U CN219950873U CN202320339013.6U CN202320339013U CN219950873U CN 219950873 U CN219950873 U CN 219950873U CN 202320339013 U CN202320339013 U CN 202320339013U CN 219950873 U CN219950873 U CN 219950873U
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- China
- Prior art keywords
- layer
- heat dissipation
- lithium battery
- silica gel
- film
- 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.)
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 47
- 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 title claims abstract description 30
- 239000003063 flame retardant Substances 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 73
- 230000017525 heat dissipation Effects 0.000 claims abstract description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000010408 film Substances 0.000 claims abstract description 41
- 239000000741 silica gel Substances 0.000 claims abstract description 41
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 41
- 229920002799 BoPET Polymers 0.000 claims abstract description 14
- 239000012790 adhesive layer Substances 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000013039 cover film Substances 0.000 claims abstract description 10
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 10
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 6
- 238000013021 overheating Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Primary Cells (AREA)
Abstract
A lithium battery flame-retardant composite film belongs to the technical field of flame-retardant composite films. The PET film comprises a PET film layer, a heat dissipation layer and an adhesive layer from top to bottom in sequence; the heat dissipation layer comprises an upper heat conduction silica gel layer and a lower heat conduction silica gel layer, a cavity is formed between the upper heat conduction silica gel layer and the lower heat conduction silica gel layer, and graphene powder is filled in the cavity; the PET rete upper surface equidistance is provided with the heat dissipation area, the heat dissipation hole has evenly been seted up to the heat dissipation area, the top bonding cover film of heat dissipation area. The radiating holes are arranged, so that the problem that the lithium battery cannot normally radiate heat due to the fact that the lithium battery is wrapped by the film is solved, the problem that the lithium battery is damaged due to overheating is solved, radiating efficiency can be improved due to the radiating areas arranged at equal intervals, the situation that the film is separated due to the fact that viscosity is reduced due to the fact that the temperature is too high can be prevented, and meanwhile the phenomenon that the lithium battery is spontaneously ignited due to the fact that the temperature is too high can be prevented. The flame-retardant composite film is suitable for lithium batteries.
Description
Technical Field
The utility model belongs to the technical field of flame-retardant composite films, and particularly relates to a flame-retardant composite film for a lithium battery.
Background
The flame-retardant composite film has the advantages of higher impact resistance, heat resistance, good dimensional stability, electrical insulation property and the like, and is widely applied to the fields of automobile parts, household appliances, electronic appliances and the like, so that a special flame-retardant composite film is generally required to be used in the application of lithium batteries.
The prior patent (publication number: 218020620U) discloses an insulating flame-retardant release film, which has good flame-retardant effect, and can reduce the smoke generation amount during plastic combustion so as to play a role of a smoke suppressant, but in actual use, a lithium battery can generate heat during operation, and the lithium battery cannot emit heat under the wrapping of the film, so that the lithium battery is easy to damage due to overheating, and in order to prevent the situation, the electronic product needs to be closed regularly to realize cooling of the lithium battery, thereby influencing the normal use of the electronic product, and meanwhile, the viscosity of the film can be gradually reduced due to the aggregation of heat and the rise of temperature, so that the film is easy to separate, and therefore, the lithium battery flame-retardant composite film needs to be replaced.
Disclosure of Invention
The utility model aims to provide a lithium battery flame-retardant composite film; the problem that heat of the lithium battery cannot be normally emitted under the wrapping of the film in the background technology is solved, so that damage is easy to occur due to overheat of the lithium battery.
A lithium battery flame-retardant composite film is sequentially divided into a PET film layer, a heat dissipation layer and an adhesive layer from top to bottom;
the heat dissipation layer comprises an upper heat conduction silica gel layer and a lower heat conduction silica gel layer, a cavity is formed between the upper heat conduction silica gel layer and the lower heat conduction silica gel layer, and graphene powder is filled in the cavity;
the lower surface of the upper heat-conducting silica gel layer is consistent with the upper surface structure of the lower heat-conducting silica gel layer and is of a concave-convex structure;
the PET rete upper surface equidistance is provided with the heat dissipation area, the heat dissipation hole has evenly been seted up to the heat dissipation area, the top bonding cover film of heat dissipation area.
Further, the adhesive layer is adhered to the lithium battery.
Further, the thickness of the heat dissipation layer is 22-28 micrometers.
Further, the cavities and the radiating holes are arranged in a staggered mode.
Further, the radiating holes penetrate through the PET film layer, the radiating layer and the adhesive layer.
Further, the area of the covering film is consistent with that of the heat dissipation area.
Further, a uncovering piece is fixedly connected to one side of the covering film.
The utility model has the following advantages:
1. according to the lithium battery flame-retardant composite film, heat generated when the lithium battery works can be conveniently emitted through the heat-radiating holes, the problem that the lithium battery cannot normally emit heat due to the fact that the lithium battery is wrapped by the film is effectively avoided, damage is easy to occur due to overheat of the lithium battery, heat-radiating efficiency can be improved due to the heat-radiating holes which are arranged at equal intervals, the situation that the viscosity of the film is reduced due to overhigh temperature to separate the film can be prevented due to timely heat discharge, and the phenomenon that the lithium battery is spontaneously ignited due to overhigh temperature can be prevented.
2. According to the flame-retardant composite film for the lithium battery, disclosed by the utility model, the heat can be conducted through the upper heat-conducting silica gel layer, the graphene powder and the lower heat-conducting silica gel layer, so that the heat dissipation purpose is achieved, the problem that the lithium battery is damaged due to overheating is further prevented, and the contact area between the upper heat-conducting silica gel layer and the graphene powder can be enlarged due to the concave-convex structural design of the upper heat-conducting silica gel layer and the lower heat-conducting silica gel layer, so that the heat conduction and dissipation speed is increased.
The flame-retardant composite film is suitable for lithium batteries.
Drawings
FIG. 1 is a schematic view of a longitudinal section of a flame retardant composite film for a lithium battery in the utility model;
FIG. 2 is a schematic top view of a flame retardant composite film for a lithium battery according to the present utility model;
FIG. 3 is a schematic top view of a main body of a flame retardant composite film for a lithium battery according to the present utility model;
in the figure: 1. a PET film layer; 2. a heat dissipation layer; 3. an adhesive layer; 4. a heat radiation hole; 5. a cover film; 6. uncovering the sheet; 21. a heat conducting silica gel layer is arranged on the upper surface of the substrate; 22. a lower heat conducting silica gel layer; 23. and (3) graphene powder.
Detailed Description
The technical scheme of the utility model is not limited to the specific embodiments listed below, and also includes any combination of the specific embodiments.
The first embodiment is as follows: referring to fig. 1 to 3, the flame-retardant composite film for lithium battery of the present embodiment is sequentially divided into a PET film layer 1, a heat dissipation layer 2 and an adhesive layer 3 from top to bottom;
the heat dissipation layer 2 comprises an upper heat conduction silica gel layer 21 and a lower heat conduction silica gel layer 22, a cavity is formed between the upper heat conduction silica gel layer 21 and the lower heat conduction silica gel layer 22, and graphene powder 23 is filled in the cavity;
the lower surface of the upper heat-conducting silica gel layer 21 is consistent with the upper surface structure of the lower heat-conducting silica gel layer 22 and has a concave-convex structure;
the PET rete 1 upper surface equidistance is provided with the heat dissipation area, the heat dissipation area has evenly seted up louvre 4, the top bonding cover membrane 5 of heat dissipation area.
In this embodiment, the PET film layer 1 is made of a PET material, which is a high flame retardant material, and can effectively play a role in fire prevention.
In this embodiment, the adhesive layer 3 is bonded to the lithium battery.
The second embodiment is as follows: the present embodiment differs from the specific embodiment in that the thickness of the heat dissipation layer 2 is 22 to 28 micrometers. The other is the same as in the first embodiment.
And a third specific embodiment: the present embodiment is different from the specific embodiment in that the cavities and the heat dissipation holes 4 are staggered. The other is the same as in the first embodiment.
The specific embodiment IV is as follows: the first difference between this embodiment and the specific embodiment is that the heat dissipation holes 4 penetrate through the PET film layer 1, the heat dissipation layer 2, and the adhesive layer 3. The other is the same as in the first embodiment.
Fifth embodiment: the present embodiment is different from the specific embodiment in that the area of the cover film 5 is consistent with the area of the heat dissipation area. The other is the same as in the first embodiment.
Specific embodiment six: the present embodiment is different from the specific embodiment in that a cover sheet 6 is fixedly connected to one side of the cover film 5. The other is the same as in the first embodiment.
In the present embodiment, the cover film 5 is peeled off by pulling the peeling sheet 6, so that the heat dissipation holes 4 are exposed.
The beneficial effects of the utility model are verified by the following examples:
examples:
referring to fig. 1 to 3, the flame-retardant composite film for lithium battery of the present embodiment is sequentially divided into a PET film layer 1, a heat dissipation layer 2 and an adhesive layer 3 from top to bottom;
the heat dissipation layer 2 comprises an upper heat conduction silica gel layer 21 and a lower heat conduction silica gel layer 22, a cavity is formed between the upper heat conduction silica gel layer 21 and the lower heat conduction silica gel layer 22, and graphene powder 23 is filled in the cavity;
the lower surface of the upper heat-conducting silica gel layer 21 is consistent with the upper surface structure of the lower heat-conducting silica gel layer 22 and has a concave-convex structure;
the PET rete 1 upper surface equidistance is provided with the heat dissipation area, the heat dissipation area has evenly seted up louvre 4, the top bonding cover membrane 5 of heat dissipation area.
In this embodiment, the PET film layer 1 is made of a PET material, which is a high flame retardant material, and can effectively play a role in fire prevention.
In this embodiment, the adhesive layer 3 is adhered to the lithium battery.
The thickness of the heat dissipation layer 2 in this embodiment is 22-28 micrometers.
In this embodiment, the cavities and the heat dissipation holes 4 are staggered.
In this embodiment, the heat dissipation holes 4 penetrate through the PET film layer 1, the heat dissipation layer 2, and the adhesive layer 3.
The area of the cover film 5 in this embodiment corresponds to the area of the heat dissipation area.
In this embodiment, a cover sheet 6 is fixedly connected to one side of the cover film 5.
In this embodiment, uncover piece 6 through the pulling and uncover covering film 5 for louvre 4 exposes, can be convenient for give off the heat that produces the lithium cell during operation through louvre 4 that sets up, effectually avoided because of its heat can't normally give off under the parcel of film of lithium cell, make easy because the overheated problem that damages appears of lithium cell, the radiating area that the equidistance set up can improve radiating efficiency, and because the timely discharge of heat, can prevent that the film from appearing the circumstances of separation because of the too high messenger's viscidity reduces, can also prevent simultaneously that the phenomenon of spontaneous combustion from appearing because of the too high temperature of lithium cell.
In this embodiment, heat can be conducted through the upper heat-conducting silica gel layer 21, the graphene powder 23 and the lower heat-conducting silica gel layer 22, so that the purpose of heat dissipation is achieved, the problem that a lithium battery is damaged due to overheating is further prevented, and the contact area between the upper heat-conducting silica gel layer 21 and the lower heat-conducting silica gel layer 22 and the graphene powder 23 can be enlarged due to the concave-convex structural design of the upper heat-conducting silica gel layer 21 and the lower heat-conducting silica gel layer 22, so that the heat dissipation speed is accelerated.
The foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (6)
1. The lithium battery flame-retardant composite film is characterized by being sequentially divided into a PET film layer (1), a heat dissipation layer (2) and an adhesive layer (3) from top to bottom;
the heat dissipation layer (2) comprises an upper heat conduction silica gel layer (21) and a lower heat conduction silica gel layer (22), a cavity is formed between the upper heat conduction silica gel layer (21) and the lower heat conduction silica gel layer (22), and graphene powder (23) is filled in the cavity;
the lower surface of the upper heat-conducting silica gel layer (21) is consistent with the upper surface structure of the lower heat-conducting silica gel layer (22) and is of a concave-convex structure;
the PET film layer (1) upper surface equidistance is provided with the heat dissipation area, the heat dissipation area has evenly seted up louvre (4), the top bonding cover film (5) of heat dissipation area.
2. The lithium battery flame-retardant composite film according to claim 1, wherein the thickness of the heat dissipation layer (2) is 22-28 micrometers.
3. The lithium battery flame-retardant composite film according to claim 1, wherein the cavities and the heat dissipation holes (4) are arranged in a staggered manner.
4. The lithium battery flame-retardant composite film according to claim 1 is characterized in that the radiating holes (4) penetrate through the PET film layer (1), the radiating layer (2) and the adhesive layer (3).
5. The lithium battery flame-retardant composite film according to claim 1, wherein the area of the cover film (5) is consistent with the area of the heat dissipation area.
6. The lithium battery flame-retardant composite film according to claim 1, wherein a uncovering piece (6) is fixedly connected to one side of the covering film (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320339013.6U CN219950873U (en) | 2023-02-28 | 2023-02-28 | Flame-retardant composite film for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320339013.6U CN219950873U (en) | 2023-02-28 | 2023-02-28 | Flame-retardant composite film for lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219950873U true CN219950873U (en) | 2023-11-03 |
Family
ID=88543044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320339013.6U Active CN219950873U (en) | 2023-02-28 | 2023-02-28 | Flame-retardant composite film for lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219950873U (en) |
-
2023
- 2023-02-28 CN CN202320339013.6U patent/CN219950873U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |