CN213623953U - Flame-retardant PET (polyethylene terephthalate) insulating protective film for aluminum-shell power battery - Google Patents
Flame-retardant PET (polyethylene terephthalate) insulating protective film for aluminum-shell power battery Download PDFInfo
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- CN213623953U CN213623953U CN202021679386.0U CN202021679386U CN213623953U CN 213623953 U CN213623953 U CN 213623953U CN 202021679386 U CN202021679386 U CN 202021679386U CN 213623953 U CN213623953 U CN 213623953U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses an aluminum hull power battery is with insulating protective film of fire-retardant PET includes extremely down in proper order from last: an isolation layer; the upper end surface of the halogen-free flame-retardant PET film layer is covered with an isolation layer; the first flame-retardant adhesive layer is coated on the lower end face of the halogen-free flame-retardant PET film layer; a second flame retardant adhesive layer; the upper end face of the phase-change film is connected with the first flame-retardant adhesive layer, and the lower end face of the phase-change film is covered with the second flame-retardant adhesive layer; the thickness of the flame-retardant PET insulating protective film for the aluminum-shell power battery is 50-100 mu m. The utility model discloses an add phase transition film, first fire-retardant gluing agent layer and the fire-retardant gluing agent layer of second to the insulating protecting film of PET, under the combined action of three, effectively regulate and control the heat balance of brake force battery in the use, be difficult for appearing overheated or the supercooling phenomenon, ensure that the insulating protecting film of PET has good laminating performance for a long time.
Description
Technical Field
The utility model relates to a protection film technical field especially relates to an aluminum hull power battery is with insulating protective film of fire-retardant PET.
Background
In the assembly production process of new energy power lithium batteries, a special flame-retardant protective film is generally used for insulating and flame-retardant protecting a shell of a power battery. The protective film special for the power battery usually adopts a high-molecular PET film as a base material, and is coated with a special flame-retardant adhesive on the base material, wherein the total thickness is 50-1000 mu m. The protective film special for the power battery generally needs to have good viscosity, flame retardant property, high electrical insulation property and the like.
However, at present, a plurality of special protective films for power batteries cannot perform phase transition regulation on heat released by batteries, control the temperature change of the protective films at a reasonable balance point, cause the phenomenon of viscosity loss and upwarp of the protective films due to overheating, and cannot achieve the insulation protection effect in the whole life process of the batteries, thereby causing the safety problem of the batteries.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a can prevent overheated aluminum hull power battery with fire-retardant PET insulation protective film.
According to the utility model discloses a fire-retardant PET insulation protective film for aluminum hull power battery of the embodiment of the first aspect includes isolation layer, halogen-free fire-retardant PET film layer, first fire-retardant gluing agent layer, second fire-retardant gluing agent layer and phase transition film from top to bottom in proper order;
an isolation layer;
the upper end surface of the halogen-free flame-retardant PET film layer is covered with the isolation layer;
the first flame-retardant adhesive layer is coated on the lower end face of the halogen-free flame-retardant PET film layer;
a second flame retardant adhesive layer;
the upper end face of the phase-change film is connected with the first flame-retardant adhesive layer, and the lower end face of the phase-change film is covered with the second flame-retardant adhesive layer; the thickness of the flame-retardant PET insulating protective film for the aluminum-shell power battery is 50-100 mu m.
According to the utility model discloses aluminum hull power battery is with insulating protective film of fire-retardant PET has following technological effect at least: through adding phase change film, first fire-retardant gluing agent layer and the fire-retardant gluing agent layer of second to PET insulation protective film, under the combined action of three, effectively regulate and control the heat balance of braking force battery in the use, be difficult for appearing overheated or the supercooling phenomenon, ensure that PET insulation protective film has good laminating performance for a long time. The phase change film is coated between the two flame-retardant adhesive layers, so that the impact of external heat inside the battery can be buffered, and the safety and the use performance of the PET insulating protective film can be ensured.
According to some embodiments of the invention, the thickness of the halogen-free flame retardant PET film layer is 5-50 μm.
According to some embodiments of the invention, the phase change film has a thickness of 10-1000 μm.
According to some embodiments of the invention, the thickness of the isolation layer is 0.1-1 μm.
According to some embodiments of the invention, the barrier layer is a UV cured non-silicon barrier agent coating.
According to some embodiments of the utility model, first fire-retardant gluing agent layer with second fire-retardant gluing agent layer all is the coating that phase transition microcapsule, halogen-free flame retardant, acrylic acid ester pressure sensitive adhesive mix and build.
According to some embodiments of the utility model, the phase change film is high heat conduction solid graphite composite phase change material, high heat conduction solid graphite composite phase change material's coefficient of heat conductivity is 1-3W/m.k.
A preparation process of a flame-retardant PET insulating protective film for an aluminum-shell power battery comprises the following steps:
the method comprises the following steps: uniformly coating an isolation layer on the upper end face of a halogen-free flame-retardant PET film layer, and then placing at 80-120 ℃ for heat preservation and curing for 1-10min to obtain the isolation layer;
step two: uniformly coating the lower end face of the halogen-free flame-retardant PET film layer on the first flame-retardant adhesive layer, drying at 80-130 ℃, and carrying out heat preservation and curing for 1-20min to obtain a first flame-retardant adhesive layer;
step three: uniformly coating the lower end face of the phase change film on the second flame-retardant adhesive layer, drying at 80-130 ℃, and carrying out heat preservation and solidification for 1-20min to obtain a second flame-retardant adhesive layer;
step four: and compounding the first flame-retardant adhesive layer in the second step with the upper end face of the phase change film in the third step to finally obtain the flame-retardant PET insulating protective film for the aluminum-shell power battery with the five-layer structure.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic sectional structure view of a flame-retardant PET insulating protective film for an aluminum-case power battery according to an embodiment of the present invention;
reference numerals: the insulation layer 100, the halogen-free flame-retardant PET film layer 200, the first flame-retardant adhesive layer 300, the second flame-retardant adhesive layer 400 and the phase-change film 500.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation description is related to, for example, the orientation or positional relationship indicated by the upper, lower, front, rear, left, right, and middle parts is based on the orientation or positional relationship shown in the drawings. The description is for convenience only and to simplify the description, and is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, unless otherwise explicitly defined, words such as installation and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention by combining the specific contents of the technical solutions.
Referring to fig. 1, according to the utility model discloses aluminum hull power battery is with fire-retardant PET insulating protective film includes isolation layer 100 from last to down in proper order, there is not steamed fire-retardant PET thin layer 200, first fire-retardant gluing agent layer 300, the fire-retardant gluing agent layer 400 of second and phase transition film 500, the upper end face of steamed fire-retardant PET thin layer 200 covers and has isolation layer 100, first fire-retardant gluing agent layer 300 covers in the lower terminal surface of steamed fire-retardant PET thin layer 200, the up end and the first fire-retardant gluing agent layer 300 of phase transition film 500 are connected, the lower terminal surface of phase transition film 500 covers and has the fire-retardant gluing agent layer 400 of second, aluminum hull power battery is with fire-retardant PET insulating protective film's thickness is 50.
A preparation process of a flame-retardant PET insulating protective film for an aluminum-shell power battery comprises the following steps:
the method comprises the following steps: the isolation layer 100 is uniformly coated on the upper end face of the halogen-free flame-retardant PET film layer 200, and then is placed at 90-110 ℃ for heat preservation and solidification for 5min to obtain the isolation layer 100.
Step two: and then, uniformly coating the lower end face of the halogen-free flame-retardant PET film layer 200 on the first flame-retardant adhesive layer 300, then drying at the temperature of 100-115 ℃, and carrying out heat preservation and curing for 10min to obtain the first flame-retardant adhesive layer 300.
Step three: and then, uniformly coating the lower end face of the phase change film 500 on the second flame-retardant adhesive layer 400, then drying at the temperature of 100-115 ℃, and carrying out heat preservation and solidification for 8min to obtain the second flame-retardant adhesive layer 400.
Step four: and compounding the first flame-retardant adhesive layer 300 in the second step with the upper end face of the phase change film 500 in the third step to finally obtain the flame-retardant PET insulating protective film for the aluminum-shell power battery with the five-layer structure.
Because the phase-change film 500 has the characteristics of rapid heat absorption and heat dissipation, and the first flame-retardant adhesive layer 300 and the second flame-retardant adhesive layer 400 have certain flame-retardant effects, the heat balance of the braking force battery in the using process can be effectively regulated, the phenomenon of overheating or supercooling is not easy to occur, and the PET protective film is ensured to have excellent laminating performance for a long time. Specifically, the isolation layer 100 is a non-silicon isolation agent coating, the first flame-retardant adhesive layer 300 and the second flame-retardant adhesive layer 400 are both coatings formed by mixing phase-change microcapsules, halogen-free flame retardants and acrylate pressure-sensitive adhesives, and the phase-change film 500 is a high-thermal-conductivity solid graphite composite phase-change material.
In some embodiments of the present invention, the thickness of the halogen-free flame retardant PET film layer 200 is 5-50 μm.
In some embodiments of the present invention, the phase change film 500 has a thickness of 10-1000 μm.
In some embodiments of the present invention, the thickness of the isolation layer 100 is 0.1-1 μm.
In some embodiments of the present invention, the barrier layer is a UV cured non-silicon barrier agent coating.
The utility model discloses an in some embodiments, first fire-retardant gluing agent layer and second fire-retardant gluing agent layer are phase transition microcapsule, do not have the mixed coating of building of halogen-free flame retardant, acrylate pressure-sensitive adhesive.
The utility model discloses an in some embodiments, the phase change film is high heat conduction solid graphite composite phase change material, and high heat conduction solid graphite composite phase change material's coefficient of heat conductivity is 1 ~ 3W/m.k.
In the description herein, references to the description of the terms "some embodiments" or "conceivably" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. The utility model provides an aluminum hull power battery is with insulating protective film of fire-retardant PET which characterized in that includes from last to down in proper order:
an isolation layer (100);
the upper end surface of the halogen-free flame-retardant PET film layer (200) is covered with the isolation layer (100);
the first flame-retardant adhesive layer (300), wherein the lower end face of the halogen-free flame-retardant PET film layer (200) is coated with the first flame-retardant adhesive layer (300);
a second flame retardant adhesive layer (400);
the upper end face of the phase-change film (500) is connected with the first flame-retardant adhesive layer (300), and the lower end face of the phase-change film (500) is coated with the second flame-retardant adhesive layer (400); the thickness of the flame-retardant PET insulating protective film for the aluminum-shell power battery is 50-100 mu m.
2. The insulation protective film of flame retardant PET for the aluminum-shell power battery as claimed in claim 1, wherein the thickness of the halogen-free flame retardant PET film layer (200) is 5-50 μm.
3. The flame-retardant PET insulating protective film for the aluminum-shell power battery as claimed in claim 1, wherein the thickness of the phase change film (500) is 10-1000 μm.
4. The flame-retardant PET insulating protective film for the aluminum-shell power battery as claimed in claim 1, wherein the thickness of the isolation layer (100) is 0.1-1 μm.
5. The flame retardant PET insulating protective film for the aluminum-case power battery according to claim 1, characterized in that the isolating layer (100) is a UV-cured non-silicon isolating agent coating.
6. The flame-retardant PET insulating protective film for the aluminum-shell power battery as claimed in claim 1, wherein the phase change film (500) is a high thermal conductivity solid graphite composite phase change material, and the thermal conductivity coefficient of the high thermal conductivity solid graphite composite phase change material is 1-3W/m.k.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021679386.0U CN213623953U (en) | 2020-08-12 | 2020-08-12 | Flame-retardant PET (polyethylene terephthalate) insulating protective film for aluminum-shell power battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021679386.0U CN213623953U (en) | 2020-08-12 | 2020-08-12 | Flame-retardant PET (polyethylene terephthalate) insulating protective film for aluminum-shell power battery |
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| CN213623953U true CN213623953U (en) | 2021-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064837A (en) * | 2022-07-28 | 2022-09-16 | 宁德卓高新材料科技有限公司 | Flame-retardant diaphragm and preparation method and application thereof |
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- 2020-08-12 CN CN202021679386.0U patent/CN213623953U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064837A (en) * | 2022-07-28 | 2022-09-16 | 宁德卓高新材料科技有限公司 | Flame-retardant diaphragm and preparation method and application thereof |
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