CN219947496U - Composite heat insulation structure - Google Patents
Composite heat insulation structure Download PDFInfo
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- CN219947496U CN219947496U CN202320843251.0U CN202320843251U CN219947496U CN 219947496 U CN219947496 U CN 219947496U CN 202320843251 U CN202320843251 U CN 202320843251U CN 219947496 U CN219947496 U CN 219947496U
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- heat insulation
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- packaging layer
- fiber
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- 238000009413 insulation Methods 0.000 title claims abstract description 111
- 239000002131 composite material Substances 0.000 title claims abstract description 38
- 238000004806 packaging method and process Methods 0.000 claims abstract description 50
- 239000004964 aerogel Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims description 153
- 239000000835 fiber Substances 0.000 claims description 27
- 239000012790 adhesive layer Substances 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 13
- 229920002799 BoPET Polymers 0.000 claims description 11
- 239000011241 protective layer Substances 0.000 claims description 8
- 239000000741 silica gel Substances 0.000 claims description 8
- 229910002027 silica gel Inorganic materials 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 229920002748 Basalt fiber Polymers 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052863 mullite Inorganic materials 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052744 lithium Inorganic materials 0.000 abstract description 15
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000005538 encapsulation Methods 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000010445 mica Substances 0.000 description 5
- 229910052618 mica group Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 3
- 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 group 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 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920001289 polyvinyl ether Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 239000004760 aramid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Thermal Insulation (AREA)
Abstract
The utility model discloses a composite heat insulation structure, which comprises a heat insulation layer, wherein the heat insulation layer is made of composite aerogel powder pressed plates, and further comprises an upper packaging layer and a lower packaging layer, wherein the upper packaging layer and the lower packaging layer are respectively provided with an insulation blocking function, are laminated in sequence from top to bottom and are fixedly connected in sequence; the lithium battery cell has the advantages of excellent heat insulation performance, good mechanical property, light weight, contribution to light weight of new energy automobiles and no pollution to the lithium battery cell.
Description
Technical Field
The utility model relates to a heat insulation structure, in particular to a composite heat insulation structure.
Background
The new energy automobile uses a battery pack formed by lithium batteries to provide power, and the lithium batteries are easy to cause chain exothermic reaction under the conditions of overcharge, needling and collision, so that thermal runaway accidents such as smoking, fire and even explosion are caused. Thermal runaway is the most serious safety accident of lithium batteries, and directly threatens the life safety of users. The thermal runaway transmission problem of the battery pack is mainly solved currently through a thermal protection technology, for example, a thermal insulation material is placed between lithium battery cells, when thermal runaway occurs in a certain lithium battery cell, the thermal insulation material can effectively inhibit thermal runaway, and thermal runaway is prevented from being transmitted from the lithium battery cell with the thermal runaway to the periphery, so that the thermal runaway is controlled within the range of the single lithium battery cell.
The traditional heat insulation material for the lithium battery pack mainly comprises mica powder which is hot pressed to form a mica sheet, wherein the mica sheet has better heat resistance, but has worse heat insulation performance and larger specific gravity, and when the mica sheet is used between two lithium battery cells, the whole weight of the battery pack can be greatly increased, so that the light weight of a new energy automobile is not facilitated, and the cruising mileage of the new energy automobile is influenced.
The aerogel is a solid material with the lowest heat conductivity because of having a nano porous structure and low heat conduction system, and the heat insulation aerogel fiber felt appearing on the market is formed by compounding aerogel powder and a fiber base material, although the mass of the aerogel fiber felt is lighter than that of a mica sheet, the aerogel fiber felt has the defects of large brittleness, poor flexibility and the like because of the structural characteristics of the aerogel, the aerogel is easy to separate from the fiber base material when in use, the phenomenon of powder falling occurs, meanwhile, the content of the aerogel in the aerogel fiber felt is only 20-40% wt at most, the filling quantity of the aerogel with the heat insulation effect is limited, and therefore, the conventional aerogel fiber felt cannot meet the use requirement on occasions with higher heat insulation performance and mechanical property.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the composite heat insulation structure which has excellent heat insulation performance, good mechanical property and light weight, is beneficial to the light weight of a new energy automobile and does not pollute a lithium battery core.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a compound thermal-insulated structure, includes the insulating layer, the material of insulating layer be compound aerogel powder suppression panel, compound thermal-insulated structure still include encapsulation layer and lower encapsulation layer, last encapsulation layer with lower encapsulation layer all have insulating separation function, last encapsulation layer the insulating layer with lower encapsulation layer according to from the top down order range upon range of and fixed connection in proper order.
A first heat insulation supporting layer is arranged between the upper packaging layer and the heat insulation layer, and the upper packaging layer and the heat insulation layer are respectively and fixedly connected with the first heat insulation supporting layer.
A second heat insulation supporting layer is arranged between the lower packaging layer and the heat insulation layer, and the lower packaging layer and the heat insulation layer are respectively and fixedly connected with the second heat insulation supporting layer.
A first adhesive layer for fixedly connecting the first heat insulation supporting layer and the heat insulation layer is arranged between the first heat insulation supporting layer and the heat insulation layer.
The heat insulation layer is fixedly connected with the heat insulation layer and the second heat insulation supporting layer respectively, the second heat insulation supporting layer is located between the second adhesive layer and the lower packaging layer, and the second heat insulation supporting layer is fixedly connected with the second adhesive layer and the lower packaging layer respectively. In this structure, first thermal-insulated supporting layer and second thermal-insulated supporting layer are as the structural support layer in the compound thermal-insulated structure, can give compound thermal-insulated structure anti-tearing, flame shock resistance's function, promptly when certain lithium cell electric core takes place thermal runaway, compound thermal-insulated structure can not lead to the fact the structure unstability because of flame shock, cause blocking thermal runaway's effect and discounts greatly, and first viscose layer and second viscose layer make the connection between first thermal-insulated supporting layer and second thermal-insulated supporting layer and the thermal-insulated layer more firm simultaneously, thereby make compound thermal-insulated structure's overall structure stability better, mechanical properties is better.
The first heat-insulating supporting layer and the second heat-insulating supporting layer are made of any one of woven fabrics, knitted fabrics or non-woven fabrics formed by aramid fibers, glass fibers, pre-oxidized fiber fibers, rock wool, PET (polyethylene terephthalate) blend fibers, polyacrylonitrile fibers, high silica fibers, mullite fibers, basalt fibers, carbon fibers and other fibers with flame retardant functions.
The first adhesive layer and the second adhesive layer are both made of pressure-sensitive adhesive.
The pressure-sensitive adhesive is any one of natural rubber pressure-sensitive adhesive, synthetic rubber pressure-sensitive adhesive, thermoplastic elastomer pressure-sensitive adhesive, polyacrylate, polyurethane, polyvinyl chloride, polyvinyl ether, organic silicon and other resin pressure-sensitive adhesives.
The upper packaging layer and the lower packaging layer are made of any one of PET film, PP film, PE film, PVC film, PI film, single-sided aluminized PET film, double-sided aluminized PET film, metal aluminum foil film and other polymer films with insulation and flame retardance functions. In the structure, the toughness of the upper packaging layer and the lower packaging layer which are realized by adopting the films is better, the tensile strength is higher, in addition, the single-sided aluminized PET film, the double-sided aluminized PET film and the metal aluminum foil film have good reflecting capability on heat radiation, and the composite heat insulation structure has excellent heat resistance, cold resistance and chemical resistance, and better flame impact resistance, and can further improve the mechanical property of the composite heat insulation structure.
The outer side surface of the heat insulation layer is adhered with a silica gel protective layer, and the silica gel protective layer completely wraps the heat insulation layer. In this structure, protect the insulating layer through the silica gel protective layer, avoid the insulating layer because external force leads to the risk of local flaw to appear when the equipment, guarantee the whole encapsulation effect of composite heat insulation structure, simultaneously, the silica gel protective layer further reduces the insulating layer and leaks the risk that pollutes the lithium cell electricity core because the compound aerogel powder that leads to of upper package layer and lower package layer appear the crack in the use.
The thickness of the upper packaging layer is 0.05-0.2 mm, the thickness of the lower packaging layer is 0.05-0.2 mm, and the thickness of the heat insulation layer is 0.2-5 mm.
Compared with the prior art, the composite aerogel powder pressing plate has the advantages that the composite aerogel powder pressing plate is adopted as a main body to replace the existing aerogel fiber felt to realize heat insulation of the battery core, the composite aerogel powder content in the existing composite aerogel powder pressing plate is more than 70% wt, and therefore, the composite aerogel powder content in the heat insulation layer is more than 70% wt, and the heat insulation performance is superior to that of the aerogel fiber felt with the same thickness.
Drawings
FIG. 1 is a schematic view of a composite insulation structure according to a first embodiment of the present utility model;
FIG. 2 is a schematic view of a composite insulation structure according to a third embodiment of the present utility model;
FIG. 3 is a schematic structural view of a fourth embodiment of a composite insulation structure according to the present utility model;
FIG. 4 is a schematic view of a fifth embodiment of a composite insulation structure according to the present utility model;
fig. 5 is a schematic structural diagram of a composite heat insulation structure according to a sixth embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
Embodiment one: as shown in fig. 1, a composite heat insulation structure comprises a heat insulation layer 1, wherein the heat insulation layer 1 is made of composite aerogel powder pressed plates, the composite heat insulation structure further comprises an upper packaging layer 2 and a lower packaging layer 3, the upper packaging layer 2 and the lower packaging layer 3 have insulation blocking functions, and the upper packaging layer 2, the heat insulation layer 1 and the lower packaging layer 3 are sequentially laminated from top to bottom and are sequentially and fixedly connected.
In this embodiment, the materials of the upper packaging layer 2 and the lower packaging layer 3 are any one of a PET film, a PP film, a PE film, a PVC film, a PI film, a single-sided aluminized PET film, a double-sided aluminized PET film, a metal aluminum foil film, and other polymer films with insulation and flame retardance functions.
In this embodiment, the thickness of the upper encapsulation layer 2 and the lower encapsulation layer 3 are equal, and are both 0.05mm, and the thickness of the heat insulation layer 1 is 0.2mm.
Embodiment two: this embodiment is substantially the same as embodiment one, except that: in this embodiment, the thickness of the upper packaging layer 2 and the lower packaging layer 3 are equal, and are both 0.2mm, and the thickness of the heat insulating layer 1 is 5mm.
Embodiment III: this embodiment is substantially the same as the first or second embodiment, except that: as shown in fig. 2, in this embodiment, a first heat insulation supporting layer 4 is disposed between the upper packaging layer 2 and the heat insulation layer 1, and the upper packaging layer 2 and the heat insulation layer 1 are fixedly connected with the first heat insulation supporting layer 4 respectively.
Embodiment four: this embodiment is substantially the same as embodiment three except that: as shown in fig. 3, in this embodiment, a second heat insulation supporting layer 5 is disposed between the lower packaging layer 3 and the heat insulation layer 1, and the lower packaging layer 3 and the heat insulation layer 1 are fixedly connected with the second heat insulation supporting layer 5 respectively.
Fifth embodiment: this embodiment is substantially the same as embodiment three except that: as shown in fig. 4, in this embodiment, a first adhesive layer 6 for fixedly connecting the first insulating and supporting layer 4 and the insulating layer 1 is provided between them.
Example six: this embodiment is substantially the same as embodiment five except that: as shown in fig. 5, a second adhesive layer 7 and a second heat insulation supporting layer 5 are arranged between the heat insulation layer 1 and the lower packaging layer 3, the second adhesive layer 7 is located above the second heat insulation supporting layer 5, the second adhesive layer 7 is fixedly connected with the heat insulation layer 1 and the second heat insulation supporting layer 5 respectively, the second heat insulation supporting layer 5 is located between the second adhesive layer 7 and the lower packaging layer 3, and the second heat insulation supporting layer 5 is fixedly connected with the second adhesive layer 7 and the lower packaging layer 3 respectively.
In the third embodiment, that is, the sixth embodiment, the material of the first heat insulating and supporting layer 4 and the second heat insulating and supporting layer 5 is any one of woven fabric, knitted fabric or non-woven fabric composed of aramid fiber, glass fiber, pre-oxidized fiber, rock wool, PET blend fiber, polyacrylonitrile fiber, high silica fiber, mullite fiber, basalt fiber, carbon fiber and other fiber with flame retardant function.
In the fifth embodiment, the sixth embodiment, the materials of the first adhesive layer 6 and the second adhesive layer 7 are both pressure-sensitive adhesives. The pressure-sensitive adhesive is any one of natural rubber pressure-sensitive adhesive, synthetic rubber pressure-sensitive adhesive, thermoplastic elastomer pressure-sensitive adhesive, polyacrylate, polyurethane, polyvinyl chloride, polyvinyl ether, organosilicon and other resin type pressure-sensitive adhesives.
In the third embodiment, the sixth embodiment, the first heat-insulating support layer 4 and the second heat-insulating support layer 5 are used as structural support layers in the composite heat-insulating structure, so that the composite heat-insulating structure can resist tearing and flame impact, namely, when a certain lithium battery core is subject to thermal runaway, the composite heat-insulating structure cannot cause structural instability due to flame impact, so that the effect of blocking the thermal runaway is greatly reduced, and meanwhile, the first adhesive layer 6 and the second adhesive layer 7 enable the connection between the first heat-insulating support layer 4 and the second heat-insulating support layer 5 and the heat-insulating layer 1 to be firmer, so that the overall structural stability of the composite heat-insulating structure is better, and the mechanical property is better.
In all the embodiments, a silica gel protective layer may be attached to the outer side surface of the thermal insulation layer 1, and the thermal insulation layer 1 is completely wrapped by the silica gel protective layer to protect the thermal insulation layer 1.
Claims (10)
1. The composite heat insulation structure comprises a heat insulation layer and is characterized in that the heat insulation layer is made of composite aerogel powder pressed plates, the composite heat insulation structure further comprises an upper packaging layer and a lower packaging layer, the upper packaging layer and the lower packaging layer are respectively provided with an insulating barrier function, and the upper packaging layer, the heat insulation layer and the lower packaging layer are sequentially laminated from top to bottom and are sequentially and fixedly connected.
2. The composite heat insulation structure according to claim 1, wherein a first heat insulation supporting layer is arranged between the upper packaging layer and the heat insulation layer, and the upper packaging layer and the heat insulation layer are fixedly connected with the first heat insulation supporting layer respectively.
3. The composite heat insulation structure according to claim 2, wherein a second heat insulation supporting layer is arranged between the lower packaging layer and the heat insulation layer, and the lower packaging layer and the heat insulation layer are respectively and fixedly connected with the second heat insulation supporting layer.
4. The composite heat insulation structure according to claim 2, wherein a first adhesive layer for fixedly connecting the first heat insulation supporting layer and the heat insulation layer is provided between the first heat insulation supporting layer and the heat insulation layer.
5. The composite heat insulation structure according to claim 4, wherein a second adhesive layer and a second heat insulation supporting layer are disposed between the heat insulation layer and the lower packaging layer, the second adhesive layer is disposed above the second heat insulation supporting layer, the second adhesive layer is fixedly connected with the heat insulation layer and the second heat insulation supporting layer respectively, the second heat insulation supporting layer is disposed between the second adhesive layer and the lower packaging layer, and the second heat insulation supporting layer is fixedly connected with the second adhesive layer and the lower packaging layer respectively.
6. The composite heat insulation structure according to claim 3, wherein the first heat insulation supporting layer and the second heat insulation supporting layer are made of any one of aramid fiber, glass fiber, pre-oxidized fiber, rock wool, PET blend fiber, polyacrylonitrile fiber, silica rich fiber, mullite fiber, basalt fiber and carbon fiber.
7. The composite insulation structure of claim 5, wherein the first adhesive layer and the second adhesive layer are both pressure sensitive adhesive.
8. The composite heat insulation structure according to claim 1, wherein the upper packaging layer and the lower packaging layer are made of any one of a PET film, a PP film, a PE film, a PVC film, a PI film, a single-sided aluminized PET film, a double-sided aluminized PET film and a metal aluminum foil film.
9. The composite heat insulation structure according to claim 1, wherein the thickness of the upper packaging layer is 0.05-0.2 mm, the thickness of the lower packaging layer is 0.05-0.2 mm, and the thickness of the heat insulation layer is 0.2-5 mm.
10. A composite insulation structure according to any one of claims 1 to 9, wherein a silica gel protective layer is attached to the outer side of the insulation layer, and the silica gel protective layer completely encapsulates the insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320843251.0U CN219947496U (en) | 2023-04-14 | 2023-04-14 | Composite heat insulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320843251.0U CN219947496U (en) | 2023-04-14 | 2023-04-14 | Composite heat insulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219947496U true CN219947496U (en) | 2023-11-03 |
Family
ID=88539570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320843251.0U Active CN219947496U (en) | 2023-04-14 | 2023-04-14 | Composite heat insulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219947496U (en) |
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2023
- 2023-04-14 CN CN202320843251.0U patent/CN219947496U/en active Active
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