Phase change silica gel heat insulation pad with single edge sealing structure

Abstract

The utility model discloses a phase change silica gel heat insulation pad with a single edge sealing structure, which comprises a packaging film, a heat insulation core material and a composite phase change silica gel film, and the composite phase change silica gel film is arranged on at least one working end face of the heat insulation core material to form the phase change silica gel heat insulation core material. The composite phase change silica gel film comprises a phase change layer and a silica gel layer which are laminated and compounded, and the silica gel layer is in contact with the working end face of the heat insulation core material; the phase change silica gel heat insulation core material is packaged by the packaging film, and a sealing edge is formed on one side end face of the phase change silica gel heat insulation core material. The composite phase change silica gel film not only has the characteristics of large latent heat and high heat conductivity coefficient of a phase change material, but also has the characteristics of high flame retardance, flexibility and flame impact resistance of silica gel.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy thermal insulation, and in particular relates to a phase-change silica gel thermal insulation pad with a single-edge sealing structure. Background Art

[0002] Electric vehicles use electricity as their main driving energy source. Their application and promotion can reduce the consumption of oil resources by vehicles, and can alleviate the "urban heat island effect" to achieve the goal of improving the environment. The driving power of electric vehicles is mainly provided by power batteries. Therefore, the performance of power batteries largely determines the performance of electric vehicles, such as driving range and safety. In practical applications, the key factors affecting the performance of power batteries are their energy density and service life. At present, in order to solve the thermal runaway of the battery system, thermal insulation pads are widely added between batteries, thereby avoiding the occurrence of thermal runaway to a certain extent. In extremely cold weather, although heating films are currently placed in battery modules or between battery cells, they need to be heated externally to work. If the heating film wiring harness fails, the heating effect will be lost, thus affecting the driving range and battery life. Utility Model Content

[0003] In view of the deficiencies described in the above-mentioned prior art, the utility model provides a phase change silicone thermal insulation pad with a single-edge sealing structure. By composite phase change silicone, the phase change material is utilized to release a large amount of heat during the phase change process, and then the battery cells or modules are heated, thereby maintaining the temperature uniformity of the battery cells or battery modules, further improving their cruising range at low temperatures, and reducing the energy consumption of the entire vehicle. In addition, the unique packaging structure reduces the volume occupied by the thermal insulation pad.

[0004] The technical solution adopted by the utility model is:

[0005] A phase-change silicone thermal insulation pad with a single-edge sealing structure includes a packaging film, a thermal insulation core material, and a composite phase-change silicone film. The composite phase-change silicone film is arranged on at least one working end face of the thermal insulation core material to form a phase-change silicone thermal insulation core material. The composite phase-change silicone film includes a layered composite phase-change layer and a silicone layer, and the silicone layer is in contact with the working end face of the thermal insulation core material. The packaging film encapsulates the phase-change silicone thermal insulation core material and forms an edge sealing on one side end face of the phase-change silicone thermal insulation core material. The composite phase-change silicone film not only has the large latent heat and high thermal conductivity of the phase-change material, but also has the high flame retardancy, flexibility, and flame impact resistance of silicone.

[0006] As a preferred solution of the utility model, both working end surfaces of the thermal insulation core material are provided with a composite phase-change silica gel film.

[0007] As a preferred solution of the utility model, part of the packaging film at the side end surface of the phase change silicone insulation core material where no edge sealing is formed is folded to the working end surface of the phase change silicone insulation core material to form a folded portion, and the packaging film at the side end surface of the phase change silicone insulation core material where an edge sealing is formed is sealed together.

[0008] As a preferred solution of the utility model, in order to simplify the packaging, the packaging film is a one-piece film. After the phase change silicone insulation core material is placed on the packaging film, the packaging film is folded so that the packaging film is in contact with one side end face of the phase change silicone insulation core material. After the packaging film is folded, three edges to be packaged are formed, two of which are folded onto the working end face of the phase change silicone insulation core material, and the other is directly bonded to form a single-edge sealed structure, thereby increasing the area of ​​the phase change silicone insulation core material.

[0009] As a preferred solution of the utility model, the edge sealing is flush with the working end surface of the phase change silicone insulation core material or the edge sealing is located on the side end surface of the phase change silicone insulation core material between the working end surfaces.

[0010] As a preferred solution of the utility model, the packaging film is an organic film, a metal foil or a thermoplastic film.

[0011] As a preferred solution of the utility model, in order to improve the buffering performance of the thermal insulation pad, a buffer strip is provided at the edge sealing.

[0012] As a preferred solution of the utility model, the buffer strip is at least one of a ceramic silicone rubber strip, a common silicone rubber strip, an MPP strip, and a silicone foam strip.

[0013] As a preferred solution of the utility model, the thickness of the phase change layer is 0.02mm-1mm, and the thickness of the silicone layer is 0.2mm-3mm.

[0014] As a preferred embodiment of the present invention, the thermal insulation core material is glass fiber aerogel felt, ceramic fiber aerogel felt or pre-oxidized silk aerogel felt.

[0015] The utility model is used in the field of new energy insulation and has the following beneficial effects:

[0016] 1. The phase change layer can release heat at the phase change temperature, and can heat the battery cells or modules in extremely cold weather, thereby maintaining its temperature uniformity at low temperatures and improving the battery life of the electric vehicle;

[0017] 2. The silicone layer is highly flame retardant, flexible, and flame-resistant, which further enhances the thermal insulation, shock resistance, and impact resistance.

[0018] 3. It breaks the external heating method of traditional PTC heating film and reduces the energy consumption of the whole vehicle;

[0019] 4. Use a whole piece of packaging film to achieve single-side edge sealing, reduce welding interfaces, and reduce the risk of air leakage;

[0020] 5. Phase change silica gel composite can avoid direct contact between the phase change layer and the aerogel core material, reduce the risk of phase change material infiltrating into the aerogel core material, and thus improve thermal insulation and heat preservation performance;

[0021] 6. The buffer strip is set at the edge sealing, which can maximize the use of the battery pack space and make the whole vehicle lightweight;

[0022] 7. No need to glue the entire surface, only glue on the buffer strip, which reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the composite phase-change silica gel film of the utility model.

[0025] Figure 2 It is a top view of the thermal insulation pad of the utility model.

[0026] Figure 3 This is a cross-sectional view of a working end face of the utility model provided with a composite phase-change silicone film.

[0027] Figure 4 This is a cross-sectional view of the utility model in which a composite phase-change silicone film is arranged on two working end surfaces. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example:

[0030] A phase change silicone thermal insulation pad with a single edge sealing structure, such as Figure 2 As shown, it includes a packaging film 1, a heat-insulating core material 2 and a composite phase-change silica gel film, wherein the heat-insulating core material is glass fiber aerogel felt, ceramic fiber aerogel felt or pre-oxidized silk aerogel felt.

[0031] A composite phase-change silicone film is arranged on at least one working end surface of the heat-insulating core material 2 to form a phase-change silicone heat-insulating core material, that is, it can be arranged on only one working end surface, such as Figure 3 As shown, both working end faces can also be set, such as Figure 4 shown.

[0032] The composite phase-change silica gel film comprises a layered composite phase-change layer 31 and a silica gel layer 32. Figure 1 As shown, the silicone layer contacts the working end surface of the heat-insulating core material; the thickness of the phase change layer is 0.02mm-1mm, the thickness of the silicone layer is 0.2mm-3mm, and the silicone layer can be ceramic silicone rubber and ordinary silicone rubber.

[0033] The packaging film 1 packages the phase-change silicone thermal insulation core material and forms a sealed edge on one side end surface of the phase-change silicone thermal insulation core material.

[0034] Moreover, the packaging film used is a whole piece, which can be an organic film, a metal foil or a thermoplastic film. The most commonly used ones are TPU and EVA. After the phase change silicone insulation core material is placed on the packaging film, the packaging film is folded so that the packaging film contacts one side end face of the phase change silicone insulation core material. After the packaging film is folded, three edges to be packaged are formed. The packaging film parts at the two side end faces of the phase change silicone insulation core material that do not form a sealed edge are folded onto the working end face of the phase change silicone insulation core material to form a folded portion 11, and the packaging films at the side end faces of the phase change silicone insulation core material that form a sealed edge are sealed together, that is, two of the edges to be packaged are folded onto the working end face of the phase change silicone insulation core material, and the other is directly bonded to form a single sealed edge structure, thereby increasing the area of ​​the phase change silicone insulation core material. Figure 2 shown.

[0035] The position of the formed edge sealing 12 can be flush with the working end surface of the phase change silicone thermal insulation core material, or can be located on the side end surface of the phase change silicone thermal insulation core material between the working end surfaces.

[0036] In order to improve the buffering performance of the thermal insulation pad, a buffer strip is provided at the edge sealing portion, and the buffer strip is at least one of a ceramic silicone rubber strip, a common silicone rubber strip, an MPP strip, and a silicone foam strip.

[0037] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A phase change silicone thermal insulation pad with a single edge sealing structure, characterized in that: The invention comprises a packaging film (1), a heat-insulating core material (2) and a composite phase-change silicone film. The composite phase-change silicone film is arranged on at least one working end face of the heat-insulating core material (2) to form a phase-change silicone heat-insulating core material. The composite phase-change silicone film comprises a layered composite phase-change layer and a silicone layer. The silicone layer contacts the working end face of the heat-insulating core material. The packaging film (1) packages the phase-change silicone heat-insulating core material and forms a sealed edge on one side end face of the phase-change silicone heat-insulating core material.

2. The phase-change silicone thermal insulation pad with a single-edge sealing structure according to claim 1, characterized in that: Both working end surfaces of the heat-insulating core material are provided with composite phase-change silica gel films.

3. The phase-change silicone thermal insulation pad with a single-edge sealing structure according to claim 1 or 2, characterized in that: The packaging film portion at the side end surface of the phase change silicone insulation core material where no edge sealing is formed is folded to the working end surface of the phase change silicone insulation core material to form a folded portion, and the packaging film at the side end surface of the phase change silicone insulation core material where an edge sealing is formed is sealed together.

4. The phase-change silicone thermal insulation pad with a single-edge sealing structure according to claim 3 is characterized in that: The packaging film is a one-piece film.

5. The phase-change silicone thermal insulation pad with a single-edge sealing structure according to claim 3 is characterized in that: The edge seal is flush with the working end surface of the phase-change silicone heat-insulating core material or the edge seal is located on the side end surface of the phase-change silicone heat-insulating core material between the working end surfaces.

6. The phase-change silicone thermal insulation pad with a single-edge sealing structure according to claim 4, characterized in that: The packaging film is an organic film, a metal foil or a thermoplastic film.

7. The phase-change silicone thermal insulation pad with a single-edge sealing structure according to claim 3, characterized in that: A buffer strip is provided at the edge sealing.

8. The phase-change silicone thermal insulation pad with a single-edge sealing structure according to claim 7, characterized in that: The buffer strip is at least one of a ceramic silicone rubber strip, a common silicone rubber strip, an MPP strip, and a silicone foam strip.

9. The phase-change silicone thermal insulation pad with a single-edge sealing structure according to claim 1, characterized in that: The thickness of the phase change layer is 0.02 mm-1 mm, and the thickness of the silica gel layer is 0.2 mm-3 mm.

10. The phase-change silica gel thermal insulation pad with a single edge-sealed structure according to claim 1, characterized in that: The heat-insulating core material is glass fiber aerogel felt, ceramic fiber aerogel felt or pre-oxidized silk aerogel felt.

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