Concave-convex adhesive film for aerogel heat insulation pad and low-cost aerogel composite material heat insulation pad packaging structure

Abstract

The utility model discloses a concave-convex adhesive film for an aerogel heat insulation pad and a low-cost packaging structure for an aerogel composite material heat insulation pad, which adopts the optimized design that a packaging film is designed into a concave-convex adhesive film structure with a concave-convex structure, a frame shaped like a Chinese character'hui 'is made of a foaming material, and a double faced adhesive tape is die-cut into strips and is only attached to the upper end surface of the frame shaped like the Chinese character'hui'. As the aerogel composite material is not adjusted, the scheme can keep the original heat insulation performance, and the performance can meet the market demand and is kept consistent with the current mainstream promotion scheme; however, through the reasonable optimization design of the three main materials and the scheme, the cost of the whole aerogel heat insulation pad is greatly reduced, and the rapid development requirement of the new energy vehicle market is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat insulation packaging, and particularly relates to a concave-convex adhesive film for an aerogel heat insulation pad and a packaging structure of a low-cost aerogel composite material heat insulation pad. Background Art

[0002] With the continuous in-depth development of the new energy industry, the popularity of new energy vehicles has gradually expanded, and battery manufacturers and terminal vehicle manufacturers have launched various new energy vehicles at different levels. In order to establish their own brands, battery manufacturers and terminal vehicle manufacturers usually launch models with high cost performance as the main promotion to meet the market demand and customer needs. Subsequently, the cost pressure will become greater and greater. At present, the new energy batteries are mainly ternary lithium and lithium iron phosphate batteries. Among them, ternary lithium has a higher energy density, is more suitable for some models with long endurance, and is more suitable for some current mid- to high-end markets, meeting the development needs of current new energy electric vehicles.

[0003] The aerogel composite material packaging heat insulation pad plays an important role in protecting against thermal runaway of new energy battery cells, ensuring the personal and property safety of the vehicle and consumers. However, under the cost pressure, the relevant industries have also carried out cost reduction development, and the aerogel composite material packaging heat insulation pad is also an important part of it. On the basis of ensuring its stable performance, controlling the costs of various materials and processes to the optimal level is the key goal of the cost reduction direction of the aerogel composite material packaging heat insulation pad. Summary of the Utility Model

[0004] The utility model provides a concave-convex adhesive film for an aerogel heat insulation pad and a packaging structure of a low-cost aerogel composite material heat insulation pad to reduce the cost of the heat insulation pad.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A concave-convex adhesive film for an aerogel heat insulation pad includes an adhesive film matrix, and at least one thickened adhesive layer is arranged on the adhesive film matrix. The thickness of the thickened adhesive layer is greater than that of the adhesive film matrix, and the adhesive film matrix and the thickened adhesive layer form an uneven packaging film. This concave-convex adhesive film structure compresses the cost of the adhesive layer to the lowest level on the premise of ensuring the bonding situation (where the cost of the adhesive layer in the packaging film accounts for about 60%-80%), achieving the cost reduction goal of this solution.

[0007] As a preferred scheme of the utility model, the thickened adhesive layer is in a square shape with a hole in the middle and is used in combination with a square frame when applied.

[0008] As a preferred scheme of the utility model, the thickness of the thickened adhesive layer is 25-50 μm, and the thickened adhesive layer is the joint part with the square frame; the thickness of the adhesive film matrix is 1-10 μm, and the adhesive film matrix is the position in contact with the heat insulation core material and its own packaging part.

[0009] The present utility model also provides a low-cost encapsulation structure for an aerogel composite heat insulation pad, which includes an encapsulation film, a foamed U-shaped frame, a heat insulation core material, and double-sided adhesive strips; the encapsulation film is the above-mentioned concave-convex adhesive film, double-sided adhesive strips are pasted on the working surface of the foamed U-shaped frame, the heat insulation core material is placed in the accommodation hole of the foamed U-shaped frame, and the encapsulation film encapsulates the heat insulation core material and the foamed U-shaped frame. The material of the U-shaped frame is a liquid foamed silicone material, which is lighter. Compared with the traditional silicone material, it has a certain cost advantage. At the same time, when designing the battery module solution, the compression performance of the foamed material can be considered, and the space layout can be made more reasonable to achieve the maximum utilization rate; and the usage amount of the double-sided adhesive is reduced, greatly reducing the cost price of the double-sided adhesive material.

[0010] As a preferred solution of the present utility model, the thickened adhesive layer corresponds to the working end face of the foamed U-shaped frame.

[0011] As a preferred solution of the present utility model, the heat insulation core material is an aerogel composite felt.

[0012] Through the optimized design of making the encapsulation film into a concave-convex adhesive film structure with a concave-convex structure, using a foamed material for the U-shaped frame, and die-cutting the double-sided adhesive into strips and only attaching it to the upper end face of the U-shaped frame, since the aerogel composite material is not adjusted, this solution can maintain the original heat insulation performance, and the performance can meet the market demand and is consistent with the currently mainstream promoted solutions; but through the reasonable optimized design of the three main materials and the solution, the overall cost of the aerogel heat insulation pad is greatly reduced, meeting the rapid development needs of the new energy vehicle market. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic structural diagram of the concave-convex adhesive film of the present utility model.

[0015] Figure 2 It is a schematic structural diagram of the U-shaped frame of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] A concave-convex adhesive film for an aerogel heat insulation pad, as Figure 1 shown, includes an adhesive film matrix 1, and at least one thickened adhesive layer 2 is provided on the adhesive film matrix 1. The thickened adhesive layer 2 is in a square shape with a hole in the middle and is used in combination with a square frame during application. In this embodiment, four are taken as an example for display. The thickness of the thickened adhesive layer is greater than the thickness of the adhesive film matrix. The thickness of the thickened adhesive layer is 25-50 μm, and the thickened adhesive layer is the joint part with the square frame; the thickness of the adhesive film matrix is 1-10 μm, and the adhesive film matrix is the position in contact with the heat insulation core material and its own encapsulation part. The adhesive film matrix 1 and the thickened adhesive layer form an uneven encapsulation film. This concave-convex adhesive film structure minimizes the cost of the adhesive layer on the premise of ensuring the bonding situation (where the cost of the adhesive layer in the encapsulation film accounts for about 60%-80%), achieving the cost reduction goal of this solution.

[0018] The present utility model also provides a low-cost encapsulation structure for an aerogel composite material heat insulation pad, including an encapsulation film, a foamed square frame 3, a heat insulation core material, and double-sided adhesive strips; the encapsulation film is the above-mentioned concave-convex adhesive film, as Figure 1 shown, the heat insulation core material uses an aerogel composite material felt, and the foamed square frame is as Figure 2 shown. Double-sided adhesive strips are pasted on the working surface of the foamed square frame. The heat insulation core material is placed in the accommodation hole of the foamed square frame, and the encapsulation film encapsulates the heat insulation core material and the foamed square frame. The material of the square frame uses a liquid foamed silicone material, which is lighter. Compared with traditional silicone materials, it has a certain cost advantage. At the same time, when designing the battery module solution, the compression performance of the foamed material can be considered, making the space layout more reasonable and achieving the maximum utilization rate;

[0019] Moreover, for the square frame encapsulation solution, when generally designing the heat insulation pad, the thickness of the square frame is generally higher than the height of the aerogel material. Between the battery cell modules, only the double-sided adhesive material at the square frame part plays a fixing role, and the middle core material part is in a hollow state and has no function in the overall module design. Therefore, through the design of automated equipment, the double-sided adhesive is pasted on the square frame in a strip shape. Without affecting the installation of the overall module design, the use cost of the double-sided adhesive material can be saved to the greatest extent, making the overall low-cost solution optimal and reducing the usage amount of the double-sided adhesive, greatly reducing the cost price of the double-sided adhesive material.

[0020] In the description of this specification, the descriptions with reference to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0021] As described above, only the preferred specific embodiments of the present utility model are given, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A convexoconcave film for aerogel thermal insulation pad, characterized in that: It includes a film substrate (1), and at least one thickened glue layer (2) is arranged on the film substrate (1). The thickness of the thickened glue layer is greater than that of the film substrate. The film substrate (1) and the thickened glue layer form an uneven encapsulation film.

2. The convexoconcave film for aerogel thermal insulation pad according to claim 1, characterized in that: The thickened glue layer (2) is in a zigzag shape.

3. The convexoconcave film for aerogel thermal insulation pad according to claim 1 or 2, characterized in that: The thickness of the thickened glue layer is 25 - 50 μm; the thickness of the film substrate is 1 - 10 μm.

4. A low-cost aerogel composite thermal insulation pad packaging structure, characterized in that: It includes an encapsulation film, a foamed return-shaped frame, a heat insulation core material, and a double-sided adhesive tape; the encapsulation film is the uneven glue film described in claim 1 or 2. A double-sided adhesive tape is pasted on the working surface of the foamed return-shaped frame, and the heat insulation core material is placed in the accommodation hole of the foamed return-shaped frame. The encapsulation film encapsulates the heat insulation core material and the foamed return-shaped frame.

5. The low-cost aerogel composite thermal insulation pad packaging structure according to claim 4 is characterized in that: The thickened glue layer (2) corresponds to the working end face of the foamed return-shaped frame.

6. The low-cost aerogel composite thermal insulation pad packaging structure according to claim 4, characterized in that: The heat insulation core material is an aerogel composite felt.

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